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Diffstat (limited to 'src/libdw/dwarf_getabbrev.c')
| -rw-r--r-- | src/libdw/dwarf_getabbrev.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/src/libdw/dwarf_getabbrev.c b/src/libdw/dwarf_getabbrev.c deleted file mode 100644 index 0efde45b..00000000 --- a/src/libdw/dwarf_getabbrev.c +++ /dev/null @@ -1,165 +0,0 @@ -/* Get abbreviation at given offset. - Copyright (C) 2003, 2004, 2005, 2006, 2014 Red Hat, Inc. - This file is part of elfutils. - Written by Ulrich Drepper <drepper@redhat.com>, 2003. - - This file is free software; you can redistribute it and/or modify - it under the terms of either - - * the GNU Lesser General Public License as published by the Free - Software Foundation; either version 3 of the License, or (at - your option) any later version - - or - - * the GNU General Public License as published by the Free - Software Foundation; either version 2 of the License, or (at - your option) any later version - - or both in parallel, as here. - - elfutils 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 copies of the GNU General Public License and - the GNU Lesser General Public License along with this program. If - not, see <http://www.gnu.org/licenses/>. */ - -#ifdef HAVE_CONFIG_H -# include <config.h> -#endif - -#include <dwarf.h> -#include "libdwP.h" - - -Dwarf_Abbrev * -internal_function -__libdw_getabbrev (dbg, cu, offset, lengthp, result) - Dwarf *dbg; - struct Dwarf_CU *cu; - Dwarf_Off offset; - size_t *lengthp; - Dwarf_Abbrev *result; -{ - /* Don't fail if there is not .debug_abbrev section. */ - if (dbg->sectiondata[IDX_debug_abbrev] == NULL) - return NULL; - - if (offset >= dbg->sectiondata[IDX_debug_abbrev]->d_size) - { - __libdw_seterrno (DWARF_E_INVALID_OFFSET); - return NULL; - } - - const unsigned char *abbrevp - = (unsigned char *) dbg->sectiondata[IDX_debug_abbrev]->d_buf + offset; - - if (*abbrevp == '\0') - /* We are past the last entry. */ - return DWARF_END_ABBREV; - - /* 7.5.3 Abbreviations Tables - - [...] Each declaration begins with an unsigned LEB128 number - representing the abbreviation code itself. [...] The - abbreviation code is followed by another unsigned LEB128 - number that encodes the entry's tag. [...] - - [...] Following the tag encoding is a 1-byte value that - determines whether a debugging information entry using this - abbreviation has child entries or not. [...] - - [...] Finally, the child encoding is followed by a series of - attribute specifications. Each attribute specification - consists of two parts. The first part is an unsigned LEB128 - number representing the attribute's name. The second part is - an unsigned LEB128 number representing the attribute's form. */ - const unsigned char *end = (dbg->sectiondata[IDX_debug_abbrev]->d_buf - + dbg->sectiondata[IDX_debug_abbrev]->d_size); - const unsigned char *start_abbrevp = abbrevp; - unsigned int code; - get_uleb128 (code, abbrevp, end); - - /* Check whether this code is already in the hash table. */ - bool foundit = false; - Dwarf_Abbrev *abb = NULL; - if (cu == NULL - || (abb = Dwarf_Abbrev_Hash_find (&cu->abbrev_hash, code, NULL)) == NULL) - { - if (result == NULL) - abb = libdw_typed_alloc (dbg, Dwarf_Abbrev); - else - abb = result; - } - else - { - foundit = true; - - if (unlikely (abb->offset != offset)) - { - /* A duplicate abbrev code at a different offset, - that should never happen. */ - invalid: - __libdw_seterrno (DWARF_E_INVALID_DWARF); - return NULL; - } - - /* If the caller doesn't need the length we are done. */ - if (lengthp == NULL) - goto out; - } - - /* If there is already a value in the hash table we are going to - overwrite its content. This must not be a problem, since the - content better be the same. */ - abb->code = code; - if (abbrevp >= end) - goto invalid; - get_uleb128 (abb->tag, abbrevp, end); - if (abbrevp + 1 >= end) - goto invalid; - abb->has_children = *abbrevp++ == DW_CHILDREN_yes; - abb->attrp = (unsigned char *) abbrevp; - abb->offset = offset; - - /* Skip over all the attributes and count them while doing so. */ - abb->attrcnt = 0; - unsigned int attrname; - unsigned int attrform; - do - { - if (abbrevp >= end) - goto invalid; - get_uleb128 (attrname, abbrevp, end); - if (abbrevp >= end) - goto invalid; - get_uleb128 (attrform, abbrevp, end); - } - while (attrname != 0 && attrform != 0 && ++abb->attrcnt); - - /* Return the length to the caller if she asked for it. */ - if (lengthp != NULL) - *lengthp = abbrevp - start_abbrevp; - - /* Add the entry to the hash table. */ - if (cu != NULL && ! foundit) - (void) Dwarf_Abbrev_Hash_insert (&cu->abbrev_hash, abb->code, abb); - - out: - return abb; -} - - -Dwarf_Abbrev * -dwarf_getabbrev (die, offset, lengthp) - Dwarf_Die *die; - Dwarf_Off offset; - size_t *lengthp; -{ - return __libdw_getabbrev (die->cu->dbg, die->cu, - die->cu->orig_abbrev_offset + offset, lengthp, - NULL); -} |