objcopy

Make Executable Binary File From Elf Using GNU objcopy

由 别说谁变了你拦得住时间么 提交于 2021-02-17 20:57:08
问题 I'd like to copy an executable ELF file via: $ objcopy -O binary myfile.elf myfile.bin Unfortunately: $ chmod +x myfile.bin $ ./myfile.bin results in: cannot execute binary file Is there any way to retain the files executability? 回答1: To be executable by the execve(2) syscall, a file usually has to be some elf(5) file (or some script, or some old a.out format). But see also binfmt_misc Your objcopy(1) command is loosing the essential meta-data in the ELF file. Maybe you want strip(1) Recall

Separating out symbols and stripping unneeded symbols at the same time

由 ￡可爱￡侵袭症＋ 提交于 2020-01-13 13:08:09
问题 I am interested in creating an external symbol file which I reference from my ELF file using objcopy --add-gnu-debuglink=... . Now I know how to extract only the debug symbols ( objcopy --only-keep-debug ) and how to only strip the debug symbols ( objcopy --strip-debug ). However, I'd like to strip all unneeded symbols . I know this can be done via objcopy --strip-unneeded . The fact that debug and unneeded symbols are two different categories and two different command line switches suggests

How to create a executable hex from elf file format

由 人走茶凉 提交于 2020-01-04 03:14:09
问题 I am very very new to this, I have elf file input.out and need to create hex executable from it. I am using objcopy to create executable in intel hex format as follows objcopy -O ihex input.out out.hex by this out.hex contains data from all sections (.interp, .note.ABI-tag etc), but i am not sure if all of it is required for executable. Is just .text section enough for creating executable hex so can i just use as below or any more sections are required objcopy -j.text -O ihex input.out out

GCC: how to tell GCC to put the 'main' function at the start of the .text section?

由 二次信任 提交于 2019-12-18 04:17:13
问题 I've just started learning some ARM programming and I've got stuck in a slightly annoying problem. The toolchain I'm using to compile my sources is Sourcery CodeBench Lite 2013.05-23 (can be found here: https://sourcery.mentor.com/GNUToolchain/release2449) What I would need is to tell GCC or LD or OBJCOPY to put the compiled bytecode of the 'main' function at the beginning of the .text section. Is there any way to achieve this? (maybe through a linker script?) Thank you 回答1: Solved the

How do I embed the contents of a binary file in an executable on Mac OS X?

由 回眸只為那壹抹淺笑 提交于 2019-12-09 13:07:29
问题 My command-line program's build process generates a binary file (over 500KB) that currently has to be referenced by path from argv. I would like to embed this file in the executable instead. On Linux, it appears possible to use objcopy to make an object file from a binary file: objcopy --input binary --output elf32-i386 --binary-architecture i386 myfile.dat myfile.o However, the OS X developer toolchain doesn't include an objcopy command. Short of installing binutils, what are the

Linker Script Does Not Skip Bytes As Expected

由 ↘锁芯ラ 提交于 2019-12-07 19:01:47
问题 So, I have this assembly file, which I assemble with GNU as and link with GNU ld using a linker script. Linker script ( boot.ld ): INPUT(boot.o) OUTPUT(boot.out) ENTRY(boot_start) SECTIONS { . = 0x7c00; .text : { *(.text) } .data : { *(.data) } . = 0x7dfe; .boot_end : { *(.boot_end) } } As you see I try to make the file exactly 512 bytes as needed for a bootloader by doing . = 0x7cdfe . .boot_end contains the boot signature and thus fills up the remaining two bytes. I create the bootloader as

android NDK: objcopy --rename-sym does not work (need to rename a function in a .so file)

由 自古美人都是妖i 提交于 2019-12-06 12:41:28
问题 I cannot get objcopy --rename-sym working. In a new Android project, I have created the directory jni and the file stub.c: #include <jni.h> #include "dlog.h" jint JNI_OnLoad(JavaVM* vm, void* reserved) { DLOG("~~~~~~~~~~~~~~~~~~~~~~~ JNI_OnLoad ~~~~~~~~~~~~~~~~~~~~~~~~~"); return JNI_VERSION_1_6; } int myfunc() { return 0; } the command ~/an/ndk-build -j 4 says: [armeabi-v7a] Install : libTest.so => libs/armeabi-v7a/libTest.so [armeabi] Install : libTest.so => libs/armeabi/libTest.so [x86]

android NDK: objcopy --rename-sym does not work (need to rename a function in a .so file)

由 天大地大妈咪最大 提交于 2019-12-04 18:23:48
I cannot get objcopy --rename-sym working. In a new Android project, I have created the directory jni and the file stub.c: #include <jni.h> #include "dlog.h" jint JNI_OnLoad(JavaVM* vm, void* reserved) { DLOG("~~~~~~~~~~~~~~~~~~~~~~~ JNI_OnLoad ~~~~~~~~~~~~~~~~~~~~~~~~~"); return JNI_VERSION_1_6; } int myfunc() { return 0; } the command ~/an/ndk-build -j 4 says: [armeabi-v7a] Install : libTest.so => libs/armeabi-v7a/libTest.so [armeabi] Install : libTest.so => libs/armeabi/libTest.so [x86] Install : libTest.so => libs/x86/libTest.so [mips] Install : libTest.so => libs/mips/libTest.so (There

How do I embed the contents of a binary file in an executable on Mac OS X?

由 ▼魔方 西西 提交于 2019-12-03 16:09:04
My command-line program's build process generates a binary file (over 500KB) that currently has to be referenced by path from argv. I would like to embed this file in the executable instead. On Linux, it appears possible to use objcopy to make an object file from a binary file: objcopy --input binary --output elf32-i386 --binary-architecture i386 myfile.dat myfile.o However, the OS X developer toolchain doesn't include an objcopy command. Short of installing binutils, what are the possibilities? I build my project from Xcode and the file is generated with a custom build rule. During the link

Edit variable values in ELF file?

由 左心房为你撑大大i 提交于 2019-12-03 13:44:25
问题 I need to change a couple of variables in a compiled ELF file. Trying to explain this clearly I'll use a simple C struct as an example. The single source file is compiled and linked (@ 0x1000) into MyFile.elf from MyFile.c: typedef struct { uint32_t SerialNumber; /* Increments for every time it's programmed */ uint32_t PartNumber; /* Always the same */ char ProdDateTime[32]; /* "YYYY-MM-DD HH:MM:SS" date/time when programmed */ uint32_t CalcCrc32; /* Checksum of the above data */ } MyData_T;
订阅 objcopy