Re: [PATCH] ptrace.2: Add details about usage of PTRACE_GET_SYSCALL_INFO

Alex Colomar <alx.manpages@xxxxxxxxx> · Sat, 25 Feb 2023 02:21:51 +0100

Hi Dmitry!

On 2/25/23 01:08, Dmitry V. Levin wrote:
On Sat, Feb 25, 2023 at 01:43:18AM +0200, Φώτης Βαλασιάδης wrote:
Better?

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

LGTM, thanks.

Ahh, I see you already CCd Nate.  Thanks!

Thanks for the review!  I should take that as an Acked-by?

Cheers,

Alex




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