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kernel/linux-imx6_3.14.28/arch/openrisc/kernel/asm-offsets.c 2.19 KB
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  /*
   * OpenRISC asm-offsets.c
   *
   * Linux architectural port borrowing liberally from similar works of
   * others.  All original copyrights apply as per the original source
   * declaration.
   *
   * Modifications for the OpenRISC architecture:
   * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
   * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
   *
   *      This program is free software; you can redistribute it and/or
   *      modify it under the terms of the GNU General Public License
   *      as published by the Free Software Foundation; either version
   *      2 of the License, or (at your option) any later version.
   *
   * This program is used to generate definitions needed by
   * assembly language modules.
   *
   * We use the technique used in the OSF Mach kernel code:
   * generate asm statements containing #defines,
   * compile this file to assembler, and then extract the
   * #defines from the assembly-language output.
   */
  
  #include <linux/signal.h>
  #include <linux/sched.h>
  #include <linux/kernel.h>
  #include <linux/errno.h>
  #include <linux/string.h>
  #include <linux/types.h>
  #include <linux/ptrace.h>
  #include <linux/mman.h>
  #include <linux/mm.h>
  #include <linux/io.h>
  #include <linux/thread_info.h>
  #include <linux/kbuild.h>
  #include <asm/page.h>
  #include <asm/pgtable.h>
  #include <asm/processor.h>
  
  int main(void)
  {
  	/* offsets into the task_struct */
  	DEFINE(TASK_STATE, offsetof(struct task_struct, state));
  	DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
  	DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
  	DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
  	DEFINE(TASK_MM, offsetof(struct task_struct, mm));
  	DEFINE(TASK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
  
  	/* offsets into thread_info */
  	DEFINE(TI_TASK, offsetof(struct thread_info, task));
  	DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
  	DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
  	DEFINE(TI_KSP, offsetof(struct thread_info, ksp));
  
  	DEFINE(PT_SIZE, sizeof(struct pt_regs));
  
  	/* Interrupt register frame */
  	DEFINE(STACK_FRAME_OVERHEAD, STACK_FRAME_OVERHEAD);
  	DEFINE(INT_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs));
  
  	DEFINE(NUM_USER_SEGMENTS, TASK_SIZE >> 28);
  	return 0;
  }