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| author | Michael Munday <munday@ca.ibm.com> | 2016-09-08 19:27:24 -0400 |
|---|---|---|
| committer | Michael Munday <munday@ca.ibm.com> | 2016-09-09 00:34:22 +0000 |
| commit | d38d59ffb5d56c838b1ed7cc346b8d63398b5452 (patch) | |
| tree | f38df1597e7d85529145a46c3419e0bb8445b41f /src/runtime/asm_s390x.s | |
| parent | 14ff7cc94c4e167dbd80c96996b43f96bb9c17fb (diff) | |
| download | go-d38d59ffb5d56c838b1ed7cc346b8d63398b5452.tar.gz go-d38d59ffb5d56c838b1ed7cc346b8d63398b5452.zip | |
runtime: fix SIGILL in checkvectorfacility on s390x
STFLE does not necessarily write to all the double-words that are
requested. It is therefore necessary to clear the target memory
before calling STFLE in order to ensure that the facility list does
not contain false positives.
Fixes #17032.
Change-Id: I7bec9ade7103e747b72f08562fe57e6f091bd89f
Reviewed-on: https://go-review.googlesource.com/28850
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Diffstat (limited to 'src/runtime/asm_s390x.s')
| -rw-r--r-- | src/runtime/asm_s390x.s | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/runtime/asm_s390x.s b/src/runtime/asm_s390x.s index cf0ed1a917..928fe37121 100644 --- a/src/runtime/asm_s390x.s +++ b/src/runtime/asm_s390x.s @@ -20,6 +20,7 @@ TEXT runtime·checkvectorfacility(SB),NOSPLIT,$32-0 MOVD $2, R0 MOVD R1, tmp-32(SP) MOVD $x-24(SP), R1 + XC $24, 0(R1), 0(R1) // STFLE 0(R1) WORD $0xB2B01000 MOVBZ z-8(SP), R1 |