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| author | Alan Modra <amodra@gmail.com> | 2023-12-15 10:04:48 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2023-12-15 12:56:45 +1030 |
| commit | e838a672aa787fb593d4819fa4836cad7db49e66 (patch) | |
| tree | d5c91d4812dbcfa36fcc84b62c72f300db2a5957 /binutils | |
| parent | b291c12e8d08d01e598526ac6c9cb20543f41293 (diff) | |
| download | gdb-e838a672aa787fb593d4819fa4836cad7db49e66.zip gdb-e838a672aa787fb593d4819fa4836cad7db49e66.tar.gz gdb-e838a672aa787fb593d4819fa4836cad7db49e66.tar.bz2 | |
Re: readelf..debug-dump=loc displays bogus base addresses
Commit b05efa39b479 removed checks I added in commit f22f27f46c75 to
prevent segfaults when debug_info_p is NULL, which can be the case
with fuzzed objects. Restore those checks. Also, for dwo look at
rnglists_dwo rather than rnglists.
Diffstat (limited to 'binutils')
| -rw-r--r-- | binutils/dwarf.c | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/binutils/dwarf.c b/binutils/dwarf.c index 1504690..b5e5ea8 100644 --- a/binutils/dwarf.c +++ b/binutils/dwarf.c @@ -2771,7 +2771,9 @@ read_and_display_attr_value (unsigned long attribute, if (form == DW_FORM_loclistx) { - if (dwo) + if (debug_info_p == NULL) + idx = -1; + else if (dwo) { idx = fetch_indexed_offset (uvalue, loclists_dwo, debug_info_p->loclists_base, @@ -2779,7 +2781,7 @@ read_and_display_attr_value (unsigned long attribute, if (idx != (uint64_t) -1) idx += (offset_size == 8) ? 20 : 12; } - else if (debug_info_p == NULL || dwarf_version > 4) + else if (dwarf_version > 4) { idx = fetch_indexed_offset (uvalue, loclists, debug_info_p->loclists_base, @@ -2804,21 +2806,13 @@ read_and_display_attr_value (unsigned long attribute, } else if (form == DW_FORM_rnglistx) { - if (dwo) - { - idx = fetch_indexed_offset (uvalue, rnglists, - debug_info_p->rnglists_base, - debug_info_p->offset_size); - } + if (debug_info_p == NULL) + idx = -1; else - { - if (debug_info_p == NULL) - base = 0; - else - base = debug_info_p->rnglists_base; - idx = fetch_indexed_offset (uvalue, rnglists, base, - debug_info_p->offset_size); - } + idx = fetch_indexed_offset (uvalue, + dwo ? rnglists_dwo : rnglists, + debug_info_p->rnglists_base, + debug_info_p->offset_size); } else { |