diff options
Diffstat (limited to 'src/syscall/asm9_unix2_amd64.s')
-rw-r--r-- | src/syscall/asm9_unix2_amd64.s | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/syscall/asm9_unix2_amd64.s b/src/syscall/asm9_unix2_amd64.s new file mode 100644 index 0000000..5bf53a1 --- /dev/null +++ b/src/syscall/asm9_unix2_amd64.s @@ -0,0 +1,48 @@ +// Copyright 2016 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. + +//go:build dragonfly || freebsd + +#include "textflag.h" +#include "funcdata.h" + +// +// Syscall9 support for AMD64, DragonFly and FreeBSD +// + +// func Syscall9(trap int64, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int64); +TEXT ·Syscall9(SB),NOSPLIT,$0-104 + CALL runtime·entersyscall<ABIInternal>(SB) + MOVQ num+0(FP), AX // syscall entry + MOVQ a1+8(FP), DI + MOVQ a2+16(FP), SI + MOVQ a3+24(FP), DX + MOVQ a4+32(FP), R10 + MOVQ a5+40(FP), R8 + MOVQ a6+48(FP), R9 + + // shift around the last three arguments so they're at the + // top of the stack when the syscall is called. + // note that we are scribbling over the Go arguments now. + MOVQ SP, CX // hide (SP) writes from vet + MOVQ a7+56(FP), R11 // arg 7 + MOVQ R11, 8(CX) + MOVQ a8+64(FP), R11 // arg 8 + MOVQ R11, 16(CX) + MOVQ a9+72(FP), R11 // arg 9 + MOVQ R11, 24(CX) + + SYSCALL + JCC ok9 + MOVQ $-1, r1+80(FP) // r1 + MOVQ $0, r2+88(FP) // r2 + MOVQ AX, err+96(FP) // errno + CALL runtime·exitsyscall<ABIInternal>(SB) + RET +ok9: + MOVQ AX, r1+80(FP) // r1 + MOVQ DX, r2+88(FP) // r2 + MOVQ $0, err+96(FP) // errno + CALL runtime·exitsyscall<ABIInternal>(SB) + RET |