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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>
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Original file line number | Diff line number | Diff line change |
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@@ -29,3 +29,5 @@ | |
#endif | ||
#define __ARCH_WANT_SYS_CLONE | ||
#include <uapi/asm/unistd.h> | ||
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#define NR_syscalls (__NR_syscalls) |
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