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/*
* RTEMS Fake crt0
*
* Each RTEMS BSP provides its own crt0 and linker script. Unfortunately
* this means that crt0 and the linker script are not available as
* each tool is configured. Without a crt0 and linker script, some
* targets do not successfully link "conftest.c" during the configuration
* process. So this fake crt0.c provides all the symbols required to
* successfully link a program. The resulting program will not run
* but this is enough to satisfy the autoconf macro AC_PROG_CC.
*/
#include <reent.h>
void rtems_provides_crt0( void ) {} /* dummy symbol so file always has one */
/* RTEMS provides some of its own routines including a Malloc family */
void *malloc() { return 0; }
void *realloc() { return 0; }
void free() { ; }
void abort() { ; }
int raise() { return -1; }
void rtems_gxx_mutex_init() { }
int rtems_gxx_mutex_lock() { return -1; }
int rtems_gxx_mutex_unlock() { return -1; }
int rtems_gxx_once() { return -1; }
/* stubs for functions from reent.h */
int _close_r (struct _reent *r, int fd) { return -1; }
#if NOT_USED_BY_RTEMS
int _execve_r (struct _reent *r, char *, char **, char **) { return -1; }
#endif
int _fcntl_r ( struct _reent *ptr, int fd, int cmd, int arg ) { return -1;}
#if NOT_USED_BY_RTEMS
int _fork_r (struct _reent *r) { return -1; }
#endif
int _fstat_r (struct _reent *r, int fd, struct stat *buf) { return -1; }
int _getpid_r (struct _reent *r) { return -1; }
int _kill_r ( struct _reent *r, int pid, int sig ) { return -1; }
int _link_r ( struct _reent *ptr, const char *existing, const char *new) { return -1; }
_off_t _lseek_r ( struct _reent *ptr, int fd, _off_t offset, int whence ) { return -1; }
int _open_r (struct _reent *r, const char *buf, int flags, int mode) { return -1; }
_ssize_t _read_r (struct _reent *r, int fd, void *buf, size_t nbytes) { return -1; }
#if NOT_USED_BY_RTEMS
void *_sbrk_r (struct _reent *r, ptrdiff_t) { return -1; }
#endif
int _stat_r (struct _reent *r, const char *path, struct stat *buf) { return -1; }
_CLOCK_T_ _times_r (struct _reent *r, struct tms *ptms) { return -1; }
int _unlink_r (struct _reent *r, const char *path) { return -1; }
#if NOT_USED_BY_RTEMS
int _wait_r (struct _reent *r, int *) { return -1; }
#endif
_ssize_t _write_r (struct _reent *r, int fd, const void *buf, size_t nbytes) { return -1; }
int isatty( int fd ) { return -1; }
_realloc_r() {}
_calloc_r() {}
_malloc_r() {}
_free_r() {}
/* gcc can implicitly generate references to these */
/* strcmp() {} */
/* strcpy() {} */
/* strlen() {} */
/* memcmp() {} */
/* memcpy() {} */
/* memset() {} */
/* The PowerPC expects certain symbols to be defined in the linker script. */
#if defined(__PPC__)
int __SDATA_START__; int __SDATA2_START__;
int __GOT_START__; int __GOT_END__;
int __GOT2_START__; int __GOT2_END__;
int __SBSS_END__; int __SBSS2_END__;
int __FIXUP_START__; int __FIXUP_END__;
int __EXCEPT_START__; int __EXCEPT_END__;
int __init; int __fini;
int __CTOR_LIST__; int __CTOR_END__;
int __DTOR_LIST__; int __DTOR_END__;
#endif
/* The SH expects certain symbols to be defined in the linker script. */
#if defined(__sh__)
int __EH_FRAME_BEGIN__;
#endif
/* The hppa expects this to be defined in the real crt0.s.
* Also for some reason, the hppa1.1 does not find atexit()
* during the AC_PROG_CC tests.
*/
#if defined(__hppa__)
/*
asm ( ".subspa \$GLOBAL\$,QUAD=1,ALIGN=8,ACCESS=0x1f,SORT=40");
asm ( ".export \$global\$" );
asm ( "\$global\$:");
*/
asm (".text");
asm (".global");
asm (".EXPORT $$dyncall,ENTRY");
asm ("$$dyncall:");
int atexit(void (*function)(void)) { return 0; }
#endif
/*
* The AMD a29k generates code expecting the following.
*/
#if defined(_AM29000) || defined(_AM29K)
asm (".global V_SPILL, V_FILL" );
asm (".global V_EPI_OS, V_BSD_OS" );
asm (".equ V_SPILL, 64" );
asm (".equ V_FILL, 65" );
asm (".equ V_BSD_OS, 66" );
asm (".equ V_EPI_OS, 69" );
#endif
#if defined(__AVR__)
/*
* Initial stack pointer address "__stack"
* hard coded into GCC instead of providing it through ldscripts
*/
const char* __stack ;
#endif
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