gnu-efi/gnuefi/elf_ia64_efi.lds
Sergei Trofimovich 2cc0b085fb gnuefi: preserve .gnu.hash sections (unbreaks elilo on IA-64)
Gentoo has slightly modified linker defaults: --hash-style=gnu
This means all ELF files in system have '.gnu.hash' section
but no '.hash' section.

gnuefi's ldscript did not account for it and as a result
one symbol 'ImageBase' did not resolve locally for elilo.so
and caused 'elilo' to fail to load by ia64 EFI:
  Loading.: Gentoo (try new elilo)
  ImageAddress: pointer is outside of image
  ImageAddress: pointer is outside of image

Those two relocations come from crt0-efi-ia64.S PE32 entry point
fdescr:

```
    #define IMAGE_REL_BASED_DIR64<->10
    .section .reloc, "a"
    data4   _start_plabel // Page RVA
    data4   12            // Block Size (2*4+2*2)
    data2   (IMAGE_REL_BASED_DIR64<<12) +  0 // reloc for plabel's entry point
    data2   (IMAGE_REL_BASED_DIR64<<12) +  8 // reloc for plabel's global pointer
```

These refer ImageBase.

The change adds '.gnu.hash' collection (follows existing '.hash'
collection).

Tested on IA-64 by successfully booting elilo-3.16.

Bug: https://bugs.gentoo.org/575300
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
2018-01-27 20:29:05 +00:00

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OUTPUT_FORMAT("elf64-ia64-little")
OUTPUT_ARCH(ia64)
ENTRY(_start_plabel)
SECTIONS
{
. = 0;
ImageBase = .;
/* .hash and/or .gnu.hash MUST come first! */
.hash : { *(.hash) }
.gnu.hash : { *(.gnu.hash) }
. = ALIGN(4096);
.text :
{
_text = .;
*(.text)
*(.text.*)
*(.gnu.linkonce.t.*)
. = ALIGN(16);
}
_etext = .;
_text_size = . - _text;
. = ALIGN(4096);
__gp = ALIGN (8) + 0x200000;
.sdata :
{
_data = .;
*(.got.plt)
*(.got)
*(.srodata)
*(.sdata)
*(.sbss)
*(.scommon)
}
. = ALIGN(4096);
.data :
{
*(.rodata*)
*(.ctors)
*(.data*)
*(.gnu.linkonce.d*)
*(.plabel) /* data whose relocs we want to ignore */
/* the EFI loader doesn't seem to like a .bss section, so we stick
it all into .data: */
*(.dynbss)
*(.bss)
*(COMMON)
}
.note.gnu.build-id : { *(.note.gnu.build-id) }
. = ALIGN(4096);
.dynamic : { *(.dynamic) }
. = ALIGN(4096);
.rela :
{
*(.rela.text)
*(.rela.data*)
*(.rela.sdata)
*(.rela.got)
*(.rela.gnu.linkonce.d*)
*(.rela.stab)
*(.rela.ctors)
}
_edata = .;
_data_size = . - _etext;
. = ALIGN(4096);
.reloc : /* This is the PECOFF .reloc section! */
{
*(.reloc)
}
. = ALIGN(4096);
.dynsym : { *(.dynsym) }
. = ALIGN(4096);
.dynstr : { *(.dynstr) }
/DISCARD/ :
{
*(.rela.plabel)
*(.rela.reloc)
*(.IA_64.unwind*)
*(.IA64.unwind*)
}
}