Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 1 | /* Test program for CFI handling. |
Mark Wielaard | 292b178 | 2013-08-27 15:40:56 +0200 | [diff] [blame] | 2 | Copyright (C) 2009-2010, 2013 Red Hat, Inc. |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 3 | This file is part of elfutils. |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 4 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 5 | This file is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3 of the License, or |
| 8 | (at your option) any later version. |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 9 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 10 | elfutils is distributed in the hope that it will be useful, but |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 11 | WITHOUT ANY WARRANTY; without even the implied warranty of |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 14 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 17 | |
| 18 | #include <config.h> |
| 19 | #include <assert.h> |
| 20 | #include <inttypes.h> |
| 21 | #include ELFUTILS_HEADER(dwfl) |
| 22 | #include <dwarf.h> |
| 23 | #include <argp.h> |
| 24 | #include <stdio.h> |
| 25 | #include <stdio_ext.h> |
| 26 | #include <locale.h> |
| 27 | #include <stdlib.h> |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 28 | #include <string.h> |
| 29 | |
Mark Wielaard | 292b178 | 2013-08-27 15:40:56 +0200 | [diff] [blame] | 30 | #include "../libdw/known-dwarf.h" |
| 31 | |
| 32 | static const char * |
| 33 | op_name (unsigned int code) |
| 34 | { |
| 35 | static const char *const known[] = |
| 36 | { |
| 37 | #define ONE_KNOWN_DW_OP_DESC(NAME, CODE, DESC) ONE_KNOWN_DW_OP (NAME, CODE) |
| 38 | #define ONE_KNOWN_DW_OP(NAME, CODE) [CODE] = #NAME, |
| 39 | ALL_KNOWN_DW_OP |
| 40 | #undef ONE_KNOWN_DW_OP |
| 41 | #undef ONE_KNOWN_DW_OP_DESC |
| 42 | }; |
| 43 | |
| 44 | if (likely (code < sizeof (known) / sizeof (known[0]))) |
| 45 | return known[code]; |
| 46 | |
| 47 | return NULL; |
| 48 | } |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 49 | |
| 50 | static void |
| 51 | print_detail (int result, const Dwarf_Op *ops, size_t nops, Dwarf_Addr bias) |
| 52 | { |
| 53 | if (result < 0) |
| 54 | printf ("indeterminate (%s)\n", dwarf_errmsg (-1)); |
| 55 | else if (nops == 0) |
Mark Wielaard | 292b178 | 2013-08-27 15:40:56 +0200 | [diff] [blame] | 56 | printf ("%s\n", ops == NULL ? "same_value" : "undefined"); |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 57 | else |
| 58 | { |
| 59 | printf ("%s expression:", result == 0 ? "location" : "value"); |
| 60 | for (size_t i = 0; i < nops; ++i) |
| 61 | { |
Mark Wielaard | 292b178 | 2013-08-27 15:40:56 +0200 | [diff] [blame] | 62 | printf (" %s", op_name(ops[i].atom)); |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 63 | if (ops[i].number2 == 0) |
| 64 | { |
| 65 | if (ops[i].atom == DW_OP_addr) |
| 66 | printf ("(%#" PRIx64 ")", ops[i].number + bias); |
| 67 | else if (ops[i].number != 0) |
| 68 | printf ("(%" PRId64 ")", ops[i].number); |
| 69 | } |
| 70 | else |
| 71 | printf ("(%" PRId64 ",%" PRId64 ")", |
| 72 | ops[i].number, ops[i].number2); |
| 73 | } |
| 74 | puts (""); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | struct stuff |
| 79 | { |
| 80 | Dwarf_Frame *frame; |
| 81 | Dwarf_Addr bias; |
| 82 | }; |
| 83 | |
| 84 | static int |
| 85 | print_register (void *arg, |
| 86 | int regno, |
| 87 | const char *setname, |
| 88 | const char *prefix, |
| 89 | const char *regname, |
| 90 | int bits __attribute__ ((unused)), |
| 91 | int type __attribute__ ((unused))) |
| 92 | { |
| 93 | struct stuff *stuff = arg; |
| 94 | |
| 95 | printf ("\t%s reg%u (%s%s): ", setname, regno, prefix, regname); |
| 96 | |
| 97 | Dwarf_Op ops_mem[2]; |
| 98 | Dwarf_Op *ops; |
| 99 | size_t nops; |
| 100 | int result = dwarf_frame_register (stuff->frame, regno, ops_mem, &ops, &nops); |
| 101 | print_detail (result, ops, nops, stuff->bias); |
| 102 | |
| 103 | return DWARF_CB_OK; |
| 104 | } |
| 105 | |
| 106 | static int |
| 107 | handle_cfi (Dwfl *dwfl, const char *which, Dwarf_CFI *cfi, |
| 108 | GElf_Addr pc, struct stuff *stuff) |
| 109 | { |
Mark Wielaard | 79b9181 | 2013-08-28 21:54:58 +0200 | [diff] [blame^] | 110 | if (cfi == NULL) |
| 111 | { |
| 112 | printf ("handle_cfi no CFI (%s): %s\n", which, dwarf_errmsg (-1)); |
| 113 | return -1; |
| 114 | } |
| 115 | |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 116 | int result = dwarf_cfi_addrframe (cfi, pc - stuff->bias, &stuff->frame); |
| 117 | if (result != 0) |
| 118 | { |
Mark Wielaard | d3f1645 | 2013-08-28 18:10:44 +0200 | [diff] [blame] | 119 | printf ("dwarf_cfi_addrframe (%s): %s\n", which, dwarf_errmsg (-1)); |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 120 | return 1; |
| 121 | } |
| 122 | |
| 123 | Dwarf_Addr start = pc; |
| 124 | Dwarf_Addr end = pc; |
| 125 | bool signalp; |
| 126 | int ra_regno = dwarf_frame_info (stuff->frame, &start, &end, &signalp); |
| 127 | if (ra_regno >= 0) |
| 128 | { |
| 129 | start += stuff->bias; |
| 130 | end += stuff->bias; |
| 131 | } |
| 132 | |
| 133 | printf ("%s has %#" PRIx64 " => [%#" PRIx64 ", %#" PRIx64 "):\n", |
| 134 | which, pc, start, end); |
| 135 | |
| 136 | if (ra_regno < 0) |
| 137 | printf ("\treturn address register unavailable (%s)\n", |
| 138 | dwarf_errmsg (0)); |
| 139 | else |
| 140 | printf ("\treturn address in reg%u%s\n", |
| 141 | ra_regno, signalp ? " (signal frame)" : ""); |
| 142 | |
Mark Wielaard | 292b178 | 2013-08-27 15:40:56 +0200 | [diff] [blame] | 143 | // Point cfa_ops to dummy to match print_detail expectations. |
| 144 | // (nops == 0 && cfa_ops != NULL => "undefined") |
| 145 | Dwarf_Op dummy; |
| 146 | Dwarf_Op *cfa_ops = &dummy; |
Roland McGrath | af80014 | 2009-07-22 13:55:50 -0700 | [diff] [blame] | 147 | size_t cfa_nops; |
| 148 | result = dwarf_frame_cfa (stuff->frame, &cfa_ops, &cfa_nops); |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 149 | |
| 150 | printf ("\tCFA "); |
Roland McGrath | af80014 | 2009-07-22 13:55:50 -0700 | [diff] [blame] | 151 | print_detail (result, cfa_ops, cfa_nops, stuff->bias); |
Roland McGrath | 3c84db3 | 2009-06-24 17:41:40 -0700 | [diff] [blame] | 152 | |
| 153 | (void) dwfl_module_register_names (dwfl_addrmodule (dwfl, pc), |
| 154 | &print_register, stuff); |
| 155 | |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | static int |
| 160 | handle_address (GElf_Addr pc, Dwfl *dwfl) |
| 161 | { |
| 162 | Dwfl_Module *mod = dwfl_addrmodule (dwfl, pc); |
| 163 | |
| 164 | struct stuff stuff; |
| 165 | return (handle_cfi (dwfl, ".eh_frame", |
| 166 | dwfl_module_eh_cfi (mod, &stuff.bias), pc, &stuff) |
| 167 | & handle_cfi (dwfl, ".debug_frame", |
| 168 | dwfl_module_dwarf_cfi (mod, &stuff.bias), pc, &stuff)); |
| 169 | } |
| 170 | |
| 171 | int |
| 172 | main (int argc, char *argv[]) |
| 173 | { |
| 174 | int remaining; |
| 175 | |
| 176 | /* Set locale. */ |
| 177 | (void) setlocale (LC_ALL, ""); |
| 178 | |
| 179 | Dwfl *dwfl = NULL; |
| 180 | (void) argp_parse (dwfl_standard_argp (), argc, argv, 0, &remaining, &dwfl); |
| 181 | assert (dwfl != NULL); |
| 182 | |
| 183 | int result = 0; |
| 184 | |
| 185 | /* Now handle the addresses. In case none are given on the command |
| 186 | line, read from stdin. */ |
| 187 | if (remaining == argc) |
| 188 | { |
| 189 | /* We use no threads here which can interfere with handling a stream. */ |
| 190 | (void) __fsetlocking (stdin, FSETLOCKING_BYCALLER); |
| 191 | |
| 192 | char *buf = NULL; |
| 193 | size_t len = 0; |
| 194 | while (!feof_unlocked (stdin)) |
| 195 | { |
| 196 | if (getline (&buf, &len, stdin) < 0) |
| 197 | break; |
| 198 | |
| 199 | char *endp; |
| 200 | uintmax_t addr = strtoumax (buf, &endp, 0); |
| 201 | if (endp != buf) |
| 202 | result |= handle_address (addr, dwfl); |
| 203 | else |
| 204 | result = 1; |
| 205 | } |
| 206 | |
| 207 | free (buf); |
| 208 | } |
| 209 | else |
| 210 | { |
| 211 | do |
| 212 | { |
| 213 | char *endp; |
| 214 | uintmax_t addr = strtoumax (argv[remaining], &endp, 0); |
| 215 | if (endp != argv[remaining]) |
| 216 | result |= handle_address (addr, dwfl); |
| 217 | else |
| 218 | result = 1; |
| 219 | } |
| 220 | while (++remaining < argc); |
| 221 | } |
| 222 | |
| 223 | dwfl_end (dwfl); |
| 224 | |
| 225 | return result; |
| 226 | } |