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[/] [scarts/] [trunk/] [toolchain/] [scarts-newlib/] [newlib-1.17.0/] [newlib/] [libc/] [sys/] [rtems/] [crt0.c] - Rev 9
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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; } #if defined(__GNUC__) /* * stubs for libstdc++ rtems-threads support functions from gcc/gthr-rtems.h */ int rtems_gxx_once() { return -1; } int rtems_gxx_key_create() { return -1; } int rtems_gxx_key_delete() { return -1; } void *rtems_gxx_getspecific() { return 0; } int rtems_gxx_setspecific() { return -1; } void rtems_gxx_mutex_init() { } int rtems_gxx_mutex_lock() { return -1; } int rtems_gxx_mutex_trylock() { return -1; } int rtems_gxx_mutex_unlock() { return -1; } void rtems_gxx_recursive_mutex_init() { } int rtems_gxx_recursive_mutex_lock() { return -1; } int rtems_gxx_recursive_mutex_trylock() { return -1; } int rtems_gxx_recursive_mutex_unlock() { return -1; } #endif /* 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() {} /* stubs for functions required by libc/posix */ int getdents(int fd, void *dp, int count) { return -1; } struct timespec; int nanosleep(const struct timespec *req, struct timespec *rem) { return -1; } int _execve(const char *path, char * const *argv, char * const *envp) { return -1; } int _exit(int status) { return -1; } /* 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