| // Copyright 2014 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. |
| |
| //go:build ppc64 || ppc64le |
| |
| #include "textflag.h" |
| #include "asm_ppc64x.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. |
| // The value of R2 is saved on the new stack frame, and not |
| // the caller's frame due to issue #43228. |
| TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0 |
| // Start with standard C stack frame layout and linkage |
| MOVD LR, R0 |
| MOVD R0, 16(R1) // Save LR in caller's frame |
| MOVW CR, R0 // Save CR in caller's frame |
| MOVW R0, 8(R1) |
| |
| BL saveregs2<>(SB) |
| |
| MOVDU R1, (-288-3*8-FIXED_FRAME)(R1) |
| // Save the caller's R2 |
| MOVD R2, 24(R1) |
| |
| // Initialize Go ABI environment |
| BL runtime·reginit(SB) |
| BL runtime·load_g(SB) |
| |
| #ifdef GOARCH_ppc64 |
| // ppc64 use elf ABI v1. we must get the real entry address from |
| // first slot of the function descriptor before call. |
| // Same for AIX. |
| MOVD 8(R3), R2 |
| MOVD (R3), R3 |
| #endif |
| MOVD R3, FIXED_FRAME+0(R1) // fn unsafe.Pointer |
| MOVD R4, FIXED_FRAME+8(R1) // a unsafe.Pointer |
| // Skip R5 = n uint32 |
| MOVD R6, FIXED_FRAME+16(R1) // ctxt uintptr |
| BL runtime·cgocallback(SB) |
| |
| // Restore the caller's R2 |
| MOVD 24(R1), R2 |
| ADD $(288+3*8+FIXED_FRAME), R1 |
| |
| BL restoreregs2<>(SB) |
| |
| MOVW 8(R1), R0 |
| MOVFL R0, $0xff |
| MOVD 16(R1), R0 |
| MOVD R0, LR |
| RET |
| |
| TEXT saveregs2<>(SB),NOSPLIT|NOFRAME,$0 |
| // O=-288; for R in R{14..31}; do echo "\tMOVD\t$R, $O(R1)"|sed s/R30/g/; ((O+=8)); done; for F in F{14..31}; do echo "\tFMOVD\t$F, $O(R1)"; ((O+=8)); done |
| MOVD R14, -288(R1) |
| MOVD R15, -280(R1) |
| MOVD R16, -272(R1) |
| MOVD R17, -264(R1) |
| MOVD R18, -256(R1) |
| MOVD R19, -248(R1) |
| MOVD R20, -240(R1) |
| MOVD R21, -232(R1) |
| MOVD R22, -224(R1) |
| MOVD R23, -216(R1) |
| MOVD R24, -208(R1) |
| MOVD R25, -200(R1) |
| MOVD R26, -192(R1) |
| MOVD R27, -184(R1) |
| MOVD R28, -176(R1) |
| MOVD R29, -168(R1) |
| MOVD g, -160(R1) |
| MOVD R31, -152(R1) |
| FMOVD F14, -144(R1) |
| FMOVD F15, -136(R1) |
| FMOVD F16, -128(R1) |
| FMOVD F17, -120(R1) |
| FMOVD F18, -112(R1) |
| FMOVD F19, -104(R1) |
| FMOVD F20, -96(R1) |
| FMOVD F21, -88(R1) |
| FMOVD F22, -80(R1) |
| FMOVD F23, -72(R1) |
| FMOVD F24, -64(R1) |
| FMOVD F25, -56(R1) |
| FMOVD F26, -48(R1) |
| FMOVD F27, -40(R1) |
| FMOVD F28, -32(R1) |
| FMOVD F29, -24(R1) |
| FMOVD F30, -16(R1) |
| FMOVD F31, -8(R1) |
| |
| RET |
| |
| TEXT restoreregs2<>(SB),NOSPLIT|NOFRAME,$0 |
| // O=-288; for R in R{14..31}; do echo "\tMOVD\t$O(R1), $R"|sed s/R30/g/; ((O+=8)); done; for F in F{14..31}; do echo "\tFMOVD\t$O(R1), $F"; ((O+=8)); done |
| MOVD -288(R1), R14 |
| MOVD -280(R1), R15 |
| MOVD -272(R1), R16 |
| MOVD -264(R1), R17 |
| MOVD -256(R1), R18 |
| MOVD -248(R1), R19 |
| MOVD -240(R1), R20 |
| MOVD -232(R1), R21 |
| MOVD -224(R1), R22 |
| MOVD -216(R1), R23 |
| MOVD -208(R1), R24 |
| MOVD -200(R1), R25 |
| MOVD -192(R1), R26 |
| MOVD -184(R1), R27 |
| MOVD -176(R1), R28 |
| MOVD -168(R1), R29 |
| MOVD -160(R1), g |
| MOVD -152(R1), R31 |
| FMOVD -144(R1), F14 |
| FMOVD -136(R1), F15 |
| FMOVD -128(R1), F16 |
| FMOVD -120(R1), F17 |
| FMOVD -112(R1), F18 |
| FMOVD -104(R1), F19 |
| FMOVD -96(R1), F20 |
| FMOVD -88(R1), F21 |
| FMOVD -80(R1), F22 |
| FMOVD -72(R1), F23 |
| FMOVD -64(R1), F24 |
| FMOVD -56(R1), F25 |
| FMOVD -48(R1), F26 |
| FMOVD -40(R1), F27 |
| FMOVD -32(R1), F28 |
| FMOVD -24(R1), F29 |
| FMOVD -16(R1), F30 |
| FMOVD -8(R1), F31 |
| |
| RET |
