diff options
Diffstat (limited to 'tools/perf/util')
| -rw-r--r-- | tools/perf/util/symbol.c | 140 | ||||
| -rw-r--r-- | tools/perf/util/symbol.h | 4 |
2 files changed, 144 insertions, 0 deletions
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 5151a8c0b791..5ddf76fb691c 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -1526,6 +1526,138 @@ out_failure: return -1; } +#ifdef HAVE_LIBBFD_SUPPORT +#define PACKAGE 'perf' +#include <bfd.h> + +static int bfd_symbols__cmpvalue(const void *a, const void *b) +{ + const asymbol *as = *(const asymbol **)a, *bs = *(const asymbol **)b; + + if (bfd_asymbol_value(as) != bfd_asymbol_value(bs)) + return bfd_asymbol_value(as) - bfd_asymbol_value(bs); + + return bfd_asymbol_name(as)[0] - bfd_asymbol_name(bs)[0]; +} + +static int bfd2elf_binding(asymbol *symbol) +{ + if (symbol->flags & BSF_WEAK) + return STB_WEAK; + if (symbol->flags & BSF_GLOBAL) + return STB_GLOBAL; + if (symbol->flags & BSF_LOCAL) + return STB_LOCAL; + return -1; +} + +int dso__load_bfd_symbols(struct dso *dso, const char *debugfile) +{ + int err = -1; + long symbols_size, symbols_count; + asection *section; + asymbol **symbols, *sym; + struct symbol *symbol; + bfd *abfd; + u_int i; + u64 start, len; + + abfd = bfd_openr(dso->long_name, NULL); + if (!abfd) + return -1; + + if (!bfd_check_format(abfd, bfd_object)) { + pr_debug2("%s: cannot read %s bfd file.\n", __func__, + dso->long_name); + goto out_close; + } + + if (bfd_get_flavour(abfd) == bfd_target_elf_flavour) + goto out_close; + + section = bfd_get_section_by_name(abfd, ".text"); + if (section) + dso->text_offset = section->vma - section->filepos; + + bfd_close(abfd); + + abfd = bfd_openr(debugfile, NULL); + if (!abfd) + return -1; + + if (!bfd_check_format(abfd, bfd_object)) { + pr_debug2("%s: cannot read %s bfd file.\n", __func__, + debugfile); + goto out_close; + } + + if (bfd_get_flavour(abfd) == bfd_target_elf_flavour) + goto out_close; + + symbols_size = bfd_get_symtab_upper_bound(abfd); + if (symbols_size == 0) { + bfd_close(abfd); + return 0; + } + + if (symbols_size < 0) + goto out_close; + + symbols = malloc(symbols_size); + if (!symbols) + goto out_close; + + symbols_count = bfd_canonicalize_symtab(abfd, symbols); + if (symbols_count < 0) + goto out_free; + + qsort(symbols, symbols_count, sizeof(asymbol *), bfd_symbols__cmpvalue); + +#ifdef bfd_get_section +#define bfd_asymbol_section bfd_get_section +#endif + for (i = 0; i < symbols_count; ++i) { + sym = symbols[i]; + section = bfd_asymbol_section(sym); + if (bfd2elf_binding(sym) < 0) + continue; + + while (i + 1 < symbols_count && + bfd_asymbol_section(symbols[i + 1]) == section && + bfd2elf_binding(symbols[i + 1]) < 0) + i++; + + if (i + 1 < symbols_count && + bfd_asymbol_section(symbols[i + 1]) == section) + len = symbols[i + 1]->value - sym->value; + else + len = section->size - sym->value; + + start = bfd_asymbol_value(sym) - dso->text_offset; + symbol = symbol__new(start, len, bfd2elf_binding(sym), STT_FUNC, + bfd_asymbol_name(sym)); + if (!symbol) + goto out_free; + + symbols__insert(&dso->symbols, symbol); + } +#ifdef bfd_get_section +#undef bfd_asymbol_section +#endif + + symbols__fixup_end(&dso->symbols); + symbols__fixup_duplicate(&dso->symbols); + dso->adjust_symbols = 1; + + err = 0; +out_free: + free(symbols); +out_close: + bfd_close(abfd); + return err; +} +#endif + static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod, enum dso_binary_type type) { @@ -1699,6 +1831,7 @@ int dso__load(struct dso *dso, struct map *map) bool next_slot = false; bool is_reg; bool nsexit; + int bfdrc = -1; int sirc = -1; enum dso_binary_type symtab_type = binary_type_symtab[i]; @@ -1717,12 +1850,19 @@ int dso__load(struct dso *dso, struct map *map) nsinfo__mountns_exit(&nsc); is_reg = is_regular_file(name); +#ifdef HAVE_LIBBFD_SUPPORT if (is_reg) + bfdrc = dso__load_bfd_symbols(dso, name); +#endif + if (is_reg && bfdrc < 0) sirc = symsrc__init(ss, dso, name, symtab_type); if (nsexit) nsinfo__mountns_enter(dso->nsinfo, &nsc); + if (bfdrc == 0) + break; + if (!is_reg || sirc < 0) continue; diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index ff4f4c47e148..11fe71f46d14 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -175,6 +175,10 @@ int symbol__config_symfs(const struct option *opt __maybe_unused, struct symsrc; +#ifdef HAVE_LIBBFD_SUPPORT +int dso__load_bfd_symbols(struct dso *dso, const char *debugfile); +#endif + int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, struct symsrc *runtime_ss, int kmodule); int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss); |