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