/* Machine-dependent ELF dynamic relocation inline functions.  Stub version.

   Copyright (C) 1995-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#define ELF_MACHINE_NAME "stub"

#include <string.h>

#include <link.h>

/* Return nonzero iff ELF header is compatible with the running host.  */

static inline int

elf_machine_matches_host (const Elf32_Ehdr *ehdr)

{

  switch (ehdr->e_machine)

    {

    default:

      return 0;

    }

}

/* Return the link-time address of _DYNAMIC.  */

static inline Elf32_Addr

elf_machine_dynamic (void)

{

#error "Damn, no _DYNAMIC"

}

/* Return the run-time load address of the shared object.  */

static inline Elf32_Addr

elf_machine_load_address (void)

{

#error "Where am I?"

}

/* Fixup a PLT entry to bounce directly to the function at VALUE.  */

static inline ElfW(Addr)

elf_machine_fixup_plt (struct link_map *map, lookup_t t,

		       const ElfW(Sym) *refsym, const ElfW(Sym) *sym,

		       const ElfW(Rel) *reloc,

		       ElfW(Addr) *reloc_addr, ElfW(Addr) value)

{

  return *reloc_addr = value;

}

/* Perform the relocation specified by RELOC and SYM (which is fully resolved).

   LOADADDR is the load address of the object; INFO is an array indexed

   by DT_* of the .dynamic section info.  */

auto inline void

__attribute__ ((always_inline))

elf_machine_rel (Elf32_Addr loadaddr, Elf32_Dyn *info[DT_NUM],

		 const Elf32_Rel *reloc, const Elf32_Sym *sym,

		 Elf32_Addr (*resolve) (const Elf32_Sym **ref,

					Elf32_Addr reloc_addr,

					int noplt))

{

  Elf32_Addr *const reloc_addr = (Elf32_Addr *) reloc->r_offset;

  Elf32_Addr loadbase;

  switch (ELF32_R_TYPE (reloc->r_info))

    {

    case R_MACHINE_COPY:

      loadbase = (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0);

      memcpy (reloc_addr, (void *) (loadbase + sym->st_value), sym->st_size);

      break;

    default:

      _dl_reloc_bad_type (map, ELF32_R_TYPE (reloc->r_info), 0);

      break;

    }

}

auto inline Elf32_Addr

__attribute__ ((always_inline))

elf_machine_rela (Elf32_Addr loadaddr, Elf32_Dyn *info[DT_NUM],

		  const Elf32_Rel *reloc, const Elf32_Sym *sym,

		  Elf32_Addr (*resolve) (const Elf32_Sym **ref,

					 Elf32_Addr reloc_addr,

					 int noplt))

{

  _dl_signal_error (0, "Elf32_Rela relocation requested -- unused on "

		    NULL, ELF_MACHINE_NAME);

}

/* Set up the loaded object described by L so its unrelocated PLT

   entries will jump to the on-demand fixup code in dl-runtime.c.  */

static inline int

elf_machine_runtime_setup (struct link_map *l, int lazy)

{

  extern void _dl_runtime_resolve (Elf32_Word);

  if (lazy)

    {

      /* The GOT entries for functions in the PLT have not yet been filled

         in.  Their initial contents will arrange when called to push an

         offset into the .rel.plt section, push _GLOBAL_OFFSET_TABLE_[1],

         and then jump to _GLOBAL_OFFSET_TABLE[2].  */

      Elf32_Addr *got = (Elf32_Addr *) D_PTR (l, l_info[DT_PLTGOT]);

      got[1] = (Elf32_Addr) l;	/* Identify this shared object.  */

      /* This function will get called to fix up the GOT entry indicated by

         the offset on the stack, and then jump to the resolved address.  */

      got[2] = (Elf32_Addr) &_dl_runtime_resolve;

    }

  return lazy;

}

/* Initial entry point code for the dynamic linker.

   The C function `_dl_start' is the real entry point;

   its return value is the user program's entry point.  */

#define RTLD_START #error need some startup code