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Richard Millerbradfitz
Richard Miller
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bradfitz
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syscall: new files for plan_arm support
Implementation closely follows plan9_386 version. Change-Id: Ifb76e001fb5664e6a23541cf4768d7f11b2be68b Reviewed-on: https://go-review.googlesource.com/18967 Reviewed-by: Brad Fitzpatrick <[email protected]> Run-TryBot: Brad Fitzpatrick <[email protected]> TryBot-Result: Gobot Gobot <[email protected]>
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‎src/syscall/asm_plan9_arm.s

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@@ -0,0 +1,97 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "textflag.h"
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#define SYS_SEEK 39 /* from zsysnum_plan9.go */
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// System call support for plan9 on arm
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TEXT sysresult<>(SB),NOSPLIT,$12
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MOVW $runtime·emptystring+0(SB), R2
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CMP $-1, R0
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B.NE ok
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MOVW R1, save-4(SP)
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BL runtime·errstr(SB)
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MOVW save-4(SP), R1
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MOVW $err-12(SP), R2
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ok:
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MOVM.IA (R2), [R3-R4]
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MOVM.IA [R3-R4], (R1)
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RET
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//func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err ErrorString)
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TEXT ·Syscall(SB),NOSPLIT,$0
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BL runtime·entersyscall(SB)
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MOVW trap+0(FP), R0 // syscall num
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MOVM.IA.W (R13),[R1-R2] // pop LR and caller's LR
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SWI 0
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MOVM.DB.W [R1-R2],(R13) // push LR and caller's LR
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MOVW $0, R2
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MOVW $r1+16(FP), R1
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MOVM.IA.W [R0,R2], (R1)
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BL sysresult<>(SB)
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BL runtime·exitsyscall(SB)
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RET
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//func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err ErrorString)
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// Actually Syscall5 but the rest of the code expects it to be named Syscall6.
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TEXT ·Syscall6(SB),NOSPLIT,$0
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BL runtime·entersyscall(SB)
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MOVW trap+0(FP), R0 // syscall num
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MOVM.IA.W (R13),[R1-R2] // pop LR and caller's LR
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SWI 0
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MOVM.DB.W [R1-R2],(R13) // push LR and caller's LR
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MOVW $0, R1
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MOVW $r1+28(FP), R1
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MOVM.IA.W [R0,R2], (R1)
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BL sysresult<>(SB)
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BL runtime·exitsyscall(SB)
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RET
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//func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
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TEXT ·RawSyscall(SB),NOSPLIT,$0
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MOVW trap+0(FP), R0 // syscall num
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MOVM.IA.W (R13),[R1] // pop caller's LR
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SWI 0
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MOVM.DB.W [R1],(R13) // push caller's LR
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MOVW R0, r1+16(FP)
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MOVW R0, r2+20(FP)
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MOVW R0, err+24(FP)
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RET
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//func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
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// Actually RawSyscall5 but the rest of the code expects it to be named RawSyscall6.
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TEXT ·RawSyscall6(SB),NOSPLIT,$0
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MOVW trap+0(FP), R0 // syscall num
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MOVM.IA.W (R13),[R1] // pop caller's LR
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SWI 0
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MOVM.DB.W [R1],(R13) // push caller's LR
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MOVW R0, r1+28(FP)
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MOVW R0, r2+32(FP)
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MOVW R0, err+36(FP)
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RET
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//func seek(placeholder uintptr, fd int, offset int64, whence int) (newoffset int64, err string)
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TEXT ·seek(SB),NOSPLIT,$0
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MOVW $newoffset_lo+20(FP), R5
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MOVW R5, placeholder+0(FP) //placeholder = dest for return value
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MOVW $SYS_SEEK, R0 // syscall num
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MOVM.IA.W (R13),[R1] // pop LR
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SWI 0
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MOVM.DB.W [R1],(R13) // push LR
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CMP $-1, R0
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MOVW.EQ R0, 0(R5)
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MOVW.EQ R0, 4(R5)
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MOVW $err+28(FP), R1
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BL sysresult<>(SB)
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RET
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//func exit(code int)
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// Import runtime·exit for cleanly exiting.
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TEXT ·exit(SB),NOSPLIT,$4
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MOVW code+0(FP), R0
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MOVW R0, e-4(SP)
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BL runtime·exit(SB)
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RET

‎src/syscall/zsyscall_plan9_arm.go

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// mksyscall.pl -l32 -plan9 syscall_plan9.go
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// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
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// +build arm,plan9
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package syscall
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import "unsafe"
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func fd2path(fd int, buf []byte) (err error) {
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var _p0 unsafe.Pointer
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if len(buf) > 0 {
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_p0 = unsafe.Pointer(&buf[0])
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} else {
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_p0 = unsafe.Pointer(&_zero)
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}
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r0, _, e1 := Syscall(SYS_FD2PATH, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func pipe(p *[2]int32) (err error) {
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r0, _, e1 := Syscall(SYS_PIPE, uintptr(unsafe.Pointer(p)), 0, 0)
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func await(s []byte) (n int, err error) {
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var _p0 unsafe.Pointer
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if len(s) > 0 {
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_p0 = unsafe.Pointer(&s[0])
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} else {
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_p0 = unsafe.Pointer(&_zero)
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}
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r0, _, e1 := Syscall(SYS_AWAIT, uintptr(_p0), uintptr(len(s)), 0)
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n = int(r0)
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func open(path string, mode int) (fd int, err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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r0, _, e1 := Syscall(SYS_OPEN, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
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use(unsafe.Pointer(_p0))
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fd = int(r0)
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func create(path string, mode int, perm uint32) (fd int, err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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r0, _, e1 := Syscall(SYS_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
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use(unsafe.Pointer(_p0))
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fd = int(r0)
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func remove(path string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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r0, _, e1 := Syscall(SYS_REMOVE, uintptr(unsafe.Pointer(_p0)), 0, 0)
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use(unsafe.Pointer(_p0))
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func stat(path string, edir []byte) (n int, err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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var _p1 unsafe.Pointer
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if len(edir) > 0 {
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_p1 = unsafe.Pointer(&edir[0])
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} else {
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_p1 = unsafe.Pointer(&_zero)
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}
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r0, _, e1 := Syscall(SYS_STAT, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(edir)))
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use(unsafe.Pointer(_p0))
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n = int(r0)
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func bind(name string, old string, flag int) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(name)
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if err != nil {
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return
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}
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var _p1 *byte
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_p1, err = BytePtrFromString(old)
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if err != nil {
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return
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}
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r0, _, e1 := Syscall(SYS_BIND, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(flag))
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use(unsafe.Pointer(_p0))
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use(unsafe.Pointer(_p1))
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func mount(fd int, afd int, old string, flag int, aname string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(old)
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if err != nil {
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return
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}
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var _p1 *byte
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_p1, err = BytePtrFromString(aname)
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if err != nil {
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return
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}
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r0, _, e1 := Syscall6(SYS_MOUNT, uintptr(fd), uintptr(afd), uintptr(unsafe.Pointer(_p0)), uintptr(flag), uintptr(unsafe.Pointer(_p1)), 0)
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use(unsafe.Pointer(_p0))
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use(unsafe.Pointer(_p1))
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func wstat(path string, edir []byte) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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var _p1 unsafe.Pointer
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if len(edir) > 0 {
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_p1 = unsafe.Pointer(&edir[0])
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} else {
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_p1 = unsafe.Pointer(&_zero)
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}
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r0, _, e1 := Syscall(SYS_WSTAT, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(edir)))
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use(unsafe.Pointer(_p0))
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func chdir(path string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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r0, _, e1 := Syscall(SYS_CHDIR, uintptr(unsafe.Pointer(_p0)), 0, 0)
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use(unsafe.Pointer(_p0))
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Dup(oldfd int, newfd int) (fd int, err error) {
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r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), uintptr(newfd), 0)
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fd = int(r0)
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Pread(fd int, p []byte, offset int64) (n int, err error) {
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var _p0 unsafe.Pointer
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if len(p) > 0 {
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_p0 = unsafe.Pointer(&p[0])
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} else {
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_p0 = unsafe.Pointer(&_zero)
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}
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r0, _, e1 := Syscall6(SYS_PREAD, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
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n = int(r0)
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
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var _p0 unsafe.Pointer
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if len(p) > 0 {
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_p0 = unsafe.Pointer(&p[0])
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} else {
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_p0 = unsafe.Pointer(&_zero)
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}
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r0, _, e1 := Syscall6(SYS_PWRITE, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
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n = int(r0)
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Close(fd int) (err error) {
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r0, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Fstat(fd int, edir []byte) (n int, err error) {
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var _p0 unsafe.Pointer
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if len(edir) > 0 {
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_p0 = unsafe.Pointer(&edir[0])
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} else {
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_p0 = unsafe.Pointer(&_zero)
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}
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r0, _, e1 := Syscall(SYS_FSTAT, uintptr(fd), uintptr(_p0), uintptr(len(edir)))
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n = int(r0)
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if int32(r0) == -1 {
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err = e1
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Fwstat(fd int, edir []byte) (err error) {
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var _p0 unsafe.Pointer
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if len(edir) > 0 {
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_p0 = unsafe.Pointer(&edir[0])
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} else {
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_p0 = unsafe.Pointer(&_zero)
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}
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r0, _, e1 := Syscall(SYS_FWSTAT, uintptr(fd), uintptr(_p0), uintptr(len(edir)))
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if int32(r0) == -1 {
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err = e1
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}
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return
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}

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