aboutsummaryrefslogtreecommitdiff
path: root/arch/avr32/include/asm/ptrace.h
blob: 9e2d44f4e0fe9f7b358758d9babfc7443cea2e7b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
/*
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * 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 __ASM_AVR32_PTRACE_H
#define __ASM_AVR32_PTRACE_H

#define PTRACE_GETREGS		12
#define PTRACE_SETREGS		13

/*
 * Status Register bits
 */
#define SR_H		0x20000000
#define SR_J		0x10000000
#define SR_DM		0x08000000
#define SR_D		0x04000000
#define MODE_NMI	0x01c00000
#define MODE_EXCEPTION	0x01800000
#define MODE_INT3	0x01400000
#define MODE_INT2	0x01000000
#define MODE_INT1	0x00c00000
#define MODE_INT0	0x00800000
#define MODE_SUPERVISOR	0x00400000
#define MODE_USER	0x00000000
#define MODE_MASK	0x01c00000
#define SR_EM		0x00200000
#define SR_I3M		0x00100000
#define SR_I2M		0x00080000
#define SR_I1M		0x00040000
#define SR_I0M		0x00020000
#define SR_GM		0x00010000

#define SR_H_BIT	29
#define SR_J_BIT	28
#define SR_DM_BIT	27
#define SR_D_BIT	26
#define MODE_SHIFT	22
#define SR_EM_BIT	21
#define SR_I3M_BIT	20
#define SR_I2M_BIT	19
#define SR_I1M_BIT	18
#define SR_I0M_BIT	17
#define SR_GM_BIT	16

/* The user-visible part */
#define SR_L		0x00000020
#define SR_Q		0x00000010
#define SR_V		0x00000008
#define SR_N		0x00000004
#define SR_Z		0x00000002
#define SR_C		0x00000001

#define SR_L_BIT	5
#define SR_Q_BIT	4
#define SR_V_BIT	3
#define SR_N_BIT	2
#define SR_Z_BIT	1
#define SR_C_BIT	0

/*
 * The order is defined by the stmts instruction. r0 is stored first,
 * so it gets the highest address.
 *
 * Registers 0-12 are general-purpose registers (r12 is normally used for
 * the function return value).
 * Register 13 is the stack pointer
 * Register 14 is the link register
 * Register 15 is the program counter (retrieved from the RAR sysreg)
 */
#define FRAME_SIZE_FULL 72
#define REG_R12_ORIG	68
#define REG_R0		64
#define REG_R1		60
#define REG_R2		56
#define REG_R3		52
#define REG_R4		48
#define REG_R5		44
#define REG_R6		40
#define REG_R7		36
#define REG_R8		32
#define REG_R9		28
#define REG_R10		24
#define REG_R11		20
#define REG_R12		16
#define REG_SP		12
#define REG_LR		 8

#define FRAME_SIZE_MIN	 8
#define REG_PC		 4
#define REG_SR		 0

#ifndef __ASSEMBLY__
struct pt_regs {
	/* These are always saved */
	unsigned long sr;
	unsigned long pc;

	/* These are sometimes saved */
	unsigned long lr;
	unsigned long sp;
	unsigned long r12;
	unsigned long r11;
	unsigned long r10;
	unsigned long r9;
	unsigned long r8;
	unsigned long r7;
	unsigned long r6;
	unsigned long r5;
	unsigned long r4;
	unsigned long r3;
	unsigned long r2;
	unsigned long r1;
	unsigned long r0;

	/* Only saved on system call */
	unsigned long r12_orig;
};

#ifdef __KERNEL__

#include <asm/ocd.h>

#define arch_ptrace_attach(child)       ocd_enable(child)

#define user_mode(regs)                 (((regs)->sr & MODE_MASK) == MODE_USER)
#define instruction_pointer(regs)       ((regs)->pc)
#define profile_pc(regs)                instruction_pointer(regs)

extern void show_regs (struct pt_regs *);

static __inline__ int valid_user_regs(struct pt_regs *regs)
{
	/*
	 * Some of the Java bits might be acceptable if/when we
	 * implement some support for that stuff...
	 */
	if ((regs->sr & 0xffff0000) == 0)
		return 1;

	/*
	 * Force status register flags to be sane and report this
	 * illegal behaviour...
	 */
	regs->sr &= 0x0000ffff;
	return 0;
}


#endif /* __KERNEL__ */

#endif /* ! __ASSEMBLY__ */

#endif /* __ASM_AVR32_PTRACE_H */