/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8     -*-│
│ vi: set noet ft=asm ts=8 sw=8 fenc=utf-8                                 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ 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.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/sysv/consts/nrlinux.h"
#include "libc/macros.internal.h"
.privileged

//	Linux Signal Trampoline (HOLY CODE)
__restore_bt:
	nop
	.endfn	__restore_bt,globl,hidden
	nop	// gap so that __get_symbol(st, addr - 1) fails
	.balign	16
__restore_rt:					// @see gdb/amd64-linux-tdep.c
#ifdef __x86_64__
	mov	$__NR_linux_sigreturn,%rax	// [sic]
	syscall
#elif defined(__aarch64__)
	mov	x8,#139				// __NR_rt_sigreturn
	svc	#0
#elif defined(__powerpc64__)
	li	0,172				// __NR_rt_sigreturn
	sc
#endif /* __x86_64__ */
	.balign	16
	.endfn	__restore_rt,globl,hidden