/* ELF executable support for BFD.
Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002 Free Software Foundation, Inc.
+ 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
+ Free Software Foundation, Inc.
Written by Fred Fish @ Cygnus Support, from information published
in "UNIX System V Release 4, Programmers Guide: ANSI C and
Meissner (Open Software Foundation), and Peter Hoogenboom (University
of Utah) to finish and extend this.
-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. */
/* Problems and other issues to resolve.
(1) BFD expects there to be some fixed number of "sections" in
- the object file. I.E. there is a "section_count" variable in the
+ the object file. I.E. there is a "section_count" variable in the
bfd structure which contains the number of sections. However, ELF
supports multiple "views" of a file. In particular, with current
implementations, executable files typically have two tables, a
it's cast in stone.
*/
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libiberty.h"
#include "bfdlink.h"
#include "libbfd.h"
#define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal)
#define elf_core_file_matches_executable_p \
NAME(bfd_elf,core_file_matches_executable_p)
+#define elf_core_file_pid NAME(bfd_elf,core_file_pid)
#define elf_object_p NAME(bfd_elf,object_p)
#define elf_core_file_p NAME(bfd_elf,core_file_p)
#define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound)
#define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound)
#define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc)
#define elf_slurp_symbol_table NAME(bfd_elf,slurp_symbol_table)
-#define elf_get_symtab NAME(bfd_elf,get_symtab)
+#define elf_canonicalize_symtab NAME(bfd_elf,canonicalize_symtab)
#define elf_canonicalize_dynamic_symtab \
NAME(bfd_elf,canonicalize_dynamic_symtab)
+#define elf_get_synthetic_symtab \
+ NAME(bfd_elf,get_synthetic_symtab)
#define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol)
#define elf_get_symbol_info NAME(bfd_elf,get_symbol_info)
#define elf_get_lineno NAME(bfd_elf,get_lineno)
#define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto)
#define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel)
#define elf_find_section NAME(bfd_elf,find_section)
-#define elf_bfd_link_add_symbols NAME(bfd_elf,bfd_link_add_symbols)
-#define elf_add_dynamic_entry NAME(bfd_elf,add_dynamic_entry)
#define elf_write_shdrs_and_ehdr NAME(bfd_elf,write_shdrs_and_ehdr)
#define elf_write_out_phdrs NAME(bfd_elf,write_out_phdrs)
+#define elf_checksum_contents NAME(bfd_elf,checksum_contents)
#define elf_write_relocs NAME(bfd_elf,write_relocs)
#define elf_slurp_reloc_table NAME(bfd_elf,slurp_reloc_table)
-#define elf_link_create_dynamic_sections \
- NAME(bfd_elf,link_create_dynamic_sections)
-#define elf_bfd_discard_info NAME(bfd_elf,discard_info)
-#define elf_reloc_symbol_deleted_p NAME(_bfd_elf,reloc_symbol_deleted_p)
-#define elf_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
-#define elf_bfd_final_link NAME(bfd_elf,bfd_final_link)
-#define elf_create_pointer_linker_section NAME(bfd_elf,create_pointer_linker_section)
-#define elf_finish_pointer_linker_section NAME(bfd_elf,finish_pointer_linker_section)
-#define elf_gc_sections NAME(_bfd_elf,gc_sections)
-#define elf_gc_common_finalize_got_offsets \
- NAME(_bfd_elf,gc_common_finalize_got_offsets)
-#define elf_gc_common_final_link NAME(_bfd_elf,gc_common_final_link)
-#define elf_gc_record_vtinherit NAME(_bfd_elf,gc_record_vtinherit)
-#define elf_gc_record_vtentry NAME(_bfd_elf,gc_record_vtentry)
-#define elf_link_record_local_dynamic_symbol \
- NAME(_bfd_elf,link_record_local_dynamic_symbol)
#if ARCH_SIZE == 64
#define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y)
#define LOG_FILE_ALIGN 2
#endif
-/* Static functions */
-
-static void elf_swap_ehdr_in
- PARAMS ((bfd *, const Elf_External_Ehdr *, Elf_Internal_Ehdr *));
-static void elf_swap_ehdr_out
- PARAMS ((bfd *, const Elf_Internal_Ehdr *, Elf_External_Ehdr *));
-static void elf_swap_shdr_in
- PARAMS ((bfd *, const Elf_External_Shdr *, Elf_Internal_Shdr *));
-static void elf_swap_shdr_out
- PARAMS ((bfd *, const Elf_Internal_Shdr *, Elf_External_Shdr *));
-
-#define elf_stringtab_init _bfd_elf_stringtab_init
-
-#define section_from_elf_index bfd_section_from_elf_index
-
-static boolean elf_slurp_reloc_table_from_section
- PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, bfd_size_type,
- arelent *, asymbol **, boolean));
-
-static boolean elf_file_p PARAMS ((Elf_External_Ehdr *));
-
-#ifdef DEBUG
-static void elf_debug_section PARAMS ((int, Elf_Internal_Shdr *));
-static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *));
-static char *elf_symbol_flags PARAMS ((flagword));
+#if DEBUG & 2
+static void elf_debug_section (int, Elf_Internal_Shdr *);
+#endif
+#if DEBUG & 1
+static void elf_debug_file (Elf_Internal_Ehdr *);
#endif
\f
/* Structure swapping routines */
/* Translate an ELF symbol in external format into an ELF symbol in internal
format. */
-void
-elf_swap_symbol_in (abfd, psrc, pshn, dst)
- bfd *abfd;
- const PTR psrc;
- const PTR pshn;
- Elf_Internal_Sym *dst;
+bfd_boolean
+elf_swap_symbol_in (bfd *abfd,
+ const void *psrc,
+ const void *pshn,
+ Elf_Internal_Sym *dst)
{
const Elf_External_Sym *src = (const Elf_External_Sym *) psrc;
const Elf_External_Sym_Shndx *shndx = (const Elf_External_Sym_Shndx *) pshn;
dst->st_info = H_GET_8 (abfd, src->st_info);
dst->st_other = H_GET_8 (abfd, src->st_other);
dst->st_shndx = H_GET_16 (abfd, src->st_shndx);
- if (dst->st_shndx == SHN_XINDEX)
+ if (dst->st_shndx == (SHN_XINDEX & 0xffff))
{
if (shndx == NULL)
- abort ();
+ return FALSE;
dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx);
}
+ else if (dst->st_shndx >= (SHN_LORESERVE & 0xffff))
+ dst->st_shndx += SHN_LORESERVE - (SHN_LORESERVE & 0xffff);
+ dst->st_target_internal = 0;
+ return TRUE;
}
/* Translate an ELF symbol in internal format into an ELF symbol in external
format. */
void
-elf_swap_symbol_out (abfd, src, cdst, shndx)
- bfd *abfd;
- const Elf_Internal_Sym *src;
- PTR cdst;
- PTR shndx;
+elf_swap_symbol_out (bfd *abfd,
+ const Elf_Internal_Sym *src,
+ void *cdst,
+ void *shndx)
{
unsigned int tmp;
Elf_External_Sym *dst = (Elf_External_Sym *) cdst;
H_PUT_8 (abfd, src->st_info, dst->st_info);
H_PUT_8 (abfd, src->st_other, dst->st_other);
tmp = src->st_shndx;
- if (tmp > SHN_HIRESERVE)
+ if (tmp >= (SHN_LORESERVE & 0xffff) && tmp < SHN_LORESERVE)
{
if (shndx == NULL)
abort ();
H_PUT_32 (abfd, tmp, shndx);
- tmp = SHN_XINDEX;
+ tmp = SHN_XINDEX & 0xffff;
}
H_PUT_16 (abfd, tmp, dst->st_shndx);
}
internal format. */
static void
-elf_swap_ehdr_in (abfd, src, dst)
- bfd *abfd;
- const Elf_External_Ehdr *src;
- Elf_Internal_Ehdr *dst;
+elf_swap_ehdr_in (bfd *abfd,
+ const Elf_External_Ehdr *src,
+ Elf_Internal_Ehdr *dst)
{
int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
external format. */
static void
-elf_swap_ehdr_out (abfd, src, dst)
- bfd *abfd;
- const Elf_Internal_Ehdr *src;
- Elf_External_Ehdr *dst;
+elf_swap_ehdr_out (bfd *abfd,
+ const Elf_Internal_Ehdr *src,
+ Elf_External_Ehdr *dst)
{
unsigned int tmp;
int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
H_PUT_32 (abfd, src->e_flags, dst->e_flags);
H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize);
H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize);
- H_PUT_16 (abfd, src->e_phnum, dst->e_phnum);
+ tmp = src->e_phnum;
+ if (tmp > PN_XNUM)
+ tmp = PN_XNUM;
+ H_PUT_16 (abfd, tmp, dst->e_phnum);
H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize);
tmp = src->e_shnum;
- if (tmp >= SHN_LORESERVE)
+ if (tmp >= (SHN_LORESERVE & 0xffff))
tmp = SHN_UNDEF;
H_PUT_16 (abfd, tmp, dst->e_shnum);
tmp = src->e_shstrndx;
- if (tmp >= SHN_LORESERVE)
- tmp = SHN_XINDEX;
+ if (tmp >= (SHN_LORESERVE & 0xffff))
+ tmp = SHN_XINDEX & 0xffff;
H_PUT_16 (abfd, tmp, dst->e_shstrndx);
}
ELF section header table entry in internal format. */
static void
-elf_swap_shdr_in (abfd, src, dst)
- bfd *abfd;
- const Elf_External_Shdr *src;
- Elf_Internal_Shdr *dst;
+elf_swap_shdr_in (bfd *abfd,
+ const Elf_External_Shdr *src,
+ Elf_Internal_Shdr *dst)
{
int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
ELF section header table entry in external format. */
static void
-elf_swap_shdr_out (abfd, src, dst)
- bfd *abfd;
- const Elf_Internal_Shdr *src;
- Elf_External_Shdr *dst;
+elf_swap_shdr_out (bfd *abfd,
+ const Elf_Internal_Shdr *src,
+ Elf_External_Shdr *dst)
{
/* note that all elements of dst are *arrays of unsigned char* already... */
H_PUT_32 (abfd, src->sh_name, dst->sh_name);
ELF program header table entry in internal format. */
void
-elf_swap_phdr_in (abfd, src, dst)
- bfd *abfd;
- const Elf_External_Phdr *src;
- Elf_Internal_Phdr *dst;
+elf_swap_phdr_in (bfd *abfd,
+ const Elf_External_Phdr *src,
+ Elf_Internal_Phdr *dst)
{
int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
}
void
-elf_swap_phdr_out (abfd, src, dst)
- bfd *abfd;
- const Elf_Internal_Phdr *src;
- Elf_External_Phdr *dst;
+elf_swap_phdr_out (bfd *abfd,
+ const Elf_Internal_Phdr *src,
+ Elf_External_Phdr *dst)
{
+ const struct elf_backend_data *bed;
+ bfd_vma p_paddr;
+
+ bed = get_elf_backend_data (abfd);
+ p_paddr = bed->want_p_paddr_set_to_zero ? 0 : src->p_paddr;
+
/* note that all elements of dst are *arrays of unsigned char* already... */
H_PUT_32 (abfd, src->p_type, dst->p_type);
H_PUT_WORD (abfd, src->p_offset, dst->p_offset);
H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr);
- H_PUT_WORD (abfd, src->p_paddr, dst->p_paddr);
+ H_PUT_WORD (abfd, p_paddr, dst->p_paddr);
H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz);
H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz);
H_PUT_32 (abfd, src->p_flags, dst->p_flags);
}
/* Translate an ELF reloc from external format to internal format. */
-INLINE void
-elf_swap_reloc_in (abfd, src, dst)
- bfd *abfd;
- const Elf_External_Rel *src;
- Elf_Internal_Rel *dst;
+void
+elf_swap_reloc_in (bfd *abfd,
+ const bfd_byte *s,
+ Elf_Internal_Rela *dst)
{
+ const Elf_External_Rel *src = (const Elf_External_Rel *) s;
dst->r_offset = H_GET_WORD (abfd, src->r_offset);
dst->r_info = H_GET_WORD (abfd, src->r_info);
+ dst->r_addend = 0;
}
-INLINE void
-elf_swap_reloca_in (abfd, src, dst)
- bfd *abfd;
- const Elf_External_Rela *src;
- Elf_Internal_Rela *dst;
+void
+elf_swap_reloca_in (bfd *abfd,
+ const bfd_byte *s,
+ Elf_Internal_Rela *dst)
{
+ const Elf_External_Rela *src = (const Elf_External_Rela *) s;
dst->r_offset = H_GET_WORD (abfd, src->r_offset);
dst->r_info = H_GET_WORD (abfd, src->r_info);
dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend);
}
/* Translate an ELF reloc from internal format to external format. */
-INLINE void
-elf_swap_reloc_out (abfd, src, dst)
- bfd *abfd;
- const Elf_Internal_Rel *src;
- Elf_External_Rel *dst;
+void
+elf_swap_reloc_out (bfd *abfd,
+ const Elf_Internal_Rela *src,
+ bfd_byte *d)
{
+ Elf_External_Rel *dst = (Elf_External_Rel *) d;
H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
H_PUT_WORD (abfd, src->r_info, dst->r_info);
}
-INLINE void
-elf_swap_reloca_out (abfd, src, dst)
- bfd *abfd;
- const Elf_Internal_Rela *src;
- Elf_External_Rela *dst;
+void
+elf_swap_reloca_out (bfd *abfd,
+ const Elf_Internal_Rela *src,
+ bfd_byte *d)
{
+ Elf_External_Rela *dst = (Elf_External_Rela *) d;
H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
H_PUT_WORD (abfd, src->r_info, dst->r_info);
H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend);
}
-INLINE void
-elf_swap_dyn_in (abfd, p, dst)
- bfd *abfd;
- const PTR p;
- Elf_Internal_Dyn *dst;
+void
+elf_swap_dyn_in (bfd *abfd,
+ const void *p,
+ Elf_Internal_Dyn *dst)
{
const Elf_External_Dyn *src = (const Elf_External_Dyn *) p;
dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val);
}
-INLINE void
-elf_swap_dyn_out (abfd, src, p)
- bfd *abfd;
- const Elf_Internal_Dyn *src;
- PTR p;
+void
+elf_swap_dyn_out (bfd *abfd,
+ const Elf_Internal_Dyn *src,
+ void *p)
{
Elf_External_Dyn *dst = (Elf_External_Dyn *) p;
First we validate the file by reading in the ELF header and checking
the magic number. */
-static INLINE boolean
-elf_file_p (x_ehdrp)
- Elf_External_Ehdr *x_ehdrp;
+static inline bfd_boolean
+elf_file_p (Elf_External_Ehdr *x_ehdrp)
{
return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0)
&& (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1)
&& (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3));
}
-struct bfd_preserve
-{
- const struct bfd_arch_info *arch_info;
- struct elf_obj_tdata *tdata;
- struct bfd_hash_table section_htab;
- struct sec *sections;
- struct sec **section_tail;
- unsigned int section_count;
-};
-
/* Check to see if the file associated with ABFD matches the target vector
that ABFD points to.
file does not match the target vector. */
const bfd_target *
-elf_object_p (abfd)
- bfd *abfd;
+elf_object_p (bfd *abfd)
{
Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
Elf_Internal_Shdr i_shdr;
Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */
unsigned int shindex;
- char *shstrtab; /* Internal copy of section header stringtab */
- struct elf_backend_data *ebd;
+ const struct elf_backend_data *ebd;
struct bfd_preserve preserve;
- struct elf_obj_tdata *new_tdata = NULL;
asection *s;
bfd_size_type amt;
+ const bfd_target *target;
- preserve.arch_info = abfd->arch_info;
+ preserve.marker = NULL;
/* Read in the ELF header in external format. */
- if (bfd_bread ((PTR) & x_ehdr, (bfd_size_type) sizeof (x_ehdr), abfd)
- != sizeof (x_ehdr))
+ if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr))
{
if (bfd_get_error () != bfd_error_system_call)
goto got_wrong_format_error;
section header table (FIXME: See comments re sections at top of this
file). */
- if ((elf_file_p (&x_ehdr) == false) ||
- (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) ||
- (x_ehdr.e_ident[EI_CLASS] != ELFCLASS))
+ if (! elf_file_p (&x_ehdr)
+ || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT
+ || x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
goto got_wrong_format_error;
/* Check that file's byte order matches xvec's */
goto got_wrong_format_error;
}
+ if (!bfd_preserve_save (abfd, &preserve))
+ goto got_no_match;
+
+ target = abfd->xvec;
+
/* Allocate an instance of the elf_obj_tdata structure and hook it up to
the tdata pointer in the bfd. */
- amt = sizeof (struct elf_obj_tdata);
- new_tdata = (struct elf_obj_tdata *) bfd_zalloc (abfd, amt);
- if (new_tdata == NULL)
- goto got_no_match;
- preserve.tdata = elf_tdata (abfd);
- elf_tdata (abfd) = new_tdata;
-
- /* Clear section information, since there might be a recognized bfd that
- we now check if we can replace, and we don't want to append to it. */
- preserve.sections = abfd->sections;
- preserve.section_tail = abfd->section_tail;
- preserve.section_count = abfd->section_count;
- preserve.section_htab = abfd->section_htab;
- abfd->sections = NULL;
- abfd->section_tail = &abfd->sections;
- abfd->section_count = 0;
- if (!bfd_hash_table_init (&abfd->section_htab, bfd_section_hash_newfunc))
+ if (! (*target->_bfd_set_format[bfd_object]) (abfd))
goto got_no_match;
+ preserve.marker = elf_tdata (abfd);
/* Now that we know the byte order, swap in the rest of the header */
i_ehdrp = elf_elfheader (abfd);
if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL)
goto got_wrong_format_error;
- /* As a simple sanity check, verify that the what BFD thinks is the
+ /* As a simple sanity check, verify that what BFD thinks is the
size of each section header table entry actually matches the size
recorded in the file, but only if there are any sections. */
if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0)
goto got_wrong_format_error;
ebd = get_elf_backend_data (abfd);
+ if (ebd->s->arch_size != ARCH_SIZE)
+ goto got_wrong_format_error;
/* Check that the ELF e_machine field matches what this particular
BFD format expects. */
if (ebd->elf_machine_code != i_ehdrp->e_machine
- && (ebd->elf_machine_alt1 == 0 || i_ehdrp->e_machine != ebd->elf_machine_alt1)
- && (ebd->elf_machine_alt2 == 0 || i_ehdrp->e_machine != ebd->elf_machine_alt2))
- {
- const bfd_target * const *target_ptr;
-
- if (ebd->elf_machine_code != EM_NONE)
- goto got_wrong_format_error;
-
- /* This is the generic ELF target. Let it match any ELF target
- for which we do not have a specific backend. */
- for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
- {
- struct elf_backend_data *back;
-
- if ((*target_ptr)->flavour != bfd_target_elf_flavour)
- continue;
- back = (struct elf_backend_data *) (*target_ptr)->backend_data;
- if (back->elf_machine_code == i_ehdrp->e_machine
- || (back->elf_machine_alt1 != 0
- && back->elf_machine_alt1 == i_ehdrp->e_machine)
- || (back->elf_machine_alt2 != 0
- && back->elf_machine_alt2 == i_ehdrp->e_machine))
- {
- /* target_ptr is an ELF backend which matches this
- object file, so reject the generic ELF target. */
- goto got_wrong_format_error;
- }
- }
- }
+ && (ebd->elf_machine_alt1 == 0
+ || i_ehdrp->e_machine != ebd->elf_machine_alt1)
+ && (ebd->elf_machine_alt2 == 0
+ || i_ehdrp->e_machine != ebd->elf_machine_alt2)
+ && ebd->elf_machine_code != EM_NONE)
+ goto got_wrong_format_error;
if (i_ehdrp->e_type == ET_EXEC)
abfd->flags |= EXEC_P;
goto got_no_match;
}
- /* Remember the entry point specified in the ELF file header. */
- bfd_set_start_address (abfd, i_ehdrp->e_entry);
+ if (ebd->elf_machine_code != EM_NONE
+ && i_ehdrp->e_ident[EI_OSABI] != ebd->elf_osabi
+ && ebd->elf_osabi != ELFOSABI_NONE)
+ goto got_wrong_format_error;
if (i_ehdrp->e_shoff != 0)
{
+ bfd_signed_vma where = i_ehdrp->e_shoff;
+
+ if (where != (file_ptr) where)
+ goto got_wrong_format_error;
+
/* Seek to the section header table in the file. */
- if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0)
+ if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0)
goto got_no_match;
/* Read the first section header at index 0, and convert to internal
form. */
- if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd)
- != sizeof (x_shdr))
+ if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr))
goto got_no_match;
elf_swap_shdr_in (abfd, &x_shdr, &i_shdr);
/* If the section count is zero, the actual count is in the first
section header. */
if (i_ehdrp->e_shnum == SHN_UNDEF)
- i_ehdrp->e_shnum = i_shdr.sh_size;
+ {
+ i_ehdrp->e_shnum = i_shdr.sh_size;
+ if (i_ehdrp->e_shnum >= SHN_LORESERVE
+ || i_ehdrp->e_shnum != i_shdr.sh_size
+ || i_ehdrp->e_shnum == 0)
+ goto got_wrong_format_error;
+ }
/* And similarly for the string table index. */
- if (i_ehdrp->e_shstrndx == SHN_XINDEX)
- i_ehdrp->e_shstrndx = i_shdr.sh_link;
+ if (i_ehdrp->e_shstrndx == (SHN_XINDEX & 0xffff))
+ {
+ i_ehdrp->e_shstrndx = i_shdr.sh_link;
+ if (i_ehdrp->e_shstrndx != i_shdr.sh_link)
+ goto got_wrong_format_error;
+ }
+
+ /* And program headers. */
+ if (i_ehdrp->e_phnum == PN_XNUM && i_shdr.sh_info != 0)
+ {
+ i_ehdrp->e_phnum = i_shdr.sh_info;
+ if (i_ehdrp->e_phnum != i_shdr.sh_info)
+ goto got_wrong_format_error;
+ }
+
+ /* Sanity check that we can read all of the section headers.
+ It ought to be good enough to just read the last one. */
+ if (i_ehdrp->e_shnum != 1)
+ {
+ /* Check that we don't have a totally silly number of sections. */
+ if (i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (x_shdr)
+ || i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (i_shdr))
+ goto got_wrong_format_error;
+
+ where += (i_ehdrp->e_shnum - 1) * sizeof (x_shdr);
+ if (where != (file_ptr) where)
+ goto got_wrong_format_error;
+ if ((bfd_size_type) where <= i_ehdrp->e_shoff)
+ goto got_wrong_format_error;
+
+ if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0)
+ goto got_no_match;
+ if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr))
+ goto got_no_match;
+
+ /* Back to where we were. */
+ where = i_ehdrp->e_shoff + sizeof (x_shdr);
+ if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0)
+ goto got_no_match;
+ }
}
/* Allocate space for a copy of the section header table in
if (!i_shdrp)
goto got_no_match;
num_sec = i_ehdrp->e_shnum;
- if (num_sec > SHN_LORESERVE)
- num_sec += SHN_HIRESERVE + 1 - SHN_LORESERVE;
elf_numsections (abfd) = num_sec;
amt = sizeof (i_shdrp) * num_sec;
elf_elfsections (abfd) = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt);
goto got_no_match;
memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp));
- shdrp = i_shdrp;
- shindex = 0;
- if (num_sec > SHN_LORESERVE)
- {
- for ( ; shindex < SHN_LORESERVE; shindex++)
- elf_elfsections (abfd)[shindex] = shdrp++;
- for ( ; shindex < SHN_HIRESERVE + 1; shindex++)
- elf_elfsections (abfd)[shindex] = i_shdrp;
- }
- for ( ; shindex < num_sec; shindex++)
+ for (shdrp = i_shdrp, shindex = 0; shindex < num_sec; shindex++)
elf_elfsections (abfd)[shindex] = shdrp++;
/* Read in the rest of the section header table and convert it
to internal form. */
for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
{
- if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd)
- != sizeof (x_shdr))
+ if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr))
goto got_no_match;
elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);
+ /* Sanity check sh_link and sh_info. */
+ if (i_shdrp[shindex].sh_link >= num_sec)
+ {
+ /* PR 10478: Accept Solaris binaries with a sh_link
+ field set to SHN_BEFORE or SHN_AFTER. */
+ switch (ebd->elf_machine_code)
+ {
+ case EM_386:
+ case EM_486:
+ case EM_X86_64:
+ case EM_OLD_SPARCV9:
+ case EM_SPARC32PLUS:
+ case EM_SPARCV9:
+ case EM_SPARC:
+ if (i_shdrp[shindex].sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
+ || i_shdrp[shindex].sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
+ break;
+ /* Otherwise fall through. */
+ default:
+ goto got_wrong_format_error;
+ }
+ }
+
+ if (((i_shdrp[shindex].sh_flags & SHF_INFO_LINK)
+ || i_shdrp[shindex].sh_type == SHT_RELA
+ || i_shdrp[shindex].sh_type == SHT_REL)
+ && i_shdrp[shindex].sh_info >= num_sec)
+ goto got_wrong_format_error;
+
/* If the section is loaded, but not page aligned, clear
D_PAGED. */
if (i_shdrp[shindex].sh_size != 0
&& (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0
&& i_shdrp[shindex].sh_type != SHT_NOBITS
&& (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset)
- % ebd->maxpagesize)
+ % ebd->minpagesize)
!= 0))
abfd->flags &= ~D_PAGED;
}
}
- if (i_ehdrp->e_shstrndx && i_ehdrp->e_shoff)
+ /* A further sanity check. */
+ if (i_ehdrp->e_shnum != 0)
{
- if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx))
- goto got_no_match;
+ if (i_ehdrp->e_shstrndx >= elf_numsections (abfd))
+ {
+ /* PR 2257:
+ We used to just goto got_wrong_format_error here
+ but there are binaries in existance for which this test
+ will prevent the binutils from working with them at all.
+ So we are kind, and reset the string index value to 0
+ so that at least some processing can be done. */
+ i_ehdrp->e_shstrndx = SHN_UNDEF;
+ _bfd_error_handler (_("warning: %s has a corrupt string table index - ignoring"), abfd->filename);
+ }
}
+ else if (i_ehdrp->e_shstrndx != SHN_UNDEF)
+ goto got_wrong_format_error;
/* Read in the program headers. */
if (i_ehdrp->e_phnum == 0)
{
Elf_External_Phdr x_phdr;
- if (bfd_bread ((PTR) &x_phdr, (bfd_size_type) sizeof x_phdr, abfd)
- != sizeof x_phdr)
+ if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr)
goto got_no_match;
elf_swap_phdr_in (abfd, &x_phdr, i_phdr);
}
}
- /* Read in the string table containing the names of the sections. We
- will need the base pointer to this table later. */
- /* We read this inline now, so that we don't have to go through
- bfd_section_from_shdr with it (since this particular strtab is
- used to find all of the ELF section names.) */
-
- if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff)
+ if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff != 0)
{
unsigned int num_sec;
- shstrtab = bfd_elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
- if (!shstrtab)
- goto got_no_match;
-
/* Once all of the section headers have been read and converted, we
can start processing them. Note that the first section header is
a dummy placeholder entry, so we ignore it. */
num_sec = elf_numsections (abfd);
for (shindex = 1; shindex < num_sec; shindex++)
- {
- if (! bfd_section_from_shdr (abfd, shindex))
- goto got_no_match;
- if (shindex == SHN_LORESERVE - 1)
- shindex += SHN_HIRESERVE + 1 - SHN_LORESERVE;
- }
+ if (!bfd_section_from_shdr (abfd, shindex))
+ goto got_no_match;
+
+ /* Set up ELF sections for SHF_GROUP and SHF_LINK_ORDER. */
+ if (! _bfd_elf_setup_sections (abfd))
+ goto got_wrong_format_error;
}
/* Let the backend double check the format and override global
information. */
if (ebd->elf_backend_object_p)
{
- if ((*ebd->elf_backend_object_p) (abfd) == false)
+ if (! (*ebd->elf_backend_object_p) (abfd))
goto got_wrong_format_error;
}
+ /* Remember the entry point specified in the ELF file header. */
+ bfd_set_start_address (abfd, i_ehdrp->e_entry);
+
/* If we have created any reloc sections that are associated with
debugging sections, mark the reloc sections as debugging as well. */
for (s = abfd->sections; s != NULL; s = s->next)
}
}
- /* It would be nice to be able to free more memory here, eg. old
- elf_elfsections, old tdata, but that's not possible since these
- blocks are sitting inside obj_alloc'd memory. */
- bfd_hash_table_free (&preserve.section_htab);
- return (abfd->xvec);
+ bfd_preserve_finish (abfd, &preserve);
+ return target;
got_wrong_format_error:
/* There is way too much undoing of half-known state here. The caller,
bfd_set_error (bfd_error_wrong_format);
got_no_match:
- abfd->arch_info = preserve.arch_info;
- if (new_tdata != NULL)
- {
- /* bfd_release frees all memory more recently bfd_alloc'd than
- its arg, as well as its arg. */
- bfd_release (abfd, new_tdata);
- elf_tdata (abfd) = preserve.tdata;
- abfd->section_htab = preserve.section_htab;
- abfd->sections = preserve.sections;
- abfd->section_tail = preserve.section_tail;
- abfd->section_count = preserve.section_count;
- }
+ if (preserve.marker != NULL)
+ bfd_preserve_restore (abfd, &preserve);
return NULL;
}
\f
/* Write out the relocs. */
void
-elf_write_relocs (abfd, sec, data)
- bfd *abfd;
- asection *sec;
- PTR data;
+elf_write_relocs (bfd *abfd, asection *sec, void *data)
{
- boolean *failedp = (boolean *) data;
+ bfd_boolean *failedp = (bfd_boolean *) data;
Elf_Internal_Shdr *rela_hdr;
- Elf_External_Rela *outbound_relocas;
- Elf_External_Rel *outbound_relocs;
+ bfd_vma addr_offset;
+ void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *);
+ size_t extsize;
+ bfd_byte *dst_rela;
unsigned int idx;
- int use_rela_p;
- asymbol *last_sym = 0;
- int last_sym_idx = 0;
+ asymbol *last_sym;
+ int last_sym_idx;
/* If we have already failed, don't do anything. */
if (*failedp)
if (sec->reloc_count == 0)
return;
- rela_hdr = &elf_section_data (sec)->rel_hdr;
+ /* If we have opened an existing file for update, reloc_count may be
+ set even though we are not linking. In that case we have nothing
+ to do. */
+ if (sec->orelocation == NULL)
+ return;
+
+ rela_hdr = elf_section_data (sec)->rela.hdr;
+ if (rela_hdr == NULL)
+ rela_hdr = elf_section_data (sec)->rel.hdr;
rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count;
- rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size);
+ rela_hdr->contents = (unsigned char *) bfd_alloc (abfd, rela_hdr->sh_size);
if (rela_hdr->contents == NULL)
{
- *failedp = true;
+ *failedp = TRUE;
return;
}
/* Figure out whether the relocations are RELA or REL relocations. */
if (rela_hdr->sh_type == SHT_RELA)
- use_rela_p = true;
+ {
+ swap_out = elf_swap_reloca_out;
+ extsize = sizeof (Elf_External_Rela);
+ }
else if (rela_hdr->sh_type == SHT_REL)
- use_rela_p = false;
+ {
+ swap_out = elf_swap_reloc_out;
+ extsize = sizeof (Elf_External_Rel);
+ }
else
/* Every relocation section should be either an SHT_RELA or an
SHT_REL section. */
abort ();
+ /* The address of an ELF reloc is section relative for an object
+ file, and absolute for an executable file or shared library.
+ The address of a BFD reloc is always section relative. */
+ addr_offset = 0;
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
+ addr_offset = sec->vma;
+
/* orelocation has the data, reloc_count has the count... */
- if (use_rela_p)
- {
- outbound_relocas = (Elf_External_Rela *) rela_hdr->contents;
+ last_sym = 0;
+ last_sym_idx = 0;
+ dst_rela = rela_hdr->contents;
- for (idx = 0; idx < sec->reloc_count; idx++)
+ for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize)
+ {
+ Elf_Internal_Rela src_rela;
+ arelent *ptr;
+ asymbol *sym;
+ int n;
+
+ ptr = sec->orelocation[idx];
+ sym = *ptr->sym_ptr_ptr;
+ if (sym == last_sym)
+ n = last_sym_idx;
+ else if (bfd_is_abs_section (sym->section) && sym->value == 0)
+ n = STN_UNDEF;
+ else
{
- Elf_Internal_Rela dst_rela;
- Elf_External_Rela *src_rela;
- arelent *ptr;
- asymbol *sym;
- int n;
-
- ptr = sec->orelocation[idx];
- src_rela = outbound_relocas + idx;
-
- /* The address of an ELF reloc is section relative for an object
- file, and absolute for an executable file or shared library.
- The address of a BFD reloc is always section relative. */
- if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
- dst_rela.r_offset = ptr->address;
- else
- dst_rela.r_offset = ptr->address + sec->vma;
-
- sym = *ptr->sym_ptr_ptr;
- if (sym == last_sym)
- n = last_sym_idx;
- else if (bfd_is_abs_section (sym->section) && sym->value == 0)
- n = STN_UNDEF;
- else
+ last_sym = sym;
+ n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
+ if (n < 0)
{
- last_sym = sym;
- n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
- if (n < 0)
- {
- *failedp = true;
- return;
- }
- last_sym_idx = n;
- }
-
- if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
- && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
- && ! _bfd_elf_validate_reloc (abfd, ptr))
- {
- *failedp = true;
+ *failedp = TRUE;
return;
}
-
- dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type);
-
- dst_rela.r_addend = ptr->addend;
- elf_swap_reloca_out (abfd, &dst_rela, src_rela);
+ last_sym_idx = n;
}
- }
- else
- /* REL relocations */
- {
- outbound_relocs = (Elf_External_Rel *) rela_hdr->contents;
- for (idx = 0; idx < sec->reloc_count; idx++)
+ if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
+ && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
+ && ! _bfd_elf_validate_reloc (abfd, ptr))
{
- Elf_Internal_Rel dst_rel;
- Elf_External_Rel *src_rel;
- arelent *ptr;
- int n;
- asymbol *sym;
-
- ptr = sec->orelocation[idx];
- sym = *ptr->sym_ptr_ptr;
- src_rel = outbound_relocs + idx;
-
- /* The address of an ELF reloc is section relative for an object
- file, and absolute for an executable file or shared library.
- The address of a BFD reloc is always section relative. */
- if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
- dst_rel.r_offset = ptr->address;
- else
- dst_rel.r_offset = ptr->address + sec->vma;
-
- if (sym == last_sym)
- n = last_sym_idx;
- else if (bfd_is_abs_section (sym->section) && sym->value == 0)
- n = STN_UNDEF;
- else
- {
- last_sym = sym;
- n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
- if (n < 0)
- {
- *failedp = true;
- return;
- }
- last_sym_idx = n;
- }
-
- if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
- && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
- && ! _bfd_elf_validate_reloc (abfd, ptr))
- {
- *failedp = true;
- return;
- }
-
- dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type);
-
- elf_swap_reloc_out (abfd, &dst_rel, src_rel);
+ *failedp = TRUE;
+ return;
}
+
+ src_rela.r_offset = ptr->address + addr_offset;
+ src_rela.r_info = ELF_R_INFO (n, ptr->howto->type);
+ src_rela.r_addend = ptr->addend;
+ (*swap_out) (abfd, &src_rela, dst_rela);
}
}
/* Write out the program headers. */
int
-elf_write_out_phdrs (abfd, phdr, count)
- bfd *abfd;
- const Elf_Internal_Phdr *phdr;
- unsigned int count;
+elf_write_out_phdrs (bfd *abfd,
+ const Elf_Internal_Phdr *phdr,
+ unsigned int count)
{
while (count--)
{
Elf_External_Phdr extphdr;
elf_swap_phdr_out (abfd, phdr, &extphdr);
- if (bfd_bwrite (&extphdr, (bfd_size_type) sizeof (Elf_External_Phdr),
- abfd) != sizeof (Elf_External_Phdr))
+ if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd)
+ != sizeof (Elf_External_Phdr))
return -1;
phdr++;
}
/* Write out the section headers and the ELF file header. */
-boolean
-elf_write_shdrs_and_ehdr (abfd)
- bfd *abfd;
+bfd_boolean
+elf_write_shdrs_and_ehdr (bfd *abfd)
{
Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
amt = sizeof (x_ehdr);
if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
- || bfd_bwrite ((PTR) & x_ehdr, amt, abfd) != amt)
- return false;
+ || bfd_bwrite (&x_ehdr, amt, abfd) != amt)
+ return FALSE;
/* Some fields in the first section header handle overflow of ehdr
fields. */
- if (i_ehdrp->e_shnum >= SHN_LORESERVE)
+ if (i_ehdrp->e_phnum >= PN_XNUM)
+ i_shdrp[0]->sh_info = i_ehdrp->e_phnum;
+ if (i_ehdrp->e_shnum >= (SHN_LORESERVE & 0xffff))
i_shdrp[0]->sh_size = i_ehdrp->e_shnum;
- if (i_ehdrp->e_shstrndx >= SHN_LORESERVE)
+ if (i_ehdrp->e_shstrndx >= (SHN_LORESERVE & 0xffff))
i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx;
/* at this point we've concocted all the ELF sections... */
amt *= sizeof (*x_shdrp);
x_shdrp = (Elf_External_Shdr *) bfd_alloc (abfd, amt);
if (!x_shdrp)
- return false;
+ return FALSE;
for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++)
{
elf_debug_section (count, *i_shdrp);
#endif
elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count);
-
- if (count == SHN_LORESERVE - 1)
- i_shdrp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
}
if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0
- || bfd_bwrite ((PTR) x_shdrp, amt, abfd) != amt)
- return false;
+ || bfd_bwrite (x_shdrp, amt, abfd) != amt)
+ return FALSE;
/* need to dump the string table too... */
- return true;
+ return TRUE;
+}
+
+bfd_boolean
+elf_checksum_contents (bfd *abfd,
+ void (*process) (const void *, size_t, void *),
+ void *arg)
+{
+ Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
+ Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
+ Elf_Internal_Phdr *i_phdrp = elf_tdata (abfd)->phdr;
+ unsigned int count, num;
+
+ {
+ Elf_External_Ehdr x_ehdr;
+ Elf_Internal_Ehdr i_ehdr;
+
+ i_ehdr = *i_ehdrp;
+ i_ehdr.e_phoff = i_ehdr.e_shoff = 0;
+ elf_swap_ehdr_out (abfd, &i_ehdr, &x_ehdr);
+ (*process) (&x_ehdr, sizeof x_ehdr, arg);
+ }
+
+ num = i_ehdrp->e_phnum;
+ for (count = 0; count < num; count++)
+ {
+ Elf_External_Phdr x_phdr;
+ elf_swap_phdr_out (abfd, &i_phdrp[count], &x_phdr);
+ (*process) (&x_phdr, sizeof x_phdr, arg);
+ }
+
+ num = elf_numsections (abfd);
+ for (count = 0; count < num; count++)
+ {
+ Elf_Internal_Shdr i_shdr;
+ Elf_External_Shdr x_shdr;
+
+ i_shdr = *i_shdrp[count];
+ i_shdr.sh_offset = 0;
+
+ elf_swap_shdr_out (abfd, &i_shdr, &x_shdr);
+ (*process) (&x_shdr, sizeof x_shdr, arg);
+
+ /* PR ld/12451:
+ Process the section's contents, if it has some. Read them in if necessary. */
+ if (i_shdr.contents)
+ (*process) (i_shdr.contents, i_shdr.sh_size, arg);
+ else if (i_shdr.sh_type != SHT_NOBITS)
+ {
+ asection *sec;
+
+ sec = bfd_section_from_elf_index (abfd, count);
+ if (sec != NULL)
+ {
+ if (sec->contents == NULL)
+ {
+ /* Force rereading from file. */
+ sec->flags &= ~SEC_IN_MEMORY;
+ if (! bfd_malloc_and_get_section (abfd, sec, & sec->contents))
+ continue;
+ }
+ if (sec->contents != NULL)
+ (*process) (sec->contents, i_shdr.sh_size, arg);
+ }
+ }
+ }
+
+ return TRUE;
}
long
-elf_slurp_symbol_table (abfd, symptrs, dynamic)
- bfd *abfd;
- asymbol **symptrs; /* Buffer for generated bfd symbols */
- boolean dynamic;
+elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic)
{
Elf_Internal_Shdr *hdr;
Elf_Internal_Shdr *verhdr;
unsigned long symcount; /* Number of external ELF symbols */
elf_symbol_type *sym; /* Pointer to current bfd symbol */
elf_symbol_type *symbase; /* Buffer for generated bfd symbols */
- Elf_Internal_Sym i_sym;
- Elf_External_Sym *x_symp = NULL;
- Elf_External_Sym_Shndx *x_shndx = NULL;
- Elf_External_Versym *x_versymp = NULL;
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Sym *isymend;
+ Elf_Internal_Sym *isymbuf = NULL;
+ Elf_External_Versym *xver;
+ Elf_External_Versym *xverbuf = NULL;
+ const struct elf_backend_data *ebd;
bfd_size_type amt;
/* Read each raw ELF symbol, converting from external ELF form to
if (! dynamic)
{
- Elf_Internal_Shdr *shndx_hdr;
-
hdr = &elf_tdata (abfd)->symtab_hdr;
- shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
verhdr = NULL;
-
- /* If we have a SHT_SYMTAB_SHNDX section for the symbol table,
- read the raw contents. */
- if (elf_elfsections (abfd) != NULL
- && elf_elfsections (abfd)[shndx_hdr->sh_link] == hdr)
- {
- amt = shndx_hdr->sh_size;
- x_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
- if (x_shndx == NULL
- || bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
- || bfd_bread ((PTR) x_shndx, amt, abfd) != amt)
- goto error_return;
- }
}
else
{
|| (elf_tdata (abfd)->dynverref_section != 0
&& elf_tdata (abfd)->verref == NULL))
{
- if (! _bfd_elf_slurp_version_tables (abfd))
+ if (!_bfd_elf_slurp_version_tables (abfd, FALSE))
return -1;
}
}
- if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0)
- goto error_return;
-
+ ebd = get_elf_backend_data (abfd);
symcount = hdr->sh_size / sizeof (Elf_External_Sym);
-
if (symcount == 0)
sym = symbase = NULL;
else
{
- unsigned long i;
-
- if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0)
- goto error_return;
+ isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ return -1;
amt = symcount;
amt *= sizeof (elf_symbol_type);
symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt);
if (symbase == (elf_symbol_type *) NULL)
goto error_return;
- sym = symbase;
-
- /* Temporarily allocate room for the raw ELF symbols. */
- amt = symcount;
- amt *= sizeof (Elf_External_Sym);
- x_symp = (Elf_External_Sym *) bfd_malloc (amt);
- if (x_symp == NULL)
- goto error_return;
-
- if (bfd_bread ((PTR) x_symp, amt, abfd) != amt)
- goto error_return;
/* Read the raw ELF version symbol information. */
-
if (verhdr != NULL
&& verhdr->sh_size / sizeof (Elf_External_Versym) != symcount)
{
symcount);
/* Slurp in the symbols without the version information,
- since that is more helpful than just quitting. */
+ since that is more helpful than just quitting. */
verhdr = NULL;
}
if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0)
goto error_return;
- x_versymp = (Elf_External_Versym *) bfd_malloc (verhdr->sh_size);
- if (x_versymp == NULL && verhdr->sh_size != 0)
+ xverbuf = (Elf_External_Versym *) bfd_malloc (verhdr->sh_size);
+ if (xverbuf == NULL && verhdr->sh_size != 0)
goto error_return;
- if (bfd_bread ((PTR) x_versymp, verhdr->sh_size, abfd)
- != verhdr->sh_size)
+ if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size)
goto error_return;
}
/* Skip first symbol, which is a null dummy. */
- for (i = 1; i < symcount; i++)
+ xver = xverbuf;
+ if (xver != NULL)
+ ++xver;
+ isymend = isymbuf + symcount;
+ for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++)
{
- elf_swap_symbol_in (abfd, (const PTR) (x_symp + i),
- (const PTR) (x_shndx + (x_shndx ? i : 0)),
- &i_sym);
- memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym));
-#ifdef ELF_KEEP_EXTSYM
- memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym));
-#endif
+ memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym));
sym->symbol.the_bfd = abfd;
- sym->symbol.name = bfd_elf_string_from_elf_section (abfd,
- hdr->sh_link,
- i_sym.st_name);
+ sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym, NULL);
- sym->symbol.value = i_sym.st_value;
+ sym->symbol.value = isym->st_value;
- if (i_sym.st_shndx == SHN_UNDEF)
+ if (isym->st_shndx == SHN_UNDEF)
{
sym->symbol.section = bfd_und_section_ptr;
}
- else if (i_sym.st_shndx < SHN_LORESERVE
- || i_sym.st_shndx > SHN_HIRESERVE)
- {
- sym->symbol.section = section_from_elf_index (abfd,
- i_sym.st_shndx);
- if (sym->symbol.section == NULL)
- {
- /* This symbol is in a section for which we did not
- create a BFD section. Just use bfd_abs_section,
- although it is wrong. FIXME. */
- sym->symbol.section = bfd_abs_section_ptr;
- }
- }
- else if (i_sym.st_shndx == SHN_ABS)
+ else if (isym->st_shndx == SHN_ABS)
{
sym->symbol.section = bfd_abs_section_ptr;
}
- else if (i_sym.st_shndx == SHN_COMMON)
+ else if (isym->st_shndx == SHN_COMMON)
{
sym->symbol.section = bfd_com_section_ptr;
+ if ((abfd->flags & BFD_PLUGIN) != 0)
+ {
+ asection *xc = bfd_get_section_by_name (abfd, "COMMON");
+
+ if (xc == NULL)
+ {
+ flagword flags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP
+ | SEC_EXCLUDE);
+ xc = bfd_make_section_with_flags (abfd, "COMMON", flags);
+ if (xc == NULL)
+ goto error_return;
+ }
+ sym->symbol.section = xc;
+ }
/* Elf puts the alignment into the `value' field, and
the size into the `size' field. BFD wants to see the
size in the value field, and doesn't care (at the
moment) about the alignment. */
- sym->symbol.value = i_sym.st_size;
+ sym->symbol.value = isym->st_size;
}
else
- sym->symbol.section = bfd_abs_section_ptr;
+ {
+ sym->symbol.section
+ = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ if (sym->symbol.section == NULL)
+ {
+ /* This symbol is in a section for which we did not
+ create a BFD section. Just use bfd_abs_section,
+ although it is wrong. FIXME. */
+ sym->symbol.section = bfd_abs_section_ptr;
+ }
+ }
- /* If this is a relocateable file, then the symbol value is
- already section relative. */
+ /* If this is a relocatable file, then the symbol value is
+ already section relative. */
if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
sym->symbol.value -= sym->symbol.section->vma;
- switch (ELF_ST_BIND (i_sym.st_info))
+ switch (ELF_ST_BIND (isym->st_info))
{
case STB_LOCAL:
sym->symbol.flags |= BSF_LOCAL;
break;
case STB_GLOBAL:
- if (i_sym.st_shndx != SHN_UNDEF
- && i_sym.st_shndx != SHN_COMMON)
+ if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON)
sym->symbol.flags |= BSF_GLOBAL;
break;
case STB_WEAK:
sym->symbol.flags |= BSF_WEAK;
break;
+ case STB_GNU_UNIQUE:
+ sym->symbol.flags |= BSF_GNU_UNIQUE;
+ break;
}
- switch (ELF_ST_TYPE (i_sym.st_info))
+ switch (ELF_ST_TYPE (isym->st_info))
{
case STT_SECTION:
sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
case STT_FUNC:
sym->symbol.flags |= BSF_FUNCTION;
break;
+ case STT_COMMON:
+ /* FIXME: Do we have to put the size field into the value field
+ as we do with symbols in SHN_COMMON sections (see above) ? */
+ /* Fall through. */
case STT_OBJECT:
sym->symbol.flags |= BSF_OBJECT;
break;
+ case STT_TLS:
+ sym->symbol.flags |= BSF_THREAD_LOCAL;
+ break;
+ case STT_RELC:
+ sym->symbol.flags |= BSF_RELC;
+ break;
+ case STT_SRELC:
+ sym->symbol.flags |= BSF_SRELC;
+ break;
+ case STT_GNU_IFUNC:
+ sym->symbol.flags |= BSF_GNU_INDIRECT_FUNCTION;
+ break;
}
if (dynamic)
sym->symbol.flags |= BSF_DYNAMIC;
- if (x_versymp != NULL)
+ if (xver != NULL)
{
Elf_Internal_Versym iversym;
- _bfd_elf_swap_versym_in (abfd, x_versymp + i, &iversym);
+ _bfd_elf_swap_versym_in (abfd, xver, &iversym);
sym->version = iversym.vs_vers;
+ xver++;
}
/* Do some backend-specific processing on this symbol. */
- {
- struct elf_backend_data *ebd = get_elf_backend_data (abfd);
- if (ebd->elf_backend_symbol_processing)
- (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
- }
-
- sym++;
+ if (ebd->elf_backend_symbol_processing)
+ (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
}
}
/* Do some backend-specific processing on this symbol table. */
- {
- struct elf_backend_data *ebd = get_elf_backend_data (abfd);
- if (ebd->elf_backend_symbol_table_processing)
- (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount);
- }
+ if (ebd->elf_backend_symbol_table_processing)
+ (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount);
/* We rely on the zalloc to clear out the final symbol entry. */
*symptrs = 0; /* Final null pointer */
}
- if (x_shndx != NULL)
- free (x_shndx);
- if (x_versymp != NULL)
- free (x_versymp);
- if (x_symp != NULL)
- free (x_symp);
+ if (xverbuf != NULL)
+ free (xverbuf);
+ if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf)
+ free (isymbuf);
return symcount;
error_return:
- if (x_shndx != NULL)
- free (x_shndx);
- if (x_versymp != NULL)
- free (x_versymp);
- if (x_symp != NULL)
- free (x_symp);
+ if (xverbuf != NULL)
+ free (xverbuf);
+ if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf)
+ free (isymbuf);
return -1;
}
-/* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of
+/* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of
them. */
-static boolean
-elf_slurp_reloc_table_from_section (abfd, asect, rel_hdr, reloc_count,
- relents, symbols, dynamic)
- bfd *abfd;
- asection *asect;
- Elf_Internal_Shdr *rel_hdr;
- bfd_size_type reloc_count;
- arelent *relents;
- asymbol **symbols;
- boolean dynamic;
+static bfd_boolean
+elf_slurp_reloc_table_from_section (bfd *abfd,
+ asection *asect,
+ Elf_Internal_Shdr *rel_hdr,
+ bfd_size_type reloc_count,
+ arelent *relents,
+ asymbol **symbols,
+ bfd_boolean dynamic)
{
- struct elf_backend_data * const ebd = get_elf_backend_data (abfd);
- PTR allocated = NULL;
+ const struct elf_backend_data * const ebd = get_elf_backend_data (abfd);
+ void *allocated = NULL;
bfd_byte *native_relocs;
arelent *relent;
unsigned int i;
int entsize;
+ unsigned int symcount;
- allocated = (PTR) bfd_malloc (rel_hdr->sh_size);
+ allocated = bfd_malloc (rel_hdr->sh_size);
if (allocated == NULL)
goto error_return;
BFD_ASSERT (entsize == sizeof (Elf_External_Rel)
|| entsize == sizeof (Elf_External_Rela));
+ if (dynamic)
+ symcount = bfd_get_dynamic_symcount (abfd);
+ else
+ symcount = bfd_get_symcount (abfd);
+
for (i = 0, relent = relents;
i < reloc_count;
i++, relent++, native_relocs += entsize)
{
Elf_Internal_Rela rela;
- Elf_Internal_Rel rel;
if (entsize == sizeof (Elf_External_Rela))
- elf_swap_reloca_in (abfd, (Elf_External_Rela *) native_relocs, &rela);
+ elf_swap_reloca_in (abfd, native_relocs, &rela);
else
- {
- elf_swap_reloc_in (abfd, (Elf_External_Rel *) native_relocs, &rel);
- rela.r_offset = rel.r_offset;
- rela.r_info = rel.r_info;
- rela.r_addend = 0;
- }
+ elf_swap_reloc_in (abfd, native_relocs, &rela);
/* The address of an ELF reloc is section relative for an object
file, and absolute for an executable file or shared library.
else
relent->address = rela.r_offset - asect->vma;
- if (ELF_R_SYM (rela.r_info) == 0)
+ if (ELF_R_SYM (rela.r_info) == STN_UNDEF)
relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+ else if (ELF_R_SYM (rela.r_info) > symcount)
+ {
+ (*_bfd_error_handler)
+ (_("%s(%s): relocation %d has invalid symbol index %ld"),
+ abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info));
+ relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+ }
else
{
- asymbol **ps, *s;
+ asymbol **ps;
ps = symbols + ELF_R_SYM (rela.r_info) - 1;
- s = *ps;
- /* Canonicalize ELF section symbols. FIXME: Why? */
- if ((s->flags & BSF_SECTION_SYM) == 0)
- relent->sym_ptr_ptr = ps;
- else
- relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
+ relent->sym_ptr_ptr = ps;
}
relent->addend = rela.r_addend;
- if (entsize == sizeof (Elf_External_Rela))
+ if ((entsize == sizeof (Elf_External_Rela)
+ && ebd->elf_info_to_howto != NULL)
+ || ebd->elf_info_to_howto_rel == NULL)
(*ebd->elf_info_to_howto) (abfd, relent, &rela);
else
- (*ebd->elf_info_to_howto_rel) (abfd, relent, &rel);
+ (*ebd->elf_info_to_howto_rel) (abfd, relent, &rela);
}
if (allocated != NULL)
free (allocated);
- return true;
+ return TRUE;
error_return:
if (allocated != NULL)
free (allocated);
- return false;
+ return FALSE;
}
/* Read in and swap the external relocs. */
-boolean
-elf_slurp_reloc_table (abfd, asect, symbols, dynamic)
- bfd *abfd;
- asection *asect;
- asymbol **symbols;
- boolean dynamic;
+bfd_boolean
+elf_slurp_reloc_table (bfd *abfd,
+ asection *asect,
+ asymbol **symbols,
+ bfd_boolean dynamic)
{
struct bfd_elf_section_data * const d = elf_section_data (asect);
Elf_Internal_Shdr *rel_hdr;
bfd_size_type amt;
if (asect->relocation != NULL)
- return true;
+ return TRUE;
if (! dynamic)
{
if ((asect->flags & SEC_RELOC) == 0
|| asect->reloc_count == 0)
- return true;
+ return TRUE;
- rel_hdr = &d->rel_hdr;
- reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
- rel_hdr2 = d->rel_hdr2;
- reloc_count2 = (rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0);
+ rel_hdr = d->rel.hdr;
+ reloc_count = rel_hdr ? NUM_SHDR_ENTRIES (rel_hdr) : 0;
+ rel_hdr2 = d->rela.hdr;
+ reloc_count2 = rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0;
BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2);
- BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset
+ BFD_ASSERT ((rel_hdr && asect->rel_filepos == rel_hdr->sh_offset)
|| (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));
}
case because relocations against this section may use the
dynamic symbol table, and in that case bfd_section_from_shdr
in elf.c does not update the RELOC_COUNT. */
- if (asect->_raw_size == 0)
- return true;
+ if (asect->size == 0)
+ return TRUE;
rel_hdr = &d->this_hdr;
reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
amt = (reloc_count + reloc_count2) * sizeof (arelent);
relents = (arelent *) bfd_alloc (abfd, amt);
if (relents == NULL)
- return false;
+ return FALSE;
- if (!elf_slurp_reloc_table_from_section (abfd, asect,
- rel_hdr, reloc_count,
- relents,
- symbols, dynamic))
- return false;
+ if (rel_hdr
+ && !elf_slurp_reloc_table_from_section (abfd, asect,
+ rel_hdr, reloc_count,
+ relents,
+ symbols, dynamic))
+ return FALSE;
if (rel_hdr2
&& !elf_slurp_reloc_table_from_section (abfd, asect,
rel_hdr2, reloc_count2,
relents + reloc_count,
symbols, dynamic))
- return false;
+ return FALSE;
asect->relocation = relents;
- return true;
+ return TRUE;
}
-#ifdef DEBUG
+#if DEBUG & 2
static void
-elf_debug_section (num, hdr)
- int num;
- Elf_Internal_Shdr *hdr;
+elf_debug_section (int num, Elf_Internal_Shdr *hdr)
{
fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num,
hdr->bfd_section != NULL ? hdr->bfd_section->name : "",
(long) hdr->sh_entsize);
fflush (stderr);
}
+#endif
+#if DEBUG & 1
static void
-elf_debug_file (ehdrp)
- Elf_Internal_Ehdr *ehdrp;
+elf_debug_file (Elf_Internal_Ehdr *ehdrp)
{
fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry);
fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff);
fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum);
fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize);
}
-
-static char *
-elf_symbol_flags (flags)
- flagword flags;
+#endif
+\f
+/* Create a new BFD as if by bfd_openr. Rather than opening a file,
+ reconstruct an ELF file by reading the segments out of remote memory
+ based on the ELF file header at EHDR_VMA and the ELF program headers it
+ points to. If not null, *LOADBASEP is filled in with the difference
+ between the VMAs from which the segments were read, and the VMAs the
+ file headers (and hence BFD's idea of each section's VMA) put them at.
+
+ The function TARGET_READ_MEMORY is called to copy LEN bytes from the
+ remote memory at target address VMA into the local buffer at MYADDR; it
+ should return zero on success or an `errno' code on failure. TEMPL must
+ be a BFD for a target with the word size and byte order found in the
+ remote memory. */
+
+bfd *
+NAME(_bfd_elf,bfd_from_remote_memory)
+ (bfd *templ,
+ bfd_vma ehdr_vma,
+ bfd_vma *loadbasep,
+ int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type))
{
- static char buffer[1024];
+ Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
+ Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */
+ Elf_External_Phdr *x_phdrs;
+ Elf_Internal_Phdr *i_phdrs, *last_phdr;
+ bfd *nbfd;
+ struct bfd_in_memory *bim;
+ int contents_size;
+ bfd_byte *contents;
+ int err;
+ unsigned int i;
+ bfd_vma loadbase;
+ bfd_boolean loadbase_set;
+
+ /* Read in the ELF header in external format. */
+ err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr);
+ if (err)
+ {
+ bfd_set_error (bfd_error_system_call);
+ errno = err;
+ return NULL;
+ }
+
+ /* Now check to see if we have a valid ELF file, and one that BFD can
+ make use of. The magic number must match, the address size ('class')
+ and byte-swapping must match our XVEC entry. */
+
+ if (! elf_file_p (&x_ehdr)
+ || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT
+ || x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
+ {
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
- buffer[0] = '\0';
- if (flags & BSF_LOCAL)
- strcat (buffer, " local");
+ /* Check that file's byte order matches xvec's */
+ switch (x_ehdr.e_ident[EI_DATA])
+ {
+ case ELFDATA2MSB: /* Big-endian */
+ if (! bfd_header_big_endian (templ))
+ {
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
+ break;
+ case ELFDATA2LSB: /* Little-endian */
+ if (! bfd_header_little_endian (templ))
+ {
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
+ break;
+ case ELFDATANONE: /* No data encoding specified */
+ default: /* Unknown data encoding specified */
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
- if (flags & BSF_GLOBAL)
- strcat (buffer, " global");
+ elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr);
- if (flags & BSF_DEBUGGING)
- strcat (buffer, " debug");
+ /* The file header tells where to find the program headers.
+ These are what we use to actually choose what to read. */
- if (flags & BSF_FUNCTION)
- strcat (buffer, " function");
+ if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0)
+ {
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
- if (flags & BSF_KEEP)
- strcat (buffer, " keep");
+ x_phdrs = (Elf_External_Phdr *)
+ bfd_malloc (i_ehdr.e_phnum * (sizeof *x_phdrs + sizeof *i_phdrs));
+ if (x_phdrs == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+ err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs,
+ i_ehdr.e_phnum * sizeof x_phdrs[0]);
+ if (err)
+ {
+ free (x_phdrs);
+ bfd_set_error (bfd_error_system_call);
+ errno = err;
+ return NULL;
+ }
+ i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum];
- if (flags & BSF_KEEP_G)
- strcat (buffer, " keep_g");
+ contents_size = 0;
+ last_phdr = NULL;
+ loadbase = ehdr_vma;
+ loadbase_set = FALSE;
+ for (i = 0; i < i_ehdr.e_phnum; ++i)
+ {
+ elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]);
+ if (i_phdrs[i].p_type == PT_LOAD)
+ {
+ bfd_vma segment_end;
+ segment_end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz
+ + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align;
+ if (segment_end > (bfd_vma) contents_size)
+ contents_size = segment_end;
+
+ /* LOADADDR is the `Base address' from the gELF specification:
+ `lowest p_vaddr value for a PT_LOAD segment' is P_VADDR from the
+ first PT_LOAD as PT_LOADs are ordered by P_VADDR. */
+ if (!loadbase_set && (i_phdrs[i].p_offset & -i_phdrs[i].p_align) == 0)
+ {
+ loadbase = ehdr_vma - (i_phdrs[i].p_vaddr & -i_phdrs[i].p_align);
+ loadbase_set = TRUE;
+ }
- if (flags & BSF_WEAK)
- strcat (buffer, " weak");
+ last_phdr = &i_phdrs[i];
+ }
+ }
+ if (last_phdr == NULL)
+ {
+ /* There were no PT_LOAD segments, so we don't have anything to read. */
+ free (x_phdrs);
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
- if (flags & BSF_SECTION_SYM)
- strcat (buffer, " section-sym");
+ /* Trim the last segment so we don't bother with zeros in the last page
+ that are off the end of the file. However, if the extra bit in that
+ page includes the section headers, keep them. */
+ if ((bfd_vma) contents_size > last_phdr->p_offset + last_phdr->p_filesz
+ && (bfd_vma) contents_size >= (i_ehdr.e_shoff
+ + i_ehdr.e_shnum * i_ehdr.e_shentsize))
+ {
+ contents_size = last_phdr->p_offset + last_phdr->p_filesz;
+ if ((bfd_vma) contents_size < (i_ehdr.e_shoff
+ + i_ehdr.e_shnum * i_ehdr.e_shentsize))
+ contents_size = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize;
+ }
+ else
+ contents_size = last_phdr->p_offset + last_phdr->p_filesz;
- if (flags & BSF_OLD_COMMON)
- strcat (buffer, " old-common");
+ /* Now we know the size of the whole image we want read in. */
+ contents = (bfd_byte *) bfd_zmalloc (contents_size);
+ if (contents == NULL)
+ {
+ free (x_phdrs);
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
- if (flags & BSF_NOT_AT_END)
- strcat (buffer, " not-at-end");
+ for (i = 0; i < i_ehdr.e_phnum; ++i)
+ if (i_phdrs[i].p_type == PT_LOAD)
+ {
+ bfd_vma start = i_phdrs[i].p_offset & -i_phdrs[i].p_align;
+ bfd_vma end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz
+ + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align;
+ if (end > (bfd_vma) contents_size)
+ end = contents_size;
+ err = target_read_memory ((loadbase + i_phdrs[i].p_vaddr)
+ & -i_phdrs[i].p_align,
+ contents + start, end - start);
+ if (err)
+ {
+ free (x_phdrs);
+ free (contents);
+ bfd_set_error (bfd_error_system_call);
+ errno = err;
+ return NULL;
+ }
+ }
+ free (x_phdrs);
- if (flags & BSF_CONSTRUCTOR)
- strcat (buffer, " constructor");
+ /* If the segments visible in memory didn't include the section headers,
+ then clear them from the file header. */
+ if ((bfd_vma) contents_size < (i_ehdr.e_shoff
+ + i_ehdr.e_shnum * i_ehdr.e_shentsize))
+ {
+ memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff);
+ memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum);
+ memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx);
+ }
- if (flags & BSF_WARNING)
- strcat (buffer, " warning");
+ /* This will normally have been in the first PT_LOAD segment. But it
+ conceivably could be missing, and we might have just changed it. */
+ memcpy (contents, &x_ehdr, sizeof x_ehdr);
- if (flags & BSF_INDIRECT)
- strcat (buffer, " indirect");
+ /* Now we have a memory image of the ELF file contents. Make a BFD. */
+ bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory));
+ if (bim == NULL)
+ {
+ free (contents);
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+ nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
+ {
+ free (bim);
+ free (contents);
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+ nbfd->filename = "<in-memory>";
+ nbfd->xvec = templ->xvec;
+ bim->size = contents_size;
+ bim->buffer = contents;
+ nbfd->iostream = bim;
+ nbfd->flags = BFD_IN_MEMORY;
+ nbfd->iovec = &_bfd_memory_iovec;
+ nbfd->origin = 0;
+ nbfd->direction = read_direction;
+ nbfd->mtime = time (NULL);
+ nbfd->mtime_set = TRUE;
+
+ if (loadbasep)
+ *loadbasep = loadbase;
+ return nbfd;
+}
- if (flags & BSF_FILE)
- strcat (buffer, " file");
+/* Function for ELF_R_INFO. */
- if (flags & DYNAMIC)
- strcat (buffer, " dynamic");
+bfd_vma
+NAME(elf,r_info) (bfd_vma sym, bfd_vma type)
+{
+ return ELF_R_INFO (sym, type);
+}
- if (flags & ~(BSF_LOCAL
- | BSF_GLOBAL
- | BSF_DEBUGGING
- | BSF_FUNCTION
- | BSF_KEEP
- | BSF_KEEP_G
- | BSF_WEAK
- | BSF_SECTION_SYM
- | BSF_OLD_COMMON
- | BSF_NOT_AT_END
- | BSF_CONSTRUCTOR
- | BSF_WARNING
- | BSF_INDIRECT
- | BSF_FILE
- | BSF_DYNAMIC))
- strcat (buffer, " unknown-bits");
+/* Function for ELF_R_SYM. */
- return buffer;
+bfd_vma
+NAME(elf,r_sym) (bfd_vma r_info)
+{
+ return ELF_R_SYM (r_info);
}
-#endif
\f
#include "elfcore.h"
-#include "elflink.h"
\f
/* Size-dependent data and functions. */
const struct elf_size_info NAME(_bfd_elf,size_info) = {
sizeof (Elf_External_Note),
4,
1,
- ARCH_SIZE, FILE_ALIGN,
+ ARCH_SIZE, LOG_FILE_ALIGN,
ELFCLASS, EV_CURRENT,
elf_write_out_phdrs,
elf_write_shdrs_and_ehdr,
+ elf_checksum_contents,
elf_write_relocs,
elf_swap_symbol_in,
elf_swap_symbol_out,
elf_slurp_symbol_table,
elf_swap_dyn_in,
elf_swap_dyn_out,
- NULL,
- NULL,
- NULL,
- NULL
+ elf_swap_reloc_in,
+ elf_swap_reloc_out,
+ elf_swap_reloca_in,
+ elf_swap_reloca_out
};
projects / external / binutils.git / blobdiff