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/crypto.h>
   8 #include <linux/sched.h>
   9 #include <linux/signal.h>
  10 #include <linux/personality.h>
  11 #include <linux/suspend.h>
  12 #include <asm/ucontext.h>
  13 #include "sigframe.h"
  14 #include <asm/fixmap.h>
  15 #include <asm/processor.h>
  16 #include <asm/thread_info.h>
  17 #include <asm/elf.h>
  18
  19 #define DEFINE(sym, val) \
  20         asm volatile("\n->" #sym " %0 " #val : : "i" (val))
  21
  22 #define BLANK() asm volatile("\n->" : : )
  23
  24 #define OFFSET(sym, str, mem) \
  25         DEFINE(sym, offsetof(struct str, mem));
  26
  27 void foo(void)
  28 {
  29         OFFSET(SIGCONTEXT_eax, sigcontext, eax);
  30         OFFSET(SIGCONTEXT_ebx, sigcontext, ebx);
  31         OFFSET(SIGCONTEXT_ecx, sigcontext, ecx);
  32         OFFSET(SIGCONTEXT_edx, sigcontext, edx);
  33         OFFSET(SIGCONTEXT_esi, sigcontext, esi);
  34         OFFSET(SIGCONTEXT_edi, sigcontext, edi);
  35         OFFSET(SIGCONTEXT_ebp, sigcontext, ebp);
  36         OFFSET(SIGCONTEXT_esp, sigcontext, esp);
  37         OFFSET(SIGCONTEXT_eip, sigcontext, eip);
  38         BLANK();
  39
  40         OFFSET(CPUINFO_x86, cpuinfo_x86, x86);
  41         OFFSET(CPUINFO_x86_vendor, cpuinfo_x86, x86_vendor);
  42         OFFSET(CPUINFO_x86_model, cpuinfo_x86, x86_model);
  43         OFFSET(CPUINFO_x86_mask, cpuinfo_x86, x86_mask);
  44         OFFSET(CPUINFO_hard_math, cpuinfo_x86, hard_math);
  45         OFFSET(CPUINFO_cpuid_level, cpuinfo_x86, cpuid_level);
  46         OFFSET(CPUINFO_x86_capability, cpuinfo_x86, x86_capability);
  47         OFFSET(CPUINFO_x86_vendor_id, cpuinfo_x86, x86_vendor_id);
  48         BLANK();
  49
  50         OFFSET(TI_task, thread_info, task);
  51         OFFSET(TI_exec_domain, thread_info, exec_domain);
  52         OFFSET(TI_flags, thread_info, flags);
  53         OFFSET(TI_status, thread_info, status);
  54         OFFSET(TI_cpu, thread_info, cpu);
  55         OFFSET(TI_preempt_count, thread_info, preempt_count);
  56         OFFSET(TI_addr_limit, thread_info, addr_limit);
  57         OFFSET(TI_restart_block, thread_info, restart_block);
  58         OFFSET(TI_sysenter_return, thread_info, sysenter_return);
  59         BLANK();
  60
  61         OFFSET(GDS_size, Xgt_desc_struct, size);
  62         OFFSET(GDS_address, Xgt_desc_struct, address);
  63         OFFSET(GDS_pad, Xgt_desc_struct, pad);
  64         BLANK();
  65
  66         OFFSET(PT_EBX, pt_regs, ebx);
  67         OFFSET(PT_ECX, pt_regs, ecx);
  68         OFFSET(PT_EDX, pt_regs, edx);
  69         OFFSET(PT_ESI, pt_regs, esi);
  70         OFFSET(PT_EDI, pt_regs, edi);
  71         OFFSET(PT_EBP, pt_regs, ebp);
  72         OFFSET(PT_EAX, pt_regs, eax);
  73         OFFSET(PT_DS,  pt_regs, xds);
  74         OFFSET(PT_ES,  pt_regs, xes);
  75         OFFSET(PT_GS,  pt_regs, xgs);
  76         OFFSET(PT_ORIG_EAX, pt_regs, orig_eax);
  77         OFFSET(PT_EIP, pt_regs, eip);
  78         OFFSET(PT_CS,  pt_regs, xcs);
  79         OFFSET(PT_EFLAGS, pt_regs, eflags);
  80         OFFSET(PT_OLDESP, pt_regs, esp);
  81         OFFSET(PT_OLDSS,  pt_regs, xss);
  82         BLANK();
  83
  84         OFFSET(EXEC_DOMAIN_handler, exec_domain, handler);
  85         OFFSET(RT_SIGFRAME_sigcontext, rt_sigframe, uc.uc_mcontext);
  86         BLANK();
  87
  88         OFFSET(pbe_address, pbe, address);
  89         OFFSET(pbe_orig_address, pbe, orig_address);
  90         OFFSET(pbe_next, pbe, next);
  91
  92         /* Offset from the sysenter stack to tss.esp0 */
  93         DEFINE(TSS_sysenter_esp0, offsetof(struct tss_struct, esp0) -
  94                  sizeof(struct tss_struct));
  95
  96         DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
  97         DEFINE(VDSO_PRELINK, VDSO_PRELINK);
  98
  99         OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
 100 }