arch/x86_64/kernel/asm-offsets.c

   1 /*
   2  * Generate definitions needed by assembly language modules.
   3  * This code generates raw asm output which is post-processed to extract
   4  * and format the required data.
   5  */
   6
   7 #include <linux/sched.h>
   8 #include <linux/stddef.h>
   9 #include <linux/errno.h>
  10 #include <linux/hardirq.h>
  11 #include <asm/pda.h>
  12 #include <asm/processor.h>
  13 #include <asm/segment.h>
  14 #include <asm/thread_info.h>
  15 #include <asm/ia32.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 main(void)
  23 {
  24 #define ENTRY(entry) DEFINE(tsk_ ## entry, offsetof(struct task_struct, entry))
  25         ENTRY(state);
  26         ENTRY(flags);
  27         ENTRY(thread);
  28         ENTRY(pid);
  29         BLANK();
  30 #undef ENTRY
  31 #define ENTRY(entry) DEFINE(threadinfo_ ## entry, offsetof(struct thread_info, entry))
  32         ENTRY(flags);
  33         ENTRY(addr_limit);
  34         ENTRY(preempt_count);
  35         BLANK();
  36 #undef ENTRY
  37 #define ENTRY(entry) DEFINE(pda_ ## entry, offsetof(struct x8664_pda, entry))
  38         ENTRY(kernelstack);
  39         ENTRY(oldrsp);
  40         ENTRY(pcurrent);
  41         ENTRY(irqrsp);
  42         ENTRY(irqcount);
  43         ENTRY(cpunumber);
  44         ENTRY(irqstackptr);
  45         BLANK();
  46 #undef ENTRY
  47 #ifdef CONFIG_IA32_EMULATION
  48 #define ENTRY(entry) DEFINE(IA32_SIGCONTEXT_ ## entry, offsetof(struct sigcontext_ia32, entry))
  49         ENTRY(eax);
  50         ENTRY(ebx);
  51         ENTRY(ecx);
  52         ENTRY(edx);
  53         ENTRY(esi);
  54         ENTRY(edi);
  55         ENTRY(ebp);
  56         ENTRY(esp);
  57         ENTRY(eip);
  58         BLANK();
  59 #undef ENTRY
  60         DEFINE(IA32_RT_SIGFRAME_sigcontext,
  61                offsetof (struct rt_sigframe32, uc.uc_mcontext));
  62         BLANK();
  63 #endif
  64
  65         return 0;
  66 }