forked from ariadne/libucontext
53 lines
1.5 KiB
ArmAsm
53 lines
1.5 KiB
ArmAsm
/*
|
|
* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* This software is provided 'as is' and without any warranty, express or
|
|
* implied. In no event shall the authors be liable for any damages arising
|
|
* from the use of this software.
|
|
*/
|
|
|
|
#include "defs.h"
|
|
|
|
ALIAS(setcontext, libucontext_setcontext)
|
|
|
|
FUNC(libucontext_setcontext)
|
|
mov r4, r0
|
|
|
|
add #(REG_OFFSET(REG_PC)), r0 /* restore PR */
|
|
mov.l @r0+, r2
|
|
lds.l @r0+, pr
|
|
|
|
mov.l @r0+, r1 /* restore T-flag */
|
|
shlr r1
|
|
|
|
add #REG_SZ, r0 /* skip GBR (used for TLS) */
|
|
|
|
lds.l @r0+, mach /* load mach/macl registers */
|
|
lds.l @r0+, macl
|
|
|
|
mov r4, r0 /* bring r0 back to the top of the context */
|
|
|
|
mov.l @(REG_OFFSET(1), r0), r1 /* restore GPRs r1-15 */
|
|
mov.l @(REG_OFFSET(2), r0), r2
|
|
mov.l @(REG_OFFSET(3), r0), r3
|
|
mov.l @(REG_OFFSET(4), r0), r4
|
|
mov.l @(REG_OFFSET(5), r0), r5
|
|
mov.l @(REG_OFFSET(6), r0), r6
|
|
mov.l @(REG_OFFSET(7), r0), r7
|
|
mov.l @(REG_OFFSET(8), r0), r8
|
|
mov.l @(REG_OFFSET(9), r0), r9
|
|
mov.l @(REG_OFFSET(10), r0), r10
|
|
mov.l @(REG_OFFSET(11), r0), r11
|
|
mov.l @(REG_OFFSET(12), r0), r12
|
|
mov.l @(REG_OFFSET(13), r0), r13
|
|
mov.l @(REG_OFFSET(14), r0), r14
|
|
mov.l @(REG_OFFSET(15), r0), r15
|
|
|
|
mov.l @(REG_OFFSET(REG_PC), r0), r0
|
|
jmp @r0
|
|
END(libucontext_setcontext)
|