GELF_UPDATE_REL(3) Libelf Programmer's Manual GELF_UPDATE_REL(3) NAME gelf_update_rel, gelf_update_rela - copy class-independent relocation en- tries into a relocation section SYNOPSIS #include 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-inde- pendent 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_up- date_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 non-zero value. On failure, these functions return 0 and set elf_errno. If src is NULL, then 0 is returned without setting elf_errno. SEE ALSO gelf_getrel(3), gelf_getrela(3), libelf(3), elf(5) ATTRIBUTES allbox; lbx lb lb l l l. Interface Attribute Value T{ gelf_update_rel(), gelf_update_rela() T} Thread safety MT-Safe REPORTING BUGS Report bugs to or https://source- ware.org/bugzilla/. Libelf 2025-09-27 GELF_UPDATE_REL(3)