include/asm-arm26/ptrace.h

   1 #ifndef __ASM_ARM_PTRACE_H
   2 #define __ASM_ARM_PTRACE_H
   3
   4 #define PTRACE_GETREGS          12
   5 #define PTRACE_SETREGS          13
   6 #define PTRACE_GETFPREGS        14
   7 #define PTRACE_SETFPREGS        15
   8 #define PTRACE_OLDSETOPTIONS    21
   9
  10 /* options set using PTRACE_SETOPTIONS */
  11 #define PTRACE_O_TRACESYSGOOD   0x00000001
  12
  13 #define MODE_USR26      0x00000000
  14 #define MODE_FIQ26      0x00000001
  15 #define MODE_IRQ26      0x00000002
  16 #define MODE_SVC26      0x00000003
  17 #define MODE_MASK       0x00000003
  18
  19 #define PSR_F_BIT       0x04000000
  20 #define PSR_I_BIT       0x08000000
  21 #define PSR_V_BIT       0x10000000
  22 #define PSR_C_BIT       0x20000000
  23 #define PSR_Z_BIT       0x40000000
  24 #define PSR_N_BIT       0x80000000
  25
  26 #define PCMASK          0xfc000003
  27
  28
  29 #ifndef __ASSEMBLY__
  30
  31 #define pc_pointer(v) ((v) & ~PCMASK)   /* convert v to pc type address */
  32 #define instruction_pointer(regs) (pc_pointer((regs)->ARM_pc)) /* get pc */
  33 #define profile_pc(regs) instruction_pointer(regs)
  34
  35 /* this struct defines the way the registers are stored on the
  36    stack during a system call. */
  37
  38 struct pt_regs {
  39         long uregs[17];
  40 };
  41
  42 #define ARM_pc          uregs[15]
  43 #define ARM_lr          uregs[14]
  44 #define ARM_sp          uregs[13]
  45 #define ARM_ip          uregs[12]
  46 #define ARM_fp          uregs[11]
  47 #define ARM_r10         uregs[10]
  48 #define ARM_r9          uregs[9]
  49 #define ARM_r8          uregs[8]
  50 #define ARM_r7          uregs[7]
  51 #define ARM_r6          uregs[6]
  52 #define ARM_r5          uregs[5]
  53 #define ARM_r4          uregs[4]
  54 #define ARM_r3          uregs[3]
  55 #define ARM_r2          uregs[2]
  56 #define ARM_r1          uregs[1]
  57 #define ARM_r0          uregs[0]
  58 #define ARM_ORIG_r0     uregs[16]
  59
  60 #ifdef __KERNEL__
  61
  62 #define processor_mode(regs) \
  63         ((regs)->ARM_pc & MODE_MASK)
  64
  65 #define user_mode(regs) \
  66         (processor_mode(regs) == MODE_USR26)
  67
  68 #define interrupts_enabled(regs) \
  69         (!((regs)->ARM_pc & PSR_I_BIT))
  70
  71 #define fast_interrupts_enabled(regs) \
  72         (!((regs)->ARM_pc & PSR_F_BIT))
  73
  74 #define condition_codes(regs) \
  75         ((regs)->ARM_pc & (PSR_V_BIT|PSR_C_BIT|PSR_Z_BIT|PSR_N_BIT))
  76
  77 /* Are the current registers suitable for user mode?
  78  * (used to maintain security in signal handlers)
  79  */
  80 static inline int valid_user_regs(struct pt_regs *regs)
  81 {
  82         if (user_mode(regs) &&
  83             (regs->ARM_pc & (PSR_F_BIT | PSR_I_BIT)) == 0)
  84                 return 1;
  85
  86         /*
  87          * force it to be something sensible
  88          */
  89         regs->ARM_pc &= ~(MODE_MASK | PSR_F_BIT | PSR_I_BIT);
  90
  91         return 0;
  92 }
  93
  94 extern void show_regs(struct pt_regs *);
  95
  96 #define predicate(x)    (x & 0xf0000000)
  97 #define PREDICATE_ALWAYS        0xe0000000
  98
  99 #endif  /* __KERNEL__ */
 100
 101 #endif  /* __ASSEMBLY__ */
 102
 103 #endif
 104