1 /* 1
2 * This file is subject to the terms and condi
3 * License. See the file "COPYING" in the mai
4 * more details.
5 *
6 * Copyright (C) 2009 DSLab, Lanzhou Universit
7 * Author: Wu Zhangjin <wuzhangjin@gmail.com>
8 */
9
10 #ifndef _ASM_MIPS_FTRACE_H
11 #define _ASM_MIPS_FTRACE_H
12
13 #ifdef CONFIG_FUNCTION_TRACER
14
15 #define MCOUNT_ADDR ((unsigned long)(_mcount))
16 #define MCOUNT_INSN_SIZE 4 /* siz
17
18 #ifndef __ASSEMBLY__
19 extern void _mcount(void);
20 #define mcount _mcount
21
22 #define safe_load(load, src, dst, error)
23 do {
24 asm volatile (
25 "1: " load " %[tmp_dst], 0(%[t
26 " li %[tmp_err], 0\n"
27 "2: .insn\n"
28
29 ".section .fixup, \"ax\"\n"
30 "3: li %[tmp_err], 1\n"
31 " j 2b\n"
32 ".previous\n"
33
34 ".section\t__ex_table,\"a\"\n\
35 STR(PTR_WD) "\t1b, 3b\n\t"
36 ".previous\n"
37
38 : [tmp_dst] "=&r" (dst), [tmp_
39 : [tmp_src] "r" (src)
40 : "memory"
41 );
42 } while (0)
43
44 #define safe_store(store, src, dst, error)
45 do {
46 asm volatile (
47 "1: " store " %[tmp_src], 0(%[
48 " li %[tmp_err], 0\n"
49 "2: .insn\n"
50
51 ".section .fixup, \"ax\"\n"
52 "3: li %[tmp_err], 1\n"
53 " j 2b\n"
54 ".previous\n"
55
56 ".section\t__ex_table,\"a\"\n\
57 STR(PTR_WD) "\t1b, 3b\n\t"
58 ".previous\n"
59
60 : [tmp_err] "=r" (error)
61 : [tmp_dst] "r" (dst), [tmp_sr
62 : "memory"
63 );
64 } while (0)
65
66 #define safe_load_code(dst, src, error) \
67 safe_load(STR(lw), src, dst, error)
68 #define safe_store_code(src, dst, error) \
69 safe_store(STR(sw), src, dst, error)
70
71 #define safe_load_stack(dst, src, error) \
72 safe_load(STR(PTR_L), src, dst, error)
73
74 #define safe_store_stack(src, dst, error) \
75 safe_store(STR(PTR_S), src, dst, error
76
77
78 #ifdef CONFIG_DYNAMIC_FTRACE
79 static inline unsigned long ftrace_call_adjust
80 {
81 return addr;
82 }
83
84 struct dyn_arch_ftrace {
85 };
86
87 #endif /* CONFIG_DYNAMIC_FTRACE */
88
89 void prepare_ftrace_return(unsigned long *pare
90 unsigned long fp);
91
92 #endif /* __ASSEMBLY__ */
93 #endif /* CONFIG_FUNCTION_TRACER */
94 #endif /* _ASM_MIPS_FTRACE_H */
95
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