| Index: plan9/asm_plan9_amd64.s |
| =================================================================== |
| new file mode 100644 |
| --- /dev/null |
| +++ b/plan9/asm_plan9_amd64.s |
| @@ -0,0 +1,162 @@ |
| +// 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 "../../cmd/ld/textflag.h" |
| + |
| +// |
| +// System call support for Plan 9 |
| +// |
| + |
| +//func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err string) |
| +//func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err string) |
| +//func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) |
| +//func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) |
| + |
| +TEXT ·Syscall(SB),NOSPLIT,$0-64 |
| + CALL runtime·entersyscall(SB) |
| + MOVQ 8(SP), BP // syscall entry |
| + // slide args down on top of system call number |
| + LEAQ 16(SP), SI |
| + LEAQ 8(SP), DI |
| + CLD |
| + MOVSQ |
| + MOVSQ |
| + MOVSQ |
| + SYSCALL |
| + MOVQ AX, r1+40(SP) |
| + MOVQ $0, r2+48(SP) |
| + CMPL AX, $-1 |
| + JNE ok3 |
| + |
| + SUBQ $16, SP |
| + CALL runtime·errstr(SB) |
| + MOVQ SP, SI |
| + ADDQ $16, SP |
| + JMP copyresult3 |
| + |
| +ok3: |
| + LEAQ runtime·emptystring(SB), SI |
| + |
| +copyresult3: |
| + LEAQ err+56(SP), DI |
| + |
| + CLD |
| + MOVSQ |
| + MOVSQ |
| + |
| + CALL runtime·exitsyscall(SB) |
| + RET |
| + |
| +TEXT ·Syscall6(SB),NOSPLIT,$0-88 |
| + CALL runtime·entersyscall(SB) |
| + MOVQ 8(SP), BP // syscall entry |
| + // slide args down on top of system call number |
| + LEAQ 16(SP), SI |
| + LEAQ 8(SP), DI |
| + CLD |
| + MOVSQ |
| + MOVSQ |
| + MOVSQ |
| + MOVSQ |
| + MOVSQ |
| + MOVSQ |
| + SYSCALL |
| + MOVQ AX, r1+64(SP) |
| + MOVQ $0, r2+72(SP) |
| + CMPL AX, $-1 |
| + JNE ok4 |
| + |
| + SUBQ $16, SP |
| + CALL runtime·errstr(SB) |
| + MOVQ SP, SI |
| + ADDQ $16, SP |
| + JMP copyresult4 |
| + |
| +ok4: |
| + LEAQ runtime·emptystring(SB), SI |
| + |
| +copyresult4: |
| + LEAQ err+80(SP), DI |
| + |
| + CLD |
| + MOVSQ |
| + MOVSQ |
| + |
| + CALL runtime·exitsyscall(SB) |
| + RET |
| + |
| +TEXT ·RawSyscall(SB),NOSPLIT,$0-56 |
| + MOVQ 8(SP), BP // syscall entry |
| + // slide args down on top of system call number |
| + LEAQ 16(SP), SI |
| + LEAQ 8(SP), DI |
| + CLD |
| + MOVSQ |
| + MOVSQ |
| + MOVSQ |
| + SYSCALL |
| + MOVQ AX, r1+40(SP) |
| + MOVQ AX, r2+48(SP) |
| + MOVQ AX, err+56(SP) |
| + RET |
| + |
| +TEXT ·RawSyscall6(SB),NOSPLIT,$0-80 |
| + MOVQ 8(SP), BP // syscall entry |
| + // slide args down on top of system call number |
| + LEAQ 16(SP), SI |
| + LEAQ 8(SP), DI |
| + CLD |
| + MOVSQ |
| + MOVSQ |
| + MOVSQ |
| + MOVSQ |
| + MOVSQ |
| + MOVSQ |
| + SYSCALL |
| + MOVQ AX, r1+64(SP) |
| + MOVQ AX, r2+72(SP) |
| + MOVQ AX, err+80(SP) |
| + RET |
| + |
| +#define SYS_SEEK 39 /* from zsysnum_plan9_amd64.go */ |
| + |
| +//func seek(placeholder uintptr, fd int, offset int64, whence int) (newoffset int64, err string) |
| +TEXT ·seek(SB),NOSPLIT,$0-56 |
| + LEAQ newoffset+40(SP), AX |
| + MOVQ AX, placeholder+8(SP) |
| + |
| + MOVQ $SYS_SEEK, BP // syscall entry |
| + SYSCALL |
| + |
| + CMPL AX, $-1 |
| + JNE ok6 |
| + MOVQ $-1, newoffset+40(SP) |
| + |
| + SUBQ $16, SP |
| + CALL syscall·errstr(SB) |
| + MOVQ SP, SI |
| + ADDQ $16, SP |
| + JMP copyresult6 |
| + |
| +ok6: |
| + LEAQ runtime·emptystring(SB), SI |
| + |
| +copyresult6: |
| + LEAQ err+48(SP), DI |
| + |
| + CLD |
| + MOVSQ |
| + MOVSQ |
| + RET |
| + |
| +//func exit(code int) |
| +// Import runtime·exit for cleanly exiting. |
| +TEXT ·exit(SB),NOSPLIT,$8-8 |
| + MOVQ code+0(FP), AX |
| + MOVQ AX, 0(SP) |
| + CALL runtime·exit(SB) |
| + RET |
