Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool fixes from Thomas Gleixner:
"Two small fixes for objtool:
- Support frame pointer setup via 'lea (%rsp), %rbp' which was not
yet supported and caused build warnings
- Disable unreacahble warnings for GCC4.4 and older to avoid false
positives caused by the compiler itself"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Support unoptimized frame pointer setup
objtool: Skip unreachable warnings for GCC 4.4 and older
+10
-3
+2
scripts/Makefile.build
+2
scripts/Makefile.build
+8
-3
tools/objtool/arch/x86/decode.c
+8
-3
tools/objtool/arch/x86/decode.c
···
284
284
case 0x8d:
285
285
if (sib == 0x24 && rex_w && !rex_b && !rex_x) {
286
286
287
-
/* lea disp(%rsp), reg */
288
287
*type = INSN_STACK;
289
-
op->src.type = OP_SRC_ADD;
288
+
if (!insn.displacement.value) {
289
+
/* lea (%rsp), reg */
290
+
op->src.type = OP_SRC_REG;
291
+
} else {
292
+
/* lea disp(%rsp), reg */
293
+
op->src.type = OP_SRC_ADD;
294
+
op->src.offset = insn.displacement.value;
295
+
}
290
296
op->src.reg = CFI_SP;
291
-
op->src.offset = insn.displacement.value;
292
297
op->dest.type = OP_DEST_REG;
293
298
op->dest.reg = op_to_cfi_reg[modrm_reg][rex_r];
294
299