source: trunk/kernel/libk/elf.h@ 156

Last change on this file since 156 was 156, checked in by max@…, 9 years ago

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1/* This file defines standard ELF types, structures, and macros.
2 Copyright (C) 1995-2003,2004,2005,2006,2007,2008,2009
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
20
21#ifndef _ELF_H_
22#define _ELF_H_ 1
23
24#include <hal_types.h>
25
26/* Standard ELF types. */
27
28/* Type for a 16-bit quantity. */
29typedef uint16_t Elf32_Half;
30
31/* Types for signed and unsigned 32-bit quantities. */
32typedef uint32_t Elf32_Word;
33typedef int32_t Elf32_Sword;
34
35/* Types for signed and unsigned 64-bit quantities. */
36typedef uint64_t Elf32_Xword;
37typedef int64_t Elf32_Sxword;
38
39/* Type of addresses. */
40typedef uint32_t Elf32_Addr;
41
42/* Type of file offsets. */
43typedef uint32_t Elf32_Off;
44
45/* Type for section indices, which are 16-bit quantities. */
46typedef uint16_t Elf32_Section;
47
48/* Type for version symbol information. */
49typedef Elf32_Half Elf32_Versym;
50
51/*************************************************************************************
52 * This structure defines the ELF file header (first bytes in the file)
53 *************************************************************************************/
54
55#define EI_NIDENT (16)
56
57typedef struct
58{
59 unsigned char e_ident[EI_NIDENT]; /* Magic number and other info */
60 Elf32_Half e_type; /* Object file type */
61 Elf32_Half e_machine; /* Architecture */
62 Elf32_Word e_version; /* Object file version */
63 Elf32_Addr e_entry; /* Entry point virtual address */
64 Elf32_Off e_phoff; /* Program header table file offset */
65 Elf32_Off e_shoff; /* Section header table file offset */
66 Elf32_Word e_flags; /* Processor-specific flags */
67 Elf32_Half e_ehsize; /* ELF header size in bytes */
68 Elf32_Half e_phentsize; /* Program header table entry size */
69 Elf32_Half e_phnum; /* Program header table entry count */
70 Elf32_Half e_shentsize; /* Section header table entry size */
71 Elf32_Half e_shnum; /* Section header table entry count */
72 Elf32_Half e_shstrndx; /* Section header string table index */
73}
74Elf32_Ehdr;
75
76/* Fields in the e_ident array. The EI_* macros are indices into the
77 array. The macros under each EI_* macro are the values the byte
78 may have. */
79
80#define EI_MAG0 0 /* File identification byte 0 index */
81#define ELFMAG0 0x7f /* Magic number byte 0 */
82
83#define EI_MAG1 1 /* File identification byte 1 index */
84#define ELFMAG1 'E' /* Magic number byte 1 */
85
86#define EI_MAG2 2 /* File identification byte 2 index */
87#define ELFMAG2 'L' /* Magic number byte 2 */
88
89#define EI_MAG3 3 /* File identification byte 3 index */
90#define ELFMAG3 'F' /* Magic number byte 3 */
91
92
93#define EI_CLASS 4 /* File class byte index */
94#define ELFCLASSNONE 0 /* Invalid class */
95#define ELFCLASS32 1 /* 32-bit objects */
96#define ELFCLASSNUM 3
97
98#define EI_DATA 5 /* Data encoding byte index */
99#define ELFDATANONE 0 /* Invalid data encoding */
100#define ELFDATA2LSB 1 /* 2's complement, little endian */
101#define ELFDATA2MSB 2 /* 2's complement, big endian */
102#define ELFDATANUM 3
103
104#define EI_VERSION 6 /* File version byte index */
105 /* Value must be EV_CURRENT */
106
107#define EI_OSABI 7 /* OS ABI identification */
108#define ELFOSABI_NONE 0 /* UNIX System V ABI */
109
110/* Legal values for e_type (object file type). */
111
112#define ET_NONE 0 /* No file type */
113#define ET_REL 1 /* Relocatable file */
114#define ET_EXEC 2 /* Executable file */
115#define ET_DYN 3 /* Shared object file */
116#define ET_CORE 4 /* Core file */
117#define ET_NUM 5 /* Number of defined types */
118#define ET_LOOS 0xfe00 /* OS-specific range start */
119#define ET_HIOS 0xfeff /* OS-specific range end */
120#define ET_LOPROC 0xff00 /* Processor-specific range start */
121#define ET_HIPROC 0xffff /* Processor-specific range end */
122
123/* Legal values for e_machine (architecture). */
124
125#define EM_NONE 0 /* No machine */
126#define EM_386 3 /* Intel 80386 */
127#define EM_860 7 /* Intel 80860 */
128#define EM_MIPS 8 /* MIPS R3000 big-endian */
129#define EM_MIPS_RS3_LE 10 /* MIPS R3000 little-endian */
130#define EM_PPC 20 /* PowerPC */
131#define EM_PPC64 21 /* PowerPC 64-bit */
132#define EM_ARM 40 /* ARM */
133
134/* Legal values for e_version (version). */
135
136#define EV_NONE 0 /* Invalid ELF version */
137#define EV_CURRENT 1 /* Current version */
138#define EV_NUM 2
139
140/* Program segment header. */
141
142typedef struct
143{
144 Elf32_Word p_type; /* Segment type */
145 Elf32_Off p_offset; /* Segment file offset */
146 Elf32_Addr p_vaddr; /* Segment virtual address */
147 Elf32_Addr p_paddr; /* Segment physical address */
148 Elf32_Word p_filesz; /* Segment size in file */
149 Elf32_Word p_memsz; /* Segment size in memory */
150 Elf32_Word p_flags; /* Segment flags */
151 Elf32_Word p_align; /* Segment alignment */
152}
153Elf32_Phdr;
154
155/* Legal values for p_type (segment type). */
156
157#define PT_NULL 0 /* Program header table entry unused */
158#define PT_LOAD 1 /* Loadable program segment */
159#define PT_DYNAMIC 2 /* Dynamic linking information */
160#define PT_INTERP 3 /* Program interpreter */
161#define PT_NOTE 4 /* Auxiliary information */
162#define PT_SHLIB 5 /* Reserved */
163#define PT_PHDR 6 /* Entry for header table itself */
164#define PT_TLS 7 /* Thread-local storage segment */
165#define PT_NUM 8 /* Number of defined types */
166#define PT_LOOS 0x60000000 /* Start of OS-specific */
167#define PT_GNU_EH_FRAME 0x6474e550 /* GCC .eh_frame_hdr segment */
168#define PT_GNU_STACK 0x6474e551 /* Indicates stack executability */
169#define PT_GNU_RELRO 0x6474e552 /* Read-only after relocation */
170#define PT_LOSUNW 0x6ffffffa
171#define PT_SUNWBSS 0x6ffffffa /* Sun Specific segment */
172#define PT_SUNWSTACK 0x6ffffffb /* Stack segment */
173#define PT_HISUNW 0x6fffffff
174#define PT_HIOS 0x6fffffff /* End of OS-specific */
175#define PT_LOPROC 0x70000000 /* Start of processor-specific */
176#define PT_HIPROC 0x7fffffff /* End of processor-specific */
177
178/* Legal values for p_flags (segment flags). */
179
180#define PF_X (1 << 0) /* Segment is executable */
181#define PF_W (1 << 1) /* Segment is writable */
182#define PF_R (1 << 2) /* Segment is readable */
183#define PF_MASKOS 0x0ff00000 /* OS-specific */
184#define PF_MASKPROC 0xf0000000 /* Processor-specific */
185
186
187
188/****************************************************************************************
189 * This function registers in VMM the CODE and DATA vsegs defined in the .elf file.
190 * The segments are not loaded in memory.
191 * It also registers the process entry point in VMM.
192 ****************************************************************************************
193 * @ pathname : .elf file pathname (in user space => must use hal_uspace API).
194 * @ process : local pointer on target process descriptor.
195 ***************************************************************************************/
196error_t elf_load_process( char * pathname,
197 process_t * process);
198
199#endif /* elf.h */
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