diff options
| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2017-06-28 10:11:07 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-06-30 10:19:19 +0200 |
| commit | baa41469a7b992c1e3db2a39854219cc7442e48f (patch) | |
| tree | 1a8e43a0d5e27db457c1cc6f8a4510b258b46bee /tools/objtool/special.c | |
| parent | c207aee48037abca71c669cbec407b9891965c34 (diff) | |
| download | lwn-baa41469a7b992c1e3db2a39854219cc7442e48f.tar.gz lwn-baa41469a7b992c1e3db2a39854219cc7442e48f.zip | |
objtool: Implement stack validation 2.0
This is a major rewrite of objtool. Instead of only tracking frame
pointer changes, it now tracks all stack-related operations, including
all register saves/restores.
In addition to making stack validation more robust, this also paves the
way for undwarf generation.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: live-patching@vger.kernel.org
Link: http://lkml.kernel.org/r/678bd94c0566c6129bcc376cddb259c4c5633004.1498659915.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/objtool/special.c')
| -rw-r--r-- | tools/objtool/special.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/objtool/special.c b/tools/objtool/special.c index bff8abb3a4aa..84f001d52322 100644 --- a/tools/objtool/special.c +++ b/tools/objtool/special.c @@ -91,16 +91,16 @@ static int get_alt_entry(struct elf *elf, struct special_entry *entry, alt->jump_or_nop = entry->jump_or_nop; if (alt->group) { - alt->orig_len = *(unsigned char *)(sec->data + offset + + alt->orig_len = *(unsigned char *)(sec->data->d_buf + offset + entry->orig_len); - alt->new_len = *(unsigned char *)(sec->data + offset + + alt->new_len = *(unsigned char *)(sec->data->d_buf + offset + entry->new_len); } if (entry->feature) { unsigned short feature; - feature = *(unsigned short *)(sec->data + offset + + feature = *(unsigned short *)(sec->data->d_buf + offset + entry->feature); /* |