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/pgtable.h>
  15 #include <asm/fixmap.h>
  16 #include <asm/processor.h>
  17 #include <asm/thread_info.h>
  18 #include <asm/elf.h>
  19
  20 #define DEFINE(sym, val) \
  21         asm volatile("\n->" #sym " %0 " #val : : "i" (val))
  22
  23 #define BLANK() asm volatile("\n->" : : )
  24
  25 #define OFFSET(sym, str, mem) \
  26         DEFINE(sym, offsetof(struct str, mem));
  27
  28 /* workaround for a warning with -Wmissing-prototypes */
  29 void foo(void);
  30
  31 void foo(void)
  32 {
  33         OFFSET(SIGCONTEXT_eax, sigcontext, eax);
  34         OFFSET(SIGCONTEXT_ebx, sigcontext, ebx);
  35         OFFSET(SIGCONTEXT_ecx, sigcontext, ecx);
  36         OFFSET(SIGCONTEXT_edx, sigcontext, edx);
  37         OFFSET(SIGCONTEXT_esi, sigcontext, esi);
  38         OFFSET(SIGCONTEXT_edi, sigcontext, edi);
  39         OFFSET(SIGCONTEXT_ebp, sigcontext, ebp);
  40         OFFSET(SIGCONTEXT_esp, sigcontext, esp);
  41         OFFSET(SIGCONTEXT_eip, sigcontext, eip);
  42         BLANK();
  43
  44         OFFSET(CPUINFO_x86, cpuinfo_x86, x86);
  45         OFFSET(CPUINFO_x86_vendor, cpuinfo_x86, x86_vendor);
  46         OFFSET(CPUINFO_x86_model, cpuinfo_x86, x86_model);
  47         OFFSET(CPUINFO_x86_mask, cpuinfo_x86, x86_mask);
  48         OFFSET(CPUINFO_hard_math, cpuinfo_x86, hard_math);
  49         OFFSET(CPUINFO_cpuid_level, cpuinfo_x86, cpuid_level);
  50         OFFSET(CPUINFO_x86_capability, cpuinfo_x86, x86_capability);
  51         OFFSET(CPUINFO_x86_vendor_id, cpuinfo_x86, x86_vendor_id);
  52         BLANK();
  53
  54         OFFSET(TI_task, thread_info, task);
  55         OFFSET(TI_exec_domain, thread_info, exec_domain);
  56         OFFSET(TI_flags, thread_info, flags);
  57         OFFSET(TI_status, thread_info, status);
  58         OFFSET(TI_preempt_count, thread_info, preempt_count);
  59         OFFSET(TI_addr_limit, thread_info, addr_limit);
  60         OFFSET(TI_restart_block, thread_info, restart_block);
  61         OFFSET(TI_sysenter_return, thread_info, sysenter_return);
  62         BLANK();
  63
  64         OFFSET(GDS_size, Xgt_desc_struct, size);
  65         OFFSET(GDS_address, Xgt_desc_struct, address);
  66         OFFSET(GDS_pad, Xgt_desc_struct, pad);
  67         BLANK();
  68
  69         OFFSET(PT_EBX, pt_regs, ebx);
  70         OFFSET(PT_ECX, pt_regs, ecx);
  71         OFFSET(PT_EDX, pt_regs, edx);
  72         OFFSET(PT_ESI, pt_regs, esi);
  73         OFFSET(PT_EDI, pt_regs, edi);
  74         OFFSET(PT_EBP, pt_regs, ebp);
  75         OFFSET(PT_EAX, pt_regs, eax);
  76         OFFSET(PT_DS,  pt_regs, xds);
  77         OFFSET(PT_ES,  pt_regs, xes);
  78         OFFSET(PT_FS,  pt_regs, xfs);
  79         OFFSET(PT_ORIG_EAX, pt_regs, orig_eax);
  80         OFFSET(PT_EIP, pt_regs, eip);
  81         OFFSET(PT_CS,  pt_regs, xcs);
  82         OFFSET(PT_EFLAGS, pt_regs, eflags);
  83         OFFSET(PT_OLDESP, pt_regs, esp);
  84         OFFSET(PT_OLDSS,  pt_regs, xss);
  85         BLANK();
  86
  87         OFFSET(EXEC_DOMAIN_handler, exec_domain, handler);
  88         OFFSET(RT_SIGFRAME_sigcontext, rt_sigframe, uc.uc_mcontext);
  89         BLANK();
  90
  91         OFFSET(pbe_address, pbe, address);
  92         OFFSET(pbe_orig_address, pbe, orig_address);
  93         OFFSET(pbe_next, pbe, next);
  94
  95         /* Offset from the sysenter stack to tss.esp0 */
  96         DEFINE(TSS_sysenter_esp0, offsetof(struct tss_struct, x86_tss.esp0) -
  97                  sizeof(struct tss_struct));
  98
  99         DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
 100         DEFINE(PAGE_SHIFT_asm, PAGE_SHIFT);
 101         DEFINE(PTRS_PER_PTE, PTRS_PER_PTE);
 102         DEFINE(PTRS_PER_PMD, PTRS_PER_PMD);
 103         DEFINE(PTRS_PER_PGD, PTRS_PER_PGD);
 104
 105         DEFINE(VDSO_PRELINK_asm, VDSO_PRELINK);
 106
 107         OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
 108
 109 #ifdef CONFIG_PARAVIRT
 110         BLANK();
 111         OFFSET(PARAVIRT_enabled, paravirt_ops, paravirt_enabled);
 112         OFFSET(PARAVIRT_irq_disable, paravirt_ops, irq_disable);
 113         OFFSET(PARAVIRT_irq_enable, paravirt_ops, irq_enable);
 114         OFFSET(PARAVIRT_irq_enable_sysexit, paravirt_ops, irq_enable_sysexit);
 115         OFFSET(PARAVIRT_iret, paravirt_ops, iret);
 116         OFFSET(PARAVIRT_read_cr0, paravirt_ops, read_cr0);
 117 #endif
 118 }