diff options
Diffstat (limited to 'src/pkg/syscall/asm_plan9_amd64.s')
| -rw-r--r-- | src/pkg/syscall/asm_plan9_amd64.s | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/pkg/syscall/asm_plan9_amd64.s b/src/pkg/syscall/asm_plan9_amd64.s new file mode 100644 index 000000000..e363b743c --- /dev/null +++ b/src/pkg/syscall/asm_plan9_amd64.s @@ -0,0 +1,165 @@ +// 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 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) + +// Trap # in BP, args on stack above caller pc. +// NxM requires that Plan 9 system calls be +// marked with $0x8000 in AX. +TEXT ·Syscall(SB),7,$0 + CALL runtime·entersyscall(SB) + MOVQ $0x8000, AX // for NxM + 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 syscall·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),7,$0 + CALL runtime·entersyscall(SB) + MOVQ $0x8000, AX // for NxM + 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 syscall·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),7,$0 + MOVQ $0x8000, AX // for NxM + 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),7,$0 + MOVQ $0x8000, AX // for NxM + 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),7,$0 + LEAQ newoffset+40(SP), AX + MOVQ AX, placeholder+8(SP) + + MOVQ $0x8000, AX // for NxM + 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),7,$8 + MOVQ code+0(FP), AX + MOVQ AX, 0(SP) + CALL runtime·exit(SB) + RET |