1 /* 2 * arch/arm/include/asm/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 <asm/hwcap.h> 14 15 #define PTRACE_GETREGS 12 16 #define PTRACE_SETREGS 13 17 #define PTRACE_GETFPREGS 14 18 #define PTRACE_SETFPREGS 15 19 /* PTRACE_ATTACH is 16 */ 20 /* PTRACE_DETACH is 17 */ 21 #define PTRACE_GETWMMXREGS 18 22 #define PTRACE_SETWMMXREGS 19 23 /* 20 is unused */ 24 #define PTRACE_OLDSETOPTIONS 21 25 #define PTRACE_GET_THREAD_AREA 22 26 #define PTRACE_SET_SYSCALL 23 27 /* PTRACE_SYSCALL is 24 */ 28 #define PTRACE_GETCRUNCHREGS 25 29 #define PTRACE_SETCRUNCHREGS 26 30 31 /* 32 * PSR bits 33 */ 34 #define USR26_MODE 0x00000000 35 #define FIQ26_MODE 0x00000001 36 #define IRQ26_MODE 0x00000002 37 #define SVC26_MODE 0x00000003 38 #define USR_MODE 0x00000010 39 #define FIQ_MODE 0x00000011 40 #define IRQ_MODE 0x00000012 41 #define SVC_MODE 0x00000013 42 #define ABT_MODE 0x00000017 43 #define UND_MODE 0x0000001b 44 #define SYSTEM_MODE 0x0000001f 45 #define MODE32_BIT 0x00000010 46 #define MODE_MASK 0x0000001f 47 #define PSR_T_BIT 0x00000020 48 #define PSR_F_BIT 0x00000040 49 #define PSR_I_BIT 0x00000080 50 #define PSR_A_BIT 0x00000100 51 #define PSR_J_BIT 0x01000000 52 #define PSR_Q_BIT 0x08000000 53 #define PSR_V_BIT 0x10000000 54 #define PSR_C_BIT 0x20000000 55 #define PSR_Z_BIT 0x40000000 56 #define PSR_N_BIT 0x80000000 57 #define PCMASK 0 58 59 /* 60 * Groups of PSR bits 61 */ 62 #define PSR_f 0xff000000 /* Flags */ 63 #define PSR_s 0x00ff0000 /* Status */ 64 #define PSR_x 0x0000ff00 /* Extension */ 65 #define PSR_c 0x000000ff /* Control */ 66 67 #ifndef __ASSEMBLY__ 68 69 /* 70 * This struct defines the way the registers are stored on the 71 * stack during a system call. Note that sizeof(struct pt_regs) 72 * has to be a multiple of 8. 73 */ 74 struct pt_regs { 75 long uregs[18]; 76 }; 77 78 #define ARM_cpsr uregs[16] 79 #define ARM_pc uregs[15] 80 #define ARM_lr uregs[14] 81 #define ARM_sp uregs[13] 82 #define ARM_ip uregs[12] 83 #define ARM_fp uregs[11] 84 #define ARM_r10 uregs[10] 85 #define ARM_r9 uregs[9] 86 #define ARM_r8 uregs[8] 87 #define ARM_r7 uregs[7] 88 #define ARM_r6 uregs[6] 89 #define ARM_r5 uregs[5] 90 #define ARM_r4 uregs[4] 91 #define ARM_r3 uregs[3] 92 #define ARM_r2 uregs[2] 93 #define ARM_r1 uregs[1] 94 #define ARM_r0 uregs[0] 95 #define ARM_ORIG_r0 uregs[17] 96 97 #ifdef __KERNEL__ 98 99 #define user_mode(regs) \ 100 (((regs)->ARM_cpsr & 0xf) == 0) 101 102 #ifdef CONFIG_ARM_THUMB 103 #define thumb_mode(regs) \ 104 (((regs)->ARM_cpsr & PSR_T_BIT)) 105 #else 106 #define thumb_mode(regs) (0) 107 #endif 108 109 #define isa_mode(regs) \ 110 ((((regs)->ARM_cpsr & PSR_J_BIT) >> 23) | \ 111 (((regs)->ARM_cpsr & PSR_T_BIT) >> 5)) 112 113 #define processor_mode(regs) \ 114 ((regs)->ARM_cpsr & MODE_MASK) 115 116 #define interrupts_enabled(regs) \ 117 (!((regs)->ARM_cpsr & PSR_I_BIT)) 118 119 #define fast_interrupts_enabled(regs) \ 120 (!((regs)->ARM_cpsr & PSR_F_BIT)) 121 122 /* Are the current registers suitable for user mode? 123 * (used to maintain security in signal handlers) 124 */ 125 static inline int valid_user_regs(struct pt_regs *regs) 126 { 127 if (user_mode(regs) && (regs->ARM_cpsr & PSR_I_BIT) == 0) { 128 regs->ARM_cpsr &= ~(PSR_F_BIT | PSR_A_BIT); 129 return 1; 130 } 131 132 /* 133 * Force CPSR to something logical... 134 */ 135 regs->ARM_cpsr &= PSR_f | PSR_s | (PSR_x & ~PSR_A_BIT) | PSR_T_BIT | MODE32_BIT; 136 if (!(elf_hwcap & HWCAP_26BIT)) 137 regs->ARM_cpsr |= USR_MODE; 138 139 return 0; 140 } 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 #define predicate(x) ((x) & 0xf0000000) 155 #define PREDICATE_ALWAYS 0xe0000000 156 157 #endif /* __KERNEL__ */ 158 159 #endif /* __ASSEMBLY__ */ 160 161 #endif 162 163