From 64af66797165654d16dd1c8960ee61785782f2a7 Mon Sep 17 00:00:00 2001 From: Jeff Law Date: Thu, 20 Feb 1997 20:54:28 +0000 Subject: [PATCH] * elf32-mn10200.c (mn10200_elf_final_link_relocate): New function. (mn10200_elf_relocate_section): Likewise. (elf_backend_relocate_section): Define. New style linker for the mn10200. --- bfd/ChangeLog | 6 + bfd/elf32-mn10200.c | 270 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 276 insertions(+) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index cef59c0a2f0..4266562d651 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,9 @@ +Thu Feb 20 13:52:16 1997 Jeffrey A Law (law@cygnus.com) + + * elf32-mn10200.c (mn10200_elf_final_link_relocate): New function. + (mn10200_elf_relocate_section): Likewise. + (elf_backend_relocate_section): Define. + start-sanitize-d30v Tue Feb 18 17:22:59 1997 Martin M. Hunt diff --git a/bfd/elf32-mn10200.c b/bfd/elf32-mn10200.c index 747c84e5629..d86c18def0f 100644 --- a/bfd/elf32-mn10200.c +++ b/bfd/elf32-mn10200.c @@ -213,6 +213,275 @@ mn10200_info_to_howto (abfd, cache_ptr, dst) cache_ptr->howto = &elf_mn10200_howto_table[r_type]; } +/* Perform a relocation as part of a final link. */ +static bfd_reloc_status_type +mn10200_elf_final_link_relocate (howto, input_bfd, output_bfd, + input_section, contents, offset, value, + addend, info, sym_sec, is_local) + reloc_howto_type *howto; + bfd *input_bfd; + bfd *output_bfd; + asection *input_section; + bfd_byte *contents; + bfd_vma offset; + bfd_vma value; + bfd_vma addend; + struct bfd_link_info *info; + asection *sym_sec; + int is_local; +{ + unsigned long insn; + unsigned long r_type = howto->type; + bfd_byte *hit_data = contents + offset; + + switch (r_type) + { + + case R_MN10200_NONE: + return bfd_reloc_ok; + + case R_MN10200_32: + value += bfd_get_32 (input_bfd, hit_data); + value += addend; + bfd_put_32 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_MN10200_16: + value += (short)bfd_get_16 (input_bfd, hit_data); + value += addend; + + if ((long)value > 0x7fff || (long)value < -0x8000) + return bfd_reloc_overflow; + + bfd_put_16 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_MN10200_8: + value += (char)bfd_get_8 (input_bfd, hit_data); + value += addend; + + if ((long)value > 0x7fff || (long)value < -0x8000) + return bfd_reloc_overflow; + + bfd_put_8 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_MN10200_24: + value += (bfd_get_32 (input_bfd, hit_data) & 0xffffff); + value += addend; + + if ((long)value > 0x7fffff || (long)value < -0x800000) + return bfd_reloc_overflow; + + value &= 0xffffff; + value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); + bfd_put_32 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_MN10200_PCREL8: + value -= (input_section->output_section->vma + + input_section->output_offset); + value -= offset; + value += addend; + + if ((long)value > 0xff || (long)value < -0x100) + return bfd_reloc_overflow; + + bfd_put_8 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_MN10200_PCREL16: + value -= (input_section->output_section->vma + + input_section->output_offset); + value -= offset; + value += addend; + + if ((long)value > 0xffff || (long)value < -0x10000) + return bfd_reloc_overflow; + + bfd_put_16 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_MN10200_PCREL24: + value -= (input_section->output_section->vma + + input_section->output_offset); + value -= offset; + value += addend; + + if ((long)value > 0xffffff || (long)value < -0x1000000) + return bfd_reloc_overflow; + + value &= 0xffffff; + value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); + bfd_put_32 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + default: + return bfd_reloc_notsupported; + } +} + + +/* Relocate an MN10200 ELF section. */ +static boolean +mn10200_elf_relocate_section (output_bfd, info, input_bfd, input_section, + contents, relocs, local_syms, local_sections) + bfd *output_bfd; + struct bfd_link_info *info; + bfd *input_bfd; + asection *input_section; + bfd_byte *contents; + Elf_Internal_Rela *relocs; + Elf_Internal_Sym *local_syms; + asection **local_sections; +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + Elf_Internal_Rela *rel, *relend; + + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++) + { + int r_type; + reloc_howto_type *howto; + unsigned long r_symndx; + Elf_Internal_Sym *sym; + asection *sec; + struct elf_link_hash_entry *h; + bfd_vma relocation; + bfd_reloc_status_type r; + + r_symndx = ELF32_R_SYM (rel->r_info); + r_type = ELF32_R_TYPE (rel->r_info); + howto = elf_mn10200_howto_table + r_type; + + if (info->relocateable) + { + /* This is a relocateable link. We don't have to change + anything, unless the reloc is against a section symbol, + in which case we have to adjust according to where the + section symbol winds up in the output section. */ + if (r_symndx < symtab_hdr->sh_info) + { + sym = local_syms + r_symndx; + if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) + { + sec = local_sections[r_symndx]; + rel->r_addend += sec->output_offset + sym->st_value; + } + } + + continue; + } + + /* This is a final link. */ + h = NULL; + sym = NULL; + sec = NULL; + if (r_symndx < symtab_hdr->sh_info) + { + sym = local_syms + r_symndx; + sec = local_sections[r_symndx]; + relocation = (sec->output_section->vma + + sec->output_offset + + sym->st_value); + } + else + { + 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; + if (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + { + sec = h->root.u.def.section; + relocation = (h->root.u.def.value + + sec->output_section->vma + + sec->output_offset); + } + else if (h->root.type == bfd_link_hash_undefweak) + relocation = 0; + else + { + if (! ((*info->callbacks->undefined_symbol) + (info, h->root.root.string, input_bfd, + input_section, rel->r_offset))) + return false; + relocation = 0; + } + } + + r = mn10200_elf_final_link_relocate (howto, input_bfd, output_bfd, + input_section, + contents, rel->r_offset, + relocation, rel->r_addend, + info, sec, h == NULL); + + if (r != bfd_reloc_ok) + { + const char *name; + const char *msg = (const char *)0; + + if (h != NULL) + name = h->root.root.string; + else + { + name = (bfd_elf_string_from_elf_section + (input_bfd, symtab_hdr->sh_link, sym->st_name)); + if (name == NULL || *name == '\0') + name = bfd_section_name (input_bfd, sec); + } + + switch (r) + { + case bfd_reloc_overflow: + if (! ((*info->callbacks->reloc_overflow) + (info, name, howto->name, (bfd_vma) 0, + input_bfd, input_section, rel->r_offset))) + return false; + break; + + case bfd_reloc_undefined: + if (! ((*info->callbacks->undefined_symbol) + (info, name, input_bfd, input_section, + rel->r_offset))) + return false; + break; + + case bfd_reloc_outofrange: + msg = "internal error: out of range error"; + goto common_error; + + case bfd_reloc_notsupported: + msg = "internal error: unsupported relocation error"; + goto common_error; + + case bfd_reloc_dangerous: + msg = "internal error: dangerous error"; + goto common_error; + + default: + msg = "internal error: unknown error"; + /* fall through */ + + common_error: + if (!((*info->callbacks->warning) + (info, msg, name, input_bfd, input_section, + rel->r_offset))) + return false; + break; + } + } + } + + return true; +} + #define TARGET_LITTLE_SYM bfd_elf32_mn10200_vec #define TARGET_LITTLE_NAME "elf32-mn10200" #define ELF_ARCH bfd_arch_mn10200 @@ -221,6 +490,7 @@ mn10200_info_to_howto (abfd, cache_ptr, dst) #define elf_info_to_howto mn10200_info_to_howto #define elf_info_to_howto_rel 0 +#define elf_backend_relocate_section mn10200_elf_relocate_section #define elf_symbol_leading_char '_' -- 2.30.2