diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h new file mode 100644 index 0000000..dca1fe0 --- /dev/null +++ b/arch/x86/include/asm/elf.h @@ -0,0 +1,179 @@ +/* + * Copyright (c) 2010, Stefan Lankes, RWTH Aachen University + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** + * @author Stefan Lankes + * @file arch/x86/include/asm/elf.h + * @brief Define constants and structures related to ELF + * + * This file keeps define constants for identification and definition of ELF files.\n + * ELF files consist of up to five parts: + * - ELF header + * - program header table + * - section header table + * - ELF sections + * - ELF segment + */ +#ifndef __ELF_H__ +#define __ELF_H__ + +#include +#include + +#ifdef __cplusplus +extern "C" { +#endif + +#define ELF_MAGIC 0x464C457F + +#define ELF_ET_NONE 0x0000 // no type +#define ELF_ET_REL 0x0001 // relocatable +#define ELF_ET_EXEC 0x0002 // executeable +#define ELF_ET_DYN 0x0003 // Shared-Object-File +#define ELF_ET_CORE 0x0004 // Corefile +#define ELF_ET_LOPROC 0xFF00 // Processor-specific +#define ELF_ET_HIPROC 0x00FF // Processor-specific + +#define ELF_EM_NONE 0x0000 // no type +#define ELF_EM_M32 0x0001 // AT&T WE 32100 +#define ELF_EM_SPARC 0x0002 // SPARC +#define ELF_EM_386 0x0003 // Intel 80386 +#define ELF_EM_68K 0x0004 // Motorola 68000 +#define ELF_EM_88K 0x0005 // Motorola 88000 +#define ELF_EM_860 0x0007 // Intel 80860 +#define ELF_EM_MIPS 0x0008 // MIPS RS3000 + +#define ELF_CLASS_NONE 0x0000 +#define ELF_CLASS_32 0x0001 // 32bit file +#define ELF_CLASS_64 0x0002 // 64bit file + +#define ELF_DATA_NONE 0x0000 +#define ELF_DATA_2LSB 0x0001 +#define ELF_DATA_2MSB 0x002 + +/* Legal values for p_type (segment type). */ + +#define ELF_PT_NULL 0 /* Program header table entry unused */ +#define ELF_PT_LOAD 1 /* Loadable program segment */ +#define ELF_PT_DYNAMIC 2 /* Dynamic linking information */ +#define ELF_PT_INTERP 3 /* Program interpreter */ +#define ELF_PT_NOTE 4 /* Auxiliary information */ +#define ELF_PT_SHLIB 5 +#define ELF_PT_PHDR 6 /* Entry for header table itself */ +#define ELF_PT_TLS 7 /* Thread-local storage segment */ +#define ELF_PT_NUM 8 /* Number of defined types */ +#define ELF_PT_LOOS 0x60000000 /* Start of OS-specific */ +#define ELF_PT_GNU_EH_FRAME 0x6474e550 /* GCC .eh_frame_hdr segment */ +#define ELF_PT_GNU_STACK 0x6474e551 /* Indicates stack executability */ +#define ELF_PT_GNU_RELRO 0x6474e552 /* Read-only after relocation */ +#define ELF_PT_LOSUNW 0x6ffffffa +#define ELF_PT_SUNWBSS 0x6ffffffa /* Sun Specific segment */ +#define ELF_PT_SUNWSTACK 0x6ffffffb /* Stack segment */ +#define ELF_PT_HISUNW 0x6fffffff +#define ELF_PT_HIOS 0x6fffffff /* End of OS-specific */ +#define ELF_PT_LOPROC 0x70000000 /* Start of processor-specific */ +#define ELF_PT_HIPROC 0x7fffffff /* End of processor-specific */ + +/* These constants define the permissions on sections in the program + header, p_flags. */ +#define PF_R 0x4 +#define PF_W 0x2 +#define PF_X 0x1 + +/** @brief Identification part of an ELF-file's header + * + * This structure keeps information about the file format + */ +typedef struct { + uint32_t magic; + uint8_t _class; + uint8_t data; + uint8_t version; + uint8_t pad[8]; + uint8_t nident; +} __attribute__ ((packed)) elf_ident_t; + +/** @brief Information about the executable + * + * ELF header\n + * This structure keeps information about the format of the executable itself. + */ +typedef struct { + elf_ident_t ident; + uint16_t type; + uint16_t machine; + uint32_t version; + uint32_t entry; + uint32_t ph_offset; + uint32_t sh_offset; + uint32_t flags; + uint16_t header_size; + uint16_t ph_entry_size; + uint16_t ph_entry_count; + uint16_t sh_entry_size; + uint16_t sh_entry_count; + uint16_t sh_str_table_index; +} __attribute__ ((packed)) elf_header_t; + +/** @brief program header information + * + * program header table\n + * This structure keeps information about the program header. + */ +typedef struct { + uint32_t type; + uint32_t offset; + uint32_t virt_addr; + uint32_t phys_addr; + uint32_t file_size; + uint32_t mem_size; + uint32_t flags; + uint32_t alignment; +} __attribute__ ((packed)) elf_program_header_t; + +/** @brief Information about ELF section + * + * ELF section\n + * This structure keeps information about a specific ELF section + */ +typedef struct { +uint32_t name; + uint32_t type; + uint32_t flags; + uint32_t addr; + uint32_t offset; + uint32_t size; + uint32_t link; + uint32_t info; + uint32_t align; + uint32_t enttry_size; +} __attribute__ ((packed)) elf_section_header_t; + +#ifdef __cplusplus +} +#endif +#endif