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#include <libelf.h>
#include <gelf.h>
Function elf32_newehdr() returns a pointer to a 32 bit Elf32_Ehdr structure. Function elf64_newehdr() returns a pointer to a 64 bit Elf64_Ehdr structure.
When argument elfclass has value ELFCLASS32, function gelf_newehdr() returns the value returned by elf32_newehdr(elf). When argument elfclass has value ELFCLASS64 it returns the value returned by elf64_newehdr(elf).
If a fresh header structure is allocated, the members of the structure are initialized as follows:
e_ident[EI_MAG0..EI_MAG3] | |
Identification bytes at offsets EI_MAG0, EI_MAG1, EI_MAG2 and EI_MAG3 are set to the ELF signature. | |
e_ident[EI_CLASS] | |
The identification byte at offset EI_CLASS is set to the ELF class associated with the function being called or to argument elfclass for function gelf_newehdr(). | |
e_ident[EI_DATA] | |
The identification byte at offset EI_DATA is set to ELFDATANONE. | |
e_ident[EI_VERSION] | |
The identification byte at offset EI_VERSION is set to the ELF library's operating version set by a prior call to elf_version(3). | |
e_machine | |
is set to EM_NONE. | |
e_type | |
is set to ELF_K_NONE. | |
e_version | |
is set to the ELF library's operating version set by a prior call to elf_version(3). | |
Other members of the header are set to zero. The application is responsible for changing these values as needed before calling elf_update().
If successful, these three functions set the ELF_F_DIRTY flag on ELF descriptor elf.
[ELF_E_ARGUMENT] | |
The argument elf was null. | |
[ELF_E_ARGUMENT] | |
Argument elf was not a descriptor for an ELF object. | |
[ELF_E_ARGUMENT] | |
Argument elfclass had an unsupported value. | |
[ELF_E_ARGUMENT] | |
The class of the ELF descriptor elf did not match that of the requested operation. | |
[ELF_E_ARGUMENT] | |
For function gelf_newehdr(), the class of argument elf was not ELFCLASSNONE and did not match the argument elfclass. | |
[ELF_E_CLASS] | The ELF class of descriptor elf did not match that of the API function being called. |
[ELF_E_HEADER] | A malformed ELF header was detected. |
[ELF_E_RESOURCE] | |
An out of memory condition was detected during execution. | |
[ELF_E_SECTION] | The ELF descriptor in argument elf did not adhere to the conventions used for extended numbering. |
[ELF_E_VERSION] | The ELF descriptor elf had an unsupported ELF version number. |
GELF_NEWEHDR (3) | June 12, 2019 |
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