From 7f7cef942c699893eb214c95ce4f44f4aef82470 Mon Sep 17 00:00:00 2001 From: Nick Clifton Date: Mon, 1 Feb 1999 20:23:31 +0000 Subject: [PATCH] Add GC support. --- bfd/ChangeLog | 6 ++++ bfd/elf32-fr30.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 80 insertions(+), 2 deletions(-) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 4dbd44728dc..c8045525482 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,9 @@ +1999-02-01 Nick Clifton + + * elf32-fr30.c (fr30_elf_gc_mark_hook): New function. + (fr30_elf_gc_sweep_hook): New function. + (elf_backend_can_gc_sections): Define. + Mon Feb 1 12:21:47 1999 Catherine Moore * targets.c (bfd_target_vector): Add bfd_elf32_littlearm_oabi_vec diff --git a/bfd/elf32-fr30.c b/bfd/elf32-fr30.c index 8bd5b91c1b5..2ee500d9c92 100644 --- a/bfd/elf32-fr30.c +++ b/bfd/elf32-fr30.c @@ -36,6 +36,10 @@ static boolean fr30_elf_relocate_section PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); static bfd_reloc_status_type fr30_final_link_relocate PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma)); +static boolean fr30_elf_gc_sweep_hook + PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); +static asection * fr30_elf_gc_mark_hook + PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *)); static reloc_howto_type fr30_elf_howto_table [] = { @@ -523,7 +527,14 @@ fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section, bfd_vma relocation; bfd_reloc_status_type r; const char * name = NULL; - + int r_type; + + r_type = ELF32_R_TYPE (rel->r_info); + + if ( r_type == R_FR30_GNU_VTINHERIT + || r_type == R_FR30_GNU_VTENTRY) + continue; + r_symndx = ELF32_R_SYM (rel->r_info); if (info->relocateable) @@ -664,6 +675,63 @@ fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section, return true; } +/* Return the section that should be marked against GC for a given + relocation. */ + +static asection * +fr30_elf_gc_mark_hook (abfd, info, rel, h, sym) + bfd * abfd; + struct bfd_link_info * info; + Elf_Internal_Rela * rel; + struct elf_link_hash_entry * h; + Elf_Internal_Sym * sym; +{ + if (h != NULL) + { + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_FR30_GNU_VTINHERIT: + case R_FR30_GNU_VTENTRY: + break; + + default: + switch (h->root.type) + { + case bfd_link_hash_defined: + case bfd_link_hash_defweak: + return h->root.u.def.section; + + case bfd_link_hash_common: + return h->root.u.c.p->section; + } + } + } + else + { + if (!(elf_bad_symtab (abfd) + && ELF_ST_BIND (sym->st_info) != STB_LOCAL) + && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) + && sym->st_shndx != SHN_COMMON)) + { + return bfd_section_from_elf_index (abfd, sym->st_shndx); + } + } + + return NULL; +} + +/* Update the got entry reference counts for the section being removed. */ + +static boolean +fr30_elf_gc_sweep_hook (abfd, info, sec, relocs) + bfd * abfd; + struct bfd_link_info * info; + asection * sec; + const Elf_Internal_Rela * relocs; +{ + return true; +} + #define ELF_ARCH bfd_arch_fr30 #define ELF_MACHINE_CODE EM_CYGNUS_FR30 #define ELF_MAXPAGESIZE 0x1000 @@ -674,7 +742,11 @@ fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section, #define elf_info_to_howto_rel NULL #define elf_info_to_howto fr30_info_to_howto_rela #define elf_backend_relocate_section fr30_elf_relocate_section +#define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook +#define elf_backend_gc_sweep_hook fr30_elf_gc_sweep_hook + +#define elf_backend_can_gc_sections 1 #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup - + #include "elf32-target.h" -- 2.30.2