blob: 4972597c40fb6b32e878c3b835bbc3c8cb48176a [file] [log] [blame]
// 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"
#define SYS_SEEK 39 /* from zsysnum_plan9.go */
// System call support for plan9 on arm
TEXT sysresult<>(SB),NOSPLIT,$12
MOVW $·emptystring+0(SB), R2
CMP $-1, R0
B.NE ok
MOVW R1, save-4(SP)
BL runtime·errstr(SB)
MOVW save-4(SP), R1
MOVW $err-12(SP), R2
ok:
MOVM.IA (R2), [R3-R4]
MOVM.IA [R3-R4], (R1)
RET
//func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err ErrorString)
TEXT ·Syscall(SB),NOSPLIT,$0-32
BL runtime·entersyscall(SB)
MOVW trap+0(FP), R0 // syscall num
MOVM.IA.W (R13),[R1-R2] // pop LR and caller's LR
SWI $0
MOVM.DB.W [R1-R2],(R13) // push LR and caller's LR
MOVW $0, R2
MOVW $r1+16(FP), R1
MOVM.IA.W [R0,R2], (R1)
BL sysresult<>(SB)
BL runtime·exitsyscall(SB)
RET
//func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err ErrorString)
// Actually Syscall5 but the rest of the code expects it to be named Syscall6.
TEXT ·Syscall6(SB),NOSPLIT,$0-44
BL runtime·entersyscall(SB)
MOVW trap+0(FP), R0 // syscall num
MOVM.IA.W (R13),[R1-R2] // pop LR and caller's LR
SWI $0
MOVM.DB.W [R1-R2],(R13) // push LR and caller's LR
MOVW $0, R1
MOVW $r1+28(FP), R1
MOVM.IA.W [R0,R2], (R1)
BL sysresult<>(SB)
BL runtime·exitsyscall(SB)
RET
//func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
TEXT ·RawSyscall(SB),NOSPLIT,$0-28
MOVW trap+0(FP), R0 // syscall num
MOVM.IA.W (R13),[R1] // pop caller's LR
SWI $0
MOVM.DB.W [R1],(R13) // push caller's LR
MOVW R0, r1+16(FP)
MOVW R0, r2+20(FP)
MOVW R0, err+24(FP)
RET
//func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
// Actually RawSyscall5 but the rest of the code expects it to be named RawSyscall6.
TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
MOVW trap+0(FP), R0 // syscall num
MOVM.IA.W (R13),[R1] // pop caller's LR
SWI $0
MOVM.DB.W [R1],(R13) // push caller's LR
MOVW R0, r1+28(FP)
MOVW R0, r2+32(FP)
MOVW R0, err+36(FP)
RET
//func seek(placeholder uintptr, fd int, offset int64, whence int) (newoffset int64, err string)
TEXT ·seek(SB),NOSPLIT,$0-36
MOVW $newoffset_lo+20(FP), R5
MOVW R5, placeholder+0(FP) //placeholder = dest for return value
MOVW $SYS_SEEK, R0 // syscall num
MOVM.IA.W (R13),[R1] // pop LR
SWI $0
MOVM.DB.W [R1],(R13) // push LR
CMP $-1, R0
MOVW.EQ R0, 0(R5)
MOVW.EQ R0, 4(R5)
MOVW $err+28(FP), R1
BL sysresult<>(SB)
RET