From 214a88768d34079b70e0f2ba37b91a3b717fddbb Mon Sep 17 00:00:00 2001 From: Michael Davidson Date: Tue, 21 Jan 2014 12:32:23 -0800 Subject: x86, relocs: Add manual debug mode Improve the debuggability of relocations output. When trying to compare the output between different linkers, it's handy to be able to see the section names in output. Signed-off-by: Michael Davidson Link: http://lkml.kernel.org/r/20140121203223.GA12649@www.outflux.net Signed-off-by: Kees Cook Signed-off-by: H. Peter Anvin --- arch/x86/tools/relocs.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) (limited to 'arch/x86/tools/relocs.c') diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c index f7bab68..9c2ab06 100644 --- a/arch/x86/tools/relocs.c +++ b/arch/x86/tools/relocs.c @@ -1015,6 +1015,29 @@ 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 +1045,8 @@ 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 +1064,9 @@ 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); } -- cgit v1.1