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| author | Nathan Whitehorn <nwhitehorn@FreeBSD.org> | 2011-12-16 23:40:56 +0000 |
|---|---|---|
| committer | Nathan Whitehorn <nwhitehorn@FreeBSD.org> | 2011-12-16 23:40:56 +0000 |
| commit | b059c637fb858da2bdac3774af4d90d66b2c753b (patch) | |
| tree | 5f9c5feb3d8a959cf6c5a26d29cafd676207fd1e /sys/powerpc/aim/locore32.S | |
| parent | cf87966cfdcb678122b5e2b6b6448010e7cd6931 (diff) | |
| download | src-b059c637fb858da2bdac3774af4d90d66b2c753b.tar.gz src-b059c637fb858da2bdac3774af4d90d66b2c753b.zip | |
Zero BSS on start, in case the ELF loader that started the kernel did not
do this for us. This can happen on some embedded systems.
Submitted by: rpaulo
Notes
Notes:
svn path=/head/; revision=228605
Diffstat (limited to 'sys/powerpc/aim/locore32.S')
| -rw-r--r-- | sys/powerpc/aim/locore32.S | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sys/powerpc/aim/locore32.S b/sys/powerpc/aim/locore32.S index 020d22d4913d..9ad74fa49f5b 100644 --- a/sys/powerpc/aim/locore32.S +++ b/sys/powerpc/aim/locore32.S @@ -128,6 +128,17 @@ __start: sync isync + /* Zero bss, in case we were started by something unhelpful */ + li 0,0 + lis 8,_edata@ha + addi 8,8,_edata@l + lis 9,_end@ha + addi 9,9,_end@l +2: stw 0,0(8) + addi 8,8,4 + cmplw 8,9 + blt 2b + /* Save the argument pointer and length */ mr 20,6 mr 21,7 |