libgloss/arc/hl-stub.c

   1 /*
   2  * hl-stub.c -- provide _kill() and _getpid().
   3  *
   4  * Copyright (c) 2024 Synopsys Inc.
   5  *
   6  * The authors hereby grant permission to use, copy, modify, distribute,
   7  * and license this software and its documentation for any purpose, provided
   8  * that existing copyright notices are retained in all copies and that this
   9  * notice is included verbatim in any distributions. No written agreement,
  10  * license, or royalty fee is required for any of the authorized uses.
  11  * Modifications to this software may be copyrighted by their authors
  12  * and need not follow the licensing terms described here, provided that
  13  * the new terms are clearly indicated on the first page of each file where
  14  * they apply.
  15  *
  16  */
  17
  18 #include <string.h>
  19 #include <errno.h>
  20 #include <unistd.h>
  21 #include <sys/times.h>
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <fcntl.h>
  25
  26 #include "glue.h"
  27
  28
  29 /* If PID is equal to __MYPID, exit with sig as retcode.  */
  30 int
  31 _kill (int pid, int sig)
  32 {
  33   if (pid == __MYPID)
  34     _exit (sig);
  35
  36   errno = ENOSYS;
  37   return -1;
  38 }
  39
  40
  41 /* Return __MYPID.  */
  42 int
  43 _getpid (void)
  44 {
  45   return __MYPID;
  46 }
  47
  48 /* We do not have 64-bit compatible hostlink fstat.  */
  49 #if defined (__ARC64__)
  50 int
  51 _fstat (int fd, struct stat *st)
  52 {
  53   memset (st, 0, sizeof (*st));
  54   st->st_mode = S_IFCHR;
  55   st->st_blksize = 1024;
  56
  57   return 0;
  58 }
  59 #endif
  60
  61
  62 /* hostlink backend has only fstat(), so use fstat() in stat().  */
  63 int
  64 _stat (const char *pathname, struct stat *buf)
  65 {
  66   int fd;
  67   int ret;
  68   int saved_errno;
  69
  70   fd = open (pathname, O_RDONLY);
  71   if (fd < 0)
  72     {
  73       /* errno is set by open().  */
  74       return -1;
  75     }
  76
  77   ret = fstat (fd, buf);
  78   saved_errno = errno;
  79
  80   close (fd);
  81
  82   errno = saved_errno;
  83
  84   return ret;
  85 }
  86
  87
  88 /* No Metaware hostlink backend for this call.  */
  89 int
  90 _link (const char *oldpath __attribute__ ((unused)),
  91        const char *newpath __attribute__ ((unused)))
  92 {
  93   errno = ENOSYS;
  94   return -1;
  95 }