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asm-offsets_64.c

/*
 * Generate definitions needed by assembly language modules.
 * This code generates raw asm output which is post-processed to extract
 * and format the required data.
 */

#include <linux/crypto.h>
#include <linux/sched.h> 
#include <linux/stddef.h>
#include <linux/errno.h> 
#include <linux/hardirq.h>
#include <linux/suspend.h>
#include <asm/pda.h>
#include <asm/processor.h>
#include <asm/segment.h>
#include <asm/thread_info.h>
#include <asm/ia32.h>
#include <asm/bootparam.h>

#define DEFINE(sym, val) \
        asm volatile("\n->" #sym " %0 " #val : : "i" (val))

#define BLANK() asm volatile("\n->" : : )

#define OFFSET(sym, str, mem) \
      DEFINE(sym, offsetof(struct str, mem))

#define __NO_STUBS 1
#undef __SYSCALL
#undef _ASM_X86_64_UNISTD_H_
#define __SYSCALL(nr, sym) [nr] = 1,
static char syscalls[] = {
#include <asm/unistd.h>
};

int main(void)
{
#define ENTRY(entry) DEFINE(tsk_ ## entry, offsetof(struct task_struct, entry))
      ENTRY(state);
      ENTRY(flags); 
      ENTRY(thread); 
      ENTRY(pid);
      BLANK();
#undef ENTRY
#define ENTRY(entry) DEFINE(threadinfo_ ## entry, offsetof(struct thread_info, entry))
      ENTRY(flags);
      ENTRY(addr_limit);
      ENTRY(preempt_count);
      ENTRY(status);
      BLANK();
#undef ENTRY
#define ENTRY(entry) DEFINE(pda_ ## entry, offsetof(struct x8664_pda, entry))
      ENTRY(kernelstack); 
      ENTRY(oldrsp); 
      ENTRY(pcurrent); 
      ENTRY(irqcount);
      ENTRY(cpunumber);
      ENTRY(irqstackptr);
      ENTRY(data_offset);
      BLANK();
#undef ENTRY
#ifdef CONFIG_IA32_EMULATION
#define ENTRY(entry) DEFINE(IA32_SIGCONTEXT_ ## entry, offsetof(struct sigcontext_ia32, entry))
      ENTRY(eax);
      ENTRY(ebx);
      ENTRY(ecx);
      ENTRY(edx);
      ENTRY(esi);
      ENTRY(edi);
      ENTRY(ebp);
      ENTRY(esp);
      ENTRY(eip);
      BLANK();
#undef ENTRY
      DEFINE(IA32_RT_SIGFRAME_sigcontext,
             offsetof (struct rt_sigframe32, uc.uc_mcontext));
      BLANK();
#endif
      DEFINE(pbe_address, offsetof(struct pbe, address));
      DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
      DEFINE(pbe_next, offsetof(struct pbe, next));
      BLANK();
#define ENTRY(entry) DEFINE(pt_regs_ ## entry, offsetof(struct pt_regs, entry))
      ENTRY(rbx);
      ENTRY(rbx);
      ENTRY(rcx);
      ENTRY(rdx);
      ENTRY(rsp);
      ENTRY(rbp);
      ENTRY(rsi);
      ENTRY(rdi);
      ENTRY(r8);
      ENTRY(r9);
      ENTRY(r10);
      ENTRY(r11);
      ENTRY(r12);
      ENTRY(r13);
      ENTRY(r14);
      ENTRY(r15);
      ENTRY(eflags);
      BLANK();
#undef ENTRY
#define ENTRY(entry) DEFINE(saved_context_ ## entry, offsetof(struct saved_context, entry))
      ENTRY(cr0);
      ENTRY(cr2);
      ENTRY(cr3);
      ENTRY(cr4);
      ENTRY(cr8);
      BLANK();
#undef ENTRY
      DEFINE(TSS_ist, offsetof(struct tss_struct, ist));
      BLANK();
      DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
      BLANK();
      DEFINE(__NR_syscall_max, sizeof(syscalls) - 1);

      BLANK();
      OFFSET(BP_scratch, boot_params, scratch);
      OFFSET(BP_loadflags, boot_params, hdr.loadflags);
      OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch);
      OFFSET(BP_version, boot_params, hdr.version);
      return 0;
}

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