LXR uboot/include/asm-arm/proc-armv/ptrace.h

   1/*
   2 *  linux/include/asm-arm/proc-armv/ptrace.h
   3 *
   4 *  Copyright (C) 1996-1999 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_PROC_PTRACE_H
  11#define __ASM_PROC_PTRACE_H
  12
  13#include <linux/config.h>
  14
  15#define USR26_MODE      0x00
  16#define FIQ26_MODE      0x01
  17#define IRQ26_MODE      0x02
  18#define SVC26_MODE      0x03
  19#define USR_MODE        0x10
  20#define FIQ_MODE        0x11
  21#define IRQ_MODE        0x12
  22#define SVC_MODE        0x13
  23#define ABT_MODE        0x17
  24#define UND_MODE        0x1b
  25#define SYSTEM_MODE     0x1f
  26#define MODE_MASK       0x1f
  27#define T_BIT           0x20
  28#define F_BIT           0x40
  29#define I_BIT           0x80
  30#define CC_V_BIT        (1 << 28)
  31#define CC_C_BIT        (1 << 29)
  32#define CC_Z_BIT        (1 << 30)
  33#define CC_N_BIT        (1 << 31)
  34#define PCMASK          0
  35
  36#ifndef __ASSEMBLY__
  37
  38/* this struct defines the way the registers are stored on the
  39   stack during a system call. */
  40
  41struct pt_regs {
  42        long uregs[18];
  43};
  44
  45#define ARM_cpsr        uregs[16]
  46#define ARM_pc          uregs[15]
  47#define ARM_lr          uregs[14]
  48#define ARM_sp          uregs[13]
  49#define ARM_ip          uregs[12]
  50#define ARM_fp          uregs[11]
  51#define ARM_r10         uregs[10]
  52#define ARM_r9          uregs[9]
  53#define ARM_r8          uregs[8]
  54#define ARM_r7          uregs[7]
  55#define ARM_r6          uregs[6]
  56#define ARM_r5          uregs[5]
  57#define ARM_r4          uregs[4]
  58#define ARM_r3          uregs[3]
  59#define ARM_r2          uregs[2]
  60#define ARM_r1          uregs[1]
  61#define ARM_r0          uregs[0]
  62#define ARM_ORIG_r0     uregs[17]
  63
  64#ifdef __KERNEL__
  65
  66#define user_mode(regs) \
  67        (((regs)->ARM_cpsr & 0xf) == 0)
  68
  69#ifdef CONFIG_ARM_THUMB
  70#define thumb_mode(regs) \
  71        (((regs)->ARM_cpsr & T_BIT))
  72#else
  73#define thumb_mode(regs) (0)
  74#endif
  75
  76#define processor_mode(regs) \
  77        ((regs)->ARM_cpsr & MODE_MASK)
  78
  79#define interrupts_enabled(regs) \
  80        (!((regs)->ARM_cpsr & I_BIT))
  81
  82#define fast_interrupts_enabled(regs) \
  83        (!((regs)->ARM_cpsr & F_BIT))
  84
  85#define condition_codes(regs) \
  86        ((regs)->ARM_cpsr & (CC_V_BIT|CC_C_BIT|CC_Z_BIT|CC_N_BIT))
  87
  88/* Are the current registers suitable for user mode?
  89 * (used to maintain security in signal handlers)
  90 */
  91static inline int valid_user_regs(struct pt_regs *regs)
  92{
  93        if ((regs->ARM_cpsr & 0xf) == 0 &&
  94            (regs->ARM_cpsr & (F_BIT|I_BIT)) == 0)
  95                return 1;
  96
  97        /*
  98         * Force CPSR to something logical...
  99         */
 100        regs->ARM_cpsr &= (CC_V_BIT|CC_C_BIT|CC_Z_BIT|CC_N_BIT|0x10);
 101
 102        return 0;
 103}
 104
 105#endif  /* __KERNEL__ */
 106
 107#endif  /* __ASSEMBLY__ */
 108
 109#endif
 110