arch/i386/kernel/asm-offsets.c

   1 /*
   2  * Generate definitions needed by assembly language modules.
   3  * This code generates raw asm output which is post-processed
   4  * to extract and format the required data.
   5  */
   6
   7 #include <linux/sched.h>
   8 #include <linux/signal.h>
   9 #include <linux/personality.h>
  10 #include <linux/suspend.h>
  11 #include <asm/ucontext.h>
  12 #include "sigframe.h"
  13 #include <asm/fixmap.h>
  14 #include <asm/processor.h>
  15 #include <asm/thread_info.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 #define OFFSET(sym, str, mem) \
  23         DEFINE(sym, offsetof(struct str, mem));
  24
  25 void foo(void)
  26 {
  27         OFFSET(SIGCONTEXT_eax, sigcontext, eax);
  28         OFFSET(SIGCONTEXT_ebx, sigcontext, ebx);
  29         OFFSET(SIGCONTEXT_ecx, sigcontext, ecx);
  30         OFFSET(SIGCONTEXT_edx, sigcontext, edx);
  31         OFFSET(SIGCONTEXT_esi, sigcontext, esi);
  32         OFFSET(SIGCONTEXT_edi, sigcontext, edi);
  33         OFFSET(SIGCONTEXT_ebp, sigcontext, ebp);
  34         OFFSET(SIGCONTEXT_esp, sigcontext, esp);
  35         OFFSET(SIGCONTEXT_eip, sigcontext, eip);
  36         BLANK();
  37
  38         OFFSET(CPUINFO_x86, cpuinfo_x86, x86);
  39         OFFSET(CPUINFO_x86_vendor, cpuinfo_x86, x86_vendor);
  40         OFFSET(CPUINFO_x86_model, cpuinfo_x86, x86_model);
  41         OFFSET(CPUINFO_x86_mask, cpuinfo_x86, x86_mask);
  42         OFFSET(CPUINFO_hard_math, cpuinfo_x86, hard_math);
  43         OFFSET(CPUINFO_cpuid_level, cpuinfo_x86, cpuid_level);
  44         OFFSET(CPUINFO_x86_capability, cpuinfo_x86, x86_capability);
  45         OFFSET(CPUINFO_x86_vendor_id, cpuinfo_x86, x86_vendor_id);
  46         BLANK();
  47
  48         OFFSET(TI_task, thread_info, task);
  49         OFFSET(TI_exec_domain, thread_info, exec_domain);
  50         OFFSET(TI_flags, thread_info, flags);
  51         OFFSET(TI_status, thread_info, status);
  52         OFFSET(TI_cpu, thread_info, cpu);
  53         OFFSET(TI_preempt_count, thread_info, preempt_count);
  54         OFFSET(TI_addr_limit, thread_info, addr_limit);
  55         OFFSET(TI_restart_block, thread_info, restart_block);
  56         BLANK();
  57
  58         OFFSET(EXEC_DOMAIN_handler, exec_domain, handler);
  59         OFFSET(RT_SIGFRAME_sigcontext, rt_sigframe, uc.uc_mcontext);
  60         BLANK();
  61
  62         OFFSET(pbe_address, pbe, address);
  63         OFFSET(pbe_orig_address, pbe, orig_address);
  64         OFFSET(pbe_next, pbe, next);
  65
  66         /* Offset from the sysenter stack to tss.esp0 */
  67         DEFINE(TSS_sysenter_esp0, offsetof(struct tss_struct, esp0) -
  68                  sizeof(struct tss_struct));
  69
  70         DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
  71         DEFINE(VSYSCALL_BASE, __fix_to_virt(FIX_VSYSCALL));
  72 }