source: trunk/libs/newlib/src/libgloss/arm/linux-crt0.c @ 532

Last change on this file since 532 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 910 bytes
Line 
1/** Linux startup code for the ARM processor.
2 * Written by Shaun Jackman <sjackman@gmail.com>.
3 * Copyright 2006 Pathway Connectivity
4 *
5 * Permission to use, copy, modify, and distribute this software
6 * is freely granted, provided that this notice is preserved.
7 */
8
9#include <stdlib.h>
10#include <unistd.h>
11#include "arm.h"
12
13static int _main(int argc, char *argv[]) __attribute__((noreturn));
14
15#if __thumb__ && !defined(PREFER_THUMB)
16asm("\n"
17        ".code 32\n"
18        ".global _start\n"
19        ".type _start, %function\n"
20        "_start:\n"
21        "\tldr r0, .LC0\n"
22        "\tbx r0\n"
23        ".LC0:\n"
24        "\t.word _start_thumb\n"
25        ".size _start, .-_start\n");
26
27__attribute__((naked, used))
28static void _start_thumb(void)
29#else
30__attribute__((naked))
31void _start(void)
32#endif
33{
34        register int *sp asm("sp");
35        _main(*sp, (char **)(sp + 1));
36}
37
38static int _main(int argc, char *argv[])
39{
40        environ = argv + argc + 1;
41        exit(main(argc, argv, environ));
42}
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