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[98.150.136.16]) by smtp.gmail.com with ESMTPSA id y6sm33571340pfl.187.2018.11.24.17.54.04 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 24 Nov 2018 17:54:05 -0800 (PST) Date: Sat, 24 Nov 2018 15:54:02 -1000 From: Joey Pabalinas To: Elvira Khabirova Cc: oleg@redhat.com, rostedt@goodmis.org, mingo@redhat.com, linux-api@vger.kernel.org, esyr@redhat.com, linux-kernel@vger.kernel.org, luto@kernel.org, ldv@altlinux.org, strace-devel@lists.strace.io, Joey Pabalinas Subject: Re: [PATCH RESEND v3 1/3] ptrace: pass type of a syscall-stop in ptrace_message Message-ID: <20181125015402.glcaw3kghcu4pr22@gmail.com> Mail-Followup-To: Joey Pabalinas , Elvira Khabirova , oleg@redhat.com, rostedt@goodmis.org, mingo@redhat.com, linux-api@vger.kernel.org, esyr@redhat.com, linux-kernel@vger.kernel.org, luto@kernel.org, ldv@altlinux.org, strace-devel@lists.strace.io References: <20181125022150.46258a20@akathisia> <20181125022227.55e8caf7@akathisia> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="vdbkloxosvqpo44e" Content-Disposition: inline In-Reply-To: <20181125022227.55e8caf7@akathisia> User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --vdbkloxosvqpo44e Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Nov 25, 2018 at 02:22:27AM +0100, Elvira Khabirova wrote: > Define two constants, PTRACE_EVENTMSG_SYSCALL_ENTRY and > PTRACE_EVENTMSG_SYSCALL_EXIT, and place them in ptrace_message > for the duration of syscall-stops. > This way ptracers can distinguish syscall-enter-stops > from syscall-exit-stops using PTRACE_GETEVENTMSG request. Is there an advantage to using two constants instead of a single sys_exit bit (set/unset for syscall-exit-stop/syscall-enter-stop)? --=20 Cheers, Joey Pabalinas --vdbkloxosvqpo44e Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEENpTlWU2hUK/KMvHp2rGdfm9DtVIFAlv6ALkACgkQ2rGdfm9D tVLi0Q//UPIcLhCeeQC2SfdW8U7Ul0C9+7Ox/YhYslXMK95uwdUZAjdfomhPHKr2 Q6mraLrDgIaHygDKqX3FWkuFlOPWw+LHIV6xnpPotbQAT16JHWXnu/EqcRF5GQ43 Hz/0GUcgBAGiPeiINvgl56E74hUyikVKPf3ppKV5PhQvoD0lDR0Ko2HYepJaG4KH aglOle74Cf0hBy9zHGRFs36fWrFSepaBGYIlYAm598IsaUEqA/yFbZQiSgGfVjr/ XhZpj1G22Vk8xXjPHWFWk7wCblGoIleRXVT0EShu2ZUt79BUT0xUxrYyqpmT5SVZ PiCgiYKmeEmpS18AVDVCbQXzYkJ3lqzbrSqaCcY0h0OrVZ8YShXBO7L2lrlLQAkk 0P3o08duYbRfdTJzmcLA7gpJpI8yFuQKb55sgBLZT1OBisWkDoQSqtpzzoKlPw7f mD0WyexCFkrUxAEk2W7ZZ6FzrNKth7VHWDy/X3hQs56bTNCOEJITFY01GMODfI4E V6jDwElAauUUNMeuYIG4LKmbD9LMBEEutxnQ2BhzYXPGI6q/LIA3KKuI5/Ktqg0A DiEVTYMdsHFpjmZNXRGlP5lPjN4zxUo5F+MoiOefpUT4oPxOcMEbWiMzeChjK9xT iD8fU8oxLYS9wiaBvUM0Bx0Ia5d0K8f++zHpuhLdF6WIiS6A4Dk= =KbCj -----END PGP SIGNATURE----- --vdbkloxosvqpo44e--