2008-07-26 15:49:21 -06:00
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// 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 calls for AMD64, Linux
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//
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2008-07-29 15:44:48 -06:00
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// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64);
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2008-08-04 17:43:49 -06:00
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// Trap # in AX, args in DI SI DX R10 R8 R9, return in AX DX
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// Note that this differs from "standard" ABI convention, which
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// would pass 4th arg in CX, not R10.
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2008-07-29 15:44:48 -06:00
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2008-11-25 17:48:10 -07:00
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TEXT syscall·Syscall(SB),7,$0
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CALL sys·entersyscall(SB)
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2008-07-29 15:44:48 -06:00
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MOVQ 16(SP), DI
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MOVQ 24(SP), SI
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MOVQ 32(SP), DX
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MOVQ 8(SP), AX // syscall entry
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2008-07-26 15:49:21 -06:00
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SYSCALL
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CMPQ AX, $0xfffffffffffff001
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2008-11-25 17:48:10 -07:00
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JLS ok
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2008-07-29 15:44:48 -06:00
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MOVQ $-1, 40(SP) // r1
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MOVQ $0, 48(SP) // r2
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2008-07-26 15:49:21 -06:00
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NEGQ AX
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2008-07-29 15:44:48 -06:00
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MOVQ AX, 56(SP) // errno
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2008-11-25 17:48:10 -07:00
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CALL sys·exitsyscall(SB)
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2008-07-26 15:49:21 -06:00
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RET
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2008-11-25 17:48:10 -07:00
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ok:
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2008-07-29 15:44:48 -06:00
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MOVQ AX, 40(SP) // r1
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MOVQ DX, 48(SP) // r2
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MOVQ $0, 56(SP) // errno
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2008-11-25 17:48:10 -07:00
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CALL sys·exitsyscall(SB)
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2008-07-26 15:49:21 -06:00
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RET
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2008-11-25 17:48:10 -07:00
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TEXT syscall·Syscall6(SB),7,$0
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CALL sys·entersyscall(SB)
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2008-09-16 14:42:47 -06:00
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MOVQ 16(SP), DI
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MOVQ 24(SP), SI
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MOVQ 32(SP), DX
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MOVQ 40(SP), R10
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MOVQ 48(SP), R8
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MOVQ 56(SP), R9
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MOVQ 8(SP), AX // syscall entry
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SYSCALL
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2008-11-25 17:48:10 -07:00
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CMPQ AX, $0xfffffffffffff001
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JLS ok6
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2008-09-16 14:42:47 -06:00
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MOVQ $-1, 64(SP) // r1
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MOVQ $0, 72(SP) // r2
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NEGQ AX
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MOVQ AX, 80(SP) // errno
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2008-11-25 17:48:10 -07:00
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CALL sys·exitsyscall(SB)
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2008-09-16 14:42:47 -06:00
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RET
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2008-11-25 17:48:10 -07:00
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ok6:
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2008-09-16 14:42:47 -06:00
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MOVQ AX, 64(SP) // r1
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MOVQ DX, 72(SP) // r2
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MOVQ $0, 80(SP) // errno
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2008-11-25 17:48:10 -07:00
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CALL sys·exitsyscall(SB)
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2008-09-16 14:42:47 -06:00
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RET
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