projects / linux-2.6-block.git / blame
| 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 */ |