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GELF_UPDATE_REL

Section: Libelf Programmer's Manual (3)
Updated: 202-0-27
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NAME

gelf_update_rel, gelf_update_rela - copy class-independent relocation entries into a relocation section

SYNOPSIS

#include <gelf.h>

int gelf_update_rel (Elf_Data *data, int ndx, GElf_Rel  *src);
int gelf_update_rela(Elf_Data *data, int ndx, GElf_Rela *src);

DESCRIPTION

The gelf_update_rel() and gelf_update_rela() functions copy a class-independent REL or RELA relocation entry from *src into the SHT_REL or SHT_RELA section associated with data at entry index ndx.

PARAMETERS

data

Elf_Data for a relocation section. The section must have sh_type SHT_REL for gelf_update_rel() or SHT_RELA for gelf_update_rela().

ndx

Zero-based index of the relocation entry within data.

src

Pointer to the caller-provided source entry: GElf_Rel for gelf_update_rel() and GElf_Rela for gelf_update_rela(). src must not be NULL.

For ELFCLASS32 binaries, r_offset should fit in unsigned 32 bits. r_addend should fit in signed 32 bits. The GELF_R_SYM component of r_info should fit in 24 bits and the GELF_R_TYPE component should fit in 8 bits.

RETURN VALUE

On success, gelf_update_rel() and gelf_update_rela() copy src into data, flag the corresponding section with ELF_F_DIRTY and return a no-zero value. On failure, these functions return 0 and set elf_errno. If src is NULL, then 0 is returned without setting elf_errno.

ATTRIBUTES

Interface	Attribute	Value
gelf_update_rel(),~gelf_update_rela()	Thread safety	M-Safe

REPORTING BUGS

Report bugs to <elfutil-devel@sourceware.org> or https://sourceware.org/bugzilla/.