1/* SPARC specific symbolic name handling.
2   Copyright (C) 2002, 2003, 2005, 2007, 2008 Red Hat, Inc.
3   This file is part of Red Hat elfutils.
4   Written by Jakub Jelinek <jakub@redhat.com>, 2002.
5
6   Red Hat elfutils is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by the
8   Free Software Foundation; version 2 of the License.
9
10   Red Hat elfutils is distributed in the hope that it will be useful, but
11   WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   General Public License for more details.
14
15   You should have received a copy of the GNU General Public License along
16   with Red Hat elfutils; if not, write to the Free Software Foundation,
17   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
18
19   Red Hat elfutils is an included package of the Open Invention Network.
20   An included package of the Open Invention Network is a package for which
21   Open Invention Network licensees cross-license their patents.  No patent
22   license is granted, either expressly or impliedly, by designation as an
23   included package.  Should you wish to participate in the Open Invention
24   Network licensing program, please visit www.openinventionnetwork.com
25   <http://www.openinventionnetwork.com>.  */
26
27#ifdef HAVE_CONFIG_H
28# include <config.h>
29#endif
30
31#include <elf.h>
32#include <stddef.h>
33
34#define BACKEND		sparc_
35#include "libebl_CPU.h"
36
37/* Check for the simple reloc types.  */
38Elf_Type
39sparc_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type)
40{
41  switch (type)
42    {
43    case R_SPARC_8:
44      return ELF_T_BYTE;
45    case R_SPARC_16:
46    case R_SPARC_UA16:
47      return ELF_T_HALF;
48    case R_SPARC_32:
49    case R_SPARC_UA32:
50      return ELF_T_WORD;
51    case R_SPARC_64:
52    case R_SPARC_UA64:
53      return ELF_T_XWORD;
54    default:
55      return ELF_T_NUM;
56    }
57}
58
59/* Check whether machine flags are valid.  */
60bool
61sparc_machine_flag_check (GElf_Word flags)
62{
63  return ((flags &~ (EF_SPARCV9_MM
64		     | EF_SPARC_LEDATA
65		     | EF_SPARC_32PLUS
66		     | EF_SPARC_SUN_US1
67		     | EF_SPARC_SUN_US3)) == 0);
68}
69
70bool
71sparc_check_special_section (Ebl *ebl,
72			     int ndx __attribute__ ((unused)),
73			     const GElf_Shdr *shdr,
74			     const char *sname __attribute__ ((unused)))
75{
76  if ((shdr->sh_flags & (SHF_WRITE | SHF_EXECINSTR))
77      == (SHF_WRITE | SHF_EXECINSTR))
78    {
79      /* This is ordinarily flagged, but is valid for a PLT on SPARC.
80
81	 Look for the SHT_DYNAMIC section and the DT_PLTGOT tag in it.
82	 Its d_ptr should match the .plt section's sh_addr.  */
83
84      Elf_Scn *scn = NULL;
85      while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
86	{
87	  GElf_Shdr scn_shdr;
88	  if (likely (gelf_getshdr (scn, &scn_shdr) != NULL)
89	      && scn_shdr.sh_type == SHT_DYNAMIC
90	      && scn_shdr.sh_entsize != 0)
91	    {
92	      Elf_Data *data = elf_getdata (scn, NULL);
93	      if (data != NULL)
94		for (size_t i = 0; i < data->d_size / scn_shdr.sh_entsize; ++i)
95		  {
96		    GElf_Dyn dyn;
97		    if (unlikely (gelf_getdyn (data, i, &dyn) == NULL))
98		      break;
99		    if (dyn.d_tag == DT_PLTGOT)
100		      return dyn.d_un.d_ptr == shdr->sh_addr;
101		  }
102	      break;
103	    }
104	}
105    }
106
107  return false;
108}
109
110const char *
111sparc_symbol_type_name (int type,
112			char *buf __attribute__ ((unused)),
113			size_t len __attribute__ ((unused)))
114{
115  switch (type)
116    {
117    case STT_SPARC_REGISTER:
118      return "SPARC_REGISTER";
119    }
120  return NULL;
121}
122
123const char *
124sparc_dynamic_tag_name (int64_t tag,
125			char *buf __attribute__ ((unused)),
126			size_t len __attribute__ ((unused)))
127{
128  switch (tag)
129    {
130    case DT_SPARC_REGISTER:
131      return "SPARC_REGISTER";
132    }
133  return NULL;
134}
135
136bool
137sparc_dynamic_tag_check (int64_t tag)
138{
139  switch (tag)
140    {
141    case DT_SPARC_REGISTER:
142      return true;
143    }
144  return false;
145}
146