| Torne (Richard Coles) | 0938029 | 2014-02-21 12:17:33 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 Google Inc. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are |
| 6 | * met: |
| 7 | * |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above |
| 11 | * copyright notice, this list of conditions and the following disclaimer |
| 12 | * in the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * * Neither the name of Google Inc. nor the names of its |
| 15 | * contributors may be used to endorse or promote products derived from |
| 16 | * this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 21 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 22 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 23 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 24 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | |
| 32 | /* |
| 33 | * typedef void (*PushAllRegistersCallback)(SafePointBarrier*, ThreadState*, intptr_t*); |
| 34 | * extern "C" void pushAllRegisters(SafePointBarrier*, ThreadState*, PushAllRegistersCallback) |
| 35 | */ |
| 36 | |
| 37 | .type pushAllRegisters, %function |
| 38 | .global pushAllRegisters |
| 39 | .hidden pushAllRegisters |
| Torne (Richard Coles) | d5428f3 | 2014-03-18 10:21:16 +0000 | [diff] [blame^] | 40 | #ifdef __thumb__ |
| 41 | /* In THUMB Mode jump to ARM stub via bx to ensure CPU mode switch. |
| 42 | * FIXME: This trampoline is provided to workaround bugs in |
| 43 | * the THUMB/ARM interworking that appear in the component build. |
| 44 | * When these issues are resolved this stub can be removed. |
| 45 | */ |
| 46 | .code 16 |
| 47 | .thumb_func |
| Torne (Richard Coles) | 0938029 | 2014-02-21 12:17:33 +0000 | [diff] [blame] | 48 | pushAllRegisters: |
| Torne (Richard Coles) | d5428f3 | 2014-03-18 10:21:16 +0000 | [diff] [blame^] | 49 | adr r3, pushAllRegistersARM |
| 50 | bx r3 |
| 51 | |
| 52 | .type pushAllRegistersARM, %function |
| 53 | .hidden pushAllRegistersARM |
| 54 | .code 32 |
| 55 | pushAllRegistersARM: |
| 56 | #else |
| 57 | /* ARM Mode */ |
| 58 | pushAllRegisters: |
| 59 | #endif |
| Torne (Richard Coles) | 0938029 | 2014-02-21 12:17:33 +0000 | [diff] [blame] | 60 | /* Push all callee-saved registers and save return address. */ |
| 61 | push {r4-r11, lr} |
| 62 | /* Pass the two first arguments unchanged (r0, r1) |
| 63 | * and pass the stack pointer after pushing callee-saved |
| 64 | * registers to the callback function. |
| 65 | */ |
| 66 | mov r3, r2 |
| 67 | mov r2, sp |
| 68 | blx r3 |
| 69 | /* Discard all the registers, and pop lr into pc which returns |
| 70 | * and switches mode if needed. |
| 71 | */ |
| 72 | add sp, sp, #32 |
| 73 | pop {pc} |