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 14 #define PTRACE_GETREGS 12 15 #define PTRACE_SETREGS 13 16 #define PTRACE_GETFPREGS 14 17 #define PTRACE_SETFPREGS 15 18 19 #define PTRACE_GETWMMXREGS 18 20 #define PTRACE_SETWMMXREGS 19 21 22 #define PTRACE_OLDSETOPTIONS 21 23 24 #define PTRACE_GET_THREAD_AREA 22 25 26 #define PTRACE_SET_SYSCALL 23 27 28 /* PTRACE_SYSCALL is 24 */ 29 30 #define PTRACE_GETCRUNCHREGS 25 31 #define PTRACE_SETCRUNCHREGS 26 32 #define PTRACE_GETVFPREGS 27 33 34 /* 35 * PSR bits 36 */ 37 #define USR26_MODE 0x00000000 38 #define FIQ26_MODE 0x00000001 39 #define IRQ26_MODE 0x00000002 40 #define SVC26_MODE 0x00000003 41 #define USR_MODE 0x00000010 42 #define FIQ_MODE 0x00000011 43 #define IRQ_MODE 0x00000012 44 #define SVC_MODE 0x00000013 45 #define ABT_MODE 0x00000017 46 #define UND_MODE 0x0000001b 47 #define SYSTEM_MODE 0x0000001f 48 #define MODE32_BIT 0x00000010 49 #define MODE_MASK 0x0000001f 50 #define PSR_T_BIT 0x00000020 51 #define PSR_F_BIT 0x00000040 52 #define PSR_I_BIT 0x00000080 53 #define PSR_J_BIT 0x01000000 54 #define PSR_Q_BIT 0x08000000 55 #define PSR_V_BIT 0x10000000 56 #define PSR_C_BIT 0x20000000 57 #define PSR_Z_BIT 0x40000000 58 #define PSR_N_BIT 0x80000000 59 #define PCMASK 0 60 61 /* 62 * Groups of PSR bits 63 */ 64 #define PSR_f 0xff000000 /* Flags */ 65 #define PSR_s 0x00ff0000 /* Status */ 66 #define PSR_x 0x0000ff00 /* Extension */ 67 #define PSR_c 0x000000ff /* Control */ 68 69 #ifndef __ASSEMBLY__ 70 71 /* 72 * This struct defines the way the registers are stored on the 73 * stack during a system call. Note that sizeof(struct pt_regs) 74 * has to be a multiple of 8. 75 */ 76 struct pt_regs { 77 long uregs[18]; 78 }; 79 80 #define ARM_cpsr uregs[16] 81 #define ARM_pc uregs[15] 82 #define ARM_lr uregs[14] 83 #define ARM_sp uregs[13] 84 #define ARM_ip uregs[12] 85 #define ARM_fp uregs[11] 86 #define ARM_r10 uregs[10] 87 #define ARM_r9 uregs[9] 88 #define ARM_r8 uregs[8] 89 #define ARM_r7 uregs[7] 90 #define ARM_r6 uregs[6] 91 #define ARM_r5 uregs[5] 92 #define ARM_r4 uregs[4] 93 #define ARM_r3 uregs[3] 94 #define ARM_r2 uregs[2] 95 #define ARM_r1 uregs[1] 96 #define ARM_r0 uregs[0] 97 #define ARM_ORIG_r0 uregs[17] 98 99 #ifdef __KERNEL__ 100 101 #define user_mode(regs) \ 102 (((regs)->ARM_cpsr & 0xf) == 0) 103 104 #ifdef CONFIG_ARM_THUMB 105 #define thumb_mode(regs) \ 106 (((regs)->ARM_cpsr & PSR_T_BIT)) 107 #else 108 #define thumb_mode(regs) (0) 109 #endif 110 111 #define processor_mode(regs) \ 112 ((regs)->ARM_cpsr & MODE_MASK) 113 114 #define interrupts_enabled(regs) \ 115 (!((regs)->ARM_cpsr & PSR_I_BIT)) 116 117 #define fast_interrupts_enabled(regs) \ 118 (!((regs)->ARM_cpsr & PSR_F_BIT)) 119 120 #define condition_codes(regs) \ 121 ((regs)->ARM_cpsr & (PSR_V_BIT|PSR_C_BIT|PSR_Z_BIT|PSR_N_BIT)) 122 123 /* Are the current registers suitable for user mode? 124 * (used to maintain security in signal handlers) 125 */ valid_user_regs(struct pt_regs * regs)126static inline int valid_user_regs(struct pt_regs *regs) 127 { 128 if (user_mode(regs) && 129 (regs->ARM_cpsr & (PSR_F_BIT|PSR_I_BIT)) == 0) 130 return 1; 131 132 /* 133 * Force CPSR to something logical... 134 */ 135 regs->ARM_cpsr &= PSR_f | PSR_s | PSR_x | PSR_T_BIT | MODE32_BIT; 136 137 return 0; 138 } 139 140 #endif /* __KERNEL__ */ 141 142 #define pc_pointer(v) \ 143 ((v) & ~PCMASK) 144 145 #define instruction_pointer(regs) \ 146 (pc_pointer((regs)->ARM_pc)) 147 148 #ifdef CONFIG_SMP 149 extern unsigned long profile_pc(struct pt_regs *regs); 150 #else 151 #define profile_pc(regs) instruction_pointer(regs) 152 #endif 153 154 #ifdef __KERNEL__ 155 #define predicate(x) ((x) & 0xf0000000) 156 #define PREDICATE_ALWAYS 0xe0000000 157 #endif 158 159 #endif /* __ASSEMBLY__ */ 160 161 #endif 162 163