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| author | AKASHI Takahiro <takahiro.akashi@linaro.org> | 2014-04-30 10:54:36 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2014-05-29 09:08:33 +0100 |
| commit | 055b1212d141f1f398fca548f8147787c0b6253f (patch) | |
| tree | a2baa3bd73b450008056bf69edf708e7902736b5 /arch/arm64/include/asm/unistd.h | |
| parent | 3711784ece66d39352a0dbb6da40e097a77da057 (diff) | |
| download | lwn-055b1212d141f1f398fca548f8147787c0b6253f.tar.gz lwn-055b1212d141f1f398fca548f8147787c0b6253f.zip | |
arm64: ftrace: Add system call tracepoint
This patch allows system call entry or exit to be traced as ftrace events,
ie. sys_enter_*/sys_exit_*, if CONFIG_FTRACE_SYSCALLS is enabled.
Those events appear and can be controlled under
${sysfs}/tracing/events/syscalls/
Please note that we can't trace compat system calls here because
AArch32 mode does not share the same syscall table with AArch64.
Just define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS in order to avoid unexpected
results (bogus syscalls reported or even hang-up).
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/unistd.h')
| -rw-r--r-- | arch/arm64/include/asm/unistd.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h index a4654c656a1e..e5f47df00c24 100644 --- a/arch/arm64/include/asm/unistd.h +++ b/arch/arm64/include/asm/unistd.h @@ -29,3 +29,5 @@ #endif #define __ARCH_WANT_SYS_CLONE #include <uapi/asm/unistd.h> + +#define NR_syscalls (__NR_syscalls) |