diff options
| -rw-r--r-- | arch/arm/include/asm/ftrace.h | 18 | ||||
| -rw-r--r-- | arch/arm/kernel/Makefile | 5 |
2 files changed, 22 insertions, 1 deletions
diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h index 5358aad67831..7e9251ca29fe 100644 --- a/arch/arm/include/asm/ftrace.h +++ b/arch/arm/include/asm/ftrace.h @@ -35,8 +35,26 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr) #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 diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index 5cebb8d5a1d6..56511856ff9d 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -25,7 +25,10 @@ obj-y := elf.o entry-common.o irq.o opcodes.o \ KASAN_SANITIZE_stacktrace.o := n KASAN_SANITIZE_traps.o := n -obj-y += return_address.o +ifneq ($(CONFIG_ARM_UNWIND),y) +obj-$(CONFIG_FRAME_POINTER) += return_address.o +endif + obj-$(CONFIG_ATAGS) += atags_parse.o obj-$(CONFIG_ATAGS_PROC) += atags_proc.o obj-$(CONFIG_DEPRECATED_PARAM_STRUCT) += atags_compat.o |