xref: /aosp_15_r20/system/unwinding/libunwindstack/AsmGetRegsX86.S (revision eb293b8f56ee8303637c5595cfcdeef8039e85c6)
1*eb293b8fSAndroid Build Coastguard Worker/*
2*eb293b8fSAndroid Build Coastguard Worker * Copyright (C) 2016 The Android Open Source Project
3*eb293b8fSAndroid Build Coastguard Worker * All rights reserved.
4*eb293b8fSAndroid Build Coastguard Worker *
5*eb293b8fSAndroid Build Coastguard Worker * Redistribution and use in source and binary forms, with or without
6*eb293b8fSAndroid Build Coastguard Worker * modification, are permitted provided that the following conditions
7*eb293b8fSAndroid Build Coastguard Worker * are met:
8*eb293b8fSAndroid Build Coastguard Worker *  * Redistributions of source code must retain the above copyright
9*eb293b8fSAndroid Build Coastguard Worker *    notice, this list of conditions and the following disclaimer.
10*eb293b8fSAndroid Build Coastguard Worker *  * Redistributions in binary form must reproduce the above copyright
11*eb293b8fSAndroid Build Coastguard Worker *    notice, this list of conditions and the following disclaimer in
12*eb293b8fSAndroid Build Coastguard Worker *    the documentation and/or other materials provided with the
13*eb293b8fSAndroid Build Coastguard Worker *    distribution.
14*eb293b8fSAndroid Build Coastguard Worker *
15*eb293b8fSAndroid Build Coastguard Worker * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16*eb293b8fSAndroid Build Coastguard Worker * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17*eb293b8fSAndroid Build Coastguard Worker * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18*eb293b8fSAndroid Build Coastguard Worker * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19*eb293b8fSAndroid Build Coastguard Worker * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20*eb293b8fSAndroid Build Coastguard Worker * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21*eb293b8fSAndroid Build Coastguard Worker * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22*eb293b8fSAndroid Build Coastguard Worker * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23*eb293b8fSAndroid Build Coastguard Worker * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24*eb293b8fSAndroid Build Coastguard Worker * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25*eb293b8fSAndroid Build Coastguard Worker * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26*eb293b8fSAndroid Build Coastguard Worker * SUCH DAMAGE.
27*eb293b8fSAndroid Build Coastguard Worker */
28*eb293b8fSAndroid Build Coastguard Worker
29*eb293b8fSAndroid Build Coastguard Worker  .text
30*eb293b8fSAndroid Build Coastguard Worker  .global AsmGetRegs
31*eb293b8fSAndroid Build Coastguard Worker  .balign 16
32*eb293b8fSAndroid Build Coastguard Worker  .type AsmGetRegs, @function
33*eb293b8fSAndroid Build Coastguard WorkerAsmGetRegs:
34*eb293b8fSAndroid Build Coastguard Worker  .cfi_startproc
35*eb293b8fSAndroid Build Coastguard Worker  mov 4(%esp), %eax
36*eb293b8fSAndroid Build Coastguard Worker  movl $0, (%eax)
37*eb293b8fSAndroid Build Coastguard Worker  movl %ecx, 4(%eax)
38*eb293b8fSAndroid Build Coastguard Worker  movl %edx, 8(%eax)
39*eb293b8fSAndroid Build Coastguard Worker  movl %ebx, 12(%eax)
40*eb293b8fSAndroid Build Coastguard Worker
41*eb293b8fSAndroid Build Coastguard Worker  /* ESP */
42*eb293b8fSAndroid Build Coastguard Worker  leal 4(%esp), %ecx
43*eb293b8fSAndroid Build Coastguard Worker  movl %ecx, 16(%eax)
44*eb293b8fSAndroid Build Coastguard Worker
45*eb293b8fSAndroid Build Coastguard Worker  movl %ebp, 20(%eax)
46*eb293b8fSAndroid Build Coastguard Worker  movl %esi, 24(%eax)
47*eb293b8fSAndroid Build Coastguard Worker  movl %edi, 28(%eax)
48*eb293b8fSAndroid Build Coastguard Worker
49*eb293b8fSAndroid Build Coastguard Worker  /* EIP */
50*eb293b8fSAndroid Build Coastguard Worker  movl (%esp), %ecx
51*eb293b8fSAndroid Build Coastguard Worker  movl %ecx, 32(%eax)
52*eb293b8fSAndroid Build Coastguard Worker
53*eb293b8fSAndroid Build Coastguard Worker  mov  %cs, 36(%eax)
54*eb293b8fSAndroid Build Coastguard Worker  mov  %ss, 40(%eax)
55*eb293b8fSAndroid Build Coastguard Worker  mov  %ds, 44(%eax)
56*eb293b8fSAndroid Build Coastguard Worker  mov  %es, 48(%eax)
57*eb293b8fSAndroid Build Coastguard Worker  mov  %fs, 52(%eax)
58*eb293b8fSAndroid Build Coastguard Worker  mov  %gs, 56(%eax)
59*eb293b8fSAndroid Build Coastguard Worker  ret
60*eb293b8fSAndroid Build Coastguard Worker
61*eb293b8fSAndroid Build Coastguard Worker  .cfi_endproc
62*eb293b8fSAndroid Build Coastguard Worker  .size AsmGetRegs, .-AsmGetRegs
63