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 <asm/ucontext.h>
  11 #include "sigframe.h"
  12 #include <asm/fixmap.h>
  13 #include <asm/processor.h>
  14 #include <asm/thread_info.h>
  15
  16 #define DEFINE(sym, val) \
  17         asm volatile("\n->" #sym " %0 " #val : : "i" (val))
  18
  19 #define BLANK() asm volatile("\n->" : : )
  20
  21 #define OFFSET(sym, str, mem) \
  22         DEFINE(sym, offsetof(struct str, mem));
  23
  24 void foo(void)
  25 {
  26         OFFSET(SIGCONTEXT_eax, sigcontext, eax);
  27         OFFSET(SIGCONTEXT_ebx, sigcontext, ebx);
  28         OFFSET(SIGCONTEXT_ecx, sigcontext, ecx);
  29         OFFSET(SIGCONTEXT_edx, sigcontext, edx);
  30         OFFSET(SIGCONTEXT_esi, sigcontext, esi);
  31         OFFSET(SIGCONTEXT_edi, sigcontext, edi);
  32         OFFSET(SIGCONTEXT_ebp, sigcontext, ebp);
  33         OFFSET(SIGCONTEXT_esp, sigcontext, esp);
  34         OFFSET(SIGCONTEXT_eip, sigcontext, eip);
  35         BLANK();
  36
  37         OFFSET(CPUINFO_x86, cpuinfo_x86, x86);
  38         OFFSET(CPUINFO_x86_vendor, cpuinfo_x86, x86_vendor);
  39         OFFSET(CPUINFO_x86_model, cpuinfo_x86, x86_model);
  40         OFFSET(CPUINFO_x86_mask, cpuinfo_x86, x86_mask);
  41         OFFSET(CPUINFO_hard_math, cpuinfo_x86, hard_math);
  42         OFFSET(CPUINFO_cpuid_level, cpuinfo_x86, cpuid_level);
  43         OFFSET(CPUINFO_x86_capability, cpuinfo_x86, x86_capability);
  44         OFFSET(CPUINFO_x86_vendor_id, cpuinfo_x86, x86_vendor_id);
  45         BLANK();
  46
  47         OFFSET(TI_task, thread_info, task);
  48         OFFSET(TI_exec_domain, thread_info, exec_domain);
  49         OFFSET(TI_flags, thread_info, flags);
  50         OFFSET(TI_status, thread_info, status);
  51         OFFSET(TI_cpu, thread_info, cpu);
  52         OFFSET(TI_preempt_count, thread_info, preempt_count);
  53         OFFSET(TI_addr_limit, thread_info, addr_limit);
  54         OFFSET(TI_restart_block, thread_info, restart_block);
  55         BLANK();
  56
  57         OFFSET(EXEC_DOMAIN_handler, exec_domain, handler);
  58         OFFSET(RT_SIGFRAME_sigcontext, rt_sigframe, uc.uc_mcontext);
  59
  60         /* Offset from the sysenter stack to tss.esp0 */
  61         DEFINE(TSS_sysenter_esp0, offsetof(struct tss_struct, esp0) -
  62                  sizeof(struct tss_struct));
  63
  64         DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
  65         DEFINE(VSYSCALL_BASE, __fix_to_virt(FIX_VSYSCALL));
  66 }