40 lines
934 B
ArmAsm
40 lines
934 B
ArmAsm
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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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#include "textflag.h"
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#include "abi_amd64.h"
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// Called by C code generated by cmd/cgo.
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// func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr)
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// Saves C callee-saved registers and calls cgocallback with three arguments.
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// fn is the PC of a func(a unsafe.Pointer) function.
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// This signature is known to SWIG, so we can't change it.
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TEXT crosscall2(SB), NOSPLIT|NOFRAME, $0-0
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PUSH_REGS_HOST_TO_ABI0()
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// Make room for arguments to cgocallback.
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ADJSP $0x18
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#ifndef GOOS_windows
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MOVQ DI, 0x0(SP) // fn
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MOVQ SI, 0x8(SP) // arg
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// Skip n in DX.
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MOVQ CX, 0x10(SP) // ctxt
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#else
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MOVQ CX, 0x0(SP) // fn
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MOVQ DX, 0x8(SP) // arg
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// Skip n in R8.
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MOVQ R9, 0x10(SP) // ctxt
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#endif
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CALL runtime·cgocallback(SB)
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ADJSP $-0x18
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POP_REGS_HOST_TO_ABI0()
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RET
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