/* ELF support for BFD.
- Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
+ Copyright 1991, 1992, 1993, 1994, 1995, 1997, 1998, 2000, 2001, 2002,
+ 2003, 2006, 2007, 2008, 2010, 2011 Free Software Foundation, Inc.
Written by Fred Fish @ Cygnus Support, from information published
in "UNIX System V Release 4, Programmers Guide: ANSI C and
Programming Support Tools".
-This file is part of BFD, the Binary File Descriptor library.
+ This file is part of BFD, the Binary File Descriptor library.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
/* This file is part of ELF support for BFD, and contains the portions
that describe how ELF is represented internally in the BFD library.
I.E. it describes the in-memory representation of ELF. It requires
the elf-common.h file which contains the portions that are common to
- both the internal and external representations. */
-
+ both the internal and external representations. */
/* NOTE that these structures are not kept in the same order as they appear
in the object file. In some cases they've been reordered for more optimal
#ifndef _ELF_INTERNAL_H
#define _ELF_INTERNAL_H
+/* Special section indices, which may show up in st_shndx fields, among
+ other places. */
+
+#undef SHN_UNDEF
+#undef SHN_LORESERVE
+#undef SHN_LOPROC
+#undef SHN_HIPROC
+#undef SHN_LOOS
+#undef SHN_HIOS
+#undef SHN_ABS
+#undef SHN_COMMON
+#undef SHN_XINDEX
+#undef SHN_HIRESERVE
+#define SHN_UNDEF 0 /* Undefined section reference */
+#define SHN_LORESERVE (-0x100u) /* Begin range of reserved indices */
+#define SHN_LOPROC (-0x100u) /* Begin range of appl-specific */
+#define SHN_HIPROC (-0xE1u) /* End range of appl-specific */
+#define SHN_LOOS (-0xE0u) /* OS specific semantics, lo */
+#define SHN_HIOS (-0xC1u) /* OS specific semantics, hi */
+#define SHN_ABS (-0xFu) /* Associated symbol is absolute */
+#define SHN_COMMON (-0xEu) /* Associated symbol is in common */
+#define SHN_XINDEX (-0x1u) /* Section index is held elsewhere */
+#define SHN_HIRESERVE (-0x1u) /* End range of reserved indices */
+#define SHN_BAD (-0x101u) /* Used internally by bfd */
+
/* ELF Header */
#define EI_NIDENT 16 /* Size of e_ident[] */
typedef struct elf_internal_ehdr {
- unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */
- bfd_vma e_entry; /* Entry point virtual address */
- bfd_signed_vma e_phoff; /* Program header table file offset */
- bfd_signed_vma e_shoff; /* Section header table file offset */
- unsigned long e_version; /* Identifies object file version */
- unsigned long e_flags; /* Processor-specific flags */
- unsigned short e_type; /* Identifies object file type */
- unsigned short e_machine; /* Specifies required architecture */
- unsigned short e_ehsize; /* ELF header size in bytes */
- unsigned short e_phentsize; /* Program header table entry size */
- unsigned short e_phnum; /* Program header table entry count */
- unsigned short e_shentsize; /* Section header table entry size */
- unsigned short e_shnum; /* Section header table entry count */
- unsigned short e_shstrndx; /* Section header string table index */
+ unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */
+ bfd_vma e_entry; /* Entry point virtual address */
+ bfd_size_type e_phoff; /* Program header table file offset */
+ bfd_size_type e_shoff; /* Section header table file offset */
+ unsigned long e_version; /* Identifies object file version */
+ unsigned long e_flags; /* Processor-specific flags */
+ unsigned short e_type; /* Identifies object file type */
+ unsigned short e_machine; /* Specifies required architecture */
+ unsigned int e_ehsize; /* ELF header size in bytes */
+ unsigned int e_phentsize; /* Program header table entry size */
+ unsigned int e_phnum; /* Program header table entry count */
+ unsigned int e_shentsize; /* Section header table entry size */
+ unsigned int e_shnum; /* Section header table entry count */
+ unsigned int e_shstrndx; /* Section header string table index */
} Elf_Internal_Ehdr;
-#define elf32_internal_ehdr elf_internal_ehdr
-#define Elf32_Internal_Ehdr Elf_Internal_Ehdr
-#define elf64_internal_ehdr elf_internal_ehdr
-#define Elf64_Internal_Ehdr Elf_Internal_Ehdr
-
/* Program header */
struct elf_internal_phdr {
};
typedef struct elf_internal_phdr Elf_Internal_Phdr;
-#define elf32_internal_phdr elf_internal_phdr
-#define Elf32_Internal_Phdr Elf_Internal_Phdr
-#define elf64_internal_phdr elf_internal_phdr
-#define Elf64_Internal_Phdr Elf_Internal_Phdr
/* Section header */
unsigned int sh_type; /* Type of section */
bfd_vma sh_flags; /* Miscellaneous section attributes */
bfd_vma sh_addr; /* Section virtual addr at execution */
+ file_ptr sh_offset; /* Section file offset */
bfd_size_type sh_size; /* Size of section in bytes */
+ unsigned int sh_link; /* Index of another section */
+ unsigned int sh_info; /* Additional section information */
+ bfd_vma sh_addralign; /* Section alignment */
bfd_size_type sh_entsize; /* Entry size if section holds table */
- unsigned long sh_link; /* Index of another section */
- unsigned long sh_info; /* Additional section information */
- file_ptr sh_offset; /* Section file offset */
- unsigned int sh_addralign; /* Section alignment */
/* The internal rep also has some cached info associated with it. */
asection * bfd_section; /* Associated BFD section. */
- PTR contents; /* Section contents. */
+ unsigned char *contents; /* Section contents. */
} Elf_Internal_Shdr;
-#define elf32_internal_shdr elf_internal_shdr
-#define Elf32_Internal_Shdr Elf_Internal_Shdr
-#define elf64_internal_shdr elf_internal_shdr
-#define Elf64_Internal_Shdr Elf_Internal_Shdr
-
/* Symbol table entry */
struct elf_internal_sym {
bfd_vma st_size; /* Associated symbol size */
unsigned long st_name; /* Symbol name, index in string tbl */
unsigned char st_info; /* Type and binding attributes */
- unsigned char st_other; /* No defined meaning, 0 */
- unsigned short st_shndx; /* Associated section index */
+ unsigned char st_other; /* Visibilty, and target specific */
+ unsigned char st_target_internal; /* Internal-only information */
+ unsigned int st_shndx; /* Associated section index */
};
typedef struct elf_internal_sym Elf_Internal_Sym;
-#define elf32_internal_sym elf_internal_sym
-#define elf64_internal_sym elf_internal_sym
-#define Elf32_Internal_Sym Elf_Internal_Sym
-#define Elf64_Internal_Sym Elf_Internal_Sym
-
/* Note segments */
typedef struct elf_internal_note {
unsigned long namesz; /* Size of entry's owner string */
unsigned long descsz; /* Size of the note descriptor */
unsigned long type; /* Interpretation of the descriptor */
- char name[1]; /* Start of the name+desc data */
+ char * namedata; /* Start of the name+desc data */
+ char * descdata; /* Start of the desc data */
+ bfd_vma descpos; /* File offset of the descdata */
} Elf_Internal_Note;
-#define Elf32_Internal_Note Elf_Internal_Note
-#define elf32_internal_note elf_internal_note
/* Relocation Entries */
-typedef struct elf_internal_rel {
- bfd_vma r_offset; /* Location at which to apply the action */
- /* This needs to support 64-bit values in elf64. */
- bfd_vma r_info; /* index and type of relocation */
-} Elf_Internal_Rel;
-
-#define elf32_internal_rel elf_internal_rel
-#define Elf32_Internal_Rel Elf_Internal_Rel
-#define elf64_internal_rel elf_internal_rel
-#define Elf64_Internal_Rel Elf_Internal_Rel
-
typedef struct elf_internal_rela {
bfd_vma r_offset; /* Location at which to apply the action */
bfd_vma r_info; /* Index and Type of relocation */
- bfd_signed_vma r_addend; /* Constant addend used to compute value */
+ bfd_vma r_addend; /* Constant addend used to compute value */
} Elf_Internal_Rela;
-#define elf32_internal_rela elf_internal_rela
-#define elf64_internal_rela elf_internal_rela
-#define Elf32_Internal_Rela Elf_Internal_Rela
-#define Elf64_Internal_Rela Elf_Internal_Rela
-
/* dynamic section structure */
typedef struct elf_internal_dyn {
} d_un;
} Elf_Internal_Dyn;
-#define elf32_internal_dyn elf_internal_dyn
-#define elf64_internal_dyn elf_internal_dyn
-#define Elf32_Internal_Dyn Elf_Internal_Dyn
-#define Elf64_Internal_Dyn Elf_Internal_Dyn
+/* This structure appears in a SHT_GNU_verdef section. */
+
+typedef struct elf_internal_verdef {
+ unsigned short vd_version; /* Version number of structure. */
+ unsigned short vd_flags; /* Flags (VER_FLG_*). */
+ unsigned short vd_ndx; /* Version index. */
+ unsigned short vd_cnt; /* Number of verdaux entries. */
+ unsigned long vd_hash; /* Hash of name. */
+ unsigned long vd_aux; /* Offset to verdaux entries. */
+ unsigned long vd_next; /* Offset to next verdef. */
+
+ /* These fields are set up when BFD reads in the structure. FIXME:
+ It would be cleaner to store these in a different structure. */
+ bfd *vd_bfd; /* BFD. */
+ const char *vd_nodename; /* Version name. */
+ struct elf_internal_verdef *vd_nextdef; /* vd_next as pointer. */
+ struct elf_internal_verdaux *vd_auxptr; /* vd_aux as pointer. */
+ unsigned int vd_exp_refno; /* Used by the linker. */
+} Elf_Internal_Verdef;
+
+/* This structure appears in a SHT_GNU_verdef section. */
+
+typedef struct elf_internal_verdaux {
+ unsigned long vda_name; /* String table offset of name. */
+ unsigned long vda_next; /* Offset to next verdaux. */
+
+ /* These fields are set up when BFD reads in the structure. FIXME:
+ It would be cleaner to store these in a different structure. */
+ const char *vda_nodename; /* vda_name as pointer. */
+ struct elf_internal_verdaux *vda_nextptr; /* vda_next as pointer. */
+} Elf_Internal_Verdaux;
+
+/* This structure appears in a SHT_GNU_verneed section. */
+
+typedef struct elf_internal_verneed {
+ unsigned short vn_version; /* Version number of structure. */
+ unsigned short vn_cnt; /* Number of vernaux entries. */
+ unsigned long vn_file; /* String table offset of library name. */
+ unsigned long vn_aux; /* Offset to vernaux entries. */
+ unsigned long vn_next; /* Offset to next verneed. */
+
+ /* These fields are set up when BFD reads in the structure. FIXME:
+ It would be cleaner to store these in a different structure. */
+ bfd *vn_bfd; /* BFD. */
+ const char *vn_filename; /* vn_file as pointer. */
+ struct elf_internal_vernaux *vn_auxptr; /* vn_aux as pointer. */
+ struct elf_internal_verneed *vn_nextref; /* vn_nextref as pointer. */
+} Elf_Internal_Verneed;
+
+/* This structure appears in a SHT_GNU_verneed section. */
+
+typedef struct elf_internal_vernaux {
+ unsigned long vna_hash; /* Hash of dependency name. */
+ unsigned short vna_flags; /* Flags (VER_FLG_*). */
+ unsigned short vna_other; /* Unused. */
+ unsigned long vna_name; /* String table offset to version name. */
+ unsigned long vna_next; /* Offset to next vernaux. */
+
+ /* These fields are set up when BFD reads in the structure. FIXME:
+ It would be cleaner to store these in a different structure. */
+ const char *vna_nodename; /* vna_name as pointer. */
+ struct elf_internal_vernaux *vna_nextptr; /* vna_next as pointer. */
+} Elf_Internal_Vernaux;
+
+/* This structure appears in a SHT_GNU_versym section. This is not a
+ standard ELF structure; ELF just uses Elf32_Half. */
+
+typedef struct elf_internal_versym {
+ unsigned short vs_vers;
+} Elf_Internal_Versym;
+
+/* Structure for syminfo section. */
+typedef struct
+{
+ unsigned short int si_boundto;
+ unsigned short int si_flags;
+} Elf_Internal_Syminfo;
+
+/* This structure appears on the stack and in NT_AUXV core file notes. */
+typedef struct
+{
+ bfd_vma a_type;
+ bfd_vma a_val;
+} Elf_Internal_Auxv;
+
/* This structure is used to describe how sections should be assigned
to program segments. */
unsigned long p_flags;
/* Program segment physical address. */
bfd_vma p_paddr;
+ /* Program segment virtual address offset from section vma. */
+ bfd_vma p_vaddr_offset;
+ /* Program segment alignment. */
+ bfd_vma p_align;
+ /* Segment size in file and memory */
+ bfd_vma p_size;
+ /* Required size of filehdr + phdrs, if non-zero */
+ bfd_vma header_size;
/* Whether the p_flags field is valid; if not, the flags are based
on the section flags. */
unsigned int p_flags_valid : 1;
/* Whether the p_paddr field is valid; if not, the physical address
is based on the section lma values. */
unsigned int p_paddr_valid : 1;
- /* Number of sections. (Always 0 if p_type == PT_PHDR). */
+ /* Whether the p_align field is valid; if not, PT_LOAD segment
+ alignment is based on the default maximum page size. */
+ unsigned int p_align_valid : 1;
+ /* Whether the p_size field is valid; if not, the size are based
+ on the section sizes. */
+ unsigned int p_size_valid : 1;
+ /* Whether this segment includes the file header. */
+ unsigned int includes_filehdr : 1;
+ /* Whether this segment includes the program headers. */
+ unsigned int includes_phdrs : 1;
+ /* Number of sections (may be 0). */
unsigned int count;
/* Sections. Actual number of elements is in count field. */
asection *sections[1];
};
+/* .tbss is special. It doesn't contribute memory space to normal
+ segments and it doesn't take file space in normal segments. */
+#define ELF_TBSS_SPECIAL(sec_hdr, segment) \
+ (((sec_hdr)->sh_flags & SHF_TLS) != 0 \
+ && (sec_hdr)->sh_type == SHT_NOBITS \
+ && (segment)->p_type != PT_TLS)
+
+#define ELF_SECTION_SIZE(sec_hdr, segment) \
+ (ELF_TBSS_SPECIAL(sec_hdr, segment) ? 0 : (sec_hdr)->sh_size)
+
+/* Decide if the section SEC_HDR is in SEGMENT. If CHECK_VMA, then
+ VMAs are checked for alloc sections. If STRICT, then a zero size
+ section won't match at the end of a segment, unless the segment
+ is also zero size. Regardless of STRICT and CHECK_VMA, zero size
+ sections won't match at the start or end of PT_DYNAMIC, unless
+ PT_DYNAMIC is itself zero sized. */
+#define ELF_SECTION_IN_SEGMENT_1(sec_hdr, segment, check_vma, strict) \
+ ((/* Only PT_LOAD, PT_GNU_RELRO and PT_TLS segments can contain \
+ SHF_TLS sections. */ \
+ ((((sec_hdr)->sh_flags & SHF_TLS) != 0) \
+ && ((segment)->p_type == PT_TLS \
+ || (segment)->p_type == PT_GNU_RELRO \
+ || (segment)->p_type == PT_LOAD)) \
+ /* PT_TLS segment contains only SHF_TLS sections, PT_PHDR no \
+ sections at all. */ \
+ || (((sec_hdr)->sh_flags & SHF_TLS) == 0 \
+ && (segment)->p_type != PT_TLS \
+ && (segment)->p_type != PT_PHDR)) \
+ /* Any section besides one of type SHT_NOBITS must have file \
+ offsets within the segment. */ \
+ && ((sec_hdr)->sh_type == SHT_NOBITS \
+ || ((bfd_vma) (sec_hdr)->sh_offset >= (segment)->p_offset \
+ && (!(strict) \
+ || ((sec_hdr)->sh_offset - (segment)->p_offset \
+ <= (segment)->p_filesz - 1)) \
+ && (((sec_hdr)->sh_offset - (segment)->p_offset \
+ + ELF_SECTION_SIZE(sec_hdr, segment)) \
+ <= (segment)->p_filesz))) \
+ /* SHF_ALLOC sections must have VMAs within the segment. */ \
+ && (!(check_vma) \
+ || ((sec_hdr)->sh_flags & SHF_ALLOC) == 0 \
+ || ((sec_hdr)->sh_addr >= (segment)->p_vaddr \
+ && (!(strict) \
+ || ((sec_hdr)->sh_addr - (segment)->p_vaddr \
+ <= (segment)->p_memsz - 1)) \
+ && (((sec_hdr)->sh_addr - (segment)->p_vaddr \
+ + ELF_SECTION_SIZE(sec_hdr, segment)) \
+ <= (segment)->p_memsz))) \
+ /* No zero size sections at start or end of PT_DYNAMIC. */ \
+ && ((segment)->p_type != PT_DYNAMIC \
+ || (sec_hdr)->sh_size != 0 \
+ || (segment)->p_memsz == 0 \
+ || (((sec_hdr)->sh_type == SHT_NOBITS \
+ || ((bfd_vma) (sec_hdr)->sh_offset > (segment)->p_offset \
+ && ((sec_hdr)->sh_offset - (segment)->p_offset \
+ < (segment)->p_filesz))) \
+ && (((sec_hdr)->sh_flags & SHF_ALLOC) == 0 \
+ || ((sec_hdr)->sh_addr > (segment)->p_vaddr \
+ && ((sec_hdr)->sh_addr - (segment)->p_vaddr \
+ < (segment)->p_memsz))))))
+
+#define ELF_SECTION_IN_SEGMENT(sec_hdr, segment) \
+ (ELF_SECTION_IN_SEGMENT_1 (sec_hdr, segment, 1, 0))
+
+#define ELF_SECTION_IN_SEGMENT_STRICT(sec_hdr, segment) \
+ (ELF_SECTION_IN_SEGMENT_1 (sec_hdr, segment, 1, 1))
+
#endif /* _ELF_INTERNAL_H */
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