arch/x86/kernel/asm-offsets_64.c

   1 /*
   2  * Generate definitions needed by assembly language modules.
   3  * This code generates raw asm output which is post-processed to extract
   4  * and format the required data.
   5  */
   6
   7 #include <linux/crypto.h>
   8 #include <linux/sched.h>
   9 #include <linux/stddef.h>
  10 #include <linux/errno.h>
  11 #include <linux/hardirq.h>
  12 #include <linux/suspend.h>
  13 #include <asm/pda.h>
  14 #include <asm/processor.h>
  15 #include <asm/segment.h>
  16 #include <asm/thread_info.h>
  17 #include <asm/ia32.h>
  18 #include <asm/bootparam.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 #define __NO_STUBS 1
  29 #undef __SYSCALL
  30 #undef _ASM_X86_64_UNISTD_H_
  31 #define __SYSCALL(nr, sym) [nr] = 1,
  32 static char syscalls[] = {
  33 #include <asm/unistd.h>
  34 };
  35
  36 int main(void)
  37 {
  38 #define ENTRY(entry) DEFINE(tsk_ ## entry, offsetof(struct task_struct, entry))
  39         ENTRY(state);
  40         ENTRY(flags);
  41         ENTRY(pid);
  42         BLANK();
  43 #undef ENTRY
  44 #define ENTRY(entry) DEFINE(threadinfo_ ## entry, offsetof(struct thread_info, entry))
  45         ENTRY(flags);
  46         ENTRY(addr_limit);
  47         ENTRY(preempt_count);
  48         ENTRY(status);
  49 #ifdef CONFIG_IA32_EMULATION
  50         ENTRY(sysenter_return);
  51 #endif
  52         BLANK();
  53 #undef ENTRY
  54 #define ENTRY(entry) DEFINE(pda_ ## entry, offsetof(struct x8664_pda, entry))
  55         ENTRY(kernelstack);
  56         ENTRY(oldrsp);
  57         ENTRY(pcurrent);
  58         ENTRY(irqcount);
  59         ENTRY(cpunumber);
  60         ENTRY(irqstackptr);
  61         ENTRY(data_offset);
  62         BLANK();
  63 #undef ENTRY
  64 #ifdef CONFIG_IA32_EMULATION
  65 #define ENTRY(entry) DEFINE(IA32_SIGCONTEXT_ ## entry, offsetof(struct sigcontext_ia32, entry))
  66         ENTRY(eax);
  67         ENTRY(ebx);
  68         ENTRY(ecx);
  69         ENTRY(edx);
  70         ENTRY(esi);
  71         ENTRY(edi);
  72         ENTRY(ebp);
  73         ENTRY(esp);
  74         ENTRY(eip);
  75         BLANK();
  76 #undef ENTRY
  77         DEFINE(IA32_RT_SIGFRAME_sigcontext,
  78                offsetof (struct rt_sigframe32, uc.uc_mcontext));
  79         BLANK();
  80 #endif
  81         DEFINE(pbe_address, offsetof(struct pbe, address));
  82         DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
  83         DEFINE(pbe_next, offsetof(struct pbe, next));
  84         BLANK();
  85 #define ENTRY(entry) DEFINE(pt_regs_ ## entry, offsetof(struct pt_regs, entry))
  86         ENTRY(bx);
  87         ENTRY(bx);
  88         ENTRY(cx);
  89         ENTRY(dx);
  90         ENTRY(sp);
  91         ENTRY(bp);
  92         ENTRY(si);
  93         ENTRY(di);
  94         ENTRY(r8);
  95         ENTRY(r9);
  96         ENTRY(r10);
  97         ENTRY(r11);
  98         ENTRY(r12);
  99         ENTRY(r13);
 100         ENTRY(r14);
 101         ENTRY(r15);
 102         ENTRY(flags);
 103         BLANK();
 104 #undef ENTRY
 105 #define ENTRY(entry) DEFINE(saved_context_ ## entry, offsetof(struct saved_context, entry))
 106         ENTRY(cr0);
 107         ENTRY(cr2);
 108         ENTRY(cr3);
 109         ENTRY(cr4);
 110         ENTRY(cr8);
 111         BLANK();
 112 #undef ENTRY
 113         DEFINE(TSS_ist, offsetof(struct tss_struct, ist));
 114         BLANK();
 115         DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
 116         BLANK();
 117         DEFINE(__NR_syscall_max, sizeof(syscalls) - 1);
 118
 119         BLANK();
 120         OFFSET(BP_scratch, boot_params, scratch);
 121         OFFSET(BP_loadflags, boot_params, hdr.loadflags);
 122         OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch);
 123         OFFSET(BP_version, boot_params, hdr.version);
 124         return 0;
 125 }