Patchwork [v4,4/7] powerpc/book3e: support kgdb for kernel space

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Submitter Tiejun Chen
Date March 11, 2013, 11:02 a.m.
Message ID <1362999766-20897-5-git-send-email-tiejun.chen@windriver.com>
Download mbox | patch
Permalink /patch/226519/
State Superseded
Delegated to: Benjamin Herrenschmidt
Headers show

Comments

Tiejun Chen - March 11, 2013, 11:02 a.m.
Currently we need to skip this for supporting KGDB.

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
---
 arch/powerpc/kernel/exceptions-64e.S |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Patch

diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 7df9a1f..fd5d61b 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -598,11 +598,13 @@  kernel_dbg_exc:
 	rfdi
 
 	/* Normal debug exception */
+1:	andi.	r14,r11,MSR_PR;		/* check for userspace again */
+#ifndef CONFIG_KGDB
 	/* XXX We only handle coming from userspace for now since we can't
 	 *     quite save properly an interrupted kernel state yet
 	 */
-1:	andi.	r14,r11,MSR_PR;		/* check for userspace again */
 	beq	kernel_dbg_exc;		/* if from kernel mode */
+#endif
 
 	/* Now we mash up things to make it look like we are coming on a
 	 * normal exception