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author | Cyrille Bagard <nocbos@gmail.com> | 2008-08-10 12:25:22 (GMT) |
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committer | Cyrille Bagard <nocbos@gmail.com> | 2008-08-10 12:25:22 (GMT) |
commit | a13b6baeeea114919d0e9eb25e35657b144437dc (patch) | |
tree | 8b22b991f2424b83db81ecc1ac063c5949adfb0b /src/format/dwarf/utils.c | |
parent | 904476ddf621d9513bf90a3fa396d2e6c1ea2952 (diff) |
Read all the DWARF abbreviations.
git-svn-id: svn://svn.gna.org/svn/chrysalide/trunk@16 abbe820e-26c8-41b2-8c08-b7b2b41f8b0a
Diffstat (limited to 'src/format/dwarf/utils.c')
-rw-r--r-- | src/format/dwarf/utils.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/format/dwarf/utils.c b/src/format/dwarf/utils.c new file mode 100644 index 0000000..b5dbf6b --- /dev/null +++ b/src/format/dwarf/utils.c @@ -0,0 +1,71 @@ + +/* OpenIDA - Outil d'analyse de fichiers binaires + * utils.h - prototypes pour les fonctions d'aisance vis à vis du format DWARF + * + * Copyright (C) 2008 Cyrille Bagard + * + * This file is part of OpenIDA. + * + * OpenIDA is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * OpenIDA is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with Foobar. If not, see <http://www.gnu.org/licenses/>. + */ + + +#include "utils.h" + + +#include "dwarf-int.h" + + + +/****************************************************************************** +* * +* Paramètres : format = informations de débogage à consulter. * +* pos = tête de lecture à mettre à jour. [OUT] * +* value = valeur au format LEB128 lue. [OUT] * +* * +* Description : Lit une valeur Little Endian Base 128 signée. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +bool read_leb128(dwarf_format *format, off_t *pos, int64_t *value) +{ + int shift; /* Décallage à appliquer */ + off_t i; /* Boucle de parcours */ + + *value = 0; + + for (i = 0; i < 8; i++) + { + /* On évite les débordements... */ + if ((*pos + i) >= DBG_FORMAT(format)->length) return false; + + *value |= (DBG_FORMAT(format)->content[*pos + i] & 0x7f) << shift; + + shift += 7; + (*pos)++; + + if ((DBG_FORMAT(format)->content[*pos] & 0x80) == 0x00) break; + + } + + if ((shift < 64) && (DBG_FORMAT(format)->content[*pos - 1] & 0x40) == 0x40) + *value |= - (1 << shift); + + return (i < 8); + +} |