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| author | Norbert van Bolhuis <nvbolhuis@aimvalley.nl> | 2010-03-19 15:34:25 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-05-05 23:55:02 +0200 |
| commit | 3882d7a5a57eb8d1f41570522445bab61c628e6f (patch) | |
| tree | 6b75e053e162e4728c3395158014342c80f72e35 /arch/powerpc/lib | |
| parent | 4b42c9059e165500353174601a8e97b2cf81d3f4 (diff) | |
| download | talos-obmc-uboot-3882d7a5a57eb8d1f41570522445bab61c628e6f.tar.gz talos-obmc-uboot-3882d7a5a57eb8d1f41570522445bab61c628e6f.zip | |
ppc: unused memory region too close to current stack pointer
This avoids a possible overwrite of the (end of) ramdisk by u-boot.
The unused memory region for ppc boot currently starts 1k below the
do_bootm->bootm_start->arch_lmb_reserve stack ptr. This isn't enough since
do_bootm->do_bootm_linux->boot_relocate_fdt calls printf which may
very well use more than 1k stack space.
Signed-off-by: Norbert van Bolhuis <nvbolhuis@aimvalley.nl>
Diffstat (limited to 'arch/powerpc/lib')
| -rw-r--r-- | arch/powerpc/lib/bootm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/lib/bootm.c b/arch/powerpc/lib/bootm.c index 0685a9331c..6702df51a5 100644 --- a/arch/powerpc/lib/bootm.c +++ b/arch/powerpc/lib/bootm.c @@ -163,8 +163,8 @@ void arch_lmb_reserve(struct lmb *lmb) sp = get_sp(); debug ("## Current stack ends at 0x%08lx\n", sp); - /* adjust sp by 1K to be safe */ - sp -= 1024; + /* adjust sp by 4K to be safe */ + sp -= 4096; lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp)); return ; |
