runtime: remove pthread_kill/pthread_self for openbsd

We're now using getthrid() and thrkill() instead.

Updates #36435

Change-Id: I1c6bcfb9b46d149e0a2a10e936a244576489a88e
Reviewed-on: https://go-review.googlesource.com/c/go/+/285692
Trust: Joel Sing <joel@sing.id.au>
Run-TryBot: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

Author: 4a6f656c

src/runtime/sys_openbsd.go

@@ -46,21 +46,6 @@ func pthread_create(attr *pthreadattr, start uintptr, arg unsafe.Pointer) int32
 }
 func pthread_create_trampoline()
 
-//go:nosplit
-//go:cgo_unsafe_args
-func pthread_self() (t pthread) {
-	libcCall(unsafe.Pointer(funcPC(pthread_self_trampoline)), unsafe.Pointer(&t))
-	return
-}
-func pthread_self_trampoline()
-
-//go:nosplit
-//go:cgo_unsafe_args
-func pthread_kill(t pthread, sig uint32) {
-	libcCall(unsafe.Pointer(funcPC(pthread_kill_trampoline)), unsafe.Pointer(&t))
-}
-func pthread_kill_trampoline()
-
 // Tell the linker that the libc_* functions are to be found
 // in a system library, with the libc_ prefix missing.
 
@@ -70,8 +55,5 @@ func pthread_kill_trampoline()
 //go:cgo_import_dynamic libc_pthread_attr_setdetachstate pthread_attr_setdetachstate "libpthread.so"
 //go:cgo_import_dynamic libc_pthread_create pthread_create "libpthread.so"
 //go:cgo_import_dynamic libc_pthread_sigmask pthread_sigmask "libpthread.so"
-//go:cgo_import_dynamic libc_pthread_self pthread_self "libpthread.so"
-//go:cgo_import_dynamic libc_pthread_kill pthread_kill "libpthread.so"
 
 //go:cgo_import_dynamic _ _ "libpthread.so"
-//go:cgo_import_dynamic _ _ "libc.so"

src/runtime/sys_openbsd_amd64.s

@@ -150,24 +150,6 @@ TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0
 	POPQ	BP
 	RET
 
-TEXT runtime·pthread_self_trampoline(SB),NOSPLIT,$0
-	PUSHQ	BP
-	MOVQ	SP, BP
-	MOVQ	DI, BX			// BX is caller-save
-	CALL	libc_pthread_self(SB)
-	MOVQ	AX, 0(BX)		// return value
-	POPQ	BP
-	RET
-
-TEXT runtime·pthread_kill_trampoline(SB),NOSPLIT,$0
-	PUSHQ	BP
-	MOVQ	SP, BP
-	MOVQ	8(DI), SI		// arg 2 - sig
-	MOVQ	0(DI), DI		// arg 1 - thread
-	CALL	libc_pthread_kill(SB)
-	POPQ	BP
-	RET
-
 TEXT runtime·thrsleep_trampoline(SB),NOSPLIT,$0
 	PUSHQ	BP
 	MOVQ	SP, BP

src/runtime/sys_openbsd_arm64.s

@@ -188,18 +188,6 @@ TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0
 	ADD	$16, RSP
 	RET
 
-TEXT runtime·pthread_self_trampoline(SB),NOSPLIT,$0
-	MOVD	R0, R19			// pointer to args
-	CALL	libc_pthread_self(SB)
-	MOVD	R0, 0(R19)		// return value
-	RET
-
-TEXT runtime·pthread_kill_trampoline(SB),NOSPLIT,$0
-	MOVW	8(R0), R1		// arg 2 - sig
-	MOVD	0(R0), R0		// arg 1 - thread
-	CALL	libc_pthread_kill(SB)
-	RET
-
 // Exit the entire program (like C exit)
 TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
 	MOVW	code+0(FP), R0		// arg 1 - status