[U-Boot] [PATCH] malloc: Use malloc simple before malloc is fully initialized in memalign()

[Ley Foon Tan]

On Fri, May 25, 2018 at 11:33 AM, Simon Glass <sjg at chromium.org> wrote:
> Hi,
>
> On 24 May 2018 at 21:24, Ley Foon Tan <lftan.linux at gmail.com> wrote:
>>
>> On Thu, May 24, 2018 at 12:33 AM, Simon Glass <sjg at chromium.org> wrote:
>> > Hi,
>> >
>> > On 23 May 2018 at 00:32, Ley Foon Tan <lftan.linux at gmail.com> wrote:
>> >> On Sat, May 19, 2018 at 10:37 PM, Simon Glass <sjg at chromium.org> wrote:
>> >>> Hi Ley,
>> >>>
>> >>> On 18 May 2018 at 04:03, Ley Foon Tan <ley.foon.tan at intel.com> wrote:
>> >>>> Follow implementation in mALLOc(). Check GD_FLG_FULL_MALLOC_INIT flag and use
>> >>>> malloc_simple if GD_FLG_FULL_MALLOC_INIT is unset. Adjust the malloc bytes
>> >>>> to align with the requested alignment.
>> >>>>
>> >>>> The original memalign() function will access mchunkptr struct to adjust the
>> >>>> alignment if there is misalignment happen, but mchunkptr struct is not being
>> >>>> initialized before full malloc is initialized. This cause the system crash.
>> >>>>
>> >>>> Signed-off-by: Ley Foon Tan <ley.foon.tan at intel.com>
>> >>>> ---
>> >>>>  common/dlmalloc.c |    7 +++++++
>> >>>>  1 files changed, 7 insertions(+), 0 deletions(-)
>> >>>>
>> >>>> diff --git a/common/dlmalloc.c b/common/dlmalloc.c
>> >>>> index b395eef..edaad29 100644
>> >>>> --- a/common/dlmalloc.c
>> >>>> +++ b/common/dlmalloc.c
>> >>>> @@ -1891,6 +1891,13 @@ Void_t* mEMALIGn(alignment, bytes) size_t alignment; size_t bytes;
>> >>>>
>> >>>>    if ((long)bytes < 0) return NULL;
>> >>>>
>> >>>> +#if CONFIG_VAL(SYS_MALLOC_F_LEN)
>> >>>
>> >>> How about:
>> >>>
>> >>> if (IS_ENABLED(CONFIG_SYS_MALLOC_F))
>> >>
>> >> I think this is the reason it uses #if CONFIG_VAL(SYS_MALLOC_F_LEN),
>> >> same for malloc().
>> >>
>> >> "spl: make SPL and normal u-boot stage use independent SYS_MALLOC_F_LEN"
>> >>
>> >> http://git.denx.de/?p=u-boot.git;a=commit;h=f1896c45cb2f7d8dbed27e784a6459a129fc0762
>> >
>> > So how about
>> >
>> > if (CONFIG_IS_ENABLED(SYS_MALLOC_F_LEN)
>> >
>> > Or you could use #if if you need to
>>
>> Tested both #if (CONFIG_IS_ENABLED(SYS_MALLOC_F_LEN)) and if
>> (CONFIG_IS_ENABLED(SYS_MALLOC_F_LEN)), both are not working.
>
> Sorry I mean
>
> CONFIG_IS_ENABLED(SYS_MALLOC_F)
>
> That tells you whether the feature is enabled in U-Boot or SPL.

#if CONFIG_IS_ENABLED(SYS_MALLOC_F) if not working in SPL build.
CONFIG_IS_ENABLED() expects config with "y" or "m", but SPL config is
with "1".
 Need to use #ifdef CONFIG_SYS_MALLOC_F. Do you want to change to this?

Regards
Ley Foon