| /* Return list address ranges. |
| Copyright (C) 2000, 2001, 2002 Red Hat, Inc. |
| Written by Ulrich Drepper <drepper@redhat.com>, 2000. |
| |
| 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 <stdlib.h> |
| |
| #include <libdwarfP.h> |
| |
| |
| struct arangelist |
| { |
| Dwarf_Arange arange; |
| struct arangelist *next; |
| }; |
| |
| |
| int |
| dwarf_get_aranges (dbg, aranges, return_count, error) |
| Dwarf_Debug dbg; |
| Dwarf_Arange **aranges; |
| Dwarf_Signed *return_count; |
| Dwarf_Error *error; |
| { |
| Dwarf_Small *readp; |
| Dwarf_Small *readendp; |
| struct arangelist *arangelist = NULL; |
| unsigned int narangelist = 0; |
| |
| if (dbg->sections[IDX_debug_aranges].addr == NULL) |
| return DW_DLV_NO_ENTRY; |
| |
| readp = (Dwarf_Small *) dbg->sections[IDX_debug_aranges].addr; |
| readendp = readp + dbg->sections[IDX_debug_aranges].size; |
| |
| while (readp < readendp) |
| { |
| Dwarf_Small *hdrstart = readp; |
| Dwarf_Unsigned length; |
| unsigned int length_bytes; |
| unsigned int version; |
| Dwarf_Unsigned offset; |
| unsigned int address_size; |
| unsigned int segment_size; |
| Dwarf_Arange_Info arange_info; |
| |
| /* Each entry starts with a header: |
| |
| 1. A 4-byte or 12-byte length containing the length of the |
| set of entries for this compilation unit, not including the |
| length field itself. [...] |
| |
| 2. A 2-byte version identifier containing the value 2 for |
| DWARF Version 2.1. |
| |
| 3. A 4-byte or 8-byte offset into the .debug_info section. [...] |
| |
| 4. A 1-byte unsigned integer containing the size in bytes of |
| an address (or the offset portion of an address for segmented |
| addressing) on the target system. |
| |
| 5. A 1-byte unsigned integer containing the size in bytes of |
| a segment descriptor on the target system. */ |
| length = read_4ubyte_unaligned (dbg, readp); |
| readp += 4; |
| length_bytes = 4; |
| if (length == 0xffffffff) |
| { |
| length = read_8ubyte_unaligned (dbg, readp); |
| readp += 8; |
| length_bytes = 8; |
| } |
| |
| version = read_2ubyte_unaligned (dbg, readp); |
| readp += 2; |
| if (version != 2) |
| { |
| __libdwarf_error (dbg, error, DW_E_INVALID_DWARF); |
| return DW_DLV_ERROR; |
| } |
| |
| if (length_bytes == 4) |
| offset = read_4ubyte_unaligned (dbg, readp); |
| else |
| offset = read_8ubyte_unaligned (dbg, readp); |
| readp += length_bytes; |
| |
| address_size = *readp++; |
| segment_size = *readp++; |
| |
| /* Round the address to the next multiple of 2*address_size. */ |
| readp += ((2 * address_size - ((readp - hdrstart) % (2 * address_size))) |
| % (2 * address_size)); |
| |
| arange_info = |
| (Dwarf_Arange_Info) malloc (sizeof (struct Dwarf_Arange_s)); |
| if (arange_info == NULL) |
| { |
| __libdwarf_error (dbg, error, DW_E_NOMEM); |
| return DW_DLV_ERROR; |
| } |
| |
| arange_info->dbg = dbg; |
| arange_info->offset = offset; |
| |
| while (1) |
| { |
| Dwarf_Unsigned range_address; |
| Dwarf_Unsigned range_length; |
| struct arangelist *new_arange; |
| |
| if (address_size == 4) |
| { |
| range_address = read_4ubyte_unaligned (dbg, readp); |
| readp += 4; |
| range_length = read_4ubyte_unaligned (dbg, readp); |
| readp += 4; |
| } |
| else if (likely (address_size == 8)) |
| { |
| range_address = read_8ubyte_unaligned (dbg, readp); |
| readp += 8; |
| range_length = read_8ubyte_unaligned (dbg, readp); |
| readp += 8; |
| } |
| else |
| abort (); |
| |
| /* Two zero values mark the end. */ |
| if (range_address == 0 && range_length == 0) |
| break; |
| |
| new_arange = |
| (struct arangelist *) alloca (sizeof (struct arangelist)); |
| new_arange->arange = |
| (Dwarf_Arange) malloc (sizeof (struct Dwarf_Arange_s)); |
| if (new_arange->arange == NULL) |
| { |
| __libdwarf_error (dbg, error, DW_E_NOMEM); |
| return DW_DLV_ERROR; |
| } |
| |
| new_arange->arange->address = range_address; |
| new_arange->arange->length = range_length; |
| new_arange->arange->info = arange_info; |
| |
| new_arange->next = arangelist; |
| arangelist = new_arange; |
| ++narangelist; |
| } |
| } |
| |
| if (narangelist == 0) |
| return DW_DLV_NO_ENTRY; |
| |
| /* Allocate the array for the result. */ |
| *return_count = narangelist; |
| *aranges = (Dwarf_Arange *) malloc (narangelist |
| * sizeof (struct Dwarf_Arange_s)); |
| if (*aranges == NULL) |
| { |
| __libdwarf_error (dbg, error, DW_E_NOMEM); |
| return DW_DLV_ERROR; |
| } |
| |
| while (narangelist-- > 0) |
| { |
| (*aranges)[narangelist] = arangelist->arange; |
| arangelist = arangelist->next; |
| } |
| |
| return DW_DLV_OK; |
| } |