LXR linux/arch/nios2/include/asm/ptrace.h

   1/*
   2 * Copyright (C) 2013 Altera Corporation
   3 * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
   4 * Copyright (C) 2004 Microtronix Datacom Ltd
   5 *
   6 * based on m68k asm/processor.h
   7 *
   8 * This file is subject to the terms and conditions of the GNU General Public
   9 * License.  See the file "COPYING" in the main directory of this archive
  10 * for more details.
  11 */
  12
  13#ifndef _ASM_NIOS2_PTRACE_H
  14#define _ASM_NIOS2_PTRACE_H
  15
  16#include <uapi/asm/ptrace.h>
  17
  18/* This struct defines the way the registers are stored on the
  19   stack during a system call.  */
  20
  21#ifndef __ASSEMBLY__
  22struct pt_regs {
  23        unsigned long  r8;      /* r8-r15 Caller-saved GP registers */
  24        unsigned long  r9;
  25        unsigned long  r10;
  26        unsigned long  r11;
  27        unsigned long  r12;
  28        unsigned long  r13;
  29        unsigned long  r14;
  30        unsigned long  r15;
  31        unsigned long  r1;      /* Assembler temporary */
  32        unsigned long  r2;      /* Retval LS 32bits */
  33        unsigned long  r3;      /* Retval MS 32bits */
  34        unsigned long  r4;      /* r4-r7 Register arguments */
  35        unsigned long  r5;
  36        unsigned long  r6;
  37        unsigned long  r7;
  38        unsigned long  orig_r2; /* Copy of r2 ?? */
  39        unsigned long  ra;      /* Return address */
  40        unsigned long  fp;      /* Frame pointer */
  41        unsigned long  sp;      /* Stack pointer */
  42        unsigned long  gp;      /* Global pointer */
  43        unsigned long  estatus;
  44        unsigned long  ea;      /* Exception return address (pc) */
  45        unsigned long  orig_r7;
  46};
  47
  48/*
  49 * This is the extended stack used by signal handlers and the context
  50 * switcher: it's pushed after the normal "struct pt_regs".
  51 */
  52struct switch_stack {
  53        unsigned long  r16;     /* r16-r23 Callee-saved GP registers */
  54        unsigned long  r17;
  55        unsigned long  r18;
  56        unsigned long  r19;
  57        unsigned long  r20;
  58        unsigned long  r21;
  59        unsigned long  r22;
  60        unsigned long  r23;
  61        unsigned long  fp;
  62        unsigned long  gp;
  63        unsigned long  ra;
  64};
  65
  66#define user_mode(regs) (((regs)->estatus & ESTATUS_EU))
  67
  68#define instruction_pointer(regs)       ((regs)->ra)
  69#define profile_pc(regs)                instruction_pointer(regs)
  70#define user_stack_pointer(regs)        ((regs)->sp)
  71extern void show_regs(struct pt_regs *);
  72
  73#define current_pt_regs() \
  74        ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE)\
  75                - 1)
  76
  77int do_syscall_trace_enter(void);
  78void do_syscall_trace_exit(void);
  79#endif /* __ASSEMBLY__ */
  80#endif /* _ASM_NIOS2_PTRACE_H */
  81