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/* SPDX-License-Identifier: GPL-2.0-only */ /* * linux/arch/unicore32/include/asm/ptrace.h * * Code specific to PKUnity SoC and UniCore ISA * * Copyright (C) 2001-2010 GUAN Xue-tao */ #ifndef __UNICORE_PTRACE_H__ #define __UNICORE_PTRACE_H__ #include <uapi/asm/ptrace.h> #ifndef __ASSEMBLY__ #define user_mode(regs) \ (processor_mode(regs) == USER_MODE) #define processor_mode(regs) \ ((regs)->UCreg_asr & MODE_MASK) #define interrupts_enabled(regs) \ (!((regs)->UCreg_asr & PSR_I_BIT)) #define fast_interrupts_enabled(regs) \ (!((regs)->UCreg_asr & PSR_R_BIT)) /* Are the current registers suitable for user mode? * (used to maintain security in signal handlers) */ static inline int valid_user_regs(struct pt_regs *regs) { unsigned long mode = regs->UCreg_asr & MODE_MASK; /* * Always clear the R (REAL) bits */ regs->UCreg_asr &= ~(PSR_R_BIT); if ((regs->UCreg_asr & PSR_I_BIT) == 0) { if (mode == USER_MODE) return 1; } /* * Force ASR to something logical... */ regs->UCreg_asr &= PSR_f | USER_MODE; return 0; } #define instruction_pointer(regs) ((regs)->UCreg_pc) #define user_stack_pointer(regs) ((regs)->UCreg_sp) #define profile_pc(regs) instruction_pointer(regs) #endif /* __ASSEMBLY__ */ #endif