Hi Jiri,
On 5/29/19 9:15 AM, Jiri Svoboda wrote:
> Hi,
>
> I stumbled upon this strange issue while adding ia64 support to HelenOS
> dynamic linker....
>
> When I build a shared library for ia64 (I can reproduce this with target
> ia64-pc-linux-gnu-gcc), the linker generates relocations against local
> symbols - for static functions that we take pointer to, I assume this is
> because the function descriptors from the Itanium ABI need the absolute
> address of the function. These local symbols are present in the dynamic
> symbol table, but *not present* in the dynamic hash table.
>
> Steps to reproduce:
> gcc-9.1.0 configured with target ia64-pc-linux-gnu-gcc
> binutils-2.32 configured with target ia64-pc-linux-gnu-gcc
>
> test.c:
> void (*fptr)(void);
>
> static void a(void)
> {
> fptr = a;
> }
>
> void b(void)
> {
> fptr = b;
> }
>
>
> /usr/local/x/bin/ia64-pc-linux-gnu-gcc -fPIC -o test.o -c test.c
> /usr/local/x/bin/ia64-pc-linux-gnu-gcc -fPIC -o test.so test.o -nostdlib
> -shared
>
> Can anybody advise on whether this is some kind of expected behavior, or
> should it be considered a bug? This makes it difficult for the dynamic
> linker to resolve the references efficiently. It seems prettty
> surpsising that this would go on unnoticed if it were a bug...
What does Linux do in this case?
Jakub
>
> Thanks,
> Jiri
>
> _______________________________________________
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> [email protected]
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>
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