arch/um/sys-ppc/miscthings.c

   1 #include <linux/threads.h>
   2 #include <linux/stddef.h>  // for NULL
   3 #include <linux/elf.h>  // for AT_NULL
   4
   5 /* The following function nicked from arch/ppc/kernel/process.c and
   6  * adapted slightly */
   7 /*
   8  * XXX ld.so expects the auxiliary table to start on
   9  * a 16-byte boundary, so we have to find it and
  10  * move it up. :-(
  11  */
  12 void shove_aux_table(unsigned long sp)
  13 {
  14         int argc;
  15         char *p;
  16         unsigned long e;
  17         unsigned long aux_start, offset;
  18
  19         argc = *(int *)sp;
  20         sp += sizeof(int) + (argc + 1) * sizeof(char *);
  21         /* skip over the environment pointers */
  22         do {
  23                 p = *(char **)sp;
  24                 sp += sizeof(char *);
  25         } while (p != NULL);
  26         aux_start = sp;
  27         /* skip to the end of the auxiliary table */
  28         do {
  29                 e = *(unsigned long *)sp;
  30                 sp += 2 * sizeof(unsigned long);
  31         } while (e != AT_NULL);
  32         offset = ((aux_start + 15) & ~15) - aux_start;
  33         if (offset != 0) {
  34                 do {
  35                         sp -= sizeof(unsigned long);
  36                         e = *(unsigned long *)sp;
  37                         *(unsigned long *)(sp + offset) = e;
  38                 } while (sp > aux_start);
  39         }
  40 }
  41 /* END stuff taken from arch/ppc/kernel/process.c */
  42