mirror of
https://github.com/rwinkhart/sys.git
synced 2026-08-28 04:46:44 -04:00
Rob Pike
8768103c90
Darwin/amd64 now builds. No others tested yet. mkall.sh also runs correctly. The updates, which are substantial, are not yet applied to avoid unnecessary churn. Restore mkerrors.sh, which is needed in the unix directory. LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/122410044
165 lines
2.9 KiB
ArmAsm
165 lines
2.9 KiB
ArmAsm
// 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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// TODO(rsc): Rewrite all nn(SP) references into name+(nn-8)(FP)
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// so that go vet can check that they are correct.
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#include "textflag.h"
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//
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// System call support for 386, Plan 9
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//
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//func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err string)
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//func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err string)
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//func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
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//func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
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// Trap # in AX, args on stack above caller pc.
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TEXT ·Syscall(SB),NOSPLIT,$0-32
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CALL runtime·entersyscall(SB)
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MOVL 4(SP), AX // syscall entry
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// slide args down on top of system call number
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LEAL 8(SP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL
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MOVSL
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MOVSL
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INT $64
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MOVL AX, r1+20(SP)
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MOVL $0, r2+24(SP)
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CMPL AX, $-1
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JNE ok3
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SUBL $8, SP
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CALL runtime·errstr(SB)
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MOVL SP, SI
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ADDL $8, SP
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JMP copyresult3
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ok3:
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LEAL runtime·emptystring(SB), SI
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copyresult3:
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LEAL err+28(SP), DI
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CLD
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MOVSL
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MOVSL
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·Syscall6(SB),NOSPLIT,$0-44
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CALL runtime·entersyscall(SB)
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MOVL 4(SP), AX // syscall entry
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// slide args down on top of system call number
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LEAL 8(SP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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INT $64
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MOVL AX, r1+32(SP)
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MOVL $0, r2+36(SP)
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CMPL AX, $-1
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JNE ok4
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SUBL $8, SP
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CALL runtime·errstr(SB)
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MOVL SP, SI
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ADDL $8, SP
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JMP copyresult4
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ok4:
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LEAL runtime·emptystring(SB), SI
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copyresult4:
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LEAL err+40(SP), DI
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CLD
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MOVSL
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MOVSL
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·RawSyscall(SB),NOSPLIT,$0-28
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MOVL 4(SP), AX // syscall entry
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// slide args down on top of system call number
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LEAL 8(SP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL
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MOVSL
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MOVSL
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INT $64
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MOVL AX, r1+20(SP)
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MOVL AX, r2+24(SP)
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MOVL AX, err+28(SP)
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RET
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TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
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MOVL 4(SP), AX // syscall entry
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// slide args down on top of system call number
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LEAL 8(SP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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INT $64
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MOVL AX, r1+32(SP)
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MOVL AX, r2+36(SP)
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MOVL AX, err+40(SP)
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RET
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#define SYS_SEEK 39 /* from zsysnum_plan9_386.go */
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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,$0-36
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LEAL newoffset+24(SP), AX
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MOVL AX, placeholder+4(SP)
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MOVL $SYS_SEEK, AX // syscall entry
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INT $64
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CMPL AX, $-1
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JNE ok6
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MOVL AX, 24(SP) // newoffset low
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MOVL AX, 28(SP) // newoffset high
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SUBL $8, SP
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CALL plan9·errstr(SB)
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MOVL SP, SI
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ADDL $8, SP
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JMP copyresult6
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ok6:
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LEAL runtime·emptystring(SB), SI
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copyresult6:
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LEAL err+32(SP), DI
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CLD
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MOVSL
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MOVSL
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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,$4-4
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MOVL code+0(FP), AX
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MOVL AX, 0(SP)
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CALL runtime·exit(SB)
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RET
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