arch/unicore32/include/asm/ptrace.h

   1 /*
   2  * linux/arch/unicore32/include/asm/ptrace.h
   3  *
   4  * Code specific to PKUnity SoC and UniCore ISA
   5  *
   6  * Copyright (C) 2001-2010 GUAN Xue-tao
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12 #ifndef __UNICORE_PTRACE_H__
  13 #define __UNICORE_PTRACE_H__
  14
  15 #define PTRACE_GET_THREAD_AREA  22
  16
  17 /*
  18  * PSR bits
  19  */
  20 #define USER_MODE       0x00000010
  21 #define REAL_MODE       0x00000011
  22 #define INTR_MODE       0x00000012
  23 #define PRIV_MODE       0x00000013
  24 #define ABRT_MODE       0x00000017
  25 #define EXTN_MODE       0x0000001b
  26 #define SUSR_MODE       0x0000001f
  27 #define MODE_MASK       0x0000001f
  28 #define PSR_R_BIT       0x00000040
  29 #define PSR_I_BIT       0x00000080
  30 #define PSR_V_BIT       0x10000000
  31 #define PSR_C_BIT       0x20000000
  32 #define PSR_Z_BIT       0x40000000
  33 #define PSR_S_BIT       0x80000000
  34
  35 /*
  36  * Groups of PSR bits
  37  */
  38 #define PSR_f           0xff000000      /* Flags                */
  39 #define PSR_c           0x000000ff      /* Control              */
  40
  41 #ifndef __ASSEMBLY__
  42
  43 /*
  44  * This struct defines the way the registers are stored on the
  45  * stack during a system call.  Note that sizeof(struct pt_regs)
  46  * has to be a multiple of 8.
  47  */
  48 struct pt_regs {
  49         unsigned long uregs[34];
  50 };
  51
  52 #define UCreg_asr               uregs[32]
  53 #define UCreg_pc                uregs[31]
  54 #define UCreg_lr                uregs[30]
  55 #define UCreg_sp                uregs[29]
  56 #define UCreg_ip                uregs[28]
  57 #define UCreg_fp                uregs[27]
  58 #define UCreg_26                uregs[26]
  59 #define UCreg_25                uregs[25]
  60 #define UCreg_24                uregs[24]
  61 #define UCreg_23                uregs[23]
  62 #define UCreg_22                uregs[22]
  63 #define UCreg_21                uregs[21]
  64 #define UCreg_20                uregs[20]
  65 #define UCreg_19                uregs[19]
  66 #define UCreg_18                uregs[18]
  67 #define UCreg_17                uregs[17]
  68 #define UCreg_16                uregs[16]
  69 #define UCreg_15                uregs[15]
  70 #define UCreg_14                uregs[14]
  71 #define UCreg_13                uregs[13]
  72 #define UCreg_12                uregs[12]
  73 #define UCreg_11                uregs[11]
  74 #define UCreg_10                uregs[10]
  75 #define UCreg_09                uregs[9]
  76 #define UCreg_08                uregs[8]
  77 #define UCreg_07                uregs[7]
  78 #define UCreg_06                uregs[6]
  79 #define UCreg_05                uregs[5]
  80 #define UCreg_04                uregs[4]
  81 #define UCreg_03                uregs[3]
  82 #define UCreg_02                uregs[2]
  83 #define UCreg_01                uregs[1]
  84 #define UCreg_00                uregs[0]
  85 #define UCreg_ORIG_00           uregs[33]
  86
  87 #ifdef __KERNEL__
  88
  89 #define user_mode(regs) \
  90         (processor_mode(regs) == USER_MODE)
  91
  92 #define processor_mode(regs) \
  93         ((regs)->UCreg_asr & MODE_MASK)
  94
  95 #define interrupts_enabled(regs) \
  96         (!((regs)->UCreg_asr & PSR_I_BIT))
  97
  98 #define fast_interrupts_enabled(regs) \
  99         (!((regs)->UCreg_asr & PSR_R_BIT))
 100
 101 /* Are the current registers suitable for user mode?
 102  * (used to maintain security in signal handlers)
 103  */
 104 static inline int valid_user_regs(struct pt_regs *regs)
 105 {
 106         unsigned long mode = regs->UCreg_asr & MODE_MASK;
 107
 108         /*
 109          * Always clear the R (REAL) bits
 110          */
 111         regs->UCreg_asr &= ~(PSR_R_BIT);
 112
 113         if ((regs->UCreg_asr & PSR_I_BIT) == 0) {
 114                 if (mode == USER_MODE)
 115                         return 1;
 116         }
 117
 118         /*
 119          * Force ASR to something logical...
 120          */
 121         regs->UCreg_asr &= PSR_f | USER_MODE;
 122
 123         return 0;
 124 }
 125
 126 #define instruction_pointer(regs)       ((regs)->UCreg_pc)
 127
 128 #endif /* __KERNEL__ */
 129
 130 #endif /* __ASSEMBLY__ */
 131
 132 #endif
 133