linux-kernel - [patch part-III V2 07/23] x86/traps: Prepare for using DEFINE

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Message-Id: <20200308231719.131064933@linutronix.de>
Date:   Mon, 09 Mar 2020 00:14:17 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Steven Rostedt <rostedt@...dmis.org>,
        Brian Gerst <brgerst@...il.com>,
        Juergen Gross <jgross@...e.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        Alexandre Chartre <alexandre.chartre@...cle.com>
Subject: [patch part-III V2 07/23] x86/traps: Prepare for using DEFINE_IDTENTRY

From: Thomas Gleixner <tglx@...utronix.de>

Prepare for using IDTENTRY to define the C exception/trap entry points. It
would be possible to glue this into the existing macro maze, but it's
simpler and better to read at the end to just make them distinct. Provide
a trivial inline helper to read the trap address.

The existing macros will be removed once all instances are converted.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@...cle.com>

---
 arch/x86/kernel/traps.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -274,6 +274,11 @@ static void do_error_trap(struct pt_regs
 	}
 }
 
+static inline void __user *error_get_trap_addr(struct pt_regs *regs)
+{
+	return (void __user *)uprobe_get_trap_addr(regs);
+}
+
 #define IP ((void __user *)uprobe_get_trap_addr(regs))
 #define DO_ERROR(trapnr, signr, sicode, addr, str, name)		   \
 dotraplinkage void do_##name(struct pt_regs *regs, long error_code)	   \