include/asm-arm/ptrace.h

   1 /*
   2  *  linux/include/asm-arm/ptrace.h
   3  *
   4  *  Copyright (C) 1996-2003 Russell King
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #ifndef __ASM_ARM_PTRACE_H
  11 #define __ASM_ARM_PTRACE_H
  12
  13
  14 #define PTRACE_GETREGS          12
  15 #define PTRACE_SETREGS          13
  16 #define PTRACE_GETFPREGS        14
  17 #define PTRACE_SETFPREGS        15
  18
  19 #define PTRACE_GETWMMXREGS      18
  20 #define PTRACE_SETWMMXREGS      19
  21
  22 #define PTRACE_OLDSETOPTIONS    21
  23
  24 #define PTRACE_GET_THREAD_AREA  22
  25
  26 #define PTRACE_SET_SYSCALL      23
  27
  28 /*
  29  * PSR bits
  30  */
  31 #define USR26_MODE      0x00000000
  32 #define FIQ26_MODE      0x00000001
  33 #define IRQ26_MODE      0x00000002
  34 #define SVC26_MODE      0x00000003
  35 #define USR_MODE        0x00000010
  36 #define FIQ_MODE        0x00000011
  37 #define IRQ_MODE        0x00000012
  38 #define SVC_MODE        0x00000013
  39 #define ABT_MODE        0x00000017
  40 #define UND_MODE        0x0000001b
  41 #define SYSTEM_MODE     0x0000001f
  42 #define MODE32_BIT      0x00000010
  43 #define MODE_MASK       0x0000001f
  44 #define PSR_T_BIT       0x00000020
  45 #define PSR_F_BIT       0x00000040
  46 #define PSR_I_BIT       0x00000080
  47 #define PSR_J_BIT       0x01000000
  48 #define PSR_Q_BIT       0x08000000
  49 #define PSR_V_BIT       0x10000000
  50 #define PSR_C_BIT       0x20000000
  51 #define PSR_Z_BIT       0x40000000
  52 #define PSR_N_BIT       0x80000000
  53 #define PCMASK          0
  54
  55 /*
  56  * Groups of PSR bits
  57  */
  58 #define PSR_f           0xff000000      /* Flags                */
  59 #define PSR_s           0x00ff0000      /* Status               */
  60 #define PSR_x           0x0000ff00      /* Extension            */
  61 #define PSR_c           0x000000ff      /* Control              */
  62
  63 #ifndef __ASSEMBLY__
  64
  65 /*
  66  * This struct defines the way the registers are stored on the
  67  * stack during a system call.  Note that sizeof(struct pt_regs)
  68  * has to be a multiple of 8.
  69  */
  70 struct pt_regs {
  71         long uregs[18];
  72 };
  73
  74 #define ARM_cpsr        uregs[16]
  75 #define ARM_pc          uregs[15]
  76 #define ARM_lr          uregs[14]
  77 #define ARM_sp          uregs[13]
  78 #define ARM_ip          uregs[12]
  79 #define ARM_fp          uregs[11]
  80 #define ARM_r10         uregs[10]
  81 #define ARM_r9          uregs[9]
  82 #define ARM_r8          uregs[8]
  83 #define ARM_r7          uregs[7]
  84 #define ARM_r6          uregs[6]
  85 #define ARM_r5          uregs[5]
  86 #define ARM_r4          uregs[4]
  87 #define ARM_r3          uregs[3]
  88 #define ARM_r2          uregs[2]
  89 #define ARM_r1          uregs[1]
  90 #define ARM_r0          uregs[0]
  91 #define ARM_ORIG_r0     uregs[17]
  92
  93 #ifdef __KERNEL__
  94
  95 #define user_mode(regs) \
  96         (((regs)->ARM_cpsr & 0xf) == 0)
  97
  98 #ifdef CONFIG_ARM_THUMB
  99 #define thumb_mode(regs) \
 100         (((regs)->ARM_cpsr & PSR_T_BIT))
 101 #else
 102 #define thumb_mode(regs) (0)
 103 #endif
 104
 105 #define processor_mode(regs) \
 106         ((regs)->ARM_cpsr & MODE_MASK)
 107
 108 #define interrupts_enabled(regs) \
 109         (!((regs)->ARM_cpsr & PSR_I_BIT))
 110
 111 #define fast_interrupts_enabled(regs) \
 112         (!((regs)->ARM_cpsr & PSR_F_BIT))
 113
 114 #define condition_codes(regs) \
 115         ((regs)->ARM_cpsr & (PSR_V_BIT|PSR_C_BIT|PSR_Z_BIT|PSR_N_BIT))
 116
 117 /* Are the current registers suitable for user mode?
 118  * (used to maintain security in signal handlers)
 119  */
 120 static inline int valid_user_regs(struct pt_regs *regs)
 121 {
 122         if (user_mode(regs) &&
 123             (regs->ARM_cpsr & (PSR_F_BIT|PSR_I_BIT)) == 0)
 124                 return 1;
 125
 126         /*
 127          * Force CPSR to something logical...
 128          */
 129         regs->ARM_cpsr &= PSR_f | PSR_s | PSR_x | PSR_T_BIT | MODE32_BIT;
 130
 131         return 0;
 132 }
 133
 134 #endif  /* __KERNEL__ */
 135
 136 #define pc_pointer(v) \
 137         ((v) & ~PCMASK)
 138
 139 #define instruction_pointer(regs) \
 140         (pc_pointer((regs)->ARM_pc))
 141
 142 #ifdef CONFIG_SMP
 143 extern unsigned long profile_pc(struct pt_regs *regs);
 144 #else
 145 #define profile_pc(regs) instruction_pointer(regs)
 146 #endif
 147
 148 #ifdef __KERNEL__
 149 #define predicate(x)            ((x) & 0xf0000000)
 150 #define PREDICATE_ALWAYS        0xe0000000
 151 #endif
 152
 153 #endif /* __ASSEMBLY__ */
 154
 155 #endif
 156