From bcf7ef56daca2eacf836d22eee23c66f7cd96a65 Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Tue, 5 Dec 2023 12:53:08 -0700 Subject: x86/tools: objdump_reformat.awk: Skip bad instructions from llvm-objdump When running the instruction decoder selftest with LLVM=1 and CONFIG_PVH=y, there is a series of warnings: arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this. arch/x86/tools/insn_decoder_test: warning: ffffffff81000050 ea arch/x86/tools/insn_decoder_test: warning: objdump says 1 bytes, but insn_get_length() says 7 arch/x86/tools/insn_decoder_test: warning: Decoded and checked 7214721 instructions with 1 failures GNU objdump outputs "(bad)" instead of "", which is already handled in the bad_expr regex, so there is no warning. $ objdump -d arch/x86/platform/pvh/head.o | grep -E '50:\s+ea' 50: ea (bad) $ llvm-objdump -d arch/x86/platform/pvh/head.o | grep -E '50:\s+ea' 50: ea Add "" to the bad_expr regex to clear up the warning, allowing the instruction decoder selftest to fully pass with llvm-objdump. Signed-off-by: Nathan Chancellor Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20231205-objdump_reformat-awk-handle-llvm-objdump-bad_expr-v1-1-b4a74f39396f@kernel.org --- arch/x86/tools/objdump_reformat.awk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/x86/tools/objdump_reformat.awk') diff --git a/arch/x86/tools/objdump_reformat.awk b/arch/x86/tools/objdump_reformat.awk index a4120d907277..20b08a6c4d33 100644 --- a/arch/x86/tools/objdump_reformat.awk +++ b/arch/x86/tools/objdump_reformat.awk @@ -11,7 +11,7 @@ BEGIN { prev_addr = "" prev_hex = "" prev_mnemonic = "" - bad_expr = "(\\(bad\\)|^rex|^.byte|^rep(z|nz)$|^lock$|^es$|^cs$|^ss$|^ds$|^fs$|^gs$|^data(16|32)$|^addr(16|32|64))" + bad_expr = "(\\(bad\\)||^rex|^.byte|^rep(z|nz)$|^lock$|^es$|^cs$|^ss$|^ds$|^fs$|^gs$|^data(16|32)$|^addr(16|32|64))" fwait_expr = "^9b[ \t]*fwait" fwait_str="9b\tfwait" } -- cgit v1.2.3