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-rw-r--r--tools/perf/util/unwind-libunwind.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c
index 371219a..6edf535 100644
--- a/tools/perf/util/unwind-libunwind.c
+++ b/tools/perf/util/unwind-libunwind.c
@@ -185,6 +185,28 @@ static u64 elf_section_offset(int fd, const char *name)
return offset;
}
+#ifndef NO_LIBUNWIND_DEBUG_FRAME
+static int elf_is_exec(int fd, const char *name)
+{
+ Elf *elf;
+ GElf_Ehdr ehdr;
+ int retval = 0;
+
+ elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
+ if (elf == NULL)
+ return 0;
+ if (gelf_getehdr(elf, &ehdr) == NULL)
+ goto out;
+
+ retval = (ehdr.e_type == ET_EXEC);
+
+out:
+ elf_end(elf);
+ pr_debug("unwind: elf_is_exec(%s): %d\n", name, retval);
+ return retval;
+}
+#endif
+
struct table_entry {
u32 start_ip_offset;
u32 fde_offset;
@@ -322,8 +344,12 @@ find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
#ifndef NO_LIBUNWIND_DEBUG_FRAME
/* Check the .debug_frame section for unwinding info */
if (!read_unwind_spec_debug_frame(map->dso, ui->machine, &segbase)) {
+ int fd = dso__data_fd(map->dso, ui->machine);
+ int is_exec = elf_is_exec(fd, map->dso->name);
+ unw_word_t base = is_exec ? 0 : map->start;
+
memset(&di, 0, sizeof(di));
- if (dwarf_find_debug_frame(0, &di, ip, 0, map->dso->name,
+ if (dwarf_find_debug_frame(0, &di, ip, base, map->dso->name,
map->start, map->end))
return dwarf_search_unwind_table(as, ip, &di, pi,
need_unwind_info, arg);
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