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Re: RELASZ is set to 0 on x86_64 when developing EFI applications with gnu-efi

Forgot to cc the list.

2014-06-06 23:08 GMT+08:00 H.J. Lu <>:
> On Fri, Jun 6, 2014 at 12:21 AM, éæ <> wrote:
>> Hi Experts,
>>       I am developing EFI applications using gnu-efi library and I
>> need to use some of the existing code base which groups initialization
>> functions together in a special section.
>>       The gnu-efi library uses the symbol _DYNAMIC to locate the
>> relocation section and does fixups before calling main. Without the
>> special section for init functions, there is only a '.rela' section
>> pointed by _DYMAMIC and everything works fine. But after I modified
>> the default linker script, the produced ELF image contains 2
>> relocation sections:
>> --------------------------------------------------------------------------------------------------------------
>> Relocation section '.rela.dyn' at offset 0x23850 contains 1 entries:
>>   Offset          Info           Type           Sym. Value    Sym. Name + Addend
>> 000000027de0  000000000008 R_X86_64_RELATIVE                    000000000000b7d0
> What change you made causes rela.dyn section?

In one of the source file, I have:

void xxxInit(void)
static void * __func_xxxInit
__attribute__((section(".init."))) =  (void *)xxxInit;

And in linker script I added this:

einit_before_shell = .;

The relocation entry is for the function pointer. If I remove the
"__attribute__((section(...)))" part, then
the problem disappears.


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