X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=bfd%2Felf32-m32c.c;h=635d6648cf62794e9c5da651c56e94391daec728;hb=60a019a089177f3f58f636580857414d769b8c11;hp=667a4828d27a2dd66174dbf3fa8b3db123f3e1fb;hpb=87e0a731c84e58c8a6f63b38baacbc066a70ab28;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/elf32-m32c.c b/bfd/elf32-m32c.c index 667a4828d2..635d6648cf 100644 --- a/bfd/elf32-m32c.c +++ b/bfd/elf32-m32c.c @@ -1,6 +1,5 @@ /* M16C/M32C specific support for 32-bit ELF. - Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 - Free Software Foundation, Inc. + Copyright (C) 2005-2016 Free Software Foundation, Inc. This file is part of BFD, the Binary File Descriptor library. @@ -28,9 +27,9 @@ /* Forward declarations. */ static reloc_howto_type * m32c_reloc_type_lookup (bfd *, bfd_reloc_code_real_type); -static void m32c_info_to_howto_rela +static void m32c_info_to_howto_rela (bfd *, arelent *, Elf_Internal_Rela *); -static bfd_boolean m32c_elf_relocate_section +static bfd_boolean m32c_elf_relocate_section (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); static bfd_boolean m32c_elf_check_relocs (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); @@ -41,6 +40,8 @@ void dump_symtab (bfd *, void *, void *); #endif static bfd_boolean m32c_elf_relax_section (bfd *abfd, asection *sec, struct bfd_link_info *link_info, bfd_boolean *again); +static bfd_reloc_status_type m32c_apply_reloc_24 + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); static reloc_howto_type m32c_elf_howto_table [] = @@ -48,11 +49,11 @@ static reloc_howto_type m32c_elf_howto_table [] = /* This reloc does nothing. */ HOWTO (R_M32C_NONE, /* type */ 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ + 3, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ + complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_M32C_NONE", /* name */ FALSE, /* partial_inplace */ @@ -84,7 +85,7 @@ static reloc_howto_type m32c_elf_howto_table [] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ + m32c_apply_reloc_24, /* special_function */ "R_M32C_24", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ @@ -265,10 +266,10 @@ m32c_reloc_type_lookup { unsigned int i; - for (i = ARRAY_SIZE (m32c_reloc_map); --i;) + for (i = ARRAY_SIZE (m32c_reloc_map); i--;) if (m32c_reloc_map [i].bfd_reloc_val == code) return & m32c_elf_howto_table [m32c_reloc_map[i].m32c_reloc_val]; - + return NULL; } @@ -298,12 +299,58 @@ m32c_info_to_howto_rela unsigned int r_type; r_type = ELF32_R_TYPE (dst->r_info); - BFD_ASSERT (r_type < (unsigned int) R_M32C_max); + if (r_type >= (unsigned int) R_M32C_max) + { + _bfd_error_handler (_("%B: invalid M32C reloc number: %d"), abfd, r_type); + r_type = 0; + } cache_ptr->howto = & m32c_elf_howto_table [r_type]; } +/* Apply R_M32C_24 relocations. We have to do this because it's not a + power-of-two size, and the generic code may think it overruns the + section if it's right at the end. + + Must return something other than bfd_reloc_continue to avoid the + above problem. Typical return values include bfd_reloc_ok or + bfd_reloc_overflow. +*/ + +static bfd_reloc_status_type m32c_apply_reloc_24 (bfd *abfd ATTRIBUTE_UNUSED, + arelent *reloc_entry, + asymbol *symbol, + void *vdata_start ATTRIBUTE_UNUSED, + asection *input_section, + bfd *ibfd ATTRIBUTE_UNUSED, + char **error_msg ATTRIBUTE_UNUSED) +{ + bfd_vma relocation; + bfd_reloc_status_type s; + + s = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, + vdata_start, + input_section, ibfd, error_msg); + if (s != bfd_reloc_continue) + return s; + + /* Get symbol value. (Common symbols are special.) */ + if (bfd_is_com_section (symbol->section)) + relocation = 0; + else + relocation = symbol->value; + + relocation += symbol->section->output_offset; + + /* Add in supplied addend. */ + relocation += reloc_entry->addend; + + reloc_entry->addend = relocation; + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; +} + /* Relocate an M32C ELF section. There is some attempt to make this function usable for many architectures, both USE_REL and USE_RELA ['twould be nice if such a critter existed], @@ -375,7 +422,7 @@ m32c_elf_relocate_section bfd_reloc_status_type r; const char * name = NULL; int r_type; - + r_type = ELF32_R_TYPE (rel->r_info); /* These are only used for relaxing; we don't actually relocate @@ -384,7 +431,7 @@ m32c_elf_relocate_section || r_type == R_M32C_RL_1ADDR || r_type == R_M32C_RL_2ADDR) continue; - + r_symndx = ELF32_R_SYM (rel->r_info); howto = m32c_elf_howto_table + ELF32_R_TYPE (rel->r_info); @@ -400,7 +447,7 @@ m32c_elf_relocate_section relocation = (sec->output_section->vma + sec->output_offset + sym->st_value); - + name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name); name = (sym->st_name == 0) ? bfd_section_name (input_bfd, sec) : name; @@ -408,13 +455,18 @@ m32c_elf_relocate_section else { h = sym_hashes [r_symndx - symtab_hdr->sh_info]; - + + if (info->wrap_hash != NULL + && (input_section->flags & SEC_DEBUGGING) != 0) + h = ((struct elf_link_hash_entry *) + unwrap_hash_lookup (info, input_bfd, &h->root)); + 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; name = h->root.root.string; - + if (h->root.type == bfd_link_hash_defined || h->root.type == bfd_link_hash_defweak) { @@ -425,20 +477,17 @@ m32c_elf_relocate_section } else if (h->root.type == bfd_link_hash_undefweak) ; - else if (!info->relocatable) - { - if (! ((*info->callbacks->undefined_symbol) - (info, h->root.root.string, input_bfd, - input_section, rel->r_offset, TRUE))) - return FALSE; - } + else if (!bfd_link_relocatable (info)) + (*info->callbacks->undefined_symbol) (info, h->root.root.string, + input_bfd, input_section, + rel->r_offset, TRUE); } if (sec != NULL && discarded_section (sec)) RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, rel, 1, relend, howto, 0, contents); - if (info->relocatable) + if (bfd_link_relocatable (info)) { /* This is a relocatable link. We don't have to change anything, unless the reloc is against a section symbol, @@ -527,9 +576,32 @@ m32c_elf_relocate_section printf ("\n"); } #endif - r = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, relocation, - rel->r_addend); + switch (ELF32_R_TYPE(rel->r_info)) + { + case R_M32C_24: + /* Like m32c_apply_reloc_24, we must handle this one separately. */ + relocation += rel->r_addend; + + /* Sanity check the address. */ + if (rel->r_offset + 3 + > bfd_get_section_limit_octets (input_bfd, input_section)) + r = bfd_reloc_outofrange; + else + { + bfd_put_8 (input_bfd, relocation & 0xff, contents + rel->r_offset); + bfd_put_8 (input_bfd, (relocation >> 8) & 0xff, contents + rel->r_offset + 1); + bfd_put_8 (input_bfd, (relocation >> 16) & 0xff, contents + rel->r_offset + 2); + r = bfd_reloc_ok; + } + + break; + + default: + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, relocation, + rel->r_addend); + break; + } if (r != bfd_reloc_ok) { @@ -538,17 +610,16 @@ m32c_elf_relocate_section switch (r) { case bfd_reloc_overflow: - r = info->callbacks->reloc_overflow + (*info->callbacks->reloc_overflow) (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, input_bfd, input_section, rel->r_offset); break; - + case bfd_reloc_undefined: - r = info->callbacks->undefined_symbol - (info, name, input_bfd, input_section, rel->r_offset, - TRUE); + (*info->callbacks->undefined_symbol) + (info, name, input_bfd, input_section, rel->r_offset, TRUE); break; - + case bfd_reloc_outofrange: msg = _("internal error: out of range error"); break; @@ -567,11 +638,8 @@ m32c_elf_relocate_section } if (msg) - r = info->callbacks->warning - (info, msg, name, input_bfd, input_section, rel->r_offset); - - if (! r) - return FALSE; + (*info->callbacks->warning) (info, msg, name, input_bfd, + input_section, rel->r_offset); } } @@ -580,7 +648,7 @@ m32c_elf_relocate_section /* We support 16-bit pointers to code above 64k by generating a thunk below 64k containing a JMP instruction to the final address. */ - + static bfd_boolean m32c_elf_check_relocs (bfd * abfd, @@ -595,10 +663,10 @@ m32c_elf_check_relocs bfd_vma *local_plt_offsets; asection *splt; bfd *dynobj; - - if (info->relocatable) + + if (bfd_link_relocatable (info)) return TRUE; - + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; sym_hashes = elf_sym_hashes (abfd); local_plt_offsets = elf_local_got_offsets (abfd); @@ -611,7 +679,7 @@ m32c_elf_check_relocs struct elf_link_hash_entry *h; unsigned long r_symndx; bfd_vma *offset; - + r_symndx = ELF32_R_SYM (rel->r_info); if (r_symndx < symtab_hdr->sh_info) h = NULL; @@ -621,8 +689,12 @@ m32c_elf_check_relocs 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; + + /* PR15323, ref flags aren't set for references in the same + object. */ + h->root.non_ir_ref = 1; } - + switch (ELF32_R_TYPE (rel->r_info)) { /* This relocation describes a 16-bit pointer to a function. @@ -676,7 +748,7 @@ m32c_elf_check_relocs break; } } - + return TRUE; } @@ -714,7 +786,7 @@ m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *dynobj; asection *splt; - if (info->relocatable) + if (bfd_link_relocatable (info)) return TRUE; dynobj = elf_hash_table (info)->dynobj; @@ -799,7 +871,7 @@ m32c_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break; } } - + /* Print out any mismatches from above. */ if (new_opt[0]) { @@ -830,7 +902,7 @@ m32c_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) static bfd_boolean -m32c_elf_print_private_bfd_data (bfd *abfd, PTR ptr) +m32c_elf_print_private_bfd_data (bfd *abfd, void *ptr) { FILE *file = (FILE *) ptr; flagword flags; @@ -902,7 +974,7 @@ dump_symtab (bfd * abfd, void *internal_syms, void *external_syms) external_syms = bfd_malloc (1000); free_external = 1; } - + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym; if (free_internal) @@ -917,37 +989,83 @@ dump_symtab (bfd * abfd, void *internal_syms, void *external_syms) { switch (ELF_ST_TYPE (isym->st_info)) { - case STT_FUNC: st_info_str = "STT_FUNC"; - case STT_SECTION: st_info_str = "STT_SECTION"; - case STT_FILE: st_info_str = "STT_FILE"; - case STT_OBJECT: st_info_str = "STT_OBJECT"; - case STT_TLS: st_info_str = "STT_TLS"; - default: st_info_str = ""; + case STT_FUNC: + st_info_str = "STT_FUNC"; + break; + + case STT_SECTION: + st_info_str = "STT_SECTION"; + break; + + case STT_FILE: + st_info_str = "STT_FILE"; + break; + + case STT_OBJECT: + st_info_str = "STT_OBJECT"; + break; + + case STT_TLS: + st_info_str = "STT_TLS"; + break; + + default: + st_info_str = ""; } + switch (ELF_ST_BIND (isym->st_info)) { - case STB_LOCAL: st_info_stb_str = "STB_LOCAL"; - case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL"; - default: st_info_stb_str = ""; + case STB_LOCAL: + st_info_stb_str = "STB_LOCAL"; + break; + + case STB_GLOBAL: + st_info_stb_str = "STB_GLOBAL"; + break; + + default: + st_info_stb_str = ""; } + switch (ELF_ST_VISIBILITY (isym->st_other)) { - case STV_DEFAULT: st_other_str = "STV_DEFAULT"; - case STV_INTERNAL: st_other_str = "STV_INTERNAL"; - case STV_PROTECTED: st_other_str = "STV_PROTECTED"; - default: st_other_str = ""; + case STV_DEFAULT: + st_other_str = "STV_DEFAULT"; + break; + + case STV_INTERNAL: + st_other_str = "STV_INTERNAL"; + break; + + case STV_PROTECTED: + st_other_str = "STV_PROTECTED"; + break; + + default: + st_other_str = ""; } + switch (isym->st_shndx) { - case SHN_ABS: st_shndx_str = "SHN_ABS"; - case SHN_COMMON: st_shndx_str = "SHN_COMMON"; - case SHN_UNDEF: st_shndx_str = "SHN_UNDEF"; - default: st_shndx_str = ""; + case SHN_ABS: + st_shndx_str = "SHN_ABS"; + break; + + case SHN_COMMON: + st_shndx_str = "SHN_COMMON"; + break; + + case SHN_UNDEF: + st_shndx_str = "SHN_UNDEF"; + break; + + default: + st_shndx_str = ""; } - + printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s " "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n", - isym, + isym, (unsigned long) isym->st_value, (unsigned long) isym->st_size, isym->st_name, @@ -985,8 +1103,7 @@ struct relax_plt_data }; static bfd_boolean -m32c_relax_plt_check (struct elf_link_hash_entry *h, - PTR xdata) +m32c_relax_plt_check (struct elf_link_hash_entry *h, void * xdata) { struct relax_plt_data *data = (struct relax_plt_data *) xdata; @@ -1017,8 +1134,7 @@ m32c_relax_plt_check (struct elf_link_hash_entry *h, previously had a plt entry, give it a new entry offset. */ static bfd_boolean -m32c_relax_plt_realloc (struct elf_link_hash_entry *h, - PTR xdata) +m32c_relax_plt_realloc (struct elf_link_hash_entry *h, void * xdata) { bfd_vma *entry = (bfd_vma *) xdata; @@ -1042,7 +1158,7 @@ m32c_elf_relax_plt_section (asection *splt, /* Assume nothing changes. */ *again = FALSE; - if (info->relocatable) + if (bfd_link_relocatable (info)) return TRUE; /* Quick check for an empty plt. */ @@ -1058,7 +1174,7 @@ m32c_elf_relax_plt_section (asection *splt, /* Likewise for local symbols, though that's somewhat less convenient as we have to walk the list of input bfds and swap in symbol data. */ - for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next) + for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link.next) { bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); Elf_Internal_Shdr *symtab_hdr; @@ -1132,7 +1248,7 @@ m32c_elf_relax_plt_section (asection *splt, elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_realloc, &entry); - for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next) + for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link.next) { bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info; @@ -1344,14 +1460,17 @@ m32c_elf_relax_section /* We don't have to do anything for a relocatable link, if this section does not have relocs, or if this is not a code section. */ - if (link_info->relocatable + if (bfd_link_relocatable (link_info) || (sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0) return TRUE; - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; + symtab_hdr = & elf_symtab_hdr (abfd); + if (elf_symtab_shndx_list (abfd)) + shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; + else + shndx_hdr = NULL; /* Get the section contents. */ if (elf_section_data (sec)->this_hdr.contents != NULL) @@ -1372,7 +1491,7 @@ m32c_elf_relax_section symtab_hdr->contents = (bfd_byte *) intsyms; } - if (shndx_hdr->sh_size != 0) + if (shndx_hdr && shndx_hdr->sh_size != 0) { bfd_size_type amt; @@ -1382,14 +1501,14 @@ m32c_elf_relax_section if (shndx_buf == NULL) goto error_return; if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0 - || bfd_bread ((PTR) shndx_buf, amt, abfd) != amt) + || bfd_bread (shndx_buf, amt, abfd) != amt) goto error_return; shndx_hdr->contents = (bfd_byte *) shndx_buf; } /* Get a copy of the native relocations. */ internal_relocs = (_bfd_elf_link_read_relocs - (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, + (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, link_info->keep_memory)); if (internal_relocs == NULL) goto error_return; @@ -1581,7 +1700,7 @@ m32c_elf_relax_section enctbl = m16c_addr_encodings; posn = 2; - + /* Check the opcode for jumps. We know it's safe to do this because all 2ADDR insns are at least two bytes long. */ @@ -1767,7 +1886,7 @@ m32c_elf_relax_section /* Note that we've changed the relocs, section contents, etc. */ elf_section_data (sec)->relocs = internal_relocs; free_relocs = NULL; - + elf_section_data (sec)->this_hdr.contents = contents; free_contents = NULL; @@ -1920,8 +2039,16 @@ m32c_elf_relax_delete_bytes isymend = isym + symtab_hdr->sh_info; sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); - shndx_hdr = & elf_tdata (abfd)->symtab_shndx_hdr; - shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents; + if (elf_symtab_shndx_list (abfd)) + { + shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; + shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents; + } + else + { + shndx_hdr = NULL; + shndx_buf = NULL; + } shndx = shndx_buf; for (; isym < isymend; isym++, shndx = (shndx ? shndx + 1 : NULL)) @@ -1996,10 +2123,10 @@ _bfd_m32c_elf_eh_frame_address_size (bfd *abfd, asection *sec ATTRIBUTE_UNUSED) #define ELF_MAXPAGESIZE 0x100 #if 0 -#define TARGET_BIG_SYM bfd_elf32_m32c_vec +#define TARGET_BIG_SYM m32c_elf32_vec #define TARGET_BIG_NAME "elf32-m32c" #else -#define TARGET_LITTLE_SYM bfd_elf32_m32c_vec +#define TARGET_LITTLE_SYM m32c_elf32_vec #define TARGET_LITTLE_NAME "elf32-m32c" #endif