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
40pushAllRegisters:
41        // Reserve space for callee-saved registers, return address,
42        // as well as for the callee arguments.
43        addiu $sp,$sp,-56
44        // Save the callee-saved registers and the return address.
45        sw $s0,16($sp)
46        sw $s1,20($sp)
47        sw $s2,24($sp)
48        sw $s3,28($sp)
49        sw $s4,32($sp)
50        sw $s5,36($sp)
51        sw $s6,40($sp)
52        sw $s7,44($sp)
53        sw $ra,48($sp)
54        // Pass the two first arguments untouched in a0 and a1 and the
55        // stack pointer to the callback.
56        move $t9,$a2
57        move $a2,$sp
58        jal $t9
59        // Restore return address, adjust stack and return. No
60        // callee-saved register was changed so we do not have to
61        // restore callee-saved registers.
62        lw $ra,48($sp)
63        addiu $sp,$sp,56
64        jr $ra
65