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 #ifdef CONFIG_ARM64 14 15 #define PCMASK 0 16 17 #ifndef __ASSEMBLY__ 18 19 /* 20 * This struct defines the way the registers are stored 21 * on the stack during an exception. 22 */ 23 struct pt_regs { 24 unsigned long elr; 25 unsigned long regs[31]; 26 }; 27 28 #endif /* __ASSEMBLY__ */ 29 30 #else /* CONFIG_ARM64 */ 31 32 #define USR26_MODE 0x00 33 #define FIQ26_MODE 0x01 34 #define IRQ26_MODE 0x02 35 #define SVC26_MODE 0x03 36 #define USR_MODE 0x10 37 #define FIQ_MODE 0x11 38 #define IRQ_MODE 0x12 39 #define SVC_MODE 0x13 40 #define ABT_MODE 0x17 41 #define HYP_MODE 0x1a 42 #define UND_MODE 0x1b 43 #define SYSTEM_MODE 0x1f 44 #define MODE_MASK 0x1f 45 #define T_BIT 0x20 46 #define F_BIT 0x40 47 #define I_BIT 0x80 48 #define A_BIT 0x100 49 #define CC_V_BIT (1 << 28) 50 #define CC_C_BIT (1 << 29) 51 #define CC_Z_BIT (1 << 30) 52 #define CC_N_BIT (1 << 31) 53 #define PCMASK 0 54 55 #ifndef __ASSEMBLY__ 56 57 /* this struct defines the way the registers are stored on the 58 stack during a system call. */ 59 60 struct pt_regs { 61 long uregs[18]; 62 }; 63 64 #define ARM_cpsr uregs[16] 65 #define ARM_pc uregs[15] 66 #define ARM_lr uregs[14] 67 #define ARM_sp uregs[13] 68 #define ARM_ip uregs[12] 69 #define ARM_fp uregs[11] 70 #define ARM_r10 uregs[10] 71 #define ARM_r9 uregs[9] 72 #define ARM_r8 uregs[8] 73 #define ARM_r7 uregs[7] 74 #define ARM_r6 uregs[6] 75 #define ARM_r5 uregs[5] 76 #define ARM_r4 uregs[4] 77 #define ARM_r3 uregs[3] 78 #define ARM_r2 uregs[2] 79 #define ARM_r1 uregs[1] 80 #define ARM_r0 uregs[0] 81 #define ARM_ORIG_r0 uregs[17] 82 83 #ifdef __KERNEL__ 84 85 #define user_mode(regs) \ 86 (((regs)->ARM_cpsr & 0xf) == 0) 87 88 #ifdef CONFIG_ARM_THUMB 89 #define thumb_mode(regs) \ 90 (((regs)->ARM_cpsr & T_BIT)) 91 #else 92 #define thumb_mode(regs) (0) 93 #endif 94 95 #define processor_mode(regs) \ 96 ((regs)->ARM_cpsr & MODE_MASK) 97 98 #define interrupts_enabled(regs) \ 99 (!((regs)->ARM_cpsr & I_BIT)) 100 101 #define fast_interrupts_enabled(regs) \ 102 (!((regs)->ARM_cpsr & F_BIT)) 103 104 #define condition_codes(regs) \ 105 ((regs)->ARM_cpsr & (CC_V_BIT|CC_C_BIT|CC_Z_BIT|CC_N_BIT)) 106 107 /* Are the current registers suitable for user mode? 108 * (used to maintain security in signal handlers) 109 */ 110 static inline int valid_user_regs(struct pt_regs *regs) 111 { 112 if ((regs->ARM_cpsr & 0xf) == 0 && 113 (regs->ARM_cpsr & (F_BIT|I_BIT)) == 0) 114 return 1; 115 116 /* 117 * Force CPSR to something logical... 118 */ 119 regs->ARM_cpsr &= (CC_V_BIT|CC_C_BIT|CC_Z_BIT|CC_N_BIT|0x10); 120 121 return 0; 122 } 123 124 #endif /* __KERNEL__ */ 125 126 #endif /* __ASSEMBLY__ */ 127 128 #endif /* CONFIG_ARM64 */ 129 130 #endif 131