[OpenBIOS] [commit] r1025 - trunk/openbios-devel/arch/sparc32
repository service
svn at openbios.org
Sat Feb 12 17:28:06 CET 2011
Author: blueswirl
Date: Sat Feb 12 17:28:06 2011
New Revision: 1025
URL: http://tracker.coreboot.org/trac/openbios/changeset/1025
Log:
sparc32: fix __context corruption in __switch_context_nosave
__switch_context_nosave shall not write to __context, only read it.
Signed-off-by: Artyom Tarasenko <atar4qemu at gmail.com>
Signed-off-by: Blue Swirl <blauwirbel at gmail.com>
Modified:
trunk/openbios-devel/arch/sparc32/switch.S
Modified: trunk/openbios-devel/arch/sparc32/switch.S
==============================================================================
--- trunk/openbios-devel/arch/sparc32/switch.S Tue Feb 8 23:06:59 2011 (r1024)
+++ trunk/openbios-devel/arch/sparc32/switch.S Sat Feb 12 17:28:06 2011 (r1025)
@@ -79,11 +79,15 @@
set (PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2
wr %g2, 0x0, %psr
#endif
-
+ set __context, %g1
+ /* Swap ctx pointer with %fp and jump*/
+ ba __set_context
+ swap [%g1], %fp
__switch_context_nosave:
- set __context, %g1
- /* Swap ctx pointer with %fp */
- swap [%g1], %fp
+ set __context, %g1
+ /* load %fp from ctx pointer */
+ ld [%g1], %fp
+__set_context:
/* Load all registers */
/* offset 0: %g0, no need to load */
ld [%fp + 4], %g1
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