[GitHub/mt8127/android_kernel_alcatel_ttab.git] / 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 */

struct pt_regs {
	/*
	 * 1 word gutter after reg-file has been saved
	 * Technically not needed, Since SP always points to a "full" location
	 * (vs. "empty"). But pt_regs is shared with tools....
	 */
	long res;

	/* Real registers */
	long bta;	/* bta_l1, bta_l2, erbta */
	long lp_start;
	long lp_end;
	long lp_count;
	long status32;	/* status32_l1, status32_l2, erstatus */
	long ret;	/* ilink1, ilink2 or eret */
	long blink;
	long fp;
	long r26;	/* gp */
	long r12;
	long r11;
	long r10;
	long r9;
	long r8;
	long r7;
	long r6;
	long r5;
	long r4;
	long r3;
	long r2;
	long r1;
	long r0;
	long sp;	/* user/kernel sp depending on where we came from  */
	long orig_r0;

	/*to distinguish bet excp, syscall, irq */
	union {
		struct {
#ifdef CONFIG_CPU_BIG_ENDIAN
		/* so that assembly code is same for LE/BE */
		unsigned long orig_r8:16, event:16;
#else
		unsigned long event:16, orig_r8:16;
#endif
		};
		long orig_r8_word;
	};
};

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

struct callee_regs {
	long res;	/* Again this is not needed */
	long r25;
	long r24;
	long r23;
	long r22;
	long r21;
	long r20;
	long r19;
	long r18;
	long r17;
	long r16;
	long r15;
	long r14;
	long r13;
};

#define instruction_pointer(regs)	(unsigned long)((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->event & orig_r8_IS_SCALL)
#define in_brkpt_trap(regs) (regs->event & orig_r8_IS_BRKPT)

#define syscall_wont_restart(regs) (regs->event |= orig_r8_IS_SCALL_RESTARTED)
#define syscall_restartable(regs) !(regs->event &  orig_r8_IS_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 - 4) - 1;	\
})

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

#endif /* !__ASSEMBLY__ */

#define orig_r8_IS_SCALL		0x0001
#define orig_r8_IS_SCALL_RESTARTED	0x0002
#define orig_r8_IS_BRKPT		0x0004
#define orig_r8_IS_EXCPN		0x0008
#define orig_r8_IS_IRQ1			0x0010
#define orig_r8_IS_IRQ2			0x0020

#endif /* __ASM_PTRACE_H */
Commit	Line	Data
3be80aae VG	1	/*
	2	* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*
	8	* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
	9	*/
3be80aae VG	10	#ifndef __ASM_ARC_PTRACE_H
	11	#define __ASM_ARC_PTRACE_H
	12
8c2f4a8d	13	#include <uapi/asm/ptrace.h>
3be80aae VG	14
	15	#ifndef __ASSEMBLY__
	16
	17	/* THE pt_regs: Defines how regs are saved during entry into kernel */
	18
	19	struct pt_regs {
	20	/*
	21	* 1 word gutter after reg-file has been saved
	22	* Technically not needed, Since SP always points to a "full" location
	23	* (vs. "empty"). But pt_regs is shared with tools....
	24	*/
	25	long res;
	26
	27	/* Real registers */
	28	long bta; /* bta_l1, bta_l2, erbta */
	29	long lp_start;
	30	long lp_end;
	31	long lp_count;
	32	long status32; /* status32_l1, status32_l2, erstatus */
	33	long ret; /* ilink1, ilink2 or eret */
	34	long blink;
	35	long fp;
	36	long r26; /* gp */
	37	long r12;
	38	long r11;
	39	long r10;
	40	long r9;
	41	long r8;
	42	long r7;
	43	long r6;
	44	long r5;
	45	long r4;
	46	long r3;
	47	long r2;
	48	long r1;
	49	long r0;
	50	long sp; /* user/kernel sp depending on where we came from */
	51	long orig_r0;
5c39c0ab VG	52
	53	/to distinguish bet excp, syscall, irq /
	54	union {
9b2c750d	55	struct {
5c39c0ab VG	56	#ifdef CONFIG_CPU_BIG_ENDIAN
	57	/* so that assembly code is same for LE/BE */
	58	unsigned long orig_r8:16, event:16;
	59	#else
	60	unsigned long event:16, orig_r8:16;
	61	#endif
9b2c750d	62	};
5c39c0ab VG	63	long orig_r8_word;
5c39c0ab VG	64	};
3be80aae VG	65	};
	66
	67	/* Callee saved registers - need to be saved only when you are scheduled out */
	68
	69	struct callee_regs {
	70	long res; /* Again this is not needed */
	71	long r25;
	72	long r24;
	73	long r23;
	74	long r22;
	75	long r21;
	76	long r20;
	77	long r19;
	78	long r18;
	79	long r17;
	80	long r16;
	81	long r15;
	82	long r14;
	83	long r13;
	84	};
	85
508a750f	86	#define instruction_pointer(regs) (unsigned long)((regs)->ret)
3be80aae VG	87	#define profile_pc(regs) instruction_pointer(regs)
	88
	89	/* return 1 if user mode or 0 if kernel mode */
	90	#define user_mode(regs) (regs->status32 & STATUS_U_MASK)
	91
	92	#define user_stack_pointer(regs)\
	93	({ unsigned int sp; \
	94	if (user_mode(regs)) \
	95	sp = (regs)->sp;\
	96	else \
	97	sp = -1; \
	98	sp; \
	99	})
4adeefe1	100
2e651ea1 VG	101	/* return 1 if PC in delay slot */
	102	#define delay_mode(regs) ((regs->status32 & STATUS_DE_MASK) == STATUS_DE_MASK)
	103
5c39c0ab VG	104	#define in_syscall(regs) (regs->event & orig_r8_IS_SCALL)
5c39c0ab VG	105	#define in_brkpt_trap(regs) (regs->event & orig_r8_IS_BRKPT)
4adeefe1	106
55bb9480 VG	107	#define syscall_wont_restart(regs) (regs->event \|= orig_r8_IS_SCALL_RESTARTED)
	108	#define syscall_restartable(regs) !(regs->event & orig_r8_IS_SCALL_RESTARTED)
	109
bf90e1ea VG	110	#define current_pt_regs() \
	111	({ \
	112	/* open-coded current_thread_info() */ \
	113	register unsigned long sp asm ("sp"); \
	114	unsigned long pg_start = (sp & ~(THREAD_SIZE - 1)); \
	115	(struct pt_regs *)(pg_start + THREAD_SIZE - 4) - 1; \
	116	})
	117
4d86dfbb VG	118	static inline long regs_return_value(struct pt_regs *regs)
	119	{
	120	return regs->r0;
	121	}
	122
3be80aae VG	123	#endif /* !__ASSEMBLY__ */
3be80aae VG	124
5c39c0ab VG	125	#define orig_r8_IS_SCALL 0x0001
	126	#define orig_r8_IS_SCALL_RESTARTED 0x0002
	127	#define orig_r8_IS_BRKPT 0x0004
367f3fcd	128	#define orig_r8_IS_EXCPN 0x0008
5c39c0ab VG	129	#define orig_r8_IS_IRQ1 0x0010
	130	#define orig_r8_IS_IRQ2 0x0020
	131
3be80aae	132	#endif /* __ASM_PTRACE_H */