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alpha: fix handling of a3 on straced syscalls

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For successful syscall that happens to return a negative, we want
a3 set to 0, no matter whether it's straced or not.  As it is,
for straced case we leave the value it used to have on syscall
entry.  Easily fixed, fortunately...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2021-09-18 18:27:12 -04:00
parent f7b2431a6d
commit 19a09e4268
1 changed files with 1 additions and 1 deletions
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2
arch/alpha/kernel/entry.S
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@@ -600,8 +600,8 @@ ret_from_straced:
/* check return.. */
blt $0, $strace_error /* the call failed */
stq $31, 72($sp) /* a3=0 => no error */
$strace_success:
stq $31, 72($sp) /* a3=0 => no error */
stq $0, 0($sp) /* save return value */
DO_SWITCH_STACK