1 files changed, 257 insertions, 0 deletions
diff --git a/src/runtime/sys_plan9_amd64.s b/src/runtime/sys_plan9_amd64.s
new file mode 100644
index 0000000..a53f920
--- /dev/null
+++ b/src/runtime/sys_plan9_amd64.s
@@ -0,0 +1,257 @@
+// Copyright 2010 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.
+
+#include "go_asm.h"
+#include "go_tls.h"
+#include "textflag.h"
+
+TEXT runtime·open(SB),NOSPLIT,$0
+	MOVQ	$14, BP
+	SYSCALL
+	MOVL	AX, ret+16(FP)
+	RET
+
+TEXT runtime·pread(SB),NOSPLIT,$0
+	MOVQ	$50, BP
+	SYSCALL
+	MOVL	AX, ret+32(FP)
+	RET
+
+TEXT runtime·pwrite(SB),NOSPLIT,$0
+	MOVQ	$51, BP
+	SYSCALL
+	MOVL	AX, ret+32(FP)
+	RET
+
+// int32 _seek(int64*, int32, int64, int32)
+TEXT _seek<>(SB),NOSPLIT,$0
+	MOVQ	$39, BP
+	SYSCALL
+	RET
+
+// int64 seek(int32, int64, int32)
+// Convenience wrapper around _seek, the actual system call.
+TEXT runtime·seek(SB),NOSPLIT,$32
+	LEAQ	ret+24(FP), AX
+	MOVL	fd+0(FP), BX
+	MOVQ	offset+8(FP), CX
+	MOVL	whence+16(FP), DX
+	MOVQ	AX, 0(SP)
+	MOVL	BX, 8(SP)
+	MOVQ	CX, 16(SP)
+	MOVL	DX, 24(SP)
+	CALL	_seek<>(SB)
+	CMPL	AX, $0
+	JGE	2(PC)
+	MOVQ	$-1, ret+24(FP)
+	RET
+
+TEXT runtime·closefd(SB),NOSPLIT,$0
+	MOVQ	$4, BP
+	SYSCALL
+	MOVL	AX, ret+8(FP)
+	RET
+
+TEXT runtime·exits(SB),NOSPLIT,$0
+	MOVQ	$8, BP
+	SYSCALL
+	RET
+
+TEXT runtime·brk_(SB),NOSPLIT,$0
+	MOVQ	$24, BP
+	SYSCALL
+	MOVL	AX, ret+8(FP)
+	RET
+
+TEXT runtime·sleep(SB),NOSPLIT,$0
+	MOVQ	$17, BP
+	SYSCALL
+	MOVL	AX, ret+8(FP)
+	RET
+
+TEXT runtime·plan9_semacquire(SB),NOSPLIT,$0
+	MOVQ	$37, BP
+	SYSCALL
+	MOVL	AX, ret+16(FP)
+	RET
+
+TEXT runtime·plan9_tsemacquire(SB),NOSPLIT,$0
+	MOVQ	$52, BP
+	SYSCALL
+	MOVL	AX, ret+16(FP)
+	RET
+
+TEXT runtime·nsec(SB),NOSPLIT,$0
+	MOVQ	$53, BP
+	SYSCALL
+	MOVQ	AX, ret+8(FP)
+	RET
+
+// func walltime() (sec int64, nsec int32)
+TEXT runtime·walltime(SB),NOSPLIT,$8-12
+	CALL	runtime·nanotime1(SB)
+	MOVQ	0(SP), AX
+
+	// generated code for
+	//	func f(x uint64) (uint64, uint64) { return x/1000000000, x%1000000000 }
+	// adapted to reduce duplication
+	MOVQ	AX, CX
+	MOVQ	$1360296554856532783, AX
+	MULQ	CX
+	ADDQ	CX, DX
+	RCRQ	$1, DX
+	SHRQ	$29, DX
+	MOVQ	DX, sec+0(FP)
+	IMULQ	$1000000000, DX
+	SUBQ	DX, CX
+	MOVL	CX, nsec+8(FP)
+	RET
+
+TEXT runtime·notify(SB),NOSPLIT,$0
+	MOVQ	$28, BP
+	SYSCALL
+	MOVL	AX, ret+8(FP)
+	RET
+
+TEXT runtime·noted(SB),NOSPLIT,$0
+	MOVQ	$29, BP
+	SYSCALL
+	MOVL	AX, ret+8(FP)
+	RET
+
+TEXT runtime·plan9_semrelease(SB),NOSPLIT,$0
+	MOVQ	$38, BP
+	SYSCALL
+	MOVL	AX, ret+16(FP)
+	RET
+
+TEXT runtime·rfork(SB),NOSPLIT,$0
+	MOVQ	$19, BP
+	SYSCALL
+	MOVL	AX, ret+8(FP)
+	RET
+
+TEXT runtime·tstart_plan9(SB),NOSPLIT,$8
+	MOVQ	newm+0(FP), CX
+	MOVQ	m_g0(CX), DX
+
+	// Layout new m scheduler stack on os stack.
+	MOVQ	SP, AX
+	MOVQ	AX, (g_stack+stack_hi)(DX)
+	SUBQ	$(64*1024), AX		// stack size
+	MOVQ	AX, (g_stack+stack_lo)(DX)
+	MOVQ	AX, g_stackguard0(DX)
+	MOVQ	AX, g_stackguard1(DX)
+
+	// Initialize procid from TOS struct.
+	MOVQ	_tos(SB), AX
+	MOVL	64(AX), AX
+	MOVQ	AX, m_procid(CX)	// save pid as m->procid
+
+	// Finally, initialize g.
+	get_tls(BX)
+	MOVQ	DX, g(BX)
+
+	CALL	runtime·stackcheck(SB)	// smashes AX, CX
+	CALL	runtime·mstart(SB)
+
+	// Exit the thread.
+	MOVQ	$0, 0(SP)
+	CALL	runtime·exits(SB)
+	JMP	0(PC)
+
+// This is needed by asm_amd64.s
+TEXT runtime·settls(SB),NOSPLIT,$0
+	RET
+
+// void sigtramp(void *ureg, int8 *note)
+TEXT runtime·sigtramp(SB),NOSPLIT|NOFRAME,$0
+	get_tls(AX)
+
+	// check that g exists
+	MOVQ	g(AX), BX
+	CMPQ	BX, $0
+	JNE	3(PC)
+	CALL	runtime·badsignal2(SB) // will exit
+	RET
+
+	// save args
+	MOVQ	ureg+0(FP), CX
+	MOVQ	note+8(FP), DX
+
+	// change stack
+	MOVQ	g_m(BX), BX
+	MOVQ	m_gsignal(BX), R10
+	MOVQ	(g_stack+stack_hi)(R10), BP
+	MOVQ	BP, SP
+
+	// make room for args and g
+	SUBQ	$128, SP
+
+	// save g
+	MOVQ	g(AX), BP
+	MOVQ	BP, 32(SP)
+
+	// g = m->gsignal
+	MOVQ	R10, g(AX)
+
+	// load args and call sighandler
+	MOVQ	CX, 0(SP)
+	MOVQ	DX, 8(SP)
+	MOVQ	BP, 16(SP)
+
+	CALL	runtime·sighandler(SB)
+	MOVL	24(SP), AX
+
+	// restore g
+	get_tls(BX)
+	MOVQ	32(SP), R10
+	MOVQ	R10, g(BX)
+
+	// call noted(AX)
+	MOVQ	AX, 0(SP)
+	CALL	runtime·noted(SB)
+	RET
+
+TEXT runtime·setfpmasks(SB),NOSPLIT,$8
+	STMXCSR	0(SP)
+	MOVL	0(SP), AX
+	ANDL	$~0x3F, AX
+	ORL	$(0x3F<<7), AX
+	MOVL	AX, 0(SP)
+	LDMXCSR	0(SP)
+	RET
+
+#define ERRMAX 128	/* from os_plan9.h */
+
+// void errstr(int8 *buf, int32 len)
+TEXT errstr<>(SB),NOSPLIT,$0
+	MOVQ    $41, BP
+	SYSCALL
+	RET
+
+// func errstr() string
+// Only used by package syscall.
+// Grab error string due to a syscall made
+// in entersyscall mode, without going
+// through the allocator (issue 4994).
+// See ../syscall/asm_plan9_amd64.s:/·Syscall/
+TEXT runtime·errstr(SB),NOSPLIT,$16-16
+	get_tls(AX)
+	MOVQ	g(AX), BX
+	MOVQ	g_m(BX), BX
+	MOVQ	(m_mOS+mOS_errstr)(BX), CX
+	MOVQ	CX, 0(SP)
+	MOVQ	$ERRMAX, 8(SP)
+	CALL	errstr<>(SB)
+	CALL	runtime·findnull(SB)
+	MOVQ	8(SP), AX
+	MOVQ	AX, ret_len+8(FP)
+	MOVQ	0(SP), AX
+	MOVQ	AX, ret_base+0(FP)
+	RET
+
+// never called on this platform
+TEXT ·sigpanictramp(SB),NOSPLIT,$0-0
+	UNDEF