Re: question about "Failed to execute /init"

[Sandeep K Sinha <sandeepksinha at gmail dot com>]

You should have asked this at the bunutils list.

cc'inf binutils.

On Sun, Jan 25, 2009 at 10:02 PM, loody <miloody@gmail.com> wrote:
>> my init is a very simple program like below
>>
>> #include <stdio.h>
>> int main()
>> {
>>        printf("hello world\n");
>>        sleep(999999);
>>        return 0;
>> }
>> And my init is static build with "-static" option  and I use
>> cross-objdump to read it and it doesn't tell me there are any library
>> it depends on.
> Dear all:
> I find there is some problem about kernel setting to support loading
> static/dynamic elf format.
> I study the kernel source and find my error comes from
> search_binary_handler and it return -8, -ENOEXEC, while executing,
> fmt->load_binary.
>
> In kernel source, the core_initcall will register different
> init_elf_xxxfmt, and it seems this option will determine whether
> kernel support dynamic or static elf execute files.
> And kernel seems support these binfmts:
> binfmt_aout.c:static struct linux_binfmt aout_format = {
> binfmt_elf.c:static struct linux_binfmt elf_format = {
> binfmt_elf_fdpic.c:static struct linux_binfmt elf_fdpic_format = {
> binfmt_em86.c:static struct linux_binfmt em86_format = {
> binfmt_flat.c:static struct linux_binfmt flat_format = {
> binfmt_misc.c:static struct linux_binfmt misc_format = {
> binfmt_script.c:static struct linux_binfmt script_format = {
> binfmt_som.c:static struct linux_binfmt som_format = {
>
> And I check my fs folder and I only see this *.o files:
> -rw-r--r-- 1 root root 2748 2009-01-23 11:42 binfmt_script.o
> which is the default binfmt that will support.
>
> My questions are:
> 1. are my assumptions above correct? take my static build init for
> example, should I check whether static binary elf support code has
> build in my kernel?
> 2. if my assumption correct, which one in the list is my choice and
> what config I should add in my uclinxu kernel config?
> 3. if my assumption above is wrong and kernel will default support
> static elf file, why I get -8, -ENOEXEC, while calling
> fmt->load_binary.
> 4. There is only binfmt_script.o build in my kernel, but why in try=2
> loop in search_binary_handler, I still get 2 fmt->load_binarys. There
> should only be 1 fmt->load_binary, load_script in Binfmt_script.c.
>
> appreciate your help,
> miloody
>
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>



-- 
Regards,
Sandeep.





 	
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