1 // Copyright 2009 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4 5 #include "textflag.h"
6 7 // Called by C code generated by cmd/cgo.
8 // func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr)
9 // Saves C callee-saved registers and calls cgocallback with three arguments.
10 // fn is the PC of a func(a unsafe.Pointer) function.
11 TEXT crosscall2(SB), NOSPLIT, $28-16
12 MOVL BP, 24(SP)
13 MOVL BX, 20(SP)
14 MOVL SI, 16(SP)
15 MOVL DI, 12(SP)
16 17 MOVL ctxt+12(FP), AX
18 MOVL AX, 8(SP)
19 MOVL a+4(FP), AX
20 MOVL AX, 4(SP)
21 MOVL fn+0(FP), AX
22 MOVL AX, 0(SP)
23 CALL runtime·cgocallback(SB)
24 25 MOVL 12(SP), DI
26 MOVL 16(SP), SI
27 MOVL 20(SP), BX
28 MOVL 24(SP), BP
29 RET
30