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195 Commits

Author SHA1 Message Date
Serge Lamikhov-Center
9c739b49a0 Reformat sources by using clang-format 
It is not perfect (and, probably, it is worser than it was before), but, it is automatic
 2020-08-21 07:56:08 -07:00
Serge Lamikhov-Center
46acd5c16d Pass all used vars by reference 2020-08-21 00:55:28 -07:00
Serge Lamikhov-Center
aa4d2c5a74 Substitute memcpy() by std::copy() 2020-08-20 02:13:04 -07:00
Serge Lamikhov-Center
fe17eb40aa Implement swap_symbols() for relocation section. 
The function can be used as a callback for arrange_local_symbols()
 2020-08-19 22:44:58 -07:00
Serge Lamikhov-Center
d255a35259 Address warnings reported by VS 2020-08-19 23:58:07 +03:00
Serge Lamikhov-Center
c6e5eb0aad Update Copyright period 2020-08-19 13:47:20 -07:00
Serge Lamikhov-Center
6d3d5467a2 Permit substitution of relocation entry by using set_entry() function call 2020-08-19 13:39:15 -07:00
Serge Lamikhov-Center
5a5ba2dc09 Add a callback to arrange_local_symbols() 2020-08-19 07:28:47 -07:00
Serge Lamikhov-Center
8e0b5754e4 arrange_local_symbols() added 
ELF standard requires that all STB_LOCAL symbols will go prior others and sh_info entry will contain the number of the local symbols
 2020-08-18 12:57:45 -07:00
Serge Lamikhov-Center
d2c3fb6a14 Refactoring - remove unnecessary check 2020-08-15 18:56:13 +03:00
Serge Lamikhov-Center
8d79cc0929 Add function source delimiters 2020-08-15 18:33:50 +03:00
Serge Lamikhov-Center
a59cbf6674 Alighn code with whitespaces 2020-08-08 09:55:42 -07:00
Serge Lamikhov-Center
5f904722f6 New machine numbers added 2020-08-08 08:23:25 -07:00
Serge Lamikhov-Center
b1961db18b Fix compilation warnings in VS 2019 v16.7.0 2020-08-07 20:27:13 +03:00
Serge Lamikhov-Center
a735f412ec Remove unused header 2020-06-10 08:01:20 -07:00
Serge Lamikhov-Center
9cf8821c03 Prevents seg fault described in #42 2020-06-10 06:53:29 -07:00
Serge Lamikhov-Center
b56b93de1b Remove implementation functions from section interface 2020-06-09 23:46:41 -07:00
Pierre Bélissent
6e237576f0 Issue serge1/ELFIO#19: Test case to reproduce, and correction 2020-06-06 22:26:12 +03:00
Serge Lamikhov-Center
453929342f Don't access a note entry in case namesz is less than 1 2020-05-29 05:26:43 -07:00
Serge Lamikhov-Center
a935b5472e The counter type for 'symbol_tables' has been changed to Elf_Xword 2020-05-29 13:54:28 +03:00
Serge Lamikhov-Center
64626605ed Remove tab characters 2020-02-22 18:22:23 +02:00
Serge Lamikhov-Center
3e4a2fabfd Add tests for the new flavor of get_symbol() 2020-02-22 11:31:27 +02:00
Serge Lamikhov-Center
46d081d5df Add autoxxx tools to the ELFIOTest directory 2020-02-15 23:24:20 +02:00
Alfred Bratterud
d8e8a4cbb4 Added get_symbol by value and generic linear search 2020-02-15 23:10:01 +02:00
Serge Lamikhov-Center
15cd4b1bf2 Remove tabs 2019-04-28 09:00:14 +03:00
Gleb Struchalin
15340ddf9c Avoid warning about initialization reorder (-Wreorder) on GCC 2019-04-28 08:57:04 +03:00
Serge Lamikhov-Center
cdafaa0abf Prevent potential dereferencing of NULL pointer 2019-04-19 15:05:50 +03:00
Serge Lamikhov-Center
858b7a3b70 Names and tabs refactoring 2019-04-19 14:52:20 +03:00
Gleb Struchalin
a314b28193 Replaced tabs by spaces 2019-04-19 13:55:00 +03:00
Gleb Struchalin
925af0d3d5 Added overload to elfio::save which accepts std::ostream 2019-04-19 13:55:00 +03:00
Gleb Struchalin
e64acb2b2e Added parentheses in ELF64_R_INFO macro for 's' parameter 2019-04-19 13:55:00 +03:00
Vinicius Rangel
350008420f dynamic_section_accessor#add_entry params updated 
Changed useless by-reference params to by-value
which forbids number literals (i.e. DT_*)

Added missing const keyword to std::string& parameter
 2019-04-19 09:24:40 +03:00
Serge Lamikhov-Center
cb3bd43ca5 Avoid warning regarding incompatible integer types 2018-11-03 18:11:32 +02:00
Alex Voicu
9f1e1ae164 Fix alignment. 2018-11-02 23:16:14 +02:00
Alex Voicu
144946f753 Add support for AMDGPU specific ELF bits. 2018-11-02 23:16:14 +02:00
Serge Lamikhov-Center
9461ce1167 Fix "Call to virtual function during construction". Thanks to Pavel Kryukov 2018-11-02 23:05:26 +02:00
Pavel I. Kryukov
e4abc190d6 Cast -1 to Elf_Half explicitly to suppress Visual Studio warning 2018-08-25 22:41:06 +03:00
Pavel I. Kryukov
6a2e8c78b0 Avoid hiding local variable by another local variable in elfio::load_sections 2018-08-25 22:40:00 +03:00
Jingxuan He
4b9ff89770 modify get_ordered_segments 2018-05-05 19:32:49 +03:00
Tobias Klauser
37ebcd91b8 Fix two gcc -Wignored-qualifiers warnings 
Fix the following two gcc warnings:

elfio/elfio_section.hpp:50:36: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     const size_t get_stream_size() const
                                    ^
elfio/elfio_segment.hpp:99:23: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
     get_stream_size() const
 2018-05-05 19:30:09 +03:00
alvaro
bc5f17b0fc Fix more NULL dereferences 
Crash 7d695153fd8052529d480c2352d4ada33a44bada
 2017-10-04 20:47:51 +03:00
alvaro
abab994411 Fix NULL deference for no ELF files 
Fix crash 060833f08dc14d1712428742b3cad7af17b36bb7
 2017-10-04 20:47:51 +03:00
alvaro
bd5f2128ae Check size for segment 
Fix crash b82f05b0b25c8fdc98480e6d76b6d5f9164ae2bc

Running: crash-b82f05b0b25c8fdc98480e6d76b6d5f9164ae2bc
==2850==WARNING: AddressSanitizer failed to allocate 0x400000004000001 bytes
==2850==AddressSanitizer's allocator is terminating the process instead of returning 0
==2850==If you don't like this behavior set allocator_may_return_null=1
==2850==AddressSanitizer CHECK failed: /home/alvaro/tools/llvm/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_allocator.cc:22
1 "((0)) != (0)" (0x0, 0x0)
 2017-10-04 20:47:51 +03:00
alvaro
1a3cb25a7c Fix oob read terminating data with 0 
Fix crash e3c41070342cf84dea077356ddbb8ebf4326a601

==12073==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6110000003bb at pc 0x0000004c234c bp 0x7fcf6359ec30 sp 0x7fcf6359e3
e0
READ of size 11 at 0x6110000003bb thread T0
    #0 0x4c234b in __interceptor_strlen.part.30 /home/alvaro/tools/llvm/llvm/projects/compiler-rt/lib/asan/../sanitizer_common/sanitize
r_common_interceptors.inc:301
    #1 0x7165e6579d87 in std::char_traits<char>::length(char const*) /build/gcc-multilib/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3
/include/bits/char_traits.h:269
    #2 0x7165e6579d87 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std
::allocator<char> const&) /build/gcc-multilib/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:495
    #3 0x5c3333 in ELFIO::elfio::load_sections(std::istream&) /home/alvaro/fuzzers/elfio/ELFIO/examples/libfuzzer/../../elfio/elfio.hpp
:413:44
 2017-10-04 20:47:51 +03:00
alvaro
39f8614f17 Added stream_size into section 
This will allow to perform some security checks when reading size values
from ELF file

Fix crash e1ce7cecf01cf800397a4302854d9d76fa19763c
 2017-10-04 20:47:51 +03:00
Vašek Potoček
972f89e022 Better support for read-only ELF access 2017-10-04 20:33:10 +03:00
Vašek Potoček
ced83b14be More 386 relocation types 2017-10-04 20:15:53 +03:00
Serge Lamikhov-Center
fbf8eafc2d Permit updating of e_version field of ELF header 2017-03-28 00:35:17 +03:00
Martin Bickel
b4127676ba Fix calculation of section alignment 2017-03-06 22:28:46 +02:00
Martin Bickel
3385408d6b Rephrase condition of is_sect_in_seg() to make it more intuitive 2017-03-06 22:28:46 +02:00
Martin Bickel
fe78d06e81 Segment align updated when saving, not loading 
After loading, the data model in memory should resemble the original ELF file as closely as possible,
so that ELF viewers based on elfio will print out the original values, not the calculated ones.
 2017-02-18 19:25:21 +02:00
Martin Bickel
6c19078803 Fixed section to segment mapping for 0-length sections 2017-02-18 19:25:21 +02:00
Martin Bickel
d800c7b295 When saving a previously loaded ELF file, don't shrink segments' memory size 2017-01-16 20:38:37 +02:00
Martin Bickel
213dbedac2 Add sanity check when calculating alignment 2017-01-16 20:38:37 +02:00
Martin Bickel
fb5ec079ba new method for validating the loaded ELF file 2017-01-16 20:38:37 +02:00
Martin Bickel
d0cb172474 Expose getter for section.offset 2017-01-16 20:38:37 +02:00
Martin Bickel
a0de1960d6 Check for errors when loading segments 2017-01-16 20:38:37 +02:00
Serge Lamikhov-Center
878247108f Ignore sections of zero size. Thanks to Martin Bickel 2016-12-20 20:11:20 +02:00
Tobias Klauser
446e0c215c elfio_note: fix MSVC compiler warning 
Fix the following MSVC compiler warning:

elfio/elfio_note.hpp(77): warning C4267: 'initializing' : conversion from 'size_t' to 'ELFIO::Elf_Word', possible loss of data

by changing the type of max_name_sizei to Elf_Xword, as
note_secton->get_size() returns Elf_Xword and note_start_positions also
contains members of type Elf_Xword.
 2016-10-06 12:07:20 +02:00
Tobias Klauser
af4140a122 elfio: don't cast away const qualifiers 
Don't cast away const qualifiers when accessing const data (e.g. section
data). This fixes the warnings such as the following when compiling with
GCC and the -Wcast-qual flag set:

warning: cast from type ‘const char*’ to type ‘ELFIO::Elf_Word* {aka unsigned int*}’ casts away qualifiers [-Wcast-qual]
 2016-09-22 23:22:39 +03:00
Yutetsu TAKATSUKASA
fb26cf1002 resolve compiler warning by "-Wsign-compare" 2016-09-18 10:44:16 +09:00
Serge Lamikhov-Center
b2525656a5 New e_machine numbers added 2016-07-10 12:36:52 +03:00
Serge Lamikhov-Center
3c5620d46d Make note section entries for 64-bit ELF file be the same as for 32-bit file 
There are discrepancies in documentations. SCO documentation
(http://www.sco.com/developers/gabi/latest/ch5.pheader.html#note_section)
requires 8 byte entries alignment for 64-bit ELF file,
but Oracle's definition uses the same structure
for 32-bit and 64-bit formats.
(https://docs.oracle.com/cd/E23824_01/html/819-0690/chapter6-18048.html)

It looks like EM_X86_64 Linux implementation is similar to Oracle's
definition. Therefore, the same alignment works for both formats
 2016-07-10 11:35:23 +03:00
Kevin Klues
e3e0d6dbdb Fixed off-by-one error in 'name' of add_note() function. 
Previously, when assigning 'name' as a string, it's length was specified
using the full length of 'namesz'. However, this length includes the
trailing '\0' of the underlying char[]. This ultimately causes the C++
string that is created to (incorrectly) contain the '\0' character as
well. This leads to problems where e.g. the following will return false,
even when 'name' itself actually contains the string "GNU\0":

  if (name == "GNU") {
    return true;
  }
  return false;

To fix this, we should only include the length of the string minus the
trailing '\0'.
 2016-07-02 11:02:20 -07:00
Serge Lamikhov-Center
8e7a29e128 Refactoring 2016-04-23 17:58:34 +03:00
Tim Strazzere
ecc45ede27 Prevent accessing pdata struct if it doesn't exist. 2016-04-23 16:37:48 +03:00
Tim Strazzere
88503347da Avoid SIGSEV due to non-existant string section. 2016-04-23 16:37:48 +03:00
Tim Strazzere
812f7299b3 Avoid SIGABRT due to over allocating during new instance of objects. 2016-04-23 16:37:48 +03:00
Serge Lamikhov-Center
69b6177bd6 Make '.shstrtab' section be explicitly aligned to 1 2015-09-26 15:01:56 +03:00
Serge Lamikhov-Center
f2e17bac87 Fix offset calculation for the case where section's align field is zero 2015-09-26 11:07:26 +03:00
Serge Lamikhov-Center
3429026ab7 Include <iterator> header file 2015-08-22 20:04:02 +03:00
Serge Lamikhov-Center
b88df7bda8 The list of machine architectures was updated 2015-04-30 18:16:03 +03:00
Serge Lamikhov-Center
5ec1fc8949 Prevent a crash when working with MN10300 ELF file 2015-02-25 00:57:51 +02:00
Serge Lamikhov-Center
c45e81fd32 String section accessor refactoring 2015-02-21 13:50:32 +02:00
Serge Lamikhov-Center
9e4502d90e Copyright year update 2015-02-13 20:51:07 +02:00
Serge Lamikhov-Center
8290078a64 Relocation entry endianness fix; Warnings elimination 2015-02-13 20:47:37 +02:00
Mario Werner
91e61ec4b2 use the NULL section instead of offset == 0 
This change makes it possible to use the regular API to build up
elf files which include the file header.
 2014-12-03 10:38:44 +01:00
Mario Werner
d2a27c7d96 initialized a few variables to silence warnings when building with Wall 2014-12-03 09:45:21 +01:00
Mario Werner
1676247836 fix alignment of segments during saving -> copied elfs are working 
The old implementation aligned the segment start. However, the
intended behaviour is to align the offset and the vaddr
(p_vaddr % p_align == p_offset % p_align). This is required for the
loader which can then operate on memory pages.
 2014-12-03 09:27:56 +01:00
Mario Werner
fe0c85995d add 4 byte alignment for the section table 
this is probably not required but definitely does not hurt
 2014-12-03 09:24:21 +01:00
Serge Lamikhov-Center
1db119a8ca Refactoring - a nicer code for is_subsequence_of() 
Conflicts:
	elf_examples/asm_copy
 2014-11-23 00:53:19 +02:00
Mario Werner
b91a43b378 special support for PHDR segments and segments which include the elf header 
Only elf files with strange GNU_RELRO segments fail the load, save, cycle.

It would maybe a good idea to separate the layout functionality from the
current save. The current coupling of layout and save make it
impossible to build layouts which contain the elf header via the public
API.
 2014-11-15 22:08:52 +01:00
Mario Werner
755b92c580 move the section table to the end of the elf file 2014-11-14 13:40:25 +01:00
Mario Werner
c743d0bf74 separated layout generation and saving 
Many example elfs (hello_32, hello_64, asm ...) require that the
first section directly follows the program header table. The
section header is then placed between segments or at the end.

This change prepares the late placement of section header table.
 2014-11-14 13:06:39 +01:00
Mario Werner
55c2841e47 changed order in which the sections are emitted 
The fact that segments can contain header information as well as
sections requires that sections within segments are emitted first.
 2014-11-14 10:37:50 +01:00
Mario Werner
0ece76b5eb rewrote the segment save logic to not only care about alignment 
The initial implementation only made sure that all sections and segments
are properly aligned. This is enough for simple embedded applications
but can not deal with more complex layouts.

The new implementation should be more generic given that it respects the
virtual addresses of the individual sections.

One thing which is currently not supported by this rewrite are segments
which contain the program/segment header or even the whole elf header.
 2014-11-14 08:27:36 +01:00
Mario Werner
e5592ddfdd fix: make segment loading similar to readelf's algorithm 
ALLOC sections are now matched against the virtual address space of
the segment. Non ALLOC sections still use the offset approach.
 2014-11-14 08:04:55 +01:00
Mario Werner
8dda93f2bb fixed a few warnings (signed-unsigned comparisions, unused param) 2014-11-13 18:24:03 +01:00
Mario Werner
22bd7ba77d fix: static class member MAX_DATA_ENTRIES is not defined -> linker error 
Static class members usually have to be defined explicitly which plays not
well with header only libraries. Moving the constant into the ELFIO scope
works around that problem.

The problem only shows up at -O0. Higher optimisations levels manage to
completely remove the references to the static member.
 2014-11-13 18:23:02 +01:00
Semi Malinen
5000c533ba Add const 2014-10-30 14:47:14 +02:00
Semi Malinen
695a05dc5d Do not index past the end of the chain table 2014-10-30 14:29:33 +02:00
Serge Lamikhov-Center
7dd7dade6f Non-significant formatting 2014-08-09 10:56:18 +03:00
Vincent Huang
6d713f4d0a Added iterator for segments and sections 
segments and sections were already stored as std::vector<T>.
This change simply exposes the std::vector<T>::iterator functions.
 2014-08-07 23:12:35 -04:00
Serge Lamikhov-Center
33dcaf063f Use [i|o]stream instead of [i|o]fstream; The patch was provided by Jason Hiser 
Test's fixes
 2014-02-26 18:02:30 +02:00
Serge Lamikhov-Center
e8afffece9 Dump for section and segment data added 2014-02-26 17:35:20 +02:00
Serge Lamikhov-Center
17f03740e6 Using macros for header fields access functions 
Set segment's index upon its creation
Move to VS2013 projects
 2014-02-26 17:30:43 +02:00
Mario Werner
1d2930abc7 redesigned save_segments_and_their_sections 
We have some elf files where a section (.ARM.exidx) is located in multiple segments.
To keep this property it is necessary to keep track of the emitted sections.
Furthermore, the correct sequence for the segment emission has to be determined.
This is done by postponing segments which are actually a subsequence of another segment.

Additionally the alignment is not considered as part of the file size of a segment anymore.
 2014-02-17 11:52:25 +01:00
Mario Werner
5dd8ba29bd assign sections to the segments during load based on the offsets 2014-02-13 18:59:16 +01:00
Mario Werner
f78a519522 removed const from the segment load function 2014-02-13 18:45:17 +01:00
Serge Lamikhov-Center
ed600e64f3 Ticket #10: Fix section type SHT_NOBITS file_size calculation 2013-05-16 17:58:09 +03:00