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| author | Nicholas Piggin <npiggin@gmail.com> | 2021-05-20 11:00:36 -0300 |
|---|---|---|
| committer | Matheus Castanho <msc@linux.ibm.com> | 2021-05-24 17:01:40 -0300 |
| commit | 7de36744ee1325f35d3fe0ca079dd33c40b12267 (patch) | |
| tree | bd0e5c1b564964f1922aab977f907b801319ecb5 /sysdeps/powerpc | |
| parent | 79aec841029c160a85f46564f8bad132af008e30 (diff) | |
| download | glibc-7de36744ee1325f35d3fe0ca079dd33c40b12267.zip glibc-7de36744ee1325f35d3fe0ca079dd33c40b12267.tar.gz glibc-7de36744ee1325f35d3fe0ca079dd33c40b12267.tar.bz2 | |
powerpc: Fix handling of scv return error codes [BZ #27892]
When using scv for templated ASM syscalls, current code interprets any
negative return value as error, but the only valid error codes are in
the range -4095..-1 according to the ABI.
This commit also fixes 'signal.gen.test' strace test, where the issue
was first identified.
Reviewed-by: Matheus Castanho <msc@linux.ibm.com>
Diffstat (limited to 'sysdeps/powerpc')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/sysdep.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sysdeps/powerpc/powerpc64/sysdep.h b/sysdeps/powerpc/powerpc64/sysdep.h index c57bb1c..1ea4c3b 100644 --- a/sysdeps/powerpc/powerpc64/sysdep.h +++ b/sysdeps/powerpc/powerpc64/sysdep.h @@ -398,8 +398,9 @@ LT_LABELSUFFIX(name,_name_end): ; \ #endif #define RET_SCV \ - cmpdi r3,0; \ - bgelr+; \ + li r9,-4095; \ + cmpld r3,r9; \ + bltlr+; \ neg r3,r3; #define RET_SC \ |