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runtime: work around vet asmdecl checks for openbsd/386 mstart_stub

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Include a NOP with the SP in order to disable/bypass vet asmdecl checks
for runtime.mstart_stub on openbsd/386. Without this we get:

runtime/sys_openbsd_386.s:33:1: [386] mstart_stub: use of 32(SP) points beyond argument frame

Change-Id: I834ae3dbceffcb5776481b076ec2afe3700671cf
Reviewed-on: https://go-review.googlesource.com/c/go/+/315789
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
This commit is contained in:
Joel Sing 2021-05-01 04:47:00 +10:00
parent afa58ddf5a
commit c23a32284a
1 changed files with 2 additions and 0 deletions
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src/runtime/sys_openbsd_386.s
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@ -22,6 +22,8 @@ TEXT runtime·setldt(SB),NOSPLIT,$0
// It just does some low-level setup and then calls mstart.
// Note: called with the C calling convention.
TEXT runtime·mstart_stub(SB),NOSPLIT,$28
NOP SP // tell vet SP changed - stop checking offsets
// We are already on m's g0 stack.
// Save callee-save registers.