/* Alpha specific support for 64-bit ELF
- Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002
- Free Software Foundation, Inc.
+ Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+ 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@tamu.edu>.
-This file is part of BFD, the Binary File Descriptor library.
+ This file is part of BFD, the Binary File Descriptor library.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* We need a published ABI spec for this. Until one comes out, don't
assume this'll remain unchanged forever. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
#define ECOFF_64
#include "ecoffswap.h"
-static int alpha_elf_dynamic_symbol_p
- PARAMS((struct elf_link_hash_entry *, struct bfd_link_info *));
-static struct bfd_hash_entry * elf64_alpha_link_hash_newfunc
- PARAMS((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
-static struct bfd_link_hash_table * elf64_alpha_bfd_link_hash_table_create
- PARAMS((bfd *));
-
-static bfd_reloc_status_type elf64_alpha_reloc_nil
- PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static bfd_reloc_status_type elf64_alpha_reloc_bad
- PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static bfd_reloc_status_type elf64_alpha_do_reloc_gpdisp
- PARAMS((bfd *, bfd_vma, bfd_byte *, bfd_byte *));
-static bfd_reloc_status_type elf64_alpha_reloc_gpdisp
- PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-
-static reloc_howto_type * elf64_alpha_bfd_reloc_type_lookup
- PARAMS((bfd *, bfd_reloc_code_real_type));
-static void elf64_alpha_info_to_howto
- PARAMS((bfd *, arelent *, Elf_Internal_Rela *));
-
-static boolean elf64_alpha_mkobject
- PARAMS((bfd *));
-static boolean elf64_alpha_object_p
- PARAMS((bfd *));
-static boolean elf64_alpha_section_from_shdr
- PARAMS((bfd *, Elf_Internal_Shdr *, const char *));
-static boolean elf64_alpha_section_flags
- PARAMS((flagword *, Elf_Internal_Shdr *));
-static boolean elf64_alpha_fake_sections
- PARAMS((bfd *, Elf_Internal_Shdr *, asection *));
-static boolean elf64_alpha_create_got_section
- PARAMS((bfd *, struct bfd_link_info *));
-static boolean elf64_alpha_create_dynamic_sections
- PARAMS((bfd *, struct bfd_link_info *));
-
-static boolean elf64_alpha_read_ecoff_info
- PARAMS((bfd *, asection *, struct ecoff_debug_info *));
-static boolean elf64_alpha_is_local_label_name
- PARAMS((bfd *, const char *));
-static boolean elf64_alpha_find_nearest_line
- PARAMS((bfd *, asection *, asymbol **, bfd_vma, const char **,
- const char **, unsigned int *));
-
-#if defined(__STDC__) || defined(ALMOST_STDC)
-struct alpha_elf_link_hash_entry;
+\f
+/* Instruction data for plt generation and relaxation. */
+
+#define OP_LDA 0x08
+#define OP_LDAH 0x09
+#define OP_LDQ 0x29
+#define OP_BR 0x30
+#define OP_BSR 0x34
+
+#define INSN_LDA (OP_LDA << 26)
+#define INSN_LDAH (OP_LDAH << 26)
+#define INSN_LDQ (OP_LDQ << 26)
+#define INSN_BR (OP_BR << 26)
+
+#define INSN_ADDQ 0x40000400
+#define INSN_RDUNIQ 0x0000009e
+#define INSN_SUBQ 0x40000520
+#define INSN_S4SUBQ 0x40000560
+#define INSN_UNOP 0x2ffe0000
+
+#define INSN_JSR 0x68004000
+#define INSN_JMP 0x68000000
+#define INSN_JSR_MASK 0xfc00c000
+
+#define INSN_A(I,A) (I | (A << 21))
+#define INSN_AB(I,A,B) (I | (A << 21) | (B << 16))
+#define INSN_ABC(I,A,B,C) (I | (A << 21) | (B << 16) | C)
+#define INSN_ABO(I,A,B,O) (I | (A << 21) | (B << 16) | ((O) & 0xffff))
+#define INSN_AD(I,A,D) (I | (A << 21) | (((D) >> 2) & 0x1fffff))
+
+/* PLT/GOT Stuff */
+
+/* Set by ld emulation. Putting this into the link_info or hash structure
+ is simply working too hard. */
+#ifdef USE_SECUREPLT
+bfd_boolean elf64_alpha_use_secureplt = TRUE;
+#else
+bfd_boolean elf64_alpha_use_secureplt = FALSE;
#endif
-static boolean elf64_alpha_output_extsym
- PARAMS((struct alpha_elf_link_hash_entry *, PTR));
-
-static boolean elf64_alpha_can_merge_gots
- PARAMS((bfd *, bfd *));
-static void elf64_alpha_merge_gots
- PARAMS((bfd *, bfd *));
-static boolean elf64_alpha_calc_got_offsets_for_symbol
- PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
-static void elf64_alpha_calc_got_offsets PARAMS ((struct bfd_link_info *));
-static boolean elf64_alpha_size_got_sections
- PARAMS ((struct bfd_link_info *));
-static boolean elf64_alpha_size_plt_section
- PARAMS ((struct bfd_link_info *));
-static boolean elf64_alpha_size_plt_section_1
- PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
-static boolean elf64_alpha_always_size_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static int alpha_dynamic_entries_for_reloc
- PARAMS ((int, int, int));
-static boolean elf64_alpha_calc_dynrel_sizes
- PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *));
-static boolean elf64_alpha_size_rela_got_section
- PARAMS ((struct bfd_link_info *));
-static boolean elf64_alpha_size_rela_got_1
- PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *));
-static boolean elf64_alpha_add_symbol_hook
- PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
- const char **, flagword *, asection **, bfd_vma *));
-static struct alpha_elf_got_entry *get_got_entry
- PARAMS ((bfd *, struct alpha_elf_link_hash_entry *, unsigned long,
- unsigned long, bfd_vma));
-static boolean elf64_alpha_check_relocs
- PARAMS((bfd *, struct bfd_link_info *, asection *sec,
- const Elf_Internal_Rela *));
-static boolean elf64_alpha_adjust_dynamic_symbol
- PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *));
-static boolean elf64_alpha_size_dynamic_sections
- PARAMS((bfd *, struct bfd_link_info *));
-static boolean elf64_alpha_relocate_section_r
- PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
-static boolean elf64_alpha_relocate_section
- PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
-static boolean elf64_alpha_finish_dynamic_symbol
- PARAMS((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
- Elf_Internal_Sym *));
-static boolean elf64_alpha_finish_dynamic_sections
- PARAMS((bfd *, struct bfd_link_info *));
-static boolean elf64_alpha_final_link
- PARAMS((bfd *, struct bfd_link_info *));
-static boolean elf64_alpha_merge_ind_symbols
- PARAMS((struct alpha_elf_link_hash_entry *, PTR));
-static Elf_Internal_Rela * elf64_alpha_find_reloc_at_ofs
- PARAMS ((Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_vma, int));
-static enum elf_reloc_type_class elf64_alpha_reloc_type_class
- PARAMS ((const Elf_Internal_Rela *));
+#define OLD_PLT_HEADER_SIZE 32
+#define OLD_PLT_ENTRY_SIZE 12
+#define NEW_PLT_HEADER_SIZE 36
+#define NEW_PLT_ENTRY_SIZE 4
+
+#define PLT_HEADER_SIZE \
+ (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE)
+#define PLT_ENTRY_SIZE \
+ (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE)
+
+#define MAX_GOT_SIZE (64*1024)
+
+#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
\f
-struct alpha_elf_link_hash_entry
+
+/* Used to implement multiple .got subsections. */
+struct alpha_elf_got_entry
{
- struct elf_link_hash_entry root;
+ struct alpha_elf_got_entry *next;
- /* External symbol information. */
- EXTR esym;
+ /* Which .got subsection? */
+ bfd *gotobj;
- /* Cumulative flags for all the .got entries. */
- int flags;
+ /* The addend in effect for this entry. */
+ bfd_vma addend;
- /* Contexts in which a literal was referenced. */
-#define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
-#define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
-#define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
-#define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
-#define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
-#define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
-#define ALPHA_ELF_LINK_HASH_LU_FUNC 0x38
-#define ALPHA_ELF_LINK_HASH_TLS_IE 0x40
+ /* The .got offset for this entry. */
+ int got_offset;
- /* Used to implement multiple .got subsections. */
- struct alpha_elf_got_entry
- {
- struct alpha_elf_got_entry *next;
+ /* The .plt offset for this entry. */
+ int plt_offset;
+
+ /* How many references to this entry? */
+ int use_count;
- /* which .got subsection? */
- bfd *gotobj;
+ /* The relocation type of this entry. */
+ unsigned char reloc_type;
- /* the addend in effect for this entry. */
- bfd_vma addend;
+ /* How a LITERAL is used. */
+ unsigned char flags;
- /* the .got offset for this entry. */
- int got_offset;
+ /* Have we initialized the dynamic relocation for this entry? */
+ unsigned char reloc_done;
- /* How many references to this entry? */
- int use_count;
+ /* Have we adjusted this entry for SEC_MERGE? */
+ unsigned char reloc_xlated;
+};
- /* The relocation type of this entry. */
- unsigned char reloc_type;
+struct alpha_elf_reloc_entry
+{
+ struct alpha_elf_reloc_entry *next;
- /* How a LITERAL is used. */
- unsigned char flags;
+ /* Which .reloc section? */
+ asection *srel;
- /* Have we initialized the dynamic relocation for this entry? */
- unsigned char reloc_done;
+ /* What kind of relocation? */
+ unsigned int rtype;
- /* Have we adjusted this entry for SEC_MERGE? */
- unsigned char reloc_xlated;
- } *got_entries;
+ /* Is this against read-only section? */
+ unsigned int reltext : 1;
- /* used to count non-got, non-plt relocations for delayed sizing
- of relocation sections. */
- struct alpha_elf_reloc_entry
- {
- struct alpha_elf_reloc_entry *next;
+ /* How many did we find? */
+ unsigned long count;
+};
+
+struct alpha_elf_link_hash_entry
+{
+ struct elf_link_hash_entry root;
+
+ /* External symbol information. */
+ EXTR esym;
- /* which .reloc section? */
- asection *srel;
+ /* Cumulative flags for all the .got entries. */
+ int flags;
- /* what kind of relocation? */
- unsigned int rtype;
+ /* Contexts in which a literal was referenced. */
+#define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
+#define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
+#define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
+#define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
+#define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
+#define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
+#define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40
+#define ALPHA_ELF_LINK_HASH_LU_PLT 0x38
+#define ALPHA_ELF_LINK_HASH_TLS_IE 0x80
- /* is this against read-only section? */
- unsigned int reltext : 1;
+ /* Used to implement multiple .got subsections. */
+ struct alpha_elf_got_entry *got_entries;
- /* how many did we find? */
- unsigned long count;
- } *reloc_entries;
+ /* Used to count non-got, non-plt relocations for delayed sizing
+ of relocation sections. */
+ struct alpha_elf_reloc_entry *reloc_entries;
};
/* Alpha ELF linker hash table. */
/* The head of a list of .got subsections linked through
alpha_elf_tdata(abfd)->got_link_next. */
bfd *got_list;
+
+ /* The most recent relax pass that we've seen. The GOTs
+ should be regenerated if this doesn't match. */
+ int relax_trip;
};
/* Look up an entry in a Alpha ELF linker hash table. */
#define alpha_elf_link_hash_traverse(table, func, info) \
(elf_link_hash_traverse \
(&(table)->root, \
- (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
+ (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
(info)))
/* Get the Alpha ELF linker hash table from a link_info structure. */
#define alpha_elf_hash_table(p) \
- ((struct alpha_elf_link_hash_table *) ((p)->hash))
+ (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
+ == ALPHA_ELF_DATA ? ((struct alpha_elf_link_hash_table *) ((p)->hash)) : NULL)
/* Get the object's symbols as our own entry type. */
#define alpha_elf_sym_hashes(abfd) \
((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
-/* Should we do dynamic things to this symbol? */
+/* Should we do dynamic things to this symbol? This differs from the
+ generic version in that we never need to consider function pointer
+ equality wrt PLT entries -- we don't create a PLT entry if a symbol's
+ address is ever taken. */
-static int
-alpha_elf_dynamic_symbol_p (h, info)
- struct elf_link_hash_entry *h;
- struct bfd_link_info *info;
+static inline bfd_boolean
+alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry *h,
+ struct bfd_link_info *info)
{
- if (h == NULL)
- return false;
-
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- if (h->dynindx == -1)
- return false;
-
- if (h->root.type == bfd_link_hash_undefweak
- || h->root.type == bfd_link_hash_defweak)
- return true;
-
- switch (ELF_ST_VISIBILITY (h->other))
- {
- case STV_DEFAULT:
- break;
- case STV_HIDDEN:
- case STV_INTERNAL:
- return false;
- case STV_PROTECTED:
- if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
- return false;
- break;
- }
-
- if ((info->shared && !info->symbolic)
- || ((h->elf_link_hash_flags
- & (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR))
- == (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)))
- return true;
-
- return false;
+ return _bfd_elf_dynamic_symbol_p (h, info, 0);
}
/* Create an entry in a Alpha ELF linker hash table. */
static struct bfd_hash_entry *
-elf64_alpha_link_hash_newfunc (entry, table, string)
- struct bfd_hash_entry *entry;
- struct bfd_hash_table *table;
- const char *string;
+elf64_alpha_link_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
{
struct alpha_elf_link_hash_entry *ret =
(struct alpha_elf_link_hash_entry *) entry;
/* Create a Alpha ELF linker hash table. */
static struct bfd_link_hash_table *
-elf64_alpha_bfd_link_hash_table_create (abfd)
- bfd *abfd;
+elf64_alpha_bfd_link_hash_table_create (bfd *abfd)
{
struct alpha_elf_link_hash_table *ret;
bfd_size_type amt = sizeof (struct alpha_elf_link_hash_table);
if (ret == (struct alpha_elf_link_hash_table *) NULL)
return NULL;
- if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
- elf64_alpha_link_hash_newfunc))
+ if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
+ elf64_alpha_link_hash_newfunc,
+ sizeof (struct alpha_elf_link_hash_entry),
+ ALPHA_ELF_DATA))
{
free (ret);
return NULL;
#define alpha_elf_tdata(abfd) \
((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
-static boolean
-elf64_alpha_mkobject (abfd)
- bfd *abfd;
+#define is_alpha_elf(bfd) \
+ (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
+ && elf_tdata (bfd) != NULL \
+ && elf_object_id (bfd) == ALPHA_ELF_DATA)
+
+static bfd_boolean
+elf64_alpha_mkobject (bfd *abfd)
{
- bfd_size_type amt = sizeof (struct alpha_elf_obj_tdata);
- abfd->tdata.any = bfd_zalloc (abfd, amt);
- if (abfd->tdata.any == NULL)
- return false;
- return true;
+ return bfd_elf_allocate_object (abfd, sizeof (struct alpha_elf_obj_tdata),
+ ALPHA_ELF_DATA);
}
-static boolean
-elf64_alpha_object_p (abfd)
- bfd *abfd;
+static bfd_boolean
+elf64_alpha_object_p (bfd *abfd)
{
- /* Allocate our special target data. */
- struct alpha_elf_obj_tdata *new_tdata;
- bfd_size_type amt = sizeof (struct alpha_elf_obj_tdata);
- new_tdata = bfd_zalloc (abfd, amt);
- if (new_tdata == NULL)
- return false;
- new_tdata->root = *abfd->tdata.elf_obj_data;
- abfd->tdata.any = new_tdata;
-
/* Set the right machine number for an Alpha ELF file. */
return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
}
\f
+/* A relocation function which doesn't do anything. */
+
+static bfd_reloc_status_type
+elf64_alpha_reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
+ asymbol *sym ATTRIBUTE_UNUSED,
+ PTR data ATTRIBUTE_UNUSED, asection *sec,
+ bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
+{
+ if (output_bfd)
+ reloc->address += sec->output_offset;
+ return bfd_reloc_ok;
+}
+
+/* A relocation function used for an unsupported reloc. */
+
+static bfd_reloc_status_type
+elf64_alpha_reloc_bad (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
+ asymbol *sym ATTRIBUTE_UNUSED,
+ PTR data ATTRIBUTE_UNUSED, asection *sec,
+ bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
+{
+ if (output_bfd)
+ reloc->address += sec->output_offset;
+ return bfd_reloc_notsupported;
+}
+
+/* Do the work of the GPDISP relocation. */
+
+static bfd_reloc_status_type
+elf64_alpha_do_reloc_gpdisp (bfd *abfd, bfd_vma gpdisp, bfd_byte *p_ldah,
+ bfd_byte *p_lda)
+{
+ bfd_reloc_status_type ret = bfd_reloc_ok;
+ bfd_vma addend;
+ unsigned long i_ldah, i_lda;
+
+ i_ldah = bfd_get_32 (abfd, p_ldah);
+ i_lda = bfd_get_32 (abfd, p_lda);
+
+ /* Complain if the instructions are not correct. */
+ if (((i_ldah >> 26) & 0x3f) != 0x09
+ || ((i_lda >> 26) & 0x3f) != 0x08)
+ ret = bfd_reloc_dangerous;
+
+ /* Extract the user-supplied offset, mirroring the sign extensions
+ that the instructions perform. */
+ addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
+ addend = (addend ^ 0x80008000) - 0x80008000;
+
+ gpdisp += addend;
+
+ if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
+ || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
+ ret = bfd_reloc_overflow;
+
+ /* compensate for the sign extension again. */
+ i_ldah = ((i_ldah & 0xffff0000)
+ | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
+ i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
+
+ bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah);
+ bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda);
+
+ return ret;
+}
+
+/* The special function for the GPDISP reloc. */
+
+static bfd_reloc_status_type
+elf64_alpha_reloc_gpdisp (bfd *abfd, arelent *reloc_entry,
+ asymbol *sym ATTRIBUTE_UNUSED, PTR data,
+ asection *input_section, bfd *output_bfd,
+ char **err_msg)
+{
+ bfd_reloc_status_type ret;
+ bfd_vma gp, relocation;
+ bfd_vma high_address;
+ bfd_byte *p_ldah, *p_lda;
+
+ /* Don't do anything if we're not doing a final link. */
+ if (output_bfd)
+ {
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
+ }
+
+ high_address = bfd_get_section_limit (abfd, input_section);
+ if (reloc_entry->address > high_address
+ || reloc_entry->address + reloc_entry->addend > high_address)
+ return bfd_reloc_outofrange;
+
+ /* The gp used in the portion of the output object to which this
+ input object belongs is cached on the input bfd. */
+ gp = _bfd_get_gp_value (abfd);
+
+ relocation = (input_section->output_section->vma
+ + input_section->output_offset
+ + reloc_entry->address);
+
+ p_ldah = (bfd_byte *) data + reloc_entry->address;
+ p_lda = p_ldah + reloc_entry->addend;
+
+ ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
+
+ /* Complain if the instructions are not correct. */
+ if (ret == bfd_reloc_dangerous)
+ *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
+
+ return ret;
+}
+
/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
from smaller values. Start with zero, widen, *then* decrement. */
#define MINUS_ONE (((bfd_vma)0) - 1)
+
#define SKIP_HOWTO(N) \
- HOWTO(N, 0, 0, 0, 0, 0, 0, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
+ HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
static reloc_howto_type elf64_alpha_howto_table[] =
{
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_nil, /* special_function */
"NONE", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* A 32 bit reference to a symbol. */
HOWTO (R_ALPHA_REFLONG, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"REFLONG", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 64 bit reference to a symbol. */
HOWTO (R_ALPHA_REFQUAD, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"REFQUAD", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 32 bit GP relative offset. This is just like REFLONG except
that when the value is used the value of the gp register will be
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GPREL32", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Used for an instruction that refers to memory off the GP register. */
HOWTO (R_ALPHA_LITERAL, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"ELF_LITERAL", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* This reloc only appears immediately following an ELF_LITERAL reloc.
It identifies a use of the literal. The symbol index is special:
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_nil, /* special_function */
"LITUSE", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Load the gp register. This is always used for a ldah instruction
which loads the upper 16 bits of the gp register. The symbol
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_gpdisp, /* special_function */
"GPDISP", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* A 21 bit branch. */
HOWTO (R_ALPHA_BRADDR, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
21, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"BRADDR", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x1fffff, /* src_mask */
0x1fffff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* A hint for a jump to a register. */
HOWTO (R_ALPHA_HINT, /* type */
2, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
14, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"HINT", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x3fff, /* src_mask */
0x3fff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* 16 bit PC relative offset. */
HOWTO (R_ALPHA_SREL16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"SREL16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* 32 bit PC relative offset. */
HOWTO (R_ALPHA_SREL32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"SREL32", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* A 64 bit PC relative offset. */
HOWTO (R_ALPHA_SREL64, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"SREL64", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* Skip 12 - 16; deprecated ECOFF relocs. */
SKIP_HOWTO (12),
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GPRELHIGH", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* The low 16 bits of the displacement from GP to the target. */
HOWTO (R_ALPHA_GPRELLOW,
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GPRELLOW", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 16-bit displacement from the GP to the target. */
HOWTO (R_ALPHA_GPREL16,
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GPREL16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Skip 20 - 23; deprecated ECOFF relocs. */
SKIP_HOWTO (20),
0,
0,
0,
- false,
+ FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"COPY",
- false,
+ FALSE,
0,
0,
- true),
+ TRUE),
/* A dynamic relocation for a .got entry. */
HOWTO (R_ALPHA_GLOB_DAT,
0,
0,
0,
- false,
+ FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"GLOB_DAT",
- false,
+ FALSE,
0,
0,
- true),
+ TRUE),
/* A dynamic relocation for a .plt entry. */
HOWTO (R_ALPHA_JMP_SLOT,
0,
0,
0,
- false,
+ FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"JMP_SLOT",
- false,
+ FALSE,
0,
0,
- true),
+ TRUE),
/* A dynamic relocation to add the base of the DSO to a 64-bit field. */
HOWTO (R_ALPHA_RELATIVE,
0,
0,
0,
- false,
+ FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"RELATIVE",
- false,
+ FALSE,
0,
0,
- true),
+ TRUE),
/* A 21 bit branch that adjusts for gp loads. */
HOWTO (R_ALPHA_BRSGP, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
21, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"BRSGP", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x1fffff, /* src_mask */
0x1fffff, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* Creates a tls_index for the symbol in the got. */
HOWTO (R_ALPHA_TLSGD, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TLSGD", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Creates a tls_index for the (current) module in the got. */
HOWTO (R_ALPHA_TLSLDM, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TLSLDM", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A dynamic relocation for a DTP module entry. */
HOWTO (R_ALPHA_DTPMOD64, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"DTPMOD64", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Creates a 64-bit offset in the got for the displacement
from DTP to the target. */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GOTDTPREL", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A dynamic relocation for a displacement from DTP to the target. */
HOWTO (R_ALPHA_DTPREL64, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"DTPREL64", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* The high 16 bits of the displacement from DTP to the target. */
HOWTO (R_ALPHA_DTPRELHI, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"DTPRELHI", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* The low 16 bits of the displacement from DTP to the target. */
HOWTO (R_ALPHA_DTPRELLO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"DTPRELLO", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 16-bit displacement from DTP to the target. */
HOWTO (R_ALPHA_DTPREL16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"DTPREL16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* Creates a 64-bit offset in the got for the displacement
from TP to the target. */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"GOTTPREL", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A dynamic relocation for a displacement from TP to the target. */
HOWTO (R_ALPHA_TPREL64, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TPREL64", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* The high 16 bits of the displacement from TP to the target. */
HOWTO (R_ALPHA_TPRELHI, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TPRELHI", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* The low 16 bits of the displacement from TP to the target. */
HOWTO (R_ALPHA_TPRELLO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TPRELLO", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 16-bit displacement from TP to the target. */
HOWTO (R_ALPHA_TPREL16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- 0, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"TPREL16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
};
-/* A relocation function which doesn't do anything. */
+/* A mapping from BFD reloc types to Alpha ELF reloc types. */
-static bfd_reloc_status_type
-elf64_alpha_reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *reloc;
- asymbol *sym ATTRIBUTE_UNUSED;
- PTR data ATTRIBUTE_UNUSED;
- asection *sec;
- bfd *output_bfd;
- char **error_message ATTRIBUTE_UNUSED;
+struct elf_reloc_map
{
- if (output_bfd)
- reloc->address += sec->output_offset;
- return bfd_reloc_ok;
-}
+ bfd_reloc_code_real_type bfd_reloc_val;
+ int elf_reloc_val;
+};
-/* A relocation function used for an unsupported reloc. */
+static const struct elf_reloc_map elf64_alpha_reloc_map[] =
+{
+ {BFD_RELOC_NONE, R_ALPHA_NONE},
+ {BFD_RELOC_32, R_ALPHA_REFLONG},
+ {BFD_RELOC_64, R_ALPHA_REFQUAD},
+ {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
+ {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
+ {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
+ {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
+ {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
+ {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
+ {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
+ {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
+ {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
+ {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
+ {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH},
+ {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW},
+ {BFD_RELOC_GPREL16, R_ALPHA_GPREL16},
+ {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP},
+ {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD},
+ {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM},
+ {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64},
+ {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL},
+ {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64},
+ {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI},
+ {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO},
+ {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16},
+ {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL},
+ {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64},
+ {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI},
+ {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO},
+ {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16},
+};
-static bfd_reloc_status_type
-elf64_alpha_reloc_bad (abfd, reloc, sym, data, sec, output_bfd, error_message)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *reloc;
- asymbol *sym ATTRIBUTE_UNUSED;
- PTR data ATTRIBUTE_UNUSED;
- asection *sec;
- bfd *output_bfd;
- char **error_message ATTRIBUTE_UNUSED;
+/* Given a BFD reloc type, return a HOWTO structure. */
+
+static reloc_howto_type *
+elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
{
- if (output_bfd)
- reloc->address += sec->output_offset;
- return bfd_reloc_notsupported;
+ const struct elf_reloc_map *i, *e;
+ i = e = elf64_alpha_reloc_map;
+ e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
+ for (; i != e; ++i)
+ {
+ if (i->bfd_reloc_val == code)
+ return &elf64_alpha_howto_table[i->elf_reloc_val];
+ }
+ return 0;
}
-/* Do the work of the GPDISP relocation. */
-
-static bfd_reloc_status_type
-elf64_alpha_do_reloc_gpdisp (abfd, gpdisp, p_ldah, p_lda)
- bfd *abfd;
- bfd_vma gpdisp;
- bfd_byte *p_ldah;
- bfd_byte *p_lda;
+static reloc_howto_type *
+elf64_alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ const char *r_name)
{
- bfd_reloc_status_type ret = bfd_reloc_ok;
- bfd_vma addend;
- unsigned long i_ldah, i_lda;
+ unsigned int i;
- i_ldah = bfd_get_32 (abfd, p_ldah);
- i_lda = bfd_get_32 (abfd, p_lda);
+ for (i = 0;
+ i < (sizeof (elf64_alpha_howto_table)
+ / sizeof (elf64_alpha_howto_table[0]));
+ i++)
+ if (elf64_alpha_howto_table[i].name != NULL
+ && strcasecmp (elf64_alpha_howto_table[i].name, r_name) == 0)
+ return &elf64_alpha_howto_table[i];
- /* Complain if the instructions are not correct. */
- if (((i_ldah >> 26) & 0x3f) != 0x09
- || ((i_lda >> 26) & 0x3f) != 0x08)
- ret = bfd_reloc_dangerous;
+ return NULL;
+}
- /* Extract the user-supplied offset, mirroring the sign extensions
- that the instructions perform. */
- addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
- addend = (addend ^ 0x80008000) - 0x80008000;
+/* Given an Alpha ELF reloc type, fill in an arelent structure. */
- gpdisp += addend;
+static void
+elf64_alpha_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
+ Elf_Internal_Rela *dst)
+{
+ unsigned r_type = ELF64_R_TYPE(dst->r_info);
+ BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
+ cache_ptr->howto = &elf64_alpha_howto_table[r_type];
+}
- if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
- || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
- ret = bfd_reloc_overflow;
-
- /* compensate for the sign extension again. */
- i_ldah = ((i_ldah & 0xffff0000)
- | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
- i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
-
- bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah);
- bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda);
+/* These two relocations create a two-word entry in the got. */
+#define alpha_got_entry_size(r_type) \
+ (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
- return ret;
-}
+/* This is PT_TLS segment p_vaddr. */
+#define alpha_get_dtprel_base(info) \
+ (elf_hash_table (info)->tls_sec->vma)
-/* The special function for the GPDISP reloc. */
+/* Main program TLS (whose template starts at PT_TLS p_vaddr)
+ is assigned offset round(16, PT_TLS p_align). */
+#define alpha_get_tprel_base(info) \
+ (elf_hash_table (info)->tls_sec->vma \
+ - align_power ((bfd_vma) 16, \
+ elf_hash_table (info)->tls_sec->alignment_power))
+\f
+/* Handle an Alpha specific section when reading an object file. This
+ is called when bfd_section_from_shdr finds a section with an unknown
+ type.
+ FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure
+ how to. */
-static bfd_reloc_status_type
-elf64_alpha_reloc_gpdisp (abfd, reloc_entry, sym, data, input_section,
- output_bfd, err_msg)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *sym ATTRIBUTE_UNUSED;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **err_msg;
+static bfd_boolean
+elf64_alpha_section_from_shdr (bfd *abfd,
+ Elf_Internal_Shdr *hdr,
+ const char *name,
+ int shindex)
{
- bfd_reloc_status_type ret;
- bfd_vma gp, relocation;
- bfd_byte *p_ldah, *p_lda;
+ asection *newsect;
- /* Don't do anything if we're not doing a final link. */
- if (output_bfd)
+ /* There ought to be a place to keep ELF backend specific flags, but
+ at the moment there isn't one. We just keep track of the
+ sections by their name, instead. Fortunately, the ABI gives
+ suggested names for all the MIPS specific sections, so we will
+ probably get away with this. */
+ switch (hdr->sh_type)
{
- reloc_entry->address += input_section->output_offset;
- return bfd_reloc_ok;
+ case SHT_ALPHA_DEBUG:
+ if (strcmp (name, ".mdebug") != 0)
+ return FALSE;
+ break;
+ default:
+ return FALSE;
}
- if (reloc_entry->address > input_section->_cooked_size ||
- reloc_entry->address + reloc_entry->addend > input_section->_cooked_size)
- return bfd_reloc_outofrange;
-
- /* The gp used in the portion of the output object to which this
- input object belongs is cached on the input bfd. */
- gp = _bfd_get_gp_value (abfd);
+ if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
+ return FALSE;
+ newsect = hdr->bfd_section;
- relocation = (input_section->output_section->vma
- + input_section->output_offset
- + reloc_entry->address);
+ if (hdr->sh_type == SHT_ALPHA_DEBUG)
+ {
+ if (! bfd_set_section_flags (abfd, newsect,
+ (bfd_get_section_flags (abfd, newsect)
+ | SEC_DEBUGGING)))
+ return FALSE;
+ }
- p_ldah = (bfd_byte *) data + reloc_entry->address;
- p_lda = p_ldah + reloc_entry->addend;
+ return TRUE;
+}
- ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
+/* Convert Alpha specific section flags to bfd internal section flags. */
- /* Complain if the instructions are not correct. */
- if (ret == bfd_reloc_dangerous)
- *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
+static bfd_boolean
+elf64_alpha_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
+{
+ if (hdr->sh_flags & SHF_ALPHA_GPREL)
+ *flags |= SEC_SMALL_DATA;
- return ret;
+ return TRUE;
}
-/* A mapping from BFD reloc types to Alpha ELF reloc types. */
-
-struct elf_reloc_map
-{
- bfd_reloc_code_real_type bfd_reloc_val;
- int elf_reloc_val;
-};
+/* Set the correct type for an Alpha ELF section. We do this by the
+ section name, which is a hack, but ought to work. */
-static const struct elf_reloc_map elf64_alpha_reloc_map[] =
+static bfd_boolean
+elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec)
{
- {BFD_RELOC_NONE, R_ALPHA_NONE},
- {BFD_RELOC_32, R_ALPHA_REFLONG},
- {BFD_RELOC_64, R_ALPHA_REFQUAD},
- {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
- {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
- {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
- {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
- {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
- {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
- {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
- {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
- {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
- {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
- {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH},
- {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW},
- {BFD_RELOC_GPREL16, R_ALPHA_GPREL16},
- {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP},
- {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD},
- {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM},
- {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64},
- {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL},
- {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64},
- {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI},
- {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO},
- {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16},
- {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL},
- {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64},
- {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI},
- {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO},
- {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16},
-};
+ register const char *name;
-/* Given a BFD reloc type, return a HOWTO structure. */
+ name = bfd_get_section_name (abfd, sec);
-static reloc_howto_type *
-elf64_alpha_bfd_reloc_type_lookup (abfd, code)
- bfd *abfd ATTRIBUTE_UNUSED;
- bfd_reloc_code_real_type code;
-{
- const struct elf_reloc_map *i, *e;
- i = e = elf64_alpha_reloc_map;
- e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
- for (; i != e; ++i)
+ if (strcmp (name, ".mdebug") == 0)
{
- if (i->bfd_reloc_val == code)
- return &elf64_alpha_howto_table[i->elf_reloc_val];
+ hdr->sh_type = SHT_ALPHA_DEBUG;
+ /* In a shared object on Irix 5.3, the .mdebug section has an
+ entsize of 0. FIXME: Does this matter? */
+ if ((abfd->flags & DYNAMIC) != 0 )
+ hdr->sh_entsize = 0;
+ else
+ hdr->sh_entsize = 1;
}
- return 0;
+ else if ((sec->flags & SEC_SMALL_DATA)
+ || strcmp (name, ".sdata") == 0
+ || strcmp (name, ".sbss") == 0
+ || strcmp (name, ".lit4") == 0
+ || strcmp (name, ".lit8") == 0)
+ hdr->sh_flags |= SHF_ALPHA_GPREL;
+
+ return TRUE;
}
-/* Given an Alpha ELF reloc type, fill in an arelent structure. */
+/* Hook called by the linker routine which adds symbols from an object
+ file. We use it to put .comm items in .sbss, and not .bss. */
-static void
-elf64_alpha_info_to_howto (abfd, cache_ptr, dst)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *cache_ptr;
- Elf_Internal_Rela *dst;
+static bfd_boolean
+elf64_alpha_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
+ Elf_Internal_Sym *sym,
+ const char **namep ATTRIBUTE_UNUSED,
+ flagword *flagsp ATTRIBUTE_UNUSED,
+ asection **secp, bfd_vma *valp)
{
- unsigned r_type;
+ if (sym->st_shndx == SHN_COMMON
+ && !info->relocatable
+ && sym->st_size <= elf_gp_size (abfd))
+ {
+ /* Common symbols less than or equal to -G nn bytes are
+ automatically put into .sbss. */
- r_type = ELF64_R_TYPE(dst->r_info);
- BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
- cache_ptr->howto = &elf64_alpha_howto_table[r_type];
-}
+ asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
-/* These two relocations create a two-word entry in the got. */
-#define alpha_got_entry_size(r_type) \
- (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
+ if (scomm == NULL)
+ {
+ scomm = bfd_make_section_with_flags (abfd, ".scommon",
+ (SEC_ALLOC
+ | SEC_IS_COMMON
+ | SEC_LINKER_CREATED));
+ if (scomm == NULL)
+ return FALSE;
+ }
-/* This is PT_TLS segment p_vaddr. */
-#define alpha_get_dtprel_base(tlss) \
- ((tlss)->start)
+ *secp = scomm;
+ *valp = sym->st_size;
+ }
-/* Main program TLS (whose template starts at PT_TLS p_vaddr)
- is assigned offset round(16, PT_TLS p_align). */
-#define alpha_get_tprel_base(tlss) \
- ((tlss)->start - align_power ((bfd_vma) 16, (tlss)->align))
-\f
-/* These functions do relaxation for Alpha ELF.
+ return TRUE;
+}
- Currently I'm only handling what I can do with existing compiler
- and assembler support, which means no instructions are removed,
- though some may be nopped. At this time GCC does not emit enough
- information to do all of the relaxing that is possible. It will
- take some not small amount of work for that to happen.
+/* Create the .got section. */
- There are a couple of interesting papers that I once read on this
- subject, that I cannot find references to at the moment, that
- related to Alpha in particular. They are by David Wall, then of
- DEC WRL. */
+static bfd_boolean
+elf64_alpha_create_got_section (bfd *abfd,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED)
+{
+ flagword flags;
+ asection *s;
-#define OP_LDA 0x08
-#define OP_LDAH 0x09
-#define INSN_JSR 0x68004000
-#define INSN_JSR_MASK 0xfc00c000
-#define OP_LDQ 0x29
-#define OP_BR 0x30
-#define OP_BSR 0x34
-#define INSN_UNOP 0x2ffe0000
-#define INSN_ADDQ 0x40000400
-#define INSN_RDUNIQ 0x0000009e
+ if (! is_alpha_elf (abfd))
+ return FALSE;
-struct alpha_relax_info
-{
- bfd *abfd;
- asection *sec;
- bfd_byte *contents;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Rela *relocs, *relend;
- struct bfd_link_info *link_info;
- struct elf_link_tls_segment *tls_segment;
- bfd_vma gp;
- bfd *gotobj;
- asection *tsec;
- struct alpha_elf_link_hash_entry *h;
- struct alpha_elf_got_entry **first_gotent;
- struct alpha_elf_got_entry *gotent;
- boolean changed_contents;
- boolean changed_relocs;
- unsigned char other;
-};
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
+ s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
+ if (s == NULL
+ || !bfd_set_section_alignment (abfd, s, 3))
+ return FALSE;
-static boolean elf64_alpha_relax_with_lituse
- PARAMS((struct alpha_relax_info *info, bfd_vma symval,
- Elf_Internal_Rela *irel));
-static bfd_vma elf64_alpha_relax_opt_call
- PARAMS((struct alpha_relax_info *info, bfd_vma symval));
-static boolean elf64_alpha_relax_got_load
- PARAMS((struct alpha_relax_info *info, bfd_vma symval,
- Elf_Internal_Rela *irel, unsigned long));
-static boolean elf64_alpha_relax_gprelhilo
- PARAMS((struct alpha_relax_info *info, bfd_vma symval,
- Elf_Internal_Rela *irel, boolean));
-static boolean elf64_alpha_relax_tls_get_addr
- PARAMS((struct alpha_relax_info *info, bfd_vma symval,
- Elf_Internal_Rela *irel, boolean));
-static struct elf_link_tls_segment *elf64_alpha_relax_find_tls_segment
- PARAMS((struct alpha_relax_info *, struct elf_link_tls_segment *));
-static boolean elf64_alpha_relax_section
- PARAMS((bfd *abfd, asection *sec, struct bfd_link_info *link_info,
- boolean *again));
+ alpha_elf_tdata (abfd)->got = s;
-static Elf_Internal_Rela *
-elf64_alpha_find_reloc_at_ofs (rel, relend, offset, type)
- Elf_Internal_Rela *rel, *relend;
- bfd_vma offset;
- int type;
-{
- while (rel < relend)
- {
- if (rel->r_offset == offset
- && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
- return rel;
- ++rel;
- }
- return NULL;
+ /* Make sure the object's gotobj is set to itself so that we default
+ to every object with its own .got. We'll merge .gots later once
+ we've collected each object's info. */
+ alpha_elf_tdata (abfd)->gotobj = abfd;
+
+ return TRUE;
}
-static boolean
-elf64_alpha_relax_with_lituse (info, symval, irel)
- struct alpha_relax_info *info;
- bfd_vma symval;
- Elf_Internal_Rela *irel;
+/* Create all the dynamic sections. */
+
+static bfd_boolean
+elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
{
- Elf_Internal_Rela *urel, *irelend = info->relend;
- int flags, count, i;
- bfd_signed_vma disp;
- boolean fits16;
- boolean fits32;
- boolean lit_reused = false;
- boolean all_optimized = true;
- unsigned int lit_insn;
+ asection *s;
+ flagword flags;
+ struct elf_link_hash_entry *h;
- lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
- if (lit_insn >> 26 != OP_LDQ)
- {
- ((*_bfd_error_handler)
- ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn",
- bfd_archive_filename (info->abfd), info->sec->name,
- (unsigned long) irel->r_offset));
- return true;
- }
+ if (! is_alpha_elf (abfd))
+ return FALSE;
- /* Can't relax dynamic symbols. */
- if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
- return true;
+ /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
- /* Summarize how this particular LITERAL is used. */
- for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count)
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED
+ | (elf64_alpha_use_secureplt ? SEC_READONLY : 0));
+ s = bfd_make_section_anyway_with_flags (abfd, ".plt", flags);
+ if (s == NULL || ! bfd_set_section_alignment (abfd, s, 4))
+ return FALSE;
+
+ /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
+ .plt section. */
+ h = _bfd_elf_define_linkage_sym (abfd, info, s,
+ "_PROCEDURE_LINKAGE_TABLE_");
+ elf_hash_table (info)->hplt = h;
+ if (h == NULL)
+ return FALSE;
+
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED | SEC_READONLY);
+ s = bfd_make_section_anyway_with_flags (abfd, ".rela.plt", flags);
+ if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3))
+ return FALSE;
+
+ if (elf64_alpha_use_secureplt)
{
- if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE)
- break;
- if (urel->r_addend <= 3)
- flags |= 1 << urel->r_addend;
+ flags = SEC_ALLOC | SEC_LINKER_CREATED;
+ s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
+ if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3))
+ return FALSE;
}
- /* A little preparation for the loop... */
- disp = symval - info->gp;
+ /* We may or may not have created a .got section for this object, but
+ we definitely havn't done the rest of the work. */
- for (urel = irel+1, i = 0; i < count; ++i, ++urel)
+ if (alpha_elf_tdata(abfd)->gotobj == NULL)
{
- unsigned int insn;
- int insn_disp;
- bfd_signed_vma xdisp;
+ if (!elf64_alpha_create_got_section (abfd, info))
+ return FALSE;
+ }
- insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset);
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED | SEC_READONLY);
+ s = bfd_make_section_anyway_with_flags (abfd, ".rela.got", flags);
+ if (s == NULL
+ || !bfd_set_section_alignment (abfd, s, 3))
+ return FALSE;
- switch (urel->r_addend)
- {
- case LITUSE_ALPHA_ADDR:
- default:
- /* This type is really just a placeholder to note that all
- uses cannot be optimized, but to still allow some. */
- all_optimized = false;
- break;
-
- case LITUSE_ALPHA_BASE:
- /* We can always optimize 16-bit displacements. */
-
- /* Extract the displacement from the instruction, sign-extending
- it if necessary, then test whether it is within 16 or 32 bits
- displacement from GP. */
- insn_disp = insn & 0x0000ffff;
- if (insn_disp & 0x8000)
- insn_disp |= ~0xffff; /* Negative: sign-extend. */
-
- xdisp = disp + insn_disp;
- fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000);
- fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000
- && xdisp < 0x7fff8000);
-
- if (fits16)
- {
- /* Take the op code and dest from this insn, take the base
- register from the literal insn. Leave the offset alone. */
- insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
- urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPREL16);
- urel->r_addend = irel->r_addend;
- info->changed_relocs = true;
-
- bfd_put_32 (info->abfd, (bfd_vma) insn,
- info->contents + urel->r_offset);
- info->changed_contents = true;
- }
-
- /* If all mem+byte, we can optimize 32-bit mem displacements. */
- else if (fits32 && !(flags & ~6))
- {
- /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
-
- irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPRELHIGH);
- lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
- bfd_put_32 (info->abfd, (bfd_vma) lit_insn,
- info->contents + irel->r_offset);
- lit_reused = true;
- info->changed_contents = true;
-
- urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPRELLOW);
- urel->r_addend = irel->r_addend;
- info->changed_relocs = true;
- }
- else
- all_optimized = false;
- break;
-
- case LITUSE_ALPHA_BYTOFF:
- /* We can always optimize byte instructions. */
-
- /* FIXME: sanity check the insn for byte op. Check that the
- literal dest reg is indeed Rb in the byte insn. */
-
- insn &= ~ (unsigned) 0x001ff000;
- insn |= ((symval & 7) << 13) | 0x1000;
-
- urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- urel->r_addend = 0;
- info->changed_relocs = true;
-
- bfd_put_32 (info->abfd, (bfd_vma) insn,
- info->contents + urel->r_offset);
- info->changed_contents = true;
- break;
-
- case LITUSE_ALPHA_JSR:
- case LITUSE_ALPHA_TLSGD:
- case LITUSE_ALPHA_TLSLDM:
- {
- bfd_vma optdest, org;
- bfd_signed_vma odisp;
-
- /* If not zero, place to jump without needing pv. */
- optdest = elf64_alpha_relax_opt_call (info, symval);
- org = (info->sec->output_section->vma
- + info->sec->output_offset
- + urel->r_offset + 4);
- odisp = (optdest ? optdest : symval) - org;
-
- if (odisp >= -0x400000 && odisp < 0x400000)
- {
- Elf_Internal_Rela *xrel;
-
- /* Preserve branch prediction call stack when possible. */
- if ((insn & INSN_JSR_MASK) == INSN_JSR)
- insn = (OP_BSR << 26) | (insn & 0x03e00000);
- else
- insn = (OP_BR << 26) | (insn & 0x03e00000);
-
- urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_BRADDR);
- urel->r_addend = irel->r_addend;
-
- if (optdest)
- urel->r_addend += optdest - symval;
- else
- all_optimized = false;
-
- bfd_put_32 (info->abfd, (bfd_vma) insn,
- info->contents + urel->r_offset);
-
- /* Kill any HINT reloc that might exist for this insn. */
- xrel = (elf64_alpha_find_reloc_at_ofs
- (info->relocs, info->relend, urel->r_offset,
- R_ALPHA_HINT));
- if (xrel)
- xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
-
- info->changed_contents = true;
- info->changed_relocs = true;
- }
- else
- all_optimized = false;
-
- /* Even if the target is not in range for a direct branch,
- if we share a GP, we can eliminate the gp reload. */
- if (optdest)
- {
- Elf_Internal_Rela *gpdisp
- = (elf64_alpha_find_reloc_at_ofs
- (info->relocs, irelend, urel->r_offset + 4,
- R_ALPHA_GPDISP));
- if (gpdisp)
- {
- bfd_byte *p_ldah = info->contents + gpdisp->r_offset;
- bfd_byte *p_lda = p_ldah + gpdisp->r_addend;
- unsigned int ldah = bfd_get_32 (info->abfd, p_ldah);
- unsigned int lda = bfd_get_32 (info->abfd, p_lda);
-
- /* Verify that the instruction is "ldah $29,0($26)".
- Consider a function that ends in a noreturn call,
- and that the next function begins with an ldgp,
- and that by accident there is no padding between.
- In that case the insn would use $27 as the base. */
- if (ldah == 0x27ba0000 && lda == 0x23bd0000)
- {
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah);
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda);
-
- gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- info->changed_contents = true;
- info->changed_relocs = true;
- }
- }
- }
- }
- break;
- }
- }
-
- /* If all cases were optimized, we can reduce the use count on this
- got entry by one, possibly eliminating it. */
- if (all_optimized)
- {
- if (--info->gotent->use_count == 0)
- {
- int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
- alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
- if (!info->h)
- alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
- }
-
- /* If the literal instruction is no longer needed (it may have been
- reused. We can eliminate it. */
- /* ??? For now, I don't want to deal with compacting the section,
- so just nop it out. */
- if (!lit_reused)
- {
- irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- info->changed_relocs = true;
-
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP,
- info->contents + irel->r_offset);
- info->changed_contents = true;
- }
- }
-
- return true;
-}
-
-static bfd_vma
-elf64_alpha_relax_opt_call (info, symval)
- struct alpha_relax_info *info;
- bfd_vma symval;
-{
- /* If the function has the same gp, and we can identify that the
- function does not use its function pointer, we can eliminate the
- address load. */
-
- /* If the symbol is marked NOPV, we are being told the function never
- needs its procedure value. */
- if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV)
- return symval;
-
- /* If the symbol is marked STD_GP, we are being told the function does
- a normal ldgp in the first two words. */
- else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD)
- ;
-
- /* Otherwise, we may be able to identify a GP load in the first two
- words, which we can then skip. */
- else
- {
- Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
- bfd_vma ofs;
-
- /* Load the relocations from the section that the target symbol is in. */
- if (info->sec == info->tsec)
- {
- tsec_relocs = info->relocs;
- tsec_relend = info->relend;
- tsec_free = NULL;
- }
- else
- {
- tsec_relocs = (_bfd_elf64_link_read_relocs
- (info->abfd, info->tsec, (PTR) NULL,
- (Elf_Internal_Rela *) NULL,
- info->link_info->keep_memory));
- if (tsec_relocs == NULL)
- return 0;
- tsec_relend = tsec_relocs + info->tsec->reloc_count;
- tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
- }
-
- /* Recover the symbol's offset within the section. */
- ofs = (symval - info->tsec->output_section->vma
- - info->tsec->output_offset);
-
- /* Look for a GPDISP reloc. */
- gpdisp = (elf64_alpha_find_reloc_at_ofs
- (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
-
- if (!gpdisp || gpdisp->r_addend != 4)
- {
- if (tsec_free)
- free (tsec_free);
- return 0;
- }
- if (tsec_free)
- free (tsec_free);
- }
-
- /* We've now determined that we can skip an initial gp load. Verify
- that the call and the target use the same gp. */
- if (info->link_info->hash->creator != info->tsec->owner->xvec
- || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj)
- return 0;
-
- return symval + 8;
-}
-
-static boolean
-elf64_alpha_relax_got_load (info, symval, irel, r_type)
- struct alpha_relax_info *info;
- bfd_vma symval;
- Elf_Internal_Rela *irel;
- unsigned long r_type;
-{
- unsigned int insn;
- bfd_signed_vma disp;
-
- /* Get the instruction. */
- insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
-
- if (insn >> 26 != OP_LDQ)
- {
- reloc_howto_type *howto = elf64_alpha_howto_table + r_type;
- ((*_bfd_error_handler)
- ("%s: %s+0x%lx: warning: %s relocation against unexpected insn",
- bfd_archive_filename (info->abfd), info->sec->name,
- (unsigned long) irel->r_offset, howto->name));
- return true;
- }
-
- /* Can't relax dynamic symbols. */
- if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
- return true;
-
- /* Can't use local-exec relocations in shared libraries. */
- if (r_type == R_ALPHA_GOTTPREL && info->link_info->shared)
- return true;
-
- if (r_type == R_ALPHA_LITERAL)
- disp = symval - info->gp;
- else
- {
- bfd_vma dtp_base, tp_base;
-
- BFD_ASSERT (info->tls_segment != NULL);
- dtp_base = alpha_get_dtprel_base (info->tls_segment);
- tp_base = alpha_get_tprel_base (info->tls_segment);
- disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
- }
-
- if (disp < -0x8000 || disp >= 0x8000)
- return true;
-
- /* Exchange LDQ for LDA. In the case of the TLS relocs, we're loading
- a constant, so force the base register to be $31. */
- if (r_type == R_ALPHA_LITERAL)
- insn = (OP_LDA << 26) | (insn & 0x03ff0000);
- else
- insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
- info->changed_contents = true;
-
- switch (r_type)
- {
- case R_ALPHA_LITERAL:
- r_type = R_ALPHA_GPREL16;
- break;
- case R_ALPHA_GOTDTPREL:
- r_type = R_ALPHA_DTPREL16;
- break;
- case R_ALPHA_GOTTPREL:
- r_type = R_ALPHA_TPREL16;
- break;
- default:
- BFD_ASSERT (0);
- return false;
- }
-
- irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type);
- info->changed_relocs = true;
-
- /* Reduce the use count on this got entry by one, possibly
- eliminating it. */
- if (--info->gotent->use_count == 0)
- {
- int sz = alpha_got_entry_size (r_type);
- alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
- if (!info->h)
- alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
- }
-
- /* ??? Search forward through this basic block looking for insns
- that use the target register. Stop after an insn modifying the
- register is seen, or after a branch or call.
-
- Any such memory load insn may be substituted by a load directly
- off the GP. This allows the memory load insn to be issued before
- the calculated GP register would otherwise be ready.
-
- Any such jsr insn can be replaced by a bsr if it is in range.
-
- This would mean that we'd have to _add_ relocations, the pain of
- which gives one pause. */
-
- return true;
-}
-
-static boolean
-elf64_alpha_relax_gprelhilo (info, symval, irel, hi)
- struct alpha_relax_info *info;
- bfd_vma symval;
- Elf_Internal_Rela *irel;
- boolean hi;
-{
- unsigned int insn;
- bfd_signed_vma disp;
- bfd_byte *pos = info->contents + irel->r_offset;
-
- /* ??? This assumes that the compiler doesn't render
-
- array[i]
- as
- ldah t, array(gp) !gprelhigh
- s8addl i, t, t
- ldq r, array(t) !gprellow
-
- which would indeed be the most efficient way to implement this. */
-
- return true;
-
- disp = symval - info->gp;
- if (disp < -0x8000 || disp >= 0x8000)
- return true;
-
- if (hi)
- {
- /* Nop out the high instruction. */
-
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos);
- info->changed_contents = true;
-
- irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- irel->r_addend = 0;
- info->changed_relocs = true;
- }
- else
- {
- /* Adjust the low instruction to reference GP directly. */
-
- insn = bfd_get_32 (info->abfd, pos);
- insn = (insn & 0xffe00000) | (29 << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos);
- info->changed_contents = true;
-
- irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPREL16);
- info->changed_relocs = true;
- }
+ /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
+ dynobj's .got section. We don't do this in the linker script
+ because we don't want to define the symbol if we are not creating
+ a global offset table. */
+ h = _bfd_elf_define_linkage_sym (abfd, info, alpha_elf_tdata(abfd)->got,
+ "_GLOBAL_OFFSET_TABLE_");
+ elf_hash_table (info)->hgot = h;
+ if (h == NULL)
+ return FALSE;
- return true;
+ return TRUE;
}
+\f
+/* Read ECOFF debugging information from a .mdebug section into a
+ ecoff_debug_info structure. */
-static boolean
-elf64_alpha_relax_tls_get_addr (info, symval, irel, is_gd)
- struct alpha_relax_info *info;
- bfd_vma symval;
- Elf_Internal_Rela *irel;
- boolean is_gd;
+static bfd_boolean
+elf64_alpha_read_ecoff_info (bfd *abfd, asection *section,
+ struct ecoff_debug_info *debug)
{
- bfd_byte *pos[5];
- unsigned int insn;
- Elf_Internal_Rela *gpdisp, *hint;
- boolean dynamic, use_gottprel;
-
- dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info);
-
- /* ??? For LD relaxation, we need a symbol referencing the beginning
- of the TLS segment. */
- if (!is_gd)
- return true;
-
- /* If a TLS symbol is accessed using IE at least once, there is no point
- to use dynamic model for it. */
- if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE))
- ;
-
- /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
- then we might as well relax to IE. */
- else if (info->link_info->shared && !dynamic
- && (info->link_info->flags & DF_STATIC_TLS))
- ;
+ HDRR *symhdr;
+ const struct ecoff_debug_swap *swap;
+ char *ext_hdr = NULL;
- /* Otherwise we must be building an executable to do anything. */
- else if (info->link_info->shared)
- return true;
+ swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
+ memset (debug, 0, sizeof (*debug));
- /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
- the matching LITUSE_TLS relocations. */
- if (irel + 2 >= info->relend)
- return true;
- if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL
- || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE
- || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM))
- return true;
+ ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
+ if (ext_hdr == NULL && swap->external_hdr_size != 0)
+ goto error_return;
- /* There must be a GPDISP relocation positioned immediately after the
- LITUSE relocation. */
- gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
- irel[2].r_offset + 4, R_ALPHA_GPDISP);
- if (!gpdisp)
- return true;
+ if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
+ swap->external_hdr_size))
+ goto error_return;
- pos[0] = info->contents + irel[0].r_offset;
- pos[1] = info->contents + irel[1].r_offset;
- pos[2] = info->contents + irel[2].r_offset;
- pos[3] = info->contents + gpdisp->r_offset;
- pos[4] = pos[3] + gpdisp->r_addend;
+ symhdr = &debug->symbolic_header;
+ (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
- /* Only positions 0 and 1 are allowed to be out of order. */
- if (pos[1] < pos[0])
- {
- bfd_byte *tmp = pos[0];
- pos[0] = pos[1];
- pos[1] = tmp;
+ /* The symbolic header contains absolute file offsets and sizes to
+ read. */
+#define READ(ptr, offset, count, size, type) \
+ if (symhdr->count == 0) \
+ debug->ptr = NULL; \
+ else \
+ { \
+ bfd_size_type amt = (bfd_size_type) size * symhdr->count; \
+ debug->ptr = (type) bfd_malloc (amt); \
+ if (debug->ptr == NULL) \
+ goto error_return; \
+ if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
+ || bfd_bread (debug->ptr, amt, abfd) != amt) \
+ goto error_return; \
}
- if (pos[1] >= pos[2] || pos[2] >= pos[3] || pos[3] >= pos[4])
- return true;
- /* Reduce the use count on the LITERAL relocation. Do this before we
- smash the symndx when we adjust the relocations below. */
- {
- struct alpha_elf_got_entry *lit_gotent;
- struct alpha_elf_link_hash_entry *lit_h;
- unsigned long indx;
+ READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
+ READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
+ READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
+ READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
+ READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
+ READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
+ union aux_ext *);
+ READ (ss, cbSsOffset, issMax, sizeof (char), char *);
+ READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
+ READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
+ READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
+ READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
+#undef READ
- BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info);
- indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info;
- lit_h = alpha_elf_sym_hashes (info->abfd)[indx];
+ debug->fdr = NULL;
- while (lit_h->root.root.type == bfd_link_hash_indirect
- || lit_h->root.root.type == bfd_link_hash_warning)
- lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link;
+ return TRUE;
- for (lit_gotent = lit_h->got_entries; lit_gotent ;
- lit_gotent = lit_gotent->next)
- if (lit_gotent->gotobj == info->gotobj
- && lit_gotent->reloc_type == R_ALPHA_LITERAL
- && lit_gotent->addend == irel[1].r_addend)
- break;
- BFD_ASSERT (lit_gotent);
+ error_return:
+ if (ext_hdr != NULL)
+ free (ext_hdr);
+ if (debug->line != NULL)
+ free (debug->line);
+ if (debug->external_dnr != NULL)
+ free (debug->external_dnr);
+ if (debug->external_pdr != NULL)
+ free (debug->external_pdr);
+ if (debug->external_sym != NULL)
+ free (debug->external_sym);
+ if (debug->external_opt != NULL)
+ free (debug->external_opt);
+ if (debug->external_aux != NULL)
+ free (debug->external_aux);
+ if (debug->ss != NULL)
+ free (debug->ss);
+ if (debug->ssext != NULL)
+ free (debug->ssext);
+ if (debug->external_fdr != NULL)
+ free (debug->external_fdr);
+ if (debug->external_rfd != NULL)
+ free (debug->external_rfd);
+ if (debug->external_ext != NULL)
+ free (debug->external_ext);
+ return FALSE;
+}
- if (--lit_gotent->use_count == 0)
- {
- int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
- alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
- }
- }
+/* Alpha ELF local labels start with '$'. */
- /* Change
+static bfd_boolean
+elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
+{
+ return name[0] == '$';
+}
- lda $16,x($gp) !tlsgd!1
- ldq $27,__tls_get_addr($gp) !literal!1
- jsr $26,($27)__tls_get_addr !lituse_tlsgd!1
- ldah $29,0($26) !gpdisp!2
- lda $29,0($29) !gpdisp!2
- to
- ldq $16,x($gp) !gottprel
- unop
- call_pal rduniq
- addq $16,$0,$0
- unop
- or the first pair to
- lda $16,x($gp) !tprel
- unop
- or
- ldah $16,x($gp) !tprelhi
- lda $16,x($16) !tprello
+/* Alpha ELF follows MIPS ELF in using a special find_nearest_line
+ routine in order to handle the ECOFF debugging information. We
+ still call this mips_elf_find_line because of the slot
+ find_line_info in elf_obj_tdata is declared that way. */
- as appropriate. */
+struct mips_elf_find_line
+{
+ struct ecoff_debug_info d;
+ struct ecoff_find_line i;
+};
- use_gottprel = false;
- switch (!dynamic && !info->link_info->shared)
+static bfd_boolean
+elf64_alpha_find_nearest_line (bfd *abfd, asection *section, asymbol **symbols,
+ bfd_vma offset, const char **filename_ptr,
+ const char **functionname_ptr,
+ unsigned int *line_ptr)
+{
+ asection *msec;
+
+ if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
+ section, symbols, offset,
+ filename_ptr, functionname_ptr,
+ line_ptr, 0,
+ &elf_tdata (abfd)->dwarf2_find_line_info))
+ return TRUE;
+
+ msec = bfd_get_section_by_name (abfd, ".mdebug");
+ if (msec != NULL)
{
- case 1:
- {
- bfd_vma tp_base;
- bfd_signed_vma disp;
+ flagword origflags;
+ struct mips_elf_find_line *fi;
+ const struct ecoff_debug_swap * const swap =
+ get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
- BFD_ASSERT (info->tls_segment != NULL);
- tp_base = alpha_get_tprel_base (info->tls_segment);
- disp = symval - tp_base;
+ /* If we are called during a link, alpha_elf_final_link may have
+ cleared the SEC_HAS_CONTENTS field. We force it back on here
+ if appropriate (which it normally will be). */
+ origflags = msec->flags;
+ if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
+ msec->flags |= SEC_HAS_CONTENTS;
- if (disp >= -0x8000 && disp < 0x8000)
- {
- insn = (OP_LDA << 26) | (16 << 21) | (31 << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
+ fi = elf_tdata (abfd)->find_line_info;
+ if (fi == NULL)
+ {
+ bfd_size_type external_fdr_size;
+ char *fraw_src;
+ char *fraw_end;
+ struct fdr *fdr_ptr;
+ bfd_size_type amt = sizeof (struct mips_elf_find_line);
- irel[0].r_offset = pos[0] - info->contents;
- irel[0].r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_TPREL16);
- irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- break;
- }
- else if (disp >= -(bfd_signed_vma) 0x80000000
- && disp < (bfd_signed_vma) 0x7fff8000)
- {
- insn = (OP_LDAH << 26) | (16 << 21) | (31 << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
- insn = (OP_LDA << 26) | (16 << 21) | (16 << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]);
+ fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt);
+ if (fi == NULL)
+ {
+ msec->flags = origflags;
+ return FALSE;
+ }
- irel[0].r_offset = pos[0] - info->contents;
- irel[0].r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_TPRELHI);
- irel[1].r_offset = pos[1] - info->contents;
- irel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_TPRELLO);
- break;
- }
- }
- /* FALLTHRU */
+ if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
+ {
+ msec->flags = origflags;
+ return FALSE;
+ }
- default:
- use_gottprel = true;
+ /* Swap in the FDR information. */
+ amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
+ fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt);
+ if (fi->d.fdr == NULL)
+ {
+ msec->flags = origflags;
+ return FALSE;
+ }
+ external_fdr_size = swap->external_fdr_size;
+ fdr_ptr = fi->d.fdr;
+ fraw_src = (char *) fi->d.external_fdr;
+ fraw_end = (fraw_src
+ + fi->d.symbolic_header.ifdMax * external_fdr_size);
+ for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
+ (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
- insn = (OP_LDQ << 26) | (16 << 21) | (29 << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
+ elf_tdata (abfd)->find_line_info = fi;
- irel[0].r_offset = pos[0] - info->contents;
- irel[0].r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GOTTPREL);
- irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- break;
- }
+ /* Note that we don't bother to ever free this information.
+ find_nearest_line is either called all the time, as in
+ objdump -l, so the information should be saved, or it is
+ rarely called, as in ld error messages, so the memory
+ wasted is unimportant. Still, it would probably be a
+ good idea for free_cached_info to throw it away. */
+ }
- bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]);
+ if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
+ &fi->i, filename_ptr, functionname_ptr,
+ line_ptr))
+ {
+ msec->flags = origflags;
+ return TRUE;
+ }
- insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]);
+ msec->flags = origflags;
+ }
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]);
+ /* Fall back on the generic ELF find_nearest_line routine. */
- irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
+ filename_ptr, functionname_ptr,
+ line_ptr);
+}
+\f
+/* Structure used to pass information to alpha_elf_output_extsym. */
- hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
- irel[2].r_offset, R_ALPHA_HINT);
- if (hint)
- hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+struct extsym_info
+{
+ bfd *abfd;
+ struct bfd_link_info *info;
+ struct ecoff_debug_info *debug;
+ const struct ecoff_debug_swap *swap;
+ bfd_boolean failed;
+};
+
+static bfd_boolean
+elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry *h, PTR data)
+{
+ struct extsym_info *einfo = (struct extsym_info *) data;
+ bfd_boolean strip;
+ asection *sec, *output_section;
- info->changed_contents = true;
- info->changed_relocs = true;
+ if (h->root.indx == -2)
+ strip = FALSE;
+ else if ((h->root.def_dynamic
+ || h->root.ref_dynamic
+ || h->root.root.type == bfd_link_hash_new)
+ && !h->root.def_regular
+ && !h->root.ref_regular)
+ strip = TRUE;
+ else if (einfo->info->strip == strip_all
+ || (einfo->info->strip == strip_some
+ && bfd_hash_lookup (einfo->info->keep_hash,
+ h->root.root.root.string,
+ FALSE, FALSE) == NULL))
+ strip = TRUE;
+ else
+ strip = FALSE;
- /* Reduce the use count on the TLSGD/TLSLDM relocation. */
- if (--info->gotent->use_count == 0)
- {
- int sz = alpha_got_entry_size (info->gotent->reloc_type);
- alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
- if (!info->h)
- alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
- }
+ if (strip)
+ return TRUE;
- /* If we've switched to a GOTTPREL relocation, increment the reference
- count on that got entry. */
- if (use_gottprel)
+ if (h->esym.ifd == -2)
{
- struct alpha_elf_got_entry *tprel_gotent;
+ h->esym.jmptbl = 0;
+ h->esym.cobol_main = 0;
+ h->esym.weakext = 0;
+ h->esym.reserved = 0;
+ h->esym.ifd = ifdNil;
+ h->esym.asym.value = 0;
+ h->esym.asym.st = stGlobal;
- for (tprel_gotent = *info->first_gotent; tprel_gotent ;
- tprel_gotent = tprel_gotent->next)
- if (tprel_gotent->gotobj == info->gotobj
- && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL
- && tprel_gotent->addend == irel->r_addend)
- break;
- if (tprel_gotent)
- tprel_gotent->use_count++;
+ if (h->root.root.type != bfd_link_hash_defined
+ && h->root.root.type != bfd_link_hash_defweak)
+ h->esym.asym.sc = scAbs;
else
{
- if (info->gotent->use_count == 0)
- tprel_gotent = info->gotent;
+ const char *name;
+
+ sec = h->root.root.u.def.section;
+ output_section = sec->output_section;
+
+ /* When making a shared library and symbol h is the one from
+ the another shared library, OUTPUT_SECTION may be null. */
+ if (output_section == NULL)
+ h->esym.asym.sc = scUndefined;
else
{
- tprel_gotent = (struct alpha_elf_got_entry *)
- bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry));
- if (!tprel_gotent)
- return false;
-
- tprel_gotent->next = *info->first_gotent;
- *info->first_gotent = tprel_gotent;
+ name = bfd_section_name (output_section->owner, output_section);
- tprel_gotent->gotobj = info->gotobj;
- tprel_gotent->addend = irel->r_addend;
- tprel_gotent->got_offset = -1;
- tprel_gotent->reloc_done = 0;
- tprel_gotent->reloc_xlated = 0;
+ if (strcmp (name, ".text") == 0)
+ h->esym.asym.sc = scText;
+ else if (strcmp (name, ".data") == 0)
+ h->esym.asym.sc = scData;
+ else if (strcmp (name, ".sdata") == 0)
+ h->esym.asym.sc = scSData;
+ else if (strcmp (name, ".rodata") == 0
+ || strcmp (name, ".rdata") == 0)
+ h->esym.asym.sc = scRData;
+ else if (strcmp (name, ".bss") == 0)
+ h->esym.asym.sc = scBss;
+ else if (strcmp (name, ".sbss") == 0)
+ h->esym.asym.sc = scSBss;
+ else if (strcmp (name, ".init") == 0)
+ h->esym.asym.sc = scInit;
+ else if (strcmp (name, ".fini") == 0)
+ h->esym.asym.sc = scFini;
+ else
+ h->esym.asym.sc = scAbs;
}
-
- tprel_gotent->use_count = 1;
- tprel_gotent->reloc_type = R_ALPHA_GOTTPREL;
}
+
+ h->esym.asym.reserved = 0;
+ h->esym.asym.index = indexNil;
}
- return true;
-}
+ if (h->root.root.type == bfd_link_hash_common)
+ h->esym.asym.value = h->root.root.u.c.size;
+ else if (h->root.root.type == bfd_link_hash_defined
+ || h->root.root.type == bfd_link_hash_defweak)
+ {
+ if (h->esym.asym.sc == scCommon)
+ h->esym.asym.sc = scBss;
+ else if (h->esym.asym.sc == scSCommon)
+ h->esym.asym.sc = scSBss;
-static struct elf_link_tls_segment *
-elf64_alpha_relax_find_tls_segment (info, seg)
- struct alpha_relax_info *info;
- struct elf_link_tls_segment *seg;
-{
- bfd *output_bfd = info->sec->output_section->owner;
- asection *o;
- unsigned int align;
- bfd_vma base, end;
+ sec = h->root.root.u.def.section;
+ output_section = sec->output_section;
+ if (output_section != NULL)
+ h->esym.asym.value = (h->root.root.u.def.value
+ + sec->output_offset
+ + output_section->vma);
+ else
+ h->esym.asym.value = 0;
+ }
- for (o = output_bfd->sections; o ; o = o->next)
- if ((o->flags & SEC_THREAD_LOCAL) != 0
- && (o->flags & SEC_LOAD) != 0)
- break;
- if (!o)
- return NULL;
+ if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
+ h->root.root.root.string,
+ &h->esym))
+ {
+ einfo->failed = TRUE;
+ return FALSE;
+ }
+
+ return TRUE;
+}
+\f
+/* Search for and possibly create a got entry. */
- base = o->vma;
- align = 0;
+static struct alpha_elf_got_entry *
+get_got_entry (bfd *abfd, struct alpha_elf_link_hash_entry *h,
+ unsigned long r_type, unsigned long r_symndx,
+ bfd_vma r_addend)
+{
+ struct alpha_elf_got_entry *gotent;
+ struct alpha_elf_got_entry **slot;
- do
+ if (h)
+ slot = &h->got_entries;
+ else
{
- bfd_vma size;
+ /* This is a local .got entry -- record for merge. */
- if (bfd_get_section_alignment (output_bfd, o) > align)
- align = bfd_get_section_alignment (output_bfd, o);
+ struct alpha_elf_got_entry **local_got_entries;
- size = o->_raw_size;
- if (size == 0 && (o->flags & SEC_HAS_CONTENTS) == 0)
+ local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
+ if (!local_got_entries)
{
- struct bfd_link_order *lo;
- for (lo = o->link_order_head; lo ; lo = lo->next)
- if (size < lo->offset + lo->size)
- size = lo->offset + lo->size;
- }
- end = o->vma + size;
- o = o->next;
- }
- while (o && (o->flags & SEC_THREAD_LOCAL));
+ bfd_size_type size;
+ Elf_Internal_Shdr *symtab_hdr;
- seg->start = base;
- seg->size = end - base;
- seg->align = align;
+ symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
+ size = symtab_hdr->sh_info;
+ size *= sizeof (struct alpha_elf_got_entry *);
- return seg;
-}
+ local_got_entries
+ = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size);
+ if (!local_got_entries)
+ return NULL;
-static boolean
-elf64_alpha_relax_section (abfd, sec, link_info, again)
- bfd *abfd;
- asection *sec;
- struct bfd_link_info *link_info;
- boolean *again;
-{
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Rela *internal_relocs;
- Elf_Internal_Rela *irel, *irelend;
- Elf_Internal_Sym *isymbuf = NULL;
- struct alpha_elf_got_entry **local_got_entries;
- struct alpha_relax_info info;
- struct elf_link_tls_segment tls_segment;
+ alpha_elf_tdata (abfd)->local_got_entries = local_got_entries;
+ }
- /* We are not currently changing any sizes, so only one pass. */
- *again = false;
+ slot = &local_got_entries[r_symndx];
+ }
- if (link_info->relocateable
- || (sec->flags & SEC_RELOC) == 0
- || sec->reloc_count == 0)
- return true;
+ for (gotent = *slot; gotent ; gotent = gotent->next)
+ if (gotent->gotobj == abfd
+ && gotent->reloc_type == r_type
+ && gotent->addend == r_addend)
+ break;
- /* If this is the first time we have been called for this section,
- initialize the cooked size. */
- if (sec->_cooked_size == 0)
- sec->_cooked_size = sec->_raw_size;
+ if (!gotent)
+ {
+ int entry_size;
+ bfd_size_type amt;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
+ amt = sizeof (struct alpha_elf_got_entry);
+ gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt);
+ if (!gotent)
+ return NULL;
- /* Load the relocations for this section. */
- internal_relocs = (_bfd_elf64_link_read_relocs
- (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
- link_info->keep_memory));
- if (internal_relocs == NULL)
- return false;
+ gotent->gotobj = abfd;
+ gotent->addend = r_addend;
+ gotent->got_offset = -1;
+ gotent->plt_offset = -1;
+ gotent->use_count = 1;
+ gotent->reloc_type = r_type;
+ gotent->reloc_done = 0;
+ gotent->reloc_xlated = 0;
- memset(&info, 0, sizeof (info));
- info.abfd = abfd;
- info.sec = sec;
- info.link_info = link_info;
- info.symtab_hdr = symtab_hdr;
- info.relocs = internal_relocs;
- info.relend = irelend = internal_relocs + sec->reloc_count;
+ gotent->next = *slot;
+ *slot = gotent;
- /* Find the GP for this object. Do not store the result back via
- _bfd_set_gp_value, since this could change again before final. */
- info.gotobj = alpha_elf_tdata (abfd)->gotobj;
- if (info.gotobj)
- {
- asection *sgot = alpha_elf_tdata (info.gotobj)->got;
- info.gp = (sgot->output_section->vma
- + sgot->output_offset
- + 0x8000);
+ entry_size = alpha_got_entry_size (r_type);
+ alpha_elf_tdata (abfd)->total_got_size += entry_size;
+ if (!h)
+ alpha_elf_tdata(abfd)->local_got_size += entry_size;
}
-
- /* Get the section contents. */
- if (elf_section_data (sec)->this_hdr.contents != NULL)
- info.contents = elf_section_data (sec)->this_hdr.contents;
else
- {
- info.contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
- if (info.contents == NULL)
- goto error_return;
+ gotent->use_count += 1;
- if (! bfd_get_section_contents (abfd, sec, info.contents,
- (file_ptr) 0, sec->_raw_size))
- goto error_return;
- }
+ return gotent;
+}
- /* Compute the TLS segment information. The version normally found in
- elf_hash_table (link_info)->tls_segment isn't built until final_link.
- ??? Probably should look into extracting this into a common function. */
- info.tls_segment = elf64_alpha_relax_find_tls_segment (&info, &tls_segment);
+static bfd_boolean
+elf64_alpha_want_plt (struct alpha_elf_link_hash_entry *ah)
+{
+ return ((ah->root.type == STT_FUNC
+ || ah->root.root.type == bfd_link_hash_undefweak
+ || ah->root.root.type == bfd_link_hash_undefined)
+ && (ah->flags & ALPHA_ELF_LINK_HASH_LU_PLT) != 0
+ && (ah->flags & ~ALPHA_ELF_LINK_HASH_LU_PLT) == 0);
+}
- for (irel = internal_relocs; irel < irelend; irel++)
- {
- bfd_vma symval;
- struct alpha_elf_got_entry *gotent;
- unsigned long r_type = ELF64_R_TYPE (irel->r_info);
+/* Handle dynamic relocations when doing an Alpha ELF link. */
- /* Early exit for unhandled or unrelaxable relocations. */
- switch (r_type)
- {
- case R_ALPHA_LITERAL:
- case R_ALPHA_GPRELHIGH:
- case R_ALPHA_GPRELLOW:
- case R_ALPHA_GOTDTPREL:
- case R_ALPHA_GOTTPREL:
- case R_ALPHA_TLSGD:
- case R_ALPHA_TLSLDM:
- break;
- default:
- continue;
- }
+static bfd_boolean
+elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info,
+ asection *sec, const Elf_Internal_Rela *relocs)
+{
+ bfd *dynobj;
+ asection *sreloc;
+ Elf_Internal_Shdr *symtab_hdr;
+ struct alpha_elf_link_hash_entry **sym_hashes;
+ const Elf_Internal_Rela *rel, *relend;
+ bfd_size_type amt;
- /* Get the value of the symbol referred to by the reloc. */
- if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info)
- {
- /* A local symbol. */
- Elf_Internal_Sym *isym;
+ if (info->relocatable)
+ return TRUE;
- /* Read this BFD's local symbols. */
- if (isymbuf == NULL)
- {
- isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
- if (isymbuf == NULL)
- isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
- symtab_hdr->sh_info, 0,
- NULL, NULL, NULL);
- if (isymbuf == NULL)
- goto error_return;
- }
+ /* Don't do anything special with non-loaded, non-alloced sections.
+ In particular, any relocs in such sections should not affect GOT
+ and PLT reference counting (ie. we don't allow them to create GOT
+ or PLT entries), there's no possibility or desire to optimize TLS
+ relocs, and there's not much point in propagating relocs to shared
+ libs that the dynamic linker won't relocate. */
+ if ((sec->flags & SEC_ALLOC) == 0)
+ return TRUE;
- isym = isymbuf + ELF64_R_SYM (irel->r_info);
- if (isym->st_shndx == SHN_UNDEF)
- continue;
- else if (isym->st_shndx == SHN_ABS)
- info.tsec = bfd_abs_section_ptr;
- else if (isym->st_shndx == SHN_COMMON)
- info.tsec = bfd_com_section_ptr;
- else
- info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ BFD_ASSERT (is_alpha_elf (abfd));
- info.h = NULL;
- info.other = isym->st_other;
- info.first_gotent = &local_got_entries[ELF64_R_SYM(irel->r_info)];
- symval = isym->st_value;
- }
+ dynobj = elf_hash_table (info)->dynobj;
+ if (dynobj == NULL)
+ elf_hash_table (info)->dynobj = dynobj = abfd;
+
+ sreloc = NULL;
+ symtab_hdr = &elf_symtab_hdr (abfd);
+ sym_hashes = alpha_elf_sym_hashes (abfd);
+
+ relend = relocs + sec->reloc_count;
+ for (rel = relocs; rel < relend; ++rel)
+ {
+ enum {
+ NEED_GOT = 1,
+ NEED_GOT_ENTRY = 2,
+ NEED_DYNREL = 4
+ };
+
+ unsigned long r_symndx, r_type;
+ struct alpha_elf_link_hash_entry *h;
+ unsigned int gotent_flags;
+ bfd_boolean maybe_dynamic;
+ unsigned int need;
+ bfd_vma addend;
+
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
else
{
- unsigned long indx;
- struct alpha_elf_link_hash_entry *h;
-
- indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info;
- h = alpha_elf_sym_hashes (abfd)[indx];
- BFD_ASSERT (h != NULL);
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.root.type == bfd_link_hash_indirect
|| h->root.root.type == bfd_link_hash_warning)
h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
- /* If the symbol is undefined, we can't do anything with it. */
- if (h->root.root.type == bfd_link_hash_undefweak
- || h->root.root.type == bfd_link_hash_undefined)
- continue;
-
- /* If the symbol isn't defined in the current module, again
- we can't do anything. */
- if (!(h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
- continue;
-
- info.h = h;
- info.tsec = h->root.root.u.def.section;
- info.other = h->root.other;
- info.first_gotent = &h->got_entries;
- symval = h->root.root.u.def.value;
+ h->root.ref_regular = 1;
}
- /* Search for the got entry to be used by this relocation. */
- for (gotent = *info.first_gotent; gotent ; gotent = gotent->next)
- if (gotent->gotobj == info.gotobj
- && gotent->reloc_type == r_type
- && gotent->addend == irel->r_addend)
- break;
- info.gotent = gotent;
+ /* We can only get preliminary data on whether a symbol is
+ locally or externally defined, as not all of the input files
+ have yet been processed. Do something with what we know, as
+ this may help reduce memory usage and processing time later. */
+ maybe_dynamic = FALSE;
+ if (h && ((info->shared
+ && (!info->symbolic
+ || info->unresolved_syms_in_shared_libs == RM_IGNORE))
+ || !h->root.def_regular
+ || h->root.root.type == bfd_link_hash_defweak))
+ maybe_dynamic = TRUE;
- symval += info.tsec->output_section->vma + info.tsec->output_offset;
- symval += irel->r_addend;
+ need = 0;
+ gotent_flags = 0;
+ r_type = ELF64_R_TYPE (rel->r_info);
+ addend = rel->r_addend;
switch (r_type)
{
case R_ALPHA_LITERAL:
- BFD_ASSERT(info.gotent != NULL);
+ need = NEED_GOT | NEED_GOT_ENTRY;
- /* If there exist LITUSE relocations immediately following, this
- opens up all sorts of interesting optimizations, because we
- now know every location that this address load is used. */
- if (irel+1 < irelend
- && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
- {
- if (!elf64_alpha_relax_with_lituse (&info, symval, irel))
- goto error_return;
- }
- else
- {
- if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
- goto error_return;
- }
+ /* Remember how this literal is used from its LITUSEs.
+ This will be important when it comes to decide if we can
+ create a .plt entry for a function symbol. */
+ while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE)
+ if (rel->r_addend >= 1 && rel->r_addend <= 6)
+ gotent_flags |= 1 << rel->r_addend;
+ --rel;
+
+ /* No LITUSEs -- presumably the address is used somehow. */
+ if (gotent_flags == 0)
+ gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
break;
+ case R_ALPHA_GPDISP:
+ case R_ALPHA_GPREL16:
+ case R_ALPHA_GPREL32:
case R_ALPHA_GPRELHIGH:
case R_ALPHA_GPRELLOW:
- if (!elf64_alpha_relax_gprelhilo (&info, symval, irel,
- r_type == R_ALPHA_GPRELHIGH))
- goto error_return;
+ case R_ALPHA_BRSGP:
+ need = NEED_GOT;
break;
- case R_ALPHA_GOTDTPREL:
- case R_ALPHA_GOTTPREL:
- BFD_ASSERT(info.gotent != NULL);
- if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
- goto error_return;
+ case R_ALPHA_REFLONG:
+ case R_ALPHA_REFQUAD:
+ if (info->shared || maybe_dynamic)
+ need = NEED_DYNREL;
break;
- case R_ALPHA_TLSGD:
case R_ALPHA_TLSLDM:
- BFD_ASSERT(info.gotent != NULL);
- if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel,
- r_type == R_ALPHA_TLSGD))
- goto error_return;
+ /* The symbol for a TLSLDM reloc is ignored. Collapse the
+ reloc to the STN_UNDEF (0) symbol so that they all match. */
+ r_symndx = STN_UNDEF;
+ h = 0;
+ maybe_dynamic = FALSE;
+ /* FALLTHRU */
+
+ case R_ALPHA_TLSGD:
+ case R_ALPHA_GOTDTPREL:
+ need = NEED_GOT | NEED_GOT_ENTRY;
break;
- }
- }
- if (!elf64_alpha_size_plt_section (link_info))
- return false;
- if (!elf64_alpha_size_got_sections (link_info))
- return false;
- if (!elf64_alpha_size_rela_got_section (link_info))
- return false;
+ case R_ALPHA_GOTTPREL:
+ need = NEED_GOT | NEED_GOT_ENTRY;
+ gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE;
+ if (info->shared)
+ info->flags |= DF_STATIC_TLS;
+ break;
- if (isymbuf != NULL
- && symtab_hdr->contents != (unsigned char *) isymbuf)
- {
- if (!link_info->keep_memory)
- free (isymbuf);
- else
- {
- /* Cache the symbols for elf_link_input_bfd. */
- symtab_hdr->contents = (unsigned char *) isymbuf;
+ case R_ALPHA_TPREL64:
+ if (info->shared && !info->pie)
+ {
+ info->flags |= DF_STATIC_TLS;
+ need = NEED_DYNREL;
+ }
+ else if (maybe_dynamic)
+ need = NEED_DYNREL;
+ break;
}
- }
- if (info.contents != NULL
- && elf_section_data (sec)->this_hdr.contents != info.contents)
- {
- if (!info.changed_contents && !link_info->keep_memory)
- free (info.contents);
- else
+ if (need & NEED_GOT)
{
- /* Cache the section contents for elf_link_input_bfd. */
- elf_section_data (sec)->this_hdr.contents = info.contents;
+ if (alpha_elf_tdata(abfd)->gotobj == NULL)
+ {
+ if (!elf64_alpha_create_got_section (abfd, info))
+ return FALSE;
+ }
}
- }
-
- if (elf_section_data (sec)->relocs != internal_relocs)
- {
- if (!info.changed_relocs)
- free (internal_relocs);
- else
- elf_section_data (sec)->relocs = internal_relocs;
- }
- *again = info.changed_contents || info.changed_relocs;
-
- return true;
+ if (need & NEED_GOT_ENTRY)
+ {
+ struct alpha_elf_got_entry *gotent;
- error_return:
- if (isymbuf != NULL
- && symtab_hdr->contents != (unsigned char *) isymbuf)
- free (isymbuf);
- if (info.contents != NULL
- && elf_section_data (sec)->this_hdr.contents != info.contents)
- free (info.contents);
- if (internal_relocs != NULL
- && elf_section_data (sec)->relocs != internal_relocs)
- free (internal_relocs);
- return false;
-}
-\f
-/* PLT/GOT Stuff */
-#define PLT_HEADER_SIZE 32
-#define PLT_HEADER_WORD1 (bfd_vma) 0xc3600000 /* br $27,.+4 */
-#define PLT_HEADER_WORD2 (bfd_vma) 0xa77b000c /* ldq $27,12($27) */
-#define PLT_HEADER_WORD3 (bfd_vma) 0x47ff041f /* nop */
-#define PLT_HEADER_WORD4 (bfd_vma) 0x6b7b0000 /* jmp $27,($27) */
+ gotent = get_got_entry (abfd, h, r_type, r_symndx, addend);
+ if (!gotent)
+ return FALSE;
-#define PLT_ENTRY_SIZE 12
-#define PLT_ENTRY_WORD1 0xc3800000 /* br $28, plt0 */
-#define PLT_ENTRY_WORD2 0
-#define PLT_ENTRY_WORD3 0
+ if (gotent_flags)
+ {
+ gotent->flags |= gotent_flags;
+ if (h)
+ {
+ gotent_flags |= h->flags;
+ h->flags = gotent_flags;
-#define MAX_GOT_SIZE (64*1024)
+ /* Make a guess as to whether a .plt entry is needed. */
+ /* ??? It appears that we won't make it into
+ adjust_dynamic_symbol for symbols that remain
+ totally undefined. Copying this check here means
+ we can create a plt entry for them too. */
+ h->root.needs_plt
+ = (maybe_dynamic && elf64_alpha_want_plt (h));
+ }
+ }
+ }
-#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
-\f
-/* Handle an Alpha specific section when reading an object file. This
- is called when elfcode.h finds a section with an unknown type.
- FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure
- how to. */
+ if (need & NEED_DYNREL)
+ {
+ /* We need to create the section here now whether we eventually
+ use it or not so that it gets mapped to an output section by
+ the linker. If not used, we'll kill it in size_dynamic_sections. */
+ if (sreloc == NULL)
+ {
+ sreloc = _bfd_elf_make_dynamic_reloc_section
+ (sec, dynobj, 3, abfd, /*rela?*/ TRUE);
-static boolean
-elf64_alpha_section_from_shdr (abfd, hdr, name)
- bfd *abfd;
- Elf_Internal_Shdr *hdr;
- const char *name;
-{
- asection *newsect;
+ if (sreloc == NULL)
+ return FALSE;
+ }
- /* There ought to be a place to keep ELF backend specific flags, but
- at the moment there isn't one. We just keep track of the
- sections by their name, instead. Fortunately, the ABI gives
- suggested names for all the MIPS specific sections, so we will
- probably get away with this. */
- switch (hdr->sh_type)
- {
- case SHT_ALPHA_DEBUG:
- if (strcmp (name, ".mdebug") != 0)
- return false;
- break;
- default:
- return false;
- }
+ if (h)
+ {
+ /* Since we havn't seen all of the input symbols yet, we
+ don't know whether we'll actually need a dynamic relocation
+ entry for this reloc. So make a record of it. Once we
+ find out if this thing needs dynamic relocation we'll
+ expand the relocation sections by the appropriate amount. */
- if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
- return false;
- newsect = hdr->bfd_section;
+ struct alpha_elf_reloc_entry *rent;
- if (hdr->sh_type == SHT_ALPHA_DEBUG)
- {
- if (! bfd_set_section_flags (abfd, newsect,
- (bfd_get_section_flags (abfd, newsect)
- | SEC_DEBUGGING)))
- return false;
- }
+ for (rent = h->reloc_entries; rent; rent = rent->next)
+ if (rent->rtype == r_type && rent->srel == sreloc)
+ break;
- return true;
-}
+ if (!rent)
+ {
+ amt = sizeof (struct alpha_elf_reloc_entry);
+ rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
+ if (!rent)
+ return FALSE;
-/* Convert Alpha specific section flags to bfd internal section flags. */
+ rent->srel = sreloc;
+ rent->rtype = r_type;
+ rent->count = 1;
+ rent->reltext = (sec->flags & SEC_READONLY) != 0;
-static boolean
-elf64_alpha_section_flags (flags, hdr)
- flagword *flags;
- Elf_Internal_Shdr *hdr;
-{
- if (hdr->sh_flags & SHF_ALPHA_GPREL)
- *flags |= SEC_SMALL_DATA;
+ rent->next = h->reloc_entries;
+ h->reloc_entries = rent;
+ }
+ else
+ rent->count++;
+ }
+ else if (info->shared)
+ {
+ /* If this is a shared library, and the section is to be
+ loaded into memory, we need a RELATIVE reloc. */
+ sreloc->size += sizeof (Elf64_External_Rela);
+ if (sec->flags & SEC_READONLY)
+ info->flags |= DF_TEXTREL;
+ }
+ }
+ }
- return true;
+ return TRUE;
}
-/* Set the correct type for an Alpha ELF section. We do this by the
- section name, which is a hack, but ought to work. */
+/* Return the section that should be marked against GC for a given
+ relocation. */
-static boolean
-elf64_alpha_fake_sections (abfd, hdr, sec)
- bfd *abfd;
- Elf_Internal_Shdr *hdr;
- asection *sec;
+static asection *
+elf64_alpha_gc_mark_hook (asection *sec, struct bfd_link_info *info,
+ Elf_Internal_Rela *rel,
+ struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)
{
- register const char *name;
-
- name = bfd_get_section_name (abfd, sec);
-
- if (strcmp (name, ".mdebug") == 0)
+ /* These relocations don't really reference a symbol. Instead we store
+ extra data in their addend slot. Ignore the symbol. */
+ switch (ELF64_R_TYPE (rel->r_info))
{
- hdr->sh_type = SHT_ALPHA_DEBUG;
- /* In a shared object on Irix 5.3, the .mdebug section has an
- entsize of 0. FIXME: Does this matter? */
- if ((abfd->flags & DYNAMIC) != 0 )
- hdr->sh_entsize = 0;
- else
- hdr->sh_entsize = 1;
+ case R_ALPHA_LITUSE:
+ case R_ALPHA_GPDISP:
+ case R_ALPHA_HINT:
+ return NULL;
}
- else if ((sec->flags & SEC_SMALL_DATA)
- || strcmp (name, ".sdata") == 0
- || strcmp (name, ".sbss") == 0
- || strcmp (name, ".lit4") == 0
- || strcmp (name, ".lit8") == 0)
- hdr->sh_flags |= SHF_ALPHA_GPREL;
- return true;
+ return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
}
-/* Hook called by the linker routine which adds symbols from an object
- file. We use it to put .comm items in .sbss, and not .bss. */
+/* Update the got entry reference counts for the section being removed. */
-static boolean
-elf64_alpha_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
- bfd *abfd;
- struct bfd_link_info *info;
- const Elf_Internal_Sym *sym;
- const char **namep ATTRIBUTE_UNUSED;
- flagword *flagsp ATTRIBUTE_UNUSED;
- asection **secp;
- bfd_vma *valp;
+static bfd_boolean
+elf64_alpha_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
+ asection *sec, const Elf_Internal_Rela *relocs)
{
- if (sym->st_shndx == SHN_COMMON
- && !info->relocateable
- && sym->st_size <= elf_gp_size (abfd))
- {
- /* Common symbols less than or equal to -G nn bytes are
- automatically put into .sbss. */
-
- asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
-
- if (scomm == NULL)
- {
- scomm = bfd_make_section (abfd, ".scommon");
- if (scomm == NULL
- || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC
- | SEC_IS_COMMON
- | SEC_LINKER_CREATED)))
- return false;
- }
+ Elf_Internal_Shdr *symtab_hdr;
+ struct alpha_elf_link_hash_entry **sym_hashes;
+ const Elf_Internal_Rela *rel, *relend;
- *secp = scomm;
- *valp = sym->st_size;
- }
+ if (info->relocatable)
+ return TRUE;
- return true;
-}
+ symtab_hdr = &elf_symtab_hdr (abfd);
+ sym_hashes = alpha_elf_sym_hashes (abfd);
-/* Create the .got section. */
+ relend = relocs + sec->reloc_count;
+ for (rel = relocs; rel < relend; rel++)
+ {
+ unsigned long r_symndx, r_type;
+ struct alpha_elf_link_hash_entry *h = NULL;
+ struct alpha_elf_got_entry *gotent;
-static boolean
-elf64_alpha_create_got_section(abfd, info)
- bfd *abfd;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
-{
- asection *s;
+ r_symndx = ELF64_R_SYM (rel->r_info);
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ while (h->root.root.type == bfd_link_hash_indirect
+ || h->root.root.type == bfd_link_hash_warning)
+ h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
+ }
- if (bfd_get_section_by_name (abfd, ".got"))
- return true;
+ r_type = ELF64_R_TYPE (rel->r_info);
+ switch (r_type)
+ {
+ case R_ALPHA_LITERAL:
+ /* ??? Ignore re-computation of gotent_flags. We're not
+ carrying a use-count for each bit in that mask. */
- s = bfd_make_section (abfd, ".got");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED))
- || !bfd_set_section_alignment (abfd, s, 3))
- return false;
+ case R_ALPHA_TLSGD:
+ case R_ALPHA_GOTDTPREL:
+ case R_ALPHA_GOTTPREL:
+ /* Fetch the got entry from the tables. */
+ gotent = get_got_entry (abfd, h, r_type, r_symndx, rel->r_addend);
+
+ /* The got entry *must* exist, since we should have created it
+ before during check_relocs. Also note that get_got_entry
+ assumed this was going to be another use, and so incremented
+ the use count again. Thus the use count must be at least the
+ one real use and the "use" we just added. */
+ if (gotent == NULL || gotent->use_count < 2)
+ {
+ abort ();
+ return FALSE;
+ }
+ gotent->use_count -= 2;
+ break;
- alpha_elf_tdata (abfd)->got = s;
+ default:
+ break;
+ }
+ }
- return true;
+ return TRUE;
}
-/* Create all the dynamic sections. */
+/* Adjust a symbol defined by a dynamic object and referenced by a
+ regular object. The current definition is in some section of the
+ dynamic object, but we're not including those sections. We have to
+ change the definition to something the rest of the link can
+ understand. */
-static boolean
-elf64_alpha_create_dynamic_sections (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
+static bfd_boolean
+elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *h)
{
+ bfd *dynobj;
asection *s;
- struct elf_link_hash_entry *h;
- struct bfd_link_hash_entry *bh;
-
- /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
+ struct alpha_elf_link_hash_entry *ah;
- s = bfd_make_section (abfd, ".plt");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED
- | SEC_CODE))
- || ! bfd_set_section_alignment (abfd, s, 3))
- return false;
+ dynobj = elf_hash_table(info)->dynobj;
+ ah = (struct alpha_elf_link_hash_entry *)h;
- /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
- .plt section. */
- bh = NULL;
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
- (bfd_vma) 0, (const char *) NULL, false,
- get_elf_backend_data (abfd)->collect, &bh)))
- return false;
- h = (struct elf_link_hash_entry *) bh;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && ! _bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
-
- s = bfd_make_section (abfd, ".rela.plt");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED
- | SEC_READONLY))
- || ! bfd_set_section_alignment (abfd, s, 3))
- return false;
+ /* Now that we've seen all of the input symbols, finalize our decision
+ about whether this symbol should get a .plt entry. Irritatingly, it
+ is common for folk to leave undefined symbols in shared libraries,
+ and they still expect lazy binding; accept undefined symbols in lieu
+ of STT_FUNC. */
+ if (alpha_elf_dynamic_symbol_p (h, info) && elf64_alpha_want_plt (ah))
+ {
+ h->needs_plt = TRUE;
- /* We may or may not have created a .got section for this object, but
- we definitely havn't done the rest of the work. */
+ s = bfd_get_section_by_name(dynobj, ".plt");
+ if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
+ return FALSE;
- if (!elf64_alpha_create_got_section (abfd, info))
- return false;
+ /* We need one plt entry per got subsection. Delay allocation of
+ the actual plt entries until size_plt_section, called from
+ size_dynamic_sections or during relaxation. */
- s = bfd_make_section(abfd, ".rela.got");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED
- | SEC_READONLY))
- || !bfd_set_section_alignment (abfd, s, 3))
- return false;
+ return TRUE;
+ }
+ else
+ h->needs_plt = FALSE;
- /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
- dynobj's .got section. We don't do this in the linker script
- because we don't want to define the symbol if we are not creating
- a global offset table. */
- bh = NULL;
- if (!(_bfd_generic_link_add_one_symbol
- (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL,
- alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) NULL,
- false, get_elf_backend_data (abfd)->collect, &bh)))
- return false;
- h = (struct elf_link_hash_entry *) bh;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && ! _bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
+ /* If this is a weak symbol, and there is a real definition, the
+ processor independent code will have arranged for us to see the
+ real definition first, and we can just use the same value. */
+ if (h->u.weakdef != NULL)
+ {
+ BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
+ || h->u.weakdef->root.type == bfd_link_hash_defweak);
+ h->root.u.def.section = h->u.weakdef->root.u.def.section;
+ h->root.u.def.value = h->u.weakdef->root.u.def.value;
+ return TRUE;
+ }
- elf_hash_table (info)->hgot = h;
+ /* This is a reference to a symbol defined by a dynamic object which
+ is not a function. The Alpha, since it uses .got entries for all
+ symbols even in regular objects, does not need the hackery of a
+ .dynbss section and COPY dynamic relocations. */
- return true;
+ return TRUE;
}
-\f
-/* Read ECOFF debugging information from a .mdebug section into a
- ecoff_debug_info structure. */
-static boolean
-elf64_alpha_read_ecoff_info (abfd, section, debug)
- bfd *abfd;
- asection *section;
- struct ecoff_debug_info *debug;
-{
- HDRR *symhdr;
- const struct ecoff_debug_swap *swap;
- char *ext_hdr = NULL;
+/* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
- swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
- memset (debug, 0, sizeof (*debug));
+static void
+elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry *h,
+ const Elf_Internal_Sym *isym,
+ bfd_boolean definition,
+ bfd_boolean dynamic)
+{
+ if (!dynamic && definition)
+ h->other = ((h->other & ELF_ST_VISIBILITY (-1))
+ | (isym->st_other & ~ELF_ST_VISIBILITY (-1)));
+}
- ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
- if (ext_hdr == NULL && swap->external_hdr_size != 0)
- goto error_return;
+/* Symbol versioning can create new symbols, and make our old symbols
+ indirect to the new ones. Consolidate the got and reloc information
+ in these situations. */
- if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
- swap->external_hdr_size))
- goto error_return;
+static void
+elf64_alpha_copy_indirect_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *dir,
+ struct elf_link_hash_entry *ind)
+{
+ struct alpha_elf_link_hash_entry *hi
+ = (struct alpha_elf_link_hash_entry *) ind;
+ struct alpha_elf_link_hash_entry *hs
+ = (struct alpha_elf_link_hash_entry *) dir;
- symhdr = &debug->symbolic_header;
- (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
+ /* Do the merging in the superclass. */
+ _bfd_elf_link_hash_copy_indirect(info, dir, ind);
- /* The symbolic header contains absolute file offsets and sizes to
- read. */
-#define READ(ptr, offset, count, size, type) \
- if (symhdr->count == 0) \
- debug->ptr = NULL; \
- else \
- { \
- bfd_size_type amt = (bfd_size_type) size * symhdr->count; \
- debug->ptr = (type) bfd_malloc (amt); \
- if (debug->ptr == NULL) \
- goto error_return; \
- if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
- || bfd_bread (debug->ptr, amt, abfd) != amt) \
- goto error_return; \
- }
+ /* Merge the flags. Whee. */
+ hs->flags |= hi->flags;
- READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
- READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
- READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
- READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
- READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
- READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
- union aux_ext *);
- READ (ss, cbSsOffset, issMax, sizeof (char), char *);
- READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
- READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
- READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
- READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
-#undef READ
+ /* ??? It's unclear to me what's really supposed to happen when
+ "merging" defweak and defined symbols, given that we don't
+ actually throw away the defweak. This more-or-less copies
+ the logic related to got and plt entries in the superclass. */
+ if (ind->root.type != bfd_link_hash_indirect)
+ return;
- debug->fdr = NULL;
- debug->adjust = NULL;
+ /* Merge the .got entries. Cannibalize the old symbol's list in
+ doing so, since we don't need it anymore. */
- return true;
+ if (hs->got_entries == NULL)
+ hs->got_entries = hi->got_entries;
+ else
+ {
+ struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
- error_return:
- if (ext_hdr != NULL)
- free (ext_hdr);
- if (debug->line != NULL)
- free (debug->line);
- if (debug->external_dnr != NULL)
- free (debug->external_dnr);
- if (debug->external_pdr != NULL)
- free (debug->external_pdr);
- if (debug->external_sym != NULL)
- free (debug->external_sym);
- if (debug->external_opt != NULL)
- free (debug->external_opt);
- if (debug->external_aux != NULL)
- free (debug->external_aux);
- if (debug->ss != NULL)
- free (debug->ss);
- if (debug->ssext != NULL)
- free (debug->ssext);
- if (debug->external_fdr != NULL)
- free (debug->external_fdr);
- if (debug->external_rfd != NULL)
- free (debug->external_rfd);
- if (debug->external_ext != NULL)
- free (debug->external_ext);
- return false;
-}
+ gsh = hs->got_entries;
+ for (gi = hi->got_entries; gi ; gi = gin)
+ {
+ gin = gi->next;
+ for (gs = gsh; gs ; gs = gs->next)
+ if (gi->gotobj == gs->gotobj
+ && gi->reloc_type == gs->reloc_type
+ && gi->addend == gs->addend)
+ {
+ gi->use_count += gs->use_count;
+ goto got_found;
+ }
+ gi->next = hs->got_entries;
+ hs->got_entries = gi;
+ got_found:;
+ }
+ }
+ hi->got_entries = NULL;
-/* Alpha ELF local labels start with '$'. */
+ /* And similar for the reloc entries. */
-static boolean
-elf64_alpha_is_local_label_name (abfd, name)
- bfd *abfd ATTRIBUTE_UNUSED;
- const char *name;
-{
- return name[0] == '$';
-}
+ if (hs->reloc_entries == NULL)
+ hs->reloc_entries = hi->reloc_entries;
+ else
+ {
+ struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
-/* Alpha ELF follows MIPS ELF in using a special find_nearest_line
- routine in order to handle the ECOFF debugging information. We
- still call this mips_elf_find_line because of the slot
- find_line_info in elf_obj_tdata is declared that way. */
+ rsh = hs->reloc_entries;
+ for (ri = hi->reloc_entries; ri ; ri = rin)
+ {
+ rin = ri->next;
+ for (rs = rsh; rs ; rs = rs->next)
+ if (ri->rtype == rs->rtype && ri->srel == rs->srel)
+ {
+ rs->count += ri->count;
+ goto found_reloc;
+ }
+ ri->next = hs->reloc_entries;
+ hs->reloc_entries = ri;
+ found_reloc:;
+ }
+ }
+ hi->reloc_entries = NULL;
+}
-struct mips_elf_find_line
-{
- struct ecoff_debug_info d;
- struct ecoff_find_line i;
-};
+/* Is it possible to merge two object file's .got tables? */
-static boolean
-elf64_alpha_find_nearest_line (abfd, section, symbols, offset, filename_ptr,
- functionname_ptr, line_ptr)
- bfd *abfd;
- asection *section;
- asymbol **symbols;
- bfd_vma offset;
- const char **filename_ptr;
- const char **functionname_ptr;
- unsigned int *line_ptr;
+static bfd_boolean
+elf64_alpha_can_merge_gots (bfd *a, bfd *b)
{
- asection *msec;
+ int total = alpha_elf_tdata (a)->total_got_size;
+ bfd *bsub;
- if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
- filename_ptr, functionname_ptr,
- line_ptr, 0,
- &elf_tdata (abfd)->dwarf2_find_line_info))
- return true;
+ /* Trivial quick fallout test. */
+ if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE)
+ return TRUE;
- msec = bfd_get_section_by_name (abfd, ".mdebug");
- if (msec != NULL)
- {
- flagword origflags;
- struct mips_elf_find_line *fi;
- const struct ecoff_debug_swap * const swap =
- get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
+ /* By their nature, local .got entries cannot be merged. */
+ if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE)
+ return FALSE;
- /* If we are called during a link, alpha_elf_final_link may have
- cleared the SEC_HAS_CONTENTS field. We force it back on here
- if appropriate (which it normally will be). */
- origflags = msec->flags;
- if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
- msec->flags |= SEC_HAS_CONTENTS;
+ /* Failing the common trivial comparison, we must effectively
+ perform the merge. Not actually performing the merge means that
+ we don't have to store undo information in case we fail. */
+ for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
+ {
+ struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
+ Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
+ int i, n;
- fi = elf_tdata (abfd)->find_line_info;
- if (fi == NULL)
+ n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
+ for (i = 0; i < n; ++i)
{
- bfd_size_type external_fdr_size;
- char *fraw_src;
- char *fraw_end;
- struct fdr *fdr_ptr;
- bfd_size_type amt = sizeof (struct mips_elf_find_line);
+ struct alpha_elf_got_entry *ae, *be;
+ struct alpha_elf_link_hash_entry *h;
- fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt);
- if (fi == NULL)
- {
- msec->flags = origflags;
- return false;
- }
+ h = hashes[i];
+ while (h->root.root.type == bfd_link_hash_indirect
+ || h->root.root.type == bfd_link_hash_warning)
+ h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
- if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
+ for (be = h->got_entries; be ; be = be->next)
{
- msec->flags = origflags;
- return false;
+ if (be->use_count == 0)
+ continue;
+ if (be->gotobj != b)
+ continue;
+
+ for (ae = h->got_entries; ae ; ae = ae->next)
+ if (ae->gotobj == a
+ && ae->reloc_type == be->reloc_type
+ && ae->addend == be->addend)
+ goto global_found;
+
+ total += alpha_got_entry_size (be->reloc_type);
+ if (total > MAX_GOT_SIZE)
+ return FALSE;
+ global_found:;
}
+ }
+ }
- /* Swap in the FDR information. */
- amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
- fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt);
- if (fi->d.fdr == NULL)
+ return TRUE;
+}
+
+/* Actually merge two .got tables. */
+
+static void
+elf64_alpha_merge_gots (bfd *a, bfd *b)
+{
+ int total = alpha_elf_tdata (a)->total_got_size;
+ bfd *bsub;
+
+ /* Remember local expansion. */
+ {
+ int e = alpha_elf_tdata (b)->local_got_size;
+ total += e;
+ alpha_elf_tdata (a)->local_got_size += e;
+ }
+
+ for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
+ {
+ struct alpha_elf_got_entry **local_got_entries;
+ struct alpha_elf_link_hash_entry **hashes;
+ Elf_Internal_Shdr *symtab_hdr;
+ int i, n;
+
+ /* Let the local .got entries know they are part of a new subsegment. */
+ local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
+ if (local_got_entries)
+ {
+ n = elf_tdata (bsub)->symtab_hdr.sh_info;
+ for (i = 0; i < n; ++i)
{
- msec->flags = origflags;
- return false;
+ struct alpha_elf_got_entry *ent;
+ for (ent = local_got_entries[i]; ent; ent = ent->next)
+ ent->gotobj = a;
}
- external_fdr_size = swap->external_fdr_size;
- fdr_ptr = fi->d.fdr;
- fraw_src = (char *) fi->d.external_fdr;
- fraw_end = (fraw_src
- + fi->d.symbolic_header.ifdMax * external_fdr_size);
- for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
- (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
+ }
- elf_tdata (abfd)->find_line_info = fi;
+ /* Merge the global .got entries. */
+ hashes = alpha_elf_sym_hashes (bsub);
+ symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
- /* Note that we don't bother to ever free this information.
- find_nearest_line is either called all the time, as in
- objdump -l, so the information should be saved, or it is
- rarely called, as in ld error messages, so the memory
- wasted is unimportant. Still, it would probably be a
- good idea for free_cached_info to throw it away. */
- }
+ n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
+ for (i = 0; i < n; ++i)
+ {
+ struct alpha_elf_got_entry *ae, *be, **pbe, **start;
+ struct alpha_elf_link_hash_entry *h;
- if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
- &fi->i, filename_ptr, functionname_ptr,
- line_ptr))
- {
- msec->flags = origflags;
- return true;
- }
+ h = hashes[i];
+ while (h->root.root.type == bfd_link_hash_indirect
+ || h->root.root.type == bfd_link_hash_warning)
+ h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
- msec->flags = origflags;
+ pbe = start = &h->got_entries;
+ while ((be = *pbe) != NULL)
+ {
+ if (be->use_count == 0)
+ {
+ *pbe = be->next;
+ memset (be, 0xa5, sizeof (*be));
+ goto kill;
+ }
+ if (be->gotobj != b)
+ goto next;
+
+ for (ae = *start; ae ; ae = ae->next)
+ if (ae->gotobj == a
+ && ae->reloc_type == be->reloc_type
+ && ae->addend == be->addend)
+ {
+ ae->flags |= be->flags;
+ ae->use_count += be->use_count;
+ *pbe = be->next;
+ memset (be, 0xa5, sizeof (*be));
+ goto kill;
+ }
+ be->gotobj = a;
+ total += alpha_got_entry_size (be->reloc_type);
+
+ next:;
+ pbe = &be->next;
+ kill:;
+ }
+ }
+
+ alpha_elf_tdata (bsub)->gotobj = a;
}
+ alpha_elf_tdata (a)->total_got_size = total;
- /* Fall back on the generic ELF find_nearest_line routine. */
+ /* Merge the two in_got chains. */
+ {
+ bfd *next;
- return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
- filename_ptr, functionname_ptr,
- line_ptr);
+ bsub = a;
+ while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
+ bsub = next;
+
+ alpha_elf_tdata (bsub)->in_got_link_next = b;
+ }
}
-\f
-/* Structure used to pass information to alpha_elf_output_extsym. */
-struct extsym_info
+/* Calculate the offsets for the got entries. */
+
+static bfd_boolean
+elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h,
+ PTR arg ATTRIBUTE_UNUSED)
{
- bfd *abfd;
- struct bfd_link_info *info;
- struct ecoff_debug_info *debug;
- const struct ecoff_debug_swap *swap;
- boolean failed;
-};
+ struct alpha_elf_got_entry *gotent;
+
+ for (gotent = h->got_entries; gotent; gotent = gotent->next)
+ if (gotent->use_count > 0)
+ {
+ struct alpha_elf_obj_tdata *td;
+ bfd_size_type *plge;
+
+ td = alpha_elf_tdata (gotent->gotobj);
+ plge = &td->got->size;
+ gotent->got_offset = *plge;
+ *plge += alpha_got_entry_size (gotent->reloc_type);
+ }
+
+ return TRUE;
+}
-static boolean
-elf64_alpha_output_extsym (h, data)
- struct alpha_elf_link_hash_entry *h;
- PTR data;
+static void
+elf64_alpha_calc_got_offsets (struct bfd_link_info *info)
{
- struct extsym_info *einfo = (struct extsym_info *) data;
- boolean strip;
- asection *sec, *output_section;
+ bfd *i, *got_list;
+ struct alpha_elf_link_hash_table * htab;
- if (h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return;
+ got_list = htab->got_list;
- if (h->root.indx == -2)
- strip = false;
- else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
- && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
- && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
- strip = true;
- else if (einfo->info->strip == strip_all
- || (einfo->info->strip == strip_some
- && bfd_hash_lookup (einfo->info->keep_hash,
- h->root.root.root.string,
- false, false) == NULL))
- strip = true;
- else
- strip = false;
+ /* First, zero out the .got sizes, as we may be recalculating the
+ .got after optimizing it. */
+ for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
+ alpha_elf_tdata(i)->got->size = 0;
- if (strip)
- return true;
+ /* Next, fill in the offsets for all the global entries. */
+ alpha_elf_link_hash_traverse (htab,
+ elf64_alpha_calc_got_offsets_for_symbol,
+ NULL);
- if (h->esym.ifd == -2)
+ /* Finally, fill in the offsets for the local entries. */
+ for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
{
- h->esym.jmptbl = 0;
- h->esym.cobol_main = 0;
- h->esym.weakext = 0;
- h->esym.reserved = 0;
- h->esym.ifd = ifdNil;
- h->esym.asym.value = 0;
- h->esym.asym.st = stGlobal;
+ bfd_size_type got_offset = alpha_elf_tdata(i)->got->size;
+ bfd *j;
+
+ for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
+ {
+ struct alpha_elf_got_entry **local_got_entries, *gotent;
+ int k, n;
+
+ local_got_entries = alpha_elf_tdata(j)->local_got_entries;
+ if (!local_got_entries)
+ continue;
+
+ for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
+ for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
+ if (gotent->use_count > 0)
+ {
+ gotent->got_offset = got_offset;
+ got_offset += alpha_got_entry_size (gotent->reloc_type);
+ }
+ }
+
+ alpha_elf_tdata(i)->got->size = got_offset;
+ }
+}
+
+/* Constructs the gots. */
- if (h->root.root.type != bfd_link_hash_defined
- && h->root.root.type != bfd_link_hash_defweak)
- h->esym.asym.sc = scAbs;
- else
+static bfd_boolean
+elf64_alpha_size_got_sections (struct bfd_link_info *info)
+{
+ bfd *i, *got_list, *cur_got_obj = NULL;
+ struct alpha_elf_link_hash_table * htab;
+
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
+ got_list = htab->got_list;
+
+ /* On the first time through, pretend we have an existing got list
+ consisting of all of the input files. */
+ if (got_list == NULL)
+ {
+ for (i = info->input_bfds; i ; i = i->link_next)
{
- const char *name;
+ bfd *this_got;
- sec = h->root.root.u.def.section;
- output_section = sec->output_section;
+ if (! is_alpha_elf (i))
+ continue;
- /* When making a shared library and symbol h is the one from
- the another shared library, OUTPUT_SECTION may be null. */
- if (output_section == NULL)
- h->esym.asym.sc = scUndefined;
- else
- {
- name = bfd_section_name (output_section->owner, output_section);
+ this_got = alpha_elf_tdata (i)->gotobj;
+ if (this_got == NULL)
+ continue;
- if (strcmp (name, ".text") == 0)
- h->esym.asym.sc = scText;
- else if (strcmp (name, ".data") == 0)
- h->esym.asym.sc = scData;
- else if (strcmp (name, ".sdata") == 0)
- h->esym.asym.sc = scSData;
- else if (strcmp (name, ".rodata") == 0
- || strcmp (name, ".rdata") == 0)
- h->esym.asym.sc = scRData;
- else if (strcmp (name, ".bss") == 0)
- h->esym.asym.sc = scBss;
- else if (strcmp (name, ".sbss") == 0)
- h->esym.asym.sc = scSBss;
- else if (strcmp (name, ".init") == 0)
- h->esym.asym.sc = scInit;
- else if (strcmp (name, ".fini") == 0)
- h->esym.asym.sc = scFini;
- else
- h->esym.asym.sc = scAbs;
+ /* We are assuming no merging has yet occurred. */
+ BFD_ASSERT (this_got == i);
+
+ if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE)
+ {
+ /* Yikes! A single object file has too many entries. */
+ (*_bfd_error_handler)
+ (_("%B: .got subsegment exceeds 64K (size %d)"),
+ i, alpha_elf_tdata (this_got)->total_got_size);
+ return FALSE;
}
+
+ if (got_list == NULL)
+ got_list = this_got;
+ else
+ alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
+ cur_got_obj = this_got;
}
- h->esym.asym.reserved = 0;
- h->esym.asym.index = indexNil;
+ /* Strange degenerate case of no got references. */
+ if (got_list == NULL)
+ return TRUE;
+
+ htab->got_list = got_list;
}
- if (h->root.root.type == bfd_link_hash_common)
- h->esym.asym.value = h->root.root.u.c.size;
- else if (h->root.root.type == bfd_link_hash_defined
- || h->root.root.type == bfd_link_hash_defweak)
- {
- if (h->esym.asym.sc == scCommon)
- h->esym.asym.sc = scBss;
- else if (h->esym.asym.sc == scSCommon)
- h->esym.asym.sc = scSBss;
+ cur_got_obj = got_list;
+ if (cur_got_obj == NULL)
+ return FALSE;
- sec = h->root.root.u.def.section;
- output_section = sec->output_section;
- if (output_section != NULL)
- h->esym.asym.value = (h->root.root.u.def.value
- + sec->output_offset
- + output_section->vma);
- else
- h->esym.asym.value = 0;
- }
- else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
+ i = alpha_elf_tdata(cur_got_obj)->got_link_next;
+ while (i != NULL)
{
- /* Set type and value for a symbol with a function stub. */
- h->esym.asym.st = stProc;
- sec = bfd_get_section_by_name (einfo->abfd, ".plt");
- if (sec == NULL)
- h->esym.asym.value = 0;
+ if (elf64_alpha_can_merge_gots (cur_got_obj, i))
+ {
+ elf64_alpha_merge_gots (cur_got_obj, i);
+
+ alpha_elf_tdata(i)->got->size = 0;
+ i = alpha_elf_tdata(i)->got_link_next;
+ alpha_elf_tdata(cur_got_obj)->got_link_next = i;
+ }
else
{
- output_section = sec->output_section;
- if (output_section != NULL)
- h->esym.asym.value = (h->root.plt.offset
- + sec->output_offset
- + output_section->vma);
- else
- h->esym.asym.value = 0;
+ cur_got_obj = i;
+ i = alpha_elf_tdata(i)->got_link_next;
}
}
- if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
- h->root.root.root.string,
- &h->esym))
- {
- einfo->failed = true;
- return false;
- }
+ /* Once the gots have been merged, fill in the got offsets for
+ everything therein. */
+ elf64_alpha_calc_got_offsets (info);
- return true;
+ return TRUE;
}
-\f
-/* Search for and possibly create a got entry. */
-static struct alpha_elf_got_entry *
-get_got_entry (abfd, h, r_type, r_symndx, r_addend)
- bfd *abfd;
- struct alpha_elf_link_hash_entry *h;
- unsigned long r_type, r_symndx;
- bfd_vma r_addend;
+static bfd_boolean
+elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h, PTR data)
{
+ asection *splt = (asection *) data;
struct alpha_elf_got_entry *gotent;
- struct alpha_elf_got_entry **slot;
+ bfd_boolean saw_one = FALSE;
- if (h)
- slot = &h->got_entries;
- else
- {
- /* This is a local .got entry -- record for merge. */
+ /* If we didn't need an entry before, we still don't. */
+ if (!h->root.needs_plt)
+ return TRUE;
- struct alpha_elf_got_entry **local_got_entries;
+ /* For each LITERAL got entry still in use, allocate a plt entry. */
+ for (gotent = h->got_entries; gotent ; gotent = gotent->next)
+ if (gotent->reloc_type == R_ALPHA_LITERAL
+ && gotent->use_count > 0)
+ {
+ if (splt->size == 0)
+ splt->size = PLT_HEADER_SIZE;
+ gotent->plt_offset = splt->size;
+ splt->size += PLT_ENTRY_SIZE;
+ saw_one = TRUE;
+ }
- local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
- if (!local_got_entries)
- {
- bfd_size_type size;
- Elf_Internal_Shdr *symtab_hdr;
+ /* If there weren't any, there's no longer a need for the PLT entry. */
+ if (!saw_one)
+ h->root.needs_plt = FALSE;
- symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
- size = symtab_hdr->sh_info;
- size *= sizeof (struct alpha_elf_got_entry *);
+ return TRUE;
+}
- local_got_entries
- = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size);
- if (!local_got_entries)
- return NULL;
+/* Called from relax_section to rebuild the PLT in light of potential changes
+ in the function's status. */
- alpha_elf_tdata (abfd)->local_got_entries = local_got_entries;
- }
+static void
+elf64_alpha_size_plt_section (struct bfd_link_info *info)
+{
+ asection *splt, *spltrel, *sgotplt;
+ unsigned long entries;
+ bfd *dynobj;
+ struct alpha_elf_link_hash_table * htab;
- slot = &local_got_entries[r_symndx];
- }
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return;
- for (gotent = *slot; gotent ; gotent = gotent->next)
- if (gotent->gotobj == abfd
- && gotent->reloc_type == r_type
- && gotent->addend == r_addend)
- break;
+ dynobj = elf_hash_table(info)->dynobj;
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ if (splt == NULL)
+ return;
- if (!gotent)
+ splt->size = 0;
+
+ alpha_elf_link_hash_traverse (htab,
+ elf64_alpha_size_plt_section_1, splt);
+
+ /* Every plt entry requires a JMP_SLOT relocation. */
+ spltrel = bfd_get_section_by_name (dynobj, ".rela.plt");
+ entries = 0;
+ if (splt->size)
{
- int entry_size;
- bfd_size_type amt;
+ if (elf64_alpha_use_secureplt)
+ entries = (splt->size - NEW_PLT_HEADER_SIZE) / NEW_PLT_ENTRY_SIZE;
+ else
+ entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE;
+ }
+ spltrel->size = entries * sizeof (Elf64_External_Rela);
- amt = sizeof (struct alpha_elf_got_entry);
- gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt);
- if (!gotent)
- return NULL;
+ /* When using the secureplt, we need two words somewhere in the data
+ segment for the dynamic linker to tell us where to go. This is the
+ entire contents of the .got.plt section. */
+ if (elf64_alpha_use_secureplt)
+ {
+ sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
+ sgotplt->size = entries ? 16 : 0;
+ }
+}
- gotent->gotobj = abfd;
- gotent->addend = r_addend;
- gotent->got_offset = -1;
- gotent->use_count = 1;
- gotent->reloc_type = r_type;
- gotent->reloc_done = 0;
- gotent->reloc_xlated = 0;
+static bfd_boolean
+elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ bfd *i;
+ struct alpha_elf_link_hash_table * htab;
- gotent->next = *slot;
- *slot = gotent;
+ if (info->relocatable)
+ return TRUE;
- entry_size = alpha_got_entry_size (r_type);
- alpha_elf_tdata (abfd)->total_got_size += entry_size;
- if (!h)
- alpha_elf_tdata(abfd)->local_got_size += entry_size;
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
+
+ if (!elf64_alpha_size_got_sections (info))
+ return FALSE;
+
+ /* Allocate space for all of the .got subsections. */
+ i = htab->got_list;
+ for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
+ {
+ asection *s = alpha_elf_tdata(i)->got;
+ if (s->size > 0)
+ {
+ s->contents = (bfd_byte *) bfd_zalloc (i, s->size);
+ if (s->contents == NULL)
+ return FALSE;
+ }
}
- else
- gotent->use_count += 1;
- return gotent;
+ return TRUE;
}
-/* Handle dynamic relocations when doing an Alpha ELF link. */
+/* The number of dynamic relocations required by a static relocation. */
-static boolean
-elf64_alpha_check_relocs (abfd, info, sec, relocs)
- bfd *abfd;
- struct bfd_link_info *info;
- asection *sec;
- const Elf_Internal_Rela *relocs;
+static int
+alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared, int pie)
{
- bfd *dynobj;
- asection *sreloc;
- const char *rel_sec_name;
- Elf_Internal_Shdr *symtab_hdr;
- struct alpha_elf_link_hash_entry **sym_hashes;
- const Elf_Internal_Rela *rel, *relend;
- boolean got_created;
- bfd_size_type amt;
+ switch (r_type)
+ {
+ /* May appear in GOT entries. */
+ case R_ALPHA_TLSGD:
+ return (dynamic ? 2 : shared ? 1 : 0);
+ case R_ALPHA_TLSLDM:
+ return shared;
+ case R_ALPHA_LITERAL:
+ return dynamic || shared;
+ case R_ALPHA_GOTTPREL:
+ return dynamic || (shared && !pie);
+ case R_ALPHA_GOTDTPREL:
+ return dynamic;
- if (info->relocateable)
- return true;
+ /* May appear in data sections. */
+ case R_ALPHA_REFLONG:
+ case R_ALPHA_REFQUAD:
+ return dynamic || shared;
+ case R_ALPHA_TPREL64:
+ return dynamic || (shared && !pie);
- dynobj = elf_hash_table(info)->dynobj;
- if (dynobj == NULL)
- elf_hash_table(info)->dynobj = dynobj = abfd;
+ /* Everything else is illegal. We'll issue an error during
+ relocate_section. */
+ default:
+ return 0;
+ }
+}
- sreloc = NULL;
- rel_sec_name = NULL;
- symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
- sym_hashes = alpha_elf_sym_hashes(abfd);
- got_created = false;
+/* Work out the sizes of the dynamic relocation entries. */
- relend = relocs + sec->reloc_count;
- for (rel = relocs; rel < relend; ++rel)
- {
- enum {
- NEED_GOT = 1,
- NEED_GOT_ENTRY = 2,
- NEED_DYNREL = 4
- };
+static bfd_boolean
+elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry *h,
+ struct bfd_link_info *info)
+{
+ bfd_boolean dynamic;
+ struct alpha_elf_reloc_entry *relent;
+ unsigned long entries;
+
+ /* If the symbol was defined as a common symbol in a regular object
+ file, and there was no definition in any dynamic object, then the
+ linker will have allocated space for the symbol in a common
+ section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
+ set. This is done for dynamic symbols in
+ elf_adjust_dynamic_symbol but this is not done for non-dynamic
+ symbols, somehow. */
+ if (!h->root.def_regular
+ && h->root.ref_regular
+ && !h->root.def_dynamic
+ && (h->root.root.type == bfd_link_hash_defined
+ || h->root.root.type == bfd_link_hash_defweak)
+ && !(h->root.root.u.def.section->owner->flags & DYNAMIC))
+ h->root.def_regular = 1;
+
+ /* If the symbol is dynamic, we'll need all the relocations in their
+ natural form. If this is a shared object, and it has been forced
+ local, we'll need the same number of RELATIVE relocations. */
+ dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
- unsigned long r_symndx, r_type;
- struct alpha_elf_link_hash_entry *h;
- unsigned int gotent_flags;
- boolean maybe_dynamic;
- unsigned int need;
- bfd_vma addend;
+ /* If the symbol is a hidden undefined weak, then we never have any
+ relocations. Avoid the loop which may want to add RELATIVE relocs
+ based on info->shared. */
+ if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
+ return TRUE;
- r_symndx = ELF64_R_SYM (rel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- else
+ for (relent = h->reloc_entries; relent; relent = relent->next)
+ {
+ entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic,
+ info->shared, info->pie);
+ if (entries)
{
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ relent->srel->size +=
+ entries * sizeof (Elf64_External_Rela) * relent->count;
+ if (relent->reltext)
+ info->flags |= DT_TEXTREL;
+ }
+ }
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+ return TRUE;
+}
- h->root.elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
- }
+/* Subroutine of elf64_alpha_size_rela_got_section for doing the
+ global symbols. */
- /* We can only get preliminary data on whether a symbol is
- locally or externally defined, as not all of the input files
- have yet been processed. Do something with what we know, as
- this may help reduce memory usage and processing time later. */
- maybe_dynamic = false;
- if (h && ((info->shared
- && (!info->symbolic || info->allow_shlib_undefined))
- || ! (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
- || h->root.root.type == bfd_link_hash_defweak))
- maybe_dynamic = true;
+static bfd_boolean
+elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry *h,
+ struct bfd_link_info *info)
+{
+ bfd_boolean dynamic;
+ struct alpha_elf_got_entry *gotent;
+ unsigned long entries;
- need = 0;
- gotent_flags = 0;
- r_type = ELF64_R_TYPE (rel->r_info);
- addend = rel->r_addend;
+ /* If we're using a plt for this symbol, then all of its relocations
+ for its got entries go into .rela.plt. */
+ if (h->root.needs_plt)
+ return TRUE;
- switch (r_type)
- {
- case R_ALPHA_LITERAL:
- need = NEED_GOT | NEED_GOT_ENTRY;
+ /* If the symbol is dynamic, we'll need all the relocations in their
+ natural form. If this is a shared object, and it has been forced
+ local, we'll need the same number of RELATIVE relocations. */
+ dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
- /* Remember how this literal is used from its LITUSEs.
- This will be important when it comes to decide if we can
- create a .plt entry for a function symbol. */
- while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE)
- if (rel->r_addend >= 1 && rel->r_addend <= 5)
- gotent_flags |= 1 << rel->r_addend;
- --rel;
+ /* If the symbol is a hidden undefined weak, then we never have any
+ relocations. Avoid the loop which may want to add RELATIVE relocs
+ based on info->shared. */
+ if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
+ return TRUE;
- /* No LITUSEs -- presumably the address is used somehow. */
- if (gotent_flags == 0)
- gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
- break;
+ entries = 0;
+ for (gotent = h->got_entries; gotent ; gotent = gotent->next)
+ if (gotent->use_count > 0)
+ entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type, dynamic,
+ info->shared, info->pie);
- case R_ALPHA_GPDISP:
- case R_ALPHA_GPREL16:
- case R_ALPHA_GPREL32:
- case R_ALPHA_GPRELHIGH:
- case R_ALPHA_GPRELLOW:
- case R_ALPHA_BRSGP:
- need = NEED_GOT;
- break;
+ if (entries > 0)
+ {
+ bfd *dynobj = elf_hash_table(info)->dynobj;
+ asection *srel = bfd_get_section_by_name (dynobj, ".rela.got");
+ BFD_ASSERT (srel != NULL);
+ srel->size += sizeof (Elf64_External_Rela) * entries;
+ }
- case R_ALPHA_REFLONG:
- case R_ALPHA_REFQUAD:
- if ((info->shared && (sec->flags & SEC_ALLOC)) || maybe_dynamic)
- need = NEED_DYNREL;
- break;
+ return TRUE;
+}
- case R_ALPHA_TLSGD:
- case R_ALPHA_TLSLDM:
- case R_ALPHA_GOTDTPREL:
- need = NEED_GOT | NEED_GOT_ENTRY;
- break;
+/* Set the sizes of the dynamic relocation sections. */
- case R_ALPHA_GOTTPREL:
- need = NEED_GOT | NEED_GOT_ENTRY;
- gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE;
- if (info->shared)
- info->flags |= DF_STATIC_TLS;
- break;
+static void
+elf64_alpha_size_rela_got_section (struct bfd_link_info *info)
+{
+ unsigned long entries;
+ bfd *i, *dynobj;
+ asection *srel;
+ struct alpha_elf_link_hash_table * htab;
- case R_ALPHA_TPREL64:
- if (info->shared || maybe_dynamic)
- need = NEED_DYNREL;
- if (info->shared)
- info->flags |= DF_STATIC_TLS;
- break;
- }
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return;
- if (need & NEED_GOT)
+ /* Shared libraries often require RELATIVE relocs, and some relocs
+ require attention for the main application as well. */
+
+ entries = 0;
+ for (i = htab->got_list;
+ i ; i = alpha_elf_tdata(i)->got_link_next)
+ {
+ bfd *j;
+
+ for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
{
- if (!got_created)
- {
- if (!elf64_alpha_create_got_section (abfd, info))
- return false;
+ struct alpha_elf_got_entry **local_got_entries, *gotent;
+ int k, n;
- /* Make sure the object's gotobj is set to itself so
- that we default to every object with its own .got.
- We'll merge .gots later once we've collected each
- object's info. */
- alpha_elf_tdata(abfd)->gotobj = abfd;
+ local_got_entries = alpha_elf_tdata(j)->local_got_entries;
+ if (!local_got_entries)
+ continue;
- got_created = 1;
- }
+ for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
+ for (gotent = local_got_entries[k];
+ gotent ; gotent = gotent->next)
+ if (gotent->use_count > 0)
+ entries += (alpha_dynamic_entries_for_reloc
+ (gotent->reloc_type, 0, info->shared, info->pie));
}
+ }
- if (need & NEED_GOT_ENTRY)
- {
- struct alpha_elf_got_entry *gotent;
+ dynobj = elf_hash_table(info)->dynobj;
+ srel = bfd_get_section_by_name (dynobj, ".rela.got");
+ if (!srel)
+ {
+ BFD_ASSERT (entries == 0);
+ return;
+ }
+ srel->size = sizeof (Elf64_External_Rela) * entries;
- gotent = get_got_entry (abfd, h, r_type, r_symndx, addend);
- if (!gotent)
- return false;
+ /* Now do the non-local symbols. */
+ alpha_elf_link_hash_traverse (htab,
+ elf64_alpha_size_rela_got_1, info);
+}
- if (gotent_flags)
- {
- gotent->flags |= gotent_flags;
- if (h)
- {
- gotent_flags |= h->flags;
- h->flags = gotent_flags;
+/* Set the sizes of the dynamic sections. */
- /* Make a guess as to whether a .plt entry is needed. */
- if ((gotent_flags & ALPHA_ELF_LINK_HASH_LU_FUNC)
- && !(gotent_flags & ~ALPHA_ELF_LINK_HASH_LU_FUNC))
- h->root.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
- else
- h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
- }
- }
- }
+static bfd_boolean
+elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ bfd *dynobj;
+ asection *s;
+ bfd_boolean relplt;
+ struct alpha_elf_link_hash_table * htab;
- if (need & NEED_DYNREL)
- {
- if (rel_sec_name == NULL)
- {
- rel_sec_name = (bfd_elf_string_from_elf_section
- (abfd, elf_elfheader(abfd)->e_shstrndx,
- elf_section_data(sec)->rel_hdr.sh_name));
- if (rel_sec_name == NULL)
- return false;
-
- BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0
- && strcmp (bfd_get_section_name (abfd, sec),
- rel_sec_name+5) == 0);
- }
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
- /* We need to create the section here now whether we eventually
- use it or not so that it gets mapped to an output section by
- the linker. If not used, we'll kill it in
- size_dynamic_sections. */
- if (sreloc == NULL)
- {
- sreloc = bfd_get_section_by_name (dynobj, rel_sec_name);
- if (sreloc == NULL)
- {
- flagword flags;
-
- sreloc = bfd_make_section (dynobj, rel_sec_name);
- flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED | SEC_READONLY);
- if (sec->flags & SEC_ALLOC)
- flags |= SEC_ALLOC | SEC_LOAD;
- if (sreloc == NULL
- || !bfd_set_section_flags (dynobj, sreloc, flags)
- || !bfd_set_section_alignment (dynobj, sreloc, 3))
- return false;
- }
- }
+ dynobj = elf_hash_table(info)->dynobj;
+ BFD_ASSERT(dynobj != NULL);
- if (h)
- {
- /* Since we havn't seen all of the input symbols yet, we
- don't know whether we'll actually need a dynamic relocation
- entry for this reloc. So make a record of it. Once we
- find out if this thing needs dynamic relocation we'll
- expand the relocation sections by the appropriate amount. */
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ /* Set the contents of the .interp section to the interpreter. */
+ if (info->executable)
+ {
+ s = bfd_get_section_by_name (dynobj, ".interp");
+ BFD_ASSERT (s != NULL);
+ s->size = sizeof ELF_DYNAMIC_INTERPRETER;
+ s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+ }
- struct alpha_elf_reloc_entry *rent;
+ /* Now that we've seen all of the input files, we can decide which
+ symbols need dynamic relocation entries and which don't. We've
+ collected information in check_relocs that we can now apply to
+ size the dynamic relocation sections. */
+ alpha_elf_link_hash_traverse (htab,
+ elf64_alpha_calc_dynrel_sizes, info);
- for (rent = h->reloc_entries; rent; rent = rent->next)
- if (rent->rtype == r_type && rent->srel == sreloc)
- break;
+ elf64_alpha_size_rela_got_section (info);
+ elf64_alpha_size_plt_section (info);
+ }
+ /* else we're not dynamic and by definition we don't need such things. */
- if (!rent)
- {
- amt = sizeof (struct alpha_elf_reloc_entry);
- rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
- if (!rent)
- return false;
+ /* The check_relocs and adjust_dynamic_symbol entry points have
+ determined the sizes of the various dynamic sections. Allocate
+ memory for them. */
+ relplt = FALSE;
+ for (s = dynobj->sections; s != NULL; s = s->next)
+ {
+ const char *name;
- rent->srel = sreloc;
- rent->rtype = r_type;
- rent->count = 1;
- rent->reltext = ((sec->flags & (SEC_READONLY | SEC_ALLOC))
- == (SEC_READONLY | SEC_ALLOC));
+ if (!(s->flags & SEC_LINKER_CREATED))
+ continue;
- rent->next = h->reloc_entries;
- h->reloc_entries = rent;
- }
- else
- rent->count++;
- }
- else if (info->shared)
+ /* It's OK to base decisions on the section name, because none
+ of the dynobj section names depend upon the input files. */
+ name = bfd_get_section_name (dynobj, s);
+
+ if (CONST_STRNEQ (name, ".rela"))
+ {
+ if (s->size != 0)
{
- /* If this is a shared library, and the section is to be
- loaded into memory, we need a RELATIVE reloc. */
- sreloc->_raw_size += sizeof (Elf64_External_Rela);
- if ((sec->flags & (SEC_READONLY | SEC_ALLOC))
- == (SEC_READONLY | SEC_ALLOC))
- info->flags |= DF_TEXTREL;
+ if (strcmp (name, ".rela.plt") == 0)
+ relplt = TRUE;
+
+ /* We use the reloc_count field as a counter if we need
+ to copy relocs into the output file. */
+ s->reloc_count = 0;
}
}
- }
-
- return true;
-}
-
-/* Adjust a symbol defined by a dynamic object and referenced by a
- regular object. The current definition is in some section of the
- dynamic object, but we're not including those sections. We have to
- change the definition to something the rest of the link can
- understand. */
-
-static boolean
-elf64_alpha_adjust_dynamic_symbol (info, h)
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
-{
- bfd *dynobj;
- asection *s;
- struct alpha_elf_link_hash_entry *ah;
+ else if (! CONST_STRNEQ (name, ".got")
+ && strcmp (name, ".plt") != 0
+ && strcmp (name, ".dynbss") != 0)
+ {
+ /* It's not one of our dynamic sections, so don't allocate space. */
+ continue;
+ }
- dynobj = elf_hash_table(info)->dynobj;
- ah = (struct alpha_elf_link_hash_entry *)h;
+ if (s->size == 0)
+ {
+ /* If we don't need this section, strip it from the output file.
+ This is to handle .rela.bss and .rela.plt. We must create it
+ in create_dynamic_sections, because it must be created before
+ the linker maps input sections to output sections. The
+ linker does that before adjust_dynamic_symbol is called, and
+ it is that function which decides whether anything needs to
+ go into these sections. */
+ if (!CONST_STRNEQ (name, ".got"))
+ s->flags |= SEC_EXCLUDE;
+ }
+ else if ((s->flags & SEC_HAS_CONTENTS) != 0)
+ {
+ /* Allocate memory for the section contents. */
+ s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
+ if (s->contents == NULL)
+ return FALSE;
+ }
+ }
- /* Now that we've seen all of the input symbols, finalize our decision
- about whether this symbol should get a .plt entry. */
-
- if (alpha_elf_dynamic_symbol_p (h, info)
- && ((h->type == STT_FUNC
- && !(ah->flags & ALPHA_ELF_LINK_HASH_LU_ADDR))
- || (h->type == STT_NOTYPE
- && (ah->flags & ALPHA_ELF_LINK_HASH_LU_FUNC)
- && !(ah->flags & ~ALPHA_ELF_LINK_HASH_LU_FUNC)))
- /* Don't prevent otherwise valid programs from linking by attempting
- to create a new .got entry somewhere. A Correct Solution would be
- to add a new .got section to a new object file and let it be merged
- somewhere later. But for now don't bother. */
- && ah->got_entries)
+ if (elf_hash_table (info)->dynamic_sections_created)
{
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
+ /* Add some entries to the .dynamic section. We fill in the
+ values later, in elf64_alpha_finish_dynamic_sections, but we
+ must add the entries now so that we get the correct size for
+ the .dynamic section. The DT_DEBUG entry is filled in by the
+ dynamic linker and used by the debugger. */
+#define add_dynamic_entry(TAG, VAL) \
+ _bfd_elf_add_dynamic_entry (info, TAG, VAL)
- s = bfd_get_section_by_name(dynobj, ".plt");
- if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
- return false;
+ if (info->executable)
+ {
+ if (!add_dynamic_entry (DT_DEBUG, 0))
+ return FALSE;
+ }
+
+ if (relplt)
+ {
+ if (!add_dynamic_entry (DT_PLTGOT, 0)
+ || !add_dynamic_entry (DT_PLTRELSZ, 0)
+ || !add_dynamic_entry (DT_PLTREL, DT_RELA)
+ || !add_dynamic_entry (DT_JMPREL, 0))
+ return FALSE;
- /* The first bit of the .plt is reserved. */
- if (s->_raw_size == 0)
- s->_raw_size = PLT_HEADER_SIZE;
+ if (elf64_alpha_use_secureplt
+ && !add_dynamic_entry (DT_ALPHA_PLTRO, 1))
+ return FALSE;
+ }
- h->plt.offset = s->_raw_size;
- s->_raw_size += PLT_ENTRY_SIZE;
+ if (!add_dynamic_entry (DT_RELA, 0)
+ || !add_dynamic_entry (DT_RELASZ, 0)
+ || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
+ return FALSE;
- /* If this symbol is not defined in a regular file, and we are not
- generating a shared library, then set the symbol to the location
- in the .plt. This is required to make function pointers compare
- equal between the normal executable and the shared library. */
- if (! info->shared
- && h->root.type != bfd_link_hash_defweak)
+ if (info->flags & DF_TEXTREL)
{
- h->root.u.def.section = s;
- h->root.u.def.value = h->plt.offset;
+ if (!add_dynamic_entry (DT_TEXTREL, 0))
+ return FALSE;
}
+ }
+#undef add_dynamic_entry
- /* We also need a JMP_SLOT entry in the .rela.plt section. */
- s = bfd_get_section_by_name (dynobj, ".rela.plt");
- BFD_ASSERT (s != NULL);
- s->_raw_size += sizeof (Elf64_External_Rela);
+ return TRUE;
+}
+\f
+/* These functions do relaxation for Alpha ELF.
- return true;
- }
- else
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
+ Currently I'm only handling what I can do with existing compiler
+ and assembler support, which means no instructions are removed,
+ though some may be nopped. At this time GCC does not emit enough
+ information to do all of the relaxing that is possible. It will
+ take some not small amount of work for that to happen.
- /* If this is a weak symbol, and there is a real definition, the
- processor independent code will have arranged for us to see the
- real definition first, and we can just use the same value. */
- if (h->weakdef != NULL)
- {
- BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
- || h->weakdef->root.type == bfd_link_hash_defweak);
- h->root.u.def.section = h->weakdef->root.u.def.section;
- h->root.u.def.value = h->weakdef->root.u.def.value;
- return true;
- }
+ There are a couple of interesting papers that I once read on this
+ subject, that I cannot find references to at the moment, that
+ related to Alpha in particular. They are by David Wall, then of
+ DEC WRL. */
- /* This is a reference to a symbol defined by a dynamic object which
- is not a function. The Alpha, since it uses .got entries for all
- symbols even in regular objects, does not need the hackery of a
- .dynbss section and COPY dynamic relocations. */
+struct alpha_relax_info
+{
+ bfd *abfd;
+ asection *sec;
+ bfd_byte *contents;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Rela *relocs, *relend;
+ struct bfd_link_info *link_info;
+ bfd_vma gp;
+ bfd *gotobj;
+ asection *tsec;
+ struct alpha_elf_link_hash_entry *h;
+ struct alpha_elf_got_entry **first_gotent;
+ struct alpha_elf_got_entry *gotent;
+ bfd_boolean changed_contents;
+ bfd_boolean changed_relocs;
+ unsigned char other;
+};
- return true;
+static Elf_Internal_Rela *
+elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela *rel,
+ Elf_Internal_Rela *relend,
+ bfd_vma offset, int type)
+{
+ while (rel < relend)
+ {
+ if (rel->r_offset == offset
+ && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
+ return rel;
+ ++rel;
+ }
+ return NULL;
}
-/* Symbol versioning can create new symbols, and make our old symbols
- indirect to the new ones. Consolidate the got and reloc information
- in these situations. */
-
-static boolean
-elf64_alpha_merge_ind_symbols (hi, dummy)
- struct alpha_elf_link_hash_entry *hi;
- PTR dummy ATTRIBUTE_UNUSED;
+static bfd_boolean
+elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval,
+ Elf_Internal_Rela *irel, unsigned long r_type)
{
- struct alpha_elf_link_hash_entry *hs;
+ unsigned int insn;
+ bfd_signed_vma disp;
- if (hi->root.root.type != bfd_link_hash_indirect)
- return true;
- hs = hi;
- do {
- hs = (struct alpha_elf_link_hash_entry *)hs->root.root.u.i.link;
- } while (hs->root.root.type == bfd_link_hash_indirect);
+ /* Get the instruction. */
+ insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
- /* Merge the flags. Whee. */
+ if (insn >> 26 != OP_LDQ)
+ {
+ reloc_howto_type *howto = elf64_alpha_howto_table + r_type;
+ ((*_bfd_error_handler)
+ ("%B: %A+0x%lx: warning: %s relocation against unexpected insn",
+ info->abfd, info->sec,
+ (unsigned long) irel->r_offset, howto->name));
+ return TRUE;
+ }
- hs->flags |= hi->flags;
+ /* Can't relax dynamic symbols. */
+ if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
+ return TRUE;
- /* Merge the .got entries. Cannibalize the old symbol's list in
- doing so, since we don't need it anymore. */
+ /* Can't use local-exec relocations in shared libraries. */
+ if (r_type == R_ALPHA_GOTTPREL
+ && (info->link_info->shared && !info->link_info->pie))
+ return TRUE;
- if (hs->got_entries == NULL)
- hs->got_entries = hi->got_entries;
- else
+ if (r_type == R_ALPHA_LITERAL)
{
- struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
-
- gsh = hs->got_entries;
- for (gi = hi->got_entries; gi ; gi = gin)
+ /* Look for nice constant addresses. This includes the not-uncommon
+ special case of 0 for undefweak symbols. */
+ if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak)
+ || (!info->link_info->shared
+ && (symval >= (bfd_vma)-0x8000 || symval < 0x8000)))
{
- gin = gi->next;
- for (gs = gsh; gs ; gs = gs->next)
- if (gi->gotobj == gs->gotobj
- && gi->reloc_type == gs->reloc_type
- && gi->addend == gs->addend)
- {
- gi->use_count += gs->use_count;
- goto got_found;
- }
- gi->next = hs->got_entries;
- hs->got_entries = gi;
- got_found:;
+ disp = 0;
+ insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
+ insn |= (symval & 0xffff);
+ r_type = R_ALPHA_NONE;
+ }
+ else
+ {
+ disp = symval - info->gp;
+ insn = (OP_LDA << 26) | (insn & 0x03ff0000);
+ r_type = R_ALPHA_GPREL16;
}
}
- hi->got_entries = NULL;
-
- /* And similar for the reloc entries. */
-
- if (hs->reloc_entries == NULL)
- hs->reloc_entries = hi->reloc_entries;
else
{
- struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
+ bfd_vma dtp_base, tp_base;
- rsh = hs->reloc_entries;
- for (ri = hi->reloc_entries; ri ; ri = rin)
+ BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
+ dtp_base = alpha_get_dtprel_base (info->link_info);
+ tp_base = alpha_get_tprel_base (info->link_info);
+ disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
+
+ insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
+
+ switch (r_type)
{
- rin = ri->next;
- for (rs = rsh; rs ; rs = rs->next)
- if (ri->rtype == rs->rtype && ri->srel == rs->srel)
- {
- rs->count += ri->count;
- goto found_reloc;
- }
- ri->next = hs->reloc_entries;
- hs->reloc_entries = ri;
- found_reloc:;
+ case R_ALPHA_GOTDTPREL:
+ r_type = R_ALPHA_DTPREL16;
+ break;
+ case R_ALPHA_GOTTPREL:
+ r_type = R_ALPHA_TPREL16;
+ break;
+ default:
+ BFD_ASSERT (0);
+ return FALSE;
}
}
- hi->reloc_entries = NULL;
- return true;
-}
+ if (disp < -0x8000 || disp >= 0x8000)
+ return TRUE;
-/* Is it possible to merge two object file's .got tables? */
+ bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
+ info->changed_contents = TRUE;
-static boolean
-elf64_alpha_can_merge_gots (a, b)
- bfd *a, *b;
+ /* Reduce the use count on this got entry by one, possibly
+ eliminating it. */
+ if (--info->gotent->use_count == 0)
+ {
+ int sz = alpha_got_entry_size (r_type);
+ alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
+ if (!info->h)
+ alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
+ }
+
+ /* Smash the existing GOT relocation for its 16-bit immediate pair. */
+ irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type);
+ info->changed_relocs = TRUE;
+
+ /* ??? Search forward through this basic block looking for insns
+ that use the target register. Stop after an insn modifying the
+ register is seen, or after a branch or call.
+
+ Any such memory load insn may be substituted by a load directly
+ off the GP. This allows the memory load insn to be issued before
+ the calculated GP register would otherwise be ready.
+
+ Any such jsr insn can be replaced by a bsr if it is in range.
+
+ This would mean that we'd have to _add_ relocations, the pain of
+ which gives one pause. */
+
+ return TRUE;
+}
+
+static bfd_vma
+elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval)
{
- int total = alpha_elf_tdata (a)->total_got_size;
- bfd *bsub;
+ /* If the function has the same gp, and we can identify that the
+ function does not use its function pointer, we can eliminate the
+ address load. */
- /* Trivial quick fallout test. */
- if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE)
- return true;
+ /* If the symbol is marked NOPV, we are being told the function never
+ needs its procedure value. */
+ if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV)
+ return symval;
- /* By their nature, local .got entries cannot be merged. */
- if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE)
- return false;
+ /* If the symbol is marked STD_GP, we are being told the function does
+ a normal ldgp in the first two words. */
+ else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD)
+ ;
- /* Failing the common trivial comparison, we must effectively
- perform the merge. Not actually performing the merge means that
- we don't have to store undo information in case we fail. */
- for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
+ /* Otherwise, we may be able to identify a GP load in the first two
+ words, which we can then skip. */
+ else
{
- struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
- Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
- int i, n;
+ Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
+ bfd_vma ofs;
- n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
- for (i = 0; i < n; ++i)
+ /* Load the relocations from the section that the target symbol is in. */
+ if (info->sec == info->tsec)
{
- struct alpha_elf_got_entry *ae, *be;
- struct alpha_elf_link_hash_entry *h;
-
- h = hashes[i];
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+ tsec_relocs = info->relocs;
+ tsec_relend = info->relend;
+ tsec_free = NULL;
+ }
+ else
+ {
+ tsec_relocs = (_bfd_elf_link_read_relocs
+ (info->abfd, info->tsec, (PTR) NULL,
+ (Elf_Internal_Rela *) NULL,
+ info->link_info->keep_memory));
+ if (tsec_relocs == NULL)
+ return 0;
+ tsec_relend = tsec_relocs + info->tsec->reloc_count;
+ tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
+ }
- for (be = h->got_entries; be ; be = be->next)
- {
- if (be->use_count == 0)
- continue;
- if (be->gotobj != b)
- continue;
+ /* Recover the symbol's offset within the section. */
+ ofs = (symval - info->tsec->output_section->vma
+ - info->tsec->output_offset);
- for (ae = h->got_entries; ae ; ae = ae->next)
- if (ae->gotobj == a
- && ae->reloc_type == be->reloc_type
- && ae->addend == be->addend)
- goto global_found;
+ /* Look for a GPDISP reloc. */
+ gpdisp = (elf64_alpha_find_reloc_at_ofs
+ (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
- total += alpha_got_entry_size (be->reloc_type);
- if (total > MAX_GOT_SIZE)
- return false;
- global_found:;
- }
+ if (!gpdisp || gpdisp->r_addend != 4)
+ {
+ if (tsec_free)
+ free (tsec_free);
+ return 0;
}
+ if (tsec_free)
+ free (tsec_free);
}
- return true;
-}
+ /* We've now determined that we can skip an initial gp load. Verify
+ that the call and the target use the same gp. */
+ if (info->link_info->output_bfd->xvec != info->tsec->owner->xvec
+ || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj)
+ return 0;
-/* Actually merge two .got tables. */
+ return symval + 8;
+}
-static void
-elf64_alpha_merge_gots (a, b)
- bfd *a, *b;
+static bfd_boolean
+elf64_alpha_relax_with_lituse (struct alpha_relax_info *info,
+ bfd_vma symval, Elf_Internal_Rela *irel)
{
- int total = alpha_elf_tdata (a)->total_got_size;
- bfd *bsub;
-
- /* Remember local expansion. */
- {
- int e = alpha_elf_tdata (b)->local_got_size;
- total += e;
- alpha_elf_tdata (a)->local_got_size += e;
- }
+ Elf_Internal_Rela *urel, *irelend = info->relend;
+ int flags, count, i;
+ bfd_signed_vma disp;
+ bfd_boolean fits16;
+ bfd_boolean fits32;
+ bfd_boolean lit_reused = FALSE;
+ bfd_boolean all_optimized = TRUE;
+ unsigned int lit_insn;
- for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
+ lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
+ if (lit_insn >> 26 != OP_LDQ)
{
- struct alpha_elf_got_entry **local_got_entries;
- struct alpha_elf_link_hash_entry **hashes;
- Elf_Internal_Shdr *symtab_hdr;
- int i, n;
-
- /* Let the local .got entries know they are part of a new subsegment. */
- local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
- if (local_got_entries)
- {
- n = elf_tdata (bsub)->symtab_hdr.sh_info;
- for (i = 0; i < n; ++i)
- {
- struct alpha_elf_got_entry *ent;
- for (ent = local_got_entries[i]; ent; ent = ent->next)
- ent->gotobj = a;
- }
- }
-
- /* Merge the global .got entries. */
- hashes = alpha_elf_sym_hashes (bsub);
- symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
+ ((*_bfd_error_handler)
+ ("%B: %A+0x%lx: warning: LITERAL relocation against unexpected insn",
+ info->abfd, info->sec,
+ (unsigned long) irel->r_offset));
+ return TRUE;
+ }
- n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
- for (i = 0; i < n; ++i)
- {
- struct alpha_elf_got_entry *ae, *be, **pbe, **start;
- struct alpha_elf_link_hash_entry *h;
+ /* Can't relax dynamic symbols. */
+ if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
+ return TRUE;
- h = hashes[i];
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+ /* Summarize how this particular LITERAL is used. */
+ for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count)
+ {
+ if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE)
+ break;
+ if (urel->r_addend <= 6)
+ flags |= 1 << urel->r_addend;
+ }
- start = &h->got_entries;
- for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next)
- {
- if (be->use_count == 0)
- {
- *pbe = be->next;
- continue;
- }
- if (be->gotobj != b)
- continue;
+ /* A little preparation for the loop... */
+ disp = symval - info->gp;
- for (ae = *start; ae ; ae = ae->next)
- if (ae->gotobj == a
- && ae->reloc_type == be->reloc_type
- && ae->addend == be->addend)
- {
- ae->flags |= be->flags;
- ae->use_count += be->use_count;
- *pbe = be->next;
- goto global_found;
- }
- be->gotobj = a;
- total += alpha_got_entry_size (be->reloc_type);
+ for (urel = irel+1, i = 0; i < count; ++i, ++urel)
+ {
+ unsigned int insn;
+ int insn_disp;
+ bfd_signed_vma xdisp;
- global_found:;
- }
- }
+ insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset);
- alpha_elf_tdata (bsub)->gotobj = a;
- }
- alpha_elf_tdata (a)->total_got_size = total;
+ switch (urel->r_addend)
+ {
+ case LITUSE_ALPHA_ADDR:
+ default:
+ /* This type is really just a placeholder to note that all
+ uses cannot be optimized, but to still allow some. */
+ all_optimized = FALSE;
+ break;
- /* Merge the two in_got chains. */
- {
- bfd *next;
+ case LITUSE_ALPHA_BASE:
+ /* We can always optimize 16-bit displacements. */
- bsub = a;
- while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
- bsub = next;
+ /* Extract the displacement from the instruction, sign-extending
+ it if necessary, then test whether it is within 16 or 32 bits
+ displacement from GP. */
+ insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000;
- alpha_elf_tdata (bsub)->in_got_link_next = b;
- }
-}
+ xdisp = disp + insn_disp;
+ fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000);
+ fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000
+ && xdisp < 0x7fff8000);
-/* Calculate the offsets for the got entries. */
+ if (fits16)
+ {
+ /* Take the op code and dest from this insn, take the base
+ register from the literal insn. Leave the offset alone. */
+ insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
+ urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
+ R_ALPHA_GPREL16);
+ urel->r_addend = irel->r_addend;
+ info->changed_relocs = TRUE;
-static boolean
-elf64_alpha_calc_got_offsets_for_symbol (h, arg)
- struct alpha_elf_link_hash_entry *h;
- PTR arg ATTRIBUTE_UNUSED;
-{
- struct alpha_elf_got_entry *gotent;
+ bfd_put_32 (info->abfd, (bfd_vma) insn,
+ info->contents + urel->r_offset);
+ info->changed_contents = TRUE;
+ }
- if (h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
+ /* If all mem+byte, we can optimize 32-bit mem displacements. */
+ else if (fits32 && !(flags & ~6))
+ {
+ /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
- for (gotent = h->got_entries; gotent; gotent = gotent->next)
- if (gotent->use_count > 0)
- {
- bfd_size_type *plge
- = &alpha_elf_tdata (gotent->gotobj)->got->_raw_size;
+ irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
+ R_ALPHA_GPRELHIGH);
+ lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
+ bfd_put_32 (info->abfd, (bfd_vma) lit_insn,
+ info->contents + irel->r_offset);
+ lit_reused = TRUE;
+ info->changed_contents = TRUE;
- gotent->got_offset = *plge;
- *plge += alpha_got_entry_size (gotent->reloc_type);
- }
+ urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
+ R_ALPHA_GPRELLOW);
+ urel->r_addend = irel->r_addend;
+ info->changed_relocs = TRUE;
+ }
+ else
+ all_optimized = FALSE;
+ break;
- return true;
-}
+ case LITUSE_ALPHA_BYTOFF:
+ /* We can always optimize byte instructions. */
-static void
-elf64_alpha_calc_got_offsets (info)
- struct bfd_link_info *info;
-{
- bfd *i, *got_list = alpha_elf_hash_table(info)->got_list;
+ /* FIXME: sanity check the insn for byte op. Check that the
+ literal dest reg is indeed Rb in the byte insn. */
- /* First, zero out the .got sizes, as we may be recalculating the
- .got after optimizing it. */
- for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
- alpha_elf_tdata(i)->got->_raw_size = 0;
+ insn &= ~ (unsigned) 0x001ff000;
+ insn |= ((symval & 7) << 13) | 0x1000;
- /* Next, fill in the offsets for all the global entries. */
- alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
- elf64_alpha_calc_got_offsets_for_symbol,
- NULL);
+ urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ urel->r_addend = 0;
+ info->changed_relocs = TRUE;
- /* Finally, fill in the offsets for the local entries. */
- for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
- {
- bfd_size_type got_offset = alpha_elf_tdata(i)->got->_raw_size;
- bfd *j;
+ bfd_put_32 (info->abfd, (bfd_vma) insn,
+ info->contents + urel->r_offset);
+ info->changed_contents = TRUE;
+ break;
- for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
- {
- struct alpha_elf_got_entry **local_got_entries, *gotent;
- int k, n;
+ case LITUSE_ALPHA_JSR:
+ case LITUSE_ALPHA_TLSGD:
+ case LITUSE_ALPHA_TLSLDM:
+ case LITUSE_ALPHA_JSRDIRECT:
+ {
+ bfd_vma optdest, org;
+ bfd_signed_vma odisp;
- local_got_entries = alpha_elf_tdata(j)->local_got_entries;
- if (!local_got_entries)
- continue;
+ /* For undefined weak symbols, we're mostly interested in getting
+ rid of the got entry whenever possible, so optimize this to a
+ use of the zero register. */
+ if (info->h && info->h->root.root.type == bfd_link_hash_undefweak)
+ {
+ insn |= 31 << 16;
+ bfd_put_32 (info->abfd, (bfd_vma) insn,
+ info->contents + urel->r_offset);
- for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
- for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
- if (gotent->use_count > 0)
- {
- gotent->got_offset = got_offset;
- got_offset += alpha_got_entry_size (gotent->reloc_type);
- }
- }
+ info->changed_contents = TRUE;
+ break;
+ }
- alpha_elf_tdata(i)->got->_raw_size = got_offset;
- alpha_elf_tdata(i)->got->_cooked_size = got_offset;
- }
-}
+ /* If not zero, place to jump without needing pv. */
+ optdest = elf64_alpha_relax_opt_call (info, symval);
+ org = (info->sec->output_section->vma
+ + info->sec->output_offset
+ + urel->r_offset + 4);
+ odisp = (optdest ? optdest : symval) - org;
-/* Constructs the gots. */
+ if (odisp >= -0x400000 && odisp < 0x400000)
+ {
+ Elf_Internal_Rela *xrel;
-static boolean
-elf64_alpha_size_got_sections (info)
- struct bfd_link_info *info;
-{
- bfd *i, *got_list, *cur_got_obj = NULL;
- int something_changed = 0;
+ /* Preserve branch prediction call stack when possible. */
+ if ((insn & INSN_JSR_MASK) == INSN_JSR)
+ insn = (OP_BSR << 26) | (insn & 0x03e00000);
+ else
+ insn = (OP_BR << 26) | (insn & 0x03e00000);
- got_list = alpha_elf_hash_table (info)->got_list;
+ urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
+ R_ALPHA_BRADDR);
+ urel->r_addend = irel->r_addend;
- /* On the first time through, pretend we have an existing got list
- consisting of all of the input files. */
- if (got_list == NULL)
- {
- for (i = info->input_bfds; i ; i = i->link_next)
- {
- bfd *this_got = alpha_elf_tdata (i)->gotobj;
- if (this_got == NULL)
- continue;
+ if (optdest)
+ urel->r_addend += optdest - symval;
+ else
+ all_optimized = FALSE;
- /* We are assuming no merging has yet ocurred. */
- BFD_ASSERT (this_got == i);
+ bfd_put_32 (info->abfd, (bfd_vma) insn,
+ info->contents + urel->r_offset);
- if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE)
- {
- /* Yikes! A single object file has too many entries. */
- (*_bfd_error_handler)
- (_("%s: .got subsegment exceeds 64K (size %d)"),
- bfd_archive_filename (i),
- alpha_elf_tdata (this_got)->total_got_size);
- return false;
- }
+ /* Kill any HINT reloc that might exist for this insn. */
+ xrel = (elf64_alpha_find_reloc_at_ofs
+ (info->relocs, info->relend, urel->r_offset,
+ R_ALPHA_HINT));
+ if (xrel)
+ xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- if (got_list == NULL)
- got_list = this_got;
- else
- alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
- cur_got_obj = this_got;
- }
+ info->changed_contents = TRUE;
+ info->changed_relocs = TRUE;
+ }
+ else
+ all_optimized = FALSE;
- /* Strange degenerate case of no got references. */
- if (got_list == NULL)
- return true;
+ /* Even if the target is not in range for a direct branch,
+ if we share a GP, we can eliminate the gp reload. */
+ if (optdest)
+ {
+ Elf_Internal_Rela *gpdisp
+ = (elf64_alpha_find_reloc_at_ofs
+ (info->relocs, irelend, urel->r_offset + 4,
+ R_ALPHA_GPDISP));
+ if (gpdisp)
+ {
+ bfd_byte *p_ldah = info->contents + gpdisp->r_offset;
+ bfd_byte *p_lda = p_ldah + gpdisp->r_addend;
+ unsigned int ldah = bfd_get_32 (info->abfd, p_ldah);
+ unsigned int lda = bfd_get_32 (info->abfd, p_lda);
- alpha_elf_hash_table (info)->got_list = got_list;
+ /* Verify that the instruction is "ldah $29,0($26)".
+ Consider a function that ends in a noreturn call,
+ and that the next function begins with an ldgp,
+ and that by accident there is no padding between.
+ In that case the insn would use $27 as the base. */
+ if (ldah == 0x27ba0000 && lda == 0x23bd0000)
+ {
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah);
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda);
- /* Force got offsets to be recalculated. */
- something_changed = 1;
+ gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ info->changed_contents = TRUE;
+ info->changed_relocs = TRUE;
+ }
+ }
+ }
+ }
+ break;
+ }
}
- cur_got_obj = got_list;
- i = alpha_elf_tdata(cur_got_obj)->got_link_next;
- while (i != NULL)
+ /* If all cases were optimized, we can reduce the use count on this
+ got entry by one, possibly eliminating it. */
+ if (all_optimized)
{
- if (elf64_alpha_can_merge_gots (cur_got_obj, i))
+ if (--info->gotent->use_count == 0)
{
- elf64_alpha_merge_gots (cur_got_obj, i);
- i = alpha_elf_tdata(i)->got_link_next;
- alpha_elf_tdata(cur_got_obj)->got_link_next = i;
- something_changed = 1;
+ int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
+ alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
+ if (!info->h)
+ alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
}
- else
+
+ /* If the literal instruction is no longer needed (it may have been
+ reused. We can eliminate it. */
+ /* ??? For now, I don't want to deal with compacting the section,
+ so just nop it out. */
+ if (!lit_reused)
{
- cur_got_obj = i;
- i = alpha_elf_tdata(i)->got_link_next;
- }
- }
+ irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ info->changed_relocs = TRUE;
- /* Once the gots have been merged, fill in the got offsets for
- everything therein. */
- if (1 || something_changed)
- elf64_alpha_calc_got_offsets (info);
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP,
+ info->contents + irel->r_offset);
+ info->changed_contents = TRUE;
+ }
- return true;
+ return TRUE;
+ }
+ else
+ return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL);
}
-/* Called from relax_section to rebuild the PLT in light of
- potential changes in the function's status. */
-
-static boolean
-elf64_alpha_size_plt_section (info)
- struct bfd_link_info *info;
+static bfd_boolean
+elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval,
+ Elf_Internal_Rela *irel, bfd_boolean is_gd)
{
- asection *splt, *spltrel;
- unsigned long entries;
- bfd *dynobj;
-
- dynobj = elf_hash_table(info)->dynobj;
- splt = bfd_get_section_by_name(dynobj, ".plt");
- if (splt == NULL)
- return true;
-
- splt->_raw_size = 0;
+ bfd_byte *pos[5];
+ unsigned int insn, tlsgd_reg;
+ Elf_Internal_Rela *gpdisp, *hint;
+ bfd_boolean dynamic, use_gottprel;
+ unsigned long new_symndx;
- alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
- elf64_alpha_size_plt_section_1, splt);
+ dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info);
- splt->_cooked_size = splt->_raw_size;
+ /* If a TLS symbol is accessed using IE at least once, there is no point
+ to use dynamic model for it. */
+ if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE))
+ ;
- /* Every plt entry requires a JMP_SLOT relocation. */
- spltrel = bfd_get_section_by_name (dynobj, ".rela.plt");
- if (splt->_raw_size)
- entries = (splt->_raw_size - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
- else
- entries = 0;
- spltrel->_raw_size = entries * sizeof (Elf64_External_Rela);
- spltrel->_cooked_size = spltrel->_raw_size;
+ /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
+ then we might as well relax to IE. */
+ else if (info->link_info->shared && !dynamic
+ && (info->link_info->flags & DF_STATIC_TLS))
+ ;
- return true;
-}
+ /* Otherwise we must be building an executable to do anything. */
+ else if (info->link_info->shared)
+ return TRUE;
-static boolean
-elf64_alpha_size_plt_section_1 (h, data)
- struct alpha_elf_link_hash_entry *h;
- PTR data;
-{
- asection *splt = (asection *) data;
- struct alpha_elf_got_entry *gotent;
+ /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
+ the matching LITUSE_TLS relocations. */
+ if (irel + 2 >= info->relend)
+ return TRUE;
+ if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL
+ || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE
+ || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM))
+ return TRUE;
- /* If we didn't need an entry before, we still don't. */
- if (!(h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT))
- return true;
+ /* There must be a GPDISP relocation positioned immediately after the
+ LITUSE relocation. */
+ gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
+ irel[2].r_offset + 4, R_ALPHA_GPDISP);
+ if (!gpdisp)
+ return TRUE;
- /* There must still be a LITERAL got entry for the function. */
- for (gotent = h->got_entries; gotent ; gotent = gotent->next)
- if (gotent->reloc_type == R_ALPHA_LITERAL
- && gotent->use_count > 0)
- break;
+ pos[0] = info->contents + irel[0].r_offset;
+ pos[1] = info->contents + irel[1].r_offset;
+ pos[2] = info->contents + irel[2].r_offset;
+ pos[3] = info->contents + gpdisp->r_offset;
+ pos[4] = pos[3] + gpdisp->r_addend;
- /* If there is, reset the PLT offset. If not, there's no longer
- a need for the PLT entry. */
- if (gotent)
- {
- if (splt->_raw_size == 0)
- splt->_raw_size = PLT_HEADER_SIZE;
- h->root.plt.offset = splt->_raw_size;
- splt->_raw_size += PLT_ENTRY_SIZE;
- }
- else
+ /* Beware of the compiler hoisting part of the sequence out a loop
+ and adjusting the destination register for the TLSGD insn. If this
+ happens, there will be a move into $16 before the JSR insn, so only
+ transformations of the first insn pair should use this register. */
+ tlsgd_reg = bfd_get_32 (info->abfd, pos[0]);
+ tlsgd_reg = (tlsgd_reg >> 21) & 31;
+
+ /* Generally, the positions are not allowed to be out of order, lest the
+ modified insn sequence have different register lifetimes. We can make
+ an exception when pos 1 is adjacent to pos 0. */
+ if (pos[1] + 4 == pos[0])
{
- h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
- h->root.plt.offset = -1;
+ bfd_byte *tmp = pos[0];
+ pos[0] = pos[1];
+ pos[1] = tmp;
}
+ if (pos[1] >= pos[2] || pos[2] >= pos[3])
+ return TRUE;
- return true;
-}
-
-static boolean
-elf64_alpha_always_size_sections (output_bfd, info)
- bfd *output_bfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info;
-{
- bfd *i;
+ /* Reduce the use count on the LITERAL relocation. Do this before we
+ smash the symndx when we adjust the relocations below. */
+ {
+ struct alpha_elf_got_entry *lit_gotent;
+ struct alpha_elf_link_hash_entry *lit_h;
+ unsigned long indx;
- if (info->relocateable)
- return true;
+ BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info);
+ indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info;
+ lit_h = alpha_elf_sym_hashes (info->abfd)[indx];
- /* First, take care of the indirect symbols created by versioning. */
- alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
- elf64_alpha_merge_ind_symbols,
- NULL);
+ while (lit_h->root.root.type == bfd_link_hash_indirect
+ || lit_h->root.root.type == bfd_link_hash_warning)
+ lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link;
- if (!elf64_alpha_size_got_sections (info))
- return false;
+ for (lit_gotent = lit_h->got_entries; lit_gotent ;
+ lit_gotent = lit_gotent->next)
+ if (lit_gotent->gotobj == info->gotobj
+ && lit_gotent->reloc_type == R_ALPHA_LITERAL
+ && lit_gotent->addend == irel[1].r_addend)
+ break;
+ BFD_ASSERT (lit_gotent);
- /* Allocate space for all of the .got subsections. */
- i = alpha_elf_hash_table (info)->got_list;
- for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
- {
- asection *s = alpha_elf_tdata(i)->got;
- if (s->_raw_size > 0)
- {
- s->contents = (bfd_byte *) bfd_zalloc (i, s->_raw_size);
- if (s->contents == NULL)
- return false;
- }
- }
+ if (--lit_gotent->use_count == 0)
+ {
+ int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
+ alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
+ }
+ }
- return true;
-}
+ /* Change
-/* The number of dynamic relocations required by a static relocation. */
+ lda $16,x($gp) !tlsgd!1
+ ldq $27,__tls_get_addr($gp) !literal!1
+ jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
+ ldah $29,0($26) !gpdisp!2
+ lda $29,0($29) !gpdisp!2
+ to
+ ldq $16,x($gp) !gottprel
+ unop
+ call_pal rduniq
+ addq $16,$0,$0
+ unop
+ or the first pair to
+ lda $16,x($gp) !tprel
+ unop
+ or
+ ldah $16,x($gp) !tprelhi
+ lda $16,x($16) !tprello
-static int
-alpha_dynamic_entries_for_reloc (r_type, dynamic, shared)
- int r_type, dynamic, shared;
-{
- switch (r_type)
- {
- /* May appear in GOT entries. */
- case R_ALPHA_TLSGD:
- return (dynamic ? 2 : shared ? 1 : 0);
- case R_ALPHA_TLSLDM:
- return shared;
- case R_ALPHA_LITERAL:
- return dynamic || shared;
- case R_ALPHA_GOTDTPREL:
- case R_ALPHA_GOTTPREL:
- return dynamic;
+ as appropriate. */
- /* May appear in data sections. */
- case R_ALPHA_REFLONG:
- case R_ALPHA_REFQUAD:
- return dynamic || shared;
- case R_ALPHA_SREL64:
- case R_ALPHA_TPREL64:
- return dynamic;
+ use_gottprel = FALSE;
+ new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : STN_UNDEF;
- /* Everything else is illegal. We'll issue an error during
- relocate_section. */
- default:
- return 0;
- }
-}
+ switch (!dynamic && !info->link_info->shared)
+ {
+ case 1:
+ {
+ bfd_vma tp_base;
+ bfd_signed_vma disp;
-/* Work out the sizes of the dynamic relocation entries. */
+ BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
+ tp_base = alpha_get_tprel_base (info->link_info);
+ disp = symval - tp_base;
-static boolean
-elf64_alpha_calc_dynrel_sizes (h, info)
- struct alpha_elf_link_hash_entry *h;
- struct bfd_link_info *info;
-{
- boolean dynamic;
- struct alpha_elf_reloc_entry *relent;
- unsigned long entries;
+ if (disp >= -0x8000 && disp < 0x8000)
+ {
+ insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (31 << 16);
+ bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
- if (h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
+ irel[0].r_offset = pos[0] - info->contents;
+ irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16);
+ irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ break;
+ }
+ else if (disp >= -(bfd_signed_vma) 0x80000000
+ && disp < (bfd_signed_vma) 0x7fff8000
+ && pos[0] + 4 == pos[1])
+ {
+ insn = (OP_LDAH << 26) | (tlsgd_reg << 21) | (31 << 16);
+ bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
+ insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (tlsgd_reg << 16);
+ bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]);
- /* If the symbol was defined as a common symbol in a regular object
- file, and there was no definition in any dynamic object, then the
- linker will have allocated space for the symbol in a common
- section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
- set. This is done for dynamic symbols in
- elf_adjust_dynamic_symbol but this is not done for non-dynamic
- symbols, somehow. */
- if (((h->root.elf_link_hash_flags
- & (ELF_LINK_HASH_DEF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_DEF_DYNAMIC))
- == ELF_LINK_HASH_REF_REGULAR)
- && (h->root.root.type == bfd_link_hash_defined
- || h->root.root.type == bfd_link_hash_defweak)
- && !(h->root.root.u.def.section->owner->flags & DYNAMIC))
- h->root.elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ irel[0].r_offset = pos[0] - info->contents;
+ irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI);
+ irel[1].r_offset = pos[1] - info->contents;
+ irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO);
+ break;
+ }
+ }
+ /* FALLTHRU */
- /* If the symbol is dynamic, we'll need all the relocations in their
- natural form. If this is a shared object, and it has been forced
- local, we'll need the same number of RELATIVE relocations. */
+ default:
+ use_gottprel = TRUE;
- dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
+ insn = (OP_LDQ << 26) | (tlsgd_reg << 21) | (29 << 16);
+ bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
- for (relent = h->reloc_entries; relent; relent = relent->next)
- {
- entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic,
- info->shared);
- if (entries)
- {
- relent->srel->_raw_size +=
- entries * sizeof (Elf64_External_Rela) * relent->count;
- if (relent->reltext)
- info->flags |= DT_TEXTREL;
- }
+ irel[0].r_offset = pos[0] - info->contents;
+ irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL);
+ irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ break;
}
- return true;
-}
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]);
-/* Set the sizes of the dynamic relocation sections. */
+ insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0);
+ bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]);
-static boolean
-elf64_alpha_size_rela_got_section (info)
- struct bfd_link_info *info;
-{
- unsigned long entries;
- bfd *i, *dynobj;
- asection *srel;
+ bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]);
- /* Shared libraries often require RELATIVE relocs, and some relocs
- require attention for the main application as well. */
+ irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+ gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- entries = 0;
- for (i = alpha_elf_hash_table(info)->got_list;
- i ; i = alpha_elf_tdata(i)->got_link_next)
+ hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
+ irel[2].r_offset, R_ALPHA_HINT);
+ if (hint)
+ hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
+
+ info->changed_contents = TRUE;
+ info->changed_relocs = TRUE;
+
+ /* Reduce the use count on the TLSGD/TLSLDM relocation. */
+ if (--info->gotent->use_count == 0)
{
- bfd *j;
+ int sz = alpha_got_entry_size (info->gotent->reloc_type);
+ alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
+ if (!info->h)
+ alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
+ }
- for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
+ /* If we've switched to a GOTTPREL relocation, increment the reference
+ count on that got entry. */
+ if (use_gottprel)
+ {
+ struct alpha_elf_got_entry *tprel_gotent;
+
+ for (tprel_gotent = *info->first_gotent; tprel_gotent ;
+ tprel_gotent = tprel_gotent->next)
+ if (tprel_gotent->gotobj == info->gotobj
+ && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL
+ && tprel_gotent->addend == irel->r_addend)
+ break;
+ if (tprel_gotent)
+ tprel_gotent->use_count++;
+ else
{
- struct alpha_elf_got_entry **local_got_entries, *gotent;
- int k, n;
+ if (info->gotent->use_count == 0)
+ tprel_gotent = info->gotent;
+ else
+ {
+ tprel_gotent = (struct alpha_elf_got_entry *)
+ bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry));
+ if (!tprel_gotent)
+ return FALSE;
- local_got_entries = alpha_elf_tdata(j)->local_got_entries;
- if (!local_got_entries)
- continue;
+ tprel_gotent->next = *info->first_gotent;
+ *info->first_gotent = tprel_gotent;
- for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
- for (gotent = local_got_entries[k];
- gotent ; gotent = gotent->next)
- if (gotent->use_count > 0)
- entries += (alpha_dynamic_entries_for_reloc
- (gotent->reloc_type, 0, info->shared));
+ tprel_gotent->gotobj = info->gotobj;
+ tprel_gotent->addend = irel->r_addend;
+ tprel_gotent->got_offset = -1;
+ tprel_gotent->reloc_done = 0;
+ tprel_gotent->reloc_xlated = 0;
+ }
+
+ tprel_gotent->use_count = 1;
+ tprel_gotent->reloc_type = R_ALPHA_GOTTPREL;
}
}
- dynobj = elf_hash_table(info)->dynobj;
- srel = bfd_get_section_by_name (dynobj, ".rela.got");
- if (!srel)
- {
- BFD_ASSERT (entries == 0);
- return true;
- }
- srel->_raw_size = sizeof (Elf64_External_Rela) * entries;
+ return TRUE;
+}
- /* Now do the non-local symbols. */
- alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
- elf64_alpha_size_rela_got_1, info);
+static bfd_boolean
+elf64_alpha_relax_section (bfd *abfd, asection *sec,
+ struct bfd_link_info *link_info, bfd_boolean *again)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Rela *internal_relocs;
+ Elf_Internal_Rela *irel, *irelend;
+ Elf_Internal_Sym *isymbuf = NULL;
+ struct alpha_elf_got_entry **local_got_entries;
+ struct alpha_relax_info info;
+ struct alpha_elf_link_hash_table * htab;
- srel->_cooked_size = srel->_raw_size;
+ htab = alpha_elf_hash_table (link_info);
+ if (htab == NULL)
+ return FALSE;
- return true;
-}
+ /* There's nothing to change, yet. */
+ *again = FALSE;
-/* Subroutine of elf64_alpha_size_rela_got_section for doing the
- global symbols. */
+ if (link_info->relocatable
+ || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC))
+ != (SEC_CODE | SEC_RELOC | SEC_ALLOC))
+ || sec->reloc_count == 0)
+ return TRUE;
-static boolean
-elf64_alpha_size_rela_got_1 (h, info)
- struct alpha_elf_link_hash_entry *h;
- struct bfd_link_info *info;
-{
- boolean dynamic;
- struct alpha_elf_got_entry *gotent;
- unsigned long entries;
+ BFD_ASSERT (is_alpha_elf (abfd));
- if (h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
+ /* Make sure our GOT and PLT tables are up-to-date. */
+ if (htab->relax_trip != link_info->relax_trip)
+ {
+ htab->relax_trip = link_info->relax_trip;
- /* If the symbol is dynamic, we'll need all the relocations in their
- natural form. If this is a shared object, and it has been forced
- local, we'll need the same number of RELATIVE relocations. */
+ /* This should never fail after the initial round, since the only
+ error is GOT overflow, and relaxation only shrinks the table. */
+ if (!elf64_alpha_size_got_sections (link_info))
+ abort ();
+ if (elf_hash_table (link_info)->dynamic_sections_created)
+ {
+ elf64_alpha_size_plt_section (link_info);
+ elf64_alpha_size_rela_got_section (link_info);
+ }
+ }
- dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
+ symtab_hdr = &elf_symtab_hdr (abfd);
+ local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
- entries = 0;
- for (gotent = h->got_entries; gotent ; gotent = gotent->next)
- if (gotent->use_count > 0)
- entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type,
- dynamic, info->shared);
+ /* Load the relocations for this section. */
+ internal_relocs = (_bfd_elf_link_read_relocs
+ (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
+ link_info->keep_memory));
+ if (internal_relocs == NULL)
+ return FALSE;
- /* If we are using a .plt entry, subtract one, as the first
- reference uses a .rela.plt entry instead. */
- if (h->root.plt.offset != MINUS_ONE)
- entries--;
+ memset(&info, 0, sizeof (info));
+ info.abfd = abfd;
+ info.sec = sec;
+ info.link_info = link_info;
+ info.symtab_hdr = symtab_hdr;
+ info.relocs = internal_relocs;
+ info.relend = irelend = internal_relocs + sec->reloc_count;
- if (entries > 0)
+ /* Find the GP for this object. Do not store the result back via
+ _bfd_set_gp_value, since this could change again before final. */
+ info.gotobj = alpha_elf_tdata (abfd)->gotobj;
+ if (info.gotobj)
{
- bfd *dynobj = elf_hash_table(info)->dynobj;
- asection *srel = bfd_get_section_by_name (dynobj, ".rela.got");
- BFD_ASSERT (srel != NULL);
- srel->_raw_size += sizeof (Elf64_External_Rela) * entries;
+ asection *sgot = alpha_elf_tdata (info.gotobj)->got;
+ info.gp = (sgot->output_section->vma
+ + sgot->output_offset
+ + 0x8000);
}
- return true;
-}
+ /* Get the section contents. */
+ if (elf_section_data (sec)->this_hdr.contents != NULL)
+ info.contents = elf_section_data (sec)->this_hdr.contents;
+ else
+ {
+ if (!bfd_malloc_and_get_section (abfd, sec, &info.contents))
+ goto error_return;
+ }
-/* Set the sizes of the dynamic sections. */
+ for (irel = internal_relocs; irel < irelend; irel++)
+ {
+ bfd_vma symval;
+ struct alpha_elf_got_entry *gotent;
+ unsigned long r_type = ELF64_R_TYPE (irel->r_info);
+ unsigned long r_symndx = ELF64_R_SYM (irel->r_info);
-static boolean
-elf64_alpha_size_dynamic_sections (output_bfd, info)
- bfd *output_bfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info;
-{
- bfd *dynobj;
- asection *s;
- boolean relplt;
+ /* Early exit for unhandled or unrelaxable relocations. */
+ switch (r_type)
+ {
+ case R_ALPHA_LITERAL:
+ case R_ALPHA_GPRELHIGH:
+ case R_ALPHA_GPRELLOW:
+ case R_ALPHA_GOTDTPREL:
+ case R_ALPHA_GOTTPREL:
+ case R_ALPHA_TLSGD:
+ break;
- dynobj = elf_hash_table(info)->dynobj;
- BFD_ASSERT(dynobj != NULL);
+ case R_ALPHA_TLSLDM:
+ /* The symbol for a TLSLDM reloc is ignored. Collapse the
+ reloc to the STN_UNDEF (0) symbol so that they all match. */
+ r_symndx = STN_UNDEF;
+ break;
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- /* Set the contents of the .interp section to the interpreter. */
- if (!info->shared)
+ default:
+ continue;
+ }
+
+ /* Get the value of the symbol referred to by the reloc. */
+ if (r_symndx < symtab_hdr->sh_info)
{
- s = bfd_get_section_by_name (dynobj, ".interp");
- BFD_ASSERT (s != NULL);
- s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
- s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+ /* A local symbol. */
+ Elf_Internal_Sym *isym;
+
+ /* Read this BFD's local symbols. */
+ if (isymbuf == NULL)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ goto error_return;
+ }
+
+ isym = isymbuf + r_symndx;
+
+ /* Given the symbol for a TLSLDM reloc is ignored, this also
+ means forcing the symbol value to the tp base. */
+ if (r_type == R_ALPHA_TLSLDM)
+ {
+ info.tsec = bfd_abs_section_ptr;
+ symval = alpha_get_tprel_base (info.link_info);
+ }
+ else
+ {
+ symval = isym->st_value;
+ if (isym->st_shndx == SHN_UNDEF)
+ continue;
+ else if (isym->st_shndx == SHN_ABS)
+ info.tsec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ info.tsec = bfd_com_section_ptr;
+ else
+ info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ }
+
+ info.h = NULL;
+ info.other = isym->st_other;
+ if (local_got_entries)
+ info.first_gotent = &local_got_entries[r_symndx];
+ else
+ {
+ info.first_gotent = &info.gotent;
+ info.gotent = NULL;
+ }
}
+ else
+ {
+ unsigned long indx;
+ struct alpha_elf_link_hash_entry *h;
- /* Now that we've seen all of the input files, we can decide which
- symbols need dynamic relocation entries and which don't. We've
- collected information in check_relocs that we can now apply to
- size the dynamic relocation sections. */
- alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
- elf64_alpha_calc_dynrel_sizes, info);
+ indx = r_symndx - symtab_hdr->sh_info;
+ h = alpha_elf_sym_hashes (abfd)[indx];
+ BFD_ASSERT (h != NULL);
- elf64_alpha_size_rela_got_section (info);
- }
- /* else we're not dynamic and by definition we don't need such things. */
+ while (h->root.root.type == bfd_link_hash_indirect
+ || h->root.root.type == bfd_link_hash_warning)
+ h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
- /* The check_relocs and adjust_dynamic_symbol entry points have
- determined the sizes of the various dynamic sections. Allocate
- memory for them. */
- relplt = false;
- for (s = dynobj->sections; s != NULL; s = s->next)
- {
- const char *name;
- boolean strip;
+ /* If the symbol is undefined, we can't do anything with it. */
+ if (h->root.root.type == bfd_link_hash_undefined)
+ continue;
- if (!(s->flags & SEC_LINKER_CREATED))
- continue;
+ /* If the symbol isn't defined in the current module,
+ again we can't do anything. */
+ if (h->root.root.type == bfd_link_hash_undefweak)
+ {
+ info.tsec = bfd_abs_section_ptr;
+ symval = 0;
+ }
+ else if (!h->root.def_regular)
+ {
+ /* Except for TLSGD relocs, which can sometimes be
+ relaxed to GOTTPREL relocs. */
+ if (r_type != R_ALPHA_TLSGD)
+ continue;
+ info.tsec = bfd_abs_section_ptr;
+ symval = 0;
+ }
+ else
+ {
+ info.tsec = h->root.root.u.def.section;
+ symval = h->root.root.u.def.value;
+ }
- /* It's OK to base decisions on the section name, because none
- of the dynobj section names depend upon the input files. */
- name = bfd_get_section_name (dynobj, s);
+ info.h = h;
+ info.other = h->root.other;
+ info.first_gotent = &h->got_entries;
+ }
- /* If we don't need this section, strip it from the output file.
- This is to handle .rela.bss and .rela.plt. We must create it
- in create_dynamic_sections, because it must be created before
- the linker maps input sections to output sections. The
- linker does that before adjust_dynamic_symbol is called, and
- it is that function which decides whether anything needs to
- go into these sections. */
+ /* Search for the got entry to be used by this relocation. */
+ for (gotent = *info.first_gotent; gotent ; gotent = gotent->next)
+ if (gotent->gotobj == info.gotobj
+ && gotent->reloc_type == r_type
+ && gotent->addend == irel->r_addend)
+ break;
+ info.gotent = gotent;
- strip = false;
+ symval += info.tsec->output_section->vma + info.tsec->output_offset;
+ symval += irel->r_addend;
- if (strncmp (name, ".rela", 5) == 0)
+ switch (r_type)
{
- strip = (s->_raw_size == 0);
+ case R_ALPHA_LITERAL:
+ BFD_ASSERT(info.gotent != NULL);
- if (!strip)
+ /* If there exist LITUSE relocations immediately following, this
+ opens up all sorts of interesting optimizations, because we
+ now know every location that this address load is used. */
+ if (irel+1 < irelend
+ && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
{
- if (strcmp(name, ".rela.plt") == 0)
- relplt = true;
-
- /* We use the reloc_count field as a counter if we need
- to copy relocs into the output file. */
- s->reloc_count = 0;
+ if (!elf64_alpha_relax_with_lituse (&info, symval, irel))
+ goto error_return;
+ }
+ else
+ {
+ if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
+ goto error_return;
}
+ break;
+
+ case R_ALPHA_GOTDTPREL:
+ case R_ALPHA_GOTTPREL:
+ BFD_ASSERT(info.gotent != NULL);
+ if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
+ goto error_return;
+ break;
+
+ case R_ALPHA_TLSGD:
+ case R_ALPHA_TLSLDM:
+ BFD_ASSERT(info.gotent != NULL);
+ if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel,
+ r_type == R_ALPHA_TLSGD))
+ goto error_return;
+ break;
}
- else if (strcmp (name, ".plt") != 0)
+ }
+
+ if (isymbuf != NULL
+ && symtab_hdr->contents != (unsigned char *) isymbuf)
+ {
+ if (!link_info->keep_memory)
+ free (isymbuf);
+ else
{
- /* It's not one of our dynamic sections, so don't allocate space. */
- continue;
+ /* Cache the symbols for elf_link_input_bfd. */
+ symtab_hdr->contents = (unsigned char *) isymbuf;
}
+ }
- if (strip)
- _bfd_strip_section_from_output (info, s);
+ if (info.contents != NULL
+ && elf_section_data (sec)->this_hdr.contents != info.contents)
+ {
+ if (!info.changed_contents && !link_info->keep_memory)
+ free (info.contents);
else
{
- /* Allocate memory for the section contents. */
- s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
- if (s->contents == NULL && s->_raw_size != 0)
- return false;
+ /* Cache the section contents for elf_link_input_bfd. */
+ elf_section_data (sec)->this_hdr.contents = info.contents;
}
}
- if (elf_hash_table (info)->dynamic_sections_created)
+ if (elf_section_data (sec)->relocs != internal_relocs)
{
- /* Add some entries to the .dynamic section. We fill in the
- values later, in elf64_alpha_finish_dynamic_sections, but we
- must add the entries now so that we get the correct size for
- the .dynamic section. The DT_DEBUG entry is filled in by the
- dynamic linker and used by the debugger. */
-#define add_dynamic_entry(TAG, VAL) \
- bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
+ if (!info.changed_relocs)
+ free (internal_relocs);
+ else
+ elf_section_data (sec)->relocs = internal_relocs;
+ }
- if (!info->shared)
- {
- if (!add_dynamic_entry (DT_DEBUG, 0))
- return false;
- }
+ *again = info.changed_contents || info.changed_relocs;
- if (relplt)
- {
- if (!add_dynamic_entry (DT_PLTGOT, 0)
- || !add_dynamic_entry (DT_PLTRELSZ, 0)
- || !add_dynamic_entry (DT_PLTREL, DT_RELA)
- || !add_dynamic_entry (DT_JMPREL, 0))
- return false;
- }
+ return TRUE;
- if (!add_dynamic_entry (DT_RELA, 0)
- || !add_dynamic_entry (DT_RELASZ, 0)
- || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
- return false;
+ error_return:
+ if (isymbuf != NULL
+ && symtab_hdr->contents != (unsigned char *) isymbuf)
+ free (isymbuf);
+ if (info.contents != NULL
+ && elf_section_data (sec)->this_hdr.contents != info.contents)
+ free (info.contents);
+ if (internal_relocs != NULL
+ && elf_section_data (sec)->relocs != internal_relocs)
+ free (internal_relocs);
+ return FALSE;
+}
+\f
+/* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
+ into the next available slot in SREL. */
- if (info->flags & DF_TEXTREL)
- {
- if (!add_dynamic_entry (DT_TEXTREL, 0))
- return false;
- }
- }
-#undef add_dynamic_entry
+static void
+elf64_alpha_emit_dynrel (bfd *abfd, struct bfd_link_info *info,
+ asection *sec, asection *srel, bfd_vma offset,
+ long dynindx, long rtype, bfd_vma addend)
+{
+ Elf_Internal_Rela outrel;
+ bfd_byte *loc;
+
+ BFD_ASSERT (srel != NULL);
+
+ outrel.r_info = ELF64_R_INFO (dynindx, rtype);
+ outrel.r_addend = addend;
+
+ offset = _bfd_elf_section_offset (abfd, info, sec, offset);
+ if ((offset | 1) != (bfd_vma) -1)
+ outrel.r_offset = sec->output_section->vma + sec->output_offset + offset;
+ else
+ memset (&outrel, 0, sizeof (outrel));
- return true;
+ loc = srel->contents;
+ loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
+ bfd_elf64_swap_reloca_out (abfd, &outrel, loc);
+ BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count <= srel->size);
}
/* Relocate an Alpha ELF section for a relocatable link.
symbol, in which case we have to adjust according to where the section
symbol winds up in the output section. */
-static boolean
-elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, input_section,
- contents, relocs, local_syms, local_sections)
- bfd *output_bfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- bfd *input_bfd;
- asection *input_section;
- bfd_byte *contents ATTRIBUTE_UNUSED;
- Elf_Internal_Rela *relocs;
- Elf_Internal_Sym *local_syms;
- asection **local_sections;
+static bfd_boolean
+elf64_alpha_relocate_section_r (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ bfd *input_bfd, asection *input_section,
+ bfd_byte *contents ATTRIBUTE_UNUSED,
+ Elf_Internal_Rela *relocs,
+ Elf_Internal_Sym *local_syms,
+ asection **local_sections)
{
unsigned long symtab_hdr_sh_info;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
- boolean ret_val = true;
+ struct elf_link_hash_entry **sym_hashes;
+ bfd_boolean ret_val = TRUE;
- symtab_hdr_sh_info = elf_tdata (input_bfd)->symtab_hdr.sh_info;
+ symtab_hdr_sh_info = elf_symtab_hdr (input_bfd).sh_info;
+ sym_hashes = elf_sym_hashes (input_bfd);
relend = relocs + input_section->reloc_count;
for (rel = relocs; rel < relend; rel++)
asection *sec;
unsigned long r_type;
- r_type = ELF64_R_TYPE(rel->r_info);
+ r_type = ELF64_R_TYPE (rel->r_info);
if (r_type >= R_ALPHA_max)
{
(*_bfd_error_handler)
- (_("%s: unknown relocation type %d"),
- bfd_archive_filename (input_bfd), (int)r_type);
+ (_("%B: unknown relocation type %d"),
+ input_bfd, (int) r_type);
bfd_set_error (bfd_error_bad_value);
- ret_val = false;
+ ret_val = FALSE;
continue;
}
- r_symndx = ELF64_R_SYM(rel->r_info);
-
/* The symbol associated with GPDISP and LITUSE is
immaterial. Only the addend is significant. */
if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE)
continue;
+ r_symndx = ELF64_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr_sh_info)
{
sym = local_syms + r_symndx;
- if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
- {
- sec = local_sections[r_symndx];
- rel->r_addend += sec->output_offset + sym->st_value;
- }
+ sec = local_sections[r_symndx];
+ }
+ else
+ {
+ struct elf_link_hash_entry *h;
+
+ h = sym_hashes[r_symndx - symtab_hdr_sh_info];
+
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ continue;
+
+ sym = NULL;
+ sec = h->root.u.def.section;
}
+
+ if (sec != NULL && elf_discarded_section (sec))
+ RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+ rel, relend,
+ elf64_alpha_howto_table + r_type,
+ contents);
+
+ if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ rel->r_addend += sec->output_offset;
}
return ret_val;
/* Relocate an Alpha ELF section. */
-static boolean
-elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section,
- contents, relocs, local_syms, local_sections)
- bfd *output_bfd;
- struct bfd_link_info *info;
- bfd *input_bfd;
- asection *input_section;
- bfd_byte *contents;
- Elf_Internal_Rela *relocs;
- Elf_Internal_Sym *local_syms;
- asection **local_sections;
+static bfd_boolean
+elf64_alpha_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
+ bfd *input_bfd, asection *input_section,
+ bfd_byte *contents, Elf_Internal_Rela *relocs,
+ Elf_Internal_Sym *local_syms,
+ asection **local_sections)
{
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
- struct elf_link_tls_segment *tls_segment;
asection *sgot, *srel, *srelgot;
bfd *dynobj, *gotobj;
bfd_vma gp, tp_base, dtp_base;
struct alpha_elf_got_entry **local_got_entries;
- boolean ret_val;
- const char *section_name;
+ bfd_boolean ret_val;
+ BFD_ASSERT (is_alpha_elf (input_bfd));
+
/* Handle relocatable links with a smaller loop. */
- if (info->relocateable)
+ if (info->relocatable)
return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd,
input_section, contents, relocs,
local_syms, local_sections);
/* This is a final link. */
- ret_val = true;
+ ret_val = TRUE;
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ symtab_hdr = &elf_symtab_hdr (input_bfd);
dynobj = elf_hash_table (info)->dynobj;
if (dynobj)
else
srelgot = NULL;
- section_name = (bfd_elf_string_from_elf_section
- (input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
- elf_section_data(input_section)->rel_hdr.sh_name));
- BFD_ASSERT(section_name != NULL);
- srel = bfd_get_section_by_name (dynobj, section_name);
+ if (input_section->flags & SEC_ALLOC)
+ {
+ const char *section_name;
+ section_name = (bfd_elf_string_from_elf_section
+ (input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
+ _bfd_elf_single_rel_hdr (input_section)->sh_name));
+ BFD_ASSERT(section_name != NULL);
+ srel = bfd_get_section_by_name (dynobj, section_name);
+ }
+ else
+ srel = NULL;
/* Find the gp value for this input bfd. */
gotobj = alpha_elf_tdata (input_bfd)->gotobj;
local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries;
- tls_segment = elf_hash_table (info)->tls_segment;
- if (tls_segment)
+ if (elf_hash_table (info)->tls_sec != NULL)
{
- dtp_base = alpha_get_dtprel_base (tls_segment);
- tp_base = alpha_get_tprel_base (tls_segment);
+ dtp_base = alpha_get_dtprel_base (info);
+ tp_base = alpha_get_tprel_base (info);
}
else
dtp_base = tp_base = 0;
asection *sec = NULL;
bfd_vma value;
bfd_vma addend;
- boolean dynamic_symbol_p;
- boolean undef_weak_ref = false;
+ bfd_boolean dynamic_symbol_p;
+ bfd_boolean unresolved_reloc = FALSE;
+ bfd_boolean undef_weak_ref = FALSE;
unsigned long r_type;
r_type = ELF64_R_TYPE(rel->r_info);
if (r_type >= R_ALPHA_max)
{
(*_bfd_error_handler)
- (_("%s: unknown relocation type %d"),
- bfd_archive_filename (input_bfd), (int)r_type);
+ (_("%B: unknown relocation type %d"),
+ input_bfd, (int) r_type);
bfd_set_error (bfd_error_bad_value);
- ret_val = false;
+ ret_val = FALSE;
continue;
}
howto = elf64_alpha_howto_table + r_type;
r_symndx = ELF64_R_SYM(rel->r_info);
+ /* The symbol for a TLSLDM reloc is ignored. Collapse the
+ reloc to the STN_UNDEF (0) symbol so that they all match. */
+ if (r_type == R_ALPHA_TLSLDM)
+ r_symndx = STN_UNDEF;
+
if (r_symndx < symtab_hdr->sh_info)
{
+ asection *msec;
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
- value = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
+ msec = sec;
+ value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel);
+
+ /* If this is a tp-relative relocation against sym STN_UNDEF (0),
+ this is hackery from relax_section. Force the value to
+ be the tls module base. */
+ if (r_symndx == STN_UNDEF
+ && (r_type == R_ALPHA_TLSLDM
+ || r_type == R_ALPHA_GOTTPREL
+ || r_type == R_ALPHA_TPREL64
+ || r_type == R_ALPHA_TPRELHI
+ || r_type == R_ALPHA_TPRELLO
+ || r_type == R_ALPHA_TPREL16))
+ value = dtp_base;
if (local_got_entries)
gotent = local_got_entries[r_symndx];
unless it has been done already. */
if ((sec->flags & SEC_MERGE)
&& ELF_ST_TYPE (sym->st_info) == STT_SECTION
- && (elf_section_data (sec)->sec_info_type
- == ELF_INFO_TYPE_MERGE)
+ && sec->sec_info_type == ELF_INFO_TYPE_MERGE
&& gotent
&& !gotent->reloc_xlated)
{
struct alpha_elf_got_entry *ent;
- asection *msec;
for (ent = gotent; ent; ent = ent->next)
{
_bfd_merged_section_offset (output_bfd, &msec,
elf_section_data (sec)->
sec_info,
- sym->st_value + ent->addend,
- (bfd_vma) 0);
+ sym->st_value + ent->addend);
ent->addend -= sym->st_value;
ent->addend += msec->output_section->vma
+ msec->output_offset
}
}
- dynamic_symbol_p = false;
+ dynamic_symbol_p = FALSE;
}
else
{
- h = alpha_elf_sym_hashes (input_bfd)[r_symndx - symtab_hdr->sh_info];
+ bfd_boolean warned;
+ struct elf_link_hash_entry *hh;
+ struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+ RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+ r_symndx, symtab_hdr, sym_hashes,
+ hh, sec, value,
+ unresolved_reloc, warned);
- value = 0;
- if (h->root.root.type == bfd_link_hash_defined
- || h->root.root.type == bfd_link_hash_defweak)
- {
- sec = h->root.root.u.def.section;
-
- /* Detect the cases that sym_sec->output_section is
- expected to be NULL -- all cases in which the symbol
- is defined in another shared module. This includes
- PLT relocs for which we've created a PLT entry and
- other relocs for which we're prepared to create
- dynamic relocations. */
- /* ??? Just accept it NULL and continue. */
-
- if (sec->output_section != NULL)
- value = (h->root.root.u.def.value
- + sec->output_section->vma
- + sec->output_offset);
- }
- else if (h->root.root.type == bfd_link_hash_undefweak)
- undef_weak_ref = true;
- else if (info->shared
- && (!info->symbolic || info->allow_shlib_undefined)
- && !info->no_undefined
- && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
- ;
- else
- {
- if (!((*info->callbacks->undefined_symbol)
- (info, h->root.root.root.string, input_bfd,
- input_section, rel->r_offset,
- (!info->shared || info->no_undefined
- || ELF_ST_VISIBILITY (h->root.other)))))
- return false;
- ret_val = false;
- continue;
- }
+ if (warned)
+ continue;
+ if (value == 0
+ && ! unresolved_reloc
+ && hh->root.type == bfd_link_hash_undefweak)
+ undef_weak_ref = TRUE;
+
+ h = (struct alpha_elf_link_hash_entry *) hh;
dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info);
gotent = h->got_entries;
}
+ if (sec != NULL && elf_discarded_section (sec))
+ RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+ rel, relend, howto, contents);
+
addend = rel->r_addend;
value += addend;
/* If the symbol has been forced local, output a
RELATIVE reloc, otherwise it will be handled in
finish_dynamic_symbol. */
- if (info->shared && !dynamic_symbol_p)
- {
- Elf_Internal_Rela outrel;
- bfd_byte *loc;
-
- BFD_ASSERT(srelgot != NULL);
-
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- outrel.r_info = ELF64_R_INFO (0, R_ALPHA_RELATIVE);
- outrel.r_addend = value;
-
- loc = srelgot->contents;
- loc += srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
- BFD_ASSERT (sizeof (Elf64_External_Rela)
- * srelgot->reloc_count
- <= srelgot->_cooked_size);
- }
+ if (info->shared && !dynamic_symbol_p && !undef_weak_ref)
+ elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
+ gotent->got_offset, 0,
+ R_ALPHA_RELATIVE, value);
}
value = (sgot->output_section->vma
value -= gp;
goto default_reloc;
- case R_ALPHA_GPREL16:
case R_ALPHA_GPREL32:
+ case R_ALPHA_GPREL16:
case R_ALPHA_GPRELLOW:
if (dynamic_symbol_p)
{
(*_bfd_error_handler)
- (_("%s: gp-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
+ (_("%B: gp-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
}
BFD_ASSERT(gp != 0);
value -= gp;
if (dynamic_symbol_p)
{
(*_bfd_error_handler)
- (_("%s: gp-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
+ (_("%B: gp-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
}
BFD_ASSERT(gp != 0);
value -= gp;
if (dynamic_symbol_p)
{
(*_bfd_error_handler)
- (_("%s: pc-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
+ (_("%B: pc-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
}
/* The regular PC-relative stuff measures from the start of
the instruction rather than the end. */
&& gotobj != alpha_elf_tdata (sec->owner)->gotobj)
{
(*_bfd_error_handler)
- (_("%s: change in gp: BRSGP %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
+ (_("%B: change in gp: BRSGP %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
}
/* The symbol should be marked either NOPV or STD_GPLOAD. */
name = bfd_section_name (input_bfd, sec);
}
(*_bfd_error_handler)
- (_("%s: !samegp reloc against symbol without .prologue: %s"),
- bfd_archive_filename (input_bfd), name);
- ret_val = false;
+ (_("%B: !samegp reloc against symbol without .prologue: %s"),
+ input_bfd, name);
+ ret_val = FALSE;
break;
}
case R_ALPHA_DTPREL64:
case R_ALPHA_TPREL64:
{
- Elf_Internal_Rela outrel;
- bfd_byte *loc;
+ long dynindx, dyntype = r_type;
+ bfd_vma dynaddend;
/* Careful here to remember RELATIVE relocations for global
variables for symbolic shared objects. */
if (dynamic_symbol_p)
{
BFD_ASSERT(h->root.dynindx != -1);
- outrel.r_info = ELF64_R_INFO (h->root.dynindx, r_type);
- outrel.r_addend = addend;
+ dynindx = h->root.dynindx;
+ dynaddend = addend;
addend = 0, value = 0;
}
else if (r_type == R_ALPHA_DTPREL64)
{
- BFD_ASSERT(tls_segment != NULL);
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
value -= dtp_base;
goto default_reloc;
}
else if (r_type == R_ALPHA_TPREL64)
{
- BFD_ASSERT(tls_segment != NULL);
- value -= dtp_base;
- goto default_reloc;
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
+ if (!info->shared || info->pie)
+ {
+ value -= tp_base;
+ goto default_reloc;
+ }
+ dynindx = 0;
+ dynaddend = value - dtp_base;
}
else if (info->shared
- && r_symndx != 0
- && (input_section->flags & SEC_ALLOC))
+ && r_symndx != STN_UNDEF
+ && (input_section->flags & SEC_ALLOC)
+ && !undef_weak_ref
+ && !(unresolved_reloc
+ && (_bfd_elf_section_offset (output_bfd, info,
+ input_section,
+ rel->r_offset)
+ == (bfd_vma) -1)))
{
if (r_type == R_ALPHA_REFLONG)
{
(*_bfd_error_handler)
- (_("%s: unhandled dynamic relocation against %s"),
- bfd_archive_filename (input_bfd),
+ (_("%B: unhandled dynamic relocation against %s"),
+ input_bfd,
h->root.root.root.string);
- ret_val = false;
+ ret_val = FALSE;
}
- outrel.r_info = ELF64_R_INFO (0, R_ALPHA_RELATIVE);
- outrel.r_addend = value;
+ dynindx = 0;
+ dyntype = R_ALPHA_RELATIVE;
+ dynaddend = value;
}
else
goto default_reloc;
- BFD_ASSERT(srel != NULL);
-
- outrel.r_offset =
- _bfd_elf_section_offset (output_bfd, info, input_section,
- rel->r_offset);
- if ((outrel.r_offset | 1) != (bfd_vma) -1)
- outrel.r_offset += (input_section->output_section->vma
- + input_section->output_offset);
- else
- memset (&outrel, 0, sizeof outrel);
-
- loc = srel->contents;
- loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
- BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count
- <= srel->_cooked_size);
+ if (input_section->flags & SEC_ALLOC)
+ elf64_alpha_emit_dynrel (output_bfd, info, input_section,
+ srel, rel->r_offset, dynindx,
+ dyntype, dynaddend);
}
goto default_reloc;
if (dynamic_symbol_p)
{
(*_bfd_error_handler)
- (_("%s: pc-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
+ (_("%B: pc-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
+ }
+ else if ((info->shared || info->pie) && undef_weak_ref)
+ {
+ (*_bfd_error_handler)
+ (_("%B: pc-relative relocation against undefined weak symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
}
+
/* ??? .eh_frame references to discarded sections will be smashed
to relocations against SHN_UNDEF. The .eh_frame format allows
NULL to be encoded as 0 in any format, so this works here. */
- if (r_symndx == 0)
+ if (r_symndx == STN_UNDEF
+ || (unresolved_reloc
+ && _bfd_elf_section_offset (output_bfd, info,
+ input_section,
+ rel->r_offset) == (bfd_vma) -1))
howto = (elf64_alpha_howto_table
+ (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG));
goto default_reloc;
DTPMOD64 reloc, otherwise it will be handled in
finish_dynamic_symbol. */
if (info->shared && !dynamic_symbol_p)
- {
- Elf_Internal_Rela outrel;
- bfd_byte *loc;
-
- BFD_ASSERT(srelgot != NULL);
-
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- /* ??? Proper dynindx here. */
- outrel.r_info = ELF64_R_INFO (0, R_ALPHA_DTPMOD64);
- outrel.r_addend = 0;
-
- loc = srelgot->contents;
- loc += srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
- BFD_ASSERT (sizeof (Elf64_External_Rela)
- * srelgot->reloc_count
- <= srelgot->_cooked_size);
- }
+ elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
+ gotent->got_offset, 0,
+ R_ALPHA_DTPMOD64, 0);
if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM)
value = 0;
else
{
- BFD_ASSERT(tls_segment != NULL);
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
value -= dtp_base;
}
bfd_put_64 (output_bfd, value,
if (dynamic_symbol_p)
{
(*_bfd_error_handler)
- (_("%s: dtp-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
+ (_("%B: dtp-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
}
- BFD_ASSERT(tls_segment != NULL);
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
value -= dtp_base;
if (r_type == R_ALPHA_DTPRELHI)
value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
case R_ALPHA_TPRELHI:
case R_ALPHA_TPRELLO:
case R_ALPHA_TPREL16:
- if (info->shared)
+ if (info->shared && !info->pie)
{
(*_bfd_error_handler)
- (_("%s: TLS local exec code cannot be linked into shared objects"),
- bfd_archive_filename (input_bfd));
- ret_val = false;
+ (_("%B: TLS local exec code cannot be linked into shared objects"),
+ input_bfd);
+ ret_val = FALSE;
}
else if (dynamic_symbol_p)
{
(*_bfd_error_handler)
- (_("%s: tp-relative relocation against dynamic symbol %s"),
- bfd_archive_filename (input_bfd), h->root.root.root.string);
- ret_val = false;
+ (_("%B: tp-relative relocation against dynamic symbol %s"),
+ input_bfd, h->root.root.root.string);
+ ret_val = FALSE;
}
- BFD_ASSERT(tls_segment != NULL);
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
value -= tp_base;
if (r_type == R_ALPHA_TPRELHI)
value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
value = 0;
else
{
- BFD_ASSERT(tls_segment != NULL);
- value -= (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
+ BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
+ if (r_type == R_ALPHA_GOTDTPREL)
+ value -= dtp_base;
+ else if (!info->shared)
+ value -= tp_base;
+ else
+ {
+ elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
+ gotent->got_offset, 0,
+ R_ALPHA_TPREL64,
+ value - dtp_base);
+ value = 0;
+ }
}
bfd_put_64 (output_bfd, value,
sgot->contents + gotent->got_offset);
break;
if (h != NULL)
- name = h->root.root.root.string;
+ name = NULL;
else
{
name = (bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link, sym->st_name));
if (name == NULL)
- return false;
+ return FALSE;
if (*name == '\0')
name = bfd_section_name (input_bfd, sec);
}
if (! ((*info->callbacks->reloc_overflow)
- (info, name, howto->name, (bfd_vma) 0,
- input_bfd, input_section, rel->r_offset)))
- ret_val = false;
+ (info, (h ? &h->root.root : NULL), name, howto->name,
+ (bfd_vma) 0, input_bfd, input_section,
+ rel->r_offset)))
+ ret_val = FALSE;
}
break;
/* Finish up dynamic symbol handling. We set the contents of various
dynamic sections here. */
-static boolean
-elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym)
- bfd *output_bfd;
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
- Elf_Internal_Sym *sym;
+static bfd_boolean
+elf64_alpha_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
{
+ struct alpha_elf_link_hash_entry *ah = (struct alpha_elf_link_hash_entry *)h;
bfd *dynobj = elf_hash_table(info)->dynobj;
- if (h->plt.offset != MINUS_ONE)
+ if (h->needs_plt)
{
/* Fill in the .plt entry for this symbol. */
asection *splt, *sgot, *srel;
BFD_ASSERT (h->dynindx != -1);
- /* The first .got entry will be updated by the .plt with the
- address of the target function. */
- gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
- BFD_ASSERT (gotent && gotent->addend == 0);
-
splt = bfd_get_section_by_name (dynobj, ".plt");
BFD_ASSERT (splt != NULL);
srel = bfd_get_section_by_name (dynobj, ".rela.plt");
BFD_ASSERT (srel != NULL);
- sgot = alpha_elf_tdata (gotent->gotobj)->got;
- BFD_ASSERT (sgot != NULL);
-
- got_addr = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- plt_addr = (splt->output_section->vma
- + splt->output_offset
- + h->plt.offset);
-
- plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
- /* Fill in the entry in the procedure linkage table. */
- {
- bfd_vma insn1, insn2, insn3;
-
- insn1 = PLT_ENTRY_WORD1 | ((-(h->plt.offset + 4) >> 2) & 0x1fffff);
- insn2 = PLT_ENTRY_WORD2;
- insn3 = PLT_ENTRY_WORD3;
-
- bfd_put_32 (output_bfd, insn1, splt->contents + h->plt.offset);
- bfd_put_32 (output_bfd, insn2, splt->contents + h->plt.offset + 4);
- bfd_put_32 (output_bfd, insn3, splt->contents + h->plt.offset + 8);
- }
+ for (gotent = ah->got_entries; gotent ; gotent = gotent->next)
+ if (gotent->reloc_type == R_ALPHA_LITERAL
+ && gotent->use_count > 0)
+ {
+ unsigned int insn;
+ int disp;
- /* Fill in the entry in the .rela.plt section. */
- outrel.r_offset = got_addr;
- outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
- outrel.r_addend = 0;
+ sgot = alpha_elf_tdata (gotent->gotobj)->got;
+ BFD_ASSERT (sgot != NULL);
- loc = srel->contents + plt_index * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
+ BFD_ASSERT (gotent->got_offset != -1);
+ BFD_ASSERT (gotent->plt_offset != -1);
- if (!(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
- {
- /* Mark the symbol as undefined, rather than as defined in the
- .plt section. Leave the value alone. */
- sym->st_shndx = SHN_UNDEF;
- }
+ got_addr = (sgot->output_section->vma
+ + sgot->output_offset
+ + gotent->got_offset);
+ plt_addr = (splt->output_section->vma
+ + splt->output_offset
+ + gotent->plt_offset);
- /* Fill in the entries in the .got. */
- bfd_put_64 (output_bfd, plt_addr, sgot->contents + gotent->got_offset);
+ plt_index = (gotent->plt_offset-PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
- /* Subsequent .got entries will continue to bounce through the .plt. */
- if (gotent->next)
- {
- srel = bfd_get_section_by_name (dynobj, ".rela.got");
- BFD_ASSERT (! info->shared || srel != NULL);
+ /* Fill in the entry in the procedure linkage table. */
+ if (elf64_alpha_use_secureplt)
+ {
+ disp = (PLT_HEADER_SIZE - 4) - (gotent->plt_offset + 4);
+ insn = INSN_AD (INSN_BR, 31, disp);
+ bfd_put_32 (output_bfd, insn,
+ splt->contents + gotent->plt_offset);
- gotent = gotent->next;
- do
- {
- sgot = alpha_elf_tdata(gotent->gotobj)->got;
- BFD_ASSERT(sgot != NULL);
- BFD_ASSERT(gotent->addend == 0);
+ plt_index = ((gotent->plt_offset - NEW_PLT_HEADER_SIZE)
+ / NEW_PLT_ENTRY_SIZE);
+ }
+ else
+ {
+ disp = -(gotent->plt_offset + 4);
+ insn = INSN_AD (INSN_BR, 28, disp);
+ bfd_put_32 (output_bfd, insn,
+ splt->contents + gotent->plt_offset);
+ bfd_put_32 (output_bfd, INSN_UNOP,
+ splt->contents + gotent->plt_offset + 4);
+ bfd_put_32 (output_bfd, INSN_UNOP,
+ splt->contents + gotent->plt_offset + 8);
+
+ plt_index = ((gotent->plt_offset - OLD_PLT_HEADER_SIZE)
+ / OLD_PLT_ENTRY_SIZE);
+ }
- bfd_put_64 (output_bfd, plt_addr,
- sgot->contents + gotent->got_offset);
+ /* Fill in the entry in the .rela.plt section. */
+ outrel.r_offset = got_addr;
+ outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
+ outrel.r_addend = 0;
- if (info->shared)
- {
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE);
- outrel.r_addend = plt_addr;
-
- loc = srel->contents;
- loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
- BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count
- <= srel->_cooked_size);
- }
+ loc = srel->contents + plt_index * sizeof (Elf64_External_Rela);
+ bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
- gotent = gotent->next;
- }
- while (gotent != NULL);
- }
+ /* Fill in the entry in the .got. */
+ bfd_put_64 (output_bfd, plt_addr,
+ sgot->contents + gotent->got_offset);
+ }
}
else if (alpha_elf_dynamic_symbol_p (h, info))
{
/* Fill in the dynamic relocations for this symbol's .got entries. */
asection *srel;
- Elf_Internal_Rela outrel;
- bfd_byte *loc;
struct alpha_elf_got_entry *gotent;
srel = bfd_get_section_by_name (dynobj, ".rela.got");
gotent = gotent->next)
{
asection *sgot;
- int r_type;
+ long r_type;
if (gotent->use_count == 0)
continue;
sgot = alpha_elf_tdata (gotent->gotobj)->got;
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
r_type = gotent->reloc_type;
switch (r_type)
abort ();
}
- outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
- outrel.r_addend = gotent->addend;
-
- loc = srel->contents;
- loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
+ elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
+ gotent->got_offset, h->dynindx,
+ r_type, gotent->addend);
if (gotent->reloc_type == R_ALPHA_TLSGD)
- {
- outrel.r_offset += 8;
- outrel.r_info = ELF64_R_INFO (h->dynindx, R_ALPHA_DTPREL64);
-
- loc = srel->contents;
- loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
- }
-
- BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count
- <= srel->_cooked_size);
+ elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
+ gotent->got_offset + 8, h->dynindx,
+ R_ALPHA_DTPREL64, gotent->addend);
}
}
/* Mark some specially defined symbols as absolute. */
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
- || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
- || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
+ || h == elf_hash_table (info)->hgot
+ || h == elf_hash_table (info)->hplt)
sym->st_shndx = SHN_ABS;
- return true;
+ return TRUE;
}
/* Finish up the dynamic sections. */
-static boolean
-elf64_alpha_finish_dynamic_sections (output_bfd, info)
- bfd *output_bfd;
- struct bfd_link_info *info;
+static bfd_boolean
+elf64_alpha_finish_dynamic_sections (bfd *output_bfd,
+ struct bfd_link_info *info)
{
bfd *dynobj;
asection *sdyn;
if (elf_hash_table (info)->dynamic_sections_created)
{
- asection *splt;
+ asection *splt, *sgotplt, *srelaplt;
Elf64_External_Dyn *dyncon, *dynconend;
+ bfd_vma plt_vma, gotplt_vma;
splt = bfd_get_section_by_name (dynobj, ".plt");
+ srelaplt = bfd_get_section_by_name (output_bfd, ".rela.plt");
BFD_ASSERT (splt != NULL && sdyn != NULL);
+ plt_vma = splt->output_section->vma + splt->output_offset;
+
+ gotplt_vma = 0;
+ if (elf64_alpha_use_secureplt)
+ {
+ sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
+ BFD_ASSERT (sgotplt != NULL);
+ if (sgotplt->size > 0)
+ gotplt_vma = sgotplt->output_section->vma + sgotplt->output_offset;
+ }
+
dyncon = (Elf64_External_Dyn *) sdyn->contents;
- dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
+ dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
- const char *name;
- asection *s;
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
case DT_PLTGOT:
- name = ".plt";
- goto get_vma;
+ dyn.d_un.d_ptr
+ = elf64_alpha_use_secureplt ? gotplt_vma : plt_vma;
+ break;
case DT_PLTRELSZ:
- name = ".rela.plt";
- goto get_size;
+ dyn.d_un.d_val = srelaplt ? srelaplt->size : 0;
+ break;
case DT_JMPREL:
- name = ".rela.plt";
- goto get_vma;
+ dyn.d_un.d_ptr = srelaplt ? srelaplt->vma : 0;
+ break;
case DT_RELASZ:
/* My interpretation of the TIS v1.1 ELF document indicates
the rest of the BFD does. It is, however, what the
glibc ld.so wants. Do this fixup here until we found
out who is right. */
- s = bfd_get_section_by_name (output_bfd, ".rela.plt");
- if (s)
- {
- dyn.d_un.d_val -=
- (s->_cooked_size ? s->_cooked_size : s->_raw_size);
- }
- break;
-
- get_vma:
- s = bfd_get_section_by_name (output_bfd, name);
- dyn.d_un.d_ptr = (s ? s->vma : 0);
- break;
-
- get_size:
- s = bfd_get_section_by_name (output_bfd, name);
- dyn.d_un.d_val =
- (s->_cooked_size ? s->_cooked_size : s->_raw_size);
+ if (srelaplt)
+ dyn.d_un.d_val -= srelaplt->size;
break;
}
bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
}
- /* Initialize the PLT0 entry */
- if (splt->_raw_size > 0)
+ /* Initialize the plt header. */
+ if (splt->size > 0)
{
- bfd_put_32 (output_bfd, PLT_HEADER_WORD1, splt->contents);
- bfd_put_32 (output_bfd, PLT_HEADER_WORD2, splt->contents + 4);
- bfd_put_32 (output_bfd, PLT_HEADER_WORD3, splt->contents + 8);
- bfd_put_32 (output_bfd, PLT_HEADER_WORD4, splt->contents + 12);
+ unsigned int insn;
+ int ofs;
+
+ if (elf64_alpha_use_secureplt)
+ {
+ ofs = gotplt_vma - (plt_vma + PLT_HEADER_SIZE);
+
+ insn = INSN_ABC (INSN_SUBQ, 27, 28, 25);
+ bfd_put_32 (output_bfd, insn, splt->contents);
+
+ insn = INSN_ABO (INSN_LDAH, 28, 28, (ofs + 0x8000) >> 16);
+ bfd_put_32 (output_bfd, insn, splt->contents + 4);
+
+ insn = INSN_ABC (INSN_S4SUBQ, 25, 25, 25);
+ bfd_put_32 (output_bfd, insn, splt->contents + 8);
+
+ insn = INSN_ABO (INSN_LDA, 28, 28, ofs);
+ bfd_put_32 (output_bfd, insn, splt->contents + 12);
+
+ insn = INSN_ABO (INSN_LDQ, 27, 28, 0);
+ bfd_put_32 (output_bfd, insn, splt->contents + 16);
+
+ insn = INSN_ABC (INSN_ADDQ, 25, 25, 25);
+ bfd_put_32 (output_bfd, insn, splt->contents + 20);
+
+ insn = INSN_ABO (INSN_LDQ, 28, 28, 8);
+ bfd_put_32 (output_bfd, insn, splt->contents + 24);
+
+ insn = INSN_AB (INSN_JMP, 31, 27);
+ bfd_put_32 (output_bfd, insn, splt->contents + 28);
+
+ insn = INSN_AD (INSN_BR, 28, -PLT_HEADER_SIZE);
+ bfd_put_32 (output_bfd, insn, splt->contents + 32);
+ }
+ else
+ {
+ insn = INSN_AD (INSN_BR, 27, 0); /* br $27, .+4 */
+ bfd_put_32 (output_bfd, insn, splt->contents);
+
+ insn = INSN_ABO (INSN_LDQ, 27, 27, 12);
+ bfd_put_32 (output_bfd, insn, splt->contents + 4);
- /* The next two words will be filled in by ld.so */
- bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 16);
- bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 24);
+ insn = INSN_UNOP;
+ bfd_put_32 (output_bfd, insn, splt->contents + 8);
- elf_section_data (splt->output_section)->this_hdr.sh_entsize =
- PLT_HEADER_SIZE;
+ insn = INSN_AB (INSN_JMP, 27, 27);
+ bfd_put_32 (output_bfd, insn, splt->contents + 12);
+
+ /* The next two words will be filled in by ld.so. */
+ bfd_put_64 (output_bfd, 0, splt->contents + 16);
+ bfd_put_64 (output_bfd, 0, splt->contents + 24);
+ }
+
+ elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0;
}
}
- return true;
+ return TRUE;
}
/* We need to use a special link routine to handle the .mdebug section.
We need to merge all instances of these sections together, not write
them all out sequentially. */
-static boolean
-elf64_alpha_final_link (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
+static bfd_boolean
+elf64_alpha_final_link (bfd *abfd, struct bfd_link_info *info)
{
asection *o;
struct bfd_link_order *p;
const struct ecoff_debug_swap *swap
= get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
HDRR *symhdr = &debug.symbolic_header;
- PTR mdebug_handle = NULL;
+ void * mdebug_handle = NULL;
+ struct alpha_elf_link_hash_table * htab;
+
+ htab = alpha_elf_hash_table (info);
+ if (htab == NULL)
+ return FALSE;
/* Go through the sections and collect the mdebug information. */
mdebug_sec = NULL;
mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
if (mdebug_handle == (PTR) NULL)
- return false;
+ return FALSE;
if (1)
{
if (s != NULL)
{
esym.asym.value = s->vma;
- last = s->vma + s->_raw_size;
+ last = s->vma + s->size;
}
else
esym.asym.value = last;
if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
name[i], &esym))
- return false;
+ return FALSE;
}
}
- for (p = o->link_order_head;
+ for (p = o->map_head.link_order;
p != (struct bfd_link_order *) NULL;
p = p->next)
{
input_section = p->u.indirect.section;
input_bfd = input_section->owner;
- if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
- || (get_elf_backend_data (input_bfd)
- ->elf_backend_ecoff_debug_swap) == NULL)
- {
- /* I don't know what a non ALPHA ELF bfd would be
- doing with a .mdebug section, but I don't really
- want to deal with it. */
- continue;
- }
+ if (! is_alpha_elf (input_bfd))
+ /* I don't know what a non ALPHA ELF bfd would be
+ doing with a .mdebug section, but I don't really
+ want to deal with it. */
+ continue;
input_swap = (get_elf_backend_data (input_bfd)
->elf_backend_ecoff_debug_swap);
- BFD_ASSERT (p->size == input_section->_raw_size);
+ BFD_ASSERT (p->size == input_section->size);
/* The ECOFF linking code expects that we have already
read in the debugging information and set up an
ecoff_debug_info structure, so we do that now. */
if (!elf64_alpha_read_ecoff_info (input_bfd, input_section,
&input_debug))
- return false;
+ return FALSE;
if (! (bfd_ecoff_debug_accumulate
(mdebug_handle, abfd, &debug, swap, input_bfd,
&input_debug, input_swap, info)))
- return false;
+ return FALSE;
/* Loop through the external symbols. For each one with
interesting information, try to find the symbol in
the linker global hash table and save the information
for the output external symbols. */
- eraw_src = input_debug.external_ext;
+ eraw_src = (char *) input_debug.external_ext;
eraw_end = (eraw_src
+ (input_debug.symbolic_header.iextMax
* input_swap->external_ext_size));
continue;
name = input_debug.ssext + ext.asym.iss;
- h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info),
- name, false, false, true);
+ h = alpha_elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE);
if (h == NULL || h->esym.ifd != -2)
continue;
einfo.info = info;
einfo.debug = &debug;
einfo.swap = swap;
- einfo.failed = false;
+ einfo.failed = FALSE;
elf_link_hash_traverse (elf_hash_table (info),
elf64_alpha_output_extsym,
(PTR) &einfo);
if (einfo.failed)
- return false;
+ return FALSE;
/* Set the size of the .mdebug section. */
- o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap);
+ o->size = bfd_ecoff_debug_size (abfd, &debug, swap);
/* Skip this section later on (I don't think this currently
matters, but someday it might). */
- o->link_order_head = (struct bfd_link_order *) NULL;
+ o->map_head.link_order = (struct bfd_link_order *) NULL;
mdebug_sec = o;
}
}
/* Invoke the regular ELF backend linker to do all the work. */
- if (! bfd_elf64_bfd_final_link (abfd, info))
- return false;
+ if (! bfd_elf_final_link (abfd, info))
+ return FALSE;
/* Now write out the computed sections. */
/* The .got subsections... */
{
bfd *i, *dynobj = elf_hash_table(info)->dynobj;
- for (i = alpha_elf_hash_table(info)->got_list;
+ for (i = htab->got_list;
i != NULL;
i = alpha_elf_tdata(i)->got_link_next)
{
if (! bfd_set_section_contents (abfd, sgot->output_section,
sgot->contents,
(file_ptr) sgot->output_offset,
- sgot->_raw_size))
- return false;
+ sgot->size))
+ return FALSE;
}
}
if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
swap, info,
mdebug_sec->filepos))
- return false;
+ return FALSE;
bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
}
- return true;
+ return TRUE;
}
static enum elf_reloc_type_class
-elf64_alpha_reloc_type_class (rela)
- const Elf_Internal_Rela *rela;
+elf64_alpha_reloc_type_class (const Elf_Internal_Rela *rela)
{
switch ((int) ELF64_R_TYPE (rela->r_info))
{
}
}
\f
+static const struct bfd_elf_special_section elf64_alpha_special_sections[] =
+{
+ { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
+ { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
+ { NULL, 0, 0, 0, 0 }
+};
+
/* ECOFF swapping routines. These are used when dealing with the
.mdebug section, which is in the ECOFF debugging format. Copied
from elf32-mips.c. */
sizeof (Elf_External_Note),
8,
1,
- 64, 8,
+ 64, 3,
ELFCLASS64, EV_CURRENT,
bfd_elf64_write_out_phdrs,
bfd_elf64_write_shdrs_and_ehdr,
+ bfd_elf64_checksum_contents,
bfd_elf64_write_relocs,
bfd_elf64_swap_symbol_in,
bfd_elf64_swap_symbol_out,
#define TARGET_LITTLE_SYM bfd_elf64_alpha_vec
#define TARGET_LITTLE_NAME "elf64-alpha"
#define ELF_ARCH bfd_arch_alpha
+#define ELF_TARGET_ID ALPHA_ELF_DATA
#define ELF_MACHINE_CODE EM_ALPHA
#define ELF_MAXPAGESIZE 0x10000
+#define ELF_COMMONPAGESIZE 0x2000
#define bfd_elf64_bfd_link_hash_table_create \
elf64_alpha_bfd_link_hash_table_create
#define bfd_elf64_bfd_reloc_type_lookup \
elf64_alpha_bfd_reloc_type_lookup
+#define bfd_elf64_bfd_reloc_name_lookup \
+ elf64_alpha_bfd_reloc_name_lookup
#define elf_info_to_howto \
elf64_alpha_info_to_howto
#define elf_backend_add_symbol_hook \
elf64_alpha_add_symbol_hook
+#define elf_backend_relocs_compatible \
+ _bfd_elf_relocs_compatible
#define elf_backend_check_relocs \
elf64_alpha_check_relocs
#define elf_backend_create_dynamic_sections \
elf64_alpha_create_dynamic_sections
#define elf_backend_adjust_dynamic_symbol \
elf64_alpha_adjust_dynamic_symbol
+#define elf_backend_merge_symbol_attribute \
+ elf64_alpha_merge_symbol_attribute
+#define elf_backend_copy_indirect_symbol \
+ elf64_alpha_copy_indirect_symbol
#define elf_backend_always_size_sections \
elf64_alpha_always_size_sections
#define elf_backend_size_dynamic_sections \
elf64_alpha_size_dynamic_sections
+#define elf_backend_omit_section_dynsym \
+ ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
#define elf_backend_relocate_section \
elf64_alpha_relocate_section
#define elf_backend_finish_dynamic_symbol \
#define elf_backend_reloc_type_class \
elf64_alpha_reloc_type_class
+#define elf_backend_can_gc_sections 1
+#define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
+#define elf_backend_gc_sweep_hook elf64_alpha_gc_sweep_hook
+
#define elf_backend_ecoff_debug_swap \
&elf64_alpha_ecoff_debug_swap
#define elf_backend_size_info \
alpha_elf_size_info
+#define elf_backend_special_sections \
+ elf64_alpha_special_sections
+
/* A few constants that determine how the .plt section is set up. */
#define elf_backend_want_got_plt 0
#define elf_backend_plt_readonly 0
#define elf_backend_want_plt_sym 1
#define elf_backend_got_header_size 0
-#define elf_backend_plt_header_size PLT_HEADER_SIZE
#include "elf64-target.h"
\f
#define TARGET_LITTLE_SYM bfd_elf64_alpha_freebsd_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
+#undef ELF_OSABI
+#define ELF_OSABI ELFOSABI_FREEBSD
/* The kernel recognizes executables as valid only if they carry a
"FreeBSD" label in the ELF header. So we put this label on all
executables and (for simplicity) also all other object files. */
-static void elf64_alpha_fbsd_post_process_headers
- PARAMS ((bfd *, struct bfd_link_info *));
-
static void
-elf64_alpha_fbsd_post_process_headers (abfd, link_info)
- bfd * abfd;
- struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
+elf64_alpha_fbsd_post_process_headers (bfd * abfd,
+ struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
{
Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
i_ehdrp = elf_elfheader (abfd);
/* Put an ABI label supported by FreeBSD >= 4.1. */
- i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
+ i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
#ifdef OLD_FREEBSD_ABI_LABEL
/* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
#define elf_backend_post_process_headers \
elf64_alpha_fbsd_post_process_headers
+#undef elf64_bed
#define elf64_bed elf64_alpha_fbsd_bed
#include "elf64-target.h"
projects / external / binutils.git / blobdiff