| // Copyright 2016 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| #include "textflag.h" |
| |
| // Called by C code generated by cmd/cgo. |
| // func crosscall2(fn func(a unsafe.Pointer, n int32, ctxt uintptr), a unsafe.Pointer, n int32, ctxt uintptr) |
| // Saves C callee-saved registers and calls fn with three arguments. |
| TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0 |
| // Start with standard C stack frame layout and linkage |
| |
| // Save R6-R15, F0, F2, F4 and F6 in the |
| // register save area of the calling function |
| STMG R6, R15, 48(R15) |
| FMOVD F0, 128(R15) |
| FMOVD F2, 136(R15) |
| FMOVD F4, 144(R15) |
| FMOVD F6, 152(R15) |
| |
| // Initialize Go ABI environment |
| XOR R0, R0 |
| BL runtime·load_g(SB) |
| |
| // Allocate 32 bytes on the stack |
| SUB $32, R15 |
| |
| MOVD R3, 8(R15) // arg1 |
| MOVW R4, 16(R15) // arg2 |
| MOVD R5, 24(R15) // arg3 |
| BL (R2) // fn(arg1, arg2, arg3) |
| |
| ADD $32, R15 |
| |
| // Restore R6-R15, F0, F2, F4 and F6 |
| LMG 48(R15), R6, R15 |
| FMOVD F0, 128(R15) |
| FMOVD F2, 136(R15) |
| FMOVD F4, 144(R15) |
| FMOVD F6, 152(R15) |
| |
| RET |
| |
