47 lines
1.5 KiB
ArmAsm
47 lines
1.5 KiB
ArmAsm
/*
|
|
* Copyright (c) 2018, 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)
|
|
ALIAS(__setcontext, libucontext_setcontext)
|
|
|
|
FUNC(libucontext_setcontext)
|
|
/* set all of the registers */
|
|
movq REG_OFFSET(REG_R8)(%rdi), %r8
|
|
movq REG_OFFSET(REG_R9)(%rdi), %r9
|
|
movq REG_OFFSET(REG_R10)(%rdi), %r10
|
|
movq REG_OFFSET(REG_R11)(%rdi), %r11
|
|
movq REG_OFFSET(REG_R12)(%rdi), %r12
|
|
movq REG_OFFSET(REG_R13)(%rdi), %r13
|
|
movq REG_OFFSET(REG_R14)(%rdi), %r14
|
|
movq REG_OFFSET(REG_R15)(%rdi), %r15
|
|
movq REG_OFFSET(REG_RSI)(%rdi), %rsi
|
|
movq REG_OFFSET(REG_RBP)(%rdi), %rbp
|
|
movq REG_OFFSET(REG_RBX)(%rdi), %rbx
|
|
movq REG_OFFSET(REG_RDX)(%rdi), %rdx
|
|
movq REG_OFFSET(REG_RAX)(%rdi), %rax
|
|
movq REG_OFFSET(REG_RCX)(%rdi), %rcx
|
|
movq REG_OFFSET(REG_RSP)(%rdi), %rsp
|
|
|
|
/* set the jump target by pushing it to the stack.
|
|
ret will pop the new %rip from the stack, causing us to jump there. */
|
|
pushq REG_OFFSET(REG_RIP)(%rdi)
|
|
|
|
/* finally, set %rdi correctly. */
|
|
movq REG_OFFSET(REG_RDI)(%rdi), %rdi
|
|
|
|
/* we're all done here, return 0 */
|
|
xorl %eax, %eax
|
|
ret
|
|
END(libucontext_setcontext)
|