/**
 * The code was taken from musl libc.
 *
 * Copyright (c) 2011      Nicholas J. Kain
 * Copyright (c) 2011-2012 Rich Felker
 * Copyright (c) 2022      Alexander Monakov
 * Copyright (c) 2022      Alex Kotov
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

.global setjmp
.type setjmp, @function
setjmp:
mov   %rbx  ,   (%rdi) /* rdi is jmp_buf, move registers onto it */
mov   %rbp  ,  8(%rdi)
mov   %r12  , 16(%rdi)
mov   %r13  , 24(%rdi)
mov   %r14  , 32(%rdi)
mov   %r15  , 40(%rdi)
lea 8(%rsp) ,    %rdx  /* this is our rsp WITHOUT current ret addr */
mov   %rdx  , 48(%rdi)
mov  (%rsp) ,    %rdx  /* save return addr ptr for new rip */
mov   %rdx  , 56(%rdi)
xor   %eax  ,    %eax  /* always return 0 */
ret