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-rw-r--r--arch/arc/include/asm/module.h7
-rw-r--r--arch/arc/include/asm/unwind.h163
2 files changed, 170 insertions, 0 deletions
diff --git a/arch/arc/include/asm/module.h b/arch/arc/include/asm/module.h
index 234b4354e2b3..518222bb3f8e 100644
--- a/arch/arc/include/asm/module.h
+++ b/arch/arc/include/asm/module.h
@@ -14,6 +14,13 @@
14 14
15#include <asm-generic/module.h> 15#include <asm-generic/module.h>
16 16
17#ifdef CONFIG_ARC_DW2_UNWIND
18struct mod_arch_specific {
19 void *unw_info;
20 int unw_sec_idx;
21};
22#endif
23
17#define MODULE_PROC_FAMILY "ARC700" 24#define MODULE_PROC_FAMILY "ARC700"
18 25
19#define MODULE_ARCH_VERMAGIC MODULE_PROC_FAMILY 26#define MODULE_ARCH_VERMAGIC MODULE_PROC_FAMILY
diff --git a/arch/arc/include/asm/unwind.h b/arch/arc/include/asm/unwind.h
new file mode 100644
index 000000000000..7ca628b6ee2a
--- /dev/null
+++ b/arch/arc/include/asm/unwind.h
@@ -0,0 +1,163 @@
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
9#ifndef _ASM_ARC_UNWIND_H
10#define _ASM_ARC_UNWIND_H
11
12#ifdef CONFIG_ARC_DW2_UNWIND
13
14#include <linux/sched.h>
15
16struct arc700_regs {
17 unsigned long r0;
18 unsigned long r1;
19 unsigned long r2;
20 unsigned long r3;
21 unsigned long r4;
22 unsigned long r5;
23 unsigned long r6;
24 unsigned long r7;
25 unsigned long r8;
26 unsigned long r9;
27 unsigned long r10;
28 unsigned long r11;
29 unsigned long r12;
30 unsigned long r13;
31 unsigned long r14;
32 unsigned long r15;
33 unsigned long r16;
34 unsigned long r17;
35 unsigned long r18;
36 unsigned long r19;
37 unsigned long r20;
38 unsigned long r21;
39 unsigned long r22;
40 unsigned long r23;
41 unsigned long r24;
42 unsigned long r25;
43 unsigned long r26;
44 unsigned long r27; /* fp */
45 unsigned long r28; /* sp */
46 unsigned long r29;
47 unsigned long r30;
48 unsigned long r31; /* blink */
49 unsigned long r63; /* pc */
50};
51
52struct unwind_frame_info {
53 struct arc700_regs regs;
54 struct task_struct *task;
55 unsigned call_frame:1;
56};
57
58#define UNW_PC(frame) ((frame)->regs.r63)
59#define UNW_SP(frame) ((frame)->regs.r28)
60#define UNW_BLINK(frame) ((frame)->regs.r31)
61
62/* Rajesh FIXME */
63#ifdef CONFIG_FRAME_POINTER
64#define UNW_FP(frame) ((frame)->regs.r27)
65#define FRAME_RETADDR_OFFSET 4
66#define FRAME_LINK_OFFSET 0
67#define STACK_BOTTOM_UNW(tsk) STACK_LIMIT((tsk)->thread.ksp)
68#define STACK_TOP_UNW(tsk) ((tsk)->thread.ksp)
69#else
70#define UNW_FP(frame) ((void)(frame), 0)
71#endif
72
73#define STACK_LIMIT(ptr) (((ptr) - 1) & ~(THREAD_SIZE - 1))
74
75#define UNW_REGISTER_INFO \
76 PTREGS_INFO(r0), \
77 PTREGS_INFO(r1), \
78 PTREGS_INFO(r2), \
79 PTREGS_INFO(r3), \
80 PTREGS_INFO(r4), \
81 PTREGS_INFO(r5), \
82 PTREGS_INFO(r6), \
83 PTREGS_INFO(r7), \
84 PTREGS_INFO(r8), \
85 PTREGS_INFO(r9), \
86 PTREGS_INFO(r10), \
87 PTREGS_INFO(r11), \
88 PTREGS_INFO(r12), \
89 PTREGS_INFO(r13), \
90 PTREGS_INFO(r14), \
91 PTREGS_INFO(r15), \
92 PTREGS_INFO(r16), \
93 PTREGS_INFO(r17), \
94 PTREGS_INFO(r18), \
95 PTREGS_INFO(r19), \
96 PTREGS_INFO(r20), \
97 PTREGS_INFO(r21), \
98 PTREGS_INFO(r22), \
99 PTREGS_INFO(r23), \
100 PTREGS_INFO(r24), \
101 PTREGS_INFO(r25), \
102 PTREGS_INFO(r26), \
103 PTREGS_INFO(r27), \
104 PTREGS_INFO(r28), \
105 PTREGS_INFO(r29), \
106 PTREGS_INFO(r30), \
107 PTREGS_INFO(r31), \
108 PTREGS_INFO(r63)
109
110#define UNW_DEFAULT_RA(raItem, dataAlign) \
111 ((raItem).where == Memory && !((raItem).value * (dataAlign) + 4))
112
113extern int arc_unwind(struct unwind_frame_info *frame);
114extern void arc_unwind_init(void);
115extern void arc_unwind_setup(void);
116extern void *unwind_add_table(struct module *module, const void *table_start,
117 unsigned long table_size);
118extern void unwind_remove_table(void *handle, int init_only);
119
120static inline int
121arch_unwind_init_running(struct unwind_frame_info *info,
122 int (*callback) (struct unwind_frame_info *info,
123 void *arg),
124 void *arg)
125{
126 return 0;
127}
128
129static inline int arch_unw_user_mode(const struct unwind_frame_info *info)
130{
131 return 0;
132}
133
134static inline void arch_unw_init_blocked(struct unwind_frame_info *info)
135{
136 return;
137}
138
139static inline void arch_unw_init_frame_info(struct unwind_frame_info *info,
140 struct pt_regs *regs)
141{
142 return;
143}
144
145#else
146
147#define UNW_PC(frame) ((void)(frame), 0)
148#define UNW_SP(frame) ((void)(frame), 0)
149#define UNW_FP(frame) ((void)(frame), 0)
150
151static inline void arc_unwind_init(void)
152{
153}
154
155static inline void arc_unwind_setup(void)
156{
157}
158#define unwind_add_table(a, b, c)
159#define unwind_remove_table(a, b)
160
161#endif /* CONFIG_ARC_DW2_UNWIND */
162
163#endif /* _ASM_ARC_UNWIND_H */
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