Questions tagged [objcopy]
142 questions
2
votes
1 answer
powerpc-eabi-objcopy creates 1GByte file
my elf-file is about 1MByte with all debug symbols. As I try to create a binary file with "powerpc-eabi-objcopy -O binary out.elf out.bin" the out.bin is 1GByte huge.
The build script looks like…
Friedrich
- 645
- 11
- 26
2
votes
1 answer
Does breakpad's dump_syms tool handle gnu_debuglink sections?
I'm having a hard time generating breakpad symbols on Linux from stripped binaries.
I compile with:
gcc-4.4 -c -I../include -D_LINUX -m64 -fPIC -D__LP64__ -D_GNU_SOURCE -Wno-switch -Wno-missing-braces -fno-strict-aliasing -Wreturn-type -Wall…
Artfunkel
- 1,832
- 17
- 23
2
votes
3 answers
Objcopy --writable-text not making elf binary text section writable?
I was trying to make the .text section of an elf binary writable using objcopy --writable-text executable_name. The command executes normally without any errors.
On checking the section permission through readelf I can see that the text section is…
abhi
- 3,476
- 5
- 41
- 58
1
vote
0 answers
Is it legal to use --rename-section and --add-symbol with objdump at the same time?
I am using following command:
echo 'SOME_DATA' > data.file \
&& objcopy \
--input-target binary \
--output-target=elf64-x86-64 \
--rename-section .data=.my_data_section \
--add-symbol DATA_SECTION_START=.my_data_section:0 \
…
lol lol
- 319
- 3
- 18
1
vote
1 answer
--localize-symbol does not work on windows with mingw-w64
I have two files
foo_var.c
int global_var = 1;
foo_print.c
#include
extern int global_var;
void print_foo(void)
{
printf("print_foo = %d\n", global_var);
}
that compile and link into foo.o and localize global_var
gcc -c foo.c…
Liarsenic
- 36
- 6
1
vote
1 answer
How to specify architecture for sde-objcopy?
I need to convert an picture to an object file(.o) use sde-objcopy, then I can use this picture in our no-os system.
I had test the objcopy command, it works well on my PC(Fedora 12). For example, the command below will convert test.jpg to…
Serval
- 153
- 1
- 8
1
vote
0 answers
objcopy breaks shared library alignment on libgfortran-2e0d59d6.so.5.0.0
I'm trying to add a new section to the dynamic library(libgfortran-2e0d59d6.so.5.0.0) using an objcopy tool, but looks like it breaks file alignment, which is checked by python during a library load.
Probably it is true for many other libraries, but…
Narek Jaghinyan
- 11
- 4
1
vote
1 answer
Elegant way to get text section (.cmdline) from efi stub
I want to read the .cmdline section of a systemd efi stub (where initramfs, kernel and cmdline was inserted).
$ cp linux.efi x.efi
$ objcopy --dump-section .cmdline=/dev/stdout x.efi
root=UUID=a6a7b817-0979-46f2-a6f7-dfa191f9fea4 rw
$ cmp linux.efi…
Alai
- 123
- 1
- 8
1
vote
1 answer
ELF-Editing: Replacing function in it's own section with different function
I have a .o object file which has a function that other functions in that same file are calling. That function is in it's own section and not exported. I need to replace this function with my own implementation. My own implementation needs external…
J. Doe
- 53
- 4
1
vote
2 answers
How can I hook a static function?
I'm trying to mock a static function without modifying the source code. This is because we have a large legacy base of code and we would like to add test code without requiring developers to go through and change a bunch of the original code.
Using…
Maxthecat
- 1,250
- 17
- 37
1
vote
2 answers
Redefining symbols from shared library
I have a requirement on changing certain symbols from shared library (.so) files like below example:
i need to rename symbol abc in .so file to symbol xyz. I have a tool to replace it in header files, only challenge i am facing for changing in my…
praveen
- 21
- 3
1
vote
0 answers
redefine symbols for arm64 macOS
I have two static third-party libraries which have same exported symbol, and all of symbols I what to use in my shared library.
objcopy can redefine symbols from library. After install binutils package from brew, extract all *.o files from static…
Fesss
- 25
- 5
1
vote
0 answers
Relocate files in .debug_line section
Is it possible to change the file paths in a .debug_line section in an ELF file?
I'm trying to set up Debug Fission, so far I have my_library.so (in release mode, with no debug info) and my_library.so.dbg (with debug symbols). I've linked the two…
dogman288
- 613
- 3
- 9
1
vote
1 answer
Converting an ELF binary into an .o file
The question is as stated in the title: Is it possible to convert an ELF binary file hello_world into an object file hello_world.o, which can be used to generate a new binary hello_world_2 which is a replica of hello_world?
So from my searching, it…
Jay
- 373
- 1
- 10
1
vote
1 answer
How to call a renamed symbol in an external object file?
I am trying to fuzz a particular piece of code using LLVM libFuzzer that only exposes its main() function externally. I have access to the source of the target code, but cannot change it.
If I try to directly include the object file, it conflicts…
matoro
- 181
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