Imported Upstream version 1.4upstream/1.4

1 files changed, 127 insertions, 0 deletions

diff --git a/src/syscall/asm_linux_amd64.s b/src/syscall/asm_linux_amd64.s
new file mode 100644
index 000000000..b3ce2165d
--- /dev/null
+++ b/src/syscall/asm_linux_amd64.s
@@ -0,0 +1,127 @@
+// 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.
+
+// TODO(rsc): Rewrite all nn(SP) references into name+(nn-8)(FP)
+// so that go vet can check that they are correct.
+
+#include "textflag.h"
+#include "funcdata.h"
+
+//
+// System calls for AMD64, Linux
+//
+
+// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64);
+// Trap # in AX, args in DI SI DX R10 R8 R9, return in AX DX
+// Note that this differs from "standard" ABI convention, which
+// would pass 4th arg in CX, not R10.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	CALL	runtime·entersyscall(SB)
+	MOVQ	16(SP), DI
+	MOVQ	24(SP), SI
+	MOVQ	32(SP), DX
+	MOVQ	$0, R10
+	MOVQ	$0, R8
+	MOVQ	$0, R9
+	MOVQ	8(SP), AX	// syscall entry
+	SYSCALL
+	CMPQ	AX, $0xfffffffffffff001
+	JLS	ok
+	MOVQ	$-1, 40(SP)	// r1
+	MOVQ	$0, 48(SP)	// r2
+	NEGQ	AX
+	MOVQ	AX, 56(SP)  // errno
+	CALL	runtime·exitsyscall(SB)
+	RET
+ok:
+	MOVQ	AX, 40(SP)	// r1
+	MOVQ	DX, 48(SP)	// r2
+	MOVQ	$0, 56(SP)	// errno
+	CALL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·Syscall6(SB),NOSPLIT,$0-80
+	CALL	runtime·entersyscall(SB)
+	MOVQ	16(SP), DI
+	MOVQ	24(SP), SI
+	MOVQ	32(SP), DX
+	MOVQ	40(SP), R10
+	MOVQ	48(SP), R8
+	MOVQ	56(SP), R9
+	MOVQ	8(SP), AX	// syscall entry
+	SYSCALL
+	CMPQ	AX, $0xfffffffffffff001
+	JLS	ok6
+	MOVQ	$-1, 64(SP)	// r1
+	MOVQ	$0, 72(SP)	// r2
+	NEGQ	AX
+	MOVQ	AX, 80(SP)  // errno
+	CALL	runtime·exitsyscall(SB)
+	RET
+ok6:
+	MOVQ	AX, 64(SP)	// r1
+	MOVQ	DX, 72(SP)	// r2
+	MOVQ	$0, 80(SP)	// errno
+	CALL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	MOVQ	16(SP), DI
+	MOVQ	24(SP), SI
+	MOVQ	32(SP), DX
+	MOVQ	$0, R10
+	MOVQ	$0, R8
+	MOVQ	$0, R9
+	MOVQ	8(SP), AX	// syscall entry
+	SYSCALL
+	CMPQ	AX, $0xfffffffffffff001
+	JLS	ok1
+	MOVQ	$-1, 40(SP)	// r1
+	MOVQ	$0, 48(SP)	// r2
+	NEGQ	AX
+	MOVQ	AX, 56(SP)  // errno
+	RET
+ok1:
+	MOVQ	AX, 40(SP)	// r1
+	MOVQ	DX, 48(SP)	// r2
+	MOVQ	$0, 56(SP)	// errno
+	RET
+
+TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
+	MOVQ	16(SP), DI
+	MOVQ	24(SP), SI
+	MOVQ	32(SP), DX
+	MOVQ	40(SP), R10
+	MOVQ	48(SP), R8
+	MOVQ	56(SP), R9
+	MOVQ	8(SP), AX	// syscall entry
+	SYSCALL
+	CMPQ	AX, $0xfffffffffffff001
+	JLS	ok2
+	MOVQ	$-1, 64(SP)	// r1
+	MOVQ	$0, 72(SP)	// r2
+	NEGQ	AX
+	MOVQ	AX, 80(SP)  // errno
+	RET
+ok2:
+	MOVQ	AX, 64(SP)	// r1
+	MOVQ	DX, 72(SP)	// r2
+	MOVQ	$0, 80(SP)	// errno
+	RET
+
+TEXT ·gettimeofday(SB),NOSPLIT,$0-16
+	MOVQ	8(SP), DI
+	MOVQ	$0, SI
+	MOVQ	runtime·__vdso_gettimeofday_sym(SB), AX
+	CALL	AX
+
+	CMPQ	AX, $0xfffffffffffff001
+	JLS	ok7
+	NEGQ	AX
+	MOVQ	AX, 16(SP)  // errno
+	RET
+ok7:
+	MOVQ	$0, 16(SP)  // errno
+	RET