зеркало из https://github.com/golang/sys.git
go.sys/plan9: just jump to syscall.Syscall etc.
Don't re-implement these functions. LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/124350045
This commit is contained in:
Rob Pike
Родитель
4faa336c56
Коммит
ba5045e1e0
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@ -2,163 +2,29 @@
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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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// Just jump to package syscall's implementation for all these functions.
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// The runtime may know about them.
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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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JMP syscall·Syscall(SB)
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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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JMP syscall·Syscall6(SB)
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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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JMP syscall·RawSyscall(SB)
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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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TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
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JMP syscall·RawSyscall6(SB)
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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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JMP syscall·seek(SB)
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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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JMP syscall·exit(SB)
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@ -2,161 +2,29 @@
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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 Plan 9
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// System call support for amd64, 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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// Just jump to package syscall's implementation for all these functions.
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// The runtime may know about them.
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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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JMP syscall·Syscall(SB)
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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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JMP syscall·Syscall6(SB)
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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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JMP syscall·RawSyscall(SB)
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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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JMP syscall·RawSyscall6(SB)
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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 plan9·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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JMP syscall·seek(SB)
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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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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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JMP syscall·exit(SB)
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