From 25dbc73a85fbe15b7d76202c07ec6a5d896a6b92 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Wed, 16 Mar 2005 06:11:51 +0000 Subject: [PATCH] * elf32-ppc.c: Divide file into general and linker specific functions. Sort linker functions into roughly the order in which they are called by the ELF linker code. --- bfd/ChangeLog | 6 + bfd/elf32-ppc.c | 6289 ++++++++++++++++++++++++++++--------------------------- 2 files changed, 3152 insertions(+), 3143 deletions(-) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 51592c9..24d8c9f 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,11 @@ 2005-03-16 Alan Modra + * elf32-ppc.c: Divide file into general and linker specific + functions. Sort linker functions into roughly the order in which + they are called by the ELF linker code. + +2005-03-16 Alan Modra + * elf32-ppc.c (ppc_elf_create_linker_section): Set SEC_LINKER_CREATED on section. Correct comment, and add FIXME. (ppc_elf_additional_program_headers): Don't bump header count for diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c index 0866e46..5b32f14 100644 --- a/bfd/elf32-ppc.c +++ b/bfd/elf32-ppc.c @@ -68,280 +68,6 @@ static bfd_reloc_status_type ppc_elf_unhandled_reloc /* Offset of tp and dtp pointers from start of TLS block. */ #define TP_OFFSET 0x7000 #define DTP_OFFSET 0x8000 - - -/* Enumeration to specify the special section. */ -enum elf_linker_section_enum -{ - LINKER_SECTION_SDATA, - LINKER_SECTION_SDATA2 -}; - -/* Sections created by the linker. */ - -typedef struct elf_linker_section -{ - /* pointer to the section */ - asection *section; - /* pointer to the relocations needed for this section */ - asection *rel_section; - /* pointer to the created symbol hash value */ - struct elf_link_hash_entry *sym_hash; - /* offset of symbol from beginning of section */ - bfd_vma sym_offset; -} elf_linker_section_t; - -/* Linked list of allocated pointer entries. This hangs off of the - symbol lists, and provides allows us to return different pointers, - based on different addend's. */ - -typedef struct elf_linker_section_pointers -{ - /* next allocated pointer for this symbol */ - struct elf_linker_section_pointers *next; - /* offset of pointer from beginning of section */ - bfd_vma offset; - /* addend used */ - bfd_vma addend; - /* which linker section this is */ - elf_linker_section_t *lsect; - /* whether address was written yet */ - bfd_boolean written_address_p; -} elf_linker_section_pointers_t; - -struct ppc_elf_obj_tdata -{ - struct elf_obj_tdata elf; - - /* A mapping from local symbols to offsets into the various linker - sections added. This is index by the symbol index. */ - elf_linker_section_pointers_t **linker_section_pointers; -}; - -#define ppc_elf_tdata(bfd) \ - ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) - -#define elf_local_ptr_offsets(bfd) \ - (ppc_elf_tdata (bfd)->linker_section_pointers) - -/* Override the generic function because we store some extras. */ - -static bfd_boolean -ppc_elf_mkobject (bfd *abfd) -{ - bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata); - abfd->tdata.any = bfd_zalloc (abfd, amt); - if (abfd->tdata.any == NULL) - return FALSE; - return TRUE; -} - -/* The PPC linker needs to keep track of the number of relocs that it - decides to copy as dynamic relocs in check_relocs for each symbol. - This is so that it can later discard them if they are found to be - unnecessary. We store the information in a field extending the - regular ELF linker hash table. */ - -struct ppc_elf_dyn_relocs -{ - struct ppc_elf_dyn_relocs *next; - - /* The input section of the reloc. */ - asection *sec; - - /* Total number of relocs copied for the input section. */ - bfd_size_type count; - - /* Number of pc-relative relocs copied for the input section. */ - bfd_size_type pc_count; -}; - -/* PPC ELF linker hash entry. */ - -struct ppc_elf_link_hash_entry -{ - struct elf_link_hash_entry elf; - - /* If this symbol is used in the linker created sections, the processor - specific backend uses this field to map the field into the offset - from the beginning of the section. */ - elf_linker_section_pointers_t *linker_section_pointer; - - /* Track dynamic relocs copied for this symbol. */ - struct ppc_elf_dyn_relocs *dyn_relocs; - - /* Contexts in which symbol is used in the GOT (or TOC). - TLS_GD .. TLS_TLS bits are or'd into the mask as the - corresponding relocs are encountered during check_relocs. - tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to - indicate the corresponding GOT entry type is not needed. */ -#define TLS_GD 1 /* GD reloc. */ -#define TLS_LD 2 /* LD reloc. */ -#define TLS_TPREL 4 /* TPREL reloc, => IE. */ -#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ -#define TLS_TLS 16 /* Any TLS reloc. */ -#define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ - char tls_mask; -}; - -#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) - -/* PPC ELF linker hash table. */ - -struct ppc_elf_link_hash_table -{ - struct elf_link_hash_table elf; - - /* Short-cuts to get to dynamic linker sections. */ - asection *got; - asection *relgot; - asection *plt; - asection *relplt; - asection *dynbss; - asection *relbss; - asection *dynsbss; - asection *relsbss; - elf_linker_section_t *sdata; - elf_linker_section_t *sdata2; - asection *sbss; - - /* Shortcut to .__tls_get_addr. */ - struct elf_link_hash_entry *tls_get_addr; - - /* TLS local dynamic got entry handling. */ - union { - bfd_signed_vma refcount; - bfd_vma offset; - } tlsld_got; - - /* Small local sym to section mapping cache. */ - struct sym_sec_cache sym_sec; -}; - -/* Get the PPC ELF linker hash table from a link_info structure. */ - -#define ppc_elf_hash_table(p) \ - ((struct ppc_elf_link_hash_table *) (p)->hash) - -/* Create an entry in a PPC ELF linker hash table. */ - -static struct bfd_hash_entry * -ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, - struct bfd_hash_table *table, - const char *string) -{ - /* Allocate the structure if it has not already been allocated by a - subclass. */ - if (entry == NULL) - { - entry = bfd_hash_allocate (table, - sizeof (struct ppc_elf_link_hash_entry)); - if (entry == NULL) - return entry; - } - - /* Call the allocation method of the superclass. */ - entry = _bfd_elf_link_hash_newfunc (entry, table, string); - if (entry != NULL) - { - ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; - ppc_elf_hash_entry (entry)->dyn_relocs = NULL; - ppc_elf_hash_entry (entry)->tls_mask = 0; - } - - return entry; -} - -/* Create a PPC ELF linker hash table. */ - -static struct bfd_link_hash_table * -ppc_elf_link_hash_table_create (bfd *abfd) -{ - struct ppc_elf_link_hash_table *ret; - - ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); - if (ret == NULL) - return NULL; - - if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, - ppc_elf_link_hash_newfunc)) - { - free (ret); - return NULL; - } - - return &ret->elf.root; -} - -/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid - copying dynamic variables from a shared lib into an app's dynbss - section, and instead use a dynamic relocation to point into the - shared lib. */ -#define ELIMINATE_COPY_RELOCS 1 - -/* Copy the extra info we tack onto an elf_link_hash_entry. */ - -static void -ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed, - struct elf_link_hash_entry *dir, - struct elf_link_hash_entry *ind) -{ - struct ppc_elf_link_hash_entry *edir, *eind; - - edir = (struct ppc_elf_link_hash_entry *) dir; - eind = (struct ppc_elf_link_hash_entry *) ind; - - if (eind->dyn_relocs != NULL) - { - if (edir->dyn_relocs != NULL) - { - struct ppc_elf_dyn_relocs **pp; - struct ppc_elf_dyn_relocs *p; - - if (ind->root.type == bfd_link_hash_indirect) - abort (); - - /* Add reloc counts against the weak sym to the strong sym - list. Merge any entries against the same section. */ - for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) - { - struct ppc_elf_dyn_relocs *q; - - for (q = edir->dyn_relocs; q != NULL; q = q->next) - if (q->sec == p->sec) - { - q->pc_count += p->pc_count; - q->count += p->count; - *pp = p->next; - break; - } - if (q == NULL) - pp = &p->next; - } - *pp = edir->dyn_relocs; - } - - edir->dyn_relocs = eind->dyn_relocs; - eind->dyn_relocs = NULL; - } - - edir->tls_mask |= eind->tls_mask; - - if (ELIMINATE_COPY_RELOCS - && ind->root.type != bfd_link_hash_indirect - && dir->dynamic_adjusted) - { - /* If called to transfer flags for a weakdef during processing - of elf_adjust_dynamic_symbol, don't copy non_got_ref. - We clear it ourselves for ELIMINATE_COPY_RELOCS. */ - dir->ref_dynamic |= ind->ref_dynamic; - dir->ref_regular |= ind->ref_regular; - dir->ref_regular_nonweak |= ind->ref_regular_nonweak; - dir->needs_plt |= ind->needs_plt; - } - else - _bfd_elf_link_hash_copy_indirect (bed, dir, ind); -} static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; @@ -1435,1161 +1161,1317 @@ static reloc_howto_type ppc_elf_howto_raw[] = { FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ - ppc_elf_addr16_ha_reloc, /* special_function */ - "R_PPC_EMB_NADDR16_HA", /* name */ + ppc_elf_addr16_ha_reloc, /* special_function */ + "R_PPC_EMB_NADDR16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16 bit value resulting from allocating a 4 byte word to hold an + address in the .sdata section, and returning the offset from + _SDA_BASE_ for that relocation. */ + HOWTO (R_PPC_EMB_SDAI16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_EMB_SDAI16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16 bit value resulting from allocating a 4 byte word to hold an + address in the .sdata2 section, and returning the offset from + _SDA2_BASE_ for that relocation. */ + HOWTO (R_PPC_EMB_SDA2I16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_EMB_SDA2I16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with + small data items. */ + HOWTO (R_PPC_EMB_SDA2REL, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_EMB_SDA2REL", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit + signed offset from the appropriate base, and filling in the register + field with the appropriate register (0, 2, or 13). */ + HOWTO (R_PPC_EMB_SDA21, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_EMB_SDA21", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Relocation not handled: R_PPC_EMB_MRKREF */ + /* Relocation not handled: R_PPC_EMB_RELSEC16 */ + /* Relocation not handled: R_PPC_EMB_RELST_LO */ + /* Relocation not handled: R_PPC_EMB_RELST_HI */ + /* Relocation not handled: R_PPC_EMB_RELST_HA */ + /* Relocation not handled: R_PPC_EMB_BIT_FLD */ + + /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling + in the 16 bit signed offset from the appropriate base, and filling in the + register field with the appropriate register (0, 2, or 13). */ + HOWTO (R_PPC_EMB_RELSDA, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_EMB_RELSDA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable hierarchy. */ + HOWTO (R_PPC_GNU_VTINHERIT, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_PPC_GNU_VTINHERIT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable member usage. */ + HOWTO (R_PPC_GNU_VTENTRY, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_PPC_GNU_VTENTRY", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ - 0xffff, /* dst_mask */ + 0, /* dst_mask */ FALSE), /* pcrel_offset */ - /* 16 bit value resulting from allocating a 4 byte word to hold an - address in the .sdata section, and returning the offset from - _SDA_BASE_ for that relocation. */ - HOWTO (R_PPC_EMB_SDAI16, /* type */ + /* Phony reloc to handle AIX style TOC entries. */ + HOWTO (R_PPC_TOC16, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ + complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ - "R_PPC_EMB_SDAI16", /* name */ + "R_PPC_TOC16", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xffff, /* dst_mask */ FALSE), /* pcrel_offset */ +}; + +/* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ + +static void +ppc_elf_howto_init (void) +{ + unsigned int i, type; + + for (i = 0; + i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); + i++) + { + type = ppc_elf_howto_raw[i].type; + if (type >= (sizeof (ppc_elf_howto_table) + / sizeof (ppc_elf_howto_table[0]))) + abort (); + ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; + } +} + +static reloc_howto_type * +ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + enum elf_ppc_reloc_type r; + + /* Initialize howto table if not already done. */ + if (!ppc_elf_howto_table[R_PPC_ADDR32]) + ppc_elf_howto_init (); + + switch (code) + { + default: + return NULL; + + case BFD_RELOC_NONE: r = R_PPC_NONE; break; + case BFD_RELOC_32: r = R_PPC_ADDR32; break; + case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; + case BFD_RELOC_16: r = R_PPC_ADDR16; break; + case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; + case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; + case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; + case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; + case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; + case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; + case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; + case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; + case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; + case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; + case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; + case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; + case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; + case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; + case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; + case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; + case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; + case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; + case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; + case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; + case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; + case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; + case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; + case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; + case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; + case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; + case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; + case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; + case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; + case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; + case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; + case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; + case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; + case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; + case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; + case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; + case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; + case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; + case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; + case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; + case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; + case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; + case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; + case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; + case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; + case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; + case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; + case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; + case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; + case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; + case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; + case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; + case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; + case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; + case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; + case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; + case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; + case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; + case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; + case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; + case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; + case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; + case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; + case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; + case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; + case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; + case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; + case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; + case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; + case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; + case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; + case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; + case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; + case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; + case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; + case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; + case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; + } + + return ppc_elf_howto_table[r]; +}; + +/* Set the howto pointer for a PowerPC ELF reloc. */ + +static void +ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, + arelent *cache_ptr, + Elf_Internal_Rela *dst) +{ + /* Initialize howto table if not already done. */ + if (!ppc_elf_howto_table[R_PPC_ADDR32]) + ppc_elf_howto_init (); + + BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); + cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; +} + +/* Handle the R_PPC_ADDR16_HA reloc. */ + +static bfd_reloc_status_type +ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, + arelent *reloc_entry, + asymbol *symbol, + void *data ATTRIBUTE_UNUSED, + asection *input_section, + bfd *output_bfd, + char **error_message ATTRIBUTE_UNUSED) +{ + bfd_vma relocation; + + if (output_bfd != NULL) + { + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; + } + + if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) + return bfd_reloc_outofrange; + + if (bfd_is_com_section (symbol->section)) + relocation = 0; + else + relocation = symbol->value; + + relocation += symbol->section->output_section->vma; + relocation += symbol->section->output_offset; + relocation += reloc_entry->addend; + + reloc_entry->addend += (relocation & 0x8000) << 1; + + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc_elf_unhandled_reloc (bfd *abfd, + arelent *reloc_entry, + asymbol *symbol, + void *data, + asection *input_section, + bfd *output_bfd, + char **error_message) +{ + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + if (error_message != NULL) + { + static char buf[60]; + sprintf (buf, _("generic linker can't handle %s"), + reloc_entry->howto->name); + *error_message = buf; + } + return bfd_reloc_dangerous; +} + +/* Sections created by the linker. */ + +typedef struct elf_linker_section +{ + /* pointer to the section */ + asection *section; + /* pointer to the relocations needed for this section */ + asection *rel_section; + /* pointer to the created symbol hash value */ + struct elf_link_hash_entry *sym_hash; + /* offset of symbol from beginning of section */ + bfd_vma sym_offset; +} elf_linker_section_t; + +/* Linked list of allocated pointer entries. This hangs off of the + symbol lists, and provides allows us to return different pointers, + based on different addend's. */ + +typedef struct elf_linker_section_pointers +{ + /* next allocated pointer for this symbol */ + struct elf_linker_section_pointers *next; + /* offset of pointer from beginning of section */ + bfd_vma offset; + /* addend used */ + bfd_vma addend; + /* which linker section this is */ + elf_linker_section_t *lsect; + /* whether address was written yet */ + bfd_boolean written_address_p; +} elf_linker_section_pointers_t; + +struct ppc_elf_obj_tdata +{ + struct elf_obj_tdata elf; + + /* A mapping from local symbols to offsets into the various linker + sections added. This is index by the symbol index. */ + elf_linker_section_pointers_t **linker_section_pointers; +}; + +#define ppc_elf_tdata(bfd) \ + ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) - /* 16 bit value resulting from allocating a 4 byte word to hold an - address in the .sdata2 section, and returning the offset from - _SDA2_BASE_ for that relocation. */ - HOWTO (R_PPC_EMB_SDA2I16, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_PPC_EMB_SDA2I16", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ +#define elf_local_ptr_offsets(bfd) \ + (ppc_elf_tdata (bfd)->linker_section_pointers) - /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with - small data items. */ - HOWTO (R_PPC_EMB_SDA2REL, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_PPC_EMB_SDA2REL", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ +/* Override the generic function because we store some extras. */ - /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit - signed offset from the appropriate base, and filling in the register - field with the appropriate register (0, 2, or 13). */ - HOWTO (R_PPC_EMB_SDA21, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_PPC_EMB_SDA21", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ +static bfd_boolean +ppc_elf_mkobject (bfd *abfd) +{ + bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata); + abfd->tdata.any = bfd_zalloc (abfd, amt); + if (abfd->tdata.any == NULL) + return FALSE; + return TRUE; +} - /* Relocation not handled: R_PPC_EMB_MRKREF */ - /* Relocation not handled: R_PPC_EMB_RELSEC16 */ - /* Relocation not handled: R_PPC_EMB_RELST_LO */ - /* Relocation not handled: R_PPC_EMB_RELST_HI */ - /* Relocation not handled: R_PPC_EMB_RELST_HA */ - /* Relocation not handled: R_PPC_EMB_BIT_FLD */ +/* Fix bad default arch selected for a 32 bit input bfd when the + default is 64 bit. */ - /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling - in the 16 bit signed offset from the appropriate base, and filling in the - register field with the appropriate register (0, 2, or 13). */ - HOWTO (R_PPC_EMB_RELSDA, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_PPC_EMB_RELSDA", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ +static bfd_boolean +ppc_elf_object_p (bfd *abfd) +{ + if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) + { + Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); - /* GNU extension to record C++ vtable hierarchy. */ - HOWTO (R_PPC_GNU_VTINHERIT, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - NULL, /* special_function */ - "R_PPC_GNU_VTINHERIT", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - FALSE), /* pcrel_offset */ + if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) + { + /* Relies on arch after 64 bit default being 32 bit default. */ + abfd->arch_info = abfd->arch_info->next; + BFD_ASSERT (abfd->arch_info->bits_per_word == 32); + } + } + return TRUE; +} - /* GNU extension to record C++ vtable member usage. */ - HOWTO (R_PPC_GNU_VTENTRY, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - NULL, /* special_function */ - "R_PPC_GNU_VTENTRY", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - FALSE), /* pcrel_offset */ +/* Function to set whether a module needs the -mrelocatable bit set. */ - /* Phony reloc to handle AIX style TOC entries. */ - HOWTO (R_PPC_TOC16, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_PPC_TOC16", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ -}; - -/* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ +static bfd_boolean +ppc_elf_set_private_flags (bfd *abfd, flagword flags) +{ + BFD_ASSERT (!elf_flags_init (abfd) + || elf_elfheader (abfd)->e_flags == flags); -static void -ppc_elf_howto_init (void) + elf_elfheader (abfd)->e_flags = flags; + elf_flags_init (abfd) = TRUE; + return TRUE; +} + +/* Merge backend specific data from an object file to the output + object file when linking. */ + +static bfd_boolean +ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) { - unsigned int i, type; + flagword old_flags; + flagword new_flags; + bfd_boolean error; - for (i = 0; - i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); - i++) + /* Check if we have the same endianess. */ + if (! _bfd_generic_verify_endian_match (ibfd, obfd)) + return FALSE; + + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return TRUE; + + new_flags = elf_elfheader (ibfd)->e_flags; + old_flags = elf_elfheader (obfd)->e_flags; + if (!elf_flags_init (obfd)) { - type = ppc_elf_howto_raw[i].type; - if (type >= (sizeof (ppc_elf_howto_table) - / sizeof (ppc_elf_howto_table[0]))) - abort (); - ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; + /* First call, no flags set. */ + elf_flags_init (obfd) = TRUE; + elf_elfheader (obfd)->e_flags = new_flags; } -} - -#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) -static const int shared_stub_entry[] = - { - 0x7c0802a6, /* mflr 0 */ - 0x429f0005, /* bcl 20, 31, .Lxxx */ - 0x7d6802a6, /* mflr 11 */ - 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */ - 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */ - 0x7c0803a6, /* mtlr 0 */ - 0x7d6903a6, /* mtctr 11 */ - 0x4e800420, /* bctr */ - }; + /* Compatible flags are ok. */ + else if (new_flags == old_flags) + ; + + /* Incompatible flags. */ + else + { + /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib + to be linked with either. */ + error = FALSE; + if ((new_flags & EF_PPC_RELOCATABLE) != 0 + && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) + { + error = TRUE; + (*_bfd_error_handler) + (_("%B: compiled with -mrelocatable and linked with " + "modules compiled normally"), ibfd); + } + else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 + && (old_flags & EF_PPC_RELOCATABLE) != 0) + { + error = TRUE; + (*_bfd_error_handler) + (_("%B: compiled normally and linked with " + "modules compiled with -mrelocatable"), ibfd); + } + + /* The output is -mrelocatable-lib iff both the input files are. */ + if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) + elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; + + /* The output is -mrelocatable iff it can't be -mrelocatable-lib, + but each input file is either -mrelocatable or -mrelocatable-lib. */ + if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) + && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) + && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) + elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; + + /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if + any module uses it. */ + elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); + + new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); + old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); + + /* Warn about any other mismatches. */ + if (new_flags != old_flags) + { + error = TRUE; + (*_bfd_error_handler) + (_("%B: uses different e_flags (0x%lx) fields " + "than previous modules (0x%lx)"), + ibfd, (long) new_flags, (long) old_flags); + } -static const int stub_entry[] = - { - 0x3d600000, /* lis 11,xxx@ha */ - 0x396b0000, /* addi 11,11,xxx@l */ - 0x7d6903a6, /* mtctr 11 */ - 0x4e800420, /* bctr */ - }; + if (error) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + } + + return TRUE; +} +/* Support for core dump NOTE sections. */ static bfd_boolean -ppc_elf_relax_section (bfd *abfd, - asection *isec, - struct bfd_link_info *link_info, - bfd_boolean *again) +ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) { - struct one_fixup - { - struct one_fixup *next; - asection *tsec; - bfd_vma toff; - bfd_vma trampoff; - }; - - Elf_Internal_Shdr *symtab_hdr; - bfd_byte *contents = NULL; - Elf_Internal_Sym *isymbuf = NULL; - Elf_Internal_Rela *internal_relocs = NULL; - Elf_Internal_Rela *irel, *irelend; - struct one_fixup *fixups = NULL; - bfd_boolean changed; - struct ppc_elf_link_hash_table *ppc_info; - bfd_size_type trampoff; + int offset; + unsigned int size; - *again = FALSE; + switch (note->descsz) + { + default: + return FALSE; - /* Nothing to do if there are no relocations. */ - if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0) - return TRUE; + case 268: /* Linux/PPC. */ + /* pr_cursig */ + elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); - trampoff = (isec->size + 3) & (bfd_vma) -4; - /* Space for a branch around any trampolines. */ - trampoff += 4; + /* pr_pid */ + elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + /* pr_reg */ + offset = 72; + size = 192; - /* Get a copy of the native relocations. */ - internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, - link_info->keep_memory); - if (internal_relocs == NULL) - goto error_return; + break; + } - ppc_info = ppc_elf_hash_table (link_info); - irelend = internal_relocs + isec->reloc_count; + /* Make a ".reg/999" section. */ + return _bfd_elfcore_make_pseudosection (abfd, ".reg", + size, note->descpos + offset); +} - for (irel = internal_relocs; irel < irelend; irel++) +static bfd_boolean +ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) +{ + switch (note->descsz) { - unsigned long r_type = ELF32_R_TYPE (irel->r_info); - bfd_vma symaddr, reladdr, toff, roff; - asection *tsec; - struct one_fixup *f; - size_t insn_offset = 0; - bfd_vma max_branch_offset, val; - bfd_byte *hit_addr; - unsigned long t0; - unsigned char sym_type; + default: + return FALSE; - switch (r_type) - { - case R_PPC_REL24: - case R_PPC_LOCAL24PC: - case R_PPC_PLTREL24: - max_branch_offset = 1 << 25; - break; + case 128: /* Linux/PPC elf_prpsinfo. */ + elf_tdata (abfd)->core_program + = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); + elf_tdata (abfd)->core_command + = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); + } - case R_PPC_REL14: - case R_PPC_REL14_BRTAKEN: - case R_PPC_REL14_BRNTAKEN: - max_branch_offset = 1 << 15; - break; + /* Note that for some reason, a spurious space is tacked + onto the end of the args in some (at least one anyway) + implementations, so strip it off if it exists. */ - default: - continue; - } + { + char *command = elf_tdata (abfd)->core_command; + int n = strlen (command); - /* Get the value of the symbol referred to by the reloc. */ - if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) - { - /* A local symbol. */ - Elf_Internal_Sym *isym; + if (0 < n && command[n - 1] == ' ') + command[n - 1] = '\0'; + } - /* 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 == 0) - goto error_return; - } - isym = isymbuf + ELF32_R_SYM (irel->r_info); - if (isym->st_shndx == SHN_UNDEF) - continue; /* We can't do anything with undefined symbols. */ - else if (isym->st_shndx == SHN_ABS) - tsec = bfd_abs_section_ptr; - else if (isym->st_shndx == SHN_COMMON) - tsec = bfd_com_section_ptr; - else - tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); + return TRUE; +} - toff = isym->st_value; - sym_type = ELF_ST_TYPE (isym->st_info); - } - else - { - /* Global symbol handling. */ - unsigned long indx; - struct elf_link_hash_entry *h; +/* Return address for Ith PLT stub in section PLT, for relocation REL + or (bfd_vma) -1 if it should not be included. */ - indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; - h = elf_sym_hashes (abfd)[indx]; +static bfd_vma +ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, + const asection *plt ATTRIBUTE_UNUSED, + const arelent *rel) +{ + return rel->address; +} - 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; +/* Handle a PowerPC specific section when reading an object file. This + is called when elfcode.h finds a section with an unknown type. */ - if (r_type == R_PPC_PLTREL24 - && ppc_info->plt != NULL - && h->plt.offset != (bfd_vma) -1) - { - tsec = ppc_info->plt; - toff = h->plt.offset; - } - else if (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak) - { - tsec = h->root.u.def.section; - toff = h->root.u.def.value; - } - else - continue; +static bfd_boolean +ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name) +{ + asection *newsect; + flagword flags; - sym_type = h->type; - } + if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) + return FALSE; - /* If the branch and target are in the same section, you have - no hope of adding stubs. We'll error out later should the - branch overflow. */ - if (tsec == isec) - continue; + newsect = hdr->bfd_section; + flags = bfd_get_section_flags (abfd, newsect); + if (hdr->sh_flags & SHF_EXCLUDE) + flags |= SEC_EXCLUDE; - /* There probably isn't any reason to handle symbols in - SEC_MERGE sections; SEC_MERGE doesn't seem a likely - attribute for a code section, and we are only looking at - branches. However, implement it correctly here as a - reference for other target relax_section functions. */ - if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE) - { - /* At this stage in linking, no SEC_MERGE symbol has been - adjusted, so all references to such symbols need to be - passed through _bfd_merged_section_offset. (Later, in - relocate_section, all SEC_MERGE symbols *except* for - section symbols have been adjusted.) + if (hdr->sh_type == SHT_ORDERED) + flags |= SEC_SORT_ENTRIES; - gas may reduce relocations against symbols in SEC_MERGE - sections to a relocation against the section symbol when - the original addend was zero. When the reloc is against - a section symbol we should include the addend in the - offset passed to _bfd_merged_section_offset, since the - location of interest is the original symbol. On the - other hand, an access to "sym+addend" where "sym" is not - a section symbol should not include the addend; Such an - access is presumed to be an offset from "sym"; The - location of interest is just "sym". */ - if (sym_type == STT_SECTION) - toff += irel->r_addend; + bfd_set_section_flags (abfd, newsect, flags); + return TRUE; +} + +/* Set up any other section flags and such that may be necessary. */ + +static bfd_boolean +ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, + Elf_Internal_Shdr *shdr, + asection *asect) +{ + if ((asect->flags & SEC_EXCLUDE) != 0) + shdr->sh_flags |= SHF_EXCLUDE; + + if ((asect->flags & SEC_SORT_ENTRIES) != 0) + shdr->sh_type = SHT_ORDERED; + + return TRUE; +} + +/* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we + need to bump up the number of section headers. */ + +static int +ppc_elf_additional_program_headers (bfd *abfd) +{ + asection *s; + int ret = 0; - toff = _bfd_merged_section_offset (abfd, &tsec, - elf_section_data (tsec)->sec_info, - toff); + s = bfd_get_section_by_name (abfd, ".sbss2"); + if (s != NULL && (s->flags & SEC_ALLOC) != 0) + ++ret; - if (sym_type != STT_SECTION) - toff += irel->r_addend; - } - else - toff += irel->r_addend; + s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); + if (s != NULL && (s->flags & SEC_ALLOC) != 0) + ++ret; - symaddr = tsec->output_section->vma + tsec->output_offset + toff; + return ret; +} - roff = irel->r_offset; - reladdr = isec->output_section->vma + isec->output_offset + roff; +/* Add extra PPC sections -- Note, for now, make .sbss2 and + .PPC.EMB.sbss0 a normal section, and not a bss section so + that the linker doesn't crater when trying to make more than + 2 sections. */ - /* If the branch is in range, no need to do anything. */ - if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset) - continue; +static struct bfd_elf_special_section const ppc_elf_special_sections[]= +{ + { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC }, + { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, + { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, + { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC }, + { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC }, + { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 }, + { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC }, + { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC }, + { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, + { NULL, 0, 0, 0, 0 } +}; + +/* Very simple linked list structure for recording apuinfo values. */ +typedef struct apuinfo_list +{ + struct apuinfo_list *next; + unsigned long value; +} +apuinfo_list; - /* Look for an existing fixup to this address. */ - for (f = fixups; f ; f = f->next) - if (f->tsec == tsec && f->toff == toff) - break; +static apuinfo_list *head; - if (f == NULL) - { - size_t size; - unsigned long stub_rtype; - val = trampoff - roff; - if (val >= max_branch_offset) - /* Oh dear, we can't reach a trampoline. Don't try to add - one. We'll report an error later. */ - continue; +static void +apuinfo_list_init (void) +{ + head = NULL; +} - if (link_info->shared) - { - size = 4 * ARRAY_SIZE (shared_stub_entry); - insn_offset = 12; - stub_rtype = R_PPC_RELAX32PC; - } - else - { - size = 4 * ARRAY_SIZE (stub_entry); - insn_offset = 0; - stub_rtype = R_PPC_RELAX32; - } +static void +apuinfo_list_add (unsigned long value) +{ + apuinfo_list *entry = head; - if (R_PPC_RELAX32_PLT - R_PPC_RELAX32 - != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC) - abort (); - if (tsec == ppc_info->plt) - stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32; + while (entry != NULL) + { + if (entry->value == value) + return; + entry = entry->next; + } - /* Hijack the old relocation. Since we need two - relocations for this use a "composite" reloc. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - stub_rtype); - irel->r_offset = trampoff + insn_offset; + entry = bfd_malloc (sizeof (* entry)); + if (entry == NULL) + return; - /* Record the fixup so we don't do it again this section. */ - f = bfd_malloc (sizeof (*f)); - f->next = fixups; - f->tsec = tsec; - f->toff = toff; - f->trampoff = trampoff; - fixups = f; + entry->value = value; + entry->next = head; + head = entry; +} - trampoff += size; - } - else - { - val = f->trampoff - roff; - if (val >= max_branch_offset) - continue; +static unsigned +apuinfo_list_length (void) +{ + apuinfo_list *entry; + unsigned long count; - /* Nop out the reloc, since we're finalizing things here. */ - irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); - } + for (entry = head, count = 0; + entry; + entry = entry->next) + ++ count; - /* Get the section contents. */ - if (contents == NULL) - { - /* Get cached copy if it exists. */ - if (elf_section_data (isec)->this_hdr.contents != NULL) - contents = elf_section_data (isec)->this_hdr.contents; - else - { - /* Go get them off disk. */ - if (!bfd_malloc_and_get_section (abfd, isec, &contents)) - goto error_return; - } - } + return count; +} - /* Fix up the existing branch to hit the trampoline. */ - hit_addr = contents + roff; - switch (r_type) - { - case R_PPC_REL24: - case R_PPC_LOCAL24PC: - case R_PPC_PLTREL24: - t0 = bfd_get_32 (abfd, hit_addr); - t0 &= ~0x3fffffc; - t0 |= val & 0x3fffffc; - bfd_put_32 (abfd, t0, hit_addr); - break; +static inline unsigned long +apuinfo_list_element (unsigned long number) +{ + apuinfo_list * entry; - case R_PPC_REL14: - case R_PPC_REL14_BRTAKEN: - case R_PPC_REL14_BRNTAKEN: - t0 = bfd_get_32 (abfd, hit_addr); - t0 &= ~0xfffc; - t0 |= val & 0xfffc; - bfd_put_32 (abfd, t0, hit_addr); - break; - } - } + for (entry = head; + entry && number --; + entry = entry->next) + ; - /* Write out the trampolines. */ - changed = fixups != NULL; - if (fixups != NULL) + return entry ? entry->value : 0; +} + +static void +apuinfo_list_finish (void) +{ + apuinfo_list *entry; + + for (entry = head; entry;) { - const int *stub; - bfd_byte *dest; - bfd_vma val; - int i, size; + apuinfo_list *next = entry->next; + free (entry); + entry = next; + } - do - { - struct one_fixup *f = fixups; - fixups = fixups->next; - free (f); - } - while (fixups); + head = NULL; +} - contents = bfd_realloc (contents, trampoff); - if (contents == NULL) - goto error_return; +#define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" +#define APUINFO_LABEL "APUinfo" - isec->size = (isec->size + 3) & (bfd_vma) -4; - /* Branch around the trampolines. */ - val = trampoff - isec->size + 0x48000000; - dest = contents + isec->size; - isec->size = trampoff; - bfd_put_32 (abfd, val, dest); - dest += 4; +/* Scan the input BFDs and create a linked list of + the APUinfo values that will need to be emitted. */ - if (link_info->shared) - { - stub = shared_stub_entry; - size = ARRAY_SIZE (shared_stub_entry); - } - else - { - stub = stub_entry; - size = ARRAY_SIZE (stub_entry); - } +static void +ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) +{ + bfd *ibfd; + asection *asec; + char *buffer; + unsigned num_input_sections; + bfd_size_type output_section_size; + unsigned i; + unsigned num_entries; + unsigned long offset; + unsigned long length; + const char *error_message = NULL; - i = 0; - while (dest < contents + trampoff) - { - bfd_put_32 (abfd, stub[i], dest); - i++; - if (i == size) - i = 0; - dest += 4; - } - BFD_ASSERT (i == 0); - } + if (link_info == NULL) + return; - 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; - } - } + /* Scan the input bfds, looking for apuinfo sections. */ + num_input_sections = 0; + output_section_size = 0; - if (contents != NULL - && elf_section_data (isec)->this_hdr.contents != contents) + for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) { - if (!changed && !link_info->keep_memory) - free (contents); - else + asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); + if (asec) { - /* Cache the section contents for elf_link_input_bfd. */ - elf_section_data (isec)->this_hdr.contents = contents; + ++ num_input_sections; + output_section_size += asec->size; } } - if (elf_section_data (isec)->relocs != internal_relocs) - { - if (!changed) - free (internal_relocs); - else - elf_section_data (isec)->relocs = internal_relocs; - } + /* We need at least one input sections + in order to make merging worthwhile. */ + if (num_input_sections < 1) + return; - *again = changed; - return TRUE; + /* Just make sure that the output section exists as well. */ + asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); + if (asec == NULL) + return; - error_return: - if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) - free (isymbuf); - if (contents != NULL - && elf_section_data (isec)->this_hdr.contents != contents) - free (contents); - if (internal_relocs != NULL - && elf_section_data (isec)->relocs != internal_relocs) - free (internal_relocs); - return FALSE; -} - -static reloc_howto_type * -ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, - bfd_reloc_code_real_type code) -{ - enum elf_ppc_reloc_type r; + /* Allocate a buffer for the contents of the input sections. */ + buffer = bfd_malloc (output_section_size); + if (buffer == NULL) + return; - /* Initialize howto table if not already done. */ - if (!ppc_elf_howto_table[R_PPC_ADDR32]) - ppc_elf_howto_init (); + offset = 0; + apuinfo_list_init (); - switch (code) + /* Read in the input sections contents. */ + for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) { - default: - return NULL; + unsigned long datum; + char *ptr; - case BFD_RELOC_NONE: r = R_PPC_NONE; break; - case BFD_RELOC_32: r = R_PPC_ADDR32; break; - case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; - case BFD_RELOC_16: r = R_PPC_ADDR16; break; - case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; - case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; - case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; - case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; - case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; - case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; - case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; - case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; - case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; - case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; - case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; - case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; - case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; - case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; - case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; - case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; - case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; - case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; - case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; - case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; - case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; - case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; - case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; - case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; - case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; - case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; - case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; - case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; - case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; - case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; - case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; - case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; - case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; - case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; - case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; - case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; - case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; - case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; - case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; - case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; - case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; - case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; - case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; - case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; - case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; - case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; - case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; - case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; - case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; - case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; - case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; - case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; - case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; - case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; - case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; - case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; - case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; - case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; - case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; - case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; - case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; - case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; - case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; - case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; - case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; - case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; - case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; - case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; - case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; - case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; - case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; - case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; - case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; - case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; - case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; - case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; - case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; - } + asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); + if (asec == NULL) + continue; - return ppc_elf_howto_table[r]; -}; + length = asec->size; + if (length < 24) + { + error_message = _("corrupt or empty %s section in %B"); + goto fail; + } -/* Set the howto pointer for a PowerPC ELF reloc. */ + if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 + || (bfd_bread (buffer + offset, length, ibfd) != length)) + { + error_message = _("unable to read in %s section from %B"); + goto fail; + } -static void -ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, - arelent *cache_ptr, - Elf_Internal_Rela *dst) -{ - /* Initialize howto table if not already done. */ - if (!ppc_elf_howto_table[R_PPC_ADDR32]) - ppc_elf_howto_init (); + /* Process the contents of the section. */ + ptr = buffer + offset; + error_message = _("corrupt %s section in %B"); - BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); - cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; -} + /* Verify the contents of the header. Note - we have to + extract the values this way in order to allow for a + host whose endian-ness is different from the target. */ + datum = bfd_get_32 (ibfd, ptr); + if (datum != sizeof APUINFO_LABEL) + goto fail; -/* Handle the R_PPC_ADDR16_HA reloc. */ + datum = bfd_get_32 (ibfd, ptr + 8); + if (datum != 0x2) + goto fail; -static bfd_reloc_status_type -ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, - arelent *reloc_entry, - asymbol *symbol, - void *data ATTRIBUTE_UNUSED, - asection *input_section, - bfd *output_bfd, - char **error_message ATTRIBUTE_UNUSED) -{ - bfd_vma relocation; + if (strcmp (ptr + 12, APUINFO_LABEL) != 0) + goto fail; - if (output_bfd != NULL) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; + /* Get the number of bytes used for apuinfo entries. */ + datum = bfd_get_32 (ibfd, ptr + 4); + if (datum + 20 != length) + goto fail; + + /* Make sure that we do not run off the end of the section. */ + if (offset + length > output_section_size) + goto fail; + + /* Scan the apuinfo section, building a list of apuinfo numbers. */ + for (i = 0; i < datum; i += 4) + apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i)); + + /* Update the offset. */ + offset += length; } - if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) - return bfd_reloc_outofrange; + error_message = NULL; - if (bfd_is_com_section (symbol->section)) - relocation = 0; - else - relocation = symbol->value; + /* Compute the size of the output section. */ + num_entries = apuinfo_list_length (); + output_section_size = 20 + num_entries * 4; - relocation += symbol->section->output_section->vma; - relocation += symbol->section->output_offset; - relocation += reloc_entry->addend; + asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); + + if (! bfd_set_section_size (abfd, asec, output_section_size)) + ibfd = abfd, + error_message = _("warning: unable to set size of %s section in %B"); + + fail: + free (buffer); + + if (error_message) + (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); +} - reloc_entry->addend += (relocation & 0x8000) << 1; +/* Prevent the output section from accumulating the input sections' + contents. We have already stored this in our linked list structure. */ - return bfd_reloc_continue; +static bfd_boolean +ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, + asection *asec, + bfd_byte *contents ATTRIBUTE_UNUSED) +{ + return (apuinfo_list_length () + && strcmp (asec->name, APUINFO_SECTION_NAME) == 0); } -static bfd_reloc_status_type -ppc_elf_unhandled_reloc (bfd *abfd, - arelent *reloc_entry, - asymbol *symbol, - void *data, - asection *input_section, - bfd *output_bfd, - char **error_message) +/* Finally we can generate the output section. */ + +static void +ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) { - /* If this is a relocatable link (output_bfd test tells us), just - call the generic function. Any adjustment will be done at final - link time. */ - if (output_bfd != NULL) - return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, - input_section, output_bfd, error_message); + bfd_byte *buffer; + asection *asec; + unsigned i; + unsigned num_entries; + bfd_size_type length; - if (error_message != NULL) + asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); + if (asec == NULL) + return; + + if (apuinfo_list_length () == 0) + return; + + length = asec->size; + if (length < 20) + return; + + buffer = bfd_malloc (length); + if (buffer == NULL) { - static char buf[60]; - sprintf (buf, _("generic linker can't handle %s"), - reloc_entry->howto->name); - *error_message = buf; + (*_bfd_error_handler) + (_("failed to allocate space for new APUinfo section.")); + return; } - return bfd_reloc_dangerous; -} -/* Fix bad default arch selected for a 32 bit input bfd when the - default is 64 bit. */ + /* Create the apuinfo header. */ + num_entries = apuinfo_list_length (); + bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); + bfd_put_32 (abfd, num_entries * 4, buffer + 4); + bfd_put_32 (abfd, 0x2, buffer + 8); + strcpy ((char *) buffer + 12, APUINFO_LABEL); -static bfd_boolean -ppc_elf_object_p (bfd *abfd) -{ - if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) + length = 20; + for (i = 0; i < num_entries; i++) { - Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); - - if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) - { - /* Relies on arch after 64 bit default being 32 bit default. */ - abfd->arch_info = abfd->arch_info->next; - BFD_ASSERT (abfd->arch_info->bits_per_word == 32); - } + bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); + length += 4; } - return TRUE; -} -/* Function to set whether a module needs the -mrelocatable bit set. */ + if (length != asec->size) + (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); -static bfd_boolean -ppc_elf_set_private_flags (bfd *abfd, flagword flags) -{ - BFD_ASSERT (!elf_flags_init (abfd) - || elf_elfheader (abfd)->e_flags == flags); + if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) + (*_bfd_error_handler) (_("failed to install new APUinfo section.")); - elf_elfheader (abfd)->e_flags = flags; - elf_flags_init (abfd) = TRUE; - return TRUE; + free (buffer); + + apuinfo_list_finish (); } + +/* The following functions are specific to the ELF linker, while + functions above are used generally. They appear in this file more + or less in the order in which they are called. eg. + ppc_elf_check_relocs is called early in the link process, + ppc_elf_finish_dynamic_sections is one of the last functions + called. */ -/* Merge backend specific data from an object file to the output - object file when linking. */ +/* The PPC linker needs to keep track of the number of relocs that it + decides to copy as dynamic relocs in check_relocs for each symbol. + This is so that it can later discard them if they are found to be + unnecessary. We store the information in a field extending the + regular ELF linker hash table. */ -static bfd_boolean -ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) +struct ppc_elf_dyn_relocs { - flagword old_flags; - flagword new_flags; - bfd_boolean error; + struct ppc_elf_dyn_relocs *next; - /* Check if we have the same endianess. */ - if (! _bfd_generic_verify_endian_match (ibfd, obfd)) - return FALSE; + /* The input section of the reloc. */ + asection *sec; - if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour - || bfd_get_flavour (obfd) != bfd_target_elf_flavour) - return TRUE; + /* Total number of relocs copied for the input section. */ + bfd_size_type count; - new_flags = elf_elfheader (ibfd)->e_flags; - old_flags = elf_elfheader (obfd)->e_flags; - if (!elf_flags_init (obfd)) - { - /* First call, no flags set. */ - elf_flags_init (obfd) = TRUE; - elf_elfheader (obfd)->e_flags = new_flags; - } + /* Number of pc-relative relocs copied for the input section. */ + bfd_size_type pc_count; +}; - /* Compatible flags are ok. */ - else if (new_flags == old_flags) - ; +/* Of those relocs that might be copied as dynamic relocs, this macro + selects those that must be copied when linking a shared library, + even when the symbol is local. */ - /* Incompatible flags. */ - else - { - /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib - to be linked with either. */ - error = FALSE; - if ((new_flags & EF_PPC_RELOCATABLE) != 0 - && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) - { - error = TRUE; - (*_bfd_error_handler) - (_("%B: compiled with -mrelocatable and linked with " - "modules compiled normally"), ibfd); - } - else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 - && (old_flags & EF_PPC_RELOCATABLE) != 0) - { - error = TRUE; - (*_bfd_error_handler) - (_("%B: compiled normally and linked with " - "modules compiled with -mrelocatable"), ibfd); - } +#define MUST_BE_DYN_RELOC(RTYPE) \ + ((RTYPE) != R_PPC_REL24 \ + && (RTYPE) != R_PPC_REL14 \ + && (RTYPE) != R_PPC_REL14_BRTAKEN \ + && (RTYPE) != R_PPC_REL14_BRNTAKEN \ + && (RTYPE) != R_PPC_REL32) - /* The output is -mrelocatable-lib iff both the input files are. */ - if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) - elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; +/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid + copying dynamic variables from a shared lib into an app's dynbss + section, and instead use a dynamic relocation to point into the + shared lib. */ +#define ELIMINATE_COPY_RELOCS 1 - /* The output is -mrelocatable iff it can't be -mrelocatable-lib, - but each input file is either -mrelocatable or -mrelocatable-lib. */ - if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) - && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) - && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) - elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; +/* PPC ELF linker hash entry. */ - /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if - any module uses it. */ - elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); +struct ppc_elf_link_hash_entry +{ + struct elf_link_hash_entry elf; - new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); - old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); + /* If this symbol is used in the linker created sections, the processor + specific backend uses this field to map the field into the offset + from the beginning of the section. */ + elf_linker_section_pointers_t *linker_section_pointer; - /* Warn about any other mismatches. */ - if (new_flags != old_flags) - { - error = TRUE; - (*_bfd_error_handler) - (_("%B: uses different e_flags (0x%lx) fields " - "than previous modules (0x%lx)"), - ibfd, (long) new_flags, (long) old_flags); - } + /* Track dynamic relocs copied for this symbol. */ + struct ppc_elf_dyn_relocs *dyn_relocs; - if (error) - { - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - } + /* Contexts in which symbol is used in the GOT (or TOC). + TLS_GD .. TLS_TLS bits are or'd into the mask as the + corresponding relocs are encountered during check_relocs. + tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to + indicate the corresponding GOT entry type is not needed. */ +#define TLS_GD 1 /* GD reloc. */ +#define TLS_LD 2 /* LD reloc. */ +#define TLS_TPREL 4 /* TPREL reloc, => IE. */ +#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ +#define TLS_TLS 16 /* Any TLS reloc. */ +#define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ + char tls_mask; +}; - return TRUE; -} - -/* Handle a PowerPC specific section when reading an object file. This - is called when elfcode.h finds a section with an unknown type. */ +#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) + +/* PPC ELF linker hash table. */ + +struct ppc_elf_link_hash_table +{ + struct elf_link_hash_table elf; + + /* Short-cuts to get to dynamic linker sections. */ + asection *got; + asection *relgot; + asection *plt; + asection *relplt; + asection *dynbss; + asection *relbss; + asection *dynsbss; + asection *relsbss; + elf_linker_section_t *sdata; + elf_linker_section_t *sdata2; + asection *sbss; + + /* Shortcut to .__tls_get_addr. */ + struct elf_link_hash_entry *tls_get_addr; -static bfd_boolean -ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name) -{ - asection *newsect; - flagword flags; + /* TLS local dynamic got entry handling. */ + union { + bfd_signed_vma refcount; + bfd_vma offset; + } tlsld_got; - if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) - return FALSE; + /* Small local sym to section mapping cache. */ + struct sym_sec_cache sym_sec; +}; - newsect = hdr->bfd_section; - flags = bfd_get_section_flags (abfd, newsect); - if (hdr->sh_flags & SHF_EXCLUDE) - flags |= SEC_EXCLUDE; +/* Get the PPC ELF linker hash table from a link_info structure. */ - if (hdr->sh_type == SHT_ORDERED) - flags |= SEC_SORT_ENTRIES; +#define ppc_elf_hash_table(p) \ + ((struct ppc_elf_link_hash_table *) (p)->hash) - bfd_set_section_flags (abfd, newsect, flags); - return TRUE; -} - -/* Set up any other section flags and such that may be necessary. */ +/* Create an entry in a PPC ELF linker hash table. */ -static bfd_boolean -ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, - Elf_Internal_Shdr *shdr, - asection *asect) +static struct bfd_hash_entry * +ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) { - if ((asect->flags & SEC_EXCLUDE) != 0) - shdr->sh_flags |= SHF_EXCLUDE; + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (entry == NULL) + { + entry = bfd_hash_allocate (table, + sizeof (struct ppc_elf_link_hash_entry)); + if (entry == NULL) + return entry; + } - if ((asect->flags & SEC_SORT_ENTRIES) != 0) - shdr->sh_type = SHT_ORDERED; + /* Call the allocation method of the superclass. */ + entry = _bfd_elf_link_hash_newfunc (entry, table, string); + if (entry != NULL) + { + ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; + ppc_elf_hash_entry (entry)->dyn_relocs = NULL; + ppc_elf_hash_entry (entry)->tls_mask = 0; + } - return TRUE; + return entry; } - -/* Find a linker generated pointer with a given addend and type. */ - -static elf_linker_section_pointers_t * -elf_find_pointer_linker_section - (elf_linker_section_pointers_t *linker_pointers, - bfd_vma addend, - elf_linker_section_t *lsect) -{ - for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) - if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) - return linker_pointers; - return NULL; -} - -/* Allocate a pointer to live in a linker created section. */ +/* Create a PPC ELF linker hash table. */ -static bfd_boolean -elf_create_pointer_linker_section (bfd *abfd, - struct bfd_link_info *info, - elf_linker_section_t *lsect, - struct elf_link_hash_entry *h, - const Elf_Internal_Rela *rel) +static struct bfd_link_hash_table * +ppc_elf_link_hash_table_create (bfd *abfd) { - elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; - elf_linker_section_pointers_t *linker_section_ptr; - unsigned long r_symndx = ELF32_R_SYM (rel->r_info); - bfd_size_type amt; + struct ppc_elf_link_hash_table *ret; - BFD_ASSERT (lsect != NULL); + ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); + if (ret == NULL) + return NULL; - /* Is this a global symbol? */ - if (h != NULL) + if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, + ppc_elf_link_hash_newfunc)) { - struct ppc_elf_link_hash_entry *eh; + free (ret); + return NULL; + } - /* Has this symbol already been allocated? If so, our work is done. */ - eh = (struct ppc_elf_link_hash_entry *) h; - if (elf_find_pointer_linker_section (eh->linker_section_pointer, - rel->r_addend, - lsect)) - return TRUE; + return &ret->elf.root; +} - ptr_linker_section_ptr = &eh->linker_section_pointer; - /* Make sure this symbol is output as a dynamic symbol. */ - if (h->dynindx == -1) - { - if (! bfd_elf_link_record_dynamic_symbol (info, h)) - return FALSE; - } +/* The powerpc .got has a blrl instruction in it. Mark it executable. */ - if (lsect->rel_section) - lsect->rel_section->size += sizeof (Elf32_External_Rela); - } - else - { - /* Allocation of a pointer to a local symbol. */ - elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); +static bfd_boolean +ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) +{ + struct ppc_elf_link_hash_table *htab; + asection *s; + flagword flags; - /* Allocate a table to hold the local symbols if first time. */ - if (!ptr) - { - unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; + if (!_bfd_elf_create_got_section (abfd, info)) + return FALSE; - amt = num_symbols; - amt *= sizeof (elf_linker_section_pointers_t *); - ptr = bfd_zalloc (abfd, amt); + htab = ppc_elf_hash_table (info); + htab->got = s = bfd_get_section_by_name (abfd, ".got"); + if (s == NULL) + abort (); - if (!ptr) - return FALSE; + flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED); + if (!bfd_set_section_flags (abfd, s, flags)) + return FALSE; - elf_local_ptr_offsets (abfd) = ptr; - } + htab->relgot = bfd_make_section (abfd, ".rela.got"); + if (!htab->relgot + || ! bfd_set_section_flags (abfd, htab->relgot, + (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS + | SEC_IN_MEMORY | SEC_LINKER_CREATED + | SEC_READONLY)) + || ! bfd_set_section_alignment (abfd, htab->relgot, 2)) + return FALSE; - /* Has this symbol already been allocated? If so, our work is done. */ - if (elf_find_pointer_linker_section (ptr[r_symndx], - rel->r_addend, - lsect)) - return TRUE; + return TRUE; +} - ptr_linker_section_ptr = &ptr[r_symndx]; +/* We have to create .dynsbss and .rela.sbss here so that they get mapped + to output sections (just like _bfd_elf_create_dynamic_sections has + to create .dynbss and .rela.bss). */ - if (info->shared) - { - /* If we are generating a shared object, we need to - output a R__RELATIVE reloc so that the - dynamic linker can adjust this GOT entry. */ - BFD_ASSERT (lsect->rel_section != NULL); - lsect->rel_section->size += sizeof (Elf32_External_Rela); - } - } +static bfd_boolean +ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) +{ + struct ppc_elf_link_hash_table *htab; + asection *s; + flagword flags; - /* Allocate space for a pointer in the linker section, and allocate - a new pointer record from internal memory. */ - BFD_ASSERT (ptr_linker_section_ptr != NULL); - amt = sizeof (elf_linker_section_pointers_t); - linker_section_ptr = bfd_alloc (abfd, amt); + htab = ppc_elf_hash_table (info); - if (!linker_section_ptr) + if (htab->got == NULL + && !ppc_elf_create_got (abfd, info)) return FALSE; - linker_section_ptr->next = *ptr_linker_section_ptr; - linker_section_ptr->addend = rel->r_addend; - linker_section_ptr->lsect = lsect; - linker_section_ptr->written_address_p = FALSE; - *ptr_linker_section_ptr = linker_section_ptr; - - linker_section_ptr->offset = lsect->section->size; - lsect->section->size += 4; + if (!_bfd_elf_create_dynamic_sections (abfd, info)) + return FALSE; -#ifdef DEBUG - fprintf (stderr, - "Create pointer in linker section %s, offset = %ld, section size = %ld\n", - lsect->name, (long) linker_section_ptr->offset, - (long) lsect->section->size); -#endif + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED); - return TRUE; -} - -#define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR) + htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss"); + htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss"); + if (s == NULL + || ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED)) + return FALSE; -/* Fill in the address for a pointer generated in a linker section. */ + if (! info->shared) + { + htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss"); + htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss"); + if (s == NULL + || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) + || ! bfd_set_section_alignment (abfd, s, 2)) + return FALSE; + } -static bfd_vma -elf_finish_pointer_linker_section (bfd *output_bfd, - bfd *input_bfd, - struct bfd_link_info *info, - elf_linker_section_t *lsect, - struct elf_link_hash_entry *h, - bfd_vma relocation, - const Elf_Internal_Rela *rel, - int relative_reloc) -{ - elf_linker_section_pointers_t *linker_section_ptr; + htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt"); + htab->plt = s = bfd_get_section_by_name (abfd, ".plt"); + if (s == NULL) + abort (); - BFD_ASSERT (lsect != NULL); + flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED; + return bfd_set_section_flags (abfd, s, flags); +} - if (h != NULL) - { - /* Handle global symbol. */ - struct ppc_elf_link_hash_entry *eh; +/* Copy the extra info we tack onto an elf_link_hash_entry. */ - eh = (struct ppc_elf_link_hash_entry *) h; - linker_section_ptr - = elf_find_pointer_linker_section (eh->linker_section_pointer, - rel->r_addend, - lsect); +static void +ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed, + struct elf_link_hash_entry *dir, + struct elf_link_hash_entry *ind) +{ + struct ppc_elf_link_hash_entry *edir, *eind; - BFD_ASSERT (linker_section_ptr != NULL); + edir = (struct ppc_elf_link_hash_entry *) dir; + eind = (struct ppc_elf_link_hash_entry *) ind; - if (! elf_hash_table (info)->dynamic_sections_created - || (info->shared - && info->symbolic - && h->def_regular)) + if (eind->dyn_relocs != NULL) + { + if (edir->dyn_relocs != NULL) { - /* This is actually a static link, or it is a - -Bsymbolic link and the symbol is defined - locally. We must initialize this entry in the - global section. + struct ppc_elf_dyn_relocs **pp; + struct ppc_elf_dyn_relocs *p; - When doing a dynamic link, we create a .rela. - relocation entry to initialize the value. This - is done in the finish_dynamic_symbol routine. */ - if (!linker_section_ptr->written_address_p) + if (ind->root.type == bfd_link_hash_indirect) + abort (); + + /* Add reloc counts against the weak sym to the strong sym + list. Merge any entries against the same section. */ + for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) { - linker_section_ptr->written_address_p = TRUE; - bfd_put_ptr (output_bfd, - relocation + linker_section_ptr->addend, - (lsect->section->contents - + linker_section_ptr->offset)); + struct ppc_elf_dyn_relocs *q; + + for (q = edir->dyn_relocs; q != NULL; q = q->next) + if (q->sec == p->sec) + { + q->pc_count += p->pc_count; + q->count += p->count; + *pp = p->next; + break; + } + if (q == NULL) + pp = &p->next; } + *pp = edir->dyn_relocs; } + + edir->dyn_relocs = eind->dyn_relocs; + eind->dyn_relocs = NULL; } - else - { - /* Handle local symbol. */ - unsigned long r_symndx = ELF32_R_SYM (rel->r_info); - BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); - BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL); - linker_section_ptr = (elf_find_pointer_linker_section - (elf_local_ptr_offsets (input_bfd)[r_symndx], - rel->r_addend, - lsect)); - BFD_ASSERT (linker_section_ptr != NULL); + edir->tls_mask |= eind->tls_mask; - /* Write out pointer if it hasn't been rewritten out before. */ - if (!linker_section_ptr->written_address_p) - { - linker_section_ptr->written_address_p = TRUE; - bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, - lsect->section->contents + linker_section_ptr->offset); + if (ELIMINATE_COPY_RELOCS + && ind->root.type != bfd_link_hash_indirect + && dir->dynamic_adjusted) + { + /* If called to transfer flags for a weakdef during processing + of elf_adjust_dynamic_symbol, don't copy non_got_ref. + We clear it ourselves for ELIMINATE_COPY_RELOCS. */ + dir->ref_dynamic |= ind->ref_dynamic; + dir->ref_regular |= ind->ref_regular; + dir->ref_regular_nonweak |= ind->ref_regular_nonweak; + dir->needs_plt |= ind->needs_plt; + } + else + _bfd_elf_link_hash_copy_indirect (bed, dir, ind); +} - if (info->shared) - { - /* We need to generate a relative reloc for the dynamic - linker. */ +/* 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. */ - asection *srel = lsect->rel_section; - Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL]; - bfd_byte *erel; - const struct elf_backend_data *bed; - unsigned int i; +static bfd_boolean +ppc_elf_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) +{ + if (sym->st_shndx == SHN_COMMON + && !info->relocatable + && sym->st_size <= elf_gp_size (abfd) + && (info->hash->creator == abfd->xvec + || info->hash->creator == abfd->xvec->alternative_target)) + { + /* Common symbols less than or equal to -G nn bytes are automatically + put into .sbss. */ + struct ppc_elf_link_hash_table *htab; - BFD_ASSERT (srel != NULL); + htab = ppc_elf_hash_table (info); + if (htab->sbss == NULL) + { + flagword flags = SEC_IS_COMMON; - bed = get_elf_backend_data (output_bfd); - for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) - { - outrel[i].r_offset = (lsect->section->output_section->vma - + lsect->section->output_offset - + linker_section_ptr->offset); - outrel[i].r_info = 0; - outrel[i].r_addend = 0; - } - outrel[0].r_info = ELF32_R_INFO (0, relative_reloc); - erel = lsect->section->contents; - erel += (elf_section_data (lsect->section)->rel_count++ - * sizeof (Elf32_External_Rela)); - bfd_elf32_swap_reloca_out (output_bfd, outrel, erel); - } + htab->sbss = bfd_make_section_anyway (abfd, ".sbss"); + if (htab->sbss == NULL + || ! bfd_set_section_flags (abfd, htab->sbss, flags)) + return FALSE; } - } - - relocation = (lsect->section->output_offset - + linker_section_ptr->offset - - lsect->sym_offset); -#ifdef DEBUG - fprintf (stderr, - "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", - lsect->name, (long) relocation, (long) relocation); -#endif + *secp = htab->sbss; + *valp = sym->st_size; + } - /* Subtract out the addend, because it will get added back in by the normal - processing. */ - return relocation - linker_section_ptr->addend; + return TRUE; } +/* Enumeration to specify the special section. */ +enum elf_linker_section_enum +{ + LINKER_SECTION_SDATA, + LINKER_SECTION_SDATA2 +}; + /* Create a special linker section */ static elf_linker_section_t * ppc_elf_create_linker_section (bfd *abfd, @@ -2711,1871 +2593,2183 @@ ppc_elf_create_linker_section (bfd *abfd, return lsect; } - -/* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we - need to bump up the number of section headers. */ -static int -ppc_elf_additional_program_headers (bfd *abfd) +/* Find a linker generated pointer with a given addend and type. */ + +static elf_linker_section_pointers_t * +elf_find_pointer_linker_section + (elf_linker_section_pointers_t *linker_pointers, + bfd_vma addend, + elf_linker_section_t *lsect) { - asection *s; - int ret = 0; + for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) + if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) + return linker_pointers; - s = bfd_get_section_by_name (abfd, ".sbss2"); - if (s != NULL && (s->flags & SEC_ALLOC) != 0) - ++ret; + return NULL; +} + +/* Allocate a pointer to live in a linker created section. */ + +static bfd_boolean +elf_create_pointer_linker_section (bfd *abfd, + struct bfd_link_info *info, + elf_linker_section_t *lsect, + struct elf_link_hash_entry *h, + const Elf_Internal_Rela *rel) +{ + elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; + elf_linker_section_pointers_t *linker_section_ptr; + unsigned long r_symndx = ELF32_R_SYM (rel->r_info); + bfd_size_type amt; + + BFD_ASSERT (lsect != NULL); + + /* Is this a global symbol? */ + if (h != NULL) + { + struct ppc_elf_link_hash_entry *eh; + + /* Has this symbol already been allocated? If so, our work is done. */ + eh = (struct ppc_elf_link_hash_entry *) h; + if (elf_find_pointer_linker_section (eh->linker_section_pointer, + rel->r_addend, + lsect)) + return TRUE; + + ptr_linker_section_ptr = &eh->linker_section_pointer; + /* Make sure this symbol is output as a dynamic symbol. */ + if (h->dynindx == -1) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + if (lsect->rel_section) + lsect->rel_section->size += sizeof (Elf32_External_Rela); + } + else + { + /* Allocation of a pointer to a local symbol. */ + elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); + + /* Allocate a table to hold the local symbols if first time. */ + if (!ptr) + { + unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; + + amt = num_symbols; + amt *= sizeof (elf_linker_section_pointers_t *); + ptr = bfd_zalloc (abfd, amt); + + if (!ptr) + return FALSE; + + elf_local_ptr_offsets (abfd) = ptr; + } + + /* Has this symbol already been allocated? If so, our work is done. */ + if (elf_find_pointer_linker_section (ptr[r_symndx], + rel->r_addend, + lsect)) + return TRUE; - s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); - if (s != NULL && (s->flags & SEC_ALLOC) != 0) - ++ret; + ptr_linker_section_ptr = &ptr[r_symndx]; - return ret; -} - -/* The powerpc .got has a blrl instruction in it. Mark it executable. */ + if (info->shared) + { + /* If we are generating a shared object, we need to + output a R__RELATIVE reloc so that the + dynamic linker can adjust this GOT entry. */ + BFD_ASSERT (lsect->rel_section != NULL); + lsect->rel_section->size += sizeof (Elf32_External_Rela); + } + } -static bfd_boolean -ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) -{ - struct ppc_elf_link_hash_table *htab; - asection *s; - flagword flags; + /* Allocate space for a pointer in the linker section, and allocate + a new pointer record from internal memory. */ + BFD_ASSERT (ptr_linker_section_ptr != NULL); + amt = sizeof (elf_linker_section_pointers_t); + linker_section_ptr = bfd_alloc (abfd, amt); - if (!_bfd_elf_create_got_section (abfd, info)) + if (!linker_section_ptr) return FALSE; - htab = ppc_elf_hash_table (info); - htab->got = s = bfd_get_section_by_name (abfd, ".got"); - if (s == NULL) - abort (); + linker_section_ptr->next = *ptr_linker_section_ptr; + linker_section_ptr->addend = rel->r_addend; + linker_section_ptr->lsect = lsect; + linker_section_ptr->written_address_p = FALSE; + *ptr_linker_section_ptr = linker_section_ptr; - flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY - | SEC_LINKER_CREATED); - if (!bfd_set_section_flags (abfd, s, flags)) - return FALSE; + linker_section_ptr->offset = lsect->section->size; + lsect->section->size += 4; - htab->relgot = bfd_make_section (abfd, ".rela.got"); - if (!htab->relgot - || ! bfd_set_section_flags (abfd, htab->relgot, - (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS - | SEC_IN_MEMORY | SEC_LINKER_CREATED - | SEC_READONLY)) - || ! bfd_set_section_alignment (abfd, htab->relgot, 2)) - return FALSE; +#ifdef DEBUG + fprintf (stderr, + "Create pointer in linker section %s, offset = %ld, section size = %ld\n", + lsect->name, (long) linker_section_ptr->offset, + (long) lsect->section->size); +#endif return TRUE; } -/* We have to create .dynsbss and .rela.sbss here so that they get mapped - to output sections (just like _bfd_elf_create_dynamic_sections has - to create .dynbss and .rela.bss). */ - static bfd_boolean -ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) +update_local_sym_info (bfd *abfd, + Elf_Internal_Shdr *symtab_hdr, + unsigned long r_symndx, + int tls_type) { - struct ppc_elf_link_hash_table *htab; - asection *s; - flagword flags; - - htab = ppc_elf_hash_table (info); - - if (htab->got == NULL - && !ppc_elf_create_got (abfd, info)) - return FALSE; - - if (!_bfd_elf_create_dynamic_sections (abfd, info)) - return FALSE; - - flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY - | SEC_LINKER_CREATED); - - htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss"); - htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss"); - if (s == NULL - || ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED)) - return FALSE; + bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); + char *local_got_tls_masks; - if (! info->shared) + if (local_got_refcounts == NULL) { - htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss"); - htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss"); - if (s == NULL - || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) - || ! bfd_set_section_alignment (abfd, s, 2)) + bfd_size_type size = symtab_hdr->sh_info; + + size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks); + local_got_refcounts = bfd_zalloc (abfd, size); + if (local_got_refcounts == NULL) return FALSE; + elf_local_got_refcounts (abfd) = local_got_refcounts; } - htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt"); - htab->plt = s = bfd_get_section_by_name (abfd, ".plt"); - if (s == NULL) - abort (); + local_got_refcounts[r_symndx] += 1; + local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info); + local_got_tls_masks[r_symndx] |= tls_type; + return TRUE; +} - flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED; - return bfd_set_section_flags (abfd, s, flags); +static void +bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) +{ + (*_bfd_error_handler) + (_("%B: relocation %s cannot be used when making a shared object"), + abfd, + ppc_elf_howto_table[r_type]->name); + bfd_set_error (bfd_error_bad_value); } -/* 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. */ +/* Look through the relocs for a section during the first phase, and + allocate space in the global offset table or procedure linkage + table. */ static bfd_boolean -ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, - struct elf_link_hash_entry *h) +ppc_elf_check_relocs (bfd *abfd, + struct bfd_link_info *info, + asection *sec, + const Elf_Internal_Rela *relocs) { struct ppc_elf_link_hash_table *htab; - asection *s; - unsigned int power_of_two; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + asection *sreloc; + + if (info->relocatable) + return TRUE; #ifdef DEBUG - fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", - h->root.root.string); + _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", + sec, abfd); #endif - /* Make sure we know what is going on here. */ + /* Initialize howto table if not already done. */ + if (!ppc_elf_howto_table[R_PPC_ADDR32]) + ppc_elf_howto_init (); + + /* Create the linker generated sections all the time so that the + special symbols are created. */ htab = ppc_elf_hash_table (info); - BFD_ASSERT (htab->elf.dynobj != NULL - && (h->needs_plt - || h->u.weakdef != NULL - || (h->def_dynamic - && h->ref_regular - && !h->def_regular))); + if (htab->sdata == NULL) + { + htab->sdata = ppc_elf_create_linker_section (abfd, info, + LINKER_SECTION_SDATA); + if (htab->sdata == NULL) + return FALSE; + } - /* Deal with function syms. */ - if (h->type == STT_FUNC - || h->needs_plt) + if (htab->sdata2 == NULL) { - /* Clear procedure linkage table information for any symbol that - won't need a .plt entry. */ - if (h->plt.refcount <= 0 - || SYMBOL_CALLS_LOCAL (info, h) - || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT - && h->root.type == bfd_link_hash_undefweak)) + htab->sdata2 = ppc_elf_create_linker_section (abfd, info, + LINKER_SECTION_SDATA2); + if (htab->sdata2 == NULL) + return FALSE; + } + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + sreloc = NULL; + + rel_end = relocs + sec->reloc_count; + for (rel = relocs; rel < rel_end; rel++) + { + unsigned long r_symndx; + enum elf_ppc_reloc_type r_type; + struct elf_link_hash_entry *h; + int tls_type = 0; + + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx < symtab_hdr->sh_info) + h = NULL; + else + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + + /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. + This shows up in particular in an R_PPC_ADDR32 in the eabi + startup code. */ + if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) { - /* A PLT entry is not required/allowed when: + if (htab->got == NULL) + { + if (htab->elf.dynobj == NULL) + htab->elf.dynobj = abfd; + if (!ppc_elf_create_got (htab->elf.dynobj, info)) + return FALSE; + } + } - 1. We are not using ld.so; because then the PLT entry - can't be set up, so we can't use one. In this case, - ppc_elf_adjust_dynamic_symbol won't even be called. + r_type = ELF32_R_TYPE (rel->r_info); + switch (r_type) + { + case R_PPC_GOT_TLSLD16: + case R_PPC_GOT_TLSLD16_LO: + case R_PPC_GOT_TLSLD16_HI: + case R_PPC_GOT_TLSLD16_HA: + htab->tlsld_got.refcount += 1; + tls_type = TLS_TLS | TLS_LD; + goto dogottls; - 2. GC has rendered the entry unused. + case R_PPC_GOT_TLSGD16: + case R_PPC_GOT_TLSGD16_LO: + case R_PPC_GOT_TLSGD16_HI: + case R_PPC_GOT_TLSGD16_HA: + tls_type = TLS_TLS | TLS_GD; + goto dogottls; + + case R_PPC_GOT_TPREL16: + case R_PPC_GOT_TPREL16_LO: + case R_PPC_GOT_TPREL16_HI: + case R_PPC_GOT_TPREL16_HA: + if (info->shared) + info->flags |= DF_STATIC_TLS; + tls_type = TLS_TLS | TLS_TPREL; + goto dogottls; + + case R_PPC_GOT_DTPREL16: + case R_PPC_GOT_DTPREL16_LO: + case R_PPC_GOT_DTPREL16_HI: + case R_PPC_GOT_DTPREL16_HA: + tls_type = TLS_TLS | TLS_DTPREL; + dogottls: + sec->has_tls_reloc = 1; + /* Fall thru */ - 3. We know for certain that a call to this symbol - will go to this object, or will remain undefined. */ - h->plt.offset = (bfd_vma) -1; - h->needs_plt = 0; - } - return TRUE; - } - else - h->plt.offset = (bfd_vma) -1; + /* GOT16 relocations */ + case R_PPC_GOT16: + case R_PPC_GOT16_LO: + case R_PPC_GOT16_HI: + case R_PPC_GOT16_HA: + /* This symbol requires a global offset table entry. */ + if (htab->got == NULL) + { + if (htab->elf.dynobj == NULL) + htab->elf.dynobj = abfd; + if (!ppc_elf_create_got (htab->elf.dynobj, info)) + return FALSE; + } + if (h != NULL) + { + h->got.refcount += 1; + ppc_elf_hash_entry (h)->tls_mask |= tls_type; + } + else + /* This is a global offset table entry for a local symbol. */ + if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) + return FALSE; + break; - /* 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; - if (ELIMINATE_COPY_RELOCS) - h->non_got_ref = h->u.weakdef->non_got_ref; - return TRUE; - } + /* Indirect .sdata relocation. */ + case R_PPC_EMB_SDAI16: + if (info->shared) + { + bad_shared_reloc (abfd, r_type); + return FALSE; + } + if (!elf_create_pointer_linker_section (abfd, info, + htab->sdata, h, rel)) + return FALSE; + break; - /* This is a reference to a symbol defined by a dynamic object which - is not a function. */ + /* Indirect .sdata2 relocation. */ + case R_PPC_EMB_SDA2I16: + if (info->shared) + { + bad_shared_reloc (abfd, r_type); + return FALSE; + } + if (!elf_create_pointer_linker_section (abfd, info, + htab->sdata2, h, rel)) + return FALSE; + break; - /* If we are creating a shared library, we must presume that the - only references to the symbol are via the global offset table. - For such cases we need not do anything here; the relocations will - be handled correctly by relocate_section. */ - if (info->shared) - return TRUE; + case R_PPC_SDAREL16: + case R_PPC_EMB_SDA2REL: + case R_PPC_EMB_SDA21: + case R_PPC_EMB_RELSDA: + case R_PPC_EMB_NADDR32: + case R_PPC_EMB_NADDR16: + case R_PPC_EMB_NADDR16_LO: + case R_PPC_EMB_NADDR16_HI: + case R_PPC_EMB_NADDR16_HA: + if (info->shared) + { + bad_shared_reloc (abfd, r_type); + return FALSE; + } + break; - /* If there are no references to this symbol that do not use the - GOT, we don't need to generate a copy reloc. */ - if (!h->non_got_ref) - return TRUE; + case R_PPC_PLT32: + case R_PPC_PLTREL24: + case R_PPC_PLTREL32: + case R_PPC_PLT16_LO: + case R_PPC_PLT16_HI: + case R_PPC_PLT16_HA: +#ifdef DEBUG + fprintf (stderr, "Reloc requires a PLT entry\n"); +#endif + /* This symbol requires a procedure linkage table entry. We + actually build the entry in finish_dynamic_symbol, + because this might be a case of linking PIC code without + linking in any dynamic objects, in which case we don't + need to generate a procedure linkage table after all. */ - if (ELIMINATE_COPY_RELOCS) - { - struct ppc_elf_dyn_relocs *p; - for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) - { - s = p->sec->output_section; - if (s != NULL && (s->flags & SEC_READONLY) != 0) - break; - } + if (h == NULL) + { + /* It does not make sense to have a procedure linkage + table entry for a local symbol. */ + (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against " + "local symbol"), + abfd, + sec, + (long) rel->r_offset, + ppc_elf_howto_table[r_type]->name); + bfd_set_error (bfd_error_bad_value); + return FALSE; + } - /* If we didn't find any dynamic relocs in read-only sections, then - we'll be keeping the dynamic relocs and avoiding the copy reloc. */ - if (p == NULL) - { - h->non_got_ref = 0; - return TRUE; - } - } + h->needs_plt = 1; + h->plt.refcount++; + break; - /* We must allocate the symbol in our .dynbss section, which will - become part of the .bss section of the executable. There will be - an entry for this symbol in the .dynsym section. The dynamic - object will contain position independent code, so all references - from the dynamic object to this symbol will go through the global - offset table. The dynamic linker will use the .dynsym entry to - determine the address it must put in the global offset table, so - both the dynamic object and the regular object will refer to the - same memory location for the variable. + /* The following relocations don't need to propagate the + relocation if linking a shared object since they are + section relative. */ + case R_PPC_SECTOFF: + case R_PPC_SECTOFF_LO: + case R_PPC_SECTOFF_HI: + case R_PPC_SECTOFF_HA: + case R_PPC_DTPREL16: + case R_PPC_DTPREL16_LO: + case R_PPC_DTPREL16_HI: + case R_PPC_DTPREL16_HA: + case R_PPC_TOC16: + break; - Of course, if the symbol is sufficiently small, we must instead - allocate it in .sbss. FIXME: It would be better to do this if and - only if there were actually SDAREL relocs for that symbol. */ + /* This are just markers. */ + case R_PPC_TLS: + case R_PPC_EMB_MRKREF: + case R_PPC_NONE: + case R_PPC_max: + break; - if (h->size <= elf_gp_size (htab->elf.dynobj)) - s = htab->dynsbss; - else - s = htab->dynbss; - BFD_ASSERT (s != NULL); + /* These should only appear in dynamic objects. */ + case R_PPC_COPY: + case R_PPC_GLOB_DAT: + case R_PPC_JMP_SLOT: + case R_PPC_RELATIVE: + break; - /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to - copy the initial value out of the dynamic object and into the - runtime process image. We need to remember the offset into the - .rela.bss section we are going to use. */ - if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) - { - asection *srel; + /* These aren't handled yet. We'll report an error later. */ + case R_PPC_ADDR30: + case R_PPC_EMB_RELSEC16: + case R_PPC_EMB_RELST_LO: + case R_PPC_EMB_RELST_HI: + case R_PPC_EMB_RELST_HA: + case R_PPC_EMB_BIT_FLD: + break; - if (h->size <= elf_gp_size (htab->elf.dynobj)) - srel = htab->relsbss; - else - srel = htab->relbss; - BFD_ASSERT (srel != NULL); - srel->size += sizeof (Elf32_External_Rela); - h->needs_copy = 1; - } + /* This refers only to functions defined in the shared library. */ + case R_PPC_LOCAL24PC: + break; - /* We need to figure out the alignment required for this symbol. I - have no idea how ELF linkers handle this. */ - power_of_two = bfd_log2 (h->size); - if (power_of_two > 4) - power_of_two = 4; + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_PPC_GNU_VTINHERIT: + if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) + return FALSE; + break; - /* Apply the required alignment. */ - s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); - if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) - { - if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) - return FALSE; - } + /* This relocation describes which C++ vtable entries are actually + used. Record for later use during GC. */ + case R_PPC_GNU_VTENTRY: + if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return FALSE; + break; - /* Define the symbol as being at this point in the section. */ - h->root.u.def.section = s; - h->root.u.def.value = s->size; + /* We shouldn't really be seeing these. */ + case R_PPC_TPREL32: + if (info->shared) + info->flags |= DF_STATIC_TLS; + goto dodyn; - /* Increment the section size to make room for the symbol. */ - s->size += h->size; + /* Nor these. */ + case R_PPC_DTPMOD32: + case R_PPC_DTPREL32: + goto dodyn; - return TRUE; -} - -/* Of those relocs that might be copied as dynamic relocs, this macro - selects those that must be copied when linking a shared library, - even when the symbol is local. */ + case R_PPC_TPREL16: + case R_PPC_TPREL16_LO: + case R_PPC_TPREL16_HI: + case R_PPC_TPREL16_HA: + if (info->shared) + info->flags |= DF_STATIC_TLS; + goto dodyn; -#define MUST_BE_DYN_RELOC(RTYPE) \ - ((RTYPE) != R_PPC_REL24 \ - && (RTYPE) != R_PPC_REL14 \ - && (RTYPE) != R_PPC_REL14_BRTAKEN \ - && (RTYPE) != R_PPC_REL14_BRNTAKEN \ - && (RTYPE) != R_PPC_REL32) + /* When creating a shared object, we must copy these + relocs into the output file. We create a reloc + section in dynobj and make room for the reloc. */ + case R_PPC_REL24: + case R_PPC_REL14: + case R_PPC_REL14_BRTAKEN: + case R_PPC_REL14_BRNTAKEN: + case R_PPC_REL32: + if (h == NULL + || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + break; + /* fall through */ -/* Allocate space in associated reloc sections for dynamic relocs. */ + case R_PPC_ADDR32: + case R_PPC_ADDR24: + case R_PPC_ADDR16: + case R_PPC_ADDR16_LO: + case R_PPC_ADDR16_HI: + case R_PPC_ADDR16_HA: + case R_PPC_ADDR14: + case R_PPC_ADDR14_BRTAKEN: + case R_PPC_ADDR14_BRNTAKEN: + case R_PPC_UADDR32: + case R_PPC_UADDR16: + if (h != NULL && !info->shared) + { + /* We may need a plt entry if the symbol turns out to be + a function defined in a dynamic object. */ + h->plt.refcount++; -static bfd_boolean -allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) -{ - struct bfd_link_info *info = inf; - struct ppc_elf_link_hash_entry *eh; - struct ppc_elf_link_hash_table *htab; - struct ppc_elf_dyn_relocs *p; + /* We may need a copy reloc too. */ + h->non_got_ref = 1; + } - if (h->root.type == bfd_link_hash_indirect) - return TRUE; + dodyn: + /* If we are creating a shared library, and this is a reloc + against a global symbol, or a non PC relative reloc + against a local symbol, then we need to copy the reloc + into the shared library. However, if we are linking with + -Bsymbolic, we do not need to copy a reloc against a + global symbol which is defined in an object we are + including in the link (i.e., DEF_REGULAR is set). At + this point we have not seen all the input files, so it is + possible that DEF_REGULAR is not set now but will be set + later (it is never cleared). In case of a weak definition, + DEF_REGULAR may be cleared later by a strong definition in + a shared library. We account for that possibility below by + storing information in the dyn_relocs field of the hash + table entry. A similar situation occurs when creating + shared libraries and symbol visibility changes render the + symbol local. - if (h->root.type == bfd_link_hash_warning) - /* When warning symbols are created, they **replace** the "real" - entry in the hash table, thus we never get to see the real - symbol in a hash traversal. So look at it now. */ - h = (struct elf_link_hash_entry *) h->root.u.i.link; + If on the other hand, we are creating an executable, we + may need to keep relocations for symbols satisfied by a + dynamic library if we manage to avoid copy relocs for the + symbol. */ + if ((info->shared + && (MUST_BE_DYN_RELOC (r_type) + || (h != NULL + && (! info->symbolic + || h->root.type == bfd_link_hash_defweak + || !h->def_regular)))) + || (ELIMINATE_COPY_RELOCS + && !info->shared + && (sec->flags & SEC_ALLOC) != 0 + && h != NULL + && (h->root.type == bfd_link_hash_defweak + || !h->def_regular))) + { + struct ppc_elf_dyn_relocs *p; + struct ppc_elf_dyn_relocs **head; - htab = ppc_elf_hash_table (info); - if (htab->elf.dynamic_sections_created - && h->plt.refcount > 0) - { - /* Make sure this symbol is output as a dynamic symbol. */ - if (h->dynindx == -1 - && !h->forced_local) - { - if (! bfd_elf_link_record_dynamic_symbol (info, h)) - return FALSE; - } +#ifdef DEBUG + fprintf (stderr, + "ppc_elf_check_relocs needs to " + "create relocation for %s\n", + (h && h->root.root.string + ? h->root.root.string : "")); +#endif + if (sreloc == NULL) + { + const char *name; - if (info->shared - || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) - { - asection *s = htab->plt; + name = (bfd_elf_string_from_elf_section + (abfd, + elf_elfheader (abfd)->e_shstrndx, + elf_section_data (sec)->rel_hdr.sh_name)); + if (name == NULL) + return FALSE; - /* If this is the first .plt entry, make room for the special - first entry. */ - if (s->size == 0) - s->size += PLT_INITIAL_ENTRY_SIZE; + BFD_ASSERT (strncmp (name, ".rela", 5) == 0 + && strcmp (bfd_get_section_name (abfd, sec), + name + 5) == 0); - /* The PowerPC PLT is actually composed of two parts, the - first part is 2 words (for a load and a jump), and then - there is a remaining word available at the end. */ - h->plt.offset = (PLT_INITIAL_ENTRY_SIZE - + (PLT_SLOT_SIZE - * ((s->size - PLT_INITIAL_ENTRY_SIZE) - / PLT_ENTRY_SIZE))); + sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); + if (sreloc == NULL) + { + flagword flags; - /* If this symbol is not defined in a regular file, and we - are not generating a shared library, then set the symbol - to this location in the .plt. This is required to make - function pointers compare as equal between the normal - executable and the shared library. */ - if (! info->shared - && !h->def_regular) - { - h->root.u.def.section = s; - h->root.u.def.value = h->plt.offset; - } + sreloc = bfd_make_section (htab->elf.dynobj, name); + flags = (SEC_HAS_CONTENTS | SEC_READONLY + | SEC_IN_MEMORY | SEC_LINKER_CREATED); + if ((sec->flags & SEC_ALLOC) != 0) + flags |= SEC_ALLOC | SEC_LOAD; + if (sreloc == NULL + || ! bfd_set_section_flags (htab->elf.dynobj, + sreloc, flags) + || ! bfd_set_section_alignment (htab->elf.dynobj, + sreloc, 2)) + return FALSE; + } + elf_section_data (sec)->sreloc = sreloc; + } - /* Make room for this entry. After the 8192nd entry, room - for two entries is allocated. */ - s->size += PLT_ENTRY_SIZE; - if ((s->size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE - > PLT_NUM_SINGLE_ENTRIES) - s->size += PLT_ENTRY_SIZE; + /* If this is a global symbol, we count the number of + relocations we need for this symbol. */ + if (h != NULL) + { + head = &ppc_elf_hash_entry (h)->dyn_relocs; + } + else + { + /* Track dynamic relocs needed for local syms too. + We really need local syms available to do this + easily. Oh well. */ - /* We also need to make an entry in the .rela.plt section. */ - htab->relplt->size += sizeof (Elf32_External_Rela); - } - else - { - h->plt.offset = (bfd_vma) -1; - h->needs_plt = 0; - } - } - else - { - h->plt.offset = (bfd_vma) -1; - h->needs_plt = 0; - } + asection *s; + s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, + sec, r_symndx); + if (s == NULL) + return FALSE; - eh = (struct ppc_elf_link_hash_entry *) h; - if (eh->elf.got.refcount > 0) - { - /* Make sure this symbol is output as a dynamic symbol. */ - if (eh->elf.dynindx == -1 - && !eh->elf.forced_local) - { - if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) - return FALSE; - } + head = ((struct ppc_elf_dyn_relocs **) + &elf_section_data (s)->local_dynrel); + } - if (eh->tls_mask == (TLS_TLS | TLS_LD) - && !eh->elf.def_dynamic) - /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */ - eh->elf.got.offset = (bfd_vma) -1; - else - { - bfd_boolean dyn; - eh->elf.got.offset = htab->got->size; - if ((eh->tls_mask & TLS_TLS) != 0) - { - if ((eh->tls_mask & TLS_LD) != 0) - htab->got->size += 8; - if ((eh->tls_mask & TLS_GD) != 0) - htab->got->size += 8; - if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) - htab->got->size += 4; - if ((eh->tls_mask & TLS_DTPREL) != 0) - htab->got->size += 4; - } - else - htab->got->size += 4; - dyn = htab->elf.dynamic_sections_created; - if ((info->shared - || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) - && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT - || eh->elf.root.type != bfd_link_hash_undefweak)) - { - /* All the entries we allocated need relocs. */ - htab->relgot->size - += ((htab->got->size - eh->elf.got.offset) / 4 - * sizeof (Elf32_External_Rela)); - /* Except LD only needs one. */ - if ((eh->tls_mask & TLS_LD) != 0) - htab->relgot->size -= sizeof (Elf32_External_Rela); + p = *head; + if (p == NULL || p->sec != sec) + { + p = bfd_alloc (htab->elf.dynobj, sizeof *p); + if (p == NULL) + return FALSE; + p->next = *head; + *head = p; + p->sec = sec; + p->count = 0; + p->pc_count = 0; + } + + p->count += 1; + if (!MUST_BE_DYN_RELOC (r_type)) + p->pc_count += 1; } + + break; } } - else - eh->elf.got.offset = (bfd_vma) -1; - - if (eh->dyn_relocs == NULL) - return TRUE; - /* In the shared -Bsymbolic case, discard space allocated for - dynamic pc-relative relocs against symbols which turn out to be - defined in regular objects. For the normal shared case, discard - space for relocs that have become local due to symbol visibility - changes. */ + return TRUE; +} + +/* Return the section that should be marked against GC for a given + relocation. */ - if (info->shared) +static asection * +ppc_elf_gc_mark_hook (asection *sec, + struct bfd_link_info *info ATTRIBUTE_UNUSED, + Elf_Internal_Rela *rel, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) +{ + if (h != NULL) { - /* Relocs that use pc_count are those that appear on a call insn, - or certain REL relocs (see MUST_BE_DYN_RELOC) that can be - generated via assembly. We want calls to protected symbols to - resolve directly to the function rather than going via the plt. - If people want function pointer comparisons to work as expected - then they should avoid writing weird assembly. */ - if (SYMBOL_CALLS_LOCAL (info, h)) + switch (ELF32_R_TYPE (rel->r_info)) { - struct ppc_elf_dyn_relocs **pp; + case R_PPC_GNU_VTINHERIT: + case R_PPC_GNU_VTENTRY: + break; - for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) + default: + switch (h->root.type) { - p->count -= p->pc_count; - p->pc_count = 0; - if (p->count == 0) - *pp = p->next; - else - pp = &p->next; + case bfd_link_hash_defined: + case bfd_link_hash_defweak: + return h->root.u.def.section; + + case bfd_link_hash_common: + return h->root.u.c.p->section; + + default: + break; } } + } + else + return bfd_section_from_elf_index (sec->owner, sym->st_shndx); - /* Also discard relocs on undefined weak syms with non-default - visibility. */ - if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT - && h->root.type == bfd_link_hash_undefweak) - eh->dyn_relocs = NULL; + return NULL; +} - /* Make sure undefined weak symbols are output as a dynamic symbol - in PIEs. */ - if (info->pie - && eh->dyn_relocs != NULL - && h->dynindx == -1 - && h->root.type == bfd_link_hash_undefweak - && !h->forced_local) +/* Update the got, plt and dynamic reloc reference counts for the + section being removed. */ + +static bfd_boolean +ppc_elf_gc_sweep_hook (bfd *abfd, + struct bfd_link_info *info, + asection *sec, + const Elf_Internal_Rela *relocs) +{ + struct ppc_elf_link_hash_table *htab; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + bfd_signed_vma *local_got_refcounts; + const Elf_Internal_Rela *rel, *relend; + + elf_section_data (sec)->local_dynrel = NULL; + + htab = ppc_elf_hash_table (info); + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + local_got_refcounts = elf_local_got_refcounts (abfd); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; rel++) + { + unsigned long r_symndx; + enum elf_ppc_reloc_type r_type; + struct elf_link_hash_entry *h = NULL; + + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) { - if (! bfd_elf_link_record_dynamic_symbol (info, h)) - return FALSE; + struct ppc_elf_dyn_relocs **pp, *p; + struct ppc_elf_link_hash_entry *eh; + + 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; + eh = (struct ppc_elf_link_hash_entry *) h; + + for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) + if (p->sec == sec) + { + /* Everything must go for SEC. */ + *pp = p->next; + break; + } } - } - else if (ELIMINATE_COPY_RELOCS) - { - /* For the non-shared case, discard space for relocs against - symbols which turn out to need copy relocs or are not - dynamic. */ - if (!h->non_got_ref - && h->def_dynamic - && !h->def_regular) + r_type = ELF32_R_TYPE (rel->r_info); + switch (r_type) { - /* Make sure this symbol is output as a dynamic symbol. - Undefined weak syms won't yet be marked as dynamic. */ - if (h->dynindx == -1 - && !h->forced_local) + case R_PPC_GOT_TLSLD16: + case R_PPC_GOT_TLSLD16_LO: + case R_PPC_GOT_TLSLD16_HI: + case R_PPC_GOT_TLSLD16_HA: + htab->tlsld_got.refcount -= 1; + /* Fall thru */ + + case R_PPC_GOT_TLSGD16: + case R_PPC_GOT_TLSGD16_LO: + case R_PPC_GOT_TLSGD16_HI: + case R_PPC_GOT_TLSGD16_HA: + case R_PPC_GOT_TPREL16: + case R_PPC_GOT_TPREL16_LO: + case R_PPC_GOT_TPREL16_HI: + case R_PPC_GOT_TPREL16_HA: + case R_PPC_GOT_DTPREL16: + case R_PPC_GOT_DTPREL16_LO: + case R_PPC_GOT_DTPREL16_HI: + case R_PPC_GOT_DTPREL16_HA: + case R_PPC_GOT16: + case R_PPC_GOT16_LO: + case R_PPC_GOT16_HI: + case R_PPC_GOT16_HA: + if (h != NULL) { - if (! bfd_elf_link_record_dynamic_symbol (info, h)) - return FALSE; + if (h->got.refcount > 0) + h->got.refcount--; } + else if (local_got_refcounts != NULL) + { + if (local_got_refcounts[r_symndx] > 0) + local_got_refcounts[r_symndx]--; + } + break; - /* If that succeeded, we know we'll be keeping all the - relocs. */ - if (h->dynindx != -1) - goto keep; - } - - eh->dyn_relocs = NULL; + case R_PPC_REL24: + case R_PPC_REL14: + case R_PPC_REL14_BRTAKEN: + case R_PPC_REL14_BRNTAKEN: + case R_PPC_REL32: + if (h == NULL + || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + break; + /* Fall thru */ - keep: ; - } + case R_PPC_ADDR32: + case R_PPC_ADDR24: + case R_PPC_ADDR16: + case R_PPC_ADDR16_LO: + case R_PPC_ADDR16_HI: + case R_PPC_ADDR16_HA: + case R_PPC_ADDR14: + case R_PPC_ADDR14_BRTAKEN: + case R_PPC_ADDR14_BRNTAKEN: + case R_PPC_UADDR32: + case R_PPC_UADDR16: + case R_PPC_PLT32: + case R_PPC_PLTREL24: + case R_PPC_PLT16_LO: + case R_PPC_PLT16_HI: + case R_PPC_PLT16_HA: + if (h != NULL) + { + if (h->plt.refcount > 0) + h->plt.refcount--; + } + break; - /* Finally, allocate space. */ - for (p = eh->dyn_relocs; p != NULL; p = p->next) - { - asection *sreloc = elf_section_data (p->sec)->sreloc; - sreloc->size += p->count * sizeof (Elf32_External_Rela); + default: + break; + } } - return TRUE; } + +/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ -/* Find any dynamic relocs that apply to read-only sections. */ - -static bfd_boolean -readonly_dynrelocs (struct elf_link_hash_entry *h, void *info) +asection * +ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) { - struct ppc_elf_dyn_relocs *p; - - if (h->root.type == bfd_link_hash_indirect) - return TRUE; - - if (h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; - - for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) - { - asection *s = p->sec->output_section; + struct ppc_elf_link_hash_table *htab; - if (s != NULL - && ((s->flags & (SEC_READONLY | SEC_ALLOC)) - == (SEC_READONLY | SEC_ALLOC))) - { - ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; + htab = ppc_elf_hash_table (info); + htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", + FALSE, FALSE, TRUE); - /* Not an error, just cut short the traversal. */ - return FALSE; - } - } - return TRUE; + return _bfd_elf_tls_setup (obfd, info); } -/* Set the sizes of the dynamic sections. */ +/* Run through all the TLS relocs looking for optimization + opportunities. */ -static bfd_boolean -ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, - struct bfd_link_info *info) +bfd_boolean +ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) { - struct ppc_elf_link_hash_table *htab; - asection *s; - bfd_boolean relocs; bfd *ibfd; + asection *sec; + struct ppc_elf_link_hash_table *htab; -#ifdef DEBUG - fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); -#endif + if (info->relocatable || info->shared) + return TRUE; htab = ppc_elf_hash_table (info); - BFD_ASSERT (htab->elf.dynobj != NULL); - - if (elf_hash_table (info)->dynamic_sections_created) + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) { - /* Set the contents of the .interp section to the interpreter. */ - if (info->executable) - { - s = bfd_get_section_by_name (htab->elf.dynobj, ".interp"); - BFD_ASSERT (s != NULL); - s->size = sizeof ELF_DYNAMIC_INTERPRETER; - s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; - } - } + Elf_Internal_Sym *locsyms = NULL; + Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; - if (htab->tlsld_got.refcount > 0) - { - htab->tlsld_got.offset = htab->got->size; - htab->got->size += 8; - if (info->shared) - htab->relgot->size += sizeof (Elf32_External_Rela); - } - else - htab->tlsld_got.offset = (bfd_vma) -1; + for (sec = ibfd->sections; sec != NULL; sec = sec->next) + if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) + { + Elf_Internal_Rela *relstart, *rel, *relend; + int expecting_tls_get_addr; - /* Set up .got offsets for local syms, and space for local dynamic - relocs. */ - for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) - { - bfd_signed_vma *local_got; - bfd_signed_vma *end_local_got; - char *lgot_masks; - bfd_size_type locsymcount; - Elf_Internal_Shdr *symtab_hdr; - asection *srel; + /* Read the relocations. */ + relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, + info->keep_memory); + if (relstart == NULL) + return FALSE; - if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) - continue; + expecting_tls_get_addr = 0; + relend = relstart + sec->reloc_count; + for (rel = relstart; rel < relend; rel++) + { + enum elf_ppc_reloc_type r_type; + unsigned long r_symndx; + struct elf_link_hash_entry *h = NULL; + char *tls_mask; + char tls_set, tls_clear; + bfd_boolean is_local; - for (s = ibfd->sections; s != NULL; s = s->next) - { - struct ppc_elf_dyn_relocs *p; + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + struct elf_link_hash_entry **sym_hashes; - for (p = ((struct ppc_elf_dyn_relocs *) - elf_section_data (s)->local_dynrel); - p != NULL; - p = p->next) - { - if (!bfd_is_abs_section (p->sec) - && bfd_is_abs_section (p->sec->output_section)) - { - /* Input section has been discarded, either because - it is a copy of a linkonce section or due to - linker script /DISCARD/, so we'll be discarding - the relocs too. */ - } - else if (p->count != 0) - { - elf_section_data (p->sec)->sreloc->size - += p->count * sizeof (Elf32_External_Rela); - if ((p->sec->output_section->flags - & (SEC_READONLY | SEC_ALLOC)) - == (SEC_READONLY | SEC_ALLOC)) - info->flags |= DF_TEXTREL; - } - } - } + sym_hashes = elf_sym_hashes (ibfd); + 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; + } - local_got = elf_local_got_refcounts (ibfd); - if (!local_got) - continue; + is_local = FALSE; + if (h == NULL + || !h->def_dynamic) + is_local = TRUE; - symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; - locsymcount = symtab_hdr->sh_info; - end_local_got = local_got + locsymcount; - lgot_masks = (char *) end_local_got; - s = htab->got; - srel = htab->relgot; - for (; local_got < end_local_got; ++local_got, ++lgot_masks) - if (*local_got > 0) - { - if (*lgot_masks == (TLS_TLS | TLS_LD)) - { - /* If just an LD reloc, we'll just use - htab->tlsld_got.offset. */ - if (htab->tlsld_got.offset == (bfd_vma) -1) + r_type = ELF32_R_TYPE (rel->r_info); + switch (r_type) { - htab->tlsld_got.offset = s->size; - s->size += 8; - if (info->shared) - srel->size += sizeof (Elf32_External_Rela); + case R_PPC_GOT_TLSLD16: + case R_PPC_GOT_TLSLD16_LO: + case R_PPC_GOT_TLSLD16_HI: + case R_PPC_GOT_TLSLD16_HA: + /* These relocs should never be against a symbol + defined in a shared lib. Leave them alone if + that turns out to be the case. */ + expecting_tls_get_addr = 0; + htab->tlsld_got.refcount -= 1; + if (!is_local) + continue; + + /* LD -> LE */ + tls_set = 0; + tls_clear = TLS_LD; + expecting_tls_get_addr = 1; + break; + + case R_PPC_GOT_TLSGD16: + case R_PPC_GOT_TLSGD16_LO: + case R_PPC_GOT_TLSGD16_HI: + case R_PPC_GOT_TLSGD16_HA: + if (is_local) + /* GD -> LE */ + tls_set = 0; + else + /* GD -> IE */ + tls_set = TLS_TLS | TLS_TPRELGD; + tls_clear = TLS_GD; + expecting_tls_get_addr = 1; + break; + + case R_PPC_GOT_TPREL16: + case R_PPC_GOT_TPREL16_LO: + case R_PPC_GOT_TPREL16_HI: + case R_PPC_GOT_TPREL16_HA: + expecting_tls_get_addr = 0; + if (is_local) + { + /* IE -> LE */ + tls_set = 0; + tls_clear = TLS_TPREL; + break; + } + else + continue; + + case R_PPC_REL14: + case R_PPC_REL14_BRTAKEN: + case R_PPC_REL14_BRNTAKEN: + case R_PPC_REL24: + if (expecting_tls_get_addr + && h != NULL + && h == htab->tls_get_addr) + { + if (h->plt.refcount > 0) + h->plt.refcount -= 1; + } + expecting_tls_get_addr = 0; + continue; + + default: + expecting_tls_get_addr = 0; + continue; } - *local_got = (bfd_vma) -1; - } - else - { - *local_got = s->size; - if ((*lgot_masks & TLS_TLS) != 0) + + if (h != NULL) { - if ((*lgot_masks & TLS_GD) != 0) - s->size += 8; - if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) - s->size += 4; - if ((*lgot_masks & TLS_DTPREL) != 0) - s->size += 4; + if (tls_set == 0) + { + /* We managed to get rid of a got entry. */ + if (h->got.refcount > 0) + h->got.refcount -= 1; + } + tls_mask = &ppc_elf_hash_entry (h)->tls_mask; + } + else + { + Elf_Internal_Sym *sym; + bfd_signed_vma *lgot_refs; + char *lgot_masks; + + if (locsyms == NULL) + { + locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; + if (locsyms == NULL) + locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, + symtab_hdr->sh_info, + 0, NULL, NULL, NULL); + if (locsyms == NULL) + { + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + return FALSE; + } + } + sym = locsyms + r_symndx; + lgot_refs = elf_local_got_refcounts (ibfd); + if (lgot_refs == NULL) + abort (); + if (tls_set == 0) + { + /* We managed to get rid of a got entry. */ + if (lgot_refs[r_symndx] > 0) + lgot_refs[r_symndx] -= 1; + } + lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info); + tls_mask = &lgot_masks[r_symndx]; } - else - s->size += 4; - if (info->shared) - srel->size += ((s->size - *local_got) / 4 - * sizeof (Elf32_External_Rela)); + + *tls_mask |= tls_set; + *tls_mask &= ~tls_clear; } + + if (elf_section_data (sec)->relocs != relstart) + free (relstart); } - else - *local_got = (bfd_vma) -1; + + if (locsyms != NULL + && (symtab_hdr->contents != (unsigned char *) locsyms)) + { + if (!info->keep_memory) + free (locsyms); + else + symtab_hdr->contents = (unsigned char *) locsyms; + } } + 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. */ - /* Allocate space for global sym dynamic relocs. */ - elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); +static bfd_boolean +ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h) +{ + struct ppc_elf_link_hash_table *htab; + asection *s; + unsigned int power_of_two; - /* We've now determined the sizes of the various dynamic sections. - Allocate memory for them. */ - relocs = FALSE; - for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) - { - if ((s->flags & SEC_LINKER_CREATED) == 0) - continue; +#ifdef DEBUG + fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", + h->root.root.string); +#endif - if (s == htab->plt - || s == htab->got) - { - /* Strip this section if we don't need it; see the - comment below. */ - } - else if ((htab->sdata != NULL && s == htab->sdata->section) - || (htab->sdata2 != NULL && s == htab->sdata2->section)) - { - if (s->size == 0) - /* Don't strip these sections. We need them because they - define _SDA_BASE_ and _SDA2_BASE_. crt1.o makes a - reference to _SDA_BASE_ to set up r13. */ - continue; - } - else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) - { - if (s->size == 0) - { - /* If we don't need this section, strip it from the - output file. This is mostly to handle .rela.bss and - .rela.plt. We must create both sections in - create_dynamic_sections, because they 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. */ - } - else - { - /* Remember whether there are any relocation sections. */ - relocs = TRUE; + /* Make sure we know what is going on here. */ + htab = ppc_elf_hash_table (info); + BFD_ASSERT (htab->elf.dynobj != NULL + && (h->needs_plt + || h->u.weakdef != NULL + || (h->def_dynamic + && h->ref_regular + && !h->def_regular))); - /* We use the reloc_count field as a counter if we need - to copy relocs into the output file. */ - s->reloc_count = 0; - } - } - else + /* Deal with function syms. */ + if (h->type == STT_FUNC + || h->needs_plt) + { + /* Clear procedure linkage table information for any symbol that + won't need a .plt entry. */ + if (h->plt.refcount <= 0 + || SYMBOL_CALLS_LOCAL (info, h) + || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + && h->root.type == bfd_link_hash_undefweak)) { - /* It's not one of our sections, so don't allocate space. */ - continue; - } + /* A PLT entry is not required/allowed when: - if (s->size == 0) - { - _bfd_strip_section_from_output (info, s); - continue; - } + 1. We are not using ld.so; because then the PLT entry + can't be set up, so we can't use one. In this case, + ppc_elf_adjust_dynamic_symbol won't even be called. - /* Allocate memory for the section contents. */ - s->contents = bfd_zalloc (htab->elf.dynobj, s->size); - if (s->contents == NULL) - return FALSE; + 2. GC has rendered the entry unused. + + 3. We know for certain that a call to this symbol + will go to this object, or will remain undefined. */ + h->plt.offset = (bfd_vma) -1; + h->needs_plt = 0; + } + return TRUE; } + else + h->plt.offset = (bfd_vma) -1; - if (htab->elf.dynamic_sections_created) + /* 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) { - /* Add some entries to the .dynamic section. We fill in the - values later, in ppc_elf_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) + 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; + if (ELIMINATE_COPY_RELOCS) + h->non_got_ref = h->u.weakdef->non_got_ref; + return TRUE; + } - if (info->executable) - { - if (!add_dynamic_entry (DT_DEBUG, 0)) - return FALSE; - } + /* This is a reference to a symbol defined by a dynamic object which + is not a function. */ - if (htab->plt != NULL && htab->plt->size != 0) - { - 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; - } + /* If we are creating a shared library, we must presume that the + only references to the symbol are via the global offset table. + For such cases we need not do anything here; the relocations will + be handled correctly by relocate_section. */ + if (info->shared) + return TRUE; - if (relocs) + /* If there are no references to this symbol that do not use the + GOT, we don't need to generate a copy reloc. */ + if (!h->non_got_ref) + return TRUE; + + if (ELIMINATE_COPY_RELOCS) + { + struct ppc_elf_dyn_relocs *p; + for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) { - if (!add_dynamic_entry (DT_RELA, 0) - || !add_dynamic_entry (DT_RELASZ, 0) - || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) - return FALSE; + s = p->sec->output_section; + if (s != NULL && (s->flags & SEC_READONLY) != 0) + break; } - /* If any dynamic relocs apply to a read-only section, then we - need a DT_TEXTREL entry. */ - if ((info->flags & DF_TEXTREL) == 0) - elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs, - info); - - if ((info->flags & DF_TEXTREL) != 0) + /* If we didn't find any dynamic relocs in read-only sections, then + we'll be keeping the dynamic relocs and avoiding the copy reloc. */ + if (p == NULL) { - if (!add_dynamic_entry (DT_TEXTREL, 0)) - return FALSE; + h->non_got_ref = 0; + return TRUE; } } -#undef add_dynamic_entry - return TRUE; -} - -static bfd_boolean -update_local_sym_info (bfd *abfd, - Elf_Internal_Shdr *symtab_hdr, - unsigned long r_symndx, - int tls_type) -{ - bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); - char *local_got_tls_masks; + /* We must allocate the symbol in our .dynbss section, which will + become part of the .bss section of the executable. There will be + an entry for this symbol in the .dynsym section. The dynamic + object will contain position independent code, so all references + from the dynamic object to this symbol will go through the global + offset table. The dynamic linker will use the .dynsym entry to + determine the address it must put in the global offset table, so + both the dynamic object and the regular object will refer to the + same memory location for the variable. + + Of course, if the symbol is sufficiently small, we must instead + allocate it in .sbss. FIXME: It would be better to do this if and + only if there were actually SDAREL relocs for that symbol. */ + + if (h->size <= elf_gp_size (htab->elf.dynobj)) + s = htab->dynsbss; + else + s = htab->dynbss; + BFD_ASSERT (s != NULL); + + /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to + copy the initial value out of the dynamic object and into the + runtime process image. We need to remember the offset into the + .rela.bss section we are going to use. */ + if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) + { + asection *srel; + + if (h->size <= elf_gp_size (htab->elf.dynobj)) + srel = htab->relsbss; + else + srel = htab->relbss; + BFD_ASSERT (srel != NULL); + srel->size += sizeof (Elf32_External_Rela); + h->needs_copy = 1; + } - if (local_got_refcounts == NULL) - { - bfd_size_type size = symtab_hdr->sh_info; + /* We need to figure out the alignment required for this symbol. I + have no idea how ELF linkers handle this. */ + power_of_two = bfd_log2 (h->size); + if (power_of_two > 4) + power_of_two = 4; - size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks); - local_got_refcounts = bfd_zalloc (abfd, size); - if (local_got_refcounts == NULL) + /* Apply the required alignment. */ + s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); + if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) + { + if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) return FALSE; - elf_local_got_refcounts (abfd) = local_got_refcounts; } - local_got_refcounts[r_symndx] += 1; - local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info); - local_got_tls_masks[r_symndx] |= tls_type; - return TRUE; -} + /* Define the symbol as being at this point in the section. */ + h->root.u.def.section = s; + h->root.u.def.value = s->size; -static void -bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) -{ - (*_bfd_error_handler) - (_("%B: relocation %s cannot be used when making a shared object"), - abfd, - ppc_elf_howto_table[r_type]->name); - bfd_set_error (bfd_error_bad_value); -} + /* Increment the section size to make room for the symbol. */ + s->size += h->size; -/* Look through the relocs for a section during the first phase, and - allocate space in the global offset table or procedure linkage - table. */ + return TRUE; +} + +/* Allocate space in associated reloc sections for dynamic relocs. */ static bfd_boolean -ppc_elf_check_relocs (bfd *abfd, - struct bfd_link_info *info, - asection *sec, - const Elf_Internal_Rela *relocs) +allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) { + struct bfd_link_info *info = inf; + struct ppc_elf_link_hash_entry *eh; struct ppc_elf_link_hash_table *htab; - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - const Elf_Internal_Rela *rel; - const Elf_Internal_Rela *rel_end; - asection *sreloc; + struct ppc_elf_dyn_relocs *p; - if (info->relocatable) + if (h->root.type == bfd_link_hash_indirect) return TRUE; -#ifdef DEBUG - _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", - sec, abfd); -#endif - - /* Initialize howto table if not already done. */ - if (!ppc_elf_howto_table[R_PPC_ADDR32]) - ppc_elf_howto_init (); + if (h->root.type == bfd_link_hash_warning) + /* When warning symbols are created, they **replace** the "real" + entry in the hash table, thus we never get to see the real + symbol in a hash traversal. So look at it now. */ + h = (struct elf_link_hash_entry *) h->root.u.i.link; - /* Create the linker generated sections all the time so that the - special symbols are created. */ htab = ppc_elf_hash_table (info); - if (htab->sdata == NULL) - { - htab->sdata = ppc_elf_create_linker_section (abfd, info, - LINKER_SECTION_SDATA); - if (htab->sdata == NULL) - return FALSE; - } - - if (htab->sdata2 == NULL) - { - htab->sdata2 = ppc_elf_create_linker_section (abfd, info, - LINKER_SECTION_SDATA2); - if (htab->sdata2 == NULL) - return FALSE; - } - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - sreloc = NULL; - - rel_end = relocs + sec->reloc_count; - for (rel = relocs; rel < rel_end; rel++) + if (htab->elf.dynamic_sections_created + && h->plt.refcount > 0) { - unsigned long r_symndx; - enum elf_ppc_reloc_type r_type; - struct elf_link_hash_entry *h; - int tls_type = 0; - - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx < symtab_hdr->sh_info) - h = NULL; - else - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - - /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. - This shows up in particular in an R_PPC_ADDR32 in the eabi - startup code. */ - if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + /* Make sure this symbol is output as a dynamic symbol. */ + if (h->dynindx == -1 + && !h->forced_local) { - if (htab->got == NULL) - { - if (htab->elf.dynobj == NULL) - htab->elf.dynobj = abfd; - if (!ppc_elf_create_got (htab->elf.dynobj, info)) - return FALSE; - } + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; } - r_type = ELF32_R_TYPE (rel->r_info); - switch (r_type) + if (info->shared + || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) { - case R_PPC_GOT_TLSLD16: - case R_PPC_GOT_TLSLD16_LO: - case R_PPC_GOT_TLSLD16_HI: - case R_PPC_GOT_TLSLD16_HA: - htab->tlsld_got.refcount += 1; - tls_type = TLS_TLS | TLS_LD; - goto dogottls; - - case R_PPC_GOT_TLSGD16: - case R_PPC_GOT_TLSGD16_LO: - case R_PPC_GOT_TLSGD16_HI: - case R_PPC_GOT_TLSGD16_HA: - tls_type = TLS_TLS | TLS_GD; - goto dogottls; + asection *s = htab->plt; - case R_PPC_GOT_TPREL16: - case R_PPC_GOT_TPREL16_LO: - case R_PPC_GOT_TPREL16_HI: - case R_PPC_GOT_TPREL16_HA: - if (info->shared) - info->flags |= DF_STATIC_TLS; - tls_type = TLS_TLS | TLS_TPREL; - goto dogottls; + /* If this is the first .plt entry, make room for the special + first entry. */ + if (s->size == 0) + s->size += PLT_INITIAL_ENTRY_SIZE; - case R_PPC_GOT_DTPREL16: - case R_PPC_GOT_DTPREL16_LO: - case R_PPC_GOT_DTPREL16_HI: - case R_PPC_GOT_DTPREL16_HA: - tls_type = TLS_TLS | TLS_DTPREL; - dogottls: - sec->has_tls_reloc = 1; - /* Fall thru */ + /* The PowerPC PLT is actually composed of two parts, the + first part is 2 words (for a load and a jump), and then + there is a remaining word available at the end. */ + h->plt.offset = (PLT_INITIAL_ENTRY_SIZE + + (PLT_SLOT_SIZE + * ((s->size - PLT_INITIAL_ENTRY_SIZE) + / PLT_ENTRY_SIZE))); - /* GOT16 relocations */ - case R_PPC_GOT16: - case R_PPC_GOT16_LO: - case R_PPC_GOT16_HI: - case R_PPC_GOT16_HA: - /* This symbol requires a global offset table entry. */ - if (htab->got == NULL) - { - if (htab->elf.dynobj == NULL) - htab->elf.dynobj = abfd; - if (!ppc_elf_create_got (htab->elf.dynobj, info)) - return FALSE; - } - if (h != NULL) + /* If this symbol is not defined in a regular file, and we + are not generating a shared library, then set the symbol + to this location in the .plt. This is required to make + function pointers compare as equal between the normal + executable and the shared library. */ + if (! info->shared + && !h->def_regular) { - h->got.refcount += 1; - ppc_elf_hash_entry (h)->tls_mask |= tls_type; + h->root.u.def.section = s; + h->root.u.def.value = h->plt.offset; } - else - /* This is a global offset table entry for a local symbol. */ - if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) - return FALSE; - break; - /* Indirect .sdata relocation. */ - case R_PPC_EMB_SDAI16: - if (info->shared) - { - bad_shared_reloc (abfd, r_type); - return FALSE; - } - if (!elf_create_pointer_linker_section (abfd, info, - htab->sdata, h, rel)) + /* Make room for this entry. After the 8192nd entry, room + for two entries is allocated. */ + s->size += PLT_ENTRY_SIZE; + if ((s->size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE + > PLT_NUM_SINGLE_ENTRIES) + s->size += PLT_ENTRY_SIZE; + + /* We also need to make an entry in the .rela.plt section. */ + htab->relplt->size += sizeof (Elf32_External_Rela); + } + else + { + h->plt.offset = (bfd_vma) -1; + h->needs_plt = 0; + } + } + else + { + h->plt.offset = (bfd_vma) -1; + h->needs_plt = 0; + } + + eh = (struct ppc_elf_link_hash_entry *) h; + if (eh->elf.got.refcount > 0) + { + /* Make sure this symbol is output as a dynamic symbol. */ + if (eh->elf.dynindx == -1 + && !eh->elf.forced_local) + { + if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) return FALSE; - break; + } - /* Indirect .sdata2 relocation. */ - case R_PPC_EMB_SDA2I16: - if (info->shared) + if (eh->tls_mask == (TLS_TLS | TLS_LD) + && !eh->elf.def_dynamic) + /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */ + eh->elf.got.offset = (bfd_vma) -1; + else + { + bfd_boolean dyn; + eh->elf.got.offset = htab->got->size; + if ((eh->tls_mask & TLS_TLS) != 0) { - bad_shared_reloc (abfd, r_type); - return FALSE; + if ((eh->tls_mask & TLS_LD) != 0) + htab->got->size += 8; + if ((eh->tls_mask & TLS_GD) != 0) + htab->got->size += 8; + if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) + htab->got->size += 4; + if ((eh->tls_mask & TLS_DTPREL) != 0) + htab->got->size += 4; } - if (!elf_create_pointer_linker_section (abfd, info, - htab->sdata2, h, rel)) - return FALSE; - break; - - case R_PPC_SDAREL16: - case R_PPC_EMB_SDA2REL: - case R_PPC_EMB_SDA21: - case R_PPC_EMB_RELSDA: - case R_PPC_EMB_NADDR32: - case R_PPC_EMB_NADDR16: - case R_PPC_EMB_NADDR16_LO: - case R_PPC_EMB_NADDR16_HI: - case R_PPC_EMB_NADDR16_HA: - if (info->shared) + else + htab->got->size += 4; + dyn = htab->elf.dynamic_sections_created; + if ((info->shared + || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) + && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT + || eh->elf.root.type != bfd_link_hash_undefweak)) { - bad_shared_reloc (abfd, r_type); - return FALSE; + /* All the entries we allocated need relocs. */ + htab->relgot->size + += ((htab->got->size - eh->elf.got.offset) / 4 + * sizeof (Elf32_External_Rela)); + /* Except LD only needs one. */ + if ((eh->tls_mask & TLS_LD) != 0) + htab->relgot->size -= sizeof (Elf32_External_Rela); } - break; + } + } + else + eh->elf.got.offset = (bfd_vma) -1; - case R_PPC_PLT32: - case R_PPC_PLTREL24: - case R_PPC_PLTREL32: - case R_PPC_PLT16_LO: - case R_PPC_PLT16_HI: - case R_PPC_PLT16_HA: -#ifdef DEBUG - fprintf (stderr, "Reloc requires a PLT entry\n"); -#endif - /* This symbol requires a procedure linkage table entry. We - actually build the entry in finish_dynamic_symbol, - because this might be a case of linking PIC code without - linking in any dynamic objects, in which case we don't - need to generate a procedure linkage table after all. */ + if (eh->dyn_relocs == NULL) + return TRUE; - if (h == NULL) + /* In the shared -Bsymbolic case, discard space allocated for + dynamic pc-relative relocs against symbols which turn out to be + defined in regular objects. For the normal shared case, discard + space for relocs that have become local due to symbol visibility + changes. */ + + if (info->shared) + { + /* Relocs that use pc_count are those that appear on a call insn, + or certain REL relocs (see MUST_BE_DYN_RELOC) that can be + generated via assembly. We want calls to protected symbols to + resolve directly to the function rather than going via the plt. + If people want function pointer comparisons to work as expected + then they should avoid writing weird assembly. */ + if (SYMBOL_CALLS_LOCAL (info, h)) + { + struct ppc_elf_dyn_relocs **pp; + + for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) { - /* It does not make sense to have a procedure linkage - table entry for a local symbol. */ - (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against " - "local symbol"), - abfd, - sec, - (long) rel->r_offset, - ppc_elf_howto_table[r_type]->name); - bfd_set_error (bfd_error_bad_value); - return FALSE; + p->count -= p->pc_count; + p->pc_count = 0; + if (p->count == 0) + *pp = p->next; + else + pp = &p->next; } + } - h->needs_plt = 1; - h->plt.refcount++; - break; - - /* The following relocations don't need to propagate the - relocation if linking a shared object since they are - section relative. */ - case R_PPC_SECTOFF: - case R_PPC_SECTOFF_LO: - case R_PPC_SECTOFF_HI: - case R_PPC_SECTOFF_HA: - case R_PPC_DTPREL16: - case R_PPC_DTPREL16_LO: - case R_PPC_DTPREL16_HI: - case R_PPC_DTPREL16_HA: - case R_PPC_TOC16: - break; + /* Also discard relocs on undefined weak syms with non-default + visibility. */ + if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + && h->root.type == bfd_link_hash_undefweak) + eh->dyn_relocs = NULL; - /* This are just markers. */ - case R_PPC_TLS: - case R_PPC_EMB_MRKREF: - case R_PPC_NONE: - case R_PPC_max: - break; + /* Make sure undefined weak symbols are output as a dynamic symbol + in PIEs. */ + if (info->pie + && eh->dyn_relocs != NULL + && h->dynindx == -1 + && h->root.type == bfd_link_hash_undefweak + && !h->forced_local) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + } + else if (ELIMINATE_COPY_RELOCS) + { + /* For the non-shared case, discard space for relocs against + symbols which turn out to need copy relocs or are not + dynamic. */ - /* These should only appear in dynamic objects. */ - case R_PPC_COPY: - case R_PPC_GLOB_DAT: - case R_PPC_JMP_SLOT: - case R_PPC_RELATIVE: - break; + if (!h->non_got_ref + && h->def_dynamic + && !h->def_regular) + { + /* Make sure this symbol is output as a dynamic symbol. + Undefined weak syms won't yet be marked as dynamic. */ + if (h->dynindx == -1 + && !h->forced_local) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } - /* These aren't handled yet. We'll report an error later. */ - case R_PPC_ADDR30: - case R_PPC_EMB_RELSEC16: - case R_PPC_EMB_RELST_LO: - case R_PPC_EMB_RELST_HI: - case R_PPC_EMB_RELST_HA: - case R_PPC_EMB_BIT_FLD: - break; + /* If that succeeded, we know we'll be keeping all the + relocs. */ + if (h->dynindx != -1) + goto keep; + } - /* This refers only to functions defined in the shared library. */ - case R_PPC_LOCAL24PC: - break; + eh->dyn_relocs = NULL; - /* This relocation describes the C++ object vtable hierarchy. - Reconstruct it for later use during GC. */ - case R_PPC_GNU_VTINHERIT: - if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) - return FALSE; - break; + keep: ; + } - /* This relocation describes which C++ vtable entries are actually - used. Record for later use during GC. */ - case R_PPC_GNU_VTENTRY: - if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) - return FALSE; - break; + /* Finally, allocate space. */ + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + asection *sreloc = elf_section_data (p->sec)->sreloc; + sreloc->size += p->count * sizeof (Elf32_External_Rela); + } - /* We shouldn't really be seeing these. */ - case R_PPC_TPREL32: - if (info->shared) - info->flags |= DF_STATIC_TLS; - goto dodyn; + return TRUE; +} - /* Nor these. */ - case R_PPC_DTPMOD32: - case R_PPC_DTPREL32: - goto dodyn; +/* Find any dynamic relocs that apply to read-only sections. */ - case R_PPC_TPREL16: - case R_PPC_TPREL16_LO: - case R_PPC_TPREL16_HI: - case R_PPC_TPREL16_HA: - if (info->shared) - info->flags |= DF_STATIC_TLS; - goto dodyn; +static bfd_boolean +readonly_dynrelocs (struct elf_link_hash_entry *h, void *info) +{ + struct ppc_elf_dyn_relocs *p; - /* When creating a shared object, we must copy these - relocs into the output file. We create a reloc - section in dynobj and make room for the reloc. */ - case R_PPC_REL24: - case R_PPC_REL14: - case R_PPC_REL14_BRTAKEN: - case R_PPC_REL14_BRNTAKEN: - case R_PPC_REL32: - if (h == NULL - || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) - break; - /* fall through */ + if (h->root.type == bfd_link_hash_indirect) + return TRUE; - case R_PPC_ADDR32: - case R_PPC_ADDR24: - case R_PPC_ADDR16: - case R_PPC_ADDR16_LO: - case R_PPC_ADDR16_HI: - case R_PPC_ADDR16_HA: - case R_PPC_ADDR14: - case R_PPC_ADDR14_BRTAKEN: - case R_PPC_ADDR14_BRNTAKEN: - case R_PPC_UADDR32: - case R_PPC_UADDR16: - if (h != NULL && !info->shared) - { - /* We may need a plt entry if the symbol turns out to be - a function defined in a dynamic object. */ - h->plt.refcount++; + if (h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; - /* We may need a copy reloc too. */ - h->non_got_ref = 1; - } + for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) + { + asection *s = p->sec->output_section; - dodyn: - /* If we are creating a shared library, and this is a reloc - against a global symbol, or a non PC relative reloc - against a local symbol, then we need to copy the reloc - into the shared library. However, if we are linking with - -Bsymbolic, we do not need to copy a reloc against a - global symbol which is defined in an object we are - including in the link (i.e., DEF_REGULAR is set). At - this point we have not seen all the input files, so it is - possible that DEF_REGULAR is not set now but will be set - later (it is never cleared). In case of a weak definition, - DEF_REGULAR may be cleared later by a strong definition in - a shared library. We account for that possibility below by - storing information in the dyn_relocs field of the hash - table entry. A similar situation occurs when creating - shared libraries and symbol visibility changes render the - symbol local. + if (s != NULL + && ((s->flags & (SEC_READONLY | SEC_ALLOC)) + == (SEC_READONLY | SEC_ALLOC))) + { + ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; - If on the other hand, we are creating an executable, we - may need to keep relocations for symbols satisfied by a - dynamic library if we manage to avoid copy relocs for the - symbol. */ - if ((info->shared - && (MUST_BE_DYN_RELOC (r_type) - || (h != NULL - && (! info->symbolic - || h->root.type == bfd_link_hash_defweak - || !h->def_regular)))) - || (ELIMINATE_COPY_RELOCS - && !info->shared - && (sec->flags & SEC_ALLOC) != 0 - && h != NULL - && (h->root.type == bfd_link_hash_defweak - || !h->def_regular))) - { - struct ppc_elf_dyn_relocs *p; - struct ppc_elf_dyn_relocs **head; + /* Not an error, just cut short the traversal. */ + return FALSE; + } + } + return TRUE; +} + +/* Set the sizes of the dynamic sections. */ + +static bfd_boolean +ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + struct ppc_elf_link_hash_table *htab; + asection *s; + bfd_boolean relocs; + bfd *ibfd; #ifdef DEBUG - fprintf (stderr, - "ppc_elf_check_relocs needs to " - "create relocation for %s\n", - (h && h->root.root.string - ? h->root.root.string : "")); + fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); #endif - if (sreloc == NULL) - { - const char *name; - name = (bfd_elf_string_from_elf_section - (abfd, - elf_elfheader (abfd)->e_shstrndx, - elf_section_data (sec)->rel_hdr.sh_name)); - if (name == NULL) - return FALSE; + htab = ppc_elf_hash_table (info); + BFD_ASSERT (htab->elf.dynobj != NULL); - BFD_ASSERT (strncmp (name, ".rela", 5) == 0 - && strcmp (bfd_get_section_name (abfd, sec), - name + 5) == 0); + 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 (htab->elf.dynobj, ".interp"); + BFD_ASSERT (s != NULL); + s->size = sizeof ELF_DYNAMIC_INTERPRETER; + s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; + } + } - sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); - if (sreloc == NULL) - { - flagword flags; + if (htab->tlsld_got.refcount > 0) + { + htab->tlsld_got.offset = htab->got->size; + htab->got->size += 8; + if (info->shared) + htab->relgot->size += sizeof (Elf32_External_Rela); + } + else + htab->tlsld_got.offset = (bfd_vma) -1; - sreloc = bfd_make_section (htab->elf.dynobj, name); - flags = (SEC_HAS_CONTENTS | SEC_READONLY - | SEC_IN_MEMORY | SEC_LINKER_CREATED); - if ((sec->flags & SEC_ALLOC) != 0) - flags |= SEC_ALLOC | SEC_LOAD; - if (sreloc == NULL - || ! bfd_set_section_flags (htab->elf.dynobj, - sreloc, flags) - || ! bfd_set_section_alignment (htab->elf.dynobj, - sreloc, 2)) - return FALSE; - } - elf_section_data (sec)->sreloc = sreloc; - } + /* Set up .got offsets for local syms, and space for local dynamic + relocs. */ + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + bfd_signed_vma *local_got; + bfd_signed_vma *end_local_got; + char *lgot_masks; + bfd_size_type locsymcount; + Elf_Internal_Shdr *symtab_hdr; + asection *srel; - /* If this is a global symbol, we count the number of - relocations we need for this symbol. */ - if (h != NULL) - { - head = &ppc_elf_hash_entry (h)->dyn_relocs; - } - else - { - /* Track dynamic relocs needed for local syms too. - We really need local syms available to do this - easily. Oh well. */ + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) + continue; - asection *s; - s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, - sec, r_symndx); - if (s == NULL) - return FALSE; + for (s = ibfd->sections; s != NULL; s = s->next) + { + struct ppc_elf_dyn_relocs *p; - head = ((struct ppc_elf_dyn_relocs **) - &elf_section_data (s)->local_dynrel); + for (p = ((struct ppc_elf_dyn_relocs *) + elf_section_data (s)->local_dynrel); + p != NULL; + p = p->next) + { + if (!bfd_is_abs_section (p->sec) + && bfd_is_abs_section (p->sec->output_section)) + { + /* Input section has been discarded, either because + it is a copy of a linkonce section or due to + linker script /DISCARD/, so we'll be discarding + the relocs too. */ } - - p = *head; - if (p == NULL || p->sec != sec) + else if (p->count != 0) { - p = bfd_alloc (htab->elf.dynobj, sizeof *p); - if (p == NULL) - return FALSE; - p->next = *head; - *head = p; - p->sec = sec; - p->count = 0; - p->pc_count = 0; + elf_section_data (p->sec)->sreloc->size + += p->count * sizeof (Elf32_External_Rela); + if ((p->sec->output_section->flags + & (SEC_READONLY | SEC_ALLOC)) + == (SEC_READONLY | SEC_ALLOC)) + info->flags |= DF_TEXTREL; } - - p->count += 1; - if (!MUST_BE_DYN_RELOC (r_type)) - p->pc_count += 1; } - - break; } - } - return TRUE; -} + local_got = elf_local_got_refcounts (ibfd); + if (!local_got) + continue; -/* Return the section that should be marked against GC for a given - relocation. */ + symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; + locsymcount = symtab_hdr->sh_info; + end_local_got = local_got + locsymcount; + lgot_masks = (char *) end_local_got; + s = htab->got; + srel = htab->relgot; + for (; local_got < end_local_got; ++local_got, ++lgot_masks) + if (*local_got > 0) + { + if (*lgot_masks == (TLS_TLS | TLS_LD)) + { + /* If just an LD reloc, we'll just use + htab->tlsld_got.offset. */ + if (htab->tlsld_got.offset == (bfd_vma) -1) + { + htab->tlsld_got.offset = s->size; + s->size += 8; + if (info->shared) + srel->size += sizeof (Elf32_External_Rela); + } + *local_got = (bfd_vma) -1; + } + else + { + *local_got = s->size; + if ((*lgot_masks & TLS_TLS) != 0) + { + if ((*lgot_masks & TLS_GD) != 0) + s->size += 8; + if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) + s->size += 4; + if ((*lgot_masks & TLS_DTPREL) != 0) + s->size += 4; + } + else + s->size += 4; + if (info->shared) + srel->size += ((s->size - *local_got) / 4 + * sizeof (Elf32_External_Rela)); + } + } + else + *local_got = (bfd_vma) -1; + } -static asection * -ppc_elf_gc_mark_hook (asection *sec, - struct bfd_link_info *info ATTRIBUTE_UNUSED, - Elf_Internal_Rela *rel, - struct elf_link_hash_entry *h, - Elf_Internal_Sym *sym) -{ - if (h != NULL) + /* Allocate space for global sym dynamic relocs. */ + elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); + + /* We've now determined the sizes of the various dynamic sections. + Allocate memory for them. */ + relocs = FALSE; + for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) { - switch (ELF32_R_TYPE (rel->r_info)) - { - case R_PPC_GNU_VTINHERIT: - case R_PPC_GNU_VTENTRY: - break; + if ((s->flags & SEC_LINKER_CREATED) == 0) + continue; - default: - switch (h->root.type) + if (s == htab->plt + || s == htab->got) + { + /* Strip this section if we don't need it; see the + comment below. */ + } + else if ((htab->sdata != NULL && s == htab->sdata->section) + || (htab->sdata2 != NULL && s == htab->sdata2->section)) + { + if (s->size == 0) + /* Don't strip these sections. We need them because they + define _SDA_BASE_ and _SDA2_BASE_. crt1.o makes a + reference to _SDA_BASE_ to set up r13. */ + continue; + } + else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) + { + if (s->size == 0) { - case bfd_link_hash_defined: - case bfd_link_hash_defweak: - return h->root.u.def.section; - - case bfd_link_hash_common: - return h->root.u.c.p->section; + /* If we don't need this section, strip it from the + output file. This is mostly to handle .rela.bss and + .rela.plt. We must create both sections in + create_dynamic_sections, because they 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. */ + } + else + { + /* Remember whether there are any relocation sections. */ + relocs = TRUE; - default: - break; + /* We use the reloc_count field as a counter if we need + to copy relocs into the output file. */ + s->reloc_count = 0; } } - } - else - return bfd_section_from_elf_index (sec->owner, sym->st_shndx); - - return NULL; -} - -/* Update the got, plt and dynamic reloc reference counts for the - section being removed. */ - -static bfd_boolean -ppc_elf_gc_sweep_hook (bfd *abfd, - struct bfd_link_info *info, - asection *sec, - const Elf_Internal_Rela *relocs) -{ - struct ppc_elf_link_hash_table *htab; - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - bfd_signed_vma *local_got_refcounts; - const Elf_Internal_Rela *rel, *relend; + else + { + /* It's not one of our sections, so don't allocate space. */ + continue; + } - elf_section_data (sec)->local_dynrel = NULL; + if (s->size == 0) + { + _bfd_strip_section_from_output (info, s); + continue; + } - htab = ppc_elf_hash_table (info); - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - local_got_refcounts = elf_local_got_refcounts (abfd); + /* Allocate memory for the section contents. */ + s->contents = bfd_zalloc (htab->elf.dynobj, s->size); + if (s->contents == NULL) + return FALSE; + } - relend = relocs + sec->reloc_count; - for (rel = relocs; rel < relend; rel++) + if (htab->elf.dynamic_sections_created) { - unsigned long r_symndx; - enum elf_ppc_reloc_type r_type; - struct elf_link_hash_entry *h = NULL; + /* Add some entries to the .dynamic section. We fill in the + values later, in ppc_elf_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) - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) + if (info->executable) { - struct ppc_elf_dyn_relocs **pp, *p; - struct ppc_elf_link_hash_entry *eh; - - 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; - eh = (struct ppc_elf_link_hash_entry *) h; - - for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) - if (p->sec == sec) - { - /* Everything must go for SEC. */ - *pp = p->next; - break; - } + if (!add_dynamic_entry (DT_DEBUG, 0)) + return FALSE; } - r_type = ELF32_R_TYPE (rel->r_info); - switch (r_type) + if (htab->plt != NULL && htab->plt->size != 0) { - case R_PPC_GOT_TLSLD16: - case R_PPC_GOT_TLSLD16_LO: - case R_PPC_GOT_TLSLD16_HI: - case R_PPC_GOT_TLSLD16_HA: - htab->tlsld_got.refcount -= 1; - /* Fall thru */ - - case R_PPC_GOT_TLSGD16: - case R_PPC_GOT_TLSGD16_LO: - case R_PPC_GOT_TLSGD16_HI: - case R_PPC_GOT_TLSGD16_HA: - case R_PPC_GOT_TPREL16: - case R_PPC_GOT_TPREL16_LO: - case R_PPC_GOT_TPREL16_HI: - case R_PPC_GOT_TPREL16_HA: - case R_PPC_GOT_DTPREL16: - case R_PPC_GOT_DTPREL16_LO: - case R_PPC_GOT_DTPREL16_HI: - case R_PPC_GOT_DTPREL16_HA: - case R_PPC_GOT16: - case R_PPC_GOT16_LO: - case R_PPC_GOT16_HI: - case R_PPC_GOT16_HA: - if (h != NULL) - { - if (h->got.refcount > 0) - h->got.refcount--; - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - local_got_refcounts[r_symndx]--; - } - break; + 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; + } - case R_PPC_REL24: - case R_PPC_REL14: - case R_PPC_REL14_BRTAKEN: - case R_PPC_REL14_BRNTAKEN: - case R_PPC_REL32: - if (h == NULL - || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) - break; - /* Fall thru */ + if (relocs) + { + if (!add_dynamic_entry (DT_RELA, 0) + || !add_dynamic_entry (DT_RELASZ, 0) + || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) + return FALSE; + } - case R_PPC_ADDR32: - case R_PPC_ADDR24: - case R_PPC_ADDR16: - case R_PPC_ADDR16_LO: - case R_PPC_ADDR16_HI: - case R_PPC_ADDR16_HA: - case R_PPC_ADDR14: - case R_PPC_ADDR14_BRTAKEN: - case R_PPC_ADDR14_BRNTAKEN: - case R_PPC_UADDR32: - case R_PPC_UADDR16: - case R_PPC_PLT32: - case R_PPC_PLTREL24: - case R_PPC_PLT16_LO: - case R_PPC_PLT16_HI: - case R_PPC_PLT16_HA: - if (h != NULL) - { - if (h->plt.refcount > 0) - h->plt.refcount--; - } - break; + /* If any dynamic relocs apply to a read-only section, then we + need a DT_TEXTREL entry. */ + if ((info->flags & DF_TEXTREL) == 0) + elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs, + info); - default: - break; + if ((info->flags & DF_TEXTREL) != 0) + { + if (!add_dynamic_entry (DT_TEXTREL, 0)) + return FALSE; } } +#undef add_dynamic_entry + return TRUE; } + +#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) + +static const int shared_stub_entry[] = + { + 0x7c0802a6, /* mflr 0 */ + 0x429f0005, /* bcl 20, 31, .Lxxx */ + 0x7d6802a6, /* mflr 11 */ + 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */ + 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */ + 0x7c0803a6, /* mtlr 0 */ + 0x7d6903a6, /* mtctr 11 */ + 0x4e800420, /* bctr */ + }; + +static const int stub_entry[] = + { + 0x3d600000, /* lis 11,xxx@ha */ + 0x396b0000, /* addi 11,11,xxx@l */ + 0x7d6903a6, /* mtctr 11 */ + 0x4e800420, /* bctr */ + }; + +static bfd_boolean +ppc_elf_relax_section (bfd *abfd, + asection *isec, + struct bfd_link_info *link_info, + bfd_boolean *again) +{ + struct one_fixup + { + struct one_fixup *next; + asection *tsec; + bfd_vma toff; + bfd_vma trampoff; + }; -/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ + Elf_Internal_Shdr *symtab_hdr; + bfd_byte *contents = NULL; + Elf_Internal_Sym *isymbuf = NULL; + Elf_Internal_Rela *internal_relocs = NULL; + Elf_Internal_Rela *irel, *irelend; + struct one_fixup *fixups = NULL; + bfd_boolean changed; + struct ppc_elf_link_hash_table *ppc_info; + bfd_size_type trampoff; -asection * -ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) -{ - struct ppc_elf_link_hash_table *htab; + *again = FALSE; - htab = ppc_elf_hash_table (info); - htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", - FALSE, FALSE, TRUE); + /* Nothing to do if there are no relocations. */ + if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0) + return TRUE; - return _bfd_elf_tls_setup (obfd, info); -} + trampoff = (isec->size + 3) & (bfd_vma) -4; + /* Space for a branch around any trampolines. */ + trampoff += 4; -/* Run through all the TLS relocs looking for optimization - opportunities. */ + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; -bfd_boolean -ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, - struct bfd_link_info *info) -{ - bfd *ibfd; - asection *sec; - struct ppc_elf_link_hash_table *htab; + /* Get a copy of the native relocations. */ + internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, + link_info->keep_memory); + if (internal_relocs == NULL) + goto error_return; - if (info->relocatable || info->shared) - return TRUE; + ppc_info = ppc_elf_hash_table (link_info); + irelend = internal_relocs + isec->reloc_count; - htab = ppc_elf_hash_table (info); - for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + for (irel = internal_relocs; irel < irelend; irel++) { - Elf_Internal_Sym *locsyms = NULL; - Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; + unsigned long r_type = ELF32_R_TYPE (irel->r_info); + bfd_vma symaddr, reladdr, toff, roff; + asection *tsec; + struct one_fixup *f; + size_t insn_offset = 0; + bfd_vma max_branch_offset, val; + bfd_byte *hit_addr; + unsigned long t0; + unsigned char sym_type; - for (sec = ibfd->sections; sec != NULL; sec = sec->next) - if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) - { - Elf_Internal_Rela *relstart, *rel, *relend; - int expecting_tls_get_addr; + switch (r_type) + { + case R_PPC_REL24: + case R_PPC_LOCAL24PC: + case R_PPC_PLTREL24: + max_branch_offset = 1 << 25; + break; - /* Read the relocations. */ - relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, - info->keep_memory); - if (relstart == NULL) - return FALSE; + case R_PPC_REL14: + case R_PPC_REL14_BRTAKEN: + case R_PPC_REL14_BRNTAKEN: + max_branch_offset = 1 << 15; + break; - expecting_tls_get_addr = 0; - relend = relstart + sec->reloc_count; - for (rel = relstart; rel < relend; rel++) - { - enum elf_ppc_reloc_type r_type; - unsigned long r_symndx; - struct elf_link_hash_entry *h = NULL; - char *tls_mask; - char tls_set, tls_clear; - bfd_boolean is_local; + default: + continue; + } - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - struct elf_link_hash_entry **sym_hashes; + /* Get the value of the symbol referred to by the reloc. */ + if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) + { + /* A local symbol. */ + Elf_Internal_Sym *isym; - sym_hashes = elf_sym_hashes (ibfd); - 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; - } + /* 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 == 0) + goto error_return; + } + isym = isymbuf + ELF32_R_SYM (irel->r_info); + if (isym->st_shndx == SHN_UNDEF) + continue; /* We can't do anything with undefined symbols. */ + else if (isym->st_shndx == SHN_ABS) + tsec = bfd_abs_section_ptr; + else if (isym->st_shndx == SHN_COMMON) + tsec = bfd_com_section_ptr; + else + tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); - is_local = FALSE; - if (h == NULL - || !h->def_dynamic) - is_local = TRUE; + toff = isym->st_value; + sym_type = ELF_ST_TYPE (isym->st_info); + } + else + { + /* Global symbol handling. */ + unsigned long indx; + struct elf_link_hash_entry *h; - r_type = ELF32_R_TYPE (rel->r_info); - switch (r_type) - { - case R_PPC_GOT_TLSLD16: - case R_PPC_GOT_TLSLD16_LO: - case R_PPC_GOT_TLSLD16_HI: - case R_PPC_GOT_TLSLD16_HA: - /* These relocs should never be against a symbol - defined in a shared lib. Leave them alone if - that turns out to be the case. */ - expecting_tls_get_addr = 0; - htab->tlsld_got.refcount -= 1; - if (!is_local) - continue; + indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; + h = elf_sym_hashes (abfd)[indx]; - /* LD -> LE */ - tls_set = 0; - tls_clear = TLS_LD; - expecting_tls_get_addr = 1; - break; + 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; - case R_PPC_GOT_TLSGD16: - case R_PPC_GOT_TLSGD16_LO: - case R_PPC_GOT_TLSGD16_HI: - case R_PPC_GOT_TLSGD16_HA: - if (is_local) - /* GD -> LE */ - tls_set = 0; - else - /* GD -> IE */ - tls_set = TLS_TLS | TLS_TPRELGD; - tls_clear = TLS_GD; - expecting_tls_get_addr = 1; - break; + if (r_type == R_PPC_PLTREL24 + && ppc_info->plt != NULL + && h->plt.offset != (bfd_vma) -1) + { + tsec = ppc_info->plt; + toff = h->plt.offset; + } + else if (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + { + tsec = h->root.u.def.section; + toff = h->root.u.def.value; + } + else + continue; - case R_PPC_GOT_TPREL16: - case R_PPC_GOT_TPREL16_LO: - case R_PPC_GOT_TPREL16_HI: - case R_PPC_GOT_TPREL16_HA: - expecting_tls_get_addr = 0; - if (is_local) - { - /* IE -> LE */ - tls_set = 0; - tls_clear = TLS_TPREL; - break; - } - else - continue; + sym_type = h->type; + } - case R_PPC_REL14: - case R_PPC_REL14_BRTAKEN: - case R_PPC_REL14_BRNTAKEN: - case R_PPC_REL24: - if (expecting_tls_get_addr - && h != NULL - && h == htab->tls_get_addr) - { - if (h->plt.refcount > 0) - h->plt.refcount -= 1; - } - expecting_tls_get_addr = 0; - continue; + /* If the branch and target are in the same section, you have + no hope of adding stubs. We'll error out later should the + branch overflow. */ + if (tsec == isec) + continue; + + /* There probably isn't any reason to handle symbols in + SEC_MERGE sections; SEC_MERGE doesn't seem a likely + attribute for a code section, and we are only looking at + branches. However, implement it correctly here as a + reference for other target relax_section functions. */ + if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE) + { + /* At this stage in linking, no SEC_MERGE symbol has been + adjusted, so all references to such symbols need to be + passed through _bfd_merged_section_offset. (Later, in + relocate_section, all SEC_MERGE symbols *except* for + section symbols have been adjusted.) + + gas may reduce relocations against symbols in SEC_MERGE + sections to a relocation against the section symbol when + the original addend was zero. When the reloc is against + a section symbol we should include the addend in the + offset passed to _bfd_merged_section_offset, since the + location of interest is the original symbol. On the + other hand, an access to "sym+addend" where "sym" is not + a section symbol should not include the addend; Such an + access is presumed to be an offset from "sym"; The + location of interest is just "sym". */ + if (sym_type == STT_SECTION) + toff += irel->r_addend; - default: - expecting_tls_get_addr = 0; - continue; - } + toff = _bfd_merged_section_offset (abfd, &tsec, + elf_section_data (tsec)->sec_info, + toff); - if (h != NULL) - { - if (tls_set == 0) - { - /* We managed to get rid of a got entry. */ - if (h->got.refcount > 0) - h->got.refcount -= 1; - } - tls_mask = &ppc_elf_hash_entry (h)->tls_mask; - } - else - { - Elf_Internal_Sym *sym; - bfd_signed_vma *lgot_refs; - char *lgot_masks; + if (sym_type != STT_SECTION) + toff += irel->r_addend; + } + else + toff += irel->r_addend; - if (locsyms == NULL) - { - locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; - if (locsyms == NULL) - locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, - symtab_hdr->sh_info, - 0, NULL, NULL, NULL); - if (locsyms == NULL) - { - if (elf_section_data (sec)->relocs != relstart) - free (relstart); - return FALSE; - } - } - sym = locsyms + r_symndx; - lgot_refs = elf_local_got_refcounts (ibfd); - if (lgot_refs == NULL) - abort (); - if (tls_set == 0) - { - /* We managed to get rid of a got entry. */ - if (lgot_refs[r_symndx] > 0) - lgot_refs[r_symndx] -= 1; - } - lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info); - tls_mask = &lgot_masks[r_symndx]; - } + symaddr = tsec->output_section->vma + tsec->output_offset + toff; - *tls_mask |= tls_set; - *tls_mask &= ~tls_clear; - } + roff = irel->r_offset; + reladdr = isec->output_section->vma + isec->output_offset + roff; - if (elf_section_data (sec)->relocs != relstart) - free (relstart); - } + /* If the branch is in range, no need to do anything. */ + if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset) + continue; - if (locsyms != NULL - && (symtab_hdr->contents != (unsigned char *) locsyms)) + /* Look for an existing fixup to this address. */ + for (f = fixups; f ; f = f->next) + if (f->tsec == tsec && f->toff == toff) + break; + + if (f == NULL) { - if (!info->keep_memory) - free (locsyms); - else - symtab_hdr->contents = (unsigned char *) locsyms; - } - } - return TRUE; -} - -/* 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. */ + size_t size; + unsigned long stub_rtype; -static bfd_boolean -ppc_elf_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) -{ - if (sym->st_shndx == SHN_COMMON - && !info->relocatable - && sym->st_size <= elf_gp_size (abfd) - && (info->hash->creator == abfd->xvec - || info->hash->creator == abfd->xvec->alternative_target)) - { - /* Common symbols less than or equal to -G nn bytes are automatically - put into .sbss. */ - struct ppc_elf_link_hash_table *htab; + val = trampoff - roff; + if (val >= max_branch_offset) + /* Oh dear, we can't reach a trampoline. Don't try to add + one. We'll report an error later. */ + continue; - htab = ppc_elf_hash_table (info); - if (htab->sbss == NULL) - { - flagword flags = SEC_IS_COMMON; + if (link_info->shared) + { + size = 4 * ARRAY_SIZE (shared_stub_entry); + insn_offset = 12; + stub_rtype = R_PPC_RELAX32PC; + } + else + { + size = 4 * ARRAY_SIZE (stub_entry); + insn_offset = 0; + stub_rtype = R_PPC_RELAX32; + } - htab->sbss = bfd_make_section_anyway (abfd, ".sbss"); - if (htab->sbss == NULL - || ! bfd_set_section_flags (abfd, htab->sbss, flags)) - return FALSE; - } + if (R_PPC_RELAX32_PLT - R_PPC_RELAX32 + != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC) + abort (); + if (tsec == ppc_info->plt) + stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32; - *secp = htab->sbss; - *valp = sym->st_size; - } + /* Hijack the old relocation. Since we need two + relocations for this use a "composite" reloc. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + stub_rtype); + irel->r_offset = trampoff + insn_offset; - return TRUE; -} - -/* Finish up dynamic symbol handling. We set the contents of various - dynamic sections here. */ + /* Record the fixup so we don't do it again this section. */ + f = bfd_malloc (sizeof (*f)); + f->next = fixups; + f->tsec = tsec; + f->toff = toff; + f->trampoff = trampoff; + fixups = f; -static bfd_boolean -ppc_elf_finish_dynamic_symbol (bfd *output_bfd, - struct bfd_link_info *info, - struct elf_link_hash_entry *h, - Elf_Internal_Sym *sym) -{ - struct ppc_elf_link_hash_table *htab; + trampoff += size; + } + else + { + val = f->trampoff - roff; + if (val >= max_branch_offset) + continue; -#ifdef DEBUG - fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", - h->root.root.string); -#endif + /* Nop out the reloc, since we're finalizing things here. */ + irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); + } - htab = ppc_elf_hash_table (info); - BFD_ASSERT (htab->elf.dynobj != NULL); + /* Get the section contents. */ + if (contents == NULL) + { + /* Get cached copy if it exists. */ + if (elf_section_data (isec)->this_hdr.contents != NULL) + contents = elf_section_data (isec)->this_hdr.contents; + else + { + /* Go get them off disk. */ + if (!bfd_malloc_and_get_section (abfd, isec, &contents)) + goto error_return; + } + } - if (h->plt.offset != (bfd_vma) -1) - { - Elf_Internal_Rela rela; - bfd_byte *loc; - bfd_vma reloc_index; + /* Fix up the existing branch to hit the trampoline. */ + hit_addr = contents + roff; + switch (r_type) + { + case R_PPC_REL24: + case R_PPC_LOCAL24PC: + case R_PPC_PLTREL24: + t0 = bfd_get_32 (abfd, hit_addr); + t0 &= ~0x3fffffc; + t0 |= val & 0x3fffffc; + bfd_put_32 (abfd, t0, hit_addr); + break; -#ifdef DEBUG - fprintf (stderr, ", plt_offset = %d", h->plt.offset); -#endif + case R_PPC_REL14: + case R_PPC_REL14_BRTAKEN: + case R_PPC_REL14_BRNTAKEN: + t0 = bfd_get_32 (abfd, hit_addr); + t0 &= ~0xfffc; + t0 |= val & 0xfffc; + bfd_put_32 (abfd, t0, hit_addr); + break; + } + } - /* This symbol has an entry in the procedure linkage table. Set - it up. */ + /* Write out the trampolines. */ + changed = fixups != NULL; + if (fixups != NULL) + { + const int *stub; + bfd_byte *dest; + bfd_vma val; + int i, size; - BFD_ASSERT (h->dynindx != -1); - BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL); + do + { + struct one_fixup *f = fixups; + fixups = fixups->next; + free (f); + } + while (fixups); - /* We don't need to fill in the .plt. The ppc dynamic linker - will fill it in. */ + contents = bfd_realloc (contents, trampoff); + if (contents == NULL) + goto error_return; - /* Fill in the entry in the .rela.plt section. */ - rela.r_offset = (htab->plt->output_section->vma - + htab->plt->output_offset - + h->plt.offset); - rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); - rela.r_addend = 0; + isec->size = (isec->size + 3) & (bfd_vma) -4; + /* Branch around the trampolines. */ + val = trampoff - isec->size + 0x48000000; + dest = contents + isec->size; + isec->size = trampoff; + bfd_put_32 (abfd, val, dest); + dest += 4; - reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE; - if (reloc_index > PLT_NUM_SINGLE_ENTRIES) - reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; - loc = (htab->relplt->contents - + reloc_index * sizeof (Elf32_External_Rela)); - bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); + if (link_info->shared) + { + stub = shared_stub_entry; + size = ARRAY_SIZE (shared_stub_entry); + } + else + { + stub = stub_entry; + size = ARRAY_SIZE (stub_entry); + } - if (!h->def_regular) + i = 0; + while (dest < contents + trampoff) { - /* Mark the symbol as undefined, rather than as defined in - the .plt section. Leave the value alone. */ - sym->st_shndx = SHN_UNDEF; - /* If the symbol is weak, we do need to clear the value. - Otherwise, the PLT entry would provide a definition for - the symbol even if the symbol wasn't defined anywhere, - and so the symbol would never be NULL. */ - if (!h->ref_regular_nonweak) - sym->st_value = 0; + bfd_put_32 (abfd, stub[i], dest); + i++; + if (i == size) + i = 0; + dest += 4; } + BFD_ASSERT (i == 0); } - if (h->needs_copy) + if (isymbuf != NULL + && symtab_hdr->contents != (unsigned char *) isymbuf) { - asection *s; - Elf_Internal_Rela rela; - bfd_byte *loc; - - /* This symbols needs a copy reloc. Set it up. */ - -#ifdef DEBUG - fprintf (stderr, ", copy"); -#endif - - BFD_ASSERT (h->dynindx != -1); - - if (h->size <= elf_gp_size (htab->elf.dynobj)) - s = htab->relsbss; + if (! link_info->keep_memory) + free (isymbuf); else - s = htab->relbss; - BFD_ASSERT (s != NULL); - - rela.r_offset = (h->root.u.def.value - + h->root.u.def.section->output_section->vma - + h->root.u.def.section->output_offset); - rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); - rela.r_addend = 0; - loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); + { + /* Cache the symbols for elf_link_input_bfd. */ + symtab_hdr->contents = (unsigned char *) isymbuf; + } } -#ifdef DEBUG - fprintf (stderr, "\n"); -#endif + if (contents != NULL + && elf_section_data (isec)->this_hdr.contents != contents) + { + if (!changed && !link_info->keep_memory) + free (contents); + else + { + /* Cache the section contents for elf_link_input_bfd. */ + elf_section_data (isec)->this_hdr.contents = contents; + } + } - /* 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) - sym->st_shndx = SHN_ABS; + if (elf_section_data (isec)->relocs != internal_relocs) + { + if (!changed) + free (internal_relocs); + else + elf_section_data (isec)->relocs = internal_relocs; + } + *again = changed; return TRUE; + + error_return: + if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) + free (isymbuf); + if (contents != NULL + && elf_section_data (isec)->this_hdr.contents != contents) + free (contents); + if (internal_relocs != NULL + && elf_section_data (isec)->relocs != internal_relocs) + free (internal_relocs); + return FALSE; } -/* Finish up the dynamic sections. */ +#define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR) -static bfd_boolean -ppc_elf_finish_dynamic_sections (bfd *output_bfd, - struct bfd_link_info *info) -{ - asection *sdyn; - struct ppc_elf_link_hash_table *htab; +/* Fill in the address for a pointer generated in a linker section. */ -#ifdef DEBUG - fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); -#endif +static bfd_vma +elf_finish_pointer_linker_section (bfd *output_bfd, + bfd *input_bfd, + struct bfd_link_info *info, + elf_linker_section_t *lsect, + struct elf_link_hash_entry *h, + bfd_vma relocation, + const Elf_Internal_Rela *rel, + int relative_reloc) +{ + elf_linker_section_pointers_t *linker_section_ptr; - htab = ppc_elf_hash_table (info); - sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic"); + BFD_ASSERT (lsect != NULL); - if (htab->elf.dynamic_sections_created) + if (h != NULL) { - Elf32_External_Dyn *dyncon, *dynconend; + /* Handle global symbol. */ + struct ppc_elf_link_hash_entry *eh; - BFD_ASSERT (htab->plt != NULL && sdyn != NULL); + eh = (struct ppc_elf_link_hash_entry *) h; + linker_section_ptr + = elf_find_pointer_linker_section (eh->linker_section_pointer, + rel->r_addend, + lsect); - dyncon = (Elf32_External_Dyn *) sdyn->contents; - dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); - for (; dyncon < dynconend; dyncon++) + BFD_ASSERT (linker_section_ptr != NULL); + + if (! elf_hash_table (info)->dynamic_sections_created + || (info->shared + && info->symbolic + && h->def_regular)) { - Elf_Internal_Dyn dyn; - asection *s; + /* This is actually a static link, or it is a + -Bsymbolic link and the symbol is defined + locally. We must initialize this entry in the + global section. - bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn); + When doing a dynamic link, we create a .rela. + relocation entry to initialize the value. This + is done in the finish_dynamic_symbol routine. */ + if (!linker_section_ptr->written_address_p) + { + linker_section_ptr->written_address_p = TRUE; + bfd_put_ptr (output_bfd, + relocation + linker_section_ptr->addend, + (lsect->section->contents + + linker_section_ptr->offset)); + } + } + } + else + { + /* Handle local symbol. */ + unsigned long r_symndx = ELF32_R_SYM (rel->r_info); + BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); + BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL); + linker_section_ptr = (elf_find_pointer_linker_section + (elf_local_ptr_offsets (input_bfd)[r_symndx], + rel->r_addend, + lsect)); - switch (dyn.d_tag) + BFD_ASSERT (linker_section_ptr != NULL); + + /* Write out pointer if it hasn't been rewritten out before. */ + if (!linker_section_ptr->written_address_p) + { + linker_section_ptr->written_address_p = TRUE; + bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, + lsect->section->contents + linker_section_ptr->offset); + + if (info->shared) { - case DT_PLTGOT: - s = htab->plt; - dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; - break; + /* We need to generate a relative reloc for the dynamic + linker. */ - case DT_PLTRELSZ: - dyn.d_un.d_val = htab->relplt->size; - break; + asection *srel = lsect->rel_section; + Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL]; + bfd_byte *erel; + const struct elf_backend_data *bed; + unsigned int i; - case DT_JMPREL: - s = htab->relplt; - dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; - break; + BFD_ASSERT (srel != NULL); - default: - continue; + bed = get_elf_backend_data (output_bfd); + for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) + { + outrel[i].r_offset = (lsect->section->output_section->vma + + lsect->section->output_offset + + linker_section_ptr->offset); + outrel[i].r_info = 0; + outrel[i].r_addend = 0; + } + outrel[0].r_info = ELF32_R_INFO (0, relative_reloc); + erel = lsect->section->contents; + erel += (elf_section_data (lsect->section)->rel_count++ + * sizeof (Elf32_External_Rela)); + bfd_elf32_swap_reloca_out (output_bfd, outrel, erel); } - - bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); } } - /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can - easily find the address of the _GLOBAL_OFFSET_TABLE_. */ - if (htab->got) - { - unsigned char *contents = htab->got->contents; - bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents); - - if (sdyn == NULL) - bfd_put_32 (output_bfd, 0, contents + 4); - else - bfd_put_32 (output_bfd, - sdyn->output_section->vma + sdyn->output_offset, - contents + 4); + relocation = (lsect->section->output_offset + + linker_section_ptr->offset + - lsect->sym_offset); - elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; - } +#ifdef DEBUG + fprintf (stderr, + "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", + lsect->name, (long) relocation, (long) relocation); +#endif - return TRUE; + /* Subtract out the addend, because it will get added back in by the normal + processing. */ + return relocation - linker_section_ptr->addend; } - + /* The RELOCATE_SECTION function is called by the ELF backend linker to handle the relocations for a section. @@ -5769,398 +5963,207 @@ ppc_elf_relocate_section (bfd *output_bfd, return ret; } - -static enum elf_reloc_type_class -ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela) -{ - switch (ELF32_R_TYPE (rela->r_info)) - { - case R_PPC_RELATIVE: - return reloc_class_relative; - case R_PPC_REL24: - case R_PPC_ADDR24: - case R_PPC_JMP_SLOT: - return reloc_class_plt; - case R_PPC_COPY: - return reloc_class_copy; - default: - return reloc_class_normal; - } -} -/* Support for core dump NOTE sections. */ - -static bfd_boolean -ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) -{ - int offset; - unsigned int size; - - switch (note->descsz) - { - default: - return FALSE; - - case 268: /* Linux/PPC. */ - /* pr_cursig */ - elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); - - /* pr_pid */ - elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); - - /* pr_reg */ - offset = 72; - size = 192; - - break; - } - - /* Make a ".reg/999" section. */ - return _bfd_elfcore_make_pseudosection (abfd, ".reg", - size, note->descpos + offset); -} +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ static bfd_boolean -ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) -{ - switch (note->descsz) - { - default: - return FALSE; - - case 128: /* Linux/PPC elf_prpsinfo. */ - elf_tdata (abfd)->core_program - = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); - elf_tdata (abfd)->core_command - = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); - } - - /* Note that for some reason, a spurious space is tacked - onto the end of the args in some (at least one anyway) - implementations, so strip it off if it exists. */ - - { - char *command = elf_tdata (abfd)->core_command; - int n = strlen (command); - - if (0 < n && command[n - 1] == ' ') - command[n - 1] = '\0'; - } - - return TRUE; -} - -/* Very simple linked list structure for recording apuinfo values. */ -typedef struct apuinfo_list -{ - struct apuinfo_list *next; - unsigned long value; -} -apuinfo_list; - -static apuinfo_list *head; - - -static void -apuinfo_list_init (void) -{ - head = NULL; -} - -static void -apuinfo_list_add (unsigned long value) -{ - apuinfo_list *entry = head; - - while (entry != NULL) - { - if (entry->value == value) - return; - entry = entry->next; - } - - entry = bfd_malloc (sizeof (* entry)); - if (entry == NULL) - return; - - entry->value = value; - entry->next = head; - head = entry; -} - -static unsigned -apuinfo_list_length (void) -{ - apuinfo_list *entry; - unsigned long count; - - for (entry = head, count = 0; - entry; - entry = entry->next) - ++ count; - - return count; -} - -static inline unsigned long -apuinfo_list_element (unsigned long number) -{ - apuinfo_list * entry; - - for (entry = head; - entry && number --; - entry = entry->next) - ; - - return entry ? entry->value : 0; -} - -static void -apuinfo_list_finish (void) -{ - apuinfo_list *entry; - - for (entry = head; entry;) - { - apuinfo_list *next = entry->next; - free (entry); - entry = next; - } - - head = NULL; -} - -#define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" -#define APUINFO_LABEL "APUinfo" - -/* Scan the input BFDs and create a linked list of - the APUinfo values that will need to be emitted. */ - -static void -ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) +ppc_elf_finish_dynamic_symbol (bfd *output_bfd, + struct bfd_link_info *info, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) { - bfd *ibfd; - asection *asec; - char *buffer; - unsigned num_input_sections; - bfd_size_type output_section_size; - unsigned i; - unsigned num_entries; - unsigned long offset; - unsigned long length; - const char *error_message = NULL; - - if (link_info == NULL) - return; - - /* Scan the input bfds, looking for apuinfo sections. */ - num_input_sections = 0; - output_section_size = 0; - - for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) - { - asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); - if (asec) - { - ++ num_input_sections; - output_section_size += asec->size; - } - } - - /* We need at least one input sections - in order to make merging worthwhile. */ - if (num_input_sections < 1) - return; - - /* Just make sure that the output section exists as well. */ - asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); - if (asec == NULL) - return; + struct ppc_elf_link_hash_table *htab; - /* Allocate a buffer for the contents of the input sections. */ - buffer = bfd_malloc (output_section_size); - if (buffer == NULL) - return; +#ifdef DEBUG + fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", + h->root.root.string); +#endif - offset = 0; - apuinfo_list_init (); + htab = ppc_elf_hash_table (info); + BFD_ASSERT (htab->elf.dynobj != NULL); - /* Read in the input sections contents. */ - for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) + if (h->plt.offset != (bfd_vma) -1) { - unsigned long datum; - char *ptr; - - asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); - if (asec == NULL) - continue; - - length = asec->size; - if (length < 24) - { - error_message = _("corrupt or empty %s section in %B"); - goto fail; - } - - if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 - || (bfd_bread (buffer + offset, length, ibfd) != length)) - { - error_message = _("unable to read in %s section from %B"); - goto fail; - } - - /* Process the contents of the section. */ - ptr = buffer + offset; - error_message = _("corrupt %s section in %B"); + Elf_Internal_Rela rela; + bfd_byte *loc; + bfd_vma reloc_index; - /* Verify the contents of the header. Note - we have to - extract the values this way in order to allow for a - host whose endian-ness is different from the target. */ - datum = bfd_get_32 (ibfd, ptr); - if (datum != sizeof APUINFO_LABEL) - goto fail; +#ifdef DEBUG + fprintf (stderr, ", plt_offset = %d", h->plt.offset); +#endif - datum = bfd_get_32 (ibfd, ptr + 8); - if (datum != 0x2) - goto fail; + /* This symbol has an entry in the procedure linkage table. Set + it up. */ - if (strcmp (ptr + 12, APUINFO_LABEL) != 0) - goto fail; + BFD_ASSERT (h->dynindx != -1); + BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL); - /* Get the number of bytes used for apuinfo entries. */ - datum = bfd_get_32 (ibfd, ptr + 4); - if (datum + 20 != length) - goto fail; + /* We don't need to fill in the .plt. The ppc dynamic linker + will fill it in. */ - /* Make sure that we do not run off the end of the section. */ - if (offset + length > output_section_size) - goto fail; + /* Fill in the entry in the .rela.plt section. */ + rela.r_offset = (htab->plt->output_section->vma + + htab->plt->output_offset + + h->plt.offset); + rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); + rela.r_addend = 0; - /* Scan the apuinfo section, building a list of apuinfo numbers. */ - for (i = 0; i < datum; i += 4) - apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i)); + reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE; + if (reloc_index > PLT_NUM_SINGLE_ENTRIES) + reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; + loc = (htab->relplt->contents + + reloc_index * sizeof (Elf32_External_Rela)); + bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); - /* Update the offset. */ - offset += length; + if (!h->def_regular) + { + /* Mark the symbol as undefined, rather than as defined in + the .plt section. Leave the value alone. */ + sym->st_shndx = SHN_UNDEF; + /* If the symbol is weak, we do need to clear the value. + Otherwise, the PLT entry would provide a definition for + the symbol even if the symbol wasn't defined anywhere, + and so the symbol would never be NULL. */ + if (!h->ref_regular_nonweak) + sym->st_value = 0; + } } - error_message = NULL; + if (h->needs_copy) + { + asection *s; + Elf_Internal_Rela rela; + bfd_byte *loc; - /* Compute the size of the output section. */ - num_entries = apuinfo_list_length (); - output_section_size = 20 + num_entries * 4; + /* This symbols needs a copy reloc. Set it up. */ - asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); +#ifdef DEBUG + fprintf (stderr, ", copy"); +#endif - if (! bfd_set_section_size (abfd, asec, output_section_size)) - ibfd = abfd, - error_message = _("warning: unable to set size of %s section in %B"); + BFD_ASSERT (h->dynindx != -1); - fail: - free (buffer); + if (h->size <= elf_gp_size (htab->elf.dynobj)) + s = htab->relsbss; + else + s = htab->relbss; + BFD_ASSERT (s != NULL); - if (error_message) - (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); -} + rela.r_offset = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); + rela.r_addend = 0; + loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); + } +#ifdef DEBUG + fprintf (stderr, "\n"); +#endif -/* Prevent the output section from accumulating the input sections' - contents. We have already stored this in our linked list structure. */ + /* 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) + sym->st_shndx = SHN_ABS; -static bfd_boolean -ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, - asection *asec, - bfd_byte *contents ATTRIBUTE_UNUSED) + return TRUE; +} + +static enum elf_reloc_type_class +ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela) { - return (apuinfo_list_length () - && strcmp (asec->name, APUINFO_SECTION_NAME) == 0); + switch (ELF32_R_TYPE (rela->r_info)) + { + case R_PPC_RELATIVE: + return reloc_class_relative; + case R_PPC_REL24: + case R_PPC_ADDR24: + case R_PPC_JMP_SLOT: + return reloc_class_plt; + case R_PPC_COPY: + return reloc_class_copy; + default: + return reloc_class_normal; + } } + +/* Finish up the dynamic sections. */ - -/* Finally we can generate the output section. */ - -static void -ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) +static bfd_boolean +ppc_elf_finish_dynamic_sections (bfd *output_bfd, + struct bfd_link_info *info) { - bfd_byte *buffer; - asection *asec; - unsigned i; - unsigned num_entries; - bfd_size_type length; - - asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); - if (asec == NULL) - return; + asection *sdyn; + struct ppc_elf_link_hash_table *htab; - if (apuinfo_list_length () == 0) - return; +#ifdef DEBUG + fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); +#endif - length = asec->size; - if (length < 20) - return; + htab = ppc_elf_hash_table (info); + sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic"); - buffer = bfd_malloc (length); - if (buffer == NULL) + if (htab->elf.dynamic_sections_created) { - (*_bfd_error_handler) - (_("failed to allocate space for new APUinfo section.")); - return; - } + Elf32_External_Dyn *dyncon, *dynconend; - /* Create the apuinfo header. */ - num_entries = apuinfo_list_length (); - bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); - bfd_put_32 (abfd, num_entries * 4, buffer + 4); - bfd_put_32 (abfd, 0x2, buffer + 8); - strcpy ((char *) buffer + 12, APUINFO_LABEL); + BFD_ASSERT (htab->plt != NULL && sdyn != NULL); - length = 20; - for (i = 0; i < num_entries; i++) - { - bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); - length += 4; - } + dyncon = (Elf32_External_Dyn *) sdyn->contents; + dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); + for (; dyncon < dynconend; dyncon++) + { + Elf_Internal_Dyn dyn; + asection *s; - if (length != asec->size) - (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); + bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn); - if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) - (*_bfd_error_handler) (_("failed to install new APUinfo section.")); + switch (dyn.d_tag) + { + case DT_PLTGOT: + s = htab->plt; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; + break; - free (buffer); + case DT_PLTRELSZ: + dyn.d_un.d_val = htab->relplt->size; + break; - apuinfo_list_finish (); -} + case DT_JMPREL: + s = htab->relplt; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; + break; -/* Return address for Ith PLT stub in section PLT, for relocation REL - or (bfd_vma) -1 if it should not be included. */ + default: + continue; + } -static bfd_vma -ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, - const asection *plt ATTRIBUTE_UNUSED, - const arelent *rel) -{ - return rel->address; -} + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + } + } -/* Add extra PPC sections -- Note, for now, make .sbss2 and - .PPC.EMB.sbss0 a normal section, and not a bss section so - that the linker doesn't crater when trying to make more than - 2 sections. */ + /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can + easily find the address of the _GLOBAL_OFFSET_TABLE_. */ + if (htab->got) + { + unsigned char *contents = htab->got->contents; + bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents); -static struct bfd_elf_special_section const ppc_elf_special_sections[]= -{ - { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC }, - { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, - { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, - { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC }, - { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC }, - { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 }, - { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC }, - { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC }, - { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, - { NULL, 0, 0, 0, 0 } -}; + if (sdyn == NULL) + bfd_put_32 (output_bfd, 0, contents + 4); + else + bfd_put_32 (output_bfd, + sdyn->output_section->vma + sdyn->output_offset, + contents + 4); + + elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; + } + + return TRUE; +} #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec #define TARGET_LITTLE_NAME "elf32-powerpcle" -- 2.7.4