mirror of
https://github.com/golang/go
synced 2024-10-04 17:11:21 -06:00
653fb6d872
If there is a leading ·, assume there is a Go prototype and attach the Go prototype information to the function. If the function is not called from Go and does not need a Go prototype, it can be made file-local instead (using name<>(SB)). This fixes the current BSD build failures, by giving functions like sync/atomic.StoreUint32 argument stack map information. Fixes #8753. LGTM=khr, iant R=golang-codereviews, iant, khr, bradfitz CC=golang-codereviews, r, rlh https://golang.org/cl/142150043
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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#include "funcdata.h"
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//
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// System call support for 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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TEXT ·Syscall(SB),NOSPLIT,$0-64
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CALL runtime·entersyscall(SB)
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MOVQ 8(SP), BP // syscall entry
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// slide args down on top of system call number
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LEAQ 16(SP), SI
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LEAQ 8(SP), DI
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CLD
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MOVSQ
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MOVSQ
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MOVSQ
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SYSCALL
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MOVQ AX, r1+40(SP)
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MOVQ $0, r2+48(SP)
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CMPL AX, $-1
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JNE ok3
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SUBQ $16, SP
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CALL runtime·errstr(SB)
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MOVQ SP, SI
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ADDQ $16, SP
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JMP copyresult3
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ok3:
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LEAQ runtime·emptystring(SB), SI
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copyresult3:
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LEAQ err+56(SP), DI
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CLD
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MOVSQ
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MOVSQ
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·Syscall6(SB),NOSPLIT,$0-88
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CALL runtime·entersyscall(SB)
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MOVQ 8(SP), BP // syscall entry
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// slide args down on top of system call number
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LEAQ 16(SP), SI
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LEAQ 8(SP), DI
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CLD
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MOVSQ
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MOVSQ
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MOVSQ
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MOVSQ
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MOVSQ
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MOVSQ
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SYSCALL
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MOVQ AX, r1+64(SP)
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MOVQ $0, r2+72(SP)
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CMPL AX, $-1
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JNE ok4
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SUBQ $16, SP
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CALL runtime·errstr(SB)
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MOVQ SP, SI
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ADDQ $16, SP
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JMP copyresult4
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ok4:
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LEAQ runtime·emptystring(SB), SI
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copyresult4:
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LEAQ err+80(SP), DI
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CLD
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MOVSQ
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MOVSQ
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·RawSyscall(SB),NOSPLIT,$0-56
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MOVQ 8(SP), BP // syscall entry
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// slide args down on top of system call number
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LEAQ 16(SP), SI
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LEAQ 8(SP), DI
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CLD
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MOVSQ
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MOVSQ
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MOVSQ
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SYSCALL
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MOVQ AX, r1+40(SP)
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MOVQ AX, r2+48(SP)
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MOVQ AX, err+56(SP)
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RET
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TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
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MOVQ 8(SP), BP // syscall entry
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// slide args down on top of system call number
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LEAQ 16(SP), SI
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LEAQ 8(SP), DI
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CLD
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MOVSQ
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MOVSQ
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MOVSQ
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MOVSQ
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MOVSQ
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MOVSQ
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SYSCALL
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MOVQ AX, r1+64(SP)
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MOVQ AX, r2+72(SP)
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MOVQ AX, err+80(SP)
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RET
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#define SYS_SEEK 39 /* from zsysnum_plan9_amd64.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,$0-56
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LEAQ newoffset+40(SP), AX
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MOVQ AX, placeholder+8(SP)
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MOVQ $SYS_SEEK, BP // syscall entry
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SYSCALL
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CMPL AX, $-1
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JNE ok6
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MOVQ $-1, newoffset+40(SP)
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SUBQ $16, SP
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CALL syscall·errstr(SB)
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MOVQ SP, SI
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ADDQ $16, SP
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JMP copyresult6
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ok6:
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LEAQ runtime·emptystring(SB), SI
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copyresult6:
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LEAQ err+48(SP), DI
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CLD
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MOVSQ
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MOVSQ
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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,$8-8
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NO_LOCAL_POINTERS
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MOVQ code+0(FP), AX
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MOVQ AX, 0(SP)
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CALL runtime·exit(SB)
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RET
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