Release 4.14 arch/arc/include/asm/ptrace.h

/*
 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
 *
 * 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.
 *
 * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
 */
#ifndef __ASM_ARC_PTRACE_H

#define __ASM_ARC_PTRACE_H

#include <uapi/asm/ptrace.h>

#ifndef __ASSEMBLY__

/* THE pt_regs: Defines how regs are saved during entry into kernel */

#ifdef CONFIG_ISA_ARCOMPACT

struct pt_regs {

#ifdef CONFIG_ARC_PLAT_EZNPS
	
unsigned long eflags;	/* Extended FLAGS */
	
unsigned long gpa1;	/* General Purpose Aux */
#endif

	/* Real registers */
	
unsigned long bta;	/* bta_l1, bta_l2, erbta */

	


unsigned long lp_start, lp_end, lp_count;

	
unsigned long status32;	/* status32_l1, status32_l2, erstatus */
	
unsigned long ret;	/* ilink1, ilink2 or eret */
	
unsigned long blink;
	
unsigned long fp;
	
unsigned long r26;	/* gp */

	












unsigned long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;

	
unsigned long sp;	/* User/Kernel depending on where we came from */
	
unsigned long orig_r0;

	/*
         * To distinguish bet excp, syscall, irq
         * For traps and exceptions, Exception Cause Register.
         *      ECR: <00> <VV> <CC> <PP>
         *      Last word used by Linux for extra state mgmt (syscall-restart)
         * For interrupts, use artificial ECR values to note current prio-level
         */
	union {
		struct {
#ifdef CONFIG_CPU_BIG_ENDIAN
			

unsigned long state:8, ecr_vec:8,
				      

ecr_cause:8, ecr_param:8;
#else
			unsigned long ecr_param:8, ecr_cause:8,
				      ecr_vec:8, state:8;
#endif
		};
		
unsigned long event;
	};

	
unsigned long user_r25;
};
#else


struct pt_regs {

	
unsigned long orig_r0;

	union {
		struct {
#ifdef CONFIG_CPU_BIG_ENDIAN
			

unsigned long state:8, ecr_vec:8,
				      

ecr_cause:8, ecr_param:8;
#else
			unsigned long ecr_param:8, ecr_cause:8,
				      ecr_vec:8, state:8;
#endif
		};
		
unsigned long event;
	};

	
unsigned long bta;	/* bta_l1, bta_l2, erbta */

	
unsigned long user_r25;

	
unsigned long r26;	/* gp */
	
unsigned long fp;
	
unsigned long sp;	/* user/kernel sp depending on where we came from  */

	

unsigned long r12, r30;

#ifdef CONFIG_ARC_HAS_ACCL_REGS
	

unsigned long r58, r59;	/* ACCL/ACCH used by FPU / DSP MPY */
#endif

	/*------- Below list auto saved by h/w -----------*/
	











unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;

	
unsigned long blink;
	


unsigned long lp_end, lp_start, lp_count;

	


unsigned long ei, ldi, jli;

	
unsigned long ret;
	
unsigned long status32;
};

#endif

/* Callee saved registers - need to be saved only when you are scheduled out */


struct callee_regs {
	












unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13;
};


#define instruction_pointer(regs)	((regs)->ret)

#define profile_pc(regs)		instruction_pointer(regs)

/* return 1 if user mode or 0 if kernel mode */

#define user_mode(regs) (regs->status32 & STATUS_U_MASK)


#define user_stack_pointer(regs)\
({  unsigned int sp;            \
        if (user_mode(regs))    \
                sp = (regs)->sp;\
        else                    \
                sp = -1;        \
        sp;                     \
})

/* return 1 if PC in delay slot */

#define delay_mode(regs) ((regs->status32 & STATUS_DE_MASK) == STATUS_DE_MASK)


#define in_syscall(regs)    ((regs->ecr_vec == ECR_V_TRAP) && !regs->ecr_param)

#define in_brkpt_trap(regs) ((regs->ecr_vec == ECR_V_TRAP) && regs->ecr_param)


#define STATE_SCALL_RESTARTED	0x01


#define syscall_wont_restart(reg) (reg->state |= STATE_SCALL_RESTARTED)

#define syscall_restartable(reg) !(reg->state &  STATE_SCALL_RESTARTED)


#define current_pt_regs()					\
({                                                              \
	/* open-coded current_thread_info() */			\
        register unsigned long sp asm ("sp");                   \
        unsigned long pg_start = (sp & ~(THREAD_SIZE - 1));     \
        (struct pt_regs *)(pg_start + THREAD_SIZE) - 1; \
})



static inline long regs_return_value(struct pt_regs *regs)
{
	return (long)regs->r0;
}

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#endif /* !__ASSEMBLY__ */

#endif /* __ASM_PTRACE_H */
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Directory: arch/arc/include/asm

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