target/linux/ubicom32/files/arch/ubicom32/include/asm/ptrace.h

   1 /*
   2  * arch/ubicom32/include/asm/ptrace.h
   3  *   Ubicom32 architecture ptrace support.
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  *
   7  * This file is part of the Ubicom32 Linux Kernel Port.
   8  *
   9  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  10  * it and/or modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation, either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  15  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  16  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  * the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with the Ubicom32 Linux Kernel Port.  If not,
  21  * see <http://www.gnu.org/licenses/>.
  22  *
  23  * Ubicom32 implementation derived from (with many thanks):
  24  *   arch/m68knommu
  25  *   arch/blackfin
  26  *   arch/parisc
  27  */
  28 #ifndef _ASM_UBICOM32_PTRACE_H
  29 #define _ASM_UBICOM32_PTRACE_H
  30
  31 #ifndef __ASSEMBLY__
  32
  33 /*
  34  * We use hard coded constants because this is shared with user
  35  * space and the values are NOT allowed to change.  Only fields
  36  * that are intended to be exposed get values.
  37  */
  38 #define PT_D0           0
  39 #define PT_D1           4
  40 #define PT_D2           8
  41 #define PT_D3           12
  42 #define PT_D4           16
  43 #define PT_D5           20
  44 #define PT_D6           24
  45 #define PT_D7           28
  46 #define PT_D8           32
  47 #define PT_D9           36
  48 #define PT_D10          40
  49 #define PT_D11          44
  50 #define PT_D12          48
  51 #define PT_D13          52
  52 #define PT_D14          56
  53 #define PT_D15          60
  54 #define PT_A0           64
  55 #define PT_A1           68
  56 #define PT_A2           72
  57 #define PT_A3           76
  58 #define PT_A4           80
  59 #define PT_A5           84
  60 #define PT_A6           88
  61 #define PT_A7           92
  62 #define PT_SP           92
  63 #define PT_ACC0HI       96
  64 #define PT_ACC0LO       100
  65 #define PT_MAC_RC16     104
  66 #define PT_ACC1HI       108
  67 #define PT_ACC1LO       112
  68 #define PT_SOURCE3      116
  69 #define PT_INST_CNT     120
  70 #define PT_CSR          124
  71 #define PT_DUMMY_UNUSED 128
  72 #define PT_INT_MASK0    132
  73 #define PT_INT_MASK1    136
  74 #define PT_TRAP_CAUSE   140
  75 #define PT_PC           144
  76 #define PT_ORIGINAL_D0  148
  77 #define PT_FRAME_TYPE   152
  78
  79 /*
  80  * The following 'registers' are not registers at all but are used
  81  * locate the relocated sections.
  82  */
  83 #define PT_TEXT_ADDR            200
  84 #define PT_TEXT_END_ADDR        204
  85 #define PT_DATA_ADDR            208
  86 #define PT_EXEC_FDPIC_LOADMAP   212
  87 #define PT_INTERP_FDPIC_LOADMAP 216
  88
  89 /*
  90  * This struct defines the way the registers are stored on the
  91  * stack during a system call.
  92  */
  93 enum thread_type {
  94         NORMAL_THREAD,
  95         KERNEL_THREAD,
  96 };
  97
  98 #define UBICOM32_FRAME_TYPE_SYSCALL     -1 /* System call frame */
  99 #define UBICOM32_FRAME_TYPE_INVALID     0 /* Invalid frame, no longer in use */
 100 #define UBICOM32_FRAME_TYPE_INTERRUPT   1 /* Interrupt frame */
 101 #define UBICOM32_FRAME_TYPE_TRAP        2 /* Trap frame */
 102 #define UBICOM32_FRAME_TYPE_SIGTRAMP    3 /* Signal trampoline frame. */
 103 #define UBICOM32_FRAME_TYPE_NEW_THREAD  4 /* New Thread. */
 104
 105 struct pt_regs {
 106         /*
 107          * Data Registers
 108          */
 109         unsigned long dn[16];
 110
 111         /*
 112          * Address Registers
 113          */
 114         unsigned long an[8];
 115
 116         /*
 117          * Per thread misc registers.
 118          */
 119         unsigned long acc0[2];
 120         unsigned long mac_rc16;
 121         unsigned long acc1[2];
 122         unsigned long source3;
 123         unsigned long inst_cnt;
 124         unsigned long csr;
 125         unsigned long dummy_unused;
 126         unsigned long int_mask0;
 127         unsigned long int_mask1;
 128         unsigned long trap_cause;
 129         unsigned long pc;
 130         unsigned long original_dn_0;
 131
 132         /*
 133          * Frame type. Syscall frames are -1. For other types look above.
 134          */
 135         unsigned long frame_type;
 136
 137         /*
 138          * These fields are not exposed to ptrace.
 139          */
 140         unsigned long previous_pc;
 141         long nesting_level;             /* When the kernel in in user space this
 142                                          * will be -1. */
 143         unsigned long thread_type;      /* This indicates if this is a kernel
 144                                          * thread. */
 145 };
 146
 147 /*
 148  * This is the extended stack used by signal handlers and the context
 149  * switcher: it's pushed after the normal "struct pt_regs".
 150  */
 151 struct switch_stack {
 152         unsigned long  dummy;
 153 };
 154
 155 #ifdef __KERNEL__
 156
 157 /* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
 158 #define PTRACE_GETREGS          12
 159 #define PTRACE_SETREGS          13
 160
 161 #ifndef PS_S
 162 #define PS_S  (0x2000)
 163 #define PS_M  (0x1000)
 164 #endif
 165
 166 extern  int __user_mode(unsigned long sp);
 167
 168 #define user_mode(regs) (__user_mode((regs->an[7])))
 169 #define user_stack(regs) ((regs)->an[7])
 170 #define instruction_pointer(regs) ((regs)->pc)
 171 #define profile_pc(regs) instruction_pointer(regs)
 172 extern void show_regs(struct pt_regs *);
 173 #endif /* __KERNEL__ */
 174
 175 #endif /* __ASSEMBLY__ */
 176
 177 #endif /* _ASM_UBICOM32_PTRACE_H */