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Wu Zhangjind2bb0762009-11-20 20:34:29 +08001/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive for
4 * more details.
5 *
6 * Copyright (C) 2009 DSLab, Lanzhou University, China
Wu Zhangjinf7a904d2010-01-04 17:16:51 +08007 * Author: Wu Zhangjin <wuzhangjin@gmail.com>
Wu Zhangjind2bb0762009-11-20 20:34:29 +08008 */
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 /* sizeof mcount call */
17
18#ifndef __ASSEMBLY__
19extern void _mcount(void);
20#define mcount _mcount
21
Wu Zhangjin046199c2009-11-20 20:34:36 +080022#define safe_load(load, src, dst, error) \
23do { \
24 asm volatile ( \
25 "1: " load " %[" STR(dst) "], 0(%[" STR(src) "])\n"\
26 " li %[" STR(error) "], 0\n" \
27 "2:\n" \
28 \
29 ".section .fixup, \"ax\"\n" \
30 "3: li %[" STR(error) "], 1\n" \
31 " j 2b\n" \
32 ".previous\n" \
33 \
34 ".section\t__ex_table,\"a\"\n\t" \
35 STR(PTR) "\t1b, 3b\n\t" \
36 ".previous\n" \
37 \
38 : [dst] "=&r" (dst), [error] "=r" (error)\
39 : [src] "r" (src) \
40 : "memory" \
41 ); \
42} while (0)
43
44#define safe_store(store, src, dst, error) \
45do { \
46 asm volatile ( \
47 "1: " store " %[" STR(src) "], 0(%[" STR(dst) "])\n"\
48 " li %[" STR(error) "], 0\n" \
49 "2:\n" \
50 \
51 ".section .fixup, \"ax\"\n" \
52 "3: li %[" STR(error) "], 1\n" \
53 " j 2b\n" \
54 ".previous\n" \
55 \
56 ".section\t__ex_table,\"a\"\n\t"\
57 STR(PTR) "\t1b, 3b\n\t" \
58 ".previous\n" \
59 \
60 : [error] "=r" (error) \
61 : [dst] "r" (dst), [src] "r" (src)\
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
Wu Zhangjin538f1952009-11-20 20:34:32 +080078#ifdef CONFIG_DYNAMIC_FTRACE
79static inline unsigned long ftrace_call_adjust(unsigned long addr)
80{
81 return addr;
82}
83
84struct dyn_arch_ftrace {
85};
Wu Zhangjin046199c2009-11-20 20:34:36 +080086
Wu Zhangjin538f1952009-11-20 20:34:32 +080087#endif /* CONFIG_DYNAMIC_FTRACE */
Wu Zhangjind2bb0762009-11-20 20:34:29 +080088#endif /* __ASSEMBLY__ */
89#endif /* CONFIG_FUNCTION_TRACER */
90#endif /* _ASM_MIPS_FTRACE_H */