1 /* elf-fdpic.h: FDPIC ELF load map 2 * 3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells (at) redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #ifndef _LINUX_ELF_FDPIC_H 13 #define _LINUX_ELF_FDPIC_H 14 15 #include <linux/elf.h> 16 17 #define PT_GNU_STACK (PT_LOOS + 0x474e551) 18 19 /* segment mappings for ELF FDPIC libraries/executables/interpreters */ 20 struct elf32_fdpic_loadseg { 21 Elf32_Addr addr; /* core address to which mapped */ 22 Elf32_Addr p_vaddr; /* VMA recorded in file */ 23 Elf32_Word p_memsz; /* allocation size recorded in file */ 24 }; 25 26 struct elf32_fdpic_loadmap { 27 Elf32_Half version; /* version of these structures, just in case... */ 28 Elf32_Half nsegs; /* number of segments */ 29 struct elf32_fdpic_loadseg segs[]; 30 }; 31 32 #define ELF32_FDPIC_LOADMAP_VERSION 0x0000 33 34 /* 35 * binfmt binary parameters structure 36 */ 37 struct elf_fdpic_params { 38 struct elfhdr hdr; /* ref copy of ELF header */ 39 struct elf_phdr *phdrs; /* ref copy of PT_PHDR table */ 40 struct elf32_fdpic_loadmap *loadmap; /* loadmap to be passed to userspace */ 41 unsigned long elfhdr_addr; /* mapped ELF header user address */ 42 unsigned long ph_addr; /* mapped PT_PHDR user address */ 43 unsigned long map_addr; /* mapped loadmap user address */ 44 unsigned long entry_addr; /* mapped entry user address */ 45 unsigned long stack_size; /* stack size requested (PT_GNU_STACK) */ 46 unsigned long dynamic_addr; /* mapped PT_DYNAMIC user address */ 47 unsigned long load_addr; /* user address at which to map binary */ 48 unsigned long flags; 49 #define ELF_FDPIC_FLAG_ARRANGEMENT 0x0000000f /* PT_LOAD arrangement flags */ 50 #define ELF_FDPIC_FLAG_INDEPENDENT 0x00000000 /* PT_LOADs can be put anywhere */ 51 #define ELF_FDPIC_FLAG_HONOURVADDR 0x00000001 /* PT_LOAD.vaddr must be honoured */ 52 #define ELF_FDPIC_FLAG_CONSTDISP 0x00000002 /* PT_LOADs require constant 53 * displacement */ 54 #define ELF_FDPIC_FLAG_CONTIGUOUS 0x00000003 /* PT_LOADs should be contiguous */ 55 #define ELF_FDPIC_FLAG_EXEC_STACK 0x00000010 /* T if stack to be executable */ 56 #define ELF_FDPIC_FLAG_NOEXEC_STACK 0x00000020 /* T if stack not to be executable */ 57 #define ELF_FDPIC_FLAG_EXECUTABLE 0x00000040 /* T if this object is the executable */ 58 #define ELF_FDPIC_FLAG_PRESENT 0x80000000 /* T if this object is present */ 59 }; 60 61 #ifdef CONFIG_MMU 62 extern void elf_fdpic_arch_lay_out_mm(struct elf_fdpic_params *exec_params, 63 struct elf_fdpic_params *interp_params, 64 unsigned long *start_stack, 65 unsigned long *start_brk); 66 #endif 67 68 #endif /* _LINUX_ELF_FDPIC_H */ 69
