From: Geoffrey Keating Date: Mon, 16 Oct 2000 19:52:26 +0000 (+0000) Subject: * elf32-ppc.c (SYMBOL_REFERENCES_LOCAL): New macro. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e1e0340bc8a0bc235b4d1916df6b3eac9ce399de;p=binutils-gdb.git * elf32-ppc.c (SYMBOL_REFERENCES_LOCAL): New macro. (SYMBOL_CALLS_LOCAL): New macro. (ppc_elf_adjust_dynamic_symbol): Use SYMBOL_CALLS_LOCAL. (ppc_elf_check_relocs): Use SYMBOL_REFERENCES_LOCAL. (ppc_elf_finish_dynamic_symbol): Use SYMBOL_REFERENCES_LOCAL. (ppc_elf_relocate_section): Use flag variable to determine whether the relocation refers to a local symbol. Test whether a PLTREL24 reloc will produce a reloc by looking to see whether a PLT entry was made. --- diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 101c34f3d19..fa4a92e0682 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,15 @@ +2000-10-16 Geoffrey Keating + + * elf32-ppc.c (SYMBOL_REFERENCES_LOCAL): New macro. + (SYMBOL_CALLS_LOCAL): New macro. + (ppc_elf_adjust_dynamic_symbol): Use SYMBOL_CALLS_LOCAL. + (ppc_elf_check_relocs): Use SYMBOL_REFERENCES_LOCAL. + (ppc_elf_finish_dynamic_symbol): Use SYMBOL_REFERENCES_LOCAL. + (ppc_elf_relocate_section): Use flag variable to determine + whether the relocation refers to a local symbol. + Test whether a PLTREL24 reloc will produce a reloc by looking + to see whether a PLT entry was made. + 2000-10-14 Geoffrey Keating * elf32-ppc.c (ppc_elf_finish_dynamic_symbol): Don't make PLT diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c index c4d352becbd..55d2debdb2c 100644 --- a/bfd/elf32-ppc.c +++ b/bfd/elf32-ppc.c @@ -124,6 +124,23 @@ static boolean ppc_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_i /* The number of single-slot PLT entries (the rest use two slots). */ #define PLT_NUM_SINGLE_ENTRIES 8192 +/* Will references to this symbol always reference the symbol + in this object? */ +#define SYMBOL_REFERENCES_LOCAL(INFO, H) \ + ((! INFO->shared \ + || INFO->symbolic \ + || H->dynindx == -1 \ + || ELF_ST_VISIBILITY (H->other) == STV_INTERNAL \ + || ELF_ST_VISIBILITY (H->other) == STV_HIDDEN) \ + && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) + +/* Will _calls_ to this symbol always call the version in this object? */ +#define SYMBOL_CALLS_LOCAL(INFO, H) \ + ((! INFO->shared \ + || INFO->symbolic \ + || H->dynindx == -1 \ + || ELF_ST_VISIBILITY (H->other) != STV_DEFAULT) \ + && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) static reloc_howto_type *ppc_elf_howto_table[ (int)R_PPC_max ]; @@ -1703,9 +1720,7 @@ ppc_elf_adjust_dynamic_symbol (info, h) || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) { if (! elf_hash_table (info)->dynamic_sections_created - || ((!info->shared || info->symbolic || h->dynindx == -1) - && (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) != 0) + || SYMBOL_CALLS_LOCAL (info, h) || (info->shared && h->plt.refcount <= 0)) { /* A PLT entry is not required/allowed when: @@ -1713,10 +1728,8 @@ ppc_elf_adjust_dynamic_symbol (info, h) 1. We are not using ld.so; because then the PLT entry can't be set up, so we can't use one. - 2. We know for certain that a symbol is defined in - this object, because this object is the application, - is linked with -Bsymbolic, the symbol is local, - or because the symbol is protected or hidden. + 2. We know for certain that a call to this symbol + will go to this object. 3. GC has rendered the entry unused. Note, however, that in an executable all references to the @@ -2386,7 +2399,8 @@ ppc_elf_check_relocs (abfd, info, sec, relocs) case R_PPC_REL14_BRNTAKEN: case R_PPC_REL32: if (h == NULL - || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 + || SYMBOL_REFERENCES_LOCAL (info, h)) break; /* fall through */ @@ -2708,8 +2722,7 @@ ppc_elf_finish_dynamic_symbol (output_bfd, info, h, sym) the global offset table will already have been initialized in the relocate_section function. */ if (info->shared - && (info->symbolic || h->dynindx == -1) - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) + && SYMBOL_REFERENCES_LOCAL (info, h)) { rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); rela.r_addend = (h->root.u.def.value @@ -2952,6 +2965,7 @@ ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, reloc_howto_type *howto; unsigned long r_symndx; bfd_vma relocation; + int will_become_local; /* Unknown relocation handling */ if ((unsigned)r_type >= (unsigned)R_PPC_max || !ppc_elf_howto_table[(int)r_type]) @@ -3005,6 +3019,8 @@ ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, relocation = (sec->output_section->vma + sec->output_offset + sym->st_value); + /* Relocs to local symbols are always resolved. */ + will_become_local = 1; } else { @@ -3013,11 +3029,16 @@ ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, || h->root.type == bfd_link_hash_warning) h = (struct elf_link_hash_entry *) h->root.u.i.link; sym_name = h->root.root.string; + + /* Can this relocation be resolved immediately? */ + will_become_local = SYMBOL_REFERENCES_LOCAL (info, h); + if (h->root.type == bfd_link_hash_defined || h->root.type == bfd_link_hash_defweak) { sec = h->root.u.def.section; - if ((r_type == R_PPC_PLT32 + if (((r_type == R_PPC_PLT32 + || r_type == R_PPC_PLTREL24) && splt != NULL && h->plt.offset != (bfd_vma) -1) || (r_type == R_PPC_LOCAL24PC @@ -3027,14 +3048,9 @@ ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, || r_type == R_PPC_GOT16_HI || r_type == R_PPC_GOT16_HA) && elf_hash_table (info)->dynamic_sections_created - && (! info->shared - || (! info->symbolic && h->dynindx != -1) - || (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0)) + && (! info->shared || ! will_become_local)) || (info->shared - && ((! info->symbolic && h->dynindx != -1) - || (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0) + && ! will_become_local && ((input_section->flags & SEC_ALLOC) != 0 /* Testing SEC_DEBUGGING here may be wrong. It's here to avoid a crash when @@ -3052,7 +3068,6 @@ ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, || r_type == R_PPC_ADDR14 || r_type == R_PPC_ADDR14_BRTAKEN || r_type == R_PPC_ADDR14_BRNTAKEN - || r_type == R_PPC_PLTREL24 || r_type == R_PPC_COPY || r_type == R_PPC_GLOB_DAT || r_type == R_PPC_JMP_SLOT @@ -3100,8 +3115,7 @@ ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, } else if (h->root.type == bfd_link_hash_undefweak) relocation = 0; - else if (info->shared && !info->symbolic - && !info->no_undefined + else if (info->shared && !info->symbolic && !info->no_undefined && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) relocation = 0; else @@ -3158,7 +3172,8 @@ ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, /* If these relocations are not to a named symbol, they can be handled right here, no need to bother the dynamic linker. */ if (h == NULL - || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 + || SYMBOL_REFERENCES_LOCAL (info, h)) break; /* fall through */ @@ -3233,12 +3248,8 @@ ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, memset (&outrel, 0, sizeof outrel); /* h->dynindx may be -1 if this symbol was marked to become local. */ - else if (h != NULL - && ((! info->symbolic && h->dynindx != -1) - || (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0)) + else if (! will_become_local) { - BFD_ASSERT (h->dynindx != -1); outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); outrel.r_addend = rel->r_addend; } @@ -3359,8 +3370,7 @@ ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, if (! elf_hash_table (info)->dynamic_sections_created || (info->shared - && (info->symbolic || h->dynindx == -1) - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) + && SYMBOL_REFERENCES_LOCAL (info, h))) { /* This is actually a static link, or it is a -Bsymbolic link and the symbol is defined