linux-kernel - [PATCH 1/2] uprobe: Change uretprobe syscall scope and number

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Message-ID: <20240712135228.1619332-2-jolsa@kernel.org>
Date: Fri, 12 Jul 2024 15:52:27 +0200
From: Jiri Olsa <jolsa@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrii Nakryiko <andrii@...nel.org>,
	Arnd Bergmann <arnd@...db.de>
Cc: linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	linux-api@...r.kernel.org,
	x86@...nel.org,
	bpf@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	"Borislav Petkov (AMD)" <bp@...en8.de>,
	Ingo Molnar <mingo@...hat.com>,
	Andy Lutomirski <luto@...nel.org>,
	Deepak Gupta <debug@...osinc.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: [PATCH 1/2] uprobe: Change uretprobe syscall scope and number

After discussing with Arnd [1] it's preferable to change uretprobe
syscall number to 467 to omit the merge conflict with xattrat syscalls.

Also changing the ABI to 'common' which will ease up the global
scripts/syscall.tbl management. One consequence is we generate uretprobe
syscall numbers for ABIs that do not support uretprobe syscall, but the
syscall still returns -ENOSYS when called in that ABI.

[1] https://lore.kernel.org/lkml/784a34e5-4654-44c9-9c07-f9f4ffd952a0@app.fastmail.com/

Fixes: 190fec72df4a ("uprobe: Wire up uretprobe system call")
Suggested-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 arch/x86/entry/syscalls/syscall_64.tbl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index 6452c2ec469a..dabf1982de6d 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -384,7 +384,7 @@
 460	common	lsm_set_self_attr	sys_lsm_set_self_attr
 461	common	lsm_list_modules	sys_lsm_list_modules
 462 	common  mseal			sys_mseal
-463	64	uretprobe		sys_uretprobe
+467	common	uretprobe		sys_uretprobe
 
 #
 # Due to a historical design error, certain syscalls are numbered differently
-- 
2.45.2