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 <linux/suspend.h>
  12 #include <asm/pda.h>
  13 #include <asm/processor.h>
  14 #include <asm/segment.h>
  15 #include <asm/thread_info.h>
  16 #include <asm/ia32.h>
  17
  18 #define DEFINE(sym, val) \
  19         asm volatile("\n->" #sym " %0 " #val : : "i" (val))
  20
  21 #define BLANK() asm volatile("\n->" : : )
  22
  23 int main(void)
  24 {
  25 #define ENTRY(entry) DEFINE(tsk_ ## entry, offsetof(struct task_struct, entry))
  26         ENTRY(state);
  27         ENTRY(flags);
  28         ENTRY(thread);
  29         ENTRY(pid);
  30         BLANK();
  31 #undef ENTRY
  32 #define ENTRY(entry) DEFINE(threadinfo_ ## entry, offsetof(struct thread_info, entry))
  33         ENTRY(flags);
  34         ENTRY(addr_limit);
  35         ENTRY(preempt_count);
  36         ENTRY(status);
  37         BLANK();
  38 #undef ENTRY
  39 #define ENTRY(entry) DEFINE(pda_ ## entry, offsetof(struct x8664_pda, entry))
  40         ENTRY(kernelstack);
  41         ENTRY(oldrsp);
  42         ENTRY(pcurrent);
  43         ENTRY(irqcount);
  44         ENTRY(cpunumber);
  45         ENTRY(irqstackptr);
  46         ENTRY(data_offset);
  47         BLANK();
  48 #undef ENTRY
  49 #ifdef CONFIG_IA32_EMULATION
  50 #define ENTRY(entry) DEFINE(IA32_SIGCONTEXT_ ## entry, offsetof(struct sigcontext_ia32, entry))
  51         ENTRY(eax);
  52         ENTRY(ebx);
  53         ENTRY(ecx);
  54         ENTRY(edx);
  55         ENTRY(esi);
  56         ENTRY(edi);
  57         ENTRY(ebp);
  58         ENTRY(esp);
  59         ENTRY(eip);
  60         BLANK();
  61 #undef ENTRY
  62         DEFINE(IA32_RT_SIGFRAME_sigcontext,
  63                offsetof (struct rt_sigframe32, uc.uc_mcontext));
  64         BLANK();
  65 #endif
  66         DEFINE(pbe_address, offsetof(struct pbe, address));
  67         DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
  68         DEFINE(pbe_next, offsetof(struct pbe, next));
  69         BLANK();
  70         DEFINE(TSS_ist, offsetof(struct tss_struct, ist));
  71         return 0;
  72 }