diff options
Diffstat (limited to 'arch/arm/include/asm/ftrace.h')
-rw-r--r-- | arch/arm/include/asm/ftrace.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h new file mode 100644 index 0000000000..5be3ddc96a --- /dev/null +++ b/arch/arm/include/asm/ftrace.h @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_ARM_FTRACE +#define _ASM_ARM_FTRACE + +#define HAVE_FUNCTION_GRAPH_FP_TEST + +#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS +#define ARCH_SUPPORTS_FTRACE_OPS 1 +#endif + +#ifdef CONFIG_FUNCTION_TRACER +#define MCOUNT_ADDR ((unsigned long)(__gnu_mcount_nc)) +#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ + +#ifndef __ASSEMBLY__ +extern void __gnu_mcount_nc(void); + +#ifdef CONFIG_DYNAMIC_FTRACE +struct dyn_arch_ftrace { +#ifdef CONFIG_ARM_MODULE_PLTS + struct module *mod; +#endif +}; + +static inline unsigned long ftrace_call_adjust(unsigned long addr) +{ + /* With Thumb-2, the recorded addresses have the lsb set */ + return addr & ~1; +} +#endif + +#endif + +#endif + +#ifndef __ASSEMBLY__ + +#if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) +/* + * return_address uses walk_stackframe to do it's work. If both + * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind + * information. For this to work in the function tracer many functions would + * have to be marked with __notrace. So for now just depend on + * !CONFIG_ARM_UNWIND. + */ + +void *return_address(unsigned int); + +#else + +static inline void *return_address(unsigned int level) +{ + return NULL; +} + +#endif + +#define ftrace_return_address(n) return_address(n) + +#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME + +static inline bool arch_syscall_match_sym_name(const char *sym, + const char *name) +{ + if (!strcmp(sym, "sys_mmap2")) + sym = "sys_mmap_pgoff"; + else if (!strcmp(sym, "sys_statfs64_wrapper")) + sym = "sys_statfs64"; + else if (!strcmp(sym, "sys_fstatfs64_wrapper")) + sym = "sys_fstatfs64"; + else if (!strcmp(sym, "sys_arm_fadvise64_64")) + sym = "sys_fadvise64_64"; + + /* Ignore case since sym may start with "SyS" instead of "sys" */ + return !strcasecmp(sym, name); +} + +void prepare_ftrace_return(unsigned long *parent, unsigned long self, + unsigned long frame_pointer, + unsigned long stack_pointer); + +#endif /* ifndef __ASSEMBLY__ */ + +#endif /* _ASM_ARM_FTRACE */ |