beginnings of a low-level syscall library

R=ken
OCL=13483
CL=13496

1 files changed, 123 insertions, 0 deletions

diff --git a/src/syscall/syscall_amd64_linux.s b/src/syscall/syscall_amd64_linux.s
new file mode 100644
index 0000000000..9690a96362
--- /dev/null
+++ b/src/syscall/syscall_amd64_linux.s
@@ -0,0 +1,123 @@
+// 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 for AMD64, Linux
+//
+
+//TEXT	sys·exit(SB),1,$0-8
+//	MOVL	8(SP), DI
+//	MOVL	$60, AX
+//	SYSCALL
+//	RET
+
+TEXT	syscall·open(SB),1,$0-16
+	MOVQ	8(SP), DI
+	MOVQ	16(SP), SI
+	MOVQ	$0, DX
+	MOVQ	$2, AX			// syscall entry
+	SYSCALL
+	CMPQ	AX, $0xfffffffffffff001
+	JLS	5(PC)
+	MOVQ	$-1, 24(SP)
+	NEGQ	AX
+	MOVQ	AX, 32(SP)
+	RET
+	MOVQ	AX, 24(SP)
+	MOVQ	$0, 32(SP)
+	RET
+
+TEXT	syscall·close(SB),1,$0-16
+	MOVQ	8(SP), DI
+	MOVL	$3, AX			// syscall entry
+	SYSCALL
+	CMPQ	AX, $0xfffffffffffff001
+	JLS	5(PC)
+	MOVQ	$-1, 16(SP)
+	NEGQ	AX
+	MOVQ	AX, 24(SP)
+	RET
+	MOVQ	AX, 16(SP)
+	MOVQ	$0, 24(SP)
+	RET
+
+//TEXT	fstat(SB),1,$0-16
+//	MOVL	8(SP), DI
+//	MOVQ	16(SP), SI
+//	MOVL	$5, AX			// syscall entry
+//	SYSCALL
+//	RET
+
+TEXT	syscall·read(SB),1,$0-16
+	MOVL	8(SP), DI
+	MOVQ	16(SP), SI
+	MOVL	24(SP), DX
+	MOVL	$0, AX			// syscall entry
+	SYSCALL
+	CMPQ	AX, $0xfffffffffffff001
+	JLS	5(PC)
+	MOVQ	$-1, 32(SP)
+	NEGQ	AX
+	MOVQ	AX, 40(SP)
+	RET
+	MOVQ	AX, 32(SP)
+	MOVQ	$0, 40(SP)
+	RET
+
+TEXT	syscall·write(SB),1,$0-16
+	MOVL	8(SP), DI
+	MOVQ	16(SP), SI
+	MOVL	24(SP), DX
+	MOVL	$1, AX			// syscall entry
+	SYSCALL
+	CMPQ	AX, $0xfffffffffffff001
+	JLS	5(PC)
+	MOVQ	$-1, 32(SP)
+	NEGQ	AX
+	MOVQ	AX, 40(SP)
+	RET
+	MOVQ	AX, 32(SP)
+	MOVQ	$0, 40(SP)
+	RET
+
+//TEXT	sys·rt_sigaction(SB),1,$0-32
+//	MOVL	8(SP), DI
+//	MOVQ	16(SP), SI
+//	MOVQ	24(SP), DX
+//	MOVQ	32(SP), CX
+//	MOVL	CX, R10
+//	MOVL	$13, AX			// syscall entry
+//	SYSCALL
+//	RET
+//
+//TEXT	sigtramp(SB),1,$24-16
+//	MOVQ	DI,0(SP)
+//	MOVQ	SI,8(SP)
+//	MOVQ	DX,16(SP)
+//	CALL	sighandler(SB)
+//	RET
+//
+//TEXT	sys·mmap(SB),1,$0-32
+//	MOVQ	8(SP), DI
+//	MOVL	16(SP), SI
+//	MOVL	20(SP), DX
+//	MOVL	24(SP), CX
+//	MOVL	28(SP), R8
+//	MOVL	32(SP), R9
+//
+///* flags arg for ANON is 1000 but sb 20 */
+//	MOVL	CX, AX
+//	ANDL	$~0x1000, CX
+//	ANDL	$0x1000, AX
+//	SHRL	$7, AX
+//	ORL	AX, CX
+//
+//	MOVL	CX, R10
+//	MOVL	$9, AX			// syscall entry
+//	SYSCALL
+//	CMPQ	AX, $0xfffffffffffff001
+//	JLS	2(PC)
+//	CALL	notok(SB)
+//	RET
+//