source: trunk/kernel/libk/elf.h @ 635

Last change on this file since 635 was 625, checked in by alain, 6 years ago

Fix a bug in the vmm_remove_vseg() function: the physical pages
associated to an user DATA vseg were released to the kernel when
the target process descriptor was in the reference cluster.
This physical pages release should be done only when the page
forks counter value is zero.
All other modifications are cosmetic.
File size: 9.3 KB
Line 
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_kernel_types.h>
25
26/*
27 * Standard ELF types.
28 */
29
30#define EI_NIDENT (16)
31
32/* 32bit version */
33typedef uint16_t Elf32_Half;
34typedef uint32_t Elf32_Word;
35typedef int32_t  Elf32_Sword;
36typedef uint32_t Elf32_Addr;
37typedef uint32_t Elf32_Off;
38
39/* 64bit version */
40typedef uint16_t Elf64_Half;
41typedef uint32_t Elf64_Word;
42typedef int32_t  Elf64_Sword;
43typedef uint64_t Elf64_Xword;
44typedef uint64_t Elf64_Addr;
45typedef uint64_t Elf64_Off;
46
47/* ELF header - 32bit version. */
48typedef struct
49{
50        unsigned char   e_ident[EI_NIDENT]; /* Magic number and other info */
51        Elf32_Half      e_type;             /* Object file type */
52        Elf32_Half      e_machine;          /* Architecture */
53        Elf32_Word      e_version;          /* Object file version */
54        Elf32_Addr      e_entry;            /* Entry point virtual address */
55        Elf32_Off       e_phoff;            /* Program header table file offset */
56        Elf32_Off       e_shoff;            /* Section header table file offset */
57        Elf32_Word      e_flags;            /* Processor-specific flags */
58        Elf32_Half      e_ehsize;           /* ELF header size in bytes */
59        Elf32_Half      e_phentsize;        /* Program header table entry size */
60        Elf32_Half      e_phnum;            /* Program header table entry count */
61        Elf32_Half      e_shentsize;        /* Section header table entry size */
62        Elf32_Half      e_shnum;            /* Section header table entry count */
63        Elf32_Half      e_shstrndx;         /* Section header string table index */
64}
65Elf32_Ehdr;
66
67/* ELF header - 64bit version. */
68typedef struct
69{
70        unsigned char   e_ident[EI_NIDENT]; /* Magic number and other info */
71        Elf64_Half      e_type;             /* Object file type */
72        Elf64_Half      e_machine;          /* Architecture */
73        Elf64_Word      e_version;          /* Object file version */
74        Elf64_Addr      e_entry;            /* Entry point virtual address */
75        Elf64_Off       e_phoff;            /* Program header table file offset */
76        Elf64_Off       e_shoff;            /* Section header table file offset */
77        Elf64_Word      e_flags;            /* Processor-specific flags */
78        Elf64_Half      e_ehsize;           /* ELF header size in bytes */
79        Elf64_Half      e_phentsize;        /* Program header table entry size */
80        Elf64_Half      e_phnum;            /* Program header table entry count */
81        Elf64_Half      e_shentsize;        /* Section header table entry size */
82        Elf64_Half      e_shnum;            /* Section header table entry count */
83        Elf64_Half      e_shstrndx;             /* Section header string table index */
84}
85Elf64_Ehdr;
86
87/*
88 * Fields in the e_ident array. The EI_* macros are indices into the
89 * array. The macros under each EI_* macro are the values the byte
90 * may have.
91 */
92#define EI_MAG0         0               /* File identification byte 0 index */
93#define ELFMAG0         0x7f            /* Magic number byte 0 */
94
95#define EI_MAG1         1               /* File identification byte 1 index */
96#define ELFMAG1         'E'             /* Magic number byte 1 */
97
98#define EI_MAG2         2               /* File identification byte 2 index */
99#define ELFMAG2         'L'             /* Magic number byte 2 */
100
101#define EI_MAG3         3               /* File identification byte 3 index */
102#define ELFMAG3         'F'             /* Magic number byte 3 */
103
104#define EI_CLASS        4               /* File class byte index */
105#define ELFCLASSNONE    0               /* Invalid class */
106#define ELFCLASS32      1               /* 32-bit objects */
107#define ELFCLASS64      2       /* 64-bit objects */
108
109#define ELFCLASSNUM     3
110
111#define EI_DATA         5               /* Data encoding byte index */
112#define ELFDATANONE     0               /* Invalid data encoding */
113#define ELFDATA2LSB     1               /* 2's complement, little endian */
114#define ELFDATA2MSB     2               /* 2's complement, big endian */
115#define ELFDATANUM      3
116
117#define EI_VERSION      6               /* File version byte index */
118                                        /* Value must be EV_CURRENT */
119
120#define EI_OSABI        7               /* OS ABI identification */
121#define ELFOSABI_NONE           0       /* UNIX System V ABI */
122
123/* Legal values for e_type (object file type).  */
124#define ET_NONE         0               /* No file type */
125#define ET_REL          1               /* Relocatable file */
126#define ET_EXEC         2               /* Executable file */
127#define ET_DYN          3               /* Shared object file */
128#define ET_CORE         4               /* Core file */
129#define ET_NUM          5               /* Number of defined types */
130#define ET_LOOS         0xfe00          /* OS-specific range start */
131#define ET_HIOS         0xfeff          /* OS-specific range end */
132#define ET_LOPROC       0xff00          /* Processor-specific range start */
133#define ET_HIPROC       0xffff          /* Processor-specific range end */
134
135/* Legal values for e_machine (architecture).  */
136#define EM_NONE          0              /* No machine */
137#define EM_MIPS          8              /* MIPS R3000 big-endian */
138#define EM_MIPS_RS3_LE  10              /* MIPS R3000 little-endian */
139#define EM_PPC          20              /* PowerPC */
140#define EM_PPC64        21              /* PowerPC 64-bit */
141#define EM_ARM          40              /* ARM */
142#define EM_X86_64       62              /* AMD x86-64 architecture */
143
144/* Legal values for e_version (version).  */
145#define EV_NONE         0               /* Invalid ELF version */
146#define EV_CURRENT      1               /* Current version */
147#define EV_NUM          2
148
149/* Program segment header - 32bit version. */
150typedef struct
151{
152        Elf32_Word  p_type;     /* Segment type */
153        Elf32_Off   p_offset;   /* Segment file offset */
154        Elf32_Addr  p_vaddr;    /* Segment virtual address */
155        Elf32_Addr  p_paddr;    /* Segment physical address */
156        Elf32_Word  p_filesz;   /* Segment size in file */
157        Elf32_Word  p_memsz;    /* Segment size in memory */
158        Elf32_Word  p_flags;    /* Segment flags */
159        Elf32_Word  p_align;    /* Segment alignment */
160}
161Elf32_Phdr;
162
163/* Program segment header - 64bit version. */
164typedef struct
165{
166        Elf64_Word  p_type;     /* Segment type */
167        Elf64_Word  p_flags;    /* Segment flags */
168        Elf64_Off   p_offset;   /* Segment file offset */
169        Elf64_Addr  p_vaddr;    /* Segment virtual address */
170        Elf64_Addr  p_paddr;    /* Segment physical address */
171        Elf64_Xword p_filesz;   /* Segment size in file */
172        Elf64_Xword p_memsz;    /* Segment size in memory */
173        Elf64_Xword p_align;    /* Segment alignment */
174}
175Elf64_Phdr;
176
177/* Legal values for p_type (segment type).  */
178#define PT_NULL         0               /* Program header table entry unused */
179#define PT_LOAD         1               /* Loadable program segment */
180#define PT_DYNAMIC      2               /* Dynamic linking information */
181#define PT_INTERP       3               /* Program interpreter */
182#define PT_NOTE         4               /* Auxiliary information */
183#define PT_SHLIB        5               /* Reserved */
184#define PT_PHDR         6               /* Entry for header table itself */
185#define PT_TLS          7               /* Thread-local storage segment */
186#define PT_NUM          8               /* Number of defined types */
187#define PT_LOOS         0x60000000      /* Start of OS-specific */
188#define PT_GNU_EH_FRAME 0x6474e550      /* GCC .eh_frame_hdr segment */
189#define PT_GNU_STACK    0x6474e551      /* Indicates stack executability */
190#define PT_GNU_RELRO    0x6474e552      /* Read-only after relocation */
191#define PT_LOSUNW       0x6ffffffa
192#define PT_SUNWBSS      0x6ffffffa      /* Sun Specific segment */
193#define PT_SUNWSTACK    0x6ffffffb      /* Stack segment */
194#define PT_HISUNW       0x6fffffff
195#define PT_HIOS         0x6fffffff      /* End of OS-specific */
196#define PT_LOPROC       0x70000000      /* Start of processor-specific */
197#define PT_HIPROC       0x7fffffff      /* End of processor-specific */
198
199/* Legal values for p_flags (segment flags).  */
200#define PF_X            (1 << 0)        /* Segment is executable */
201#define PF_W            (1 << 1)        /* Segment is writable */
202#define PF_R            (1 << 2)        /* Segment is readable */
203#define PF_MASKOS       0x0ff00000      /* OS-specific */
204#define PF_MASKPROC     0xf0000000      /* Processor-specific */
205
206#if defined(HAL_ELF_32_BITS)
207#define Elf_Half  Elf32_Half
208#define Elf_Word  Elf32_Word
209#define Elf_Sword Elf32_Sword
210#define Elf_Addr  Elf32_Addr
211#define Elf_Off   Elf32_Off
212#define Elf_Ehdr  Elf32_Ehdr
213#define Elf_Phdr  Elf32_Phdr
214#define ELFCLASS  ELFCLASS32
215#elif defined (HAL_ELF_64_BITS)
216#define Elf_Half  Elf64_Half
217#define Elf_Word  Elf64_Word
218#define Elf_Sword Elf64_Sword
219#define Elf_Xword Elf64_Xword
220#define Elf_Addr  Elf64_Addr
221#define Elf_Off   Elf64_Off
222#define Elf_Ehdr  Elf64_Ehdr
223#define Elf_Phdr  Elf64_Phdr
224#define ELFCLASS  ELFCLASS64
225#else
226#error "Must define HAL_ELF_64_BITS / HAL_ELF_32_BITS"
227#endif
228
229/****************************************************************************************
230 * This function registers in the VSL of the process identified by the <process>
231 * argument the CODE and DATA vsegs defined in the .elf file descriptor <file_xp>.
232 * The segments are not loaded in memory.
233 * It also registers the process entry point in VMM.
234 ****************************************************************************************
235 * @ file_xp  : extended pointer on .elf file descriptor.
236 * @ process  : local pointer on target process descriptor.
237 ***************************************************************************************/
238error_t elf_load_process( xptr_t      file_xp,
239                          process_t * process);
240
241#endif  /* elf.h */
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