1 // Copyright 2016 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // +build mips mipsle 6 7 /* 8 * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g) 9 * 10 * Calling into the gc tool chain, where all registers are caller save. 11 * Called from standard MIPS O32 ABI, where $16-$23, $30, and $f20-$f31 12 * are callee-save, so they must be saved explicitly, along with $31 (LR). 13 */ 14 .globl crosscall1 15 .set noat 16 crosscall1: 17 #ifndef __mips_soft_float 18 addiu $29, $29, -88 19 #else 20 addiu $29, $29, -40 // For soft-float, no need to make room for FP registers 21 #endif 22 sw $31, 0($29) 23 sw $16, 4($29) 24 sw $17, 8($29) 25 sw $18, 12($29) 26 sw $19, 16($29) 27 sw $20, 20($29) 28 sw $21, 24($29) 29 sw $22, 28($29) 30 sw $23, 32($29) 31 sw $30, 36($29) 32 33 #ifndef __mips_soft_float 34 sdc1 $f20, 40($29) 35 sdc1 $f22, 48($29) 36 sdc1 $f24, 56($29) 37 sdc1 $f26, 64($29) 38 sdc1 $f28, 72($29) 39 sdc1 $f30, 80($29) 40 #endif 41 move $20, $4 // save R4 42 move $4, $6 43 jalr $5 // call setg_gcc 44 jalr $20 // call fn 45 46 lw $16, 4($29) 47 lw $17, 8($29) 48 lw $18, 12($29) 49 lw $19, 16($29) 50 lw $20, 20($29) 51 lw $21, 24($29) 52 lw $22, 28($29) 53 lw $23, 32($29) 54 lw $30, 36($29) 55 #ifndef __mips_soft_float 56 ldc1 $f20, 40($29) 57 ldc1 $f22, 48($29) 58 ldc1 $f24, 56($29) 59 ldc1 $f26, 64($29) 60 ldc1 $f28, 72($29) 61 ldc1 $f30, 80($29) 62 #endif 63 lw $31, 0($29) 64 #ifndef __mips_soft_float 65 addiu $29, $29, 88 66 #else 67 addiu $29, $29, 40 68 #endif 69 jr $31 70 71 .set at 72 73 #ifdef __ELF__ 74 .section .note.GNU-stack,"",%progbits 75 #endif 76
