diff options
Diffstat (limited to 'arch/unicore32/include/asm/ptrace.h')
| -rw-r--r-- | arch/unicore32/include/asm/ptrace.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/unicore32/include/asm/ptrace.h b/arch/unicore32/include/asm/ptrace.h new file mode 100644 index 000000000..02bf5a415 --- /dev/null +++ b/arch/unicore32/include/asm/ptrace.h @@ -0,0 +1,61 @@ +/* + * linux/arch/unicore32/include/asm/ptrace.h + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#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 |