1 /* Get attributes of the DIE. 2 Copyright (C) 2004 Red Hat, Inc. 3 Written by Ulrich Drepper <drepper (at) redhat.com>, 2004. 4 5 This program is Open Source software; you can redistribute it and/or 6 modify it under the terms of the Open Software License version 1.0 as 7 published by the Open Source Initiative. 8 9 You should have received a copy of the Open Software License along 10 with this program; if not, you may obtain a copy of the Open Software 11 License version 1.0 from http://www.opensource.org/licenses/osl.php or 12 by writing the Open Source Initiative c/o Lawrence Rosen, Esq., 13 3001 King Ranch Road, Ukiah, CA 95482. */ 14 15 #ifdef HAVE_CONFIG_H 16 # include <config.h> 17 #endif 18 19 #include "libdwP.h" 20 21 22 ptrdiff_t 23 dwarf_getattrs (Dwarf_Die *die, int (*callback) (Dwarf_Attribute *, void *), 24 void *arg, ptrdiff_t offset) 25 { 26 if (die == NULL) 27 return -1l; 28 29 unsigned char *die_addr = die->addr; 30 31 /* Get the abbreviation code. */ 32 unsigned int u128; 33 get_uleb128 (u128, die_addr); 34 35 if (die->abbrev == NULL) 36 /* Find the abbreviation. */ 37 die->abbrev = __libdw_findabbrev (die->cu, u128); 38 39 if (die->abbrev == (Dwarf_Abbrev *) -1l) 40 { 41 __libdw_seterrno (DWARF_E_INVALID_DWARF); 42 return -1l; 43 } 44 45 /* This is where the attributes start. */ 46 unsigned char *attrp = die->abbrev->attrp + offset; 47 48 /* Go over the list of attributes. */ 49 Dwarf *dbg = die->cu->dbg; 50 while (1) 51 { 52 /* Are we still in bounds? */ 53 if (unlikely (attrp 54 >= ((unsigned char *) dbg->sectiondata[IDX_debug_abbrev]->d_buf 55 + dbg->sectiondata[IDX_debug_abbrev]->d_size))) 56 { 57 __libdw_seterrno (DWARF_E_INVALID_DWARF); 58 return -1; 59 } 60 61 /* Get attribute name and form. */ 62 Dwarf_Attribute attr; 63 // XXX Fix bound checks 64 get_uleb128 (attr.code, attrp); 65 get_uleb128 (attr.form, attrp); 66 67 /* We can stop if we found the attribute with value zero. */ 68 if (attr.code == 0 && attr.form == 0) 69 return 0; 70 71 /* Fill in the rest. */ 72 attr.valp = die_addr; 73 attr.cu = die->cu; 74 75 /* Now call the callback function. */ 76 if (callback (&attr, arg) != DWARF_CB_OK) 77 return attrp - die->abbrev->attrp; 78 79 /* Skip over the rest of this attribute (if there is any). */ 80 if (attr.form != 0) 81 { 82 size_t len = __libdw_form_val_len (dbg, die->cu, attr.form, 83 die_addr); 84 85 if (unlikely (len == (size_t) -1l)) 86 /* Something wrong with the file. */ 87 return -1l; 88 89 // XXX We need better boundary checks. 90 die_addr += len; 91 } 92 } 93 /* NOTREACHED */ 94 } 95
