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__
  22 struct 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  */
  52 struct 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)
  71 extern 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
  77 int do_syscall_trace_enter(void);
  78 void do_syscall_trace_exit(void);
  79 #endif /* __ASSEMBLY__ */
  80 #endif /* _ASM_NIOS2_PTRACE_H */