summaryrefslogtreecommitdiff
path: root/tools
diff options
context:
space:
mode:
authorJosh Poimboeuf <jpoimboe@redhat.com>2020-04-01 13:23:28 -0500
committerBorislav Petkov <bp@suse.de>2020-04-14 12:06:21 +0200
commitb401efc120a399dfda1f4d2858a4de365c9b08ef (patch)
tree37d61c763f9ead3e330547531b559f821195e264 /tools
parente81e0724432542af8d8c702c31e9d82f57b1ff31 (diff)
objtool: Fix switch table detection in .text.unlikely
If a switch jump table's indirect branch is in a ".cold" subfunction in .text.unlikely, objtool doesn't detect it, and instead prints a false warning: drivers/media/v4l2-core/v4l2-ioctl.o: warning: objtool: v4l_print_format.cold()+0xd6: sibling call from callable instruction with modified stack frame drivers/hwmon/max6650.o: warning: objtool: max6650_probe.cold()+0xa5: sibling call from callable instruction with modified stack frame drivers/media/dvb-frontends/drxk_hard.o: warning: objtool: init_drxk.cold()+0x16f: sibling call from callable instruction with modified stack frame Fix it by comparing the function, instead of the section and offset. Fixes: 13810435b9a7 ("objtool: Support GCC 8's cold subfunctions") Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Miroslav Benes <mbenes@suse.cz> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/157c35d42ca9b6354bbb1604fe9ad7d1153ccb21.1585761021.git.jpoimboe@redhat.com
Diffstat (limited to 'tools')
-rw-r--r--tools/objtool/check.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 481132539384..cb2d299664e7 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1050,10 +1050,7 @@ static struct rela *find_jump_table(struct objtool_file *file,
* it.
*/
for (;
- &insn->list != &file->insn_list &&
- insn->sec == func->sec &&
- insn->offset >= func->offset;
-
+ &insn->list != &file->insn_list && insn->func && insn->func->pfunc == func;
insn = insn->first_jump_src ?: list_prev_entry(insn, list)) {
if (insn != orig_insn && insn->type == INSN_JUMP_DYNAMIC)