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https://github.com/golang/go
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49a7da2dd9
syscall.Exit would originally kill only the calling Go proc, leaving behind other procs in the same group. This change makes syscall.Exit call runtime·exit, which due to CL https://golang.org/cl/5617048 will cleanly exit all the Go procs in the group. R=golang-dev, rsc, rminnich, remyoudompheng, ality, john CC=golang-dev, mirtchovski https://golang.org/cl/6036051
160 lines
2.7 KiB
ArmAsm
160 lines
2.7 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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//
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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),7,$0
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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 syscall·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),7,$0
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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 syscall·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),7,$0
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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),7,$0
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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),7,$0
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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 syscall·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),7,$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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