* arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9 ud0 %ecx,%ebp
@ 2018-02-07 22:04 kbuild test robot
2018-02-08 14:34 ` Masami Hiramatsu
0 siblings, 1 reply; 4+ messages in thread
From: kbuild test robot @ 2018-02-07 22:04 UTC (permalink / raw)
To: Masami Hiramatsu; +Cc: kbuild-all, linux-kernel, Ingo Molnar
[-- Attachment #1: Type: text/plain, Size: 11099 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 7590e37bdaeec25ae325f4ba450be13e2aac6c8d
commit: 10c91577d5e631773a6394e14cf60125389b71ae x86/tools: Standardize output format of insn_decode_test
date: 8 weeks ago
config: x86_64-randconfig-s2-02072130 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
git checkout 10c91577d5e631773a6394e14cf60125389b71ae
# save the attached .config to linux build tree
make ARCH=x86_64
All warnings (new ones prefixed by >>):
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
>> arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9 ud0 %ecx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff8100207e: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81002218: 0f ff e9 ud0 %ecx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81002317: 0f ff e9 ud0 %ecx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff810029f4: 0f ff e9 ud0 %ecx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81002af4: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81002c27: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81002da5: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81002dd5: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81002eda: 0f ff 65 8b ud0 -0x75(%rbp),%esp
arch/x86/tools/insn_decoder_test: warning: objdump says 4 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81002f58: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff810030c6: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81003158: 0f ff 5b 5d ud0 0x5d(%rbx),%ebx
arch/x86/tools/insn_decoder_test: warning: objdump says 4 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff8100404c: 0f ff 5b 5d ud0 0x5d(%rbx),%ebx
arch/x86/tools/insn_decoder_test: warning: objdump says 4 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81004053: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81004056: f7 0f ff eb ab 0f testl $0xfabebff,(%rdi)
arch/x86/tools/insn_decoder_test: warning: objdump says 6 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81005004: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81005039: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff810052a4: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81005889: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff8100588d: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff810059a1: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81005a3a: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff8100609f: 0f ff c3 ud0 %ebx,%eax
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff8100617c: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff8100620a: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff8100652b: 0f ff c3 ud0 %ebx,%eax
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff8100655a: 0f ff e9 ud0 %ecx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff810069ce: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81007332: 0f ff c3 ud0 %ebx,%eax
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81007382: 0f ff c3 ud0 %ebx,%eax
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81007c1f: 0f ff 41 8b ud0 -0x75(%rcx),%eax
arch/x86/tools/insn_decoder_test: warning: objdump says 4 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81007c2f: 0f ff eb ud0 %ebx,%ebp
arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
arch/x86/tools/insn_decoder_test: warning: ffffffff81008a3c: 0f ff 5b 5d ud0 0x5d(%rbx),%ebx
arch/x86/tools/insn_decoder_test: warning: objdump says 4 bytes, but insn_get_length() says 2
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9 ud0 %ecx,%ebp
2018-02-07 22:04 arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9 ud0 %ecx,%ebp kbuild test robot
@ 2018-02-08 14:34 ` Masami Hiramatsu
2018-02-09 0:30 ` [kbuild-all] arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9 ud0 %ecx, %ebp Hao, Shun
0 siblings, 1 reply; 4+ messages in thread
From: Masami Hiramatsu @ 2018-02-08 14:34 UTC (permalink / raw)
To: kbuild test robot; +Cc: kbuild-all, linux-kernel, Ingo Molnar
On Thu, 8 Feb 2018 06:04:45 +0800
kbuild test robot <fengguang.wu@intel.com> wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 7590e37bdaeec25ae325f4ba450be13e2aac6c8d
> commit: 10c91577d5e631773a6394e14cf60125389b71ae x86/tools: Standardize output format of insn_decode_test
> date: 8 weeks ago
> config: x86_64-randconfig-s2-02072130 (attached as .config)
> compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
> reproduce:
> git checkout 10c91577d5e631773a6394e14cf60125389b71ae
> # save the attached .config to linux build tree
> make ARCH=x86_64
>
> All warnings (new ones prefixed by >>):
>
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> >> arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9 ud0 %ecx,%ebp
Does UD0 really take an operand? Hmm, indeed, the latest Intel SDM (December2017) says
NOTES:
1. Some older processors decode the UD0 instruction without a ModR/M byte. As a result, those processors would deliver an invalid-
opcode exception instead of a fault on instruction fetch when the instruction with a ModR/M byte (and any implied bytes) would
cross a page or segment boundary.
and older SDM (e.g. March 2017) says UD0 has no modrm byte.
It is easy to change x86-opecode-map.txt, but this means this test may fail with older objdump...
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff8100207e: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81002218: 0f ff e9 ud0 %ecx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81002317: 0f ff e9 ud0 %ecx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff810029f4: 0f ff e9 ud0 %ecx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81002af4: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81002c27: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81002da5: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81002dd5: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81002eda: 0f ff 65 8b ud0 -0x75(%rbp),%esp
> arch/x86/tools/insn_decoder_test: warning: objdump says 4 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81002f58: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff810030c6: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81003158: 0f ff 5b 5d ud0 0x5d(%rbx),%ebx
> arch/x86/tools/insn_decoder_test: warning: objdump says 4 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff8100404c: 0f ff 5b 5d ud0 0x5d(%rbx),%ebx
> arch/x86/tools/insn_decoder_test: warning: objdump says 4 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81004053: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81004056: f7 0f ff eb ab 0f testl $0xfabebff,(%rdi)
> arch/x86/tools/insn_decoder_test: warning: objdump says 6 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81005004: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81005039: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff810052a4: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81005889: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff8100588d: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff810059a1: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81005a3a: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff8100609f: 0f ff c3 ud0 %ebx,%eax
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff8100617c: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff8100620a: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff8100652b: 0f ff c3 ud0 %ebx,%eax
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff8100655a: 0f ff e9 ud0 %ecx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff810069ce: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81007332: 0f ff c3 ud0 %ebx,%eax
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81007382: 0f ff c3 ud0 %ebx,%eax
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81007c1f: 0f ff 41 8b ud0 -0x75(%rcx),%eax
> arch/x86/tools/insn_decoder_test: warning: objdump says 4 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81007c2f: 0f ff eb ud0 %ebx,%ebp
> arch/x86/tools/insn_decoder_test: warning: objdump says 3 bytes, but insn_get_length() says 2
> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug, please report this.
> arch/x86/tools/insn_decoder_test: warning: ffffffff81008a3c: 0f ff 5b 5d ud0 0x5d(%rbx),%ebx
> arch/x86/tools/insn_decoder_test: warning: objdump says 4 bytes, but insn_get_length() says 2
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
--
Masami Hiramatsu <mhiramat@kernel.org>
^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: [kbuild-all] arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9 ud0 %ecx, %ebp
2018-02-08 14:34 ` Masami Hiramatsu
@ 2018-02-09 0:30 ` Hao, Shun
2018-02-10 16:01 ` Masami Hiramatsu
0 siblings, 1 reply; 4+ messages in thread
From: Hao, Shun @ 2018-02-09 0:30 UTC (permalink / raw)
To: Masami Hiramatsu, Wu, Fengguang
Cc: Ingo Molnar, kbuild-all, linux-kernel, Hao, Shun
Thanks Masami, so that explains why a lot of these warnings come out just after
we upgrading to gcc-7.3 (now the objdump version is 2.30).
Currently we've already ignore these warnings and won't send this report.
>-----Original Message-----
>From: kbuild-all [mailto:kbuild-all-bounces@lists.01.org] On Behalf Of Masami
>Hiramatsu
>Sent: Thursday, February 8, 2018 10:34 PM
>To: Wu, Fengguang <fengguang.wu@intel.com>
>Cc: Ingo Molnar <mingo@kernel.org>; kbuild-all@01.org; linux-
>kernel@vger.kernel.org
>Subject: Re: [kbuild-all] arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac:
>0f ff e9 ud0 %ecx, %ebp
>
>On Thu, 8 Feb 2018 06:04:45 +0800
>kbuild test robot <fengguang.wu@intel.com> wrote:
>
>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head: 7590e37bdaeec25ae325f4ba450be13e2aac6c8d
>> commit: 10c91577d5e631773a6394e14cf60125389b71ae x86/tools: Standardize
>output format of insn_decode_test
>> date: 8 weeks ago
>> config: x86_64-randconfig-s2-02072130 (attached as .config)
>> compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
>> reproduce:
>> git checkout 10c91577d5e631773a6394e14cf60125389b71ae
>> # save the attached .config to linux build tree
>> make ARCH=x86_64
>>
>> All warnings (new ones prefixed by >>):
>>
>> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug,
>please report this.
>> >> arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9
> ud0 %ecx,%ebp
>
>Does UD0 really take an operand? Hmm, indeed, the latest Intel SDM (December2017)
>says
>
>NOTES:
>1. Some older processors decode the UD0 instruction without a ModR/M byte. As a
>result, those processors would deliver an invalid-
>opcode exception instead of a fault on instruction fetch when the instruction with a
>ModR/M byte (and any implied bytes) would
>cross a page or segment boundary.
>
>and older SDM (e.g. March 2017) says UD0 has no modrm byte.
>It is easy to change x86-opecode-map.txt, but this means this test may fail with older
>objdump...
>
>>
>> ---
>> 0-DAY kernel test infrastructure Open Source Technology Center
>> https://lists.01.org/pipermail/kbuild-all Intel Corporation
>
>
>--
>Masami Hiramatsu <mhiramat@kernel.org>
>_______________________________________________
>kbuild-all mailing list
>kbuild-all@lists.01.org
>https://lists.01.org/mailman/listinfo/kbuild-all
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [kbuild-all] arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9 ud0 %ecx, %ebp
2018-02-09 0:30 ` [kbuild-all] arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9 ud0 %ecx, %ebp Hao, Shun
@ 2018-02-10 16:01 ` Masami Hiramatsu
0 siblings, 0 replies; 4+ messages in thread
From: Masami Hiramatsu @ 2018-02-10 16:01 UTC (permalink / raw)
To: Hao, Shun; +Cc: Wu, Fengguang, Ingo Molnar, kbuild-all, linux-kernel
Hi,
On Fri, 9 Feb 2018 00:30:20 +0000
"Hao, Shun" <shun.hao@intel.com> wrote:
> Thanks Masami, so that explains why a lot of these warnings come out just after
> we upgrading to gcc-7.3 (now the objdump version is 2.30).
> Currently we've already ignore these warnings and won't send this report.
Anyway, it must be fixed with the below patch.
https://lkml.org/lkml/2018/2/8/350
(Sorry, I replyed to another warning mail)
Thank you,
>
> >-----Original Message-----
> >From: kbuild-all [mailto:kbuild-all-bounces@lists.01.org] On Behalf Of Masami
> >Hiramatsu
> >Sent: Thursday, February 8, 2018 10:34 PM
> >To: Wu, Fengguang <fengguang.wu@intel.com>
> >Cc: Ingo Molnar <mingo@kernel.org>; kbuild-all@01.org; linux-
> >kernel@vger.kernel.org
> >Subject: Re: [kbuild-all] arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac:
> >0f ff e9 ud0 %ecx, %ebp
> >
> >On Thu, 8 Feb 2018 06:04:45 +0800
> >kbuild test robot <fengguang.wu@intel.com> wrote:
> >
> >> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> >> head: 7590e37bdaeec25ae325f4ba450be13e2aac6c8d
> >> commit: 10c91577d5e631773a6394e14cf60125389b71ae x86/tools: Standardize
> >output format of insn_decode_test
> >> date: 8 weeks ago
> >> config: x86_64-randconfig-s2-02072130 (attached as .config)
> >> compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
> >> reproduce:
> >> git checkout 10c91577d5e631773a6394e14cf60125389b71ae
> >> # save the attached .config to linux build tree
> >> make ARCH=x86_64
> >>
> >> All warnings (new ones prefixed by >>):
> >>
> >> arch/x86/tools/insn_decoder_test: warning: Found an x86 instruction decoder bug,
> >please report this.
> >> >> arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9
> > ud0 %ecx,%ebp
> >
> >Does UD0 really take an operand? Hmm, indeed, the latest Intel SDM (December2017)
> >says
> >
> >NOTES:
> >1. Some older processors decode the UD0 instruction without a ModR/M byte. As a
> >result, those processors would deliver an invalid-
> >opcode exception instead of a fault on instruction fetch when the instruction with a
> >ModR/M byte (and any implied bytes) would
> >cross a page or segment boundary.
> >
> >and older SDM (e.g. March 2017) says UD0 has no modrm byte.
> >It is easy to change x86-opecode-map.txt, but this means this test may fail with older
> >objdump...
> >
> >>
> >> ---
> >> 0-DAY kernel test infrastructure Open Source Technology Center
> >> https://lists.01.org/pipermail/kbuild-all Intel Corporation
> >
> >
> >--
> >Masami Hiramatsu <mhiramat@kernel.org>
> >_______________________________________________
> >kbuild-all mailing list
> >kbuild-all@lists.01.org
> >https://lists.01.org/mailman/listinfo/kbuild-all
--
Masami Hiramatsu <mhiramat@kernel.org>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2018-02-10 16:01 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-02-07 22:04 arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9 ud0 %ecx,%ebp kbuild test robot
2018-02-08 14:34 ` Masami Hiramatsu
2018-02-09 0:30 ` [kbuild-all] arch/x86/tools/insn_decoder_test: warning: ffffffff810005ac: 0f ff e9 ud0 %ecx, %ebp Hao, Shun
2018-02-10 16:01 ` Masami Hiramatsu
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