Commit | Line | Data |
---|---|---|
d2bb0762 WZ |
1 | /* |
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 | |
f7a904df | 7 | * Author: Wu Zhangjin <wuzhangjin@gmail.com> |
d2bb0762 WZ |
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 /* sizeof mcount call */ | |
17 | ||
18 | #ifndef __ASSEMBLY__ | |
19 | extern void _mcount(void); | |
20 | #define mcount _mcount | |
21 | ||
046199ca WZ |
22 | #define safe_load(load, src, dst, error) \ |
23 | do { \ | |
24 | asm volatile ( \ | |
b08ac66b VH |
25 | "1: " load " %[tmp_dst], 0(%[tmp_src])\n" \ |
26 | " li %[tmp_err], 0\n" \ | |
aedd153f | 27 | "2: .insn\n" \ |
046199ca WZ |
28 | \ |
29 | ".section .fixup, \"ax\"\n" \ | |
b08ac66b | 30 | "3: li %[tmp_err], 1\n" \ |
046199ca WZ |
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 | \ | |
b08ac66b VH |
38 | : [tmp_dst] "=&r" (dst), [tmp_err] "=r" (error)\ |
39 | : [tmp_src] "r" (src) \ | |
046199ca WZ |
40 | : "memory" \ |
41 | ); \ | |
42 | } while (0) | |
43 | ||
44 | #define safe_store(store, src, dst, error) \ | |
45 | do { \ | |
46 | asm volatile ( \ | |
b08ac66b VH |
47 | "1: " store " %[tmp_src], 0(%[tmp_dst])\n"\ |
48 | " li %[tmp_err], 0\n" \ | |
aedd153f | 49 | "2: .insn\n" \ |
046199ca WZ |
50 | \ |
51 | ".section .fixup, \"ax\"\n" \ | |
b08ac66b | 52 | "3: li %[tmp_err], 1\n" \ |
046199ca WZ |
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 | \ | |
b08ac66b VH |
60 | : [tmp_err] "=r" (error) \ |
61 | : [tmp_dst] "r" (dst), [tmp_src] "r" (src)\ | |
046199ca WZ |
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 | ||
538f1952 WZ |
78 | #ifdef CONFIG_DYNAMIC_FTRACE |
79 | static inline unsigned long ftrace_call_adjust(unsigned long addr) | |
80 | { | |
81 | return addr; | |
82 | } | |
83 | ||
84 | struct dyn_arch_ftrace { | |
85 | }; | |
046199ca | 86 | |
538f1952 | 87 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
d2bb0762 WZ |
88 | #endif /* __ASSEMBLY__ */ |
89 | #endif /* CONFIG_FUNCTION_TRACER */ | |
90 | #endif /* _ASM_MIPS_FTRACE_H */ |