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| author | Stefan Liebler <stli@linux.ibm.com> | 2024-02-22 15:03:27 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2024-02-26 13:37:46 +0100 |
| commit | 02782fd12849b6673cb5c2728cb750e8ec295aa3 (patch) | |
| tree | 59524fadd808d68650a173b490b3495f68c4d745 /sysdeps/unix/sysv/linux/s390 | |
| parent | 9f78a7c1d0963282608da836b840f0d5ae1c478e (diff) | |
| download | glibc-02782fd12849b6673cb5c2728cb750e8ec295aa3.tar glibc-02782fd12849b6673cb5c2728cb750e8ec295aa3.tar.gz glibc-02782fd12849b6673cb5c2728cb750e8ec295aa3.tar.bz2 glibc-02782fd12849b6673cb5c2728cb750e8ec295aa3.zip | |
S390: Do not clobber r7 in clone [BZ #31402]
Starting with commit e57d8fc97b90127de4ed3e3a9cdf663667580935
"S390: Always use svc 0"
clone clobbers the call-saved register r7 in error case:
function or stack is NULL.
This patch restores the saved registers also in the error case.
Furthermore the existing test misc/tst-clone is extended to check
all error cases and that clone does not clobber registers in this
error case.
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-32/clone.S | 1 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/clone.S | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/clone.S b/sysdeps/unix/sysv/linux/s390/s390-32/clone.S index 4c882ef2ee..a7a863242c 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/clone.S +++ b/sysdeps/unix/sysv/linux/s390/s390-32/clone.S @@ -53,6 +53,7 @@ ENTRY(__clone) br %r14 error: lhi %r2,-EINVAL + lm %r6,%r7,24(%r15) /* Load registers. */ j SYSCALL_ERROR_LABEL PSEUDO_END (__clone) diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/clone.S b/sysdeps/unix/sysv/linux/s390/s390-64/clone.S index 4eb104be71..c552a6b8de 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/clone.S +++ b/sysdeps/unix/sysv/linux/s390/s390-64/clone.S @@ -54,6 +54,7 @@ ENTRY(__clone) br %r14 error: lghi %r2,-EINVAL + lmg %r6,%r7,48(%r15) /* Restore registers. */ jg SYSCALL_ERROR_LABEL PSEUDO_END (__clone) |