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[/] [openrisc/] [trunk/] [gnu-stable/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [d10v/] [syscalls.c] - Rev 859
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/* syscalls.c - non-trap system calls for D10V * * This file contains system calls that cannot be implemented with * a simple "trap 15" instruction. The ones that can are in trap.S. */ #include <_ansi.h> #include <sys/types.h> #include <sys/stat.h> #include <errno.h> #undef errno void _exit (int n); /* in trap.S */ extern int _write (int fd, const void *ptr, size_t len); int errno; register char *stack_ptr asm ("sp"); caddr_t _sbrk (int incr) { extern char end; /* Defined by the linker */ static char *heap_end; char *prev_heap_end; char *sp = (char *)stack_ptr; if (heap_end == 0) { heap_end = (char *)((((unsigned short) &end) + 7) & ~7); } prev_heap_end = heap_end; if (heap_end + incr > sp) { _write (2, "Heap and stack collision\n", sizeof ("Heap and stack collision\n")-1); abort (); } heap_end += incr; if ((unsigned short)heap_end > 0xbfff || (heap_end < prev_heap_end && incr > 0) || (heap_end < (char *)((((unsigned short) &end) + 7) & ~7))) { _write (2, "Too much memory was allocated\n", sizeof ("Too much memory was allocated\n")-1); abort (); } return (caddr_t) prev_heap_end; } int _fstat (int file, struct stat *st) { st->st_mode = S_IFCHR; return 0; } int _unlink () { errno = ENOSYS; return -1; } int _isatty (int fd) { return 1; } void _raise () { } /* If this library is compiled with -mint32, provide conversion functions for the system call traps. */ #if __INT__==32 extern short _read16 (short fd, void *ptr, short len); int _read (int fd, void *ptr, size_t len) { return _read16 ((short)fd, ptr, (short)len); } extern short _write16 (short fd, const void *ptr, short len); int _write (int fd, const void *ptr, size_t len) { return _write16 ((short)fd, ptr, (short)len); } extern short _lseek16 (short fd, long offset, short whence); int _lseek (int fd, off_t offset, int whence) { return _lseek16 ((short)fd, offset, (short)whence); } extern short _close16 (short fd); int _close (int fd) { return _close16 ((short)fd); } extern short _open16 (const char *name, short flags, short mode); int _open (const char *name, int flags, mode_t mode) { return _open16 (name, (short)flags, (short)mode); } extern short _creat16 (const char *name, mode_t mode); int _creat (const char *name, mode_t mode) { return _creat16 (name, mode); } extern void _exit16 (short status); void _exit (int status) { _exit16 ((short)status); } extern short _stat16 (const char *name, struct stat *stat_pkt); int _stat (const char *name, struct stat *stat_pkt) { return _stat16 (name, stat_pkt); } extern short _chmod16 (const char *name, short mode); int _chmod (const char *name, mode_t mode) { return _chmod16 (name, (short)mode); } extern short _chown16 (const char *name, short uid, short gid); int _chown (const char *name, uid_t uid, gid_t gid) { return _chown16 (name, (short)uid, (short)gid); } extern short _fork16 (void); int _fork (void) { return _fork16 (); } extern short _wait16 (short *status); int _wait (int *status) { if (status) { short status16; short ret = _wait16 (&status16); if (ret >= 0) *status = status16; return ret; } else return _wait16 ((short *)0); } extern short _execve16 (const char *filename, const char *argv [], const char *envp[]); int _execve (const char *filename, const char *argv [], const char *envp[]) { return _execve16 (filename, argv, envp); } extern short _execv16 (const char *filename, const char *argv []); int _execv (const char *filename, const char *argv []) { return _execv16 (filename, argv); } extern short _pipe16 (short fds[]); int _pipe (int fds[]) { short fds16[2]; short ret = _pipe16 (fds16); if (ret >= 0) { fds[0] = fds16[0]; fds[1] = fds16[1]; } return ret; } extern short _getpid16 (void); int _getpid (void) { return _getpid16 (); } extern short _kill16 (short pid, short sig); int _kill (int pid, int sig) { return _kill16 ((short)pid, (short)sig); } #endif
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