projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 395a59d0 AS |
2 | #ifndef _ASM_ARM_FTRACE |
| 3 | #define _ASM_ARM_FTRACE | |
| 4 | ||
| 620176f3 AV |
5 | #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS |
| 6 | #define ARCH_SUPPORTS_FTRACE_OPS 1 | |
| 7 | #endif | |
| 8 | ||
| 606576ce | 9 | #ifdef CONFIG_FUNCTION_TRACER |
| 3b6c223b | 10 | #define MCOUNT_ADDR ((unsigned long)(__gnu_mcount_nc)) |
| 395a59d0 AS |
11 | #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ |
| 12 | ||
| 13 | #ifndef __ASSEMBLY__ | |
| 14 | extern void mcount(void); | |
| 181f817e | 15 | extern void __gnu_mcount_nc(void); |
| 3b6c223b RV |
16 | |
| 17 | #ifdef CONFIG_DYNAMIC_FTRACE | |
| 18 | struct dyn_arch_ftrace { | |
| 19 | #ifdef CONFIG_OLD_MCOUNT | |
| 20 | bool old_mcount; | |
| 21 | #endif | |
| 22 | }; | |
| 23 | ||
| 24 | static inline unsigned long ftrace_call_adjust(unsigned long addr) | |
| 25 | { | |
| 72dc43a9 RV |
26 | /* With Thumb-2, the recorded addresses have the lsb set */ |
| 27 | return addr & ~1; | |
| 3b6c223b RV |
28 | } |
| 29 | ||
| 30 | extern void ftrace_caller_old(void); | |
| 31 | extern void ftrace_call_old(void); | |
| 32 | #endif | |
| 33 | ||
| 395a59d0 AS |
34 | #endif |
| 35 | ||
| 36 | #endif | |
| 37 | ||
| 4bf1fa5a UKK |
38 | #ifndef __ASSEMBLY__ |
| 39 | ||
| 40 | #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) | |
| 41 | /* | |
| 42 | * return_address uses walk_stackframe to do it's work. If both | |
| 43 | * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind | |
| 44 | * information. For this to work in the function tracer many functions would | |
| 45 | * have to be marked with __notrace. So for now just depend on | |
| 46 | * !CONFIG_ARM_UNWIND. | |
| 47 | */ | |
| 48 | ||
| 49 | void *return_address(unsigned int); | |
| 50 | ||
| 51 | #else | |
| 52 | ||
| aeea3592 | 53 | static inline void *return_address(unsigned int level) |
| 4bf1fa5a UKK |
54 | { |
| 55 | return NULL; | |
| 56 | } | |
| 57 | ||
| 58 | #endif | |
| 59 | ||
| 1712ef43 | 60 | #define ftrace_return_address(n) return_address(n) |
| 4bf1fa5a | 61 | |
| 270c8cf1 RV |
62 | #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME |
| 63 | ||
| 64 | static inline bool arch_syscall_match_sym_name(const char *sym, | |
| 65 | const char *name) | |
| 66 | { | |
| 67 | if (!strcmp(sym, "sys_mmap2")) | |
| 68 | sym = "sys_mmap_pgoff"; | |
| 69 | else if (!strcmp(sym, "sys_statfs64_wrapper")) | |
| 70 | sym = "sys_statfs64"; | |
| 71 | else if (!strcmp(sym, "sys_fstatfs64_wrapper")) | |
| 72 | sym = "sys_fstatfs64"; | |
| 73 | else if (!strcmp(sym, "sys_arm_fadvise64_64")) | |
| 74 | sym = "sys_fadvise64_64"; | |
| 75 | ||
| 76 | /* Ignore case since sym may start with "SyS" instead of "sys" */ | |
| 77 | return !strcasecmp(sym, name); | |
| 78 | } | |
| 79 | ||
| 4bf1fa5a UKK |
80 | #endif /* ifndef __ASSEMBLY__ */ |
| 81 | ||
| 395a59d0 | 82 | #endif /* _ASM_ARM_FTRACE */ |