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https://github.com/golang/go
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88e984faa5
Add openbsd 386 syscall support, partially based on the existing freebsd 386 syscall implementation. FTR zerrors_openbsd_386.go cannot currently be completely built on openbsd/i386 due to what appears to be a gcc bug. The constants can be successfully generated with -m32 on openbsd/amd64 and the error table can then be generated on openbsd/i386. R=rsc CC=golang-dev https://golang.org/cl/4969045
138 lines
2.5 KiB
ArmAsm
138 lines
2.5 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, OpenBSD
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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),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 $0x80
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JAE ok
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MOVL $-1, 20(SP) // r1
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MOVL $-1, 24(SP) // r2
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MOVL AX, 28(SP) // 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, 20(SP) // r1
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MOVL DX, 24(SP) // r2
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MOVL $0, 28(SP) // errno
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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 $0x80
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JAE ok6
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MOVL $-1, 32(SP) // r1
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MOVL $-1, 36(SP) // r2
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MOVL AX, 40(SP) // 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, 32(SP) // r1
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MOVL DX, 36(SP) // r2
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MOVL $0, 40(SP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·Syscall9(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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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, 44(SP) // r1
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MOVL $-1, 48(SP) // r2
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MOVL AX, 52(SP) // 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, 44(SP) // r1
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MOVL DX, 48(SP) // r2
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MOVL $0, 52(SP) // errno
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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 $0x80
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JAE ok1
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MOVL $-1, 20(SP) // r1
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MOVL $-1, 24(SP) // r2
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MOVL AX, 28(SP) // errno
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RET
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ok1:
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MOVL AX, 20(SP) // r1
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MOVL DX, 24(SP) // r2
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MOVL $0, 28(SP) // errno
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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 $0x80
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JAE ok2
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MOVL $-1, 32(SP) // r1
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MOVL $-1, 36(SP) // r2
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MOVL AX, 40(SP) // errno
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RET
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ok2:
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MOVL AX, 32(SP) // r1
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MOVL DX, 36(SP) // r2
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MOVL $0, 40(SP) // errno
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RET
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