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asm-offsets.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/sched.h>

/* Use marker if you need to separate the values later */

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

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

int main(void)
{
      DEFINE(__THREAD_info, offsetof(struct task_struct, stack),);
      DEFINE(__THREAD_ksp, offsetof(struct task_struct, thread.ksp),);
      DEFINE(__THREAD_per, offsetof(struct task_struct, thread.per_info),);
      DEFINE(__THREAD_mm_segment,
             offsetof(struct task_struct, thread.mm_segment),);
      BLANK();
      DEFINE(__TASK_pid, offsetof(struct task_struct, pid),);
      BLANK();
      DEFINE(__PER_atmid, offsetof(per_struct, lowcore.words.perc_atmid),);
      DEFINE(__PER_address, offsetof(per_struct, lowcore.words.address),);
      DEFINE(__PER_access_id, offsetof(per_struct, lowcore.words.access_id),);
      BLANK();
      DEFINE(__TI_task, offsetof(struct thread_info, task),);
      DEFINE(__TI_domain, offsetof(struct thread_info, exec_domain),);
      DEFINE(__TI_flags, offsetof(struct thread_info, flags),);
      DEFINE(__TI_cpu, offsetof(struct thread_info, cpu),);
      DEFINE(__TI_precount, offsetof(struct thread_info, preempt_count),);
      BLANK();
      DEFINE(__PT_ARGS, offsetof(struct pt_regs, args),);
      DEFINE(__PT_PSW, offsetof(struct pt_regs, psw),);
      DEFINE(__PT_GPRS, offsetof(struct pt_regs, gprs),);
      DEFINE(__PT_ORIG_GPR2, offsetof(struct pt_regs, orig_gpr2),);
      DEFINE(__PT_ILC, offsetof(struct pt_regs, ilc),);
      DEFINE(__PT_TRAP, offsetof(struct pt_regs, trap),);
      DEFINE(__PT_SIZE, sizeof(struct pt_regs),);
      BLANK();
      DEFINE(__SF_BACKCHAIN, offsetof(struct stack_frame, back_chain),);
      DEFINE(__SF_GPRS, offsetof(struct stack_frame, gprs),);
      DEFINE(__SF_EMPTY, offsetof(struct stack_frame, empty1),);
      return 0;
}

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