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runtime: convert openbsd/amd64 locking to libc
Switch openbsd/amd64 to locking via libc, rather than performing direct system calls. Update #36435 Change-Id: I5e92bd70ce557b78ff385577088a9775cc468ea9 Reviewed-on: https://go-review.googlesource.com/c/go/+/270378 Trust: Joel Sing <joel@sing.id.au> Run-TryBot: Joel Sing <joel@sing.id.au> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
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@ -46,14 +46,6 @@ func raiseproc(sig uint32)
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func getthrid() int32
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func thrkill(tid int32, sig int)
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//go:noescape
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func thrsleep(ident uintptr, clock_id int32, tsp *timespec, lock uintptr, abort *uint32) int32
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//go:noescape
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func thrwakeup(ident uintptr, n int32) int32
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func osyield()
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func kqueue() int32
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//go:noescape
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15
src/runtime/os_openbsd_syscall1.go
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15
src/runtime/os_openbsd_syscall1.go
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@ -0,0 +1,15 @@
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build openbsd,!amd64
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package runtime
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//go:noescape
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func thrsleep(ident uintptr, clock_id int32, tsp *timespec, lock uintptr, abort *uint32) int32
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//go:noescape
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func thrwakeup(ident uintptr, n int32) int32
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func osyield()
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34
src/runtime/sys_openbsd1.go
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34
src/runtime/sys_openbsd1.go
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@ -0,0 +1,34 @@
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// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build openbsd,amd64
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package runtime
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import "unsafe"
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//go:nosplit
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//go:cgo_unsafe_args
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func thrsleep(ident uintptr, clock_id int32, tsp *timespec, lock uintptr, abort *uint32) int32 {
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return libcCall(unsafe.Pointer(funcPC(thrsleep_trampoline)), unsafe.Pointer(&ident))
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}
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func thrsleep_trampoline()
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//go:nosplit
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//go:cgo_unsafe_args
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func thrwakeup(ident uintptr, n int32) int32 {
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return libcCall(unsafe.Pointer(funcPC(thrwakeup_trampoline)), unsafe.Pointer(&ident))
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}
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func thrwakeup_trampoline()
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func osyield() {
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libcCall(unsafe.Pointer(funcPC(sched_yield_trampoline)), unsafe.Pointer(nil))
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}
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func sched_yield_trampoline()
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//go:cgo_import_dynamic libc_thrsleep __thrsleep "libc.so"
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//go:cgo_import_dynamic libc_thrwakeup __thrwakeup "libc.so"
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//go:cgo_import_dynamic libc_sched_yield sched_yield "libc.so"
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//go:cgo_import_dynamic _ _ "libc.so"
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@ -168,28 +168,32 @@ TEXT runtime·pthread_kill_trampoline(SB),NOSPLIT,$0
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POPQ BP
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RET
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TEXT runtime·osyield(SB),NOSPLIT,$0
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MOVL $298, AX // sys_sched_yield
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SYSCALL
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TEXT runtime·thrsleep_trampoline(SB),NOSPLIT,$0
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PUSHQ BP
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MOVQ SP, BP
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MOVL 8(DI), SI // arg 2 - clock_id
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MOVQ 16(DI), DX // arg 3 - abstime
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MOVQ 24(DI), CX // arg 3 - lock
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MOVQ 32(DI), R8 // arg 4 - abort
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MOVQ 0(DI), DI // arg 1 - id
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CALL libc_thrsleep(SB)
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POPQ BP
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RET
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TEXT runtime·thrsleep(SB),NOSPLIT,$0
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MOVQ ident+0(FP), DI // arg 1 - ident
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MOVL clock_id+8(FP), SI // arg 2 - clock_id
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MOVQ tsp+16(FP), DX // arg 3 - tp
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MOVQ lock+24(FP), R10 // arg 4 - lock
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MOVQ abort+32(FP), R8 // arg 5 - abort
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MOVL $94, AX // sys___thrsleep
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SYSCALL
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MOVL AX, ret+40(FP)
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TEXT runtime·thrwakeup_trampoline(SB),NOSPLIT,$0
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PUSHQ BP
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MOVQ SP, BP
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MOVL 8(DI), SI // arg 2 - count
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MOVQ 0(DI), DI // arg 1 - id
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CALL libc_thrwakeup(SB)
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POPQ BP
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RET
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TEXT runtime·thrwakeup(SB),NOSPLIT,$0
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MOVQ ident+0(FP), DI // arg 1 - ident
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MOVL n+8(FP), SI // arg 2 - n
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MOVL $301, AX // sys___thrwakeup
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SYSCALL
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MOVL AX, ret+16(FP)
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TEXT runtime·sched_yield_trampoline(SB),NOSPLIT,$0
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PUSHQ BP
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MOVQ SP, BP
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CALL libc_sched_yield(SB)
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POPQ BP
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RET
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// Exit the entire program (like C exit)
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