| // Copyright 2022 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, a unsafe.Pointer, n int32, ctxt uintptr) |
| // Saves C callee-saved registers and calls cgocallback with three arguments. |
| // fn is the PC of a func(a unsafe.Pointer) function. |
| TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0 |
| /* |
| * We still need to save all callee save register as before, and then |
| * push 3 args for fn (R4, R5, R7), skipping R6. |
| * Also note that at procedure entry in gc world, 8(R29) will be the |
| * first arg. |
| */ |
| |
| ADDV $(-8*22), R3 |
| MOVV R4, (8*1)(R3) // fn unsafe.Pointer |
| MOVV R5, (8*2)(R3) // a unsafe.Pointer |
| MOVV R7, (8*3)(R3) // ctxt uintptr |
| MOVV R23, (8*4)(R3) |
| MOVV R24, (8*5)(R3) |
| MOVV R25, (8*6)(R3) |
| MOVV R26, (8*7)(R3) |
| MOVV R27, (8*8)(R3) |
| MOVV R28, (8*9)(R3) |
| MOVV R29, (8*10)(R3) |
| MOVV R30, (8*11)(R3) |
| MOVV g, (8*12)(R3) |
| MOVV R1, (8*13)(R3) |
| MOVD F24, (8*14)(R3) |
| MOVD F25, (8*15)(R3) |
| MOVD F26, (8*16)(R3) |
| MOVD F27, (8*17)(R3) |
| MOVD F28, (8*18)(R3) |
| MOVD F29, (8*19)(R3) |
| MOVD F30, (8*20)(R3) |
| MOVD F31, (8*21)(R3) |
| |
| // Initialize Go ABI environment |
| JAL runtime·load_g(SB) |
| |
| JAL runtime·cgocallback(SB) |
| |
| MOVV (8*4)(R3), R23 |
| MOVV (8*5)(R3), R24 |
| MOVV (8*6)(R3), R25 |
| MOVV (8*7)(R3), R26 |
| MOVV (8*8)(R3), R27 |
| MOVV (8*9)(R3), R28 |
| MOVV (8*10)(R3), R29 |
| MOVV (8*11)(R3), R30 |
| MOVV (8*12)(R3), g |
| MOVV (8*13)(R3), R1 |
| MOVD (8*14)(R3), F24 |
| MOVD (8*15)(R3), F25 |
| MOVD (8*16)(R3), F26 |
| MOVD (8*17)(R3), F27 |
| MOVD (8*18)(R3), F28 |
| MOVD (8*19)(R3), F29 |
| MOVD (8*20)(R3), F30 |
| MOVD (8*21)(R3), F31 |
| ADDV $(8*22), R3 |
| |
| RET |
