/* ELF support for BFD.
- Copyright 1991, 1992, 1993, 1994, 1995, 1997, 1998, 2000, 2001, 2002
- Free Software Foundation, Inc.
+ Copyright (C) 1991-2015 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[] */
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. */
unsigned long st_name; /* Symbol name, index in string tbl */
unsigned char st_info; /* Type and binding attributes */
unsigned char st_other; /* Visibilty, and target specific */
+ unsigned char st_target_internal; /* Internal-only information */
unsigned int st_shndx; /* Associated section index */
};
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;
+ /* 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. */
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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