diff options
Diffstat (limited to 'src/syscall/asm_plan9_386.s')
| -rw-r--r-- | src/syscall/asm_plan9_386.s | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/syscall/asm_plan9_386.s b/src/syscall/asm_plan9_386.s new file mode 100644 index 0000000..7a2c2da --- /dev/null +++ b/src/syscall/asm_plan9_386.s @@ -0,0 +1,178 @@ +// 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. + +#include "textflag.h" +#include "funcdata.h" + +// +// System call support for 386, 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) + +#define SYS_ERRSTR 41 /* from zsysnum_plan9.go */ + +// Trap # in AX, args on stack above caller pc. +TEXT ·Syscall(SB),NOSPLIT,$148-32 + NO_LOCAL_POINTERS + CALL runtime·entersyscall(SB) + MOVL trap+0(FP), AX // syscall entry + // copy args down + LEAL a1+4(FP), SI + LEAL sysargs-144(SP), DI + CLD + MOVSL + MOVSL + MOVSL + INT $64 + MOVL AX, r1+16(FP) + MOVL $0, r2+20(FP) + CMPL AX, $-1 + JNE ok3 + + LEAL errbuf-128(SP), AX + MOVL AX, sysargs-144(SP) + MOVL $128, sysargs1-140(SP) + MOVL $SYS_ERRSTR, AX + INT $64 + CALL runtime·exitsyscall(SB) + MOVL sysargs-144(SP), AX + MOVL AX, errbuf-148(SP) + CALL runtime·gostring(SB) + LEAL str-144(SP), SI + JMP copyresult3 + +ok3: + CALL runtime·exitsyscall(SB) + LEAL ·emptystring(SB), SI + +copyresult3: + LEAL err+24(FP), DI + + CLD + MOVSL + MOVSL + + RET + +TEXT ·Syscall6(SB),NOSPLIT,$148-44 + NO_LOCAL_POINTERS + CALL runtime·entersyscall(SB) + MOVL trap+0(FP), AX // syscall entry + // copy args down + LEAL a1+4(FP), SI + LEAL sysargs-144(SP), DI + CLD + MOVSL + MOVSL + MOVSL + MOVSL + MOVSL + MOVSL + INT $64 + MOVL AX, r1+28(FP) + MOVL $0, r2+32(FP) + CMPL AX, $-1 + JNE ok4 + + LEAL errbuf-128(SP), AX + MOVL AX, sysargs-144(SP) + MOVL $128, sysargs1-140(SP) + MOVL $SYS_ERRSTR, AX + INT $64 + CALL runtime·exitsyscall(SB) + MOVL sysargs-144(SP), AX + MOVL AX, errbuf-148(SP) + CALL runtime·gostring(SB) + LEAL str-144(SP), SI + JMP copyresult4 + +ok4: + CALL runtime·exitsyscall(SB) + LEAL ·emptystring(SB), SI + +copyresult4: + LEAL err+36(FP), DI + + CLD + MOVSL + MOVSL + + RET + +TEXT ·RawSyscall(SB),NOSPLIT,$0-28 + MOVL trap+0(FP), AX // syscall entry + // slide args down on top of system call number + LEAL a1+4(FP), SI + LEAL trap+0(FP), DI + CLD + MOVSL + MOVSL + MOVSL + INT $64 + MOVL AX, r1+16(FP) + MOVL AX, r2+20(FP) + MOVL AX, err+24(FP) + RET + +TEXT ·RawSyscall6(SB),NOSPLIT,$0-40 + MOVL trap+0(FP), AX // syscall entry + // slide args down on top of system call number + LEAL a1+4(FP), SI + LEAL trap+0(FP), DI + CLD + MOVSL + MOVSL + MOVSL + MOVSL + MOVSL + MOVSL + INT $64 + MOVL AX, r1+28(FP) + MOVL AX, r2+32(FP) + MOVL AX, err+36(FP) + RET + +#define SYS_SEEK 39 /* from zsysnum_plan9.go */ + +//func seek(placeholder uintptr, fd int, offset int64, whence int) (newoffset int64, err string) +TEXT ·seek(SB),NOSPLIT,$24-36 + NO_LOCAL_POINTERS + LEAL newoffset+20(FP), AX + MOVL AX, placeholder+0(FP) + + // copy args down + LEAL placeholder+0(FP), SI + LEAL sysargs-20(SP), DI + CLD + MOVSL + MOVSL + MOVSL + MOVSL + MOVSL + MOVL $SYS_SEEK, AX // syscall entry + INT $64 + + CMPL AX, $-1 + JNE ok6 + MOVL AX, newoffset_lo+20(FP) + MOVL AX, newoffset_hi+24(FP) + + CALL syscall·errstr(SB) + MOVL SP, SI + JMP copyresult6 + +ok6: + LEAL ·emptystring(SB), SI + +copyresult6: + LEAL err+28(FP), DI + + CLD + MOVSL + MOVSL + RET |