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author | Jiri Kosina <jkosina@suse.cz> | 2014-02-20 14:54:28 +0100 |
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committer | Jiri Kosina <jkosina@suse.cz> | 2014-02-20 14:54:28 +0100 |
commit | d4263348f796f29546f90802177865dd4379dd0a (patch) | |
tree | adcbdaebae584eee2f32fab95e826e8e49eef385 /arch/x86/tools/relocs.c | |
parent | be873ac782f5ff5ee6675f83929f4fe6737eead2 (diff) | |
parent | 6d0abeca3242a88cab8232e4acd7e2bf088f3bc2 (diff) | |
download | blackbird-op-linux-d4263348f796f29546f90802177865dd4379dd0a.tar.gz blackbird-op-linux-d4263348f796f29546f90802177865dd4379dd0a.zip |
Merge branch 'master' into for-next
Diffstat (limited to 'arch/x86/tools/relocs.c')
-rw-r--r-- | arch/x86/tools/relocs.c | 50 |
1 files changed, 44 insertions, 6 deletions
diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c index f7bab68a4b83..cfbdbdb4e173 100644 --- a/arch/x86/tools/relocs.c +++ b/arch/x86/tools/relocs.c @@ -722,15 +722,25 @@ static void percpu_init(void) /* * Check to see if a symbol lies in the .data..percpu section. - * For some as yet not understood reason the "__init_begin" - * symbol which immediately preceeds the .data..percpu section - * also shows up as it it were part of it so we do an explict - * check for that symbol name and ignore it. + * + * The linker incorrectly associates some symbols with the + * .data..percpu section so we also need to check the symbol + * name to make sure that we classify the symbol correctly. + * + * The GNU linker incorrectly associates: + * __init_begin + * __per_cpu_load + * + * The "gold" linker incorrectly associates: + * init_per_cpu__irq_stack_union + * init_per_cpu__gdt_page */ static int is_percpu_sym(ElfW(Sym) *sym, const char *symname) { return (sym->st_shndx == per_cpu_shndx) && - strcmp(symname, "__init_begin"); + strcmp(symname, "__init_begin") && + strcmp(symname, "__per_cpu_load") && + strncmp(symname, "init_per_cpu_", 13); } @@ -1015,6 +1025,29 @@ static void emit_relocs(int as_text, int use_real_mode) } } +/* + * As an aid to debugging problems with different linkers + * print summary information about the relocs. + * Since different linkers tend to emit the sections in + * different orders we use the section names in the output. + */ +static int do_reloc_info(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym, + const char *symname) +{ + printf("%s\t%s\t%s\t%s\n", + sec_name(sec->shdr.sh_info), + rel_type(ELF_R_TYPE(rel->r_info)), + symname, + sec_name(sym->st_shndx)); + return 0; +} + +static void print_reloc_info(void) +{ + printf("reloc section\treloc type\tsymbol\tsymbol section\n"); + walk_relocs(do_reloc_info); +} + #if ELF_BITS == 64 # define process process_64 #else @@ -1022,7 +1055,8 @@ static void emit_relocs(int as_text, int use_real_mode) #endif void process(FILE *fp, int use_real_mode, int as_text, - int show_absolute_syms, int show_absolute_relocs) + int show_absolute_syms, int show_absolute_relocs, + int show_reloc_info) { regex_init(use_real_mode); read_ehdr(fp); @@ -1040,5 +1074,9 @@ void process(FILE *fp, int use_real_mode, int as_text, print_absolute_relocs(); return; } + if (show_reloc_info) { + print_reloc_info(); + return; + } emit_relocs(as_text, use_real_mode); } |