| /* | |
| * arch/arm64/include/asm/ftrace.h | |
| * | |
| * Copyright (C) 2013 Linaro Limited | |
| * Author: AKASHI Takahiro <takahiro.akashi@linaro.org> | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License version 2 as | |
| * published by the Free Software Foundation. | |
| */ | |
| #ifndef __ASM_FTRACE_H | |
| #define __ASM_FTRACE_H | |
| #include <asm/insn.h> | |
| #define MCOUNT_ADDR ((unsigned long)_mcount) | |
| #define MCOUNT_INSN_SIZE AARCH64_INSN_SIZE | |
| #ifndef __ASSEMBLY__ | |
| #include <linux/compat.h> | |
| extern void _mcount(unsigned long); | |
| extern void *return_address(unsigned int); | |
| struct dyn_arch_ftrace { | |
| /* No extra data needed for arm64 */ | |
| }; | |
| extern unsigned long ftrace_graph_call; | |
| extern void return_to_handler(void); | |
| static inline unsigned long ftrace_call_adjust(unsigned long addr) | |
| { | |
| /* | |
| * addr is the address of the mcount call instruction. | |
| * recordmcount does the necessary offset calculation. | |
| */ | |
| return addr; | |
| } | |
| #define ftrace_return_address(n) return_address(n) | |
| /* | |
| * Because AArch32 mode does not share the same syscall table with AArch64, | |
| * tracing compat syscalls may result in reporting bogus syscalls or even | |
| * hang-up, so just do not trace them. | |
| * See kernel/trace/trace_syscalls.c | |
| * | |
| * x86 code says: | |
| * If the user really wants these, then they should use the | |
| * raw syscall tracepoints with filtering. | |
| */ | |
| #define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS | |
| static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) | |
| { | |
| return is_compat_task(); | |
| } | |
| #endif /* ifndef __ASSEMBLY__ */ | |
| #endif /* __ASM_FTRACE_H */ |