1/* Print contents of object file note.
2   Copyright (C) 2002, 2007, 2009, 2011 Red Hat, Inc.
3   This file is part of elfutils.
4   Written by Ulrich Drepper <drepper@redhat.com>, 2002.
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 <inttypes.h>
35#include <stdio.h>
36#include <string.h>
37#include <libeblP.h>
38
39
40void
41ebl_object_note (ebl, name, type, descsz, desc)
42     Ebl *ebl;
43     const char *name;
44     uint32_t type;
45     uint32_t descsz;
46     const char *desc;
47{
48  if (! ebl->object_note (name, type, descsz, desc))
49    /* The machine specific function did not know this type.  */
50
51    if (strcmp ("stapsdt", name) == 0)
52      {
53	if (type != 3)
54	  {
55	    printf (gettext ("unknown SDT version %u\n"), type);
56	    return;
57	  }
58
59	/* Descriptor starts with three addresses, pc, base ref and
60	   semaphore.  Then three zero terminated strings provider,
61	   name and arguments.  */
62
63	union
64	{
65	  Elf64_Addr a64[3];
66	  Elf32_Addr a32[3];
67	} addrs;
68
69	size_t addrs_size = gelf_fsize (ebl->elf, ELF_T_ADDR, 3, EV_CURRENT);
70	if (descsz < addrs_size + 3)
71	  {
72	  invalid_sdt:
73	    printf (gettext ("invalid SDT probe descriptor\n"));
74	    return;
75	  }
76
77	Elf_Data src =
78	  {
79	    .d_type = ELF_T_ADDR, .d_version = EV_CURRENT,
80	    .d_buf = (void *) desc, .d_size = addrs_size
81	  };
82
83	Elf_Data dst =
84	  {
85	    .d_type = ELF_T_ADDR, .d_version = EV_CURRENT,
86	    .d_buf = &addrs, .d_size = addrs_size
87	  };
88
89	if (gelf_xlatetom (ebl->elf, &dst, &src,
90			   elf_getident (ebl->elf, NULL)[EI_DATA]) == NULL)
91	  {
92	    printf ("%s\n", elf_errmsg (-1));
93	    return;
94	  }
95
96	const char *provider = desc + addrs_size;
97	const char *pname = memchr (provider, '\0', desc + descsz - provider);
98	if (pname == NULL)
99	  goto invalid_sdt;
100
101	++pname;
102	const char *args = memchr (pname, '\0', desc + descsz - pname);
103	if (args == NULL ||
104	    memchr (++args, '\0', desc + descsz - pname) != desc + descsz - 1)
105	  goto invalid_sdt;
106
107	GElf_Addr pc;
108	GElf_Addr base;
109	GElf_Addr sem;
110	if (gelf_getclass (ebl->elf) == ELFCLASS32)
111	  {
112	    pc = addrs.a32[0];
113	    base = addrs.a32[1];
114	    sem = addrs.a32[2];
115	  }
116	else
117	  {
118	    pc = addrs.a64[0];
119	    base = addrs.a64[1];
120	    sem = addrs.a64[2];
121	  }
122
123	printf (gettext ("    PC: "));
124	printf ("%#" PRIx64 ",", pc);
125	printf (gettext (" Base: "));
126	printf ("%#" PRIx64 ",", base);
127	printf (gettext (" Semaphore: "));
128	printf ("%#" PRIx64 "\n", sem);
129	printf (gettext ("    Provider: "));
130	printf ("%s,", provider);
131	printf (gettext (" Name: "));
132	printf ("%s,", pname);
133	printf (gettext (" Args: "));
134	printf ("'%s'\n", args);
135	return;
136      }
137
138    switch (type)
139      {
140      case NT_GNU_BUILD_ID:
141	if (strcmp (name, "GNU") == 0 && descsz > 0)
142	  {
143	    printf (gettext ("    Build ID: "));
144	    uint_fast32_t i;
145	    for (i = 0; i < descsz - 1; ++i)
146	      printf ("%02" PRIx8, (uint8_t) desc[i]);
147	    printf ("%02" PRIx8 "\n", (uint8_t) desc[i]);
148	  }
149	break;
150
151      case NT_GNU_GOLD_VERSION:
152	if (strcmp (name, "GNU") == 0 && descsz > 0)
153	  /* A non-null terminated version string.  */
154	  printf (gettext ("    Linker version: %.*s\n"),
155		  (int) descsz, desc);
156	break;
157
158      case NT_GNU_ABI_TAG:
159	if (strcmp (name, "GNU") == 0 && descsz >= 8 && descsz % 4 == 0)
160	  {
161	    Elf_Data in =
162	      {
163		.d_version = EV_CURRENT,
164		.d_type = ELF_T_WORD,
165		.d_size = descsz,
166		.d_buf = (void *) desc
167	      };
168	    uint32_t buf[descsz / 4];
169	    Elf_Data out =
170	      {
171		.d_version = EV_CURRENT,
172		.d_type = ELF_T_WORD,
173		.d_size = descsz,
174		.d_buf = buf
175	      };
176
177	    if (elf32_xlatetom (&out, &in, ebl->data) != NULL)
178	      {
179		const char *os;
180		switch (buf[0])
181		  {
182		  case ELF_NOTE_OS_LINUX:
183		    os = "Linux";
184		    break;
185
186		  case ELF_NOTE_OS_GNU:
187		    os = "GNU";
188		    break;
189
190		  case ELF_NOTE_OS_SOLARIS2:
191		    os = "Solaris";
192		    break;
193
194		  case ELF_NOTE_OS_FREEBSD:
195		    os = "FreeBSD";
196		    break;
197
198		  default:
199		    os = "???";
200		    break;
201		  }
202
203		printf (gettext ("    OS: %s, ABI: "), os);
204		for (size_t cnt = 1; cnt < descsz / 4; ++cnt)
205		  {
206		    if (cnt > 1)
207		      putchar_unlocked ('.');
208		    printf ("%" PRIu32, buf[cnt]);
209		  }
210		putchar_unlocked ('\n');
211	      }
212	    break;
213	  }
214	/* FALLTHROUGH */
215
216      default:
217	/* Unknown type.  */
218	break;
219      }
220}
221