From: Mark Mitchell Date: Sun, 27 Jun 1999 11:05:15 +0000 (+0000) Subject: * elf32-mips.c (mips_elf_swap_msym_in): New function. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c6142e5d05bb11f13b753c9045912effa27dd118;p=binutils-gdb.git * elf32-mips.c (mips_elf_swap_msym_in): New function. (mips_elf_swap_msym_out): New function. (mips_elf_create_msym_section): Likewise. (MIPS_ELF_MSYM_SECTION_NAME): New macro. (_bfd_mips_elf_final_write_processing): Set sh_link for .msym. (_bfd_mips_elf_section_from_shdr): Reject an SHT_MIPS_MSYM section not named .msym. (_bfd_mips_elf_fake_sections): Use MIPS_ELF_MSYM_SECTION_NAME, not .msym directly. Set appropriate attributes for the .msym section. (mips_elf_link_hash_entry): Add min_dyn_reloc_index field. (mips_elf_link_hash_newfunc): Clear it. (mips_elf_create_dynamic_sections): Create the .msym section on IRIX6. (mips_elf_size_dynamic_sections): Allocate space for the .msym section. Add a DT_MIPS_MSYM entry. (mips_elf_finish_dynamic_symbol): Write out a .msym entry for the symbol. (mips_elf_finish_dynamic_sections): Assign a value for DT_MIPS_MSYM. Add .msym entries for the section symbols as well. --- diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 1064c7793d8..e8c2f7d21f9 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,26 @@ 1999-06-26 Mark Mitchell + * elf32-mips.c (mips_elf_swap_msym_in): New function. + (mips_elf_swap_msym_out): New function. + (mips_elf_create_msym_section): Likewise. + (MIPS_ELF_MSYM_SECTION_NAME): New macro. + (_bfd_mips_elf_final_write_processing): Set sh_link for .msym. + (_bfd_mips_elf_section_from_shdr): Reject an SHT_MIPS_MSYM + section not named .msym. + (_bfd_mips_elf_fake_sections): Use MIPS_ELF_MSYM_SECTION_NAME, not + .msym directly. Set appropriate attributes for the .msym + section. + (mips_elf_link_hash_entry): Add min_dyn_reloc_index field. + (mips_elf_link_hash_newfunc): Clear it. + (mips_elf_create_dynamic_sections): Create the .msym section + on IRIX6. + (mips_elf_size_dynamic_sections): Allocate space for the + .msym section. Add a DT_MIPS_MSYM entry. + (mips_elf_finish_dynamic_symbol): Write out a .msym entry for + the symbol. + (mips_elf_finish_dynamic_sections): Assign a value for + DT_MIPS_MSYM. Add .msym entries for the section symbols as well. + * elf32-mips.c (irix_compat_t): New enumeration. (ABI_N32_P): New macro. (IRIX_COMPAT): Likewise. diff --git a/bfd/elf32-mips.c b/bfd/elf32-mips.c index c93f8029664..13e2d183e6d 100644 --- a/bfd/elf32-mips.c +++ b/bfd/elf32-mips.c @@ -53,6 +53,10 @@ static void bfd_mips_elf32_swap_gptab_in PARAMS ((bfd *, const Elf32_External_gptab *, Elf32_gptab *)); static void bfd_mips_elf32_swap_gptab_out PARAMS ((bfd *, const Elf32_gptab *, Elf32_External_gptab *)); +static void bfd_mips_elf_swap_msym_in + PARAMS ((bfd *, const Elf32_External_Msym *, Elf32_Internal_Msym *)); +static void bfd_mips_elf_swap_msym_out + PARAMS ((bfd *, const Elf32_Internal_Msym *, Elf32_External_Msym *)); static boolean mips_elf_sym_is_global PARAMS ((bfd *, asymbol *)); static boolean mips_elf32_object_p PARAMS ((bfd *)); static boolean mips_elf_create_procedure_table @@ -124,6 +128,8 @@ static bfd_reloc_status_type mips_elf_final_gp static bfd_byte *elf32_mips_get_relocated_section_contents PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, bfd_byte *, boolean, asymbol **)); +static asection *mips_elf_create_msym_section + PARAMS ((bfd *)); /* The level of IRIX compatibility we're striving for. */ @@ -163,6 +169,9 @@ struct mips_got_info unsigned int assigned_gotno; }; +/* The name of the msym section. */ +#define MIPS_ELF_MSYM_SECTION_NAME(abfd) ".msym" + /* The number of local .got entries we reserve. */ #define MIPS_RESERVED_GOTNO (2) @@ -1932,6 +1941,31 @@ bfd_mips_elf_swap_options_out (abfd, in, ex) bfd_h_put_16 (abfd, in->section, ex->section); bfd_h_put_32 (abfd, in->info, ex->info); } + +/* Swap in an MSYM entry. */ + +static void +bfd_mips_elf_swap_msym_in (abfd, ex, in) + bfd *abfd; + const Elf32_External_Msym *ex; + Elf32_Internal_Msym *in; +{ + in->ms_hash_value = bfd_h_get_32 (abfd, ex->ms_hash_value); + in->ms_info = bfd_h_get_32 (abfd, ex->ms_info); +} + +/* Swap out an MSYM entry. */ + +static void +bfd_mips_elf_swap_msym_out (abfd, in, ex) + bfd *abfd; + const Elf32_Internal_Msym *in; + Elf32_External_Msym *ex; +{ + bfd_h_put_32 (abfd, in->ms_hash_value, ex->ms_hash_value); + bfd_h_put_32 (abfd, in->ms_info, ex->ms_info); +} + /* Determine whether a symbol is global for the purposes of splitting the symbol table into global symbols and local symbols. At least @@ -2042,6 +2076,7 @@ _bfd_mips_elf_final_write_processing (abfd, linker) { switch ((*hdrpp)->sh_type) { + case SHT_MIPS_MSYM: case SHT_MIPS_LIBLIST: sec = bfd_get_section_by_name (abfd, ".dynstr"); if (sec != NULL) @@ -2381,7 +2416,7 @@ _bfd_mips_elf_section_from_shdr (abfd, hdr, name) return false; break; case SHT_MIPS_MSYM: - if (strcmp (name, ".msym") != 0) + if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (abfd)) != 0) return false; break; case SHT_MIPS_CONFLICT: @@ -2546,7 +2581,7 @@ _bfd_mips_elf_fake_sections (abfd, hdr, sec) hdr->sh_info = sec->_raw_size / sizeof (Elf32_Lib); /* The sh_link field is set in final_write_processing. */ } - else if (strcmp (name, ".msym") == 0) + else if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (abfd)) == 0) { hdr->sh_type = SHT_MIPS_MSYM; hdr->sh_entsize = 8; @@ -2633,6 +2668,12 @@ _bfd_mips_elf_fake_sections (abfd, hdr, sec) hdr->sh_flags |= SHF_MIPS_NOSTRIP; /* The sh_link field is set in final_write_processing. */ } + else if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (abfd)) == 0) + { + hdr->sh_type = SHT_MIPS_MSYM; + hdr->sh_flags |= SHF_ALLOC; + hdr->sh_entsize = 8; + } return true; } @@ -3441,6 +3482,10 @@ struct mips_elf_link_hash_entry /* Number of MIPS_32 or MIPS_REL32 relocs against this symbol. */ unsigned int mips_32_relocs; + /* The index of the first dynamic relocation (in the .rel.dyn + section) against this symbol. */ + unsigned int min_dyn_reloc_index; + /* If there is a stub that 32 bit functions should use to call this 16 bit function, this points to the section containing the stub. */ asection *fn_stub; @@ -3536,6 +3581,7 @@ mips_elf_link_hash_newfunc (entry, table, string) not been set. -1 means there is no associated ifd. */ ret->esym.ifd = -2; ret->mips_32_relocs = 0; + ret->min_dyn_reloc_index = 0; ret->fn_stub = NULL; ret->need_fn_stub = false; ret->call_stub = NULL; @@ -5800,6 +5846,13 @@ mips_elf_create_dynamic_sections (abfd, info) if (! mips_elf_create_got_section (abfd, info)) return false; + /* Create the .msym section on IRIX6. It is used by the dynamic + linker to speed up dynamic relocations, and to avoid computing + the ELF hash for symbols. */ + if (IRIX_COMPAT (abfd) == ict_irix6 + && !mips_elf_create_msym_section (abfd)) + return false; + /* Create .stub section. */ if (bfd_get_section_by_name (abfd, ".stub") == NULL) { @@ -5998,6 +6051,33 @@ mips_elf_create_got_section (abfd, info) return true; } +/* Returns the .msym section for ABFD, creating it if it does not + already exist. Returns NULL to indicate error. */ + +static asection * +mips_elf_create_msym_section (abfd) + bfd *abfd; +{ + asection *s; + + s = bfd_get_section_by_name (abfd, MIPS_ELF_MSYM_SECTION_NAME (abfd)); + if (!s) + { + s = bfd_make_section (abfd, MIPS_ELF_MSYM_SECTION_NAME (abfd)); + if (!s + || !bfd_set_section_flags (abfd, s, + SEC_ALLOC + | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_LINKER_CREATED + | SEC_READONLY) + || !bfd_set_section_alignment (abfd, s, 2)) + return NULL; + } + + return s; +} + /* Look through the relocs for a section during the first phase, and allocate space in the global offset table. */ @@ -6868,6 +6948,11 @@ mips_elf_size_dynamic_sections (output_bfd, info) else if (SGI_COMPAT (output_bfd) && strncmp (name, ".compact_rel", 12) == 0) s->_raw_size += mips_elf_hash_table (info)->compact_rel_size; + else if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (output_bfd)) + == 0) + s->_raw_size = (sizeof (Elf32_External_Msym) + * (elf_hash_table (info)->dynsymcount + + bfd_count_sections (output_bfd))); else if (strncmp (name, ".init", 5) != 0) { /* It's not one of our sections, so don't allocate space. */ @@ -6999,6 +7084,11 @@ mips_elf_size_dynamic_sections (output_bfd, info) if (! bfd_elf32_add_dynamic_entry (info, DT_FINI, 0)) return false; #endif + + if (bfd_get_section_by_name (dynobj, + MIPS_ELF_MSYM_SECTION_NAME (dynobj)) + && !bfd_elf32_add_dynamic_entry (info, DT_MIPS_MSYM, 0)) + return false; } /* If we use dynamic linking, we generate a section symbol for each @@ -7111,11 +7201,14 @@ mips_elf_finish_dynamic_symbol (output_bfd, info, h, sym) bfd *dynobj; bfd_vma gval; asection *sgot; + asection *smsym; struct mips_got_info *g; const char *name; + struct mips_elf_link_hash_entry *mh; dynobj = elf_hash_table (info)->dynobj; gval = sym->st_value; + mh = (struct mips_elf_link_hash_entry *) h; if (h->plt.offset != (bfd_vma) -1) { @@ -7182,6 +7275,22 @@ mips_elf_finish_dynamic_symbol (output_bfd, info, h, sym) } } + /* Create a .msym entry, if appropriate. */ + smsym = bfd_get_section_by_name (dynobj, + MIPS_ELF_MSYM_SECTION_NAME (dynobj)); + if (smsym) + { + Elf32_Internal_Msym msym; + + msym.ms_hash_value = bfd_elf_hash (h->root.root.string); + /* It is undocumented what the `1' indicates, but IRIX6 uses + this value. */ + msym.ms_info = ELF32_MS_INFO (mh->min_dyn_reloc_index, 1); + bfd_mips_elf_swap_msym_out + (dynobj, &msym, + ((Elf32_External_Msym *) smsym->contents) + h->dynindx); + } + /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ name = h->root.root.string; if (strcmp (name, "_DYNAMIC") == 0 @@ -7428,6 +7537,12 @@ mips_elf_finish_dynamic_sections (output_bfd, info) bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); break; + case DT_MIPS_MSYM: + s = (bfd_get_section_by_name + (output_bfd, MIPS_ELF_MSYM_SECTION_NAME (output_bfd))); + dyn.d_un.d_ptr = s->vma; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; } } } @@ -7446,6 +7561,7 @@ mips_elf_finish_dynamic_sections (output_bfd, info) { asection *sdynsym; + asection *smsym; asection *s; Elf_Internal_Sym sym; Elf32_compact_rel cpt; @@ -7454,6 +7570,8 @@ mips_elf_finish_dynamic_sections (output_bfd, info) the STT_NOTYPE attribute for these symbols. Should we do so? */ sdynsym = bfd_get_section_by_name (dynobj, ".dynsym"); + smsym = bfd_get_section_by_name (dynobj, + MIPS_ELF_MSYM_SECTION_NAME (dynobj)); if (sdynsym != NULL) { #if 0 @@ -7512,25 +7630,39 @@ mips_elf_finish_dynamic_sections (output_bfd, info) else #endif /* 0 */ { + Elf32_Internal_Msym msym; + sym.st_size = 0; sym.st_name = 0; sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); sym.st_other = 0; + msym.ms_hash_value = 0; + msym.ms_info = ELF32_MS_INFO (0, 1); + for (s = output_bfd->sections; s != NULL; s = s->next) { int indx; + long dynindx; sym.st_value = s->vma; indx = elf_section_data (s)->this_idx; BFD_ASSERT (indx > 0); sym.st_shndx = indx; - - bfd_elf32_swap_symbol_out (output_bfd, &sym, - (((Elf32_External_Sym *) - sdynsym->contents) - + elf_section_data (s)->dynindx)); + + dynindx = elf_section_data (s)->dynindx; + + bfd_elf32_swap_symbol_out + (output_bfd, &sym, + (((Elf32_External_Sym *) sdynsym->contents) + + dynindx)); + + if (smsym) + bfd_mips_elf_swap_msym_out + (output_bfd, &msym, + (((Elf32_External_Msym *) smsym->contents) + + dynindx)); } /* Set the sh_info field of the output .dynsym section to