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kernel/linux-rt-4.4.41/arch/arc/include/uapi/asm/ptrace.h 1.67 KB
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  /*
   * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   *
   * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
   */
  
  #ifndef _UAPI__ASM_ARC_PTRACE_H
  #define _UAPI__ASM_ARC_PTRACE_H
  
  #define PTRACE_GET_THREAD_AREA	25
  
  #ifndef __ASSEMBLY__
  /*
   * Userspace ABI: Register state needed by
   *  -ptrace (gdbserver)
   *  -sigcontext (SA_SIGNINFO signal frame)
   *
   * This is to decouple pt_regs from user-space ABI, to be able to change it
   * w/o affecting the ABI.
   *
   * The intermediate pad,pad2 are relics of initial layout based on pt_regs
   * for optimizations when copying pt_regs to/from user_regs_struct.
   * We no longer need them, but can't be changed as they are part of ABI now.
   *
   * Also, sigcontext only care about the scratch regs as that is what we really
   * save/restore for signal handling. However gdb also uses the same struct
   * hence callee regs need to be in there too.
  */
  struct user_regs_struct {
  
  	unsigned long pad;
  	struct {
  		unsigned long bta, lp_start, lp_end, lp_count;
  		unsigned long status32, ret, blink, fp, gp;
  		unsigned long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;
  		unsigned long sp;
  	} scratch;
  	unsigned long pad2;
  	struct {
  		unsigned long r25, r24, r23, r22, r21, r20;
  		unsigned long r19, r18, r17, r16, r15, r14, r13;
  	} callee;
  	unsigned long efa;	/* break pt addr, for break points in delay slots */
  	unsigned long stop_pc;	/* give dbg stop_pc after ensuring brkpt trap */
  };
  #endif /* !__ASSEMBLY__ */
  
  #endif /* _UAPI__ASM_ARC_PTRACE_H */