61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
/*
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* linux/arch/unicore32/include/asm/ptrace.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __UNICORE_PTRACE_H__
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#define __UNICORE_PTRACE_H__
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#include <uapi/asm/ptrace.h>
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#ifndef __ASSEMBLY__
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#define user_mode(regs) \
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(processor_mode(regs) == USER_MODE)
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#define processor_mode(regs) \
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((regs)->UCreg_asr & MODE_MASK)
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#define interrupts_enabled(regs) \
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(!((regs)->UCreg_asr & PSR_I_BIT))
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#define fast_interrupts_enabled(regs) \
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(!((regs)->UCreg_asr & PSR_R_BIT))
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/* Are the current registers suitable for user mode?
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* (used to maintain security in signal handlers)
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*/
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static inline int valid_user_regs(struct pt_regs *regs)
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{
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unsigned long mode = regs->UCreg_asr & MODE_MASK;
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/*
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* Always clear the R (REAL) bits
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*/
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regs->UCreg_asr &= ~(PSR_R_BIT);
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if ((regs->UCreg_asr & PSR_I_BIT) == 0) {
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if (mode == USER_MODE)
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return 1;
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}
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/*
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* Force ASR to something logical...
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*/
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regs->UCreg_asr &= PSR_f | USER_MODE;
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return 0;
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}
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#define instruction_pointer(regs) ((regs)->UCreg_pc)
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#define user_stack_pointer(regs) ((regs)->UCreg_sp)
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#endif /* __ASSEMBLY__ */
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#endif
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