1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * linux/arch/unicore32/include/asm/ptrace.h 4 * 5 * Code specific to PKUnity SoC and UniCore ISA 6 * 7 * Copyright (C) 2001-2010 GUAN Xue-tao 8 */ 9 #ifndef __UNICORE_PTRACE_H__ 10 #define __UNICORE_PTRACE_H__ 11 12 #include <uapi/asm/ptrace.h> 13 14 #ifndef __ASSEMBLY__ 15 16 #define user_mode(regs) \ 17 (processor_mode(regs) == USER_MODE) 18 19 #define processor_mode(regs) \ 20 ((regs)->UCreg_asr & MODE_MASK) 21 22 #define interrupts_enabled(regs) \ 23 (!((regs)->UCreg_asr & PSR_I_BIT)) 24 25 #define fast_interrupts_enabled(regs) \ 26 (!((regs)->UCreg_asr & PSR_R_BIT)) 27 28 /* Are the current registers suitable for user mode? 29 * (used to maintain security in signal handlers) 30 */ valid_user_regs(struct pt_regs * regs)31static inline int valid_user_regs(struct pt_regs *regs) 32 { 33 unsigned long mode = regs->UCreg_asr & MODE_MASK; 34 35 /* 36 * Always clear the R (REAL) bits 37 */ 38 regs->UCreg_asr &= ~(PSR_R_BIT); 39 40 if ((regs->UCreg_asr & PSR_I_BIT) == 0) { 41 if (mode == USER_MODE) 42 return 1; 43 } 44 45 /* 46 * Force ASR to something logical... 47 */ 48 regs->UCreg_asr &= PSR_f | USER_MODE; 49 50 return 0; 51 } 52 53 #define instruction_pointer(regs) ((regs)->UCreg_pc) 54 #define user_stack_pointer(regs) ((regs)->UCreg_sp) 55 #define profile_pc(regs) instruction_pointer(regs) 56 57 #endif /* __ASSEMBLY__ */ 58 #endif 59