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