1 /* Initialization of PPC64 specific backend library.
2 Copyright (C) 2004, 2005, 2006, 2007, 2008, 2013, 2014 Red Hat, Inc.
3 This file is part of elfutils.
4 Written by Ulrich Drepper <drepper@redhat.com>, 2004.
5
6 This file is free software; you can redistribute it and/or modify
7 it under the terms of either
8
9 * the GNU Lesser General Public License as published by the Free
10 Software Foundation; either version 3 of the License, or (at
11 your option) any later version
12
13 or
14
15 * the GNU General Public License as published by the Free
16 Software Foundation; either version 2 of the License, or (at
17 your option) any later version
18
19 or both in parallel, as here.
20
21 elfutils is distributed in the hope that it will be useful, but
22 WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 General Public License for more details.
25
26 You should have received copies of the GNU General Public License and
27 the GNU Lesser General Public License along with this program. If
28 not, see <http://www.gnu.org/licenses/>. */
29
30 #ifdef HAVE_CONFIG_H
31 # include <config.h>
32 #endif
33
34 #include <string.h>
35
36 #define BACKEND ppc64_
37 #define RELOC_PREFIX R_PPC64_
38 #include "libebl_CPU.h"
39
40 /* This defines the common reloc hooks based on ppc64_reloc.def. */
41 #include "common-reloc.c"
42
43
44 const char *
ppc64_init(Elf * elf,GElf_Half machine,Ebl * eh,size_t ehlen)45 ppc64_init (Elf *elf __attribute__ ((unused)),
46 GElf_Half machine __attribute__ ((unused)),
47 Ebl *eh,
48 size_t ehlen)
49 {
50 /* Check whether the Elf_BH object has a sufficent size. */
51 if (ehlen < sizeof (Ebl))
52 return NULL;
53
54 /* We handle it. */
55 eh->name = "PowerPC 64-bit";
56 ppc64_init_reloc (eh);
57 HOOK (eh, reloc_simple_type);
58 HOOK (eh, dynamic_tag_name);
59 HOOK (eh, dynamic_tag_check);
60 HOOK (eh, machine_flag_check);
61 HOOK (eh, copy_reloc_p);
62 HOOK (eh, check_special_symbol);
63 HOOK (eh, check_st_other_bits);
64 HOOK (eh, bss_plt_p);
65 HOOK (eh, return_value_location);
66 HOOK (eh, register_info);
67 HOOK (eh, syscall_abi);
68 HOOK (eh, core_note);
69 HOOK (eh, auxv_info);
70 HOOK (eh, check_object_attribute);
71 HOOK (eh, abi_cfi);
72 /* gcc/config/ #define DWARF_FRAME_REGISTERS. */
73 eh->frame_nregs = (114 - 1) + 32;
74 HOOK (eh, set_initial_registers_tid);
75 HOOK (eh, dwarf_to_regno);
76 HOOK (eh, unwind);
77 HOOK (eh, resolve_sym_value);
78
79 /* Find the function descriptor .opd table for resolve_sym_value. */
80 if (elf != NULL)
81 {
82 GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (elf, &ehdr_mem);
83 size_t shstrndx;
84 if (ehdr != NULL && ehdr->e_type != ET_REL
85 && elf_getshdrstrndx (elf, &shstrndx) == 0)
86 {
87 /* We could also try through DT_PPC64_OPD and DT_PPC64_OPDSZ. */
88 GElf_Shdr opd_shdr_mem, *opd_shdr;
89 Elf_Scn *scn = NULL;
90 while ((scn = elf_nextscn (elf, scn)) != NULL)
91 {
92 opd_shdr = gelf_getshdr (scn, &opd_shdr_mem);
93 if (opd_shdr != NULL
94 && (opd_shdr->sh_flags & SHF_ALLOC) != 0
95 && opd_shdr->sh_type == SHT_PROGBITS
96 && opd_shdr->sh_size > 0)
97 {
98 const char *name = elf_strptr (elf, shstrndx,
99 opd_shdr->sh_name);
100 if (name != NULL && strcmp (name, ".opd") == 0)
101 {
102 eh->fd_addr = opd_shdr->sh_addr;
103 eh->fd_data = elf_getdata (scn, NULL);
104 break;
105 }
106 }
107 }
108 }
109 }
110
111 return MODVERSION;
112 }
113