Messages in this thread Patch in this message | | | From | Josh Poimboeuf <> | Subject | [PATCH] Revert "objtool: Support addition to set CFA base" | Date | Wed, 12 Apr 2023 10:29:01 -0700 |
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Commit 468af56a7bba ("objtool: Support addition to set CFA base") was added as a preparatory patch for arm64 support, but that support never came. It triggers a false positive warning on x86, so just revert it for now.
Fixes the following warning:
vmlinux.o: warning: objtool: cdce925_regmap_i2c_write+0xdb: stack state mismatch: cfa1=4+120 cfa2=5+40
Fixes: 468af56a7bba ("objtool: Support addition to set CFA base") Reported-by: kernel test robot <lkp@intel.com> Link: https://lore.kernel.org/oe-kbuild-all/202304080538.j5G6h1AB-lkp@intel.com/ Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> --- tools/objtool/check.c | 11 ----------- 1 file changed, 11 deletions(-)
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 34bd6a11bddd..7b78ffdc55fe 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -2978,17 +2978,6 @@ static int update_cfi_state(struct instruction *insn, break; } - if (!cfi->drap && op->src.reg == CFI_SP && - op->dest.reg == CFI_BP && cfa->base == CFI_SP && - check_reg_frame_pos(®s[CFI_BP], -cfa->offset + op->src.offset)) { - - /* lea disp(%rsp), %rbp */ - cfa->base = CFI_BP; - cfa->offset -= op->src.offset; - cfi->bp_scratch = false; - break; - } - if (op->src.reg == CFI_SP && cfa->base == CFI_SP) { /* drap: lea disp(%rsp), %drap */ -- 2.39.2
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