projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 819e50e2 AT |
1 | /* |
| 2 | * arch/arm64/include/asm/ftrace.h | |
| 3 | * | |
| 4 | * Copyright (C) 2013 Linaro Limited | |
| 5 | * Author: AKASHI Takahiro <takahiro.akashi@linaro.org> | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License version 2 as | |
| 9 | * published by the Free Software Foundation. | |
| 10 | */ | |
| 11 | #ifndef __ASM_FTRACE_H | |
| 12 | #define __ASM_FTRACE_H | |
| 13 | ||
| 14 | #include <asm/insn.h> | |
| 15 | ||
| 16 | #define MCOUNT_ADDR ((unsigned long)_mcount) | |
| 17 | #define MCOUNT_INSN_SIZE AARCH64_INSN_SIZE | |
| 18 | ||
| 19 | #ifndef __ASSEMBLY__ | |
| 055b1212 AT |
20 | #include <linux/compat.h> |
| 21 | ||
| 819e50e2 | 22 | extern void _mcount(unsigned long); |
| 3711784e | 23 | extern void *return_address(unsigned int); |
| bd7d38db AT |
24 | |
| 25 | struct dyn_arch_ftrace { | |
| 26 | /* No extra data needed for arm64 */ | |
| 27 | }; | |
| 28 | ||
| 29 | extern unsigned long ftrace_graph_call; | |
| 30 | ||
| 31 | static inline unsigned long ftrace_call_adjust(unsigned long addr) | |
| 32 | { | |
| 33 | /* | |
| 34 | * addr is the address of the mcount call instruction. | |
| 35 | * recordmcount does the necessary offset calculation. | |
| 36 | */ | |
| 37 | return addr; | |
| 38 | } | |
| 3711784e AT |
39 | |
| 40 | #define ftrace_return_address(n) return_address(n) | |
| 055b1212 AT |
41 | |
| 42 | /* | |
| 43 | * Because AArch32 mode does not share the same syscall table with AArch64, | |
| 44 | * tracing compat syscalls may result in reporting bogus syscalls or even | |
| 45 | * hang-up, so just do not trace them. | |
| 46 | * See kernel/trace/trace_syscalls.c | |
| 47 | * | |
| 48 | * x86 code says: | |
| 49 | * If the user realy wants these, then they should use the | |
| 50 | * raw syscall tracepoints with filtering. | |
| 51 | */ | |
| 52 | #define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS | |
| 53 | static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) | |
| 54 | { | |
| 55 | return is_compat_task(); | |
| 56 | } | |
| 3711784e | 57 | #endif /* ifndef __ASSEMBLY__ */ |
| 819e50e2 AT |
58 | |
| 59 | #endif /* __ASM_FTRACE_H */ |