newlib/libgloss/arm/linux-crt0.c

43 lines
910 B
C

/** Linux startup code for the ARM processor.
* Written by Shaun Jackman <sjackman@gmail.com>.
* Copyright 2006 Pathway Connectivity
*
* Permission to use, copy, modify, and distribute this software
* is freely granted, provided that this notice is preserved.
*/
#include <stdlib.h>
#include <unistd.h>
#include "arm.h"
static int _main(int argc, char *argv[]) __attribute__((noreturn));
#if __thumb__ && !defined(PREFER_THUMB)
asm("\n"
".code 32\n"
".global _start\n"
".type _start, %function\n"
"_start:\n"
"\tldr r0, .LC0\n"
"\tbx r0\n"
".LC0:\n"
"\t.word _start_thumb\n"
".size _start, .-_start\n");
__attribute__((naked, used))
static void _start_thumb(void)
#else
__attribute__((naked))
void _start(void)
#endif
{
register int *sp asm("sp");
_main(*sp, (char **)(sp + 1));
}
static int _main(int argc, char *argv[])
{
environ = argv + argc + 1;
exit(main(argc, argv, environ));
}