| /* Return location list entry. |
| Copyright (C) 2001, 2002 Red Hat, Inc. |
| Written by Ulrich Drepper <drepper@redhat.com>, 2001. |
| |
| This program is Open Source software; you can redistribute it and/or |
| modify it under the terms of the Open Software License version 1.0 as |
| published by the Open Source Initiative. |
| |
| You should have received a copy of the Open Software License along |
| with this program; if not, you may obtain a copy of the Open Software |
| License version 1.0 from http://www.opensource.org/licenses/osl.php or |
| by writing the Open Source Initiative c/o Lawrence Rosen, Esq., |
| 3001 King Ranch Road, Ukiah, CA 95482. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include "libdwarfP.h" |
| |
| |
| int |
| dwarf_get_loclist_entry (dbg, offset, hipc_offset, lopc_offset, data, |
| entry_len, next_entry, error) |
| Dwarf_Debug dbg; |
| Dwarf_Unsigned offset; |
| Dwarf_Addr *hipc_offset; |
| Dwarf_Addr *lopc_offset; |
| Dwarf_Ptr *data; |
| Dwarf_Unsigned *entry_len; |
| Dwarf_Unsigned *next_entry; |
| Dwarf_Error *error; |
| { |
| Dwarf_Small *locp; |
| |
| /* Make sure we have room for at least two addresses. */ |
| if (unlikely (offset + 2 * dbg->cu_list->address_size |
| > dbg->sections[IDX_debug_loc].size)) |
| { |
| __libdwarf_error (dbg, error, DW_E_INVALID_DWARF); |
| return DW_DLV_ERROR; |
| } |
| |
| locp = (Dwarf_Small *) dbg->sections[IDX_debug_loc].addr + offset; |
| |
| /* Get the two values. */ |
| if (dbg->cu_list->address_size == 4) |
| { |
| *lopc_offset = read_4ubyte_unaligned (dbg, locp); |
| *hipc_offset = read_4ubyte_unaligned (dbg, locp + 4); |
| locp += 8; |
| offset += 8; |
| } |
| else |
| { |
| *lopc_offset = read_8ubyte_unaligned (dbg, locp); |
| *hipc_offset = read_8ubyte_unaligned (dbg, locp + 8); |
| locp += 16; |
| offset += 16; |
| } |
| |
| /* Does this signal the end? */ |
| if (*lopc_offset == 0 && *hipc_offset == 0) |
| return DW_DLV_OK; |
| |
| /* Make sure another 2 bytes are available for the length. */ |
| if (unlikely (offset + 2 > dbg->sections[IDX_debug_loc].size)) |
| { |
| __libdwarf_error (dbg, error, DW_E_INVALID_DWARF); |
| return DW_DLV_ERROR; |
| } |
| *entry_len = read_2ubyte_unaligned (dbg, locp); |
| locp += 2; |
| offset += 2; |
| *data = locp; |
| |
| /* Now we know how long the block is. Test whether that much |
| data is available. */ |
| if (unlikely (offset + *entry_len > dbg->sections[IDX_debug_loc].size)) |
| { |
| __libdwarf_error (dbg, error, DW_E_INVALID_DWARF); |
| return DW_DLV_ERROR; |
| } |
| |
| *next_entry = offset + *entry_len; |
| |
| return DW_DLV_OK; |
| } |