1 /* 2 * linux/arch/unicore32/include/asm/ptrace.h 3 * 4 * Code specific to PKUnity SoC and UniCore ISA 5 * 6 * Copyright (C) 2001-2010 GUAN Xue-tao 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 #ifndef __UNICORE_PTRACE_H__ 13 #define __UNICORE_PTRACE_H__ 14 15 #include <uapi/asm/ptrace.h> 16 17 #ifndef __ASSEMBLY__ 18 19 #define user_mode(regs) \ 20 (processor_mode(regs) == USER_MODE) 21 22 #define processor_mode(regs) \ 23 ((regs)->UCreg_asr & MODE_MASK) 24 25 #define interrupts_enabled(regs) \ 26 (!((regs)->UCreg_asr & PSR_I_BIT)) 27 28 #define fast_interrupts_enabled(regs) \ 29 (!((regs)->UCreg_asr & PSR_R_BIT)) 30 31 /* Are the current registers suitable for user mode? 32 * (used to maintain security in signal handlers) 33 */ valid_user_regs(struct pt_regs * regs)34static inline int valid_user_regs(struct pt_regs *regs) 35 { 36 unsigned long mode = regs->UCreg_asr & MODE_MASK; 37 38 /* 39 * Always clear the R (REAL) bits 40 */ 41 regs->UCreg_asr &= ~(PSR_R_BIT); 42 43 if ((regs->UCreg_asr & PSR_I_BIT) == 0) { 44 if (mode == USER_MODE) 45 return 1; 46 } 47 48 /* 49 * Force ASR to something logical... 50 */ 51 regs->UCreg_asr &= PSR_f | USER_MODE; 52 53 return 0; 54 } 55 56 #define instruction_pointer(regs) ((regs)->UCreg_pc) 57 #define user_stack_pointer(regs) ((regs)->UCreg_sp) 58 #define profile_pc(regs) instruction_pointer(regs) 59 60 #endif /* __ASSEMBLY__ */ 61 #endif 62