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/*
* 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__
#define PTRACE_GET_THREAD_AREA 22
/*
* PSR bits
*/
#define USER_MODE 0x00000010
#define REAL_MODE 0x00000011
#define INTR_MODE 0x00000012
#define PRIV_MODE 0x00000013
#define ABRT_MODE 0x00000017
#define EXTN_MODE 0x0000001b
#define SUSR_MODE 0x0000001f
#define MODE_MASK 0x0000001f
#define PSR_R_BIT 0x00000040
#define PSR_I_BIT 0x00000080
#define PSR_V_BIT 0x10000000
#define PSR_C_BIT 0x20000000
#define PSR_Z_BIT 0x40000000
#define PSR_S_BIT 0x80000000
/*
* Groups of PSR bits
*/
#define PSR_f 0xff000000 /* Flags */
#define PSR_c 0x000000ff /* Control */
#ifndef __ASSEMBLY__
/*
* This struct defines the way the registers are stored on the
* stack during a system call. Note that sizeof(struct pt_regs)
* has to be a multiple of 8.
*/
struct pt_regs {
unsigned long uregs[34];
};
#define UCreg_asr uregs[32]
#define UCreg_pc uregs[31]
#define UCreg_lr uregs[30]
#define UCreg_sp uregs[29]
#define UCreg_ip uregs[28]
#define UCreg_fp uregs[27]
#define UCreg_26 uregs[26]
#define UCreg_25 uregs[25]
#define UCreg_24 uregs[24]
#define UCreg_23 uregs[23]
#define UCreg_22 uregs[22]
#define UCreg_21 uregs[21]
#define UCreg_20 uregs[20]
#define UCreg_19 uregs[19]
#define UCreg_18 uregs[18]
#define UCreg_17 uregs[17]
#define UCreg_16 uregs[16]
#define UCreg_15 uregs[15]
#define UCreg_14 uregs[14]
#define UCreg_13 uregs[13]
#define UCreg_12 uregs[12]
#define UCreg_11 uregs[11]
#define UCreg_10 uregs[10]
#define UCreg_09 uregs[9]
#define UCreg_08 uregs[8]
#define UCreg_07 uregs[7]
#define UCreg_06 uregs[6]
#define UCreg_05 uregs[5]
#define UCreg_04 uregs[4]
#define UCreg_03 uregs[3]
#define UCreg_02 uregs[2]
#define UCreg_01 uregs[1]
#define UCreg_00 uregs[0]
#define UCreg_ORIG_00 uregs[33]
#ifdef __KERNEL__
#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)
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */
#endif
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