linux/arch/i386/kernel/asm-offsets.c
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   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 */
  29void foo(void);
  30
  31void 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}
 119
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