| // 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. |
| |
| //go:build mips64 || mips64le |
| |
| .file "gcc_mips64x.S" |
| |
| /* |
| * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g) |
| * |
| * Calling into the gc tool chain, where all registers are caller save. |
| * Called from standard MIPS N64 ABI, where $16-$23, $28, $30, and $f24-$f31 |
| * are callee-save, so they must be saved explicitly, along with $31 (LR). |
| */ |
| .globl crosscall1 |
| .set noat |
| crosscall1: |
| #ifndef __mips_soft_float |
| daddiu $29, $29, -160 |
| #else |
| daddiu $29, $29, -96 // For soft-float, no need to make room for FP registers |
| #endif |
| sd $31, 0($29) |
| sd $16, 8($29) |
| sd $17, 16($29) |
| sd $18, 24($29) |
| sd $19, 32($29) |
| sd $20, 40($29) |
| sd $21, 48($29) |
| sd $22, 56($29) |
| sd $23, 64($29) |
| sd $28, 72($29) |
| sd $30, 80($29) |
| #ifndef __mips_soft_float |
| sdc1 $f24, 88($29) |
| sdc1 $f25, 96($29) |
| sdc1 $f26, 104($29) |
| sdc1 $f27, 112($29) |
| sdc1 $f28, 120($29) |
| sdc1 $f29, 128($29) |
| sdc1 $f30, 136($29) |
| sdc1 $f31, 144($29) |
| #endif |
| |
| // prepare SB register = pc & 0xffffffff00000000 |
| bal 1f |
| 1: |
| dsrl $28, $31, 32 |
| dsll $28, $28, 32 |
| |
| move $20, $4 // save R4 |
| move $1, $6 |
| jalr $5 // call setg_gcc (clobbers R4) |
| jalr $20 // call fn |
| |
| ld $16, 8($29) |
| ld $17, 16($29) |
| ld $18, 24($29) |
| ld $19, 32($29) |
| ld $20, 40($29) |
| ld $21, 48($29) |
| ld $22, 56($29) |
| ld $23, 64($29) |
| ld $28, 72($29) |
| ld $30, 80($29) |
| #ifndef __mips_soft_float |
| ldc1 $f24, 88($29) |
| ldc1 $f25, 96($29) |
| ldc1 $f26, 104($29) |
| ldc1 $f27, 112($29) |
| ldc1 $f28, 120($29) |
| ldc1 $f29, 128($29) |
| ldc1 $f30, 136($29) |
| ldc1 $f31, 144($29) |
| #endif |
| ld $31, 0($29) |
| #ifndef __mips_soft_float |
| daddiu $29, $29, 160 |
| #else |
| daddiu $29, $29, 96 |
| #endif |
| jr $31 |
| |
| .set at |
| |
| #ifdef __ELF__ |
| .section .note.GNU-stack,"",%progbits |
| #endif |
