From: Sergei Shtylyov <sshtylyov@dev.rtsoft.ru>
To: linux-mips@ftp.linux-mips.org
Subject: LO reg. gets trashed by kgdb in 2.4.x and older kernels
Date: Mon, 05 Jul 2004 19:05:14 +0400 [thread overview]
Message-ID: <40E96E2A.2000403@dev.rtsoft.ru> (raw)
Hi.
I have discovered that the gdb-low.S trashes the LO reg. instead of
restoring it. This was fixed for the 2.6 kernels but, as it seems, was left
unfixed in the earlier ones (run into this on 2.4.18/2.4.20). Here's the patch
against the lastest 2.4.x revision of the file...
Index: linux/arch/mips/kernel/gdb-low.S
===================================================================
RCS file: /home/cvs/linux/arch/mips/kernel/gdb-low.S,v
retrieving revision 1.11.2.3
diff -a -u -r1.11.2.3 gdb-low.S
--- linux/arch/mips/kernel/gdb-low.S 20 Feb 2003 18:19:01 -0000 1.11.2.3
+++ linux/arch/mips/kernel/gdb-low.S 5 Jul 2004 14:48:08 -0000
@@ -283,7 +283,7 @@
lw v0,GDB_FR_HI(sp)
lw v1,GDB_FR_LO(sp)
mthi v0
- mtlo v0
+ mtlo v1
lw ra,GDB_FR_REG31(sp)
lw fp,GDB_FR_REG30(sp)
lw gp,GDB_FR_REG28(sp)
next reply other threads:[~2004-07-05 15:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-05 15:05 Sergei Shtylyov [this message]
2004-07-08 11:43 ` LO reg. gets trashed by kgdb in 2.4.x and older kernels Ralf Baechle
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