diff options
Diffstat (limited to 'src/syscall/asm_plan9_arm.s')
| -rw-r--r-- | src/syscall/asm_plan9_arm.s | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/syscall/asm_plan9_arm.s b/src/syscall/asm_plan9_arm.s new file mode 100644 index 0000000..d193614 --- /dev/null +++ b/src/syscall/asm_plan9_arm.s @@ -0,0 +1,132 @@ +// 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 |