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