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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [m88kbug/] [syscalls.c] - Rev 301
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/* Operating system and traps for mvme187bug, the motorolola BUG monitor for m88k */ #include <sys/types.h> #include <sys/stat.h> #include <sys/times.h> #include <errno.h> #include "sys/systraps.h" static void writechar(int c) { register int n asm ("r2"); n = c; SYSTRAP(OUTCHR); return; } static int readchar(void) { register int n asm ("r2"); SYSTRAP(INCHR); return(n); } int read(int file, char *ptr, int len) { int todo; for (todo = len; todo; --todo) { *ptr++ = readchar(); } return(len); } int lseek(int file, int ptr, int dir) { return 0; } int write(int file, char *ptr, int len) { int todo; for (todo = len; todo; --todo) { writechar(*ptr++); } return(len); } int close(int file) { return(-1); } caddr_t sbrk(int incr) { extern char end; /* Defined by the linker */ static char *heap_end; char *prev_heap_end; if (heap_end == 0) { heap_end = &end; } prev_heap_end = heap_end; if (heap_end + incr > stack_ptr) { _write (1, "Heap and stack collision\n", 25); abort (); } heap_end += incr; return((caddr_t) prev_heap_end); } int isatty(int file) { return(1); } int fstat(int file, struct stat *st) { st->st_mode = S_IFCHR; return(0); } int stat(char *filename, struct stat *st) { st->st_mode = S_IFCHR; return(0); } int open(const char *path, int flags) { return(0); } int _exit() { SYSTRAP(RETURN); } int execve(char *name, char **argv, char **env) { errno = ENOMEM; return(-1); } int fork() { errno = EAGAIN; return(-1); } int getpid() { return(1); } int kill(int pid, int sig) { errno = EINVAL; return(-1); } int link(char *old, char *new) { errno = EMLINK; return(-1); } clock_t times(struct tms *buf) { return(-1); } int unlink(char *name) { errno = ENOENT; return(-1); } int wait(int *status) { errno = ECHILD; return(-1); } /* end of syscalls.c */
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