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| // 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_ERRSTR 41 /* from zsysnum_plan9.go */
| #define SYS_SEEK 39 /* from zsysnum_plan9.go */
|
| // System call support for plan9 on arm
|
| //func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err ErrorString)
| TEXT ·Syscall(SB),NOSPLIT,$144-32
| NO_LOCAL_POINTERS
| BL runtime·entersyscall(SB)
| MOVW $a1+4(FP), R0 // move syscall args
| MOVW $sysargs-144(SP), R1
| MOVM.IA (R0), [R2-R4]
| MOVM.IA [R2-R4], (R1)
| MOVW trap+0(FP), R0 // syscall num
| SWI $0
| MOVW $0, R2
| MOVW $r1+16(FP), R3
| MOVM.IA [R0,R2], (R3)
| CMP $-1, R0
| B.EQ syscallerr
| BL runtime·exitsyscall(SB)
| MOVW $·emptystring+0(SB), R2
| B syscallok
| syscallerr:
| MOVW $errbuf-128(SP), R2
| MOVW $128, R3
| MOVM.IA [R2,R3], (R1)
| MOVW $SYS_ERRSTR, R0
| SWI $0
| BL runtime·exitsyscall(SB)
| BL runtime·gostring(SB)
| MOVW $str-140(SP), R2
| syscallok:
| MOVW $err+24(FP), R1
| MOVM.IA (R2), [R3-R4]
| MOVM.IA [R3-R4], (R1)
| 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,$144-44
| NO_LOCAL_POINTERS
| BL runtime·entersyscall(SB)
| MOVW $a1+4(FP), R0 // move syscall args
| MOVW $sysargs-144(SP), R1
| MOVM.IA (R0), [R2-R6]
| MOVM.IA [R2-R6], (R1)
| MOVW trap+0(FP), R0 // syscall num
| SWI $0
| MOVW $0, R2
| MOVW $r1+28(FP), R3
| MOVM.IA.W [R0,R2], (R3)
| CMP $-1, R0
| B.EQ syscall6err
| BL runtime·exitsyscall(SB)
| MOVW $·emptystring+0(SB), R2
| B syscall6ok
| syscall6err:
| MOVW $errbuf-128(SP), R2
| MOVW $128, R3
| MOVM.IA [R2,R3], (R1)
| MOVW $SYS_ERRSTR, R0
| SWI $0
| BL runtime·exitsyscall(SB)
| BL runtime·gostring(SB)
| MOVW $str-140(SP), R2
| syscall6ok:
| MOVW $err+36(FP), R1
| MOVM.IA (R2), [R3-R4]
| MOVM.IA [R3-R4], (R1)
| RET
|
| //func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
| TEXT ·RawSyscall(SB),NOSPLIT,$12-28
| MOVW $a1+4(FP), R0 // move syscall args
| MOVW $sysargs-12(SP), R1
| MOVM.IA (R0), [R2-R4]
| MOVM.IA [R2-R4], (R1)
| MOVW trap+0(FP), R0 // syscall num
| SWI $0
| 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,$20-40
| MOVW $a1+4(FP), R0 // move syscall args
| MOVW $sysargs-20(SP), R1
| MOVM.IA (R0), [R2-R6]
| MOVM.IA [R2-R6], (R1)
| MOVW trap+0(FP), R0 // syscall num
| SWI $0
| 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,$20-36
| NO_LOCAL_POINTERS
| MOVW $newoffset_lo+20(FP), R6
| MOVW R6, sysargs-20(SP) // dest for return value
| MOVW $fd+4(FP), R0 // move syscall args
| MOVW $sysarg1-16(SP), R1
| MOVM.IA (R0), [R2-R5]
| MOVM.IA [R2-R5], (R1)
| MOVW $SYS_SEEK, R0 // syscall num
| SWI $0
| CMP $-1, R0
| B.EQ seekerr
| MOVW $·emptystring+0(SB), R2
| B seekok
| seekerr:
| MOVW R0, 0(R6)
| MOVW R0, 4(R6)
| BL ·errstr(SB)
| MOVW $ret-20(SP), R2
| seekok:
| MOVW $err+28(FP), R1
| MOVM.IA (R2), [R3-R4]
| MOVM.IA [R3-R4], (R1)
| RET
|
|
