Fixed incomplete doc. PTRACE_GET_SYSCALL_INFO wouldn't inform the user that they need to enable PTRACE_O_TRACESYSGOOD to get detailed information from said operation. Signed-off-by: Fotios Valasiadis <fvalasiad@xxxxxxxxx> Cowritten-by: Dmitry V. Levin <ldv@xxxxxxxxx> --- man2/ptrace.2 | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/man2/ptrace.2 b/man2/ptrace.2 index 55d9fd36d..ad0543b0b 100644 --- a/man2/ptrace.2 +++ b/man2/ptrace.2 @@ -1111,6 +1111,15 @@ stop. .B PTRACE_SYSCALL_INFO_NONE No component of the union contains relevant information. .RE +.IP +Note that in case of +syscall entry or exit stops, the data returned by +.B PTRACE_GET_SYSCALL_INFO +is limited to type +.B PTRACE_SYSCALL_INFO_NONE +unless +.B PTRACE_O_TRACESYSGOOD +option is set before the corresponding ptrace stop has occurred. .\" .SS Death under ptrace When a (possibly multithreaded) process receives a killing signal -- 2.39.2
