1.. SPDX-License-Identifier: GPL-2.0 2 3================================= 4Linux-specific ELF idiosyncrasies 5================================= 6 7Definitions 8=========== 9 10"First" program header is the one with the smallest offset in the file: 11e_phoff. 12 13"Last" program header is the one with the biggest offset in the file: 14e_phoff + (e_phnum - 1) * sizeof(Elf_Phdr). 15 16PT_INTERP 17========= 18 19First PT_INTERP program header is used to locate the filename of ELF 20interpreter. Other PT_INTERP headers are ignored (since Linux 2.4.11). 21 22PT_GNU_STACK 23============ 24 25Last PT_GNU_STACK program header defines userspace stack executability 26(since Linux 2.6.6). Other PT_GNU_STACK headers are ignored. 27 28PT_GNU_PROPERTY 29=============== 30 31ELF interpreter's last PT_GNU_PROPERTY program header is used (since 32Linux 5.8). If interpreter doesn't have one, then the last PT_GNU_PROPERTY 33program header of an executable is used. Other PT_GNU_PROPERTY headers 34are ignored. 35