| // 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. | |
| // +build mips mipsle | |
| /* | |
| * 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 O32 ABI, where $16-$23, $30, and $f20-$f31 | |
| * are callee-save, so they must be saved explicitly, along with $31 (LR). | |
| */ | |
| .globl crosscall1 | |
| .set noat | |
| crosscall1: | |
| #ifndef __mips_soft_float | |
| addiu $29, $29, -88 | |
| #else | |
| addiu $29, $29, -40 // For soft-float, no need to make room for FP registers | |
| #endif | |
| sw $31, 0($29) | |
| sw $16, 4($29) | |
| sw $17, 8($29) | |
| sw $18, 12($29) | |
| sw $19, 16($29) | |
| sw $20, 20($29) | |
| sw $21, 24($29) | |
| sw $22, 28($29) | |
| sw $23, 32($29) | |
| sw $30, 36($29) | |
| #ifndef __mips_soft_float | |
| sdc1 $f20, 40($29) | |
| sdc1 $f22, 48($29) | |
| sdc1 $f24, 56($29) | |
| sdc1 $f26, 64($29) | |
| sdc1 $f28, 72($29) | |
| sdc1 $f30, 80($29) | |
| #endif | |
| move $20, $4 // save R4 | |
| move $4, $6 | |
| jalr $5 // call setg_gcc | |
| jalr $20 // call fn | |
| lw $16, 4($29) | |
| lw $17, 8($29) | |
| lw $18, 12($29) | |
| lw $19, 16($29) | |
| lw $20, 20($29) | |
| lw $21, 24($29) | |
| lw $22, 28($29) | |
| lw $23, 32($29) | |
| lw $30, 36($29) | |
| #ifndef __mips_soft_float | |
| ldc1 $f20, 40($29) | |
| ldc1 $f22, 48($29) | |
| ldc1 $f24, 56($29) | |
| ldc1 $f26, 64($29) | |
| ldc1 $f28, 72($29) | |
| ldc1 $f30, 80($29) | |
| #endif | |
| lw $31, 0($29) | |
| #ifndef __mips_soft_float | |
| addiu $29, $29, 88 | |
| #else | |
| addiu $29, $29, 40 | |
| #endif | |
| jr $31 | |
| .set at | |
| #ifdef __ELF__ | |
| .section .note.GNU-stack,"",%progbits | |
| #endif |