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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2025-04-23 09:58:15 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-02 08:01:48 +0200 |
| commit | 6a06d9283db89477bb9823ce5c407ba887f3273c (patch) | |
| tree | e8df2769db8e064c303994a59100866276e97013 /tools | |
| parent | b35f792a31e1a9840ceb2bc5d3227e4f2e9e6b66 (diff) | |
| download | linux-6a06d9283db89477bb9823ce5c407ba887f3273c.tar.gz linux-6a06d9283db89477bb9823ce5c407ba887f3273c.tar.bz2 linux-6a06d9283db89477bb9823ce5c407ba887f3273c.zip | |
x86/insn: Fix CTEST instruction decoding
commit 85fd85bc025a525354acb2241beb3c5387c551ec upstream.
insn_decoder_test found a problem with decoding APX CTEST instructions:
Found an x86 instruction decoder bug, please report this.
ffffffff810021df 62 54 94 05 85 ff ctestneq
objdump says 6 bytes, but insn_get_length() says 5
It happens because x86-opcode-map.txt doesn't specify arguments for the
instruction and the decoder doesn't expect to see ModRM byte.
Fixes: 690ca3a3067f ("x86/insn: Add support for APX EVEX instructions to the opcode map")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v6.10+
Link: https://lore.kernel.org/r/20250423065815.2003231-1-kirill.shutemov@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/arch/x86/lib/x86-opcode-map.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/arch/x86/lib/x86-opcode-map.txt b/tools/arch/x86/lib/x86-opcode-map.txt index caedb3ef6688..f5dd84eb55dc 100644 --- a/tools/arch/x86/lib/x86-opcode-map.txt +++ b/tools/arch/x86/lib/x86-opcode-map.txt @@ -996,8 +996,8 @@ AVXcode: 4 83: Grp1 Ev,Ib (1A),(es) # CTESTSCC instructions are: CTESTB, CTESTBE, CTESTF, CTESTL, CTESTLE, CTESTNB, CTESTNBE, CTESTNL, # CTESTNLE, CTESTNO, CTESTNS, CTESTNZ, CTESTO, CTESTS, CTESTT, CTESTZ -84: CTESTSCC (ev) -85: CTESTSCC (es) | CTESTSCC (66),(es) +84: CTESTSCC Eb,Gb (ev) +85: CTESTSCC Ev,Gv (es) | CTESTSCC Ev,Gv (66),(es) 88: POPCNT Gv,Ev (es) | POPCNT Gv,Ev (66),(es) 8f: POP2 Bq,Rq (000),(11B),(ev) a5: SHLD Ev,Gv,CL (es) | SHLD Ev,Gv,CL (66),(es) |