From 97b639ba817fa1ac5baba5b9e917d6b40c241dbc Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Wed, 6 Aug 2003 12:23:37 +0000 Subject: [PATCH] * elf64-ppc.c (ppc_stub_name): Tweak names for better readability. (ppc64_elf_adjust_dynamic_symbol): Allow copy relocs against function descriptors, but warn. (ppc_build_one_stub): Remove a couple of vars. Move code creating stub syms so that we can avoid a stub sym if we already have a plt sym. Do not redefine an existing symbol. (ppc64_elf_build_stubs): When --emit-stub-syms, print a symbol for glink. --- bfd/ChangeLog | 11 +++++ bfd/elf64-ppc.c | 116 ++++++++++++++++++++++++++++++------------------ 2 files changed, 84 insertions(+), 43 deletions(-) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 37ac8109813..b3ec7cbaf2a 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,14 @@ +2003-08-06 Alan Modra + + * elf64-ppc.c (ppc_stub_name): Tweak names for better readability. + (ppc64_elf_adjust_dynamic_symbol): Allow copy relocs against + function descriptors, but warn. + (ppc_build_one_stub): Remove a couple of vars. Move code creating + stub syms so that we can avoid a stub sym if we already have a + plt sym. Do not redefine an existing symbol. + (ppc64_elf_build_stubs): When --emit-stub-syms, print a symbol for + glink. + 2003-08-06 Nick Clifton * po/fr.po: Updated French translation. diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c index 50cb5d878a9..d9f04a5acff 100644 --- a/bfd/elf64-ppc.c +++ b/bfd/elf64-ppc.c @@ -3036,7 +3036,7 @@ ppc_stub_name (const asection *input_section, stub_name = bfd_malloc (len); if (stub_name != NULL) { - sprintf (stub_name, "%08x_%s+%x", + sprintf (stub_name, "%08x.%s+%x", input_section->id & 0xffffffff, h->elf.root.root.string, (int) rel->r_addend & 0xffffffff); @@ -3048,7 +3048,7 @@ ppc_stub_name (const asection *input_section, stub_name = bfd_malloc (len); if (stub_name != NULL) { - sprintf (stub_name, "%08x_%x:%x+%x", + sprintf (stub_name, "%08x.%x:%x+%x", input_section->id & 0xffffffff, sym_sec->id & 0xffffffff, (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, @@ -4583,7 +4583,17 @@ ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info, } if (h->plt.plist != NULL) - return TRUE; + { + /* We should never get here, but unfortunately there are versions + of gcc out there that improperly (for this ABI) put initialized + function pointers, vtable refs and suchlike in read-only + sections. Allow them to proceed, but warn that this might + break at runtime. */ + (*_bfd_error_handler) + (_("copy reloc against `%s' requires lazy plt linking; " + "avoid setting LD_BIND_NOW=1 or upgrade gcc"), + h->root.root.string); + } /* This is a reference to a symbol defined by a dynamic object which is not a function. */ @@ -6096,8 +6106,6 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) struct ppc_branch_hash_entry *br_entry; struct bfd_link_info *info; struct ppc_link_hash_table *htab; - asection *stub_sec; - bfd *stub_bfd; bfd_byte *loc; bfd_byte *p; unsigned int indx; @@ -6110,29 +6118,10 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) info = in_arg; htab = ppc_hash_table (info); - stub_sec = stub_entry->stub_sec; /* Make a note of the offset within the stubs for this entry. */ - stub_entry->stub_offset = stub_sec->_cooked_size; - loc = stub_sec->contents + stub_entry->stub_offset; - - if (htab->emit_stub_syms) - { - struct elf_link_hash_entry *h; - h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string, - TRUE, FALSE, FALSE); - if (h == NULL) - return FALSE; - h->root.type = bfd_link_hash_defined; - h->root.u.def.section = stub_entry->stub_sec; - h->root.u.def.value = stub_entry->stub_offset; - h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR - | ELF_LINK_HASH_DEF_REGULAR - | ELF_LINK_HASH_REF_REGULAR_NONWEAK - | ELF_LINK_FORCED_LOCAL); - } - - stub_bfd = stub_sec->owner; + stub_entry->stub_offset = stub_entry->stub_sec->_cooked_size; + loc = stub_entry->stub_sec->contents + stub_entry->stub_offset; htab->stub_count[stub_entry->stub_type - 1] += 1; switch (stub_entry->stub_type) @@ -6146,8 +6135,8 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) /* And this is where we are coming from. */ off -= (stub_entry->stub_offset - + stub_sec->output_offset - + stub_sec->output_section->vma); + + stub_entry->stub_sec->output_offset + + stub_entry->stub_sec->output_section->vma); if (stub_entry->stub_type != ppc_stub_long_branch_r2off) size = 4; @@ -6157,16 +6146,16 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) r2off = (htab->stub_group[stub_entry->target_section->id].toc_off - htab->stub_group[stub_entry->id_sec->id].toc_off); - bfd_put_32 (stub_bfd, STD_R2_40R1, loc); + bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc); loc += 4; - bfd_put_32 (stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); + bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); loc += 4; - bfd_put_32 (stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); + bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); loc += 4; off -= 12; size = 16; } - bfd_put_32 (stub_bfd, B_DOT | (off & 0x3fffffc), loc); + bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc); BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26)); break; @@ -6227,9 +6216,9 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) indx = off; if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) { - bfd_put_32 (stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc); + bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc); loc += 4; - bfd_put_32 (stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc); + bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc); size = 16; } else @@ -6238,21 +6227,21 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) r2off = (htab->stub_group[stub_entry->target_section->id].toc_off - htab->stub_group[stub_entry->id_sec->id].toc_off); - bfd_put_32 (stub_bfd, STD_R2_40R1, loc); + bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc); loc += 4; - bfd_put_32 (stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc); + bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc); loc += 4; - bfd_put_32 (stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc); + bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc); loc += 4; - bfd_put_32 (stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); + bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); loc += 4; - bfd_put_32 (stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); + bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); size = 28; } loc += 4; - bfd_put_32 (stub_bfd, MTCTR_R11, loc); + bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc); loc += 4; - bfd_put_32 (stub_bfd, BCTR, loc); + bfd_put_32 (htab->stub_bfd, BCTR, loc); break; case ppc_stub_plt_call: @@ -6299,7 +6288,7 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) return FALSE; } - p = build_plt_stub (stub_bfd, loc, off); + p = build_plt_stub (htab->stub_bfd, loc, off); size = p - loc; break; @@ -6308,7 +6297,31 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) return FALSE; } - stub_sec->_cooked_size += size; + stub_entry->stub_sec->_cooked_size += size; + + if (htab->emit_stub_syms + && !(stub_entry->stub_type == ppc_stub_plt_call + && stub_entry->h->oh->root.type == bfd_link_hash_defined + && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec + && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset)) + { + struct elf_link_hash_entry *h; + h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string, + TRUE, FALSE, FALSE); + if (h == NULL) + return FALSE; + if (h->root.type == bfd_link_hash_new) + { + h->root.type = bfd_link_hash_defined; + h->root.u.def.section = stub_entry->stub_sec; + h->root.u.def.value = stub_entry->stub_offset; + h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR + | ELF_LINK_HASH_DEF_REGULAR + | ELF_LINK_HASH_REF_REGULAR_NONWEAK + | ELF_LINK_FORCED_LOCAL); + } + } + return TRUE; } @@ -7094,6 +7107,23 @@ ppc64_elf_build_stubs (bfd_boolean emit_stub_syms, return FALSE; } + if (htab->emit_stub_syms) + { + struct elf_link_hash_entry *h; + h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE); + if (h == NULL) + return FALSE; + if (h->root.type == bfd_link_hash_new) + { + h->root.type = bfd_link_hash_defined; + h->root.u.def.section = htab->glink; + h->root.u.def.value = 0; + h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR + | ELF_LINK_HASH_DEF_REGULAR + | ELF_LINK_HASH_REF_REGULAR_NONWEAK + | ELF_LINK_FORCED_LOCAL); + } + } p = htab->glink->contents; bfd_put_32 (htab->glink->owner, MFCTR_R12, p); p += 4; -- 2.30.2