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[dev.typeparams] runtime: call cgocallbackg indirectly on ARM64
This is CL 312669, for ARM64. cgocallback calls cgocallbackg after switching the stack. Call it indirectly to bypass the linker's nosplit check. In particular, this avoids a nosplit stack overflow on Windows when register ABI is enabled. Change-Id: I7054a750fb0ec2579d46004f94b46b6f7b9e3a21 Reviewed-on: https://go-review.googlesource.com/c/go/+/324734 Trust: Cherry Mui <cherryyz@google.com> Run-TryBot: Cherry Mui <cherryyz@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com>
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@ -1196,7 +1196,8 @@ havem:
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MOVD R1, 8(RSP)
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MOVD R2, 16(RSP)
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MOVD R3, 24(RSP)
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BL runtime·cgocallbackg(SB)
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MOVD $runtime·cgocallbackg(SB), R0
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CALL (R0) // indirect call to bypass nosplit check. We're on a different stack now.
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// Restore g->sched (== m->curg->sched) from saved values.
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MOVD 0(RSP), R5
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