Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 990 insertions, 0 deletions

diff --git a/src/runtime/sys_openbsd_386.s b/src/runtime/sys_openbsd_386.s
new file mode 100644
index 0000000..6005c10
--- /dev/null
+++ b/src/runtime/sys_openbsd_386.s
@@ -0,0 +1,990 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// System calls and other sys.stuff for 386, OpenBSD
+// System calls are implemented in libc/libpthread, this file
+// contains trampolines that convert from Go to C calling convention.
+// Some direct system call implementations currently remain.
+//
+
+#include "go_asm.h"
+#include "go_tls.h"
+#include "textflag.h"
+
+#define	CLOCK_MONOTONIC	$3
+
+TEXT runtime·setldt(SB),NOSPLIT,$0
+	// Nothing to do, pthread already set thread-local storage up.
+	RET
+
+// mstart_stub is the first function executed on a new thread started by pthread_create.
+// 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.
+	MOVL	BX, bx-4(SP)
+	MOVL	BP, bp-8(SP)
+	MOVL	SI, si-12(SP)
+	MOVL	DI, di-16(SP)
+
+	MOVL	32(SP), AX	// m
+	MOVL	m_g0(AX), DX
+	get_tls(CX)
+	MOVL	DX, g(CX)
+
+	CALL	runtime·mstart(SB)
+
+	// Restore callee-save registers.
+	MOVL	di-16(SP), DI
+	MOVL	si-12(SP), SI
+	MOVL	bp-8(SP),  BP
+	MOVL	bx-4(SP),  BX
+
+	// Go is all done with this OS thread.
+	// Tell pthread everything is ok (we never join with this thread, so
+	// the value here doesn't really matter).
+	MOVL	$0, AX
+	RET
+
+TEXT runtime·sigfwd(SB),NOSPLIT,$0-16
+	MOVL	fn+0(FP), AX
+	MOVL	sig+4(FP), BX
+	MOVL	info+8(FP), CX
+	MOVL	ctx+12(FP), DX
+	MOVL	SP, SI
+	SUBL	$32, SP
+	ANDL	$~15, SP	// align stack: handler might be a C function
+	MOVL	BX, 0(SP)
+	MOVL	CX, 4(SP)
+	MOVL	DX, 8(SP)
+	MOVL	SI, 12(SP)	// save SI: handler might be a Go function
+	CALL	AX
+	MOVL	12(SP), AX
+	MOVL	AX, SP
+	RET
+
+// Called by OS using C ABI.
+TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$28
+	NOP	SP	// tell vet SP changed - stop checking offsets
+	// Save callee-saved C registers, since the caller may be a C signal handler.
+	MOVL	BX, bx-4(SP)
+	MOVL	BP, bp-8(SP)
+	MOVL	SI, si-12(SP)
+	MOVL	DI, di-16(SP)
+	// We don't save mxcsr or the x87 control word because sigtrampgo doesn't
+	// modify them.
+
+	MOVL	32(SP), BX // signo
+	MOVL	BX, 0(SP)
+	MOVL	36(SP), BX // info
+	MOVL	BX, 4(SP)
+	MOVL	40(SP), BX // context
+	MOVL	BX, 8(SP)
+	CALL	runtime·sigtrampgo(SB)
+
+	MOVL	di-16(SP), DI
+	MOVL	si-12(SP), SI
+	MOVL	bp-8(SP),  BP
+	MOVL	bx-4(SP),  BX
+	RET
+
+// These trampolines help convert from Go calling convention to C calling convention.
+// They should be called with asmcgocall - note that while asmcgocall does
+// stack alignment, creation of a frame undoes it again.
+// A pointer to the arguments is passed on the stack.
+// A single int32 result is returned in AX.
+// (For more results, make an args/results structure.)
+TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$4, SP
+	MOVL	12(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	AX, 0(SP)		// arg 1 - attr
+	CALL	libc_pthread_attr_init(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·pthread_attr_destroy_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$4, SP
+	MOVL	12(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	AX, 0(SP)		// arg 1 - attr
+	CALL	libc_pthread_attr_destroy(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·pthread_attr_getstacksize_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$8, SP
+	MOVL	16(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	AX, 0(SP)		// arg 1 - attr
+	MOVL	BX, 4(SP)		// arg 2 - size
+	CALL	libc_pthread_attr_getstacksize(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$8, SP
+	MOVL	16(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	AX, 0(SP)		// arg 1 - attr
+	MOVL	BX, 4(SP)		// arg 2 - state
+	CALL	libc_pthread_attr_setdetachstate(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$20, SP
+	MOVL	28(SP), DX		// pointer to args
+	LEAL	16(SP), AX
+	MOVL	AX, 0(SP)		// arg 1 - &threadid (discarded)
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 4(SP)		// arg 2 - attr
+	MOVL	BX, 8(SP)		// arg 3 - start
+	MOVL	CX, 12(SP)		// arg 4 - arg
+	CALL	libc_pthread_create(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·thrkill_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$12, SP
+	MOVL	20(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	AX, 0(SP)		// arg 1 - tid
+	MOVL	BX, 4(SP)		// arg 2 - signal
+	MOVL	$0, 8(SP)		// arg 3 - tcb
+	CALL	libc_thrkill(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·thrsleep_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$20, SP
+	MOVL	28(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - id
+	MOVL	BX, 4(SP)		// arg 2 - clock_id
+	MOVL	CX, 8(SP)		// arg 3 - abstime
+	MOVL	12(DX), AX
+	MOVL	16(DX), BX
+	MOVL	AX, 12(SP)		// arg 4 - lock
+	MOVL	BX, 16(SP)		// arg 5 - abort
+	CALL	libc_thrsleep(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·thrwakeup_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$8, SP
+	MOVL	16(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	AX, 0(SP)		// arg 1 - id
+	MOVL	BX, 4(SP)		// arg 2 - count
+	CALL	libc_thrwakeup(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·exit_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$4, SP
+	MOVL	12(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	AX, 0(SP)		// arg 1 - status
+	CALL	libc_exit(SB)
+	MOVL	$0xf1, 0xf1		// crash on failure
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·getthrid_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	CALL	libc_getthrid(SB)
+	NOP	SP			// tell vet SP changed - stop checking offsets
+	MOVL	8(SP), DX		// pointer to return value
+	MOVL	AX, 0(DX)
+	POPL	BP
+	RET
+
+TEXT runtime·raiseproc_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$8, SP
+	MOVL	16(SP), DX
+	MOVL	0(DX), BX
+	CALL	libc_getpid(SB)
+	MOVL	AX, 0(SP)		// arg 1 - pid
+	MOVL	BX, 4(SP)		// arg 2 - signal
+	CALL	libc_kill(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·sched_yield_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	CALL	libc_sched_yield(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$32, SP
+	MOVL	40(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - addr
+	MOVL	BX, 4(SP)		// arg 2 - len
+	MOVL	CX, 8(SP)		// arg 3 - prot
+	MOVL	12(DX), AX
+	MOVL	16(DX), BX
+	MOVL	20(DX), CX
+	MOVL	AX, 12(SP)		// arg 4 - flags
+	MOVL	BX, 16(SP)		// arg 5 - fid
+	MOVL	$0, 20(SP)		// pad
+	MOVL	CX, 24(SP)		// arg 6 - offset (low 32 bits)
+	MOVL	$0, 28(SP)		// offset (high 32 bits)
+	CALL	libc_mmap(SB)
+	MOVL	$0, BX
+	CMPL	AX, $-1
+	JNE	ok
+	CALL	libc_errno(SB)
+	MOVL	(AX), BX
+	MOVL	$0, AX
+ok:
+	MOVL	40(SP), DX
+	MOVL	AX, 24(DX)
+	MOVL	BX, 28(DX)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$8, SP
+	MOVL	16(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	AX, 0(SP)		// arg 1 - addr
+	MOVL	BX, 4(SP)		// arg 2 - len
+	CALL	libc_munmap(SB)
+	CMPL	AX, $-1
+	JNE	2(PC)
+	MOVL	$0xf1, 0xf1		// crash on failure
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·madvise_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$12, SP
+	MOVL	20(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - addr
+	MOVL	BX, 4(SP)		// arg 2 - len
+	MOVL	CX, 8(SP)		// arg 3 - advice
+	CALL	libc_madvise(SB)
+	// ignore failure - maybe pages are locked
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·open_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$16, SP
+	MOVL	24(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - path
+	MOVL	BX, 4(SP)		// arg 2 - flags
+	MOVL	CX, 8(SP)		// arg 3 - mode
+	MOVL	$0, 12(SP)		// vararg
+	CALL	libc_open(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·close_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$4, SP
+	MOVL	12(SP), DX
+	MOVL	0(DX), AX
+	MOVL	AX, 0(SP)		// arg 1 - fd
+	CALL	libc_close(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·read_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$12, SP
+	MOVL	20(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - fd
+	MOVL	BX, 4(SP)		// arg 2 - buf
+	MOVL	CX, 8(SP)		// arg 3 - count
+	CALL	libc_read(SB)
+	CMPL	AX, $-1
+	JNE	noerr
+	CALL	libc_errno(SB)
+	MOVL	(AX), AX
+	NEGL	AX			// caller expects negative errno
+noerr:
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·write_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$12, SP
+	MOVL	20(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - fd
+	MOVL	BX, 4(SP)		// arg 2 - buf
+	MOVL	CX, 8(SP)		// arg 3 - count
+	CALL	libc_write(SB)
+	CMPL	AX, $-1
+	JNE	noerr
+	CALL	libc_errno(SB)
+	MOVL	(AX), AX
+	NEGL	AX			// caller expects negative errno
+noerr:
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·pipe2_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$8, SP
+	MOVL	16(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	AX, 0(SP)		// arg 1 - fds
+	MOVL	BX, 4(SP)		// arg 2 - flags
+	CALL	libc_pipe2(SB)
+	CMPL	AX, $-1
+	JNE	noerr
+	CALL	libc_errno(SB)
+	MOVL	(AX), AX
+	NEGL	AX			// caller expects negative errno
+noerr:
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$12, SP
+	MOVL	20(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - which
+	MOVL	BX, 4(SP)		// arg 2 - new
+	MOVL	CX, 8(SP)		// arg 3 - old
+	CALL	libc_setitimer(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$4, SP
+	MOVL	12(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	AX, 0(SP)
+	CALL	libc_usleep(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$24, SP
+	MOVL	32(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - name
+	MOVL	BX, 4(SP)		// arg 2 - namelen
+	MOVL	CX, 8(SP)		// arg 3 - old
+	MOVL	12(DX), AX
+	MOVL	16(DX), BX
+	MOVL	20(DX), CX
+	MOVL	AX, 12(SP)		// arg 4 - oldlenp
+	MOVL	BX, 16(SP)		// arg 5 - newp
+	MOVL	CX, 20(SP)		// arg 6 - newlen
+	CALL	libc_sysctl(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	CALL	libc_kqueue(SB)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$24, SP
+	MOVL	32(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - kq
+	MOVL	BX, 4(SP)		// arg 2 - keventt
+	MOVL	CX, 8(SP)		// arg 3 - nch
+	MOVL	12(DX), AX
+	MOVL	16(DX), BX
+	MOVL	20(DX), CX
+	MOVL	AX, 12(SP)		// arg 4 - ev
+	MOVL	BX, 16(SP)		// arg 5 - nev
+	MOVL	CX, 20(SP)		// arg 6 - ts
+	CALL	libc_kevent(SB)
+	CMPL	AX, $-1
+	JNE	noerr
+	CALL	libc_errno(SB)
+	MOVL	(AX), AX
+	NEGL	AX			// caller expects negative errno
+noerr:
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·clock_gettime_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$8, SP
+	MOVL	16(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	AX, 0(SP)		// arg 1 - tp
+	MOVL	BX, 4(SP)		// arg 2 - clock_id
+	CALL	libc_clock_gettime(SB)
+	CMPL	AX, $-1
+	JNE	noerr
+	CALL	libc_errno(SB)
+	MOVL	(AX), AX
+	NEGL	AX			// caller expects negative errno
+noerr:
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$16, SP
+	MOVL	24(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - fd
+	MOVL	BX, 4(SP)		// arg 2 - cmd
+	MOVL	CX, 8(SP)		// arg 3 - arg
+	MOVL	$0, 12(SP)		// vararg
+	CALL	libc_fcntl(SB)
+	MOVL	$0, BX
+	CMPL	AX, $-1
+	JNE	noerr
+	CALL	libc_errno(SB)
+	MOVL	(AX), BX
+	MOVL	$-1, AX
+noerr:
+	MOVL	24(SP), DX		// pointer to args
+	MOVL	AX, 12(DX)
+	MOVL	BX, 16(DX)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$12, SP
+	MOVL	20(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - sig
+	MOVL	BX, 4(SP)		// arg 2 - new
+	MOVL	CX, 8(SP)		// arg 3 - old
+	CALL	libc_sigaction(SB)
+	CMPL	AX, $-1
+	JNE	2(PC)
+	MOVL	$0xf1, 0xf1		// crash on failure
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$12, SP
+	MOVL	20(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	8(DX), CX
+	MOVL	AX, 0(SP)		// arg 1 - how
+	MOVL	BX, 4(SP)		// arg 2 - new
+	MOVL	CX, 8(SP)		// arg 3 - old
+	CALL	libc_pthread_sigmask(SB)
+	CMPL	AX, $-1
+	JNE	2(PC)
+	MOVL	$0xf1, 0xf1		// crash on failure
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+	SUBL	$8, SP
+	MOVL	16(SP), DX		// pointer to args
+	MOVL	0(DX), AX
+	MOVL	4(DX), BX
+	MOVL	AX, 0(SP)		// arg 1 - new
+	MOVL	BX, 4(SP)		// arg 2 - old
+	CALL	libc_sigaltstack(SB)
+	CMPL	AX, $-1
+	JNE	2(PC)
+	MOVL	$0xf1, 0xf1		// crash on failure
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+// syscall calls a function in libc on behalf of the syscall package.
+// syscall takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscall must be called on the g0 stack with the
+// C calling convention (use libcCall).
+//
+// syscall expects a 32-bit result and tests for 32-bit -1
+// to decide there was an error.
+TEXT runtime·syscall(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+
+	SUBL	$12, SP
+	MOVL	20(SP), BX		// pointer to args
+
+	MOVL	(1*4)(BX), AX
+	MOVL	(2*4)(BX), CX
+	MOVL	(3*4)(BX), DX
+	MOVL	AX, (0*4)(SP)		// a1
+	MOVL	CX, (1*4)(SP)		// a2
+	MOVL	DX, (2*4)(SP)		// a3
+
+	MOVL	(0*4)(BX), AX		// fn
+	CALL	AX
+
+	MOVL	AX, (4*4)(BX)		// r1
+	MOVL	DX, (5*4)(BX)		// r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMPL	AX, $-1
+	JNE	ok
+
+	// Get error code from libc.
+	CALL	libc_errno(SB)
+	MOVL	(AX), AX
+	MOVW	AX, (6*4)(BX)		// err
+
+ok:
+	MOVL	$0, AX			// no error (it's ignored anyway)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+// syscallX calls a function in libc on behalf of the syscall package.
+// syscallX takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscallX must be called on the g0 stack with the
+// C calling convention (use libcCall).
+//
+// syscallX is like syscall but expects a 64-bit result
+// and tests for 64-bit -1 to decide there was an error.
+TEXT runtime·syscallX(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+
+	SUBL	$12, SP
+	MOVL	20(SP), BX		// pointer to args
+
+	MOVL	(1*4)(BX), AX
+	MOVL	(2*4)(BX), CX
+	MOVL	(3*4)(BX), DX
+	MOVL	AX, (0*4)(SP)		// a1
+	MOVL	CX, (1*4)(SP)		// a2
+	MOVL	DX, (2*4)(SP)		// a3
+
+	MOVL	(0*4)(BX), AX		// fn
+	CALL	AX
+
+	MOVL	AX, (4*4)(BX)		// r1
+	MOVL	DX, (5*4)(BX)		// r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMPL	AX, $-1
+	JNE	ok
+	CMPL	DX, $-1
+	JNE	ok
+
+	// Get error code from libc.
+	CALL	libc_errno(SB)
+	MOVL	(AX), AX
+	MOVW	AX, (6*4)(BX)		// err
+
+ok:
+	MOVL	$0, AX			// no error (it's ignored anyway)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+// syscall6 calls a function in libc on behalf of the syscall package.
+// syscall6 takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	a4    uintptr
+//	a5    uintptr
+//	a6    uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscall6 must be called on the g0 stack with the
+// C calling convention (use libcCall).
+//
+// syscall6 expects a 32-bit result and tests for 32-bit -1
+// to decide there was an error.
+TEXT runtime·syscall6(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+
+	SUBL	$24, SP
+	MOVL	32(SP), BX		// pointer to args
+
+	MOVL	(1*4)(BX), AX
+	MOVL	(2*4)(BX), CX
+	MOVL	(3*4)(BX), DX
+	MOVL	AX, (0*4)(SP)		// a1
+	MOVL	CX, (1*4)(SP)		// a2
+	MOVL	DX, (2*4)(SP)		// a3
+	MOVL	(4*4)(BX), AX
+	MOVL	(5*4)(BX), CX
+	MOVL	(6*4)(BX), DX
+	MOVL	AX, (3*4)(SP)		// a4
+	MOVL	CX, (4*4)(SP)		// a5
+	MOVL	DX, (5*4)(SP)		// a6
+
+	MOVL	(0*4)(BX), AX		// fn
+	CALL	AX
+
+	MOVL	AX, (7*4)(BX)		// r1
+	MOVL	DX, (8*4)(BX)		// r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMPL	AX, $-1
+	JNE	ok
+
+	// Get error code from libc.
+	CALL	libc_errno(SB)
+	MOVL	(AX), AX
+	MOVW	AX, (9*4)(BX)		// err
+
+ok:
+	MOVL	$0, AX			// no error (it's ignored anyway)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+// syscall6X calls a function in libc on behalf of the syscall package.
+// syscall6X takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	a4    uintptr
+//	a5    uintptr
+//	a6    uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscall6X must be called on the g0 stack with the
+// C calling convention (use libcCall).
+//
+// syscall6X is like syscall6 but expects a 64-bit result
+// and tests for 64-bit -1 to decide there was an error.
+TEXT runtime·syscall6X(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+
+	SUBL	$24, SP
+	MOVL	32(SP), BX		// pointer to args
+
+	MOVL	(1*4)(BX), AX
+	MOVL	(2*4)(BX), CX
+	MOVL	(3*4)(BX), DX
+	MOVL	AX, (0*4)(SP)		// a1
+	MOVL	CX, (1*4)(SP)		// a2
+	MOVL	DX, (2*4)(SP)		// a3
+	MOVL	(4*4)(BX), AX
+	MOVL	(5*4)(BX), CX
+	MOVL	(6*4)(BX), DX
+	MOVL	AX, (3*4)(SP)		// a4
+	MOVL	CX, (4*4)(SP)		// a5
+	MOVL	DX, (5*4)(SP)		// a6
+
+	MOVL	(0*4)(BX), AX		// fn
+	CALL	AX
+
+	MOVL	AX, (7*4)(BX)		// r1
+	MOVL	DX, (8*4)(BX)		// r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMPL	AX, $-1
+	JNE	ok
+	CMPL	DX, $-1
+	JNE	ok
+
+	// Get error code from libc.
+	CALL	libc_errno(SB)
+	MOVL	(AX), AX
+	MOVW	AX, (9*4)(BX)		// err
+
+ok:
+	MOVL	$0, AX			// no error (it's ignored anyway)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+// syscall10 calls a function in libc on behalf of the syscall package.
+// syscall10 takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	a4    uintptr
+//	a5    uintptr
+//	a6    uintptr
+//	a7    uintptr
+//	a8    uintptr
+//	a9    uintptr
+//	a10   uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscall10 must be called on the g0 stack with the
+// C calling convention (use libcCall).
+TEXT runtime·syscall10(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+
+	SUBL	$40, SP
+	MOVL	48(SP), BX		// pointer to args
+
+	MOVL	(1*4)(BX), AX
+	MOVL	(2*4)(BX), CX
+	MOVL	(3*4)(BX), DX
+	MOVL	AX, (0*4)(SP)		// a1
+	MOVL	CX, (1*4)(SP)		// a2
+	MOVL	DX, (2*4)(SP)		// a3
+	MOVL	(4*4)(BX), AX
+	MOVL	(5*4)(BX), CX
+	MOVL	(6*4)(BX), DX
+	MOVL	AX, (3*4)(SP)		// a4
+	MOVL	CX, (4*4)(SP)		// a5
+	MOVL	DX, (5*4)(SP)		// a6
+	MOVL	(7*4)(BX), AX
+	MOVL	(8*4)(BX), CX
+	MOVL	(9*4)(BX), DX
+	MOVL	AX, (6*4)(SP)		// a7
+	MOVL	CX, (7*4)(SP)		// a8
+	MOVL	DX, (8*4)(SP)		// a9
+	MOVL	(10*4)(BX), AX
+	MOVL	AX, (9*4)(SP)		// a10
+
+	MOVL	(0*4)(BX), AX		// fn
+	CALL	AX
+
+	MOVL	AX, (11*4)(BX)		// r1
+	MOVL	DX, (12*4)(BX)		// r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMPL	AX, $-1
+	JNE	ok
+
+	// Get error code from libc.
+	CALL	libc_errno(SB)
+	MOVL	(AX), AX
+	MOVW	AX, (13*4)(BX)		// err
+
+ok:
+	MOVL	$0, AX			// no error (it's ignored anyway)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+// syscall10X calls a function in libc on behalf of the syscall package.
+// syscall10X takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	a4    uintptr
+//	a5    uintptr
+//	a6    uintptr
+//	a7    uintptr
+//	a8    uintptr
+//	a9    uintptr
+//	a10   uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscall10X must be called on the g0 stack with the
+// C calling convention (use libcCall).
+//
+// syscall10X is like syscall9 but expects a 64-bit result
+// and tests for 64-bit -1 to decide there was an error.
+TEXT runtime·syscall10X(SB),NOSPLIT,$0
+	PUSHL	BP
+	MOVL	SP, BP
+
+	SUBL	$40, SP
+	MOVL	48(SP), BX		// pointer to args
+
+	MOVL	(1*4)(BX), AX
+	MOVL	(2*4)(BX), CX
+	MOVL	(3*4)(BX), DX
+	MOVL	AX, (0*4)(SP)		// a1
+	MOVL	CX, (1*4)(SP)		// a2
+	MOVL	DX, (2*4)(SP)		// a3
+	MOVL	(4*4)(BX), AX
+	MOVL	(5*4)(BX), CX
+	MOVL	(6*4)(BX), DX
+	MOVL	AX, (3*4)(SP)		// a4
+	MOVL	CX, (4*4)(SP)		// a5
+	MOVL	DX, (5*4)(SP)		// a6
+	MOVL	(7*4)(BX), AX
+	MOVL	(8*4)(BX), CX
+	MOVL	(9*4)(BX), DX
+	MOVL	AX, (6*4)(SP)		// a7
+	MOVL	CX, (7*4)(SP)		// a8
+	MOVL	DX, (8*4)(SP)		// a9
+	MOVL	(10*4)(BX), AX
+	MOVL	AX, (9*4)(SP)		// a10
+
+	MOVL	(0*4)(BX), AX		// fn
+	CALL	AX
+
+	MOVL	AX, (11*4)(BX)		// r1
+	MOVL	DX, (12*4)(BX)		// r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMPL	AX, $-1
+	JNE	ok
+	CMPL	DX, $-1
+	JNE	ok
+
+	// Get error code from libc.
+	CALL	libc_errno(SB)
+	MOVL	(AX), AX
+	MOVW	AX, (13*4)(BX)		// err
+
+ok:
+	MOVL	$0, AX			// no error (it's ignored anyway)
+	MOVL	BP, SP
+	POPL	BP
+	RET
+
+TEXT runtime·issetugid_trampoline(SB),NOSPLIT,$0
+	PUSHL	BP
+	CALL	libc_issetugid(SB)
+	NOP	SP			// tell vet SP changed - stop checking offsets
+	MOVL	8(SP), DX		// pointer to return value
+	MOVL	AX, 0(DX)
+	POPL	BP
+	RET