mirror of https://go.googlesource.com/go
143 lines
2.7 KiB
ArmAsm
143 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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//go:build freebsd || netbsd
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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 some 386 unixes
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//
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// func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32);
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// func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32);
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// Trap # in AX, args on stack above caller pc.
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TEXT ·Syscall(SB),NOSPLIT,$0-28
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CALL runtime·entersyscall(SB)
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MOVL trap+0(FP), AX // syscall entry
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// slide args down on top of system call number
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LEAL a1+4(FP), SI
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LEAL trap+0(FP), 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 $0x80
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JAE ok
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MOVL $-1, r1+16(FP) // r1
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MOVL $-1, r2+20(FP) // r2
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MOVL AX, err+24(FP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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ok:
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MOVL AX, r1+16(FP) // r1
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MOVL DX, r2+20(FP) // r2
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MOVL $0, err+24(FP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·Syscall6(SB),NOSPLIT,$0-40
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CALL runtime·entersyscall(SB)
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MOVL trap+0(FP), AX // syscall entry
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// slide args down on top of system call number
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LEAL a1+4(FP), SI
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LEAL trap+0(FP), 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 $0x80
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JAE ok6
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MOVL $-1, r1+28(FP) // r1
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MOVL $-1, r2+32(FP) // r2
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MOVL AX, err+36(FP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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ok6:
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MOVL AX, r1+28(FP) // r1
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MOVL DX, r2+32(FP) // r2
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MOVL $0, err+36(FP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·Syscall9(SB),NOSPLIT,$0-52
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CALL runtime·entersyscall(SB)
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MOVL num+0(FP), AX // syscall entry
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// slide args down on top of system call number
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LEAL a1+4(FP), SI
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LEAL num+0(FP), 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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MOVSL
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MOVSL
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MOVSL
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INT $0x80
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JAE ok9
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MOVL $-1, r1+40(FP) // r1
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MOVL $-1, r2+44(FP) // r2
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MOVL AX, err+48(FP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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ok9:
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MOVL AX, r1+40(FP) // r1
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MOVL DX, r2+44(FP) // r2
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MOVL $0, err+48(FP) // errno
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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 trap+0(FP), AX // syscall entry
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// slide args down on top of system call number
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LEAL a1+4(FP), SI
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LEAL trap+0(FP), 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 $0x80
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JAE ok1
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MOVL $-1, r1+16(FP) // r1
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MOVL $-1, r2+20(FP) // r2
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MOVL AX, err+24(FP) // errno
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RET
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ok1:
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MOVL AX, r1+16(FP) // r1
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MOVL DX, r2+20(FP) // r2
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MOVL $0, err+24(FP) // errno
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RET
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TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
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MOVL trap+0(FP), AX // syscall entry
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// slide args down on top of system call number
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LEAL a1+4(FP), SI
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LEAL trap+0(FP), 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 $0x80
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JAE ok2
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MOVL $-1, r1+28(FP) // r1
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MOVL $-1, r2+32(FP) // r2
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MOVL AX, err+36(FP) // errno
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RET
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ok2:
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MOVL AX, r1+28(FP) // r1
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MOVL DX, r2+32(FP) // r2
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MOVL $0, err+36(FP) // errno
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RET
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