RFC: Use .plt section sh_entsize instead of GET_PLT_ENTRY_SIZE

Jan Beulich JBeulich@suse.com
Mon Aug 12 09:26:00 GMT 2013


>>> On 09.08.13 at 19:16, "H.J. Lu" <hjl.tools@gmail.com> wrote:
> We need to increase x86-64 PLT entry size to 32 bytes to
> support Intel MPX.  But elf_x86_64_plt_sym_val uses the
> hardcoded PLT entry size and disassembler can't deal
> with a different PLT entry size.  For x86-64, PLT entry size
> is the same as .plt section sh_entsize.  We can use it instead.
> This assumes .sh_entsize is set correctly.  Both ld and gold
> handle it properly.  Will this change cause any problems?

Wasn't your plan to support a mixture of 16- and 32-byte
entries? In which case considering the entry size to be 16
would remain to be correct?

Jan



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