arch/blackfin/include/asm/ptrace.h

   1 /*
   2  * Copyright 2004-2008 Analog Devices Inc.
   3  *
   4  * Licensed under the GPL-2 or later.
   5  */
   6
   7 #ifndef _BFIN_PTRACE_H
   8 #define _BFIN_PTRACE_H
   9
  10 /*
  11  * GCC defines register number like this:
  12  * -----------------------------
  13  *       0 - 7 are data registers R0-R7
  14  *       8 - 15 are address registers P0-P7
  15  *      16 - 31 dsp registers I/B/L0 -- I/B/L3 & M0--M3
  16  *      32 - 33 A registers A0 & A1
  17  *      34 -    status register
  18  * -----------------------------
  19  *
  20  * We follows above, except:
  21  *      32-33 --- Low 32-bit of A0&1
  22  *      34-35 --- High 8-bit of A0&1
  23  */
  24
  25 #ifndef __ASSEMBLY__
  26
  27 struct task_struct;
  28
  29 /* this struct defines the way the registers are stored on the
  30    stack during a system call. */
  31
  32 struct pt_regs {
  33         long orig_pc;
  34         long ipend;
  35         long seqstat;
  36         long rete;
  37         long retn;
  38         long retx;
  39         long pc;                /* PC == RETI */
  40         long rets;
  41         long reserved;          /* Used as scratch during system calls */
  42         long astat;
  43         long lb1;
  44         long lb0;
  45         long lt1;
  46         long lt0;
  47         long lc1;
  48         long lc0;
  49         long a1w;
  50         long a1x;
  51         long a0w;
  52         long a0x;
  53         long b3;
  54         long b2;
  55         long b1;
  56         long b0;
  57         long l3;
  58         long l2;
  59         long l1;
  60         long l0;
  61         long m3;
  62         long m2;
  63         long m1;
  64         long m0;
  65         long i3;
  66         long i2;
  67         long i1;
  68         long i0;
  69         long usp;
  70         long fp;
  71         long p5;
  72         long p4;
  73         long p3;
  74         long p2;
  75         long p1;
  76         long p0;
  77         long r7;
  78         long r6;
  79         long r5;
  80         long r4;
  81         long r3;
  82         long r2;
  83         long r1;
  84         long r0;
  85         long orig_r0;
  86         long orig_p0;
  87         long syscfg;
  88 };
  89
  90 /* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
  91 #define PTRACE_GETREGS            12
  92 #define PTRACE_SETREGS            13    /* ptrace signal  */
  93
  94 #define PTRACE_GETFDPIC           31    /* get the ELF fdpic loadmap address */
  95 #define PTRACE_GETFDPIC_EXEC       0    /* [addr] request the executable loadmap */
  96 #define PTRACE_GETFDPIC_INTERP     1    /* [addr] request the interpreter loadmap */
  97
  98 #define PS_S  (0x0002)
  99
 100 #ifdef __KERNEL__
 101
 102 /* user_mode returns true if only one bit is set in IPEND, other than the
 103    master interrupt enable.  */
 104 #define user_mode(regs) (!(((regs)->ipend & ~0x10) & (((regs)->ipend & ~0x10) - 1)))
 105 #define instruction_pointer(regs) ((regs)->pc)
 106 #define user_stack_pointer(regs)  ((regs)->usp)
 107 #define profile_pc(regs) instruction_pointer(regs)
 108 extern void show_regs(struct pt_regs *);
 109
 110 #define arch_has_single_step()  (1)
 111 extern void user_enable_single_step(struct task_struct *child);
 112 extern void user_disable_single_step(struct task_struct *child);
 113 /* common code demands this function */
 114 #define ptrace_disable(child) user_disable_single_step(child)
 115
 116 extern int is_user_addr_valid(struct task_struct *child,
 117                               unsigned long start, unsigned long len);
 118
 119 /*
 120  * Get the address of the live pt_regs for the specified task.
 121  * These are saved onto the top kernel stack when the process
 122  * is not running.
 123  *
 124  * Note: if a user thread is execve'd from kernel space, the
 125  * kernel stack will not be empty on entry to the kernel, so
 126  * ptracing these tasks will fail.
 127  */
 128 #define task_pt_regs(task) \
 129         (struct pt_regs *) \
 130             ((unsigned long)task_stack_page(task) + \
 131              (THREAD_SIZE - sizeof(struct pt_regs)))
 132
 133 #endif  /*  __KERNEL__  */
 134
 135 #endif                          /* __ASSEMBLY__ */
 136
 137 /*
 138  * Offsets used by 'ptrace' system call interface.
 139  */
 140
 141 #define PT_R0 204
 142 #define PT_R1 200
 143 #define PT_R2 196
 144 #define PT_R3 192
 145 #define PT_R4 188
 146 #define PT_R5 184
 147 #define PT_R6 180
 148 #define PT_R7 176
 149 #define PT_P0 172
 150 #define PT_P1 168
 151 #define PT_P2 164
 152 #define PT_P3 160
 153 #define PT_P4 156
 154 #define PT_P5 152
 155 #define PT_FP 148
 156 #define PT_USP 144
 157 #define PT_I0 140
 158 #define PT_I1 136
 159 #define PT_I2 132
 160 #define PT_I3 128
 161 #define PT_M0 124
 162 #define PT_M1 120
 163 #define PT_M2 116
 164 #define PT_M3 112
 165 #define PT_L0 108
 166 #define PT_L1 104
 167 #define PT_L2 100
 168 #define PT_L3 96
 169 #define PT_B0 92
 170 #define PT_B1 88
 171 #define PT_B2 84
 172 #define PT_B3 80
 173 #define PT_A0X 76
 174 #define PT_A0W 72
 175 #define PT_A1X 68
 176 #define PT_A1W 64
 177 #define PT_LC0 60
 178 #define PT_LC1 56
 179 #define PT_LT0 52
 180 #define PT_LT1 48
 181 #define PT_LB0 44
 182 #define PT_LB1 40
 183 #define PT_ASTAT 36
 184 #define PT_RESERVED 32
 185 #define PT_RETS 28
 186 #define PT_PC 24
 187 #define PT_RETX 20
 188 #define PT_RETN 16
 189 #define PT_RETE 12
 190 #define PT_SEQSTAT 8
 191 #define PT_IPEND 4
 192
 193 #define PT_ORIG_R0 208
 194 #define PT_ORIG_P0 212
 195 #define PT_SYSCFG 216
 196 #define PT_TEXT_ADDR 220
 197 #define PT_TEXT_END_ADDR 224
 198 #define PT_DATA_ADDR 228
 199 #define PT_FDPIC_EXEC 232
 200 #define PT_FDPIC_INTERP 236
 201
 202 #define PT_LAST_PSEUDO PT_FDPIC_INTERP
 203
 204 #endif                          /* _BFIN_PTRACE_H */