arch/avr32/include/asm/ptrace.h

   1 /*
   2  * Copyright (C) 2004-2006 Atmel Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8 #ifndef __ASM_AVR32_PTRACE_H
   9 #define __ASM_AVR32_PTRACE_H
  10
  11 #define PTRACE_GETREGS          12
  12 #define PTRACE_SETREGS          13
  13
  14 /*
  15  * Status Register bits
  16  */
  17 #define SR_H            0x20000000
  18 #define SR_J            0x10000000
  19 #define SR_DM           0x08000000
  20 #define SR_D            0x04000000
  21 #define MODE_NMI        0x01c00000
  22 #define MODE_EXCEPTION  0x01800000
  23 #define MODE_INT3       0x01400000
  24 #define MODE_INT2       0x01000000
  25 #define MODE_INT1       0x00c00000
  26 #define MODE_INT0       0x00800000
  27 #define MODE_SUPERVISOR 0x00400000
  28 #define MODE_USER       0x00000000
  29 #define MODE_MASK       0x01c00000
  30 #define SR_EM           0x00200000
  31 #define SR_I3M          0x00100000
  32 #define SR_I2M          0x00080000
  33 #define SR_I1M          0x00040000
  34 #define SR_I0M          0x00020000
  35 #define SR_GM           0x00010000
  36
  37 #define SR_H_BIT        29
  38 #define SR_J_BIT        28
  39 #define SR_DM_BIT       27
  40 #define SR_D_BIT        26
  41 #define MODE_SHIFT      22
  42 #define SR_EM_BIT       21
  43 #define SR_I3M_BIT      20
  44 #define SR_I2M_BIT      19
  45 #define SR_I1M_BIT      18
  46 #define SR_I0M_BIT      17
  47 #define SR_GM_BIT       16
  48
  49 /* The user-visible part */
  50 #define SR_L            0x00000020
  51 #define SR_Q            0x00000010
  52 #define SR_V            0x00000008
  53 #define SR_N            0x00000004
  54 #define SR_Z            0x00000002
  55 #define SR_C            0x00000001
  56
  57 #define SR_L_BIT        5
  58 #define SR_Q_BIT        4
  59 #define SR_V_BIT        3
  60 #define SR_N_BIT        2
  61 #define SR_Z_BIT        1
  62 #define SR_C_BIT        0
  63
  64 /*
  65  * The order is defined by the stmts instruction. r0 is stored first,
  66  * so it gets the highest address.
  67  *
  68  * Registers 0-12 are general-purpose registers (r12 is normally used for
  69  * the function return value).
  70  * Register 13 is the stack pointer
  71  * Register 14 is the link register
  72  * Register 15 is the program counter (retrieved from the RAR sysreg)
  73  */
  74 #define FRAME_SIZE_FULL 72
  75 #define REG_R12_ORIG    68
  76 #define REG_R0          64
  77 #define REG_R1          60
  78 #define REG_R2          56
  79 #define REG_R3          52
  80 #define REG_R4          48
  81 #define REG_R5          44
  82 #define REG_R6          40
  83 #define REG_R7          36
  84 #define REG_R8          32
  85 #define REG_R9          28
  86 #define REG_R10         24
  87 #define REG_R11         20
  88 #define REG_R12         16
  89 #define REG_SP          12
  90 #define REG_LR           8
  91
  92 #define FRAME_SIZE_MIN   8
  93 #define REG_PC           4
  94 #define REG_SR           0
  95
  96 #ifndef __ASSEMBLY__
  97 struct pt_regs {
  98         /* These are always saved */
  99         unsigned long sr;
 100         unsigned long pc;
 101
 102         /* These are sometimes saved */
 103         unsigned long lr;
 104         unsigned long sp;
 105         unsigned long r12;
 106         unsigned long r11;
 107         unsigned long r10;
 108         unsigned long r9;
 109         unsigned long r8;
 110         unsigned long r7;
 111         unsigned long r6;
 112         unsigned long r5;
 113         unsigned long r4;
 114         unsigned long r3;
 115         unsigned long r2;
 116         unsigned long r1;
 117         unsigned long r0;
 118
 119         /* Only saved on system call */
 120         unsigned long r12_orig;
 121 };
 122
 123 #ifdef __KERNEL__
 124
 125 #include <asm/ocd.h>
 126
 127 #define arch_has_single_step()          (1)
 128
 129 #define arch_ptrace_attach(child)       ocd_enable(child)
 130
 131 #define user_mode(regs)                 (((regs)->sr & MODE_MASK) == MODE_USER)
 132 #define instruction_pointer(regs)       ((regs)->pc)
 133 #define profile_pc(regs)                instruction_pointer(regs)
 134
 135 static __inline__ int valid_user_regs(struct pt_regs *regs)
 136 {
 137         /*
 138          * Some of the Java bits might be acceptable if/when we
 139          * implement some support for that stuff...
 140          */
 141         if ((regs->sr & 0xffff0000) == 0)
 142                 return 1;
 143
 144         /*
 145          * Force status register flags to be sane and report this
 146          * illegal behaviour...
 147          */
 148         regs->sr &= 0x0000ffff;
 149         return 0;
 150 }
 151
 152
 153 #endif /* __KERNEL__ */
 154
 155 #endif /* ! __ASSEMBLY__ */
 156
 157 #endif /* __ASM_AVR32_PTRACE_H */