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[POWERPC] Fix hang in start_ldr if _end or _edata is unaligned

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Quick fix for lack of memset(__bss_start, 0, _end-__bss_start) in
load_kernel().  If edata is unaligned, the loop will overwrite all
memory because r3 and r4 will never be equal.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Olaf Hering 2006-10-20 15:57:15 +02:00 committed by Paul Mackerras
parent aa7a32cbda
commit fb20f65a01
1 changed files with 3 additions and 3 deletions
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6
arch/ppc/boot/simple/relocate.S
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@ -154,8 +154,8 @@ do_relocate_out:
start_ldr:
/* Clear all of BSS and set up stack for C calls */
lis r3,edata@h
ori r3,r3,edata@l
lis r3,__bss_start@h
ori r3,r3,__bss_start@l
lis r4,end@h
ori r4,r4,end@l
subi r3,r3,4
@ -163,7 +163,7 @@ start_ldr:
li r0,0
50: stwu r0,4(r3)
cmpw cr0,r3,r4
bne 50b
blt 50b
90: mr r9,r1 /* Save old stack pointer (in case it matters) */
lis r1,.stack@h
ori r1,r1,.stack@l