newlib-cygwin/libgloss/m68k/bdm-crt1.c

65 lines
2.0 KiB
C

/* Initialization code for coldfire boards.
*
* Copyright (c) 2006 CodeSourcery Inc
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
#include <stdlib.h>
extern const int __interrupt_vector[];
extern void __reset (void);
extern const char __data_load[] __attribute__ ((aligned (4)));
extern char __data_start[] __attribute__ ((aligned (4)));
extern char __bss_start[] __attribute__ ((aligned (4)));
extern char __end[] __attribute__ ((aligned (4)));
extern void software_init_hook (void) __attribute__ ((weak));
extern void hardware_init_hook (void) __attribute__ ((weak));
extern void __INIT_SECTION__ (void);
extern void __FINI_SECTION__ (void);
extern int main (int, char **, char **);
/* This is called from a tiny assembly stub that just initializes the
stack pointer. */
void __start1 (void)
{
unsigned ix;
if (hardware_init_hook)
hardware_init_hook ();
/* Set the VBR. */
__asm__ __volatile__ ("movec.l %0,%/vbr" :: "r" (__interrupt_vector));
/* Initialize memory */
if (__data_load != __data_start)
memcpy (__data_start, __data_load, __bss_start - __data_start);
memset (__bss_start, 0, __end - __bss_start);
if (software_init_hook)
software_init_hook ();
__INIT_SECTION__ ();
/* I'm not sure how useful it is to have a fini_section in an
embedded system. */
atexit (__FINI_SECTION__);
ix = main (0, NULL, NULL);
exit (ix);
while (1)
__reset ();
}