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))) 105 106 #define arch_has_single_step() (1) 107 /* common code demands this function */ 108 #define ptrace_disable(child) user_disable_single_step(child) 109 110 extern int is_user_addr_valid(struct task_struct *child, 111 unsigned long start, unsigned long len); 112 113 /* 114 * Get the address of the live pt_regs for the specified task. 115 * These are saved onto the top kernel stack when the process 116 * is not running. 117 * 118 * Note: if a user thread is execve'd from kernel space, the 119 * kernel stack will not be empty on entry to the kernel, so 120 * ptracing these tasks will fail. 121 */ 122 #define task_pt_regs(task) \ 123 (struct pt_regs *) \ 124 ((unsigned long)task_stack_page(task) + \ 125 (THREAD_SIZE - sizeof(struct pt_regs))) 126 127 #include <asm-generic/ptrace.h> 128 129 #endif /* __KERNEL__ */ 130 131 #endif /* __ASSEMBLY__ */ 132 133 /* 134 * Offsets used by 'ptrace' system call interface. 135 */ 136 137 #define PT_R0 204 138 #define PT_R1 200 139 #define PT_R2 196 140 #define PT_R3 192 141 #define PT_R4 188 142 #define PT_R5 184 143 #define PT_R6 180 144 #define PT_R7 176 145 #define PT_P0 172 146 #define PT_P1 168 147 #define PT_P2 164 148 #define PT_P3 160 149 #define PT_P4 156 150 #define PT_P5 152 151 #define PT_FP 148 152 #define PT_USP 144 153 #define PT_I0 140 154 #define PT_I1 136 155 #define PT_I2 132 156 #define PT_I3 128 157 #define PT_M0 124 158 #define PT_M1 120 159 #define PT_M2 116 160 #define PT_M3 112 161 #define PT_L0 108 162 #define PT_L1 104 163 #define PT_L2 100 164 #define PT_L3 96 165 #define PT_B0 92 166 #define PT_B1 88 167 #define PT_B2 84 168 #define PT_B3 80 169 #define PT_A0X 76 170 #define PT_A0W 72 171 #define PT_A1X 68 172 #define PT_A1W 64 173 #define PT_LC0 60 174 #define PT_LC1 56 175 #define PT_LT0 52 176 #define PT_LT1 48 177 #define PT_LB0 44 178 #define PT_LB1 40 179 #define PT_ASTAT 36 180 #define PT_RESERVED 32 181 #define PT_RETS 28 182 #define PT_PC 24 183 #define PT_RETX 20 184 #define PT_RETN 16 185 #define PT_RETE 12 186 #define PT_SEQSTAT 8 187 #define PT_IPEND 4 188 189 #define PT_ORIG_R0 208 190 #define PT_ORIG_P0 212 191 #define PT_SYSCFG 216 192 #define PT_TEXT_ADDR 220 193 #define PT_TEXT_END_ADDR 224 194 #define PT_DATA_ADDR 228 195 #define PT_FDPIC_EXEC 232 196 #define PT_FDPIC_INTERP 236 197 198 #define PT_LAST_PSEUDO PT_FDPIC_INTERP 199 200 #endif /* _BFIN_PTRACE_H */ 201