| OLD | NEW |
| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 /* | 5 /* |
| 6 * typedef void (*PushAllRegistersCallback)(SafePointBarrier*, ThreadState*, int
ptr_t*); | 6 * typedef void (*PushAllRegistersCallback)(SafePointBarrier*, ThreadState*, int
ptr_t*); |
| 7 * extern "C" void pushAllRegisters(SafePointBarrier*, ThreadState*, PushAllRegi
stersCallback) | 7 * extern "C" void PushAllRegisters(SafePointBarrier*, ThreadState*, PushAllRegi
stersCallback) |
| 8 */ | 8 */ |
| 9 | 9 |
| 10 .type pushAllRegisters, %function | 10 .type PushAllRegisters, %function |
| 11 .global pushAllRegisters | 11 .global PushAllRegisters |
| 12 .hidden pushAllRegisters | 12 .hidden PushAllRegisters |
| 13 pushAllRegisters: | 13 PushAllRegisters: |
| 14 // Push all callee-saves registers to get them | 14 // Push all callee-saves registers to get them |
| 15 // on the stack for conservative stack scanning. | 15 // on the stack for conservative stack scanning. |
| 16 // Reserve space for callee-saved registers and return address. | 16 // Reserve space for callee-saved registers and return address. |
| 17 daddiu $sp,$sp,-80 | 17 daddiu $sp,$sp,-80 |
| 18 // Save the callee-saved registers and the return address. | 18 // Save the callee-saved registers and the return address. |
| 19 sd $s0,0($sp) | 19 sd $s0,0($sp) |
| 20 sd $s1,8($sp) | 20 sd $s1,8($sp) |
| 21 sd $s2,16($sp) | 21 sd $s2,16($sp) |
| 22 sd $s3,24($sp) | 22 sd $s3,24($sp) |
| 23 sd $s4,32($sp) | 23 sd $s4,32($sp) |
| 24 sd $s5,40($sp) | 24 sd $s5,40($sp) |
| 25 sd $s6,48($sp) | 25 sd $s6,48($sp) |
| 26 sd $s7,56($sp) | 26 sd $s7,56($sp) |
| 27 sd $ra,64($sp) | 27 sd $ra,64($sp) |
| 28 // Note: the callee-saved floating point registers do not need to be | 28 // Note: the callee-saved floating point registers do not need to be |
| 29 // copied to the stack, because fp registers never hold heap pointers | 29 // copied to the stack, because fp registers never hold heap pointers |
| 30 // and so do not need to be kept visible to the garbage collector. | 30 // and so do not need to be kept visible to the garbage collector. |
| 31 // Pass the two first arguments untouched in a0 and a1 and the | 31 // Pass the two first arguments untouched in a0 and a1 and the |
| 32 // stack pointer to the callback. | 32 // stack pointer to the callback. |
| 33 move $t9,$a2 | 33 move $t9,$a2 |
| 34 move $a2,$sp | 34 move $a2,$sp |
| 35 jalr $t9 | 35 jalr $t9 |
| 36 // Restore return address, adjust stack and return. | 36 // Restore return address, adjust stack and return. |
| 37 // Note: the copied registers do not need to be reloaded here, | 37 // Note: the copied registers do not need to be reloaded here, |
| 38 // because they were preserved by the called routine. | 38 // because they were preserved by the called routine. |
| 39 ld $ra,64($sp) | 39 ld $ra,64($sp) |
| 40 daddiu $sp,$sp,80 | 40 daddiu $sp,$sp,80 |
| 41 jr $ra | 41 jr $ra |
| OLD | NEW |