From: Olaf Hering Date: Fri, 20 Oct 2006 13:57:15 +0000 (+0200) Subject: [POWERPC] Fix hang in start_ldr if _end or _edata is unaligned X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=fb20f65a01a97bdf4bb746eecfc24a08561e2648;p=linux-beck.git [POWERPC] Fix hang in start_ldr if _end or _edata is unaligned 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 Signed-off-by: Paul Mackerras --- diff --git a/arch/ppc/boot/simple/relocate.S b/arch/ppc/boot/simple/relocate.S index 0c021556d78e..1bbbcd2f2bcb 100644 --- a/arch/ppc/boot/simple/relocate.S +++ b/arch/ppc/boot/simple/relocate.S @@ -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