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runtime: stop using sigreturn on openbsd/386

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In future releases of OpenBSD, the sigreturn syscall will no longer
exist. As such, stop using sigreturn on openbsd/386 and just return
from the signal trampoline (as we already do for openbsd/amd64 and
openbsd/arm).

Change-Id: Ic4de1795bbfbfb062a685832aea0d597988c6985
Reviewed-on: https://go-review.googlesource.com/23024
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Joel Sing 2016-05-09 02:13:03 +10:00 committed by Minux Ma
parent 81b70f3751
commit 5bd37b8e78
1 changed files with 0 additions and 8 deletions
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8
src/runtime/sys_openbsd_386.s
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@ -214,14 +214,6 @@ TEXT runtime·sigtramp(SB),NOSPLIT,$12
MOVL context+8(FP), BX
MOVL BX, 8(SP)
CALL runtime·sigtrampgo(SB)
// call sigreturn
MOVL context+8(FP), AX
MOVL $0, 0(SP) // syscall gap
MOVL AX, 4(SP) // arg 1 - sigcontext
MOVL $103, AX // sys_sigreturn
INT $0x80
MOVL $0xf1, 0xf1 // crash
RET
// int32 tfork(void *param, uintptr psize, M *mp, G *gp, void (*fn)(void));