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microblaze: Disable stack protection from bootloader
author
Michal Simek
<michal.simek@xilinx.com>
Fri, 23 Aug 2013 05:16:50 +0000
(07:16 +0200)
committer
Michal Simek
<michal.simek@xilinx.com>
Mon, 27 Jan 2014 10:26:32 +0000
(11:26 +0100)
Microblaze without MMU can use stack protection in bootloader
and kernel should clear this setting ASAP.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
arch/microblaze/kernel/head.S
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diff --git
a/arch/microblaze/kernel/head.S
b/arch/microblaze/kernel/head.S
index
817b7ee
..
b7fb043
100644
(file)
--- a/
arch/microblaze/kernel/head.S
+++ b/
arch/microblaze/kernel/head.S
@@
-64,6
+64,10
@@
real_start:
#endif
mts rmsr, r0
+/* Disable stack protection from bootloader */
+ mts rslr, r0
+ addi r8, r0, 0xFFFFFFF
+ mts rshr, r8
/*
* According to Xilinx, msrclr instruction behaves like 'mfs rX,rpc'
* if the msrclr instruction is not enabled. We use this to detect