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 41 struct 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 */ 91 static 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