| // Copyright 2009 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,$0 |
| #ifndef GOOS_windows |
| SUBQ $0x58, SP /* keeps stack pointer 32-byte aligned */ |
| #else |
| SUBQ $0x118, SP /* also need to save xmm6 - xmm15 */ |
| #endif |
| MOVQ BX, 0x18(SP) |
| MOVQ BP, 0x20(SP) |
| MOVQ R12, 0x28(SP) |
| MOVQ R13, 0x30(SP) |
| MOVQ R14, 0x38(SP) |
| MOVQ R15, 0x40(SP) |
| |
| #ifdef GOOS_windows |
| // Win64 save RBX, RBP, RDI, RSI, RSP, R12, R13, R14, R15 and XMM6 -- XMM15. |
| MOVQ DI, 0x48(SP) |
| MOVQ SI, 0x50(SP) |
| MOVUPS X6, 0x60(SP) |
| MOVUPS X7, 0x70(SP) |
| MOVUPS X8, 0x80(SP) |
| MOVUPS X9, 0x90(SP) |
| MOVUPS X10, 0xa0(SP) |
| MOVUPS X11, 0xb0(SP) |
| MOVUPS X12, 0xc0(SP) |
| MOVUPS X13, 0xd0(SP) |
| MOVUPS X14, 0xe0(SP) |
| MOVUPS X15, 0xf0(SP) |
| |
| MOVQ DX, 0x0(SP) /* arg */ |
| MOVQ R8, 0x8(SP) /* argsize (includes padding) */ |
| MOVQ R9, 0x10(SP) /* ctxt */ |
| |
| CALL CX /* fn */ |
| |
| MOVQ 0x48(SP), DI |
| MOVQ 0x50(SP), SI |
| MOVUPS 0x60(SP), X6 |
| MOVUPS 0x70(SP), X7 |
| MOVUPS 0x80(SP), X8 |
| MOVUPS 0x90(SP), X9 |
| MOVUPS 0xa0(SP), X10 |
| MOVUPS 0xb0(SP), X11 |
| MOVUPS 0xc0(SP), X12 |
| MOVUPS 0xd0(SP), X13 |
| MOVUPS 0xe0(SP), X14 |
| MOVUPS 0xf0(SP), X15 |
| #else |
| MOVQ SI, 0x0(SP) /* arg */ |
| MOVQ DX, 0x8(SP) /* argsize (includes padding) */ |
| MOVQ CX, 0x10(SP) /* ctxt */ |
| |
| CALL DI /* fn */ |
| #endif |
| |
| MOVQ 0x18(SP), BX |
| MOVQ 0x20(SP), BP |
| MOVQ 0x28(SP), R12 |
| MOVQ 0x30(SP), R13 |
| MOVQ 0x38(SP), R14 |
| MOVQ 0x40(SP), R15 |
| |
| #ifndef GOOS_windows |
| ADDQ $0x58, SP |
| #else |
| ADDQ $0x118, SP |
| #endif |
| RET |
