1 /* Print contents of object file note. 2 Copyright (C) 2002, 2007, 2009, 2011, 2015, 2016 Red Hat, Inc. 3 This file is part of elfutils. 4 Written by Ulrich Drepper <drepper (at) 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 <stdlib.h> 37 #include <string.h> 38 #include <libeblP.h> 39 40 41 void 42 ebl_object_note (Ebl *ebl, const char *name, uint32_t type, 43 uint32_t descsz, const char *desc) 44 { 45 if (! ebl->object_note (name, type, descsz, desc)) 46 { 47 /* The machine specific function did not know this type. */ 48 49 if (strcmp ("stapsdt", name) == 0) 50 { 51 if (type != 3) 52 { 53 printf (gettext ("unknown SDT version %u\n"), type); 54 return; 55 } 56 57 /* Descriptor starts with three addresses, pc, base ref and 58 semaphore. Then three zero terminated strings provider, 59 name and arguments. */ 60 61 union 62 { 63 Elf64_Addr a64[3]; 64 Elf32_Addr a32[3]; 65 } addrs; 66 67 size_t addrs_size = gelf_fsize (ebl->elf, ELF_T_ADDR, 3, EV_CURRENT); 68 if (descsz < addrs_size + 3) 69 { 70 invalid_sdt: 71 printf (gettext ("invalid SDT probe descriptor\n")); 72 return; 73 } 74 75 Elf_Data src = 76 { 77 .d_type = ELF_T_ADDR, .d_version = EV_CURRENT, 78 .d_buf = (void *) desc, .d_size = addrs_size 79 }; 80 81 Elf_Data dst = 82 { 83 .d_type = ELF_T_ADDR, .d_version = EV_CURRENT, 84 .d_buf = &addrs, .d_size = addrs_size 85 }; 86 87 if (gelf_xlatetom (ebl->elf, &dst, &src, 88 elf_getident (ebl->elf, NULL)[EI_DATA]) == NULL) 89 { 90 printf ("%s\n", elf_errmsg (-1)); 91 return; 92 } 93 94 const char *provider = desc + addrs_size; 95 const char *pname = memchr (provider, '\0', desc + descsz - provider); 96 if (pname == NULL) 97 goto invalid_sdt; 98 99 ++pname; 100 const char *args = memchr (pname, '\0', desc + descsz - pname); 101 if (args == NULL || 102 memchr (++args, '\0', desc + descsz - pname) != desc + descsz - 1) 103 goto invalid_sdt; 104 105 GElf_Addr pc; 106 GElf_Addr base; 107 GElf_Addr sem; 108 if (gelf_getclass (ebl->elf) == ELFCLASS32) 109 { 110 pc = addrs.a32[0]; 111 base = addrs.a32[1]; 112 sem = addrs.a32[2]; 113 } 114 else 115 { 116 pc = addrs.a64[0]; 117 base = addrs.a64[1]; 118 sem = addrs.a64[2]; 119 } 120 121 printf (gettext (" PC: ")); 122 printf ("%#" PRIx64 ",", pc); 123 printf (gettext (" Base: ")); 124 printf ("%#" PRIx64 ",", base); 125 printf (gettext (" Semaphore: ")); 126 printf ("%#" PRIx64 "\n", sem); 127 printf (gettext (" Provider: ")); 128 printf ("%s,", provider); 129 printf (gettext (" Name: ")); 130 printf ("%s,", pname); 131 printf (gettext (" Args: ")); 132 printf ("'%s'\n", args); 133 return; 134 } 135 136 switch (type) 137 { 138 case NT_GNU_BUILD_ID: 139 if (strcmp (name, "GNU") == 0 && descsz > 0) 140 { 141 printf (gettext (" Build ID: ")); 142 uint_fast32_t i; 143 for (i = 0; i < descsz - 1; ++i) 144 printf ("%02" PRIx8, (uint8_t) desc[i]); 145 printf ("%02" PRIx8 "\n", (uint8_t) desc[i]); 146 } 147 break; 148 149 case NT_GNU_GOLD_VERSION: 150 if (strcmp (name, "GNU") == 0 && descsz > 0) 151 /* A non-null terminated version string. */ 152 printf (gettext (" Linker version: %.*s\n"), 153 (int) descsz, desc); 154 break; 155 156 case NT_GNU_ABI_TAG: 157 if (strcmp (name, "GNU") == 0 && descsz >= 8 && descsz % 4 == 0) 158 { 159 Elf_Data in = 160 { 161 .d_version = EV_CURRENT, 162 .d_type = ELF_T_WORD, 163 .d_size = descsz, 164 .d_buf = (void *) desc 165 }; 166 /* Normally NT_GNU_ABI_TAG is just 4 words (16 bytes). If it 167 is much (4*) larger dynamically allocate memory to convert. */ 168 #define FIXED_TAG_BYTES 16 169 uint32_t sbuf[FIXED_TAG_BYTES]; 170 uint32_t *buf; 171 if (unlikely (descsz / 4 > FIXED_TAG_BYTES)) 172 { 173 buf = malloc (descsz); 174 if (unlikely (buf == NULL)) 175 return; 176 } 177 else 178 buf = sbuf; 179 Elf_Data out = 180 { 181 .d_version = EV_CURRENT, 182 .d_type = ELF_T_WORD, 183 .d_size = descsz, 184 .d_buf = buf 185 }; 186 187 if (elf32_xlatetom (&out, &in, ebl->data) != NULL) 188 { 189 const char *os; 190 switch (buf[0]) 191 { 192 case ELF_NOTE_OS_LINUX: 193 os = "Linux"; 194 break; 195 196 case ELF_NOTE_OS_GNU: 197 os = "GNU"; 198 break; 199 200 case ELF_NOTE_OS_SOLARIS2: 201 os = "Solaris"; 202 break; 203 204 case ELF_NOTE_OS_FREEBSD: 205 os = "FreeBSD"; 206 break; 207 208 default: 209 os = "???"; 210 break; 211 } 212 213 printf (gettext (" OS: %s, ABI: "), os); 214 for (size_t cnt = 1; cnt < descsz / 4; ++cnt) 215 { 216 if (cnt > 1) 217 putchar_unlocked ('.'); 218 printf ("%" PRIu32, buf[cnt]); 219 } 220 putchar_unlocked ('\n'); 221 } 222 if (descsz / 4 > FIXED_TAG_BYTES) 223 free (buf); 224 break; 225 } 226 /* FALLTHROUGH */ 227 228 default: 229 /* Unknown type. */ 230 break; 231 } 232 } 233 } 234
