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linux-user: fix x86_64 safe_syscall

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Do what the comment says, test for signal_pending non-zero,
rather than the current code which tests for bit 0 non-zero.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2016-06-13 14:45:21 -07:00 committed by Riku Voipio
parent b9403979b5
commit 4eed9990a0
1 changed files with 3 additions and 3 deletions
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6
linux-user/host/x86_64/safe-syscall.inc.S
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@ -67,8 +67,8 @@ safe_syscall_base:
*/
safe_syscall_start:
/* if signal_pending is non-zero, don't do the call */
testl $1, (%rbp)
jnz return_ERESTARTSYS
cmpl $0, (%rbp)
jnz 1f
syscall
safe_syscall_end:
/* code path for having successfully executed the syscall */
@ -78,7 +78,7 @@ safe_syscall_end:
.cfi_restore rbp
ret
return_ERESTARTSYS:
1:
/* code path when we didn't execute the syscall */
.cfi_restore_state
mov $-TARGET_ERESTARTSYS, %rax