arch/sparc/kernel/asm-offsets.c

   1 /*
   2  * This program is used to generate definitions needed by
   3  * assembly language modules.
   4  *
   5  * We use the technique used in the OSF Mach kernel code:
   6  * generate asm statements containing #defines,
   7  * compile this file to assembler, and then extract the
   8  * #defines from the assembly-language output.
   9  *
  10  * On sparc, thread_info data is static and TI_XXX offsets are computed by hand.
  11  */
  12
  13 #include <linux/config.h>
  14 #include <linux/sched.h>
  15 // #include <linux/mm.h>
  16
  17 #define DEFINE(sym, val) \
  18         asm volatile("\n->" #sym " %0 " #val : : "i" (val))
  19
  20 #define BLANK() asm volatile("\n->" : : )
  21
  22 int foo(void)
  23 {
  24         DEFINE(AOFF_task_thread, offsetof(struct task_struct, thread));
  25         BLANK();
  26         /* XXX This is the stuff for sclow.S, kill it. */
  27         DEFINE(AOFF_task_pid, offsetof(struct task_struct, pid));
  28         DEFINE(AOFF_task_uid, offsetof(struct task_struct, uid));
  29         DEFINE(AOFF_task_gid, offsetof(struct task_struct, gid));
  30         DEFINE(AOFF_task_euid, offsetof(struct task_struct, euid));
  31         DEFINE(AOFF_task_egid, offsetof(struct task_struct, egid));
  32         /* DEFINE(THREAD_INFO, offsetof(struct task_struct, thread_info)); */
  33         DEFINE(ASIZ_task_uid,   sizeof(current->uid));
  34         DEFINE(ASIZ_task_gid,   sizeof(current->gid));
  35         DEFINE(ASIZ_task_euid,  sizeof(current->euid));
  36         DEFINE(ASIZ_task_egid,  sizeof(current->egid));
  37         BLANK();
  38         DEFINE(AOFF_thread_fork_kpsr,
  39                         offsetof(struct thread_struct, fork_kpsr));
  40         BLANK();
  41         DEFINE(AOFF_mm_context, offsetof(struct mm_struct, context));
  42
  43         /* DEFINE(NUM_USER_SEGMENTS, TASK_SIZE>>28); */
  44         return 0;
  45 }