arch/arc/include/uapi/asm/ptrace.h

   1 /*
   2  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
   9  */
  10
  11 #ifndef _UAPI__ASM_ARC_PTRACE_H
  12 #define _UAPI__ASM_ARC_PTRACE_H
  13
  14
  15 #ifndef __ASSEMBLY__
  16 /*
  17  * Userspace ABI: Register state needed by
  18  *  -ptrace (gdbserver)
  19  *  -sigcontext (SA_SIGNINFO signal frame)
  20  *
  21  * This is to decouple pt_regs from user-space ABI, to be able to change it
  22  * w/o affecting the ABI.
  23  *
  24  * The intermediate pad,pad2 are relics of initial layout based on pt_regs
  25  * for optimizations when copying pt_regs to/from user_regs_struct.
  26  * We no longer need them, but can't be changed as they are part of ABI now.
  27  *
  28  * Also, sigcontext only care about the scratch regs as that is what we really
  29  * save/restore for signal handling. However gdb also uses the same struct
  30  * hence callee regs need to be in there too.
  31 */
  32 struct user_regs_struct {
  33
  34         long pad;
  35         struct {
  36                 long bta, lp_start, lp_end, lp_count;
  37                 long status32, ret, blink, fp, gp;
  38                 long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;
  39                 long sp;
  40         } scratch;
  41         long pad2;
  42         struct {
  43                 long r25, r24, r23, r22, r21, r20;
  44                 long r19, r18, r17, r16, r15, r14, r13;
  45         } callee;
  46         long efa;       /* break pt addr, for break points in delay slots */
  47         long stop_pc;   /* give dbg stop_pc after ensuring brkpt trap */
  48 };
  49 #endif /* !__ASSEMBLY__ */
  50
  51 #endif /* _UAPI__ASM_ARC_PTRACE_H */