1 /* Machine-dependent ELF dynamic relocation inline functions. Stub version.
2 Copyright (C) 1995, 1996 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, write to the Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 #define ELF_MACHINE_NAME "stub"
27 /* Return nonzero iff E_MACHINE is compatible with the running host. */
29 elf_machine_matches_host (Elf32_Half e_machine)
39 /* Return the link-time address of _DYNAMIC. */
40 static inline Elf32_Addr
41 elf_machine_dynamic (void)
43 #error "Damn, no _DYNAMIC"
47 /* Return the run-time load address of the shared object. */
48 static inline Elf32_Addr
49 elf_machine_load_address (void)
54 /* This can modify DYNAMIC_INFO to avoid relocating code in
55 the functions above if they are doing bizarre magic. */
56 #define ELF_MACHINE_BEFORE_RTLD_RELOC(dynamic_info) /* nothing */
58 /* Perform the relocation specified by RELOC and SYM (which is fully resolved).
59 LOADADDR is the load address of the object; INFO is an array indexed
60 by DT_* of the .dynamic section info. */
63 elf_machine_rel (Elf32_Addr loadaddr, Elf32_Dyn *info[DT_NUM],
64 const Elf32_Rel *reloc, const Elf32_Sym *sym,
65 Elf32_Addr (*resolve) (const Elf32_Sym **ref,
66 Elf32_Addr reloc_addr,
69 Elf32_Addr *const reloc_addr = (Elf32_Addr *) reloc->r_offset;
72 switch (ELF32_R_TYPE (reloc->r_info))
75 loadbase = (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0);
76 memcpy (reloc_addr, (void *) (loadbase + sym->st_value), sym->st_size);
79 assert (! "unexpected dynamic reloc type");
86 elf_machine_rela (Elf32_Addr loadaddr, Elf32_Dyn *info[DT_NUM],
87 const Elf32_Rel *reloc, const Elf32_Sym *sym,
88 Elf32_Addr (*resolve) (const Elf32_Sym **ref,
89 Elf32_Addr reloc_addr,
92 _dl_signal_error (0, "Elf32_Rela relocation requested -- unused on "
97 /* Nonzero iff TYPE describes relocation of a PLT entry, so
98 PLT entries should not be allowed to define the value. */
99 #define elf_machine_pltrel_p(type) ((type) == R_???_JMP_SLOT)
102 /* Set up the loaded object described by L so its unrelocated PLT
103 entries will jump to the on-demand fixup code in dl-runtime.c. */
106 elf_machine_runtime_setup (struct link_map *l)
108 extern void _dl_runtime_resolve (Elf32_Word);
109 /* The GOT entries for functions in the PLT have not yet been filled
110 in. Their initial contents will arrange when called to push an
111 offset into the .rel.plt section, push _GLOBAL_OFFSET_TABLE_[1],
112 and then jump to _GLOBAL_OFFSET_TABLE[2]. */
113 Elf32_Addr *got = (Elf32_Addr *) l->l_info[DT_PLTGOT]->d_un.d_ptr;
114 got[1] = (Elf32_Addr) l; /* Identify this shared object. */
115 /* This function will get called to fix up the GOT entry indicated by
116 the offset on the stack, and then jump to the resolved address. */
117 got[2] = (Elf32_Addr) &_dl_runtime_resolve;
121 /* Initial entry point code for the dynamic linker.
122 The C function `_dl_start' is the real entry point;
123 its return value is the user program's entry point. */
125 #define RTLD_START #error need some startup code