Author: andreast
Date: Wed Nov 17 19:28:48 2010
New Revision: 215436
URL: http://svn.freebsd.org/changeset/base/215436
Log:
Make sure the .bss is cleared at the beginning. The pSeries OF ELF loader does
not clear .bss automatically.
Approved by: nwhitehorn (mentor)
Modified:
head/sys/boot/powerpc/ofw/start.c
Modified: head/sys/boot/powerpc/ofw/start.c
==============================================================================
--- head/sys/boot/powerpc/ofw/start.c Wed Nov 17 19:25:37 2010
(r215435)
+++ head/sys/boot/powerpc/ofw/start.c Wed Nov 17 19:28:48 2010
(r215436)
@@ -50,7 +50,20 @@ _start: \n\
addi %r1,%r1,st...@l \n\
addi %r1,%r1,16384 \n\
\n\
- b startup \n\
+ /* Clear the .bss!!! */ \n\
+ li %r0,0 \n\
+ lis %r8,_ed...@ha \n\
+ addi %r8,%r8,_ed...@l\n\
+ lis %r9,_...@ha \n\
+ addi %r9,%r9,_...@l \n\
+ \n\
+1: cmpw 0,%r8,%r9 \n\
+ bge 2f \n\
+ stw %r0,0(%r8) \n\
+ addi %r8,%r8,4 \n\
+ b 1b \n\
+ \n\
+2: b startup \n\
");
void
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