-/* ELF support for BFD.
- Copyright (C) 1991 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".
+/* ELF executable support for BFD.
+ Copyright 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+/*
- /****************************************
+SECTION
+ ELF backends
- WARNING
+ BFD support for ELF formats is being worked on.
+ Currently, the best supported back ends are for sparc and i386
+ (running svr4 or Solaris 2).
- This is only a partial ELF implementation,
- incorporating only those parts that are
- required to get gdb up and running. It is
- expected that it will be expanded to a full
- ELF implementation at some future date.
+ Documentation of the internals of the support code still needs
+ to be written. The code is changing quickly enough that we
+ haven't bothered yet.
+ */
- Unimplemented stubs call abort() to ensure
- that they get proper attention if they are
- ever called. The stubs are here since
- this version was hacked from the COFF
- version, and thus they will probably
- go away or get expanded appropriately in a
- future version.
+#include "bfd.h"
+#include "sysdep.h"
+#include "bfdlink.h"
+#include "libbfd.h"
+#define ARCH_SIZE 0
+#include "elf-bfd.h"
- fnf@cygnus.com
+static INLINE struct elf_segment_map *make_mapping
+ PARAMS ((bfd *, asection **, unsigned int, unsigned int, boolean));
+static boolean map_sections_to_segments PARAMS ((bfd *));
+static int elf_sort_sections PARAMS ((const PTR, const PTR));
+static boolean assign_file_positions_for_segments PARAMS ((bfd *));
+static boolean assign_file_positions_except_relocs PARAMS ((bfd *));
+static boolean prep_headers PARAMS ((bfd *));
+static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **));
+static boolean copy_private_bfd_data PARAMS ((bfd *, bfd *));
+static char *elf_read PARAMS ((bfd *, long, unsigned int));
+static void elf_fake_sections PARAMS ((bfd *, asection *, PTR));
+static boolean assign_section_numbers PARAMS ((bfd *));
+static INLINE int sym_is_global PARAMS ((bfd *, asymbol *));
+static boolean elf_map_symbols PARAMS ((bfd *));
+static bfd_size_type get_program_header_size PARAMS ((bfd *));
- *****************************************/
+/* Swap version information in and out. The version information is
+ currently size independent. If that ever changes, this code will
+ need to move into elfcode.h. */
+/* Swap in a Verdef structure. */
-/* Problems and other issues to resolve.
+void
+_bfd_elf_swap_verdef_in (abfd, src, dst)
+ bfd *abfd;
+ const Elf_External_Verdef *src;
+ Elf_Internal_Verdef *dst;
+{
+ dst->vd_version = bfd_h_get_16 (abfd, src->vd_version);
+ dst->vd_flags = bfd_h_get_16 (abfd, src->vd_flags);
+ dst->vd_ndx = bfd_h_get_16 (abfd, src->vd_ndx);
+ dst->vd_cnt = bfd_h_get_16 (abfd, src->vd_cnt);
+ dst->vd_hash = bfd_h_get_32 (abfd, src->vd_hash);
+ dst->vd_aux = bfd_h_get_32 (abfd, src->vd_aux);
+ dst->vd_next = bfd_h_get_32 (abfd, src->vd_next);
+}
- (1) BFD expects there to be some fixed number of "sections" in
- the object file. I.E. there is a "section_count" variable in the
- bfd structure which contains the number of sections. However, ELF
- supports multiple "views" of a file. In particular, with current
- implementations, executable files typically have two tables, a
- program header table and a section header table, both of which
- partition the executable.
+/* Swap out a Verdef structure. */
- In ELF-speak, the "linking view" of the file uses the section header
- table to access "sections" within the file, and the "execution view"
- uses the program header table to access "segments" within the file.
- "Segments" typically may contain all the data from one or more
- "sections".
+void
+_bfd_elf_swap_verdef_out (abfd, src, dst)
+ bfd *abfd;
+ const Elf_Internal_Verdef *src;
+ Elf_External_Verdef *dst;
+{
+ bfd_h_put_16 (abfd, src->vd_version, dst->vd_version);
+ bfd_h_put_16 (abfd, src->vd_flags, dst->vd_flags);
+ bfd_h_put_16 (abfd, src->vd_ndx, dst->vd_ndx);
+ bfd_h_put_16 (abfd, src->vd_cnt, dst->vd_cnt);
+ bfd_h_put_32 (abfd, src->vd_hash, dst->vd_hash);
+ bfd_h_put_32 (abfd, src->vd_aux, dst->vd_aux);
+ bfd_h_put_32 (abfd, src->vd_next, dst->vd_next);
+}
- Note that the section header table is optional in ELF executables,
- but it is this information that is most useful to gdb. If the
- section header table is missing, then gdb should probably try
- to make do with the program header table. (FIXME)
+/* Swap in a Verdaux structure. */
-*/
+void
+_bfd_elf_swap_verdaux_in (abfd, src, dst)
+ bfd *abfd;
+ const Elf_External_Verdaux *src;
+ Elf_Internal_Verdaux *dst;
+{
+ dst->vda_name = bfd_h_get_32 (abfd, src->vda_name);
+ dst->vda_next = bfd_h_get_32 (abfd, src->vda_next);
+}
-#include <ansidecl.h>
-#include <sysdep.h>
-#include "bfd.h"
-#include "libbfd.h"
-#include "obstack.h"
-#include "elf-common.h"
-#include "elf-internal.h"
-#include "elf-external.h"
+/* Swap out a Verdaux structure. */
-/* Forward data declarations */
-extern bfd_target elf_little_vec, elf_big_vec;
+void
+_bfd_elf_swap_verdaux_out (abfd, src, dst)
+ bfd *abfd;
+ const Elf_Internal_Verdaux *src;
+ Elf_External_Verdaux *dst;
+{
+ bfd_h_put_32 (abfd, src->vda_name, dst->vda_name);
+ bfd_h_put_32 (abfd, src->vda_next, dst->vda_next);
+}
-/* Translate an ELF header in external format into an ELF header in internal
- format. */
+/* Swap in a Verneed structure. */
-static void
-DEFUN(bfd_swap_ehdr_in,(abfd, src, dst),
- bfd *abfd AND
- Elf_External_Ehdr *src AND
- Elf_Internal_Ehdr *dst)
-{
- bcopy (src -> e_ident, dst -> e_ident, EI_NIDENT);
- dst -> e_type = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_type);
- dst -> e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_machine);
- dst -> e_version = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_version);
- dst -> e_entry = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_entry);
- dst -> e_phoff = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_phoff);
- dst -> e_shoff = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_shoff);
- dst -> e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_flags);
- dst -> e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_ehsize);
- dst -> e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_phentsize);
- dst -> e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_phnum);
- dst -> e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shentsize);
- dst -> e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shnum);
- dst -> e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shstrndx);
-}
-
-
-/* Translate an ELF section header table entry in external format into an
- ELF section header table entry in internal format. */
+void
+_bfd_elf_swap_verneed_in (abfd, src, dst)
+ bfd *abfd;
+ const Elf_External_Verneed *src;
+ Elf_Internal_Verneed *dst;
+{
+ dst->vn_version = bfd_h_get_16 (abfd, src->vn_version);
+ dst->vn_cnt = bfd_h_get_16 (abfd, src->vn_cnt);
+ dst->vn_file = bfd_h_get_32 (abfd, src->vn_file);
+ dst->vn_aux = bfd_h_get_32 (abfd, src->vn_aux);
+ dst->vn_next = bfd_h_get_32 (abfd, src->vn_next);
+}
-static void
-DEFUN(bfd_swap_shdr_in,(abfd, src, dst),
- bfd *abfd AND
- Elf_External_Shdr *src AND
- Elf_Internal_Shdr *dst)
+/* Swap out a Verneed structure. */
+
+void
+_bfd_elf_swap_verneed_out (abfd, src, dst)
+ bfd *abfd;
+ const Elf_Internal_Verneed *src;
+ Elf_External_Verneed *dst;
{
- dst -> sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_name);
- dst -> sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_type);
- dst -> sh_flags = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_flags);
- dst -> sh_addr = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_addr);
- dst -> sh_offset = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_offset);
- dst -> sh_size = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_size);
- dst -> sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_link);
- dst -> sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_info);
- dst -> sh_addralign = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_addralign);
- dst -> sh_entsize = bfd_h_get_32 (abfd, (bfd_byte *) src -> sh_entsize);
+ bfd_h_put_16 (abfd, src->vn_version, dst->vn_version);
+ bfd_h_put_16 (abfd, src->vn_cnt, dst->vn_cnt);
+ bfd_h_put_32 (abfd, src->vn_file, dst->vn_file);
+ bfd_h_put_32 (abfd, src->vn_aux, dst->vn_aux);
+ bfd_h_put_32 (abfd, src->vn_next, dst->vn_next);
}
+/* Swap in a Vernaux structure. */
-/* Create a new bfd section from an ELF section header. */
+void
+_bfd_elf_swap_vernaux_in (abfd, src, dst)
+ bfd *abfd;
+ const Elf_External_Vernaux *src;
+ Elf_Internal_Vernaux *dst;
+{
+ dst->vna_hash = bfd_h_get_32 (abfd, src->vna_hash);
+ dst->vna_flags = bfd_h_get_16 (abfd, src->vna_flags);
+ dst->vna_other = bfd_h_get_16 (abfd, src->vna_other);
+ dst->vna_name = bfd_h_get_32 (abfd, src->vna_name);
+ dst->vna_next = bfd_h_get_32 (abfd, src->vna_next);
+}
-static boolean
-DEFUN(bfd_section_from_shdr, (abfd, hdr, shstrtab),
- bfd *abfd AND
- Elf_Internal_Shdr *hdr AND
- char *shstrtab)
+/* Swap out a Vernaux structure. */
+
+void
+_bfd_elf_swap_vernaux_out (abfd, src, dst)
+ bfd *abfd;
+ const Elf_Internal_Vernaux *src;
+ Elf_External_Vernaux *dst;
{
- asection *newsect;
- char *name;
+ bfd_h_put_32 (abfd, src->vna_hash, dst->vna_hash);
+ bfd_h_put_16 (abfd, src->vna_flags, dst->vna_flags);
+ bfd_h_put_16 (abfd, src->vna_other, dst->vna_other);
+ bfd_h_put_32 (abfd, src->vna_name, dst->vna_name);
+ bfd_h_put_32 (abfd, src->vna_next, dst->vna_next);
+}
- name = hdr -> sh_name ? shstrtab + hdr -> sh_name : "unnamed";
- newsect = bfd_make_section (abfd, name);
- newsect -> vma = hdr -> sh_addr;
- newsect -> size = hdr -> sh_size;
- if (!(hdr -> sh_type == SHT_NOBITS))
- {
- newsect -> filepos = hdr -> sh_offset;
- newsect -> flags |= SEC_HAS_CONTENTS;
- }
- if (hdr -> sh_flags & SHF_ALLOC)
+/* Swap in a Versym structure. */
+
+void
+_bfd_elf_swap_versym_in (abfd, src, dst)
+ bfd *abfd;
+ const Elf_External_Versym *src;
+ Elf_Internal_Versym *dst;
+{
+ dst->vs_vers = bfd_h_get_16 (abfd, src->vs_vers);
+}
+
+/* Swap out a Versym structure. */
+
+void
+_bfd_elf_swap_versym_out (abfd, src, dst)
+ bfd *abfd;
+ const Elf_Internal_Versym *src;
+ Elf_External_Versym *dst;
+{
+ bfd_h_put_16 (abfd, src->vs_vers, dst->vs_vers);
+}
+
+/* Standard ELF hash function. Do not change this function; you will
+ cause invalid hash tables to be generated. (Well, you would if this
+ were being used yet.) */
+unsigned long
+bfd_elf_hash (name)
+ CONST unsigned char *name;
+{
+ unsigned long h = 0;
+ unsigned long g;
+ int ch;
+
+ while ((ch = *name++) != '\0')
{
- newsect -> flags |= SEC_ALLOC;
- if (hdr -> sh_type != SHT_NOBITS)
+ h = (h << 4) + ch;
+ if ((g = (h & 0xf0000000)) != 0)
{
- newsect -> flags |= SEC_LOAD;
+ h ^= g >> 24;
+ h &= ~g;
}
}
- if (!(hdr -> sh_flags & SHF_WRITE))
- {
- newsect -> flags |= SEC_READONLY;
- }
- if (hdr -> sh_flags & SHF_EXECINSTR)
- {
- newsect -> flags |= SEC_CODE; /* FIXME: may only contain SOME code */
- }
- if (hdr -> sh_type == SHT_SYMTAB)
+ return h;
+}
+
+/* Read a specified number of bytes at a specified offset in an ELF
+ file, into a newly allocated buffer, and return a pointer to the
+ buffer. */
+
+static char *
+elf_read (abfd, offset, size)
+ bfd * abfd;
+ long offset;
+ unsigned int size;
+{
+ char *buf;
+
+ if ((buf = bfd_alloc (abfd, size)) == NULL)
+ return NULL;
+ if (bfd_seek (abfd, offset, SEEK_SET) == -1)
+ return NULL;
+ if (bfd_read ((PTR) buf, size, 1, abfd) != size)
{
- abfd -> flags |= HAS_SYMS;
+ if (bfd_get_error () != bfd_error_system_call)
+ bfd_set_error (bfd_error_file_truncated);
+ return NULL;
}
+ return buf;
+}
+
+boolean
+bfd_elf_mkobject (abfd)
+ bfd * abfd;
+{
+ /* this just does initialization */
+ /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
+ elf_tdata (abfd) = (struct elf_obj_tdata *)
+ bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
+ if (elf_tdata (abfd) == 0)
+ return false;
+ /* since everything is done at close time, do we need any
+ initialization? */
- return (true);
+ return true;
}
-/* Begin processing a given object.
+char *
+bfd_elf_get_str_section (abfd, shindex)
+ bfd * abfd;
+ unsigned int shindex;
+{
+ Elf_Internal_Shdr **i_shdrp;
+ char *shstrtab = NULL;
+ unsigned int offset;
+ unsigned int shstrtabsize;
- First we validate the file by reading in the ELF header and checking
- the magic number.
+ i_shdrp = elf_elfsections (abfd);
+ if (i_shdrp == 0 || i_shdrp[shindex] == 0)
+ return 0;
- */
+ shstrtab = (char *) i_shdrp[shindex]->contents;
+ if (shstrtab == NULL)
+ {
+ /* No cached one, attempt to read, and cache what we read. */
+ offset = i_shdrp[shindex]->sh_offset;
+ shstrtabsize = i_shdrp[shindex]->sh_size;
+ shstrtab = elf_read (abfd, offset, shstrtabsize);
+ i_shdrp[shindex]->contents = (PTR) shstrtab;
+ }
+ return shstrtab;
+}
-static bfd_target *
-DEFUN (elf_object_p, (abfd), bfd *abfd)
+char *
+bfd_elf_string_from_elf_section (abfd, shindex, strindex)
+ bfd * abfd;
+ unsigned int shindex;
+ unsigned int strindex;
{
- Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
- Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */
- Elf_External_Shdr *x_shdr; /* Section header table, external form */
- Elf_Internal_Shdr *i_shdr; /* Section header table, internal form */
- int shindex;
- char *shstrtab; /* Internal copy of section header stringtab */
- int shstrtabsize; /* Size of section header string table */
-
- /* Read in the ELF header in external format. */
+ Elf_Internal_Shdr *hdr;
- if (bfd_read ((PTR) &x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
+ if (strindex == 0)
+ return "";
+
+ hdr = elf_elfsections (abfd)[shindex];
+
+ if (hdr->contents == NULL
+ && bfd_elf_get_str_section (abfd, shindex) == NULL)
+ return NULL;
+
+ if (strindex >= hdr->sh_size)
{
- bfd_error = system_call_error;
- return (NULL);
+ (*_bfd_error_handler)
+ ("%s: invalid string offset %u >= %lu for section `%s'",
+ bfd_get_filename (abfd), strindex, (unsigned long) hdr->sh_size,
+ ((shindex == elf_elfheader(abfd)->e_shstrndx
+ && strindex == hdr->sh_name)
+ ? ".shstrtab"
+ : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
+ return "";
}
- /* Now check to see if we have a valid ELF file, and one that BFD can
- make use of. The magic number must match, the address size ('class')
- and byte-swapping must match our XVEC entry, and it must have a
- section header table (FIXME: See comments re sections at top of this
- file). */
+ return ((char *) hdr->contents) + strindex;
+}
+
+/* Make a BFD section from an ELF section. We store a pointer to the
+ BFD section in the bfd_section field of the header. */
+
+boolean
+_bfd_elf_make_section_from_shdr (abfd, hdr, name)
+ bfd *abfd;
+ Elf_Internal_Shdr *hdr;
+ const char *name;
+{
+ asection *newsect;
+ flagword flags;
- if (x_ehdr.e_ident[EI_MAG0] != ELFMAG0 ||
- x_ehdr.e_ident[EI_MAG1] != ELFMAG1 ||
- x_ehdr.e_ident[EI_MAG2] != ELFMAG2 ||
- x_ehdr.e_ident[EI_MAG3] != ELFMAG3)
+ if (hdr->bfd_section != NULL)
{
-wrong:
- bfd_error = wrong_format;
- return (NULL);
+ BFD_ASSERT (strcmp (name,
+ bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
+ return true;
}
- /* FIXME, Check EI_VERSION here ! */
+ newsect = bfd_make_section_anyway (abfd, name);
+ if (newsect == NULL)
+ return false;
- switch (x_ehdr.e_ident[EI_CLASS]) {
- case ELFCLASSNONE: /* address size not specified */
- goto wrong; /* No support if can't tell address size */
- case ELFCLASS32: /* 32-bit addresses */
- break;
- case ELFCLASS64: /* 64-bit addresses */
- goto wrong; /* FIXME: 64 bits not yet supported */
- default:
- goto wrong; /* No support if unknown address class */
- }
+ newsect->filepos = hdr->sh_offset;
- /* Switch xvec to match the specified byte order. */
- switch (x_ehdr.e_ident[EI_DATA]) {
- case ELFDATA2MSB: /* Big-endian */
- abfd->xvec = &elf_big_vec;
- break;
- case ELFDATA2LSB: /* Little-endian */
- abfd->xvec = &elf_little_vec;
- case ELFDATANONE: /* No data encoding specified */
- default: /* Unknown data encoding specified */
- goto wrong;
- }
-
- /* Now that we know the byte order, swap in the rest of the header */
- bfd_swap_ehdr_in (abfd, &x_ehdr, &i_ehdr);
- if (x_ehdr.e_shoff == 0)
- goto wrong;
+ if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
+ || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
+ || ! bfd_set_section_alignment (abfd, newsect,
+ bfd_log2 (hdr->sh_addralign)))
+ return false;
- if (i_ehdr.e_type == ET_EXEC || i_ehdr.e_type == ET_DYN)
+ flags = SEC_NO_FLAGS;
+ if (hdr->sh_type != SHT_NOBITS)
+ flags |= SEC_HAS_CONTENTS;
+ if ((hdr->sh_flags & SHF_ALLOC) != 0)
{
- abfd -> flags |= EXEC_P;
+ flags |= SEC_ALLOC;
+ if (hdr->sh_type != SHT_NOBITS)
+ flags |= SEC_LOAD;
}
+ if ((hdr->sh_flags & SHF_WRITE) == 0)
+ flags |= SEC_READONLY;
+ if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
+ flags |= SEC_CODE;
+ else if ((flags & SEC_LOAD) != 0)
+ flags |= SEC_DATA;
+
+ /* The debugging sections appear to be recognized only by name, not
+ any sort of flag. */
+ if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0
+ || strncmp (name, ".line", sizeof ".line" - 1) == 0
+ || strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
+ flags |= SEC_DEBUGGING;
+
+ /* As a GNU extension, if the name begins with .gnu.linkonce, we
+ only link a single copy of the section. This is used to support
+ g++. g++ will emit each template expansion in its own section.
+ The symbols will be defined as weak, so that multiple definitions
+ are permitted. The GNU linker extension is to actually discard
+ all but one of the sections. */
+ if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
+ flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
- /* Allocate space for copies of the section header table in external
- and internal form, seek to the section header table in the file,
- read it in, and convert it to internal form. As a simple sanity
- check, verify that the what BFD thinks is the size of each section
- header table entry actually matches the size recorded in the file. */
+ if (! bfd_set_section_flags (abfd, newsect, flags))
+ return false;
- if (i_ehdr.e_shentsize != sizeof (*x_shdr))
- goto wrong;
- if ((x_shdr = (Elf_External_Shdr *)
- bfd_alloc (abfd, sizeof (*x_shdr) * i_ehdr.e_shnum)) == NULL)
+ if ((flags & SEC_ALLOC) != 0)
{
- bfd_error = no_memory;
- return (NULL);
+ Elf_Internal_Phdr *phdr;
+ unsigned int i;
+
+ /* Look through the phdrs to see if we need to adjust the lma. */
+ phdr = elf_tdata (abfd)->phdr;
+ for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
+ {
+ if (phdr->p_type == PT_LOAD
+ && phdr->p_paddr != 0
+ && phdr->p_vaddr != phdr->p_paddr
+ && phdr->p_vaddr <= hdr->sh_addr
+ && phdr->p_vaddr + phdr->p_memsz >= hdr->sh_addr + hdr->sh_size
+ && ((flags & SEC_LOAD) == 0
+ || (phdr->p_offset <= hdr->sh_offset
+ && (phdr->p_offset + phdr->p_filesz
+ >= hdr->sh_offset + hdr->sh_size))))
+ {
+ newsect->lma += phdr->p_paddr - phdr->p_vaddr;
+ break;
+ }
+ }
}
- if ((i_shdr = (Elf_Internal_Shdr *)
- bfd_alloc (abfd, sizeof (*i_shdr) * i_ehdr.e_shnum)) == NULL)
+
+ hdr->bfd_section = newsect;
+ elf_section_data (newsect)->this_hdr = *hdr;
+
+ return true;
+}
+
+/*
+INTERNAL_FUNCTION
+ bfd_elf_find_section
+
+SYNOPSIS
+ struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
+
+DESCRIPTION
+ Helper functions for GDB to locate the string tables.
+ Since BFD hides string tables from callers, GDB needs to use an
+ internal hook to find them. Sun's .stabstr, in particular,
+ isn't even pointed to by the .stab section, so ordinary
+ mechanisms wouldn't work to find it, even if we had some.
+*/
+
+struct elf_internal_shdr *
+bfd_elf_find_section (abfd, name)
+ bfd * abfd;
+ char *name;
+{
+ Elf_Internal_Shdr **i_shdrp;
+ char *shstrtab;
+ unsigned int max;
+ unsigned int i;
+
+ i_shdrp = elf_elfsections (abfd);
+ if (i_shdrp != NULL)
{
- bfd_error = no_memory;
- return (NULL);
+ shstrtab = bfd_elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx);
+ if (shstrtab != NULL)
+ {
+ max = elf_elfheader (abfd)->e_shnum;
+ for (i = 1; i < max; i++)
+ if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
+ return i_shdrp[i];
+ }
}
- if (bfd_seek (abfd, i_ehdr.e_shoff, SEEK_SET) == -1)
+ return 0;
+}
+
+const char *const bfd_elf_section_type_names[] = {
+ "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
+ "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
+ "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
+};
+
+/* ELF relocs are against symbols. If we are producing relocateable
+ output, and the reloc is against an external symbol, and nothing
+ has given us any additional addend, the resulting reloc will also
+ be against the same symbol. In such a case, we don't want to
+ change anything about the way the reloc is handled, since it will
+ all be done at final link time. Rather than put special case code
+ into bfd_perform_relocation, all the reloc types use this howto
+ function. It just short circuits the reloc if producing
+ relocateable output against an external symbol. */
+
+/*ARGSUSED*/
+bfd_reloc_status_type
+bfd_elf_generic_reloc (abfd,
+ reloc_entry,
+ symbol,
+ data,
+ input_section,
+ output_bfd,
+ error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ if (output_bfd != (bfd *) NULL
+ && (symbol->flags & BSF_SECTION_SYM) == 0
+ && (! reloc_entry->howto->partial_inplace
+ || reloc_entry->addend == 0))
{
- bfd_error = system_call_error;
- return (NULL);
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
}
- for (shindex = 0; shindex < i_ehdr.e_shnum; shindex++)
+
+ return bfd_reloc_continue;
+}
+\f
+/* Print out the program headers. */
+
+boolean
+_bfd_elf_print_private_bfd_data (abfd, farg)
+ bfd *abfd;
+ PTR farg;
+{
+ FILE *f = (FILE *) farg;
+ Elf_Internal_Phdr *p;
+ asection *s;
+ bfd_byte *dynbuf = NULL;
+
+ p = elf_tdata (abfd)->phdr;
+ if (p != NULL)
{
- if (bfd_read ((PTR) (x_shdr + shindex), sizeof (*x_shdr), 1, abfd)
- != sizeof (*x_shdr))
+ unsigned int i, c;
+
+ fprintf (f, "\nProgram Header:\n");
+ c = elf_elfheader (abfd)->e_phnum;
+ for (i = 0; i < c; i++, p++)
{
- bfd_error = system_call_error;
- return (NULL);
+ const char *s;
+ char buf[20];
+
+ switch (p->p_type)
+ {
+ case PT_NULL: s = "NULL"; break;
+ case PT_LOAD: s = "LOAD"; break;
+ case PT_DYNAMIC: s = "DYNAMIC"; break;
+ case PT_INTERP: s = "INTERP"; break;
+ case PT_NOTE: s = "NOTE"; break;
+ case PT_SHLIB: s = "SHLIB"; break;
+ case PT_PHDR: s = "PHDR"; break;
+ default: sprintf (buf, "0x%lx", p->p_type); s = buf; break;
+ }
+ fprintf (f, "%8s off 0x", s);
+ fprintf_vma (f, p->p_offset);
+ fprintf (f, " vaddr 0x");
+ fprintf_vma (f, p->p_vaddr);
+ fprintf (f, " paddr 0x");
+ fprintf_vma (f, p->p_paddr);
+ fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
+ fprintf (f, " filesz 0x");
+ fprintf_vma (f, p->p_filesz);
+ fprintf (f, " memsz 0x");
+ fprintf_vma (f, p->p_memsz);
+ fprintf (f, " flags %c%c%c",
+ (p->p_flags & PF_R) != 0 ? 'r' : '-',
+ (p->p_flags & PF_W) != 0 ? 'w' : '-',
+ (p->p_flags & PF_X) != 0 ? 'x' : '-');
+ if ((p->p_flags &~ (PF_R | PF_W | PF_X)) != 0)
+ fprintf (f, " %lx", p->p_flags &~ (PF_R | PF_W | PF_X));
+ fprintf (f, "\n");
}
- bfd_swap_shdr_in (abfd, x_shdr + shindex, i_shdr + shindex);
}
- /* Read in the string table containing the names of the sections. We
- will need the base pointer to this table later. */
-
- shstrtabsize = i_shdr[i_ehdr.e_shstrndx].sh_size;
- if ((shstrtab = bfd_alloc (abfd, shstrtabsize)) == NULL)
+ s = bfd_get_section_by_name (abfd, ".dynamic");
+ if (s != NULL)
{
- bfd_error = no_memory;
- return (NULL);
+ int elfsec;
+ unsigned long link;
+ bfd_byte *extdyn, *extdynend;
+ size_t extdynsize;
+ void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
+
+ fprintf (f, "\nDynamic Section:\n");
+
+ dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
+ if (dynbuf == NULL)
+ goto error_return;
+ if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
+ s->_raw_size))
+ goto error_return;
+
+ elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
+ if (elfsec == -1)
+ goto error_return;
+ link = elf_elfsections (abfd)[elfsec]->sh_link;
+
+ extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
+ swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
+
+ extdyn = dynbuf;
+ extdynend = extdyn + s->_raw_size;
+ for (; extdyn < extdynend; extdyn += extdynsize)
+ {
+ Elf_Internal_Dyn dyn;
+ const char *name;
+ char ab[20];
+ boolean stringp;
+
+ (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
+
+ if (dyn.d_tag == DT_NULL)
+ break;
+
+ stringp = false;
+ switch (dyn.d_tag)
+ {
+ default:
+ sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
+ name = ab;
+ break;
+
+ case DT_NEEDED: name = "NEEDED"; stringp = true; break;
+ case DT_PLTRELSZ: name = "PLTRELSZ"; break;
+ case DT_PLTGOT: name = "PLTGOT"; break;
+ case DT_HASH: name = "HASH"; break;
+ case DT_STRTAB: name = "STRTAB"; break;
+ case DT_SYMTAB: name = "SYMTAB"; break;
+ case DT_RELA: name = "RELA"; break;
+ case DT_RELASZ: name = "RELASZ"; break;
+ case DT_RELAENT: name = "RELAENT"; break;
+ case DT_STRSZ: name = "STRSZ"; break;
+ case DT_SYMENT: name = "SYMENT"; break;
+ case DT_INIT: name = "INIT"; break;
+ case DT_FINI: name = "FINI"; break;
+ case DT_SONAME: name = "SONAME"; stringp = true; break;
+ case DT_RPATH: name = "RPATH"; stringp = true; break;
+ case DT_SYMBOLIC: name = "SYMBOLIC"; break;
+ case DT_REL: name = "REL"; break;
+ case DT_RELSZ: name = "RELSZ"; break;
+ case DT_RELENT: name = "RELENT"; break;
+ case DT_PLTREL: name = "PLTREL"; break;
+ case DT_DEBUG: name = "DEBUG"; break;
+ case DT_TEXTREL: name = "TEXTREL"; break;
+ case DT_JMPREL: name = "JMPREL"; break;
+ case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break;
+ case DT_FILTER: name = "FILTER"; stringp = true; break;
+ case DT_VERSYM: name = "VERSYM"; break;
+ case DT_VERDEF: name = "VERDEF"; break;
+ case DT_VERDEFNUM: name = "VERDEFNUM"; break;
+ case DT_VERNEED: name = "VERNEED"; break;
+ case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
+ }
+
+ fprintf (f, " %-11s ", name);
+ if (! stringp)
+ fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
+ else
+ {
+ const char *string;
+
+ string = bfd_elf_string_from_elf_section (abfd, link,
+ dyn.d_un.d_val);
+ if (string == NULL)
+ goto error_return;
+ fprintf (f, "%s", string);
+ }
+ fprintf (f, "\n");
+ }
+
+ free (dynbuf);
+ dynbuf = NULL;
}
- if (bfd_seek (abfd, i_shdr[i_ehdr.e_shstrndx].sh_offset, SEEK_SET) == -1)
+
+ if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
+ || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
{
- bfd_error = system_call_error;
- return (NULL);
+ if (! _bfd_elf_slurp_version_tables (abfd))
+ return false;
}
- if (bfd_read ((PTR) shstrtab, shstrtabsize, 1, abfd) != shstrtabsize)
+
+ if (elf_dynverdef (abfd) != 0)
{
- bfd_error = system_call_error;
- return (NULL);
+ Elf_Internal_Verdef *t;
+
+ fprintf (f, "\nVersion definitions:\n");
+ for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
+ {
+ fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
+ t->vd_flags, t->vd_hash, t->vd_nodename);
+ if (t->vd_auxptr->vda_nextptr != NULL)
+ {
+ Elf_Internal_Verdaux *a;
+
+ fprintf (f, "\t");
+ for (a = t->vd_auxptr->vda_nextptr;
+ a != NULL;
+ a = a->vda_nextptr)
+ fprintf (f, "%s ", a->vda_nodename);
+ fprintf (f, "\n");
+ }
+ }
}
-
- /* Once all of the section headers have been read and converted, we
- can start processing them. */
- for (shindex = 0; shindex < i_ehdr.e_shnum; shindex++)
+ if (elf_dynverref (abfd) != 0)
{
- bfd_section_from_shdr (abfd, i_shdr + shindex, shstrtab);
+ Elf_Internal_Verneed *t;
+
+ fprintf (f, "\nVersion References:\n");
+ for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
+ {
+ Elf_Internal_Vernaux *a;
+
+ fprintf (f, " required from %s:\n", t->vn_filename);
+ for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
+ fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
+ a->vna_flags, a->vna_other, a->vna_nodename);
+ }
}
- return (abfd->xvec);
+ return true;
+
+ error_return:
+ if (dynbuf != NULL)
+ free (dynbuf);
+ return false;
}
-static boolean
-DEFUN (elf_mkobject, (abfd), bfd *abfd)
+/* Display ELF-specific fields of a symbol. */
+
+void
+bfd_elf_print_symbol (abfd, filep, symbol, how)
+ bfd *abfd;
+ PTR filep;
+ asymbol *symbol;
+ bfd_print_symbol_type how;
{
- fprintf (stderr, "elf_mkobject unimplemented\n");
- fflush (stderr);
- abort ();
- return (false);
+ FILE *file = (FILE *) filep;
+ switch (how)
+ {
+ case bfd_print_symbol_name:
+ fprintf (file, "%s", symbol->name);
+ break;
+ case bfd_print_symbol_more:
+ fprintf (file, "elf ");
+ fprintf_vma (file, symbol->value);
+ fprintf (file, " %lx", (long) symbol->flags);
+ break;
+ case bfd_print_symbol_all:
+ {
+ CONST char *section_name;
+ section_name = symbol->section ? symbol->section->name : "(*none*)";
+ bfd_print_symbol_vandf ((PTR) file, symbol);
+ fprintf (file, " %s\t", section_name);
+ /* Print the "other" value for a symbol. For common symbols,
+ we've already printed the size; now print the alignment.
+ For other symbols, we have no specified alignment, and
+ we've printed the address; now print the size. */
+ fprintf_vma (file,
+ (bfd_is_com_section (symbol->section)
+ ? ((elf_symbol_type *) symbol)->internal_elf_sym.st_value
+ : ((elf_symbol_type *) symbol)->internal_elf_sym.st_size));
+
+ /* If we have version information, print it. */
+ if (elf_tdata (abfd)->dynversym_section != 0
+ && (elf_tdata (abfd)->dynverdef_section != 0
+ || elf_tdata (abfd)->dynverref_section != 0))
+ {
+ unsigned int vernum;
+ const char *version_string;
+
+ vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
+
+ if (vernum == 0)
+ version_string = "";
+ else if (vernum == 1)
+ version_string = "Base";
+ else if (vernum <= elf_tdata (abfd)->cverdefs)
+ version_string =
+ elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
+ else
+ {
+ Elf_Internal_Verneed *t;
+
+ version_string = "";
+ for (t = elf_tdata (abfd)->verref;
+ t != NULL;
+ t = t->vn_nextref)
+ {
+ Elf_Internal_Vernaux *a;
+
+ for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
+ {
+ if (a->vna_other == vernum)
+ {
+ version_string = a->vna_nodename;
+ break;
+ }
+ }
+ }
+ }
+
+ if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
+ fprintf (file, " %-11s", version_string);
+ else
+ {
+ int i;
+
+ fprintf (file, " (%s)", version_string);
+ for (i = 10 - strlen (version_string); i > 0; --i)
+ putc (' ', file);
+ }
+ }
+
+ /* If the st_other field is not zero, print it. */
+ if (((elf_symbol_type *) symbol)->internal_elf_sym.st_other != 0)
+ fprintf (file, " 0x%02x",
+ ((unsigned int)
+ ((elf_symbol_type *) symbol)->internal_elf_sym.st_other));
+
+ fprintf (file, " %s", symbol->name);
+ }
+ break;
+ }
}
+\f
+/* Create an entry in an ELF linker hash table. */
-static boolean
-DEFUN (elf_write_object_contents, (abfd), bfd *abfd)
+struct bfd_hash_entry *
+_bfd_elf_link_hash_newfunc (entry, table, string)
+ struct bfd_hash_entry *entry;
+ struct bfd_hash_table *table;
+ const char *string;
{
- fprintf (stderr, "elf_write_object_contents unimplemented\n");
- fflush (stderr);
- abort ();
- return (false);
+ struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
+
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (ret == (struct elf_link_hash_entry *) NULL)
+ ret = ((struct elf_link_hash_entry *)
+ bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)));
+ if (ret == (struct elf_link_hash_entry *) NULL)
+ return (struct bfd_hash_entry *) ret;
+
+ /* Call the allocation method of the superclass. */
+ ret = ((struct elf_link_hash_entry *)
+ _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
+ table, string));
+ if (ret != (struct elf_link_hash_entry *) NULL)
+ {
+ /* Set local fields. */
+ ret->indx = -1;
+ ret->size = 0;
+ ret->dynindx = -1;
+ ret->dynstr_index = 0;
+ ret->weakdef = NULL;
+ ret->got_offset = (bfd_vma) -1;
+ ret->plt_offset = (bfd_vma) -1;
+ ret->linker_section_pointer = (elf_linker_section_pointers_t *)0;
+ ret->verinfo.verdef = NULL;
+ ret->type = STT_NOTYPE;
+ ret->other = 0;
+ /* Assume that we have been called by a non-ELF symbol reader.
+ This flag is then reset by the code which reads an ELF input
+ file. This ensures that a symbol created by a non-ELF symbol
+ reader will have the flag set correctly. */
+ ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
+ }
+
+ return (struct bfd_hash_entry *) ret;
}
-static boolean
-DEFUN (elf_set_section_contents, (abfd, section, location, offset, count),
- bfd *abfd AND
- sec_ptr section AND
- PTR location AND
- file_ptr offset AND
- bfd_size_type count)
-{
- fprintf (stderr, "elf_set_section_contents unimplemented\n");
- fflush (stderr);
- abort ();
- return (false);
+/* Initialize an ELF linker hash table. */
+
+boolean
+_bfd_elf_link_hash_table_init (table, abfd, newfunc)
+ struct elf_link_hash_table *table;
+ bfd *abfd;
+ struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
+ struct bfd_hash_table *,
+ const char *));
+{
+ table->dynamic_sections_created = false;
+ table->dynobj = NULL;
+ /* The first dynamic symbol is a dummy. */
+ table->dynsymcount = 1;
+ table->dynstr = NULL;
+ table->bucketcount = 0;
+ table->needed = NULL;
+ table->hgot = NULL;
+ table->stab_info = NULL;
+ return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
}
-#define elf_new_section_hook _bfd_dummy_new_section_hook
-#define elf_core_file_failing_command _bfd_dummy_core_file_failing_command
-#define elf_core_file_failing_signal _bfd_dummy_core_file_failing_signal
-#define elf_core_file_matches_executable_p _bfd_dummy_core_file_matches_executable_p
-#define elf_slurp_armap bfd_false
-#define elf_slurp_extended_name_table _bfd_slurp_extended_name_table
-#define elf_truncate_arname bfd_dont_truncate_arname
-#define elf_openr_next_archived_file bfd_generic_openr_next_archived_file
-#define elf_generic_stat_arch_elt bfd_generic_stat_arch_elt
-#define elf_get_section_contents bfd_generic_get_section_contents
-#define elf_close_and_cleanup bfd_generic_close_and_cleanup
+/* Create an ELF linker hash table. */
-#define elf_bfd_debug_info_start bfd_void
-#define elf_bfd_debug_info_end bfd_void
-#define elf_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
+struct bfd_link_hash_table *
+_bfd_elf_link_hash_table_create (abfd)
+ bfd *abfd;
+{
+ struct elf_link_hash_table *ret;
-#define elf_write_armap bfd_false
+ ret = ((struct elf_link_hash_table *)
+ bfd_alloc (abfd, sizeof (struct elf_link_hash_table)));
+ if (ret == (struct elf_link_hash_table *) NULL)
+ return NULL;
+ if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
+ {
+ bfd_release (abfd, ret);
+ return NULL;
+ }
-static unsigned int
-elf_get_symtab_upper_bound(abfd)
-bfd *abfd;
-{
- fprintf (stderr, "elf_get_symtab_upper_bound unimplemented\n");
- fflush (stderr);
- abort ();
- return (0);
+ return &ret->root;
}
-static unsigned int
-elf_get_reloc_upper_bound (abfd, asect)
-bfd *abfd;
-sec_ptr asect;
+/* This is a hook for the ELF emulation code in the generic linker to
+ tell the backend linker what file name to use for the DT_NEEDED
+ entry for a dynamic object. The generic linker passes name as an
+ empty string to indicate that no DT_NEEDED entry should be made. */
+
+void
+bfd_elf_set_dt_needed_name (abfd, name)
+ bfd *abfd;
+ const char *name;
{
- fprintf (stderr, "elf_get_reloc_upper_bound unimplemented\n");
- fflush (stderr);
- abort ();
- return (0);
+ if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
+ && bfd_get_format (abfd) == bfd_object)
+ elf_dt_name (abfd) = name;
}
-static unsigned int
-elf_canonicalize_reloc (abfd, section, relptr, symbols)
-bfd *abfd;
-sec_ptr section;
-arelent **relptr;
-asymbol **symbols;
+/* Get the list of DT_NEEDED entries for a link. This is a hook for
+ the ELF emulation code. */
+
+struct bfd_link_needed_list *
+bfd_elf_get_needed_list (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
{
- fprintf (stderr, "elf_canonicalize_reloc unimplemented\n");
- fflush (stderr);
- abort ();
- return (0);
+ if (info->hash->creator->flavour != bfd_target_elf_flavour)
+ return NULL;
+ return elf_hash_table (info)->needed;
}
-static unsigned int
-elf_get_symtab (abfd, alocation)
-bfd *abfd;
-asymbol **alocation;
+/* Get the name actually used for a dynamic object for a link. This
+ is the SONAME entry if there is one. Otherwise, it is the string
+ passed to bfd_elf_set_dt_needed_name, or it is the filename. */
+
+const char *
+bfd_elf_get_dt_soname (abfd)
+ bfd *abfd;
{
- fprintf (stderr, "elf_get_symtab unimplemented\n");
- fflush (stderr);
- abort ();
- return (0);
+ if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
+ && bfd_get_format (abfd) == bfd_object)
+ return elf_dt_name (abfd);
+ return NULL;
}
+\f
+/* Allocate an ELF string table--force the first byte to be zero. */
-static asymbol *
-elf_make_empty_symbol(abfd)
-bfd *abfd;
+struct bfd_strtab_hash *
+_bfd_elf_stringtab_init ()
{
- fprintf (stderr, "elf_make_empty_symbol unimplemented\n");
- fflush (stderr);
- abort ();
- return (NULL);
+ struct bfd_strtab_hash *ret;
+
+ ret = _bfd_stringtab_init ();
+ if (ret != NULL)
+ {
+ bfd_size_type loc;
+
+ loc = _bfd_stringtab_add (ret, "", true, false);
+ BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
+ if (loc == (bfd_size_type) -1)
+ {
+ _bfd_stringtab_free (ret);
+ ret = NULL;
+ }
+ }
+ return ret;
}
+\f
+/* ELF .o/exec file reading */
+
+/* Create a new bfd section from an ELF section header. */
-static void
-DEFUN (elf_print_symbol,(ignore_abfd, filep, symbol, how),
- bfd *ignore_abfd AND
- PTR filep AND
- asymbol *symbol AND
- bfd_print_symbol_enum_type how)
+boolean
+bfd_section_from_shdr (abfd, shindex)
+ bfd *abfd;
+ unsigned int shindex;
{
- fprintf (stderr, "elf_print_symbol unimplemented\n");
- fflush (stderr);
- abort ();
+ Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
+ Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ char *name;
+
+ name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
+
+ switch (hdr->sh_type)
+ {
+ case SHT_NULL:
+ /* Inactive section. Throw it away. */
+ return true;
+
+ case SHT_PROGBITS: /* Normal section with contents. */
+ case SHT_DYNAMIC: /* Dynamic linking information. */
+ case SHT_NOBITS: /* .bss section. */
+ case SHT_HASH: /* .hash section. */
+ case SHT_NOTE: /* .note section. */
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+
+ case SHT_SYMTAB: /* A symbol table */
+ if (elf_onesymtab (abfd) == shindex)
+ return true;
+
+ BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
+ BFD_ASSERT (elf_onesymtab (abfd) == 0);
+ elf_onesymtab (abfd) = shindex;
+ elf_tdata (abfd)->symtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
+ abfd->flags |= HAS_SYMS;
+
+ /* Sometimes a shared object will map in the symbol table. If
+ SHF_ALLOC is set, and this is a shared object, then we also
+ treat this section as a BFD section. We can not base the
+ decision purely on SHF_ALLOC, because that flag is sometimes
+ set in a relocateable object file, which would confuse the
+ linker. */
+ if ((hdr->sh_flags & SHF_ALLOC) != 0
+ && (abfd->flags & DYNAMIC) != 0
+ && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
+ return false;
+
+ return true;
+
+ case SHT_DYNSYM: /* A dynamic symbol table */
+ if (elf_dynsymtab (abfd) == shindex)
+ return true;
+
+ BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
+ BFD_ASSERT (elf_dynsymtab (abfd) == 0);
+ elf_dynsymtab (abfd) = shindex;
+ elf_tdata (abfd)->dynsymtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
+ abfd->flags |= HAS_SYMS;
+
+ /* Besides being a symbol table, we also treat this as a regular
+ section, so that objcopy can handle it. */
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+
+ case SHT_STRTAB: /* A string table */
+ if (hdr->bfd_section != NULL)
+ return true;
+ if (ehdr->e_shstrndx == shindex)
+ {
+ elf_tdata (abfd)->shstrtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
+ return true;
+ }
+ {
+ unsigned int i;
+
+ for (i = 1; i < ehdr->e_shnum; i++)
+ {
+ Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
+ if (hdr2->sh_link == shindex)
+ {
+ if (! bfd_section_from_shdr (abfd, i))
+ return false;
+ if (elf_onesymtab (abfd) == i)
+ {
+ elf_tdata (abfd)->strtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] =
+ &elf_tdata (abfd)->strtab_hdr;
+ return true;
+ }
+ if (elf_dynsymtab (abfd) == i)
+ {
+ elf_tdata (abfd)->dynstrtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = hdr =
+ &elf_tdata (abfd)->dynstrtab_hdr;
+ /* We also treat this as a regular section, so
+ that objcopy can handle it. */
+ break;
+ }
+#if 0 /* Not handling other string tables specially right now. */
+ hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
+ /* We have a strtab for some random other section. */
+ newsect = (asection *) hdr2->bfd_section;
+ if (!newsect)
+ break;
+ hdr->bfd_section = newsect;
+ hdr2 = &elf_section_data (newsect)->str_hdr;
+ *hdr2 = *hdr;
+ elf_elfsections (abfd)[shindex] = hdr2;
+#endif
+ }
+ }
+ }
+
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+
+ case SHT_REL:
+ case SHT_RELA:
+ /* *These* do a lot of work -- but build no sections! */
+ {
+ asection *target_sect;
+ Elf_Internal_Shdr *hdr2;
+
+ /* For some incomprehensible reason Oracle distributes
+ libraries for Solaris in which some of the objects have
+ bogus sh_link fields. It would be nice if we could just
+ reject them, but, unfortunately, some people need to use
+ them. We scan through the section headers; if we find only
+ one suitable symbol table, we clobber the sh_link to point
+ to it. I hope this doesn't break anything. */
+ if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
+ && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
+ {
+ int scan;
+ int found;
+
+ found = 0;
+ for (scan = 1; scan < ehdr->e_shnum; scan++)
+ {
+ if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
+ || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
+ {
+ if (found != 0)
+ {
+ found = 0;
+ break;
+ }
+ found = scan;
+ }
+ }
+ if (found != 0)
+ hdr->sh_link = found;
+ }
+
+ /* Get the symbol table. */
+ if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
+ && ! bfd_section_from_shdr (abfd, hdr->sh_link))
+ return false;
+
+ /* If this reloc section does not use the main symbol table we
+ don't treat it as a reloc section. BFD can't adequately
+ represent such a section, so at least for now, we don't
+ try. We just present it as a normal section. */
+ if (hdr->sh_link != elf_onesymtab (abfd))
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+
+ if (! bfd_section_from_shdr (abfd, hdr->sh_info))
+ return false;
+ target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
+ if (target_sect == NULL)
+ return false;
+
+ if ((target_sect->flags & SEC_RELOC) == 0
+ || target_sect->reloc_count == 0)
+ hdr2 = &elf_section_data (target_sect)->rel_hdr;
+ else
+ {
+ BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
+ hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
+ elf_section_data (target_sect)->rel_hdr2 = hdr2;
+ }
+ *hdr2 = *hdr;
+ elf_elfsections (abfd)[shindex] = hdr2;
+ target_sect->reloc_count += hdr->sh_size / hdr->sh_entsize;
+ target_sect->flags |= SEC_RELOC;
+ target_sect->relocation = NULL;
+ target_sect->rel_filepos = hdr->sh_offset;
+ abfd->flags |= HAS_RELOC;
+ return true;
+ }
+ break;
+
+ case SHT_GNU_verdef:
+ elf_dynverdef (abfd) = shindex;
+ elf_tdata (abfd)->dynverdef_hdr = *hdr;
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+ break;
+
+ case SHT_GNU_versym:
+ elf_dynversym (abfd) = shindex;
+ elf_tdata (abfd)->dynversym_hdr = *hdr;
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+ break;
+
+ case SHT_GNU_verneed:
+ elf_dynverref (abfd) = shindex;
+ elf_tdata (abfd)->dynverref_hdr = *hdr;
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+ break;
+
+ case SHT_SHLIB:
+ return true;
+
+ default:
+ /* Check for any processor-specific section types. */
+ {
+ if (bed->elf_backend_section_from_shdr)
+ (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
+ }
+ break;
+ }
+
+ return true;
}
-static alent *
-DEFUN (elf_get_lineno,(ignore_abfd, symbol),
- bfd *ignore_abfd AND
- asymbol *symbol)
+/* Given an ELF section number, retrieve the corresponding BFD
+ section. */
+
+asection *
+bfd_section_from_elf_index (abfd, index)
+ bfd *abfd;
+ unsigned int index;
{
- fprintf (stderr, "elf_get_lineno unimplemented\n");
- fflush (stderr);
- abort ();
- return (NULL);
+ BFD_ASSERT (index > 0 && index < SHN_LORESERVE);
+ if (index >= elf_elfheader (abfd)->e_shnum)
+ return NULL;
+ return elf_elfsections (abfd)[index]->bfd_section;
}
-static boolean
-DEFUN (elf_set_arch_mach,(abfd, arch, machine),
- bfd *abfd AND
- enum bfd_architecture arch AND
- unsigned long machine)
+boolean
+_bfd_elf_new_section_hook (abfd, sec)
+ bfd *abfd;
+ asection *sec;
{
- fprintf (stderr, "elf_set_arch_mach unimplemented\n");
- fflush (stderr);
- /* Allow any architecture to be supported by the elf backend */
- return bfd_default_set_arch_mach(abfd, arch, machine);
+ struct bfd_elf_section_data *sdata;
+
+ sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata));
+ if (!sdata)
+ return false;
+ sec->used_by_bfd = (PTR) sdata;
+ memset (sdata, 0, sizeof (*sdata));
+ return true;
}
-static boolean
-DEFUN (elf_find_nearest_line,(abfd,
- section,
- symbols,
- offset,
- filename_ptr,
- functionname_ptr,
- line_ptr),
- bfd *abfd AND
- asection *section AND
- asymbol **symbols AND
- bfd_vma offset AND
- CONST char **filename_ptr AND
- CONST char **functionname_ptr AND
- unsigned int *line_ptr)
-{
- fprintf (stderr, "elf_find_nearest_line unimplemented\n");
- fflush (stderr);
- abort ();
- return (false);
+/* Create a new bfd section from an ELF program header.
+
+ Since program segments have no names, we generate a synthetic name
+ of the form segment<NUM>, where NUM is generally the index in the
+ program header table. For segments that are split (see below) we
+ generate the names segment<NUM>a and segment<NUM>b.
+
+ Note that some program segments may have a file size that is different than
+ (less than) the memory size. All this means is that at execution the
+ system must allocate the amount of memory specified by the memory size,
+ but only initialize it with the first "file size" bytes read from the
+ file. This would occur for example, with program segments consisting
+ of combined data+bss.
+
+ To handle the above situation, this routine generates TWO bfd sections
+ for the single program segment. The first has the length specified by
+ the file size of the segment, and the second has the length specified
+ by the difference between the two sizes. In effect, the segment is split
+ into it's initialized and uninitialized parts.
+
+ */
+
+boolean
+bfd_section_from_phdr (abfd, hdr, index)
+ bfd *abfd;
+ Elf_Internal_Phdr *hdr;
+ int index;
+{
+ asection *newsect;
+ char *name;
+ char namebuf[64];
+ int split;
+
+ split = ((hdr->p_memsz > 0) &&
+ (hdr->p_filesz > 0) &&
+ (hdr->p_memsz > hdr->p_filesz));
+ sprintf (namebuf, split ? "segment%da" : "segment%d", index);
+ name = bfd_alloc (abfd, strlen (namebuf) + 1);
+ if (!name)
+ return false;
+ strcpy (name, namebuf);
+ newsect = bfd_make_section (abfd, name);
+ if (newsect == NULL)
+ return false;
+ newsect->vma = hdr->p_vaddr;
+ newsect->lma = hdr->p_paddr;
+ newsect->_raw_size = hdr->p_filesz;
+ newsect->filepos = hdr->p_offset;
+ newsect->flags |= SEC_HAS_CONTENTS;
+ if (hdr->p_type == PT_LOAD)
+ {
+ newsect->flags |= SEC_ALLOC;
+ newsect->flags |= SEC_LOAD;
+ if (hdr->p_flags & PF_X)
+ {
+ /* FIXME: all we known is that it has execute PERMISSION,
+ may be data. */
+ newsect->flags |= SEC_CODE;
+ }
+ }
+ if (!(hdr->p_flags & PF_W))
+ {
+ newsect->flags |= SEC_READONLY;
+ }
+
+ if (split)
+ {
+ sprintf (namebuf, "segment%db", index);
+ name = bfd_alloc (abfd, strlen (namebuf) + 1);
+ if (!name)
+ return false;
+ strcpy (name, namebuf);
+ newsect = bfd_make_section (abfd, name);
+ if (newsect == NULL)
+ return false;
+ newsect->vma = hdr->p_vaddr + hdr->p_filesz;
+ newsect->lma = hdr->p_paddr + hdr->p_filesz;
+ newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
+ if (hdr->p_type == PT_LOAD)
+ {
+ newsect->flags |= SEC_ALLOC;
+ if (hdr->p_flags & PF_X)
+ newsect->flags |= SEC_CODE;
+ }
+ if (!(hdr->p_flags & PF_W))
+ newsect->flags |= SEC_READONLY;
+ }
+
+ return true;
}
-static int
-DEFUN (elf_sizeof_headers, (abfd, reloc),
- bfd *abfd AND
- boolean reloc)
+/* Set up an ELF internal section header for a section. */
+
+/*ARGSUSED*/
+static void
+elf_fake_sections (abfd, asect, failedptrarg)
+ bfd *abfd;
+ asection *asect;
+ PTR failedptrarg;
{
- fprintf (stderr, "elf_sizeof_headers unimplemented\n");
- fflush (stderr);
- abort ();
- return (0);
-}
-
-/* This structure contains everything that BFD knows about a target.
- It includes things like its byte order, name, what routines to call
- to do various operations, etc. Every BFD points to a target structure
- with its "xvec" member.
-
- There are two such structures here: one for big-endian machines and
- one for little-endian machines. */
-
-bfd_target elf_big_vec =
-{
- /* name: identify kind of target */
- "elf-big",
-
- /* flavour: general indication about file */
- bfd_target_elf_flavour_enum,
-
- /* byteorder_big_p: data is big endian */
- true,
-
- /* header_byteorder_big_p: header is also big endian */
- true,
-
- /* object_flags: mask of all file flags */
- (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
- DYNAMIC | WP_TEXT),
-
- /* section_flags: mask of all section flags */
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
- SEC_DATA),
-
- /* ar_pad_char: pad character for filenames within an archive header
- FIXME: this really has nothing to do with ELF, this is a characteristic
- of the archiver and/or os and should be independently tunable */
- '/',
-
- /* ar_max_namelen: maximum number of characters in an archive header
- FIXME: this really has nothing to do with ELF, this is a characteristic
- of the archiver and should be independently tunable. This value is
- a WAG (wild a** guess) */
- 15,
-
- /* align_power_min: minimum alignment restriction for any section
- FIXME: this value may be target machine dependent */
- 3,
-
- /* Routines to byte-swap various sized integers from the data sections */
- _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16,
-
- /* Routines to byte-swap various sized integers from the file headers */
- _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16,
-
- /* bfd_check_format: check the format of a file being read */
- { _bfd_dummy_target,
- elf_object_p,
- bfd_generic_archive_p,
- _bfd_dummy_target
- },
-
- /* bfd_set_format: set the format of a file being written */
- { bfd_false,
- elf_mkobject,
- _bfd_generic_mkarchive,
- bfd_false
- },
-
- /* bfd_write_contents: write cached information into a file being written */
- { bfd_false,
- elf_write_object_contents,
- _bfd_write_archive_contents,
- bfd_false
- },
-
- /* Initialize a jump table with the standard macro. All names start
- with "elf" */
- JUMP_TABLE(elf),
-
- /* SWAP_TABLE */
- NULL, NULL, NULL
-};
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ boolean *failedptr = (boolean *) failedptrarg;
+ Elf_Internal_Shdr *this_hdr;
-bfd_target elf_little_vec =
-{
- /* name: identify kind of target */
- "elf-little",
-
- /* flavour: general indication about file */
- bfd_target_elf_flavour_enum,
-
- /* byteorder_big_p: data is big endian */
- false, /* Nope -- this one's little endian */
-
- /* header_byteorder_big_p: header is also big endian */
- false, /* Nope -- this one's little endian */
-
- /* object_flags: mask of all file flags */
- (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
- DYNAMIC | WP_TEXT),
-
- /* section_flags: mask of all section flags */
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
- SEC_DATA),
-
- /* ar_pad_char: pad character for filenames within an archive header
- FIXME: this really has nothing to do with ELF, this is a characteristic
- of the archiver and/or os and should be independently tunable */
- '/',
-
- /* ar_max_namelen: maximum number of characters in an archive header
- FIXME: this really has nothing to do with ELF, this is a characteristic
- of the archiver and should be independently tunable. This value is
- a WAG (wild a** guess) */
- 15,
-
- /* align_power_min: minimum alignment restriction for any section
- FIXME: this value may be target machine dependent */
- 3,
-
- /* Routines to byte-swap various sized integers from the data sections */
- _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16,
-
- /* Routines to byte-swap various sized integers from the file headers */
- _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16,
-
- /* bfd_check_format: check the format of a file being read */
- { _bfd_dummy_target,
- elf_object_p,
- bfd_generic_archive_p,
- _bfd_dummy_target
- },
-
- /* bfd_set_format: set the format of a file being written */
- { bfd_false,
- elf_mkobject,
- _bfd_generic_mkarchive,
- bfd_false
- },
-
- /* bfd_write_contents: write cached information into a file being written */
- { bfd_false,
- elf_write_object_contents,
- _bfd_write_archive_contents,
- bfd_false
- },
-
- /* Initialize a jump table with the standard macro. All names start
- with "elf" */
- JUMP_TABLE(elf),
-
- /* SWAP_TABLE */
- NULL, NULL, NULL
-};
+ if (*failedptr)
+ {
+ /* We already failed; just get out of the bfd_map_over_sections
+ loop. */
+ return;
+ }
+
+ this_hdr = &elf_section_data (asect)->this_hdr;
+
+ this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd),
+ asect->name,
+ true, false);
+ if (this_hdr->sh_name == (unsigned long) -1)
+ {
+ *failedptr = true;
+ return;
+ }
+
+ this_hdr->sh_flags = 0;
+
+ if ((asect->flags & SEC_ALLOC) != 0
+ || asect->user_set_vma)
+ this_hdr->sh_addr = asect->vma;
+ else
+ this_hdr->sh_addr = 0;
+
+ this_hdr->sh_offset = 0;
+ this_hdr->sh_size = asect->_raw_size;
+ this_hdr->sh_link = 0;
+ this_hdr->sh_addralign = 1 << asect->alignment_power;
+ /* The sh_entsize and sh_info fields may have been set already by
+ copy_private_section_data. */
+
+ this_hdr->bfd_section = asect;
+ this_hdr->contents = NULL;
+
+ /* FIXME: This should not be based on section names. */
+ if (strcmp (asect->name, ".dynstr") == 0)
+ this_hdr->sh_type = SHT_STRTAB;
+ else if (strcmp (asect->name, ".hash") == 0)
+ {
+ this_hdr->sh_type = SHT_HASH;
+ this_hdr->sh_entsize = bed->s->arch_size / 8;
+ }
+ else if (strcmp (asect->name, ".dynsym") == 0)
+ {
+ this_hdr->sh_type = SHT_DYNSYM;
+ this_hdr->sh_entsize = bed->s->sizeof_sym;
+ }
+ else if (strcmp (asect->name, ".dynamic") == 0)
+ {
+ this_hdr->sh_type = SHT_DYNAMIC;
+ this_hdr->sh_entsize = bed->s->sizeof_dyn;
+ }
+ else if (strncmp (asect->name, ".rela", 5) == 0
+ && get_elf_backend_data (abfd)->use_rela_p)
+ {
+ this_hdr->sh_type = SHT_RELA;
+ this_hdr->sh_entsize = bed->s->sizeof_rela;
+ }
+ else if (strncmp (asect->name, ".rel", 4) == 0
+ && ! get_elf_backend_data (abfd)->use_rela_p)
+ {
+ this_hdr->sh_type = SHT_REL;
+ this_hdr->sh_entsize = bed->s->sizeof_rel;
+ }
+ else if (strncmp (asect->name, ".note", 5) == 0)
+ this_hdr->sh_type = SHT_NOTE;
+ else if (strncmp (asect->name, ".stab", 5) == 0
+ && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
+ this_hdr->sh_type = SHT_STRTAB;
+ else if (strcmp (asect->name, ".gnu.version") == 0)
+ {
+ this_hdr->sh_type = SHT_GNU_versym;
+ this_hdr->sh_entsize = sizeof (Elf_External_Versym);
+ }
+ else if (strcmp (asect->name, ".gnu.version_d") == 0)
+ {
+ this_hdr->sh_type = SHT_GNU_verdef;
+ this_hdr->sh_entsize = 0;
+ /* objcopy or strip will copy over sh_info, but may not set
+ cverdefs. The linker will set cverdefs, but sh_info will be
+ zero. */
+ if (this_hdr->sh_info == 0)
+ this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
+ else
+ BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
+ || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
+ }
+ else if (strcmp (asect->name, ".gnu.version_r") == 0)
+ {
+ this_hdr->sh_type = SHT_GNU_verneed;
+ this_hdr->sh_entsize = 0;
+ /* objcopy or strip will copy over sh_info, but may not set
+ cverrefs. The linker will set cverrefs, but sh_info will be
+ zero. */
+ if (this_hdr->sh_info == 0)
+ this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
+ else
+ BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
+ || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
+ }
+ else if ((asect->flags & SEC_ALLOC) != 0
+ && (asect->flags & SEC_LOAD) != 0)
+ this_hdr->sh_type = SHT_PROGBITS;
+ else if ((asect->flags & SEC_ALLOC) != 0
+ && ((asect->flags & SEC_LOAD) == 0))
+ this_hdr->sh_type = SHT_NOBITS;
+ else
+ {
+ /* Who knows? */
+ this_hdr->sh_type = SHT_PROGBITS;
+ }
+
+ if ((asect->flags & SEC_ALLOC) != 0)
+ this_hdr->sh_flags |= SHF_ALLOC;
+ if ((asect->flags & SEC_READONLY) == 0)
+ this_hdr->sh_flags |= SHF_WRITE;
+ if ((asect->flags & SEC_CODE) != 0)
+ this_hdr->sh_flags |= SHF_EXECINSTR;
+
+ /* Check for processor-specific section types. */
+ {
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ if (bed->elf_backend_fake_sections)
+ (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
+ }
+
+ /* If the section has relocs, set up a section header for the
+ SHT_REL[A] section. */
+ if ((asect->flags & SEC_RELOC) != 0)
+ {
+ Elf_Internal_Shdr *rela_hdr;
+ int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
+ char *name;
+
+ rela_hdr = &elf_section_data (asect)->rel_hdr;
+ name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name));
+ if (name == NULL)
+ {
+ *failedptr = true;
+ return;
+ }
+ sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
+ rela_hdr->sh_name =
+ (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name,
+ true, false);
+ if (rela_hdr->sh_name == (unsigned int) -1)
+ {
+ *failedptr = true;
+ return;
+ }
+ rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
+ rela_hdr->sh_entsize = (use_rela_p
+ ? bed->s->sizeof_rela
+ : bed->s->sizeof_rel);
+ rela_hdr->sh_addralign = bed->s->file_align;
+ rela_hdr->sh_flags = 0;
+ rela_hdr->sh_addr = 0;
+ rela_hdr->sh_size = 0;
+ rela_hdr->sh_offset = 0;
+ }
+}
+
+/* Assign all ELF section numbers. The dummy first section is handled here
+ too. The link/info pointers for the standard section types are filled
+ in here too, while we're at it. */
+
+static boolean
+assign_section_numbers (abfd)
+ bfd *abfd;
+{
+ struct elf_obj_tdata *t = elf_tdata (abfd);
+ asection *sec;
+ unsigned int section_number;
+ Elf_Internal_Shdr **i_shdrp;
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ section_number = 1;
+
+ for (sec = abfd->sections; sec; sec = sec->next)
+ {
+ struct bfd_elf_section_data *d = elf_section_data (sec);
+
+ d->this_idx = section_number++;
+ if ((sec->flags & SEC_RELOC) == 0)
+ d->rel_idx = 0;
+ else
+ d->rel_idx = section_number++;
+ }
+
+ t->shstrtab_section = section_number++;
+ elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
+ t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
+
+ if (abfd->symcount > 0)
+ {
+ t->symtab_section = section_number++;
+ t->strtab_section = section_number++;
+ }
+
+ elf_elfheader (abfd)->e_shnum = section_number;
+
+ /* Set up the list of section header pointers, in agreement with the
+ indices. */
+ i_shdrp = ((Elf_Internal_Shdr **)
+ bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)));
+ if (i_shdrp == NULL)
+ return false;
+
+ i_shdrp[0] = ((Elf_Internal_Shdr *)
+ bfd_alloc (abfd, sizeof (Elf_Internal_Shdr)));
+ if (i_shdrp[0] == NULL)
+ {
+ bfd_release (abfd, i_shdrp);
+ return false;
+ }
+ memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
+
+ elf_elfsections (abfd) = i_shdrp;
+
+ i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
+ if (abfd->symcount > 0)
+ {
+ i_shdrp[t->symtab_section] = &t->symtab_hdr;
+ i_shdrp[t->strtab_section] = &t->strtab_hdr;
+ t->symtab_hdr.sh_link = t->strtab_section;
+ }
+ for (sec = abfd->sections; sec; sec = sec->next)
+ {
+ struct bfd_elf_section_data *d = elf_section_data (sec);
+ asection *s;
+ const char *name;
+
+ i_shdrp[d->this_idx] = &d->this_hdr;
+ if (d->rel_idx != 0)
+ i_shdrp[d->rel_idx] = &d->rel_hdr;
+
+ /* Fill in the sh_link and sh_info fields while we're at it. */
+
+ /* sh_link of a reloc section is the section index of the symbol
+ table. sh_info is the section index of the section to which
+ the relocation entries apply. */
+ if (d->rel_idx != 0)
+ {
+ d->rel_hdr.sh_link = t->symtab_section;
+ d->rel_hdr.sh_info = d->this_idx;
+ }
+
+ switch (d->this_hdr.sh_type)
+ {
+ case SHT_REL:
+ case SHT_RELA:
+ /* A reloc section which we are treating as a normal BFD
+ section. sh_link is the section index of the symbol
+ table. sh_info is the section index of the section to
+ which the relocation entries apply. We assume that an
+ allocated reloc section uses the dynamic symbol table.
+ FIXME: How can we be sure? */
+ s = bfd_get_section_by_name (abfd, ".dynsym");
+ if (s != NULL)
+ d->this_hdr.sh_link = elf_section_data (s)->this_idx;
+
+ /* We look up the section the relocs apply to by name. */
+ name = sec->name;
+ if (d->this_hdr.sh_type == SHT_REL)
+ name += 4;
+ else
+ name += 5;
+ s = bfd_get_section_by_name (abfd, name);
+ if (s != NULL)
+ d->this_hdr.sh_info = elf_section_data (s)->this_idx;
+ break;
+
+ case SHT_STRTAB:
+ /* We assume that a section named .stab*str is a stabs
+ string section. We look for a section with the same name
+ but without the trailing ``str'', and set its sh_link
+ field to point to this section. */
+ if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
+ && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
+ {
+ size_t len;
+ char *alc;
+
+ len = strlen (sec->name);
+ alc = (char *) bfd_malloc (len - 2);
+ if (alc == NULL)
+ return false;
+ strncpy (alc, sec->name, len - 3);
+ alc[len - 3] = '\0';
+ s = bfd_get_section_by_name (abfd, alc);
+ free (alc);
+ if (s != NULL)
+ {
+ elf_section_data (s)->this_hdr.sh_link = d->this_idx;
+
+ /* This is a .stab section. */
+ elf_section_data (s)->this_hdr.sh_entsize =
+ 4 + 2 * (bed->s->arch_size / 8);
+ }
+ }
+ break;
+
+ case SHT_DYNAMIC:
+ case SHT_DYNSYM:
+ case SHT_GNU_verneed:
+ case SHT_GNU_verdef:
+ /* sh_link is the section header index of the string table
+ used for the dynamic entries, or the symbol table, or the
+ version strings. */
+ s = bfd_get_section_by_name (abfd, ".dynstr");
+ if (s != NULL)
+ d->this_hdr.sh_link = elf_section_data (s)->this_idx;
+ break;
+
+ case SHT_HASH:
+ case SHT_GNU_versym:
+ /* sh_link is the section header index of the symbol table
+ this hash table or version table is for. */
+ s = bfd_get_section_by_name (abfd, ".dynsym");
+ if (s != NULL)
+ d->this_hdr.sh_link = elf_section_data (s)->this_idx;
+ break;
+ }
+ }
+
+ return true;
+}
+
+/* Map symbol from it's internal number to the external number, moving
+ all local symbols to be at the head of the list. */
+
+static INLINE int
+sym_is_global (abfd, sym)
+ bfd *abfd;
+ asymbol *sym;
+{
+ /* If the backend has a special mapping, use it. */
+ if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
+ return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
+ (abfd, sym));
+
+ return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
+ || bfd_is_und_section (bfd_get_section (sym))
+ || bfd_is_com_section (bfd_get_section (sym)));
+}
+
+static boolean
+elf_map_symbols (abfd)
+ bfd *abfd;
+{
+ int symcount = bfd_get_symcount (abfd);
+ asymbol **syms = bfd_get_outsymbols (abfd);
+ asymbol **sect_syms;
+ int num_locals = 0;
+ int num_globals = 0;
+ int num_locals2 = 0;
+ int num_globals2 = 0;
+ int max_index = 0;
+ int num_sections = 0;
+ int idx;
+ asection *asect;
+ asymbol **new_syms;
+
+#ifdef DEBUG
+ fprintf (stderr, "elf_map_symbols\n");
+ fflush (stderr);
+#endif
+
+ /* Add a section symbol for each BFD section. FIXME: Is this really
+ necessary? */
+ for (asect = abfd->sections; asect; asect = asect->next)
+ {
+ if (max_index < asect->index)
+ max_index = asect->index;
+ }
+
+ max_index++;
+ sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
+ if (sect_syms == NULL)
+ return false;
+ elf_section_syms (abfd) = sect_syms;
+
+ for (idx = 0; idx < symcount; idx++)
+ {
+ if ((syms[idx]->flags & BSF_SECTION_SYM) != 0
+ && (syms[idx]->value + syms[idx]->section->vma) == 0)
+ {
+ asection *sec;
+
+ sec = syms[idx]->section;
+ if (sec->owner != NULL)
+ {
+ if (sec->owner != abfd)
+ {
+ if (sec->output_offset != 0)
+ continue;
+ sec = sec->output_section;
+ BFD_ASSERT (sec->owner == abfd);
+ }
+ sect_syms[sec->index] = syms[idx];
+ }
+ }
+ }
+
+ for (asect = abfd->sections; asect; asect = asect->next)
+ {
+ asymbol *sym;
+
+ if (sect_syms[asect->index] != NULL)
+ continue;
+
+ sym = bfd_make_empty_symbol (abfd);
+ if (sym == NULL)
+ return false;
+ sym->the_bfd = abfd;
+ sym->name = asect->name;
+ sym->value = 0;
+ /* Set the flags to 0 to indicate that this one was newly added. */
+ sym->flags = 0;
+ sym->section = asect;
+ sect_syms[asect->index] = sym;
+ num_sections++;
+#ifdef DEBUG
+ fprintf (stderr,
+ "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n",
+ asect->name, (long) asect->vma, asect->index, (long) asect);
+#endif
+ }
+
+ /* Classify all of the symbols. */
+ for (idx = 0; idx < symcount; idx++)
+ {
+ if (!sym_is_global (abfd, syms[idx]))
+ num_locals++;
+ else
+ num_globals++;
+ }
+ for (asect = abfd->sections; asect; asect = asect->next)
+ {
+ if (sect_syms[asect->index] != NULL
+ && sect_syms[asect->index]->flags == 0)
+ {
+ sect_syms[asect->index]->flags = BSF_SECTION_SYM;
+ if (!sym_is_global (abfd, sect_syms[asect->index]))
+ num_locals++;
+ else
+ num_globals++;
+ sect_syms[asect->index]->flags = 0;
+ }
+ }
+
+ /* Now sort the symbols so the local symbols are first. */
+ new_syms = ((asymbol **)
+ bfd_alloc (abfd,
+ (num_locals + num_globals) * sizeof (asymbol *)));
+ if (new_syms == NULL)
+ return false;
+
+ for (idx = 0; idx < symcount; idx++)
+ {
+ asymbol *sym = syms[idx];
+ int i;
+
+ if (!sym_is_global (abfd, sym))
+ i = num_locals2++;
+ else
+ i = num_locals + num_globals2++;
+ new_syms[i] = sym;
+ sym->udata.i = i + 1;
+ }
+ for (asect = abfd->sections; asect; asect = asect->next)
+ {
+ if (sect_syms[asect->index] != NULL
+ && sect_syms[asect->index]->flags == 0)
+ {
+ asymbol *sym = sect_syms[asect->index];
+ int i;
+
+ sym->flags = BSF_SECTION_SYM;
+ if (!sym_is_global (abfd, sym))
+ i = num_locals2++;
+ else
+ i = num_locals + num_globals2++;
+ new_syms[i] = sym;
+ sym->udata.i = i + 1;
+ }
+ }
+
+ bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
+
+ elf_num_locals (abfd) = num_locals;
+ elf_num_globals (abfd) = num_globals;
+ return true;
+}
+
+/* Align to the maximum file alignment that could be required for any
+ ELF data structure. */
+
+static INLINE file_ptr align_file_position PARAMS ((file_ptr, int));
+static INLINE file_ptr
+align_file_position (off, align)
+ file_ptr off;
+ int align;
+{
+ return (off + align - 1) & ~(align - 1);
+}
+
+/* Assign a file position to a section, optionally aligning to the
+ required section alignment. */
+
+INLINE file_ptr
+_bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
+ Elf_Internal_Shdr *i_shdrp;
+ file_ptr offset;
+ boolean align;
+{
+ if (align)
+ {
+ unsigned int al;
+
+ al = i_shdrp->sh_addralign;
+ if (al > 1)
+ offset = BFD_ALIGN (offset, al);
+ }
+ i_shdrp->sh_offset = offset;
+ if (i_shdrp->bfd_section != NULL)
+ i_shdrp->bfd_section->filepos = offset;
+ if (i_shdrp->sh_type != SHT_NOBITS)
+ offset += i_shdrp->sh_size;
+ return offset;
+}
+
+/* Compute the file positions we are going to put the sections at, and
+ otherwise prepare to begin writing out the ELF file. If LINK_INFO
+ is not NULL, this is being called by the ELF backend linker. */
+
+boolean
+_bfd_elf_compute_section_file_positions (abfd, link_info)
+ bfd *abfd;
+ struct bfd_link_info *link_info;
+{
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ boolean failed;
+ struct bfd_strtab_hash *strtab;
+ Elf_Internal_Shdr *shstrtab_hdr;
+
+ if (abfd->output_has_begun)
+ return true;
+
+ /* Do any elf backend specific processing first. */
+ if (bed->elf_backend_begin_write_processing)
+ (*bed->elf_backend_begin_write_processing) (abfd, link_info);
+
+ if (! prep_headers (abfd))
+ return false;
+
+ failed = false;
+ bfd_map_over_sections (abfd, elf_fake_sections, &failed);
+ if (failed)
+ return false;
+
+ if (!assign_section_numbers (abfd))
+ return false;
+
+ /* The backend linker builds symbol table information itself. */
+ if (link_info == NULL && abfd->symcount > 0)
+ {
+ if (! swap_out_syms (abfd, &strtab))
+ return false;
+ }
+
+ shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
+ /* sh_name was set in prep_headers. */
+ shstrtab_hdr->sh_type = SHT_STRTAB;
+ shstrtab_hdr->sh_flags = 0;
+ shstrtab_hdr->sh_addr = 0;
+ shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
+ shstrtab_hdr->sh_entsize = 0;
+ shstrtab_hdr->sh_link = 0;
+ shstrtab_hdr->sh_info = 0;
+ /* sh_offset is set in assign_file_positions_except_relocs. */
+ shstrtab_hdr->sh_addralign = 1;
+
+ if (!assign_file_positions_except_relocs (abfd))
+ return false;
+
+ if (link_info == NULL && abfd->symcount > 0)
+ {
+ file_ptr off;
+ Elf_Internal_Shdr *hdr;
+
+ off = elf_tdata (abfd)->next_file_pos;
+
+ hdr = &elf_tdata (abfd)->symtab_hdr;
+ off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
+
+ hdr = &elf_tdata (abfd)->strtab_hdr;
+ off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
+
+ elf_tdata (abfd)->next_file_pos = off;
+
+ /* Now that we know where the .strtab section goes, write it
+ out. */
+ if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
+ || ! _bfd_stringtab_emit (abfd, strtab))
+ return false;
+ _bfd_stringtab_free (strtab);
+ }
+
+ abfd->output_has_begun = true;
+
+ return true;
+}
+
+/* Create a mapping from a set of sections to a program segment. */
+
+static INLINE struct elf_segment_map *
+make_mapping (abfd, sections, from, to, phdr)
+ bfd *abfd;
+ asection **sections;
+ unsigned int from;
+ unsigned int to;
+ boolean phdr;
+{
+ struct elf_segment_map *m;
+ unsigned int i;
+ asection **hdrpp;
+
+ m = ((struct elf_segment_map *)
+ bfd_zalloc (abfd,
+ (sizeof (struct elf_segment_map)
+ + (to - from - 1) * sizeof (asection *))));
+ if (m == NULL)
+ return NULL;
+ m->next = NULL;
+ m->p_type = PT_LOAD;
+ for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
+ m->sections[i - from] = *hdrpp;
+ m->count = to - from;
+
+ if (from == 0 && phdr)
+ {
+ /* Include the headers in the first PT_LOAD segment. */
+ m->includes_filehdr = 1;
+ m->includes_phdrs = 1;
+ }
+
+ return m;
+}
+
+/* Set up a mapping from BFD sections to program segments. */
+
+static boolean
+map_sections_to_segments (abfd)
+ bfd *abfd;
+{
+ asection **sections = NULL;
+ asection *s;
+ unsigned int i;
+ unsigned int count;
+ struct elf_segment_map *mfirst;
+ struct elf_segment_map **pm;
+ struct elf_segment_map *m;
+ asection *last_hdr;
+ unsigned int phdr_index;
+ bfd_vma maxpagesize;
+ asection **hdrpp;
+ boolean phdr_in_section = true;
+ boolean writable;
+ asection *dynsec;
+
+ if (elf_tdata (abfd)->segment_map != NULL)
+ return true;
+
+ if (bfd_count_sections (abfd) == 0)
+ return true;
+
+ /* Select the allocated sections, and sort them. */
+
+ sections = (asection **) bfd_malloc (bfd_count_sections (abfd)
+ * sizeof (asection *));
+ if (sections == NULL)
+ goto error_return;
+
+ i = 0;
+ for (s = abfd->sections; s != NULL; s = s->next)
+ {
+ if ((s->flags & SEC_ALLOC) != 0)
+ {
+ sections[i] = s;
+ ++i;
+ }
+ }
+ BFD_ASSERT (i <= bfd_count_sections (abfd));
+ count = i;
+
+ qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
+
+ /* Build the mapping. */
+
+ mfirst = NULL;
+ pm = &mfirst;
+
+ /* If we have a .interp section, then create a PT_PHDR segment for
+ the program headers and a PT_INTERP segment for the .interp
+ section. */
+ s = bfd_get_section_by_name (abfd, ".interp");
+ if (s != NULL && (s->flags & SEC_LOAD) != 0)
+ {
+ m = ((struct elf_segment_map *)
+ bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
+ if (m == NULL)
+ goto error_return;
+ m->next = NULL;
+ m->p_type = PT_PHDR;
+ /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
+ m->p_flags = PF_R | PF_X;
+ m->p_flags_valid = 1;
+ m->includes_phdrs = 1;
+
+ *pm = m;
+ pm = &m->next;
+
+ m = ((struct elf_segment_map *)
+ bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
+ if (m == NULL)
+ goto error_return;
+ m->next = NULL;
+ m->p_type = PT_INTERP;
+ m->count = 1;
+ m->sections[0] = s;
+
+ *pm = m;
+ pm = &m->next;
+ }
+
+ /* Look through the sections. We put sections in the same program
+ segment when the start of the second section can be placed within
+ a few bytes of the end of the first section. */
+ last_hdr = NULL;
+ phdr_index = 0;
+ maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
+ writable = false;
+ dynsec = bfd_get_section_by_name (abfd, ".dynamic");
+ if (dynsec != NULL
+ && (dynsec->flags & SEC_LOAD) == 0)
+ dynsec = NULL;
+
+ /* Deal with -Ttext or something similar such that the first section
+ is not adjacent to the program headers. This is an
+ approximation, since at this point we don't know exactly how many
+ program headers we will need. */
+ if (count > 0)
+ {
+ bfd_size_type phdr_size;
+
+ phdr_size = elf_tdata (abfd)->program_header_size;
+ if (phdr_size == 0)
+ phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
+ if ((abfd->flags & D_PAGED) == 0
+ || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
+ phdr_in_section = false;
+ }
+
+ for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
+ {
+ asection *hdr;
+ boolean new_segment;
+
+ hdr = *hdrpp;
+
+ /* See if this section and the last one will fit in the same
+ segment. */
+
+ if (last_hdr == NULL)
+ {
+ /* If we don't have a segment yet, then we don't need a new
+ one (we build the last one after this loop). */
+ new_segment = false;
+ }
+ else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
+ {
+ /* If this section has a different relation between the
+ virtual address and the load address, then we need a new
+ segment. */
+ new_segment = true;
+ }
+ else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
+ < hdr->lma)
+ {
+ /* If putting this section in this segment would force us to
+ skip a page in the segment, then we need a new segment. */
+ new_segment = true;
+ }
+ else if ((abfd->flags & D_PAGED) == 0)
+ {
+ /* If the file is not demand paged, which means that we
+ don't require the sections to be correctly aligned in the
+ file, then there is no other reason for a new segment. */
+ new_segment = false;
+ }
+ else if ((last_hdr->flags & SEC_LOAD) == 0
+ && (hdr->flags & SEC_LOAD) != 0)
+ {
+ /* We don't want to put a loadable section after a
+ nonloadable section in the same segment. */
+ new_segment = true;
+ }
+ else if (! writable
+ && (hdr->flags & SEC_READONLY) == 0
+ && (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
+ == hdr->lma))
+ {
+ /* We don't want to put a writable section in a read only
+ segment, unless they are on the same page in memory
+ anyhow. We already know that the last section does not
+ bring us past the current section on the page, so the
+ only case in which the new section is not on the same
+ page as the previous section is when the previous section
+ ends precisely on a page boundary. */
+ new_segment = true;
+ }
+ else
+ {
+ /* Otherwise, we can use the same segment. */
+ new_segment = false;
+ }
+
+ if (! new_segment)
+ {
+ if ((hdr->flags & SEC_READONLY) == 0)
+ writable = true;
+ last_hdr = hdr;
+ continue;
+ }
+
+ /* We need a new program segment. We must create a new program
+ header holding all the sections from phdr_index until hdr. */
+
+ m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section);
+ if (m == NULL)
+ goto error_return;
+
+ *pm = m;
+ pm = &m->next;
+
+ if ((hdr->flags & SEC_READONLY) == 0)
+ writable = true;
+ else
+ writable = false;
+
+ last_hdr = hdr;
+ phdr_index = i;
+ phdr_in_section = false;
+ }
+
+ /* Create a final PT_LOAD program segment. */
+ if (last_hdr != NULL)
+ {
+ m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section);
+ if (m == NULL)
+ goto error_return;
+
+ *pm = m;
+ pm = &m->next;
+ }
+
+ /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
+ if (dynsec != NULL)
+ {
+ m = ((struct elf_segment_map *)
+ bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
+ if (m == NULL)
+ goto error_return;
+ m->next = NULL;
+ m->p_type = PT_DYNAMIC;
+ m->count = 1;
+ m->sections[0] = dynsec;
+
+ *pm = m;
+ pm = &m->next;
+ }
+
+ /* For each loadable .note section, add a PT_NOTE segment. We don't
+ use bfd_get_section_by_name, because if we link together
+ nonloadable .note sections and loadable .note sections, we will
+ generate two .note sections in the output file. FIXME: Using
+ names for section types is bogus anyhow. */
+ for (s = abfd->sections; s != NULL; s = s->next)
+ {
+ if ((s->flags & SEC_LOAD) != 0
+ && strncmp (s->name, ".note", 5) == 0)
+ {
+ m = ((struct elf_segment_map *)
+ bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
+ if (m == NULL)
+ goto error_return;
+ m->next = NULL;
+ m->p_type = PT_NOTE;
+ m->count = 1;
+ m->sections[0] = s;
+
+ *pm = m;
+ pm = &m->next;
+ }
+ }
+
+ free (sections);
+ sections = NULL;
+
+ elf_tdata (abfd)->segment_map = mfirst;
+ return true;
+
+ error_return:
+ if (sections != NULL)
+ free (sections);
+ return false;
+}
+
+/* Sort sections by VMA. */
+
+static int
+elf_sort_sections (arg1, arg2)
+ const PTR arg1;
+ const PTR arg2;
+{
+ const asection *sec1 = *(const asection **) arg1;
+ const asection *sec2 = *(const asection **) arg2;
+
+ if (sec1->vma < sec2->vma)
+ return -1;
+ else if (sec1->vma > sec2->vma)
+ return 1;
+
+ /* Sort by LMA. Normally the LMA and the VMA will be the same, and
+ this will do nothing. */
+ if (sec1->lma < sec2->lma)
+ return -1;
+ else if (sec1->lma > sec2->lma)
+ return 1;
+
+ /* Put !SEC_LOAD sections after SEC_LOAD ones. */
+
+#define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
+
+ if (TOEND (sec1))
+ if (TOEND (sec2))
+ return sec1->target_index - sec2->target_index;
+ else
+ return 1;
+
+ if (TOEND (sec2))
+ return -1;
+
+#undef TOEND
+
+ /* Sort by size, to put zero sized sections before others at the
+ same address. */
+
+ if (sec1->_raw_size < sec2->_raw_size)
+ return -1;
+ if (sec1->_raw_size > sec2->_raw_size)
+ return 1;
+
+ return sec1->target_index - sec2->target_index;
+}
+
+/* Assign file positions to the sections based on the mapping from
+ sections to segments. This function also sets up some fields in
+ the file header, and writes out the program headers. */
+
+static boolean
+assign_file_positions_for_segments (abfd)
+ bfd *abfd;
+{
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ unsigned int count;
+ struct elf_segment_map *m;
+ unsigned int alloc;
+ Elf_Internal_Phdr *phdrs;
+ file_ptr off, voff;
+ bfd_vma filehdr_vaddr, filehdr_paddr;
+ bfd_vma phdrs_vaddr, phdrs_paddr;
+ Elf_Internal_Phdr *p;
+
+ if (elf_tdata (abfd)->segment_map == NULL)
+ {
+ if (! map_sections_to_segments (abfd))
+ return false;
+ }
+
+ if (bed->elf_backend_modify_segment_map)
+ {
+ if (! (*bed->elf_backend_modify_segment_map) (abfd))
+ return false;
+ }
+
+ count = 0;
+ for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
+ ++count;
+
+ elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
+ elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
+ elf_elfheader (abfd)->e_phnum = count;
+
+ if (count == 0)
+ return true;
+
+ /* If we already counted the number of program segments, make sure
+ that we allocated enough space. This happens when SIZEOF_HEADERS
+ is used in a linker script. */
+ alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
+ if (alloc != 0 && count > alloc)
+ {
+ ((*_bfd_error_handler)
+ ("%s: Not enough room for program headers (allocated %u, need %u)",
+ bfd_get_filename (abfd), alloc, count));
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ if (alloc == 0)
+ alloc = count;
+
+ phdrs = ((Elf_Internal_Phdr *)
+ bfd_alloc (abfd, alloc * sizeof (Elf_Internal_Phdr)));
+ if (phdrs == NULL)
+ return false;
+
+ off = bed->s->sizeof_ehdr;
+ off += alloc * bed->s->sizeof_phdr;
+
+ filehdr_vaddr = 0;
+ filehdr_paddr = 0;
+ phdrs_vaddr = 0;
+ phdrs_paddr = 0;
+ for (m = elf_tdata (abfd)->segment_map, p = phdrs;
+ m != NULL;
+ m = m->next, p++)
+ {
+ unsigned int i;
+ asection **secpp;
+
+ /* If elf_segment_map is not from map_sections_to_segments, the
+ sections may not be correctly ordered. */
+ if (m->count > 0)
+ qsort (m->sections, (size_t) m->count, sizeof (asection *),
+ elf_sort_sections);
+
+ p->p_type = m->p_type;
+
+ if (m->p_flags_valid)
+ p->p_flags = m->p_flags;
+ else
+ p->p_flags = 0;
+
+ if (p->p_type == PT_LOAD
+ && m->count > 0
+ && (m->sections[0]->flags & SEC_ALLOC) != 0)
+ {
+ if ((abfd->flags & D_PAGED) != 0)
+ off += (m->sections[0]->vma - off) % bed->maxpagesize;
+ else
+ off += ((m->sections[0]->vma - off)
+ % (1 << bfd_get_section_alignment (abfd, m->sections[0])));
+ }
+
+ if (m->count == 0)
+ p->p_vaddr = 0;
+ else
+ p->p_vaddr = m->sections[0]->vma;
+
+ if (m->p_paddr_valid)
+ p->p_paddr = m->p_paddr;
+ else if (m->count == 0)
+ p->p_paddr = 0;
+ else
+ p->p_paddr = m->sections[0]->lma;
+
+ if (p->p_type == PT_LOAD
+ && (abfd->flags & D_PAGED) != 0)
+ p->p_align = bed->maxpagesize;
+ else if (m->count == 0)
+ p->p_align = bed->s->file_align;
+ else
+ p->p_align = 0;
+
+ p->p_offset = 0;
+ p->p_filesz = 0;
+ p->p_memsz = 0;
+
+ if (m->includes_filehdr)
+ {
+ if (! m->p_flags_valid)
+ p->p_flags |= PF_R;
+ p->p_offset = 0;
+ p->p_filesz = bed->s->sizeof_ehdr;
+ p->p_memsz = bed->s->sizeof_ehdr;
+ if (m->count > 0)
+ {
+ BFD_ASSERT (p->p_type == PT_LOAD);
+ p->p_vaddr -= off;
+ if (! m->p_paddr_valid)
+ p->p_paddr -= off;
+ }
+ if (p->p_type == PT_LOAD)
+ {
+ filehdr_vaddr = p->p_vaddr;
+ filehdr_paddr = p->p_paddr;
+ }
+ }
+
+ if (m->includes_phdrs)
+ {
+ if (! m->p_flags_valid)
+ p->p_flags |= PF_R;
+ if (m->includes_filehdr)
+ {
+ if (p->p_type == PT_LOAD)
+ {
+ phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
+ phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
+ }
+ }
+ else
+ {
+ p->p_offset = bed->s->sizeof_ehdr;
+ if (m->count > 0)
+ {
+ BFD_ASSERT (p->p_type == PT_LOAD);
+ p->p_vaddr -= off - p->p_offset;
+ if (! m->p_paddr_valid)
+ p->p_paddr -= off - p->p_offset;
+ }
+ if (p->p_type == PT_LOAD)
+ {
+ phdrs_vaddr = p->p_vaddr;
+ phdrs_paddr = p->p_paddr;
+ }
+ }
+ p->p_filesz += alloc * bed->s->sizeof_phdr;
+ p->p_memsz += alloc * bed->s->sizeof_phdr;
+ }
+
+ if (p->p_type == PT_LOAD)
+ {
+ if (! m->includes_filehdr && ! m->includes_phdrs)
+ p->p_offset = off;
+ else
+ {
+ file_ptr adjust;
+
+ adjust = off - (p->p_offset + p->p_filesz);
+ p->p_filesz += adjust;
+ p->p_memsz += adjust;
+ }
+ }
+
+ voff = off;
+ for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
+ {
+ asection *sec;
+ flagword flags;
+ bfd_size_type align;
+
+ sec = *secpp;
+ flags = sec->flags;
+ align = 1 << bfd_get_section_alignment (abfd, sec);
+
+ if (p->p_type == PT_LOAD)
+ {
+ bfd_vma adjust;
+
+ /* The section VMA must equal the file position modulo
+ the page size. */
+ if ((flags & SEC_ALLOC) != 0)
+ {
+ if ((abfd->flags & D_PAGED) != 0)
+ adjust = (sec->vma - voff) % bed->maxpagesize;
+ else
+ adjust = (sec->vma - voff) % align;
+ if (adjust != 0)
+ {
+ if (i == 0)
+ abort ();
+ p->p_memsz += adjust;
+ off += adjust;
+ voff += adjust;
+ if ((flags & SEC_LOAD) != 0)
+ p->p_filesz += adjust;
+ }
+ }
+
+ sec->filepos = off;
+
+ if ((flags & SEC_LOAD) != 0)
+ off += sec->_raw_size;
+ if ((flags & SEC_ALLOC) != 0)
+ voff += sec->_raw_size;
+ }
+
+ p->p_memsz += sec->_raw_size;
+
+ if ((flags & SEC_LOAD) != 0)
+ p->p_filesz += sec->_raw_size;
+
+ if (align > p->p_align)
+ p->p_align = align;
+
+ if (! m->p_flags_valid)
+ {
+ p->p_flags |= PF_R;
+ if ((flags & SEC_CODE) != 0)
+ p->p_flags |= PF_X;
+ if ((flags & SEC_READONLY) == 0)
+ p->p_flags |= PF_W;
+ }
+ }
+ }
+
+ /* Now that we have set the section file positions, we can set up
+ the file positions for the non PT_LOAD segments. */
+ for (m = elf_tdata (abfd)->segment_map, p = phdrs;
+ m != NULL;
+ m = m->next, p++)
+ {
+ if (p->p_type != PT_LOAD && m->count > 0)
+ {
+ BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
+ p->p_offset = m->sections[0]->filepos;
+ }
+ if (m->count == 0)
+ {
+ if (m->includes_filehdr)
+ {
+ p->p_vaddr = filehdr_vaddr;
+ if (! m->p_paddr_valid)
+ p->p_paddr = filehdr_paddr;
+ }
+ else if (m->includes_phdrs)
+ {
+ p->p_vaddr = phdrs_vaddr;
+ if (! m->p_paddr_valid)
+ p->p_paddr = phdrs_paddr;
+ }
+ }
+ }
+
+ /* Clear out any program headers we allocated but did not use. */
+ for (; count < alloc; count++, p++)
+ {
+ memset (p, 0, sizeof *p);
+ p->p_type = PT_NULL;
+ }
+
+ elf_tdata (abfd)->phdr = phdrs;
+
+ elf_tdata (abfd)->next_file_pos = off;
+
+ /* Write out the program headers. */
+ if (bfd_seek (abfd, bed->s->sizeof_ehdr, SEEK_SET) != 0
+ || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
+ return false;
+
+ return true;
+}
+
+/* Get the size of the program header.
+
+ If this is called by the linker before any of the section VMA's are set, it
+ can't calculate the correct value for a strange memory layout. This only
+ happens when SIZEOF_HEADERS is used in a linker script. In this case,
+ SORTED_HDRS is NULL and we assume the normal scenario of one text and one
+ data segment (exclusive of .interp and .dynamic).
+
+ ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
+ will be two segments. */
+
+static bfd_size_type
+get_program_header_size (abfd)
+ bfd *abfd;
+{
+ size_t segs;
+ asection *s;
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ /* We can't return a different result each time we're called. */
+ if (elf_tdata (abfd)->program_header_size != 0)
+ return elf_tdata (abfd)->program_header_size;
+
+ if (elf_tdata (abfd)->segment_map != NULL)
+ {
+ struct elf_segment_map *m;
+
+ segs = 0;
+ for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
+ ++segs;
+ elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
+ return elf_tdata (abfd)->program_header_size;
+ }
+
+ /* Assume we will need exactly two PT_LOAD segments: one for text
+ and one for data. */
+ segs = 2;
+
+ s = bfd_get_section_by_name (abfd, ".interp");
+ if (s != NULL && (s->flags & SEC_LOAD) != 0)
+ {
+ /* If we have a loadable interpreter section, we need a
+ PT_INTERP segment. In this case, assume we also need a
+ PT_PHDR segment, although that may not be true for all
+ targets. */
+ segs += 2;
+ }
+
+ if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
+ {
+ /* We need a PT_DYNAMIC segment. */
+ ++segs;
+ }
+
+ for (s = abfd->sections; s != NULL; s = s->next)
+ {
+ if ((s->flags & SEC_LOAD) != 0
+ && strncmp (s->name, ".note", 5) == 0)
+ {
+ /* We need a PT_NOTE segment. */
+ ++segs;
+ }
+ }
+
+ /* Let the backend count up any program headers it might need. */
+ if (bed->elf_backend_additional_program_headers)
+ {
+ int a;
+
+ a = (*bed->elf_backend_additional_program_headers) (abfd);
+ if (a == -1)
+ abort ();
+ segs += a;
+ }
+
+ elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
+ return elf_tdata (abfd)->program_header_size;
+}
+
+/* Work out the file positions of all the sections. This is called by
+ _bfd_elf_compute_section_file_positions. All the section sizes and
+ VMAs must be known before this is called.
+
+ We do not consider reloc sections at this point, unless they form
+ part of the loadable image. Reloc sections are assigned file
+ positions in assign_file_positions_for_relocs, which is called by
+ write_object_contents and final_link.
+
+ We also don't set the positions of the .symtab and .strtab here. */
+
+static boolean
+assign_file_positions_except_relocs (abfd)
+ bfd *abfd;
+{
+ struct elf_obj_tdata * const tdata = elf_tdata (abfd);
+ Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
+ Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
+ file_ptr off;
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
+ {
+ Elf_Internal_Shdr **hdrpp;
+ unsigned int i;
+
+ /* Start after the ELF header. */
+ off = i_ehdrp->e_ehsize;
+
+ /* We are not creating an executable, which means that we are
+ not creating a program header, and that the actual order of
+ the sections in the file is unimportant. */
+ for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
+ {
+ Elf_Internal_Shdr *hdr;
+
+ hdr = *hdrpp;
+ if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
+ {
+ hdr->sh_offset = -1;
+ continue;
+ }
+ if (i == tdata->symtab_section
+ || i == tdata->strtab_section)
+ {
+ hdr->sh_offset = -1;
+ continue;
+ }
+
+ off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
+ }
+ }
+ else
+ {
+ unsigned int i;
+ Elf_Internal_Shdr **hdrpp;
+
+ /* Assign file positions for the loaded sections based on the
+ assignment of sections to segments. */
+ if (! assign_file_positions_for_segments (abfd))
+ return false;
+
+ /* Assign file positions for the other sections. */
+
+ off = elf_tdata (abfd)->next_file_pos;
+ for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
+ {
+ Elf_Internal_Shdr *hdr;
+
+ hdr = *hdrpp;
+ if (hdr->bfd_section != NULL
+ && hdr->bfd_section->filepos != 0)
+ hdr->sh_offset = hdr->bfd_section->filepos;
+ else if ((hdr->sh_flags & SHF_ALLOC) != 0)
+ {
+ ((*_bfd_error_handler)
+ ("%s: warning: allocated section `%s' not in segment",
+ bfd_get_filename (abfd),
+ (hdr->bfd_section == NULL
+ ? "*unknown*"
+ : hdr->bfd_section->name)));
+ if ((abfd->flags & D_PAGED) != 0)
+ off += (hdr->sh_addr - off) % bed->maxpagesize;
+ else
+ off += (hdr->sh_addr - off) % hdr->sh_addralign;
+ off = _bfd_elf_assign_file_position_for_section (hdr, off,
+ false);
+ }
+ else if (hdr->sh_type == SHT_REL
+ || hdr->sh_type == SHT_RELA
+ || hdr == i_shdrpp[tdata->symtab_section]
+ || hdr == i_shdrpp[tdata->strtab_section])
+ hdr->sh_offset = -1;
+ else
+ off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
+ }
+ }
+
+ /* Place the section headers. */
+ off = align_file_position (off, bed->s->file_align);
+ i_ehdrp->e_shoff = off;
+ off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
+
+ elf_tdata (abfd)->next_file_pos = off;
+
+ return true;
+}
+
+static boolean
+prep_headers (abfd)
+ bfd *abfd;
+{
+ Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
+ Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
+ Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
+ int count;
+ struct bfd_strtab_hash *shstrtab;
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ i_ehdrp = elf_elfheader (abfd);
+ i_shdrp = elf_elfsections (abfd);
+
+ shstrtab = _bfd_elf_stringtab_init ();
+ if (shstrtab == NULL)
+ return false;
+
+ elf_shstrtab (abfd) = shstrtab;
+
+ i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
+ i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
+ i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
+ i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
+
+ i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
+ i_ehdrp->e_ident[EI_DATA] =
+ bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
+ i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
+
+ for (count = EI_PAD; count < EI_NIDENT; count++)
+ i_ehdrp->e_ident[count] = 0;
+
+ if ((abfd->flags & DYNAMIC) != 0)
+ i_ehdrp->e_type = ET_DYN;
+ else if ((abfd->flags & EXEC_P) != 0)
+ i_ehdrp->e_type = ET_EXEC;
+ else
+ i_ehdrp->e_type = ET_REL;
+
+ switch (bfd_get_arch (abfd))
+ {
+ case bfd_arch_unknown:
+ i_ehdrp->e_machine = EM_NONE;
+ break;
+ case bfd_arch_sparc:
+ if (bed->s->arch_size == 64)
+ i_ehdrp->e_machine = EM_SPARC64;
+ else
+ i_ehdrp->e_machine = EM_SPARC;
+ break;
+ case bfd_arch_i386:
+ i_ehdrp->e_machine = EM_386;
+ break;
+ case bfd_arch_m68k:
+ i_ehdrp->e_machine = EM_68K;
+ break;
+ case bfd_arch_m88k:
+ i_ehdrp->e_machine = EM_88K;
+ break;
+ case bfd_arch_i860:
+ i_ehdrp->e_machine = EM_860;
+ break;
+ case bfd_arch_mips: /* MIPS Rxxxx */
+ i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
+ break;
+ case bfd_arch_hppa:
+ i_ehdrp->e_machine = EM_PARISC;
+ break;
+ case bfd_arch_powerpc:
+ i_ehdrp->e_machine = EM_PPC;
+ break;
+ case bfd_arch_alpha:
+ i_ehdrp->e_machine = EM_ALPHA;
+ break;
+ case bfd_arch_sh:
+ i_ehdrp->e_machine = EM_SH;
+ break;
+ case bfd_arch_d10v:
+ i_ehdrp->e_machine = EM_CYGNUS_D10V;
+ break;
+/* start-sanitize-d30v */
+ case bfd_arch_d30v:
+ i_ehdrp->e_machine = EM_CYGNUS_D30V;
+ break;
+/* end-sanitize-d30v */
+/* start-sanitize-v850 */
+ case bfd_arch_v850:
+ i_ehdrp->e_machine = EM_CYGNUS_V850;
+ break;
+/* end-sanitize-v850 */
+/* start-sanitize-arc */
+ case bfd_arch_arc:
+ i_ehdrp->e_machine = EM_CYGNUS_ARC;
+ break;
+/* end-sanitize-arc */
+ case bfd_arch_m32r:
+ i_ehdrp->e_machine = EM_CYGNUS_M32R;
+ break;
+ case bfd_arch_mn10200:
+ i_ehdrp->e_machine = EM_CYGNUS_MN10200;
+ break;
+ case bfd_arch_mn10300:
+ i_ehdrp->e_machine = EM_CYGNUS_MN10300;
+ break;
+ /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
+ default:
+ i_ehdrp->e_machine = EM_NONE;
+ }
+ i_ehdrp->e_version = bed->s->ev_current;
+ i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
+
+ /* no program header, for now. */
+ i_ehdrp->e_phoff = 0;
+ i_ehdrp->e_phentsize = 0;
+ i_ehdrp->e_phnum = 0;
+
+ /* each bfd section is section header entry */
+ i_ehdrp->e_entry = bfd_get_start_address (abfd);
+ i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
+
+ /* if we're building an executable, we'll need a program header table */
+ if (abfd->flags & EXEC_P)
+ {
+ /* it all happens later */
+#if 0
+ i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
+
+ /* elf_build_phdrs() returns a (NULL-terminated) array of
+ Elf_Internal_Phdrs */
+ i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
+ i_ehdrp->e_phoff = outbase;
+ outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
+#endif
+ }
+ else
+ {
+ i_ehdrp->e_phentsize = 0;
+ i_phdrp = 0;
+ i_ehdrp->e_phoff = 0;
+ }
+
+ elf_tdata (abfd)->symtab_hdr.sh_name =
+ (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false);
+ elf_tdata (abfd)->strtab_hdr.sh_name =
+ (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false);
+ elf_tdata (abfd)->shstrtab_hdr.sh_name =
+ (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false);
+ if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
+ || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
+ || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
+ return false;
+
+ return true;
+}
+
+/* Assign file positions for all the reloc sections which are not part
+ of the loadable file image. */
+
+void
+_bfd_elf_assign_file_positions_for_relocs (abfd)
+ bfd *abfd;
+{
+ file_ptr off;
+ unsigned int i;
+ Elf_Internal_Shdr **shdrpp;
+
+ off = elf_tdata (abfd)->next_file_pos;
+
+ for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
+ i < elf_elfheader (abfd)->e_shnum;
+ i++, shdrpp++)
+ {
+ Elf_Internal_Shdr *shdrp;
+
+ shdrp = *shdrpp;
+ if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
+ && shdrp->sh_offset == -1)
+ off = _bfd_elf_assign_file_position_for_section (shdrp, off, true);
+ }
+
+ elf_tdata (abfd)->next_file_pos = off;
+}
+
+boolean
+_bfd_elf_write_object_contents (abfd)
+ bfd *abfd;
+{
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ Elf_Internal_Ehdr *i_ehdrp;
+ Elf_Internal_Shdr **i_shdrp;
+ boolean failed;
+ unsigned int count;
+
+ if (! abfd->output_has_begun
+ && ! _bfd_elf_compute_section_file_positions (abfd,
+ (struct bfd_link_info *) NULL))
+ return false;
+
+ i_shdrp = elf_elfsections (abfd);
+ i_ehdrp = elf_elfheader (abfd);
+
+ failed = false;
+ bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
+ if (failed)
+ return false;
+ _bfd_elf_assign_file_positions_for_relocs (abfd);
+
+ /* After writing the headers, we need to write the sections too... */
+ for (count = 1; count < i_ehdrp->e_shnum; count++)
+ {
+ if (bed->elf_backend_section_processing)
+ (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
+ if (i_shdrp[count]->contents)
+ {
+ if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
+ || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size,
+ 1, abfd)
+ != i_shdrp[count]->sh_size))
+ return false;
+ }
+ }
+
+ /* Write out the section header names. */
+ if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
+ || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd)))
+ return false;
+
+ if (bed->elf_backend_final_write_processing)
+ (*bed->elf_backend_final_write_processing) (abfd,
+ elf_tdata (abfd)->linker);
+
+ return bed->s->write_shdrs_and_ehdr (abfd);
+}
+
+/* given a section, search the header to find them... */
+int
+_bfd_elf_section_from_bfd_section (abfd, asect)
+ bfd *abfd;
+ struct sec *asect;
+{
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
+ int index;
+ Elf_Internal_Shdr *hdr;
+ int maxindex = elf_elfheader (abfd)->e_shnum;
+
+ for (index = 0; index < maxindex; index++)
+ {
+ hdr = i_shdrp[index];
+ if (hdr->bfd_section == asect)
+ return index;
+ }
+
+ if (bed->elf_backend_section_from_bfd_section)
+ {
+ for (index = 0; index < maxindex; index++)
+ {
+ int retval;
+
+ hdr = i_shdrp[index];
+ retval = index;
+ if ((*bed->elf_backend_section_from_bfd_section)
+ (abfd, hdr, asect, &retval))
+ return retval;
+ }
+ }
+
+ if (bfd_is_abs_section (asect))
+ return SHN_ABS;
+ if (bfd_is_com_section (asect))
+ return SHN_COMMON;
+ if (bfd_is_und_section (asect))
+ return SHN_UNDEF;
+
+ return -1;
+}
+
+/* Given a BFD symbol, return the index in the ELF symbol table, or -1
+ on error. */
+
+int
+_bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
+ bfd *abfd;
+ asymbol **asym_ptr_ptr;
+{
+ asymbol *asym_ptr = *asym_ptr_ptr;
+ int idx;
+ flagword flags = asym_ptr->flags;
+
+ /* When gas creates relocations against local labels, it creates its
+ own symbol for the section, but does put the symbol into the
+ symbol chain, so udata is 0. When the linker is generating
+ relocatable output, this section symbol may be for one of the
+ input sections rather than the output section. */
+ if (asym_ptr->udata.i == 0
+ && (flags & BSF_SECTION_SYM)
+ && asym_ptr->section)
+ {
+ int indx;
+
+ if (asym_ptr->section->output_section != NULL)
+ indx = asym_ptr->section->output_section->index;
+ else
+ indx = asym_ptr->section->index;
+ if (elf_section_syms (abfd)[indx])
+ asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
+ }
+
+ idx = asym_ptr->udata.i;
+
+ if (idx == 0)
+ {
+ /* This case can occur when using --strip-symbol on a symbol
+ which is used in a relocation entry. */
+ (*_bfd_error_handler)
+ ("%s: symbol `%s' required but not present",
+ bfd_get_filename (abfd), bfd_asymbol_name (asym_ptr));
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+
+#if DEBUG & 4
+ {
+ fprintf (stderr,
+ "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
+ (long) asym_ptr, asym_ptr->name, idx, flags,
+ elf_symbol_flags (flags));
+ fflush (stderr);
+ }
+#endif
+
+ return idx;
+}
+
+/* Copy private BFD data. This copies any program header information. */
+
+static boolean
+copy_private_bfd_data (ibfd, obfd)
+ bfd *ibfd;
+ bfd *obfd;
+{
+ Elf_Internal_Ehdr *iehdr;
+ struct elf_segment_map *mfirst;
+ struct elf_segment_map **pm;
+ Elf_Internal_Phdr *p;
+ unsigned int i, c;
+
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+ || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ return true;
+
+ if (elf_tdata (ibfd)->phdr == NULL)
+ return true;
+
+ iehdr = elf_elfheader (ibfd);
+
+ mfirst = NULL;
+ pm = &mfirst;
+
+ c = elf_elfheader (ibfd)->e_phnum;
+ for (i = 0, p = elf_tdata (ibfd)->phdr; i < c; i++, p++)
+ {
+ unsigned int csecs;
+ asection *s;
+ struct elf_segment_map *m;
+ unsigned int isec;
+
+ csecs = 0;
+
+ /* The complicated case when p_vaddr is 0 is to handle the
+ Solaris linker, which generates a PT_INTERP section with
+ p_vaddr and p_memsz set to 0. */
+ for (s = ibfd->sections; s != NULL; s = s->next)
+ if (((s->vma >= p->p_vaddr
+ && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz
+ || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz))
+ || (p->p_vaddr == 0
+ && p->p_filesz > 0
+ && (s->flags & SEC_HAS_CONTENTS) != 0
+ && (bfd_vma) s->filepos >= p->p_offset
+ && ((bfd_vma) s->filepos + s->_raw_size
+ <= p->p_offset + p->p_filesz)))
+ && (s->flags & SEC_ALLOC) != 0
+ && s->output_section != NULL)
+ ++csecs;
+
+ m = ((struct elf_segment_map *)
+ bfd_alloc (obfd,
+ (sizeof (struct elf_segment_map)
+ + ((size_t) csecs - 1) * sizeof (asection *))));
+ if (m == NULL)
+ return false;
+
+ m->next = NULL;
+ m->p_type = p->p_type;
+ m->p_flags = p->p_flags;
+ m->p_flags_valid = 1;
+ m->p_paddr = p->p_paddr;
+ m->p_paddr_valid = 1;
+
+ m->includes_filehdr = (p->p_offset == 0
+ && p->p_filesz >= iehdr->e_ehsize);
+
+ m->includes_phdrs = (p->p_offset <= (bfd_vma) iehdr->e_phoff
+ && (p->p_offset + p->p_filesz
+ >= ((bfd_vma) iehdr->e_phoff
+ + iehdr->e_phnum * iehdr->e_phentsize)));
+
+ isec = 0;
+ for (s = ibfd->sections; s != NULL; s = s->next)
+ {
+ if (((s->vma >= p->p_vaddr
+ && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz
+ || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz))
+ || (p->p_vaddr == 0
+ && p->p_filesz > 0
+ && (s->flags & SEC_HAS_CONTENTS) != 0
+ && (bfd_vma) s->filepos >= p->p_offset
+ && ((bfd_vma) s->filepos + s->_raw_size
+ <= p->p_offset + p->p_filesz)))
+ && (s->flags & SEC_ALLOC) != 0
+ && s->output_section != NULL)
+ {
+ m->sections[isec] = s->output_section;
+ ++isec;
+ }
+ }
+ BFD_ASSERT (isec == csecs);
+ m->count = csecs;
+
+ *pm = m;
+ pm = &m->next;
+ }
+
+ elf_tdata (obfd)->segment_map = mfirst;
+
+ return true;
+}
+
+/* Copy private section information. This copies over the entsize
+ field, and sometimes the info field. */
+
+boolean
+_bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
+ bfd *ibfd;
+ asection *isec;
+ bfd *obfd;
+ asection *osec;
+{
+ Elf_Internal_Shdr *ihdr, *ohdr;
+
+ if (ibfd->xvec->flavour != bfd_target_elf_flavour
+ || obfd->xvec->flavour != bfd_target_elf_flavour)
+ return true;
+
+ /* Copy over private BFD data if it has not already been copied.
+ This must be done here, rather than in the copy_private_bfd_data
+ entry point, because the latter is called after the section
+ contents have been set, which means that the program headers have
+ already been worked out. */
+ if (elf_tdata (obfd)->segment_map == NULL
+ && elf_tdata (ibfd)->phdr != NULL)
+ {
+ asection *s;
+
+ /* Only set up the segments when all the sections have been set
+ up. */
+ for (s = ibfd->sections; s != NULL; s = s->next)
+ if (s->output_section == NULL)
+ break;
+ if (s == NULL)
+ {
+ if (! copy_private_bfd_data (ibfd, obfd))
+ return false;
+ }
+ }
+
+ ihdr = &elf_section_data (isec)->this_hdr;
+ ohdr = &elf_section_data (osec)->this_hdr;
+
+ ohdr->sh_entsize = ihdr->sh_entsize;
+
+ if (ihdr->sh_type == SHT_SYMTAB
+ || ihdr->sh_type == SHT_DYNSYM
+ || ihdr->sh_type == SHT_GNU_verneed
+ || ihdr->sh_type == SHT_GNU_verdef)
+ ohdr->sh_info = ihdr->sh_info;
+
+ return true;
+}
+
+/* Copy private symbol information. If this symbol is in a section
+ which we did not map into a BFD section, try to map the section
+ index correctly. We use special macro definitions for the mapped
+ section indices; these definitions are interpreted by the
+ swap_out_syms function. */
+
+#define MAP_ONESYMTAB (SHN_LORESERVE - 1)
+#define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
+#define MAP_STRTAB (SHN_LORESERVE - 3)
+#define MAP_SHSTRTAB (SHN_LORESERVE - 4)
+
+boolean
+_bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg)
+ bfd *ibfd;
+ asymbol *isymarg;
+ bfd *obfd;
+ asymbol *osymarg;
+{
+ elf_symbol_type *isym, *osym;
+
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+ || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ return true;
+
+ isym = elf_symbol_from (ibfd, isymarg);
+ osym = elf_symbol_from (obfd, osymarg);
+
+ if (isym != NULL
+ && osym != NULL
+ && bfd_is_abs_section (isym->symbol.section))
+ {
+ unsigned int shndx;
+
+ shndx = isym->internal_elf_sym.st_shndx;
+ if (shndx == elf_onesymtab (ibfd))
+ shndx = MAP_ONESYMTAB;
+ else if (shndx == elf_dynsymtab (ibfd))
+ shndx = MAP_DYNSYMTAB;
+ else if (shndx == elf_tdata (ibfd)->strtab_section)
+ shndx = MAP_STRTAB;
+ else if (shndx == elf_tdata (ibfd)->shstrtab_section)
+ shndx = MAP_SHSTRTAB;
+ osym->internal_elf_sym.st_shndx = shndx;
+ }
+
+ return true;
+}
+
+/* Swap out the symbols. */
+
+static boolean
+swap_out_syms (abfd, sttp)
+ bfd *abfd;
+ struct bfd_strtab_hash **sttp;
+{
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ if (!elf_map_symbols (abfd))
+ return false;
+
+ /* Dump out the symtabs. */
+ {
+ int symcount = bfd_get_symcount (abfd);
+ asymbol **syms = bfd_get_outsymbols (abfd);
+ struct bfd_strtab_hash *stt;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Shdr *symstrtab_hdr;
+ char *outbound_syms;
+ int idx;
+
+ stt = _bfd_elf_stringtab_init ();
+ if (stt == NULL)
+ return false;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ symtab_hdr->sh_type = SHT_SYMTAB;
+ symtab_hdr->sh_entsize = bed->s->sizeof_sym;
+ symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
+ symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
+ symtab_hdr->sh_addralign = bed->s->file_align;
+
+ symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
+ symstrtab_hdr->sh_type = SHT_STRTAB;
+
+ outbound_syms = bfd_alloc (abfd,
+ (1 + symcount) * bed->s->sizeof_sym);
+ if (outbound_syms == NULL)
+ return false;
+ symtab_hdr->contents = (PTR) outbound_syms;
+
+ /* now generate the data (for "contents") */
+ {
+ /* Fill in zeroth symbol and swap it out. */
+ Elf_Internal_Sym sym;
+ sym.st_name = 0;
+ sym.st_value = 0;
+ sym.st_size = 0;
+ sym.st_info = 0;
+ sym.st_other = 0;
+ sym.st_shndx = SHN_UNDEF;
+ bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
+ outbound_syms += bed->s->sizeof_sym;
+ }
+ for (idx = 0; idx < symcount; idx++)
+ {
+ Elf_Internal_Sym sym;
+ bfd_vma value = syms[idx]->value;
+ elf_symbol_type *type_ptr;
+ flagword flags = syms[idx]->flags;
+ int type;
+
+ if (flags & BSF_SECTION_SYM)
+ /* Section symbols have no names. */
+ sym.st_name = 0;
+ else
+ {
+ sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
+ syms[idx]->name,
+ true, false);
+ if (sym.st_name == (unsigned long) -1)
+ return false;
+ }
+
+ type_ptr = elf_symbol_from (abfd, syms[idx]);
+
+ if (bfd_is_com_section (syms[idx]->section))
+ {
+ /* ELF common symbols put the alignment into the `value' field,
+ and the size into the `size' field. This is backwards from
+ how BFD handles it, so reverse it here. */
+ sym.st_size = value;
+ if (type_ptr == NULL
+ || type_ptr->internal_elf_sym.st_value == 0)
+ sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
+ else
+ sym.st_value = type_ptr->internal_elf_sym.st_value;
+ sym.st_shndx = _bfd_elf_section_from_bfd_section (abfd,
+ syms[idx]->section);
+ }
+ else
+ {
+ asection *sec = syms[idx]->section;
+ int shndx;
+
+ if (sec->output_section)
+ {
+ value += sec->output_offset;
+ sec = sec->output_section;
+ }
+ value += sec->vma;
+ sym.st_value = value;
+ sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
+
+ if (bfd_is_abs_section (sec)
+ && type_ptr != NULL
+ && type_ptr->internal_elf_sym.st_shndx != 0)
+ {
+ /* This symbol is in a real ELF section which we did
+ not create as a BFD section. Undo the mapping done
+ by copy_private_symbol_data. */
+ shndx = type_ptr->internal_elf_sym.st_shndx;
+ switch (shndx)
+ {
+ case MAP_ONESYMTAB:
+ shndx = elf_onesymtab (abfd);
+ break;
+ case MAP_DYNSYMTAB:
+ shndx = elf_dynsymtab (abfd);
+ break;
+ case MAP_STRTAB:
+ shndx = elf_tdata (abfd)->strtab_section;
+ break;
+ case MAP_SHSTRTAB:
+ shndx = elf_tdata (abfd)->shstrtab_section;
+ break;
+ default:
+ break;
+ }
+ }
+ else
+ {
+ shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+
+ if (shndx == -1)
+ {
+ asection *sec2;
+
+ /* Writing this would be a hell of a lot easier if
+ we had some decent documentation on bfd, and
+ knew what to expect of the library, and what to
+ demand of applications. For example, it
+ appears that `objcopy' might not set the
+ section of a symbol to be a section that is
+ actually in the output file. */
+ sec2 = bfd_get_section_by_name (abfd, sec->name);
+ BFD_ASSERT (sec2 != 0);
+ shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
+ BFD_ASSERT (shndx != -1);
+ }
+ }
+
+ sym.st_shndx = shndx;
+ }
+
+ if ((flags & BSF_FUNCTION) != 0)
+ type = STT_FUNC;
+ else if ((flags & BSF_OBJECT) != 0)
+ type = STT_OBJECT;
+ else
+ type = STT_NOTYPE;
+
+ if (bfd_is_com_section (syms[idx]->section))
+ sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
+ else if (bfd_is_und_section (syms[idx]->section))
+ sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
+ ? STB_WEAK
+ : STB_GLOBAL),
+ type);
+ else if (flags & BSF_SECTION_SYM)
+ sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
+ else if (flags & BSF_FILE)
+ sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
+ else
+ {
+ int bind = STB_LOCAL;
+
+ if (flags & BSF_LOCAL)
+ bind = STB_LOCAL;
+ else if (flags & BSF_WEAK)
+ bind = STB_WEAK;
+ else if (flags & BSF_GLOBAL)
+ bind = STB_GLOBAL;
+
+ sym.st_info = ELF_ST_INFO (bind, type);
+ }
+
+ if (type_ptr != NULL)
+ sym.st_other = type_ptr->internal_elf_sym.st_other;
+ else
+ sym.st_other = 0;
+
+ bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
+ outbound_syms += bed->s->sizeof_sym;
+ }
+
+ *sttp = stt;
+ symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
+ symstrtab_hdr->sh_type = SHT_STRTAB;
+
+ symstrtab_hdr->sh_flags = 0;
+ symstrtab_hdr->sh_addr = 0;
+ symstrtab_hdr->sh_entsize = 0;
+ symstrtab_hdr->sh_link = 0;
+ symstrtab_hdr->sh_info = 0;
+ symstrtab_hdr->sh_addralign = 1;
+ }
+
+ return true;
+}
+
+/* Return the number of bytes required to hold the symtab vector.
+
+ Note that we base it on the count plus 1, since we will null terminate
+ the vector allocated based on this size. However, the ELF symbol table
+ always has a dummy entry as symbol #0, so it ends up even. */
+
+long
+_bfd_elf_get_symtab_upper_bound (abfd)
+ bfd *abfd;
+{
+ long symcount;
+ long symtab_size;
+ Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
+
+ symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
+ symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
+
+ return symtab_size;
+}
+
+long
+_bfd_elf_get_dynamic_symtab_upper_bound (abfd)
+ bfd *abfd;
+{
+ long symcount;
+ long symtab_size;
+ Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
+
+ if (elf_dynsymtab (abfd) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
+ symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
+
+ return symtab_size;
+}
+
+long
+_bfd_elf_get_reloc_upper_bound (abfd, asect)
+ bfd *abfd;
+ sec_ptr asect;
+{
+ return (asect->reloc_count + 1) * sizeof (arelent *);
+}
+
+/* Canonicalize the relocs. */
+
+long
+_bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
+ bfd *abfd;
+ sec_ptr section;
+ arelent **relptr;
+ asymbol **symbols;
+{
+ arelent *tblptr;
+ unsigned int i;
+
+ if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd,
+ section,
+ symbols,
+ false))
+ return -1;
+
+ tblptr = section->relocation;
+ for (i = 0; i < section->reloc_count; i++)
+ *relptr++ = tblptr++;
+
+ *relptr = NULL;
+
+ return section->reloc_count;
+}
+
+long
+_bfd_elf_get_symtab (abfd, alocation)
+ bfd *abfd;
+ asymbol **alocation;
+{
+ long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, false);
+
+ if (symcount >= 0)
+ bfd_get_symcount (abfd) = symcount;
+ return symcount;
+}
+
+long
+_bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
+ bfd *abfd;
+ asymbol **alocation;
+{
+ return get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, true);
+}
+
+/* Return the size required for the dynamic reloc entries. Any
+ section that was actually installed in the BFD, and has type
+ SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
+ considered to be a dynamic reloc section. */
+
+long
+_bfd_elf_get_dynamic_reloc_upper_bound (abfd)
+ bfd *abfd;
+{
+ long ret;
+ asection *s;
+
+ if (elf_dynsymtab (abfd) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ ret = sizeof (arelent *);
+ for (s = abfd->sections; s != NULL; s = s->next)
+ if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
+ && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
+ || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
+ ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
+ * sizeof (arelent *));
+
+ return ret;
+}
+
+/* Canonicalize the dynamic relocation entries. Note that we return
+ the dynamic relocations as a single block, although they are
+ actually associated with particular sections; the interface, which
+ was designed for SunOS style shared libraries, expects that there
+ is only one set of dynamic relocs. Any section that was actually
+ installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
+ the dynamic symbol table, is considered to be a dynamic reloc
+ section. */
+
+long
+_bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
+ bfd *abfd;
+ arelent **storage;
+ asymbol **syms;
+{
+ boolean (*slurp_relocs) PARAMS ((bfd *, asection *, asymbol **, boolean));
+ asection *s;
+ long ret;
+
+ if (elf_dynsymtab (abfd) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
+ ret = 0;
+ for (s = abfd->sections; s != NULL; s = s->next)
+ {
+ if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
+ && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
+ || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
+ {
+ arelent *p;
+ long count, i;
+
+ if (! (*slurp_relocs) (abfd, s, syms, true))
+ return -1;
+ count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
+ p = s->relocation;
+ for (i = 0; i < count; i++)
+ *storage++ = p++;
+ ret += count;
+ }
+ }
+
+ *storage = NULL;
+
+ return ret;
+}
+\f
+/* Read in the version information. */
+
+boolean
+_bfd_elf_slurp_version_tables (abfd)
+ bfd *abfd;
+{
+ bfd_byte *contents = NULL;
+
+ if (elf_dynverdef (abfd) != 0)
+ {
+ Elf_Internal_Shdr *hdr;
+ Elf_External_Verdef *everdef;
+ Elf_Internal_Verdef *iverdef;
+ unsigned int i;
+
+ hdr = &elf_tdata (abfd)->dynverdef_hdr;
+
+ elf_tdata (abfd)->verdef =
+ ((Elf_Internal_Verdef *)
+ bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verdef)));
+ if (elf_tdata (abfd)->verdef == NULL)
+ goto error_return;
+
+ elf_tdata (abfd)->cverdefs = hdr->sh_info;
+
+ contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
+ if (contents == NULL)
+ goto error_return;
+ if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
+ || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
+ goto error_return;
+
+ everdef = (Elf_External_Verdef *) contents;
+ iverdef = elf_tdata (abfd)->verdef;
+ for (i = 0; i < hdr->sh_info; i++, iverdef++)
+ {
+ Elf_External_Verdaux *everdaux;
+ Elf_Internal_Verdaux *iverdaux;
+ unsigned int j;
+
+ _bfd_elf_swap_verdef_in (abfd, everdef, iverdef);
+
+ iverdef->vd_bfd = abfd;
+
+ iverdef->vd_auxptr = ((Elf_Internal_Verdaux *)
+ bfd_alloc (abfd,
+ (iverdef->vd_cnt
+ * sizeof (Elf_Internal_Verdaux))));
+ if (iverdef->vd_auxptr == NULL)
+ goto error_return;
+
+ everdaux = ((Elf_External_Verdaux *)
+ ((bfd_byte *) everdef + iverdef->vd_aux));
+ iverdaux = iverdef->vd_auxptr;
+ for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
+ {
+ _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
+
+ iverdaux->vda_nodename =
+ bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
+ iverdaux->vda_name);
+ if (iverdaux->vda_nodename == NULL)
+ goto error_return;
+
+ if (j + 1 < iverdef->vd_cnt)
+ iverdaux->vda_nextptr = iverdaux + 1;
+ else
+ iverdaux->vda_nextptr = NULL;
+
+ everdaux = ((Elf_External_Verdaux *)
+ ((bfd_byte *) everdaux + iverdaux->vda_next));
+ }
+
+ iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
+
+ if (i + 1 < hdr->sh_info)
+ iverdef->vd_nextdef = iverdef + 1;
+ else
+ iverdef->vd_nextdef = NULL;
+
+ everdef = ((Elf_External_Verdef *)
+ ((bfd_byte *) everdef + iverdef->vd_next));
+ }
+
+ free (contents);
+ contents = NULL;
+ }
+
+ if (elf_dynverref (abfd) != 0)
+ {
+ Elf_Internal_Shdr *hdr;
+ Elf_External_Verneed *everneed;
+ Elf_Internal_Verneed *iverneed;
+ unsigned int i;
+
+ hdr = &elf_tdata (abfd)->dynverref_hdr;
+
+ elf_tdata (abfd)->verref =
+ ((Elf_Internal_Verneed *)
+ bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verneed)));
+ if (elf_tdata (abfd)->verref == NULL)
+ goto error_return;
+
+ elf_tdata (abfd)->cverrefs = hdr->sh_info;
+
+ contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
+ if (contents == NULL)
+ goto error_return;
+ if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
+ || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
+ goto error_return;
+
+ everneed = (Elf_External_Verneed *) contents;
+ iverneed = elf_tdata (abfd)->verref;
+ for (i = 0; i < hdr->sh_info; i++, iverneed++)
+ {
+ Elf_External_Vernaux *evernaux;
+ Elf_Internal_Vernaux *ivernaux;
+ unsigned int j;
+
+ _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
+
+ iverneed->vn_bfd = abfd;
+
+ iverneed->vn_filename =
+ bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
+ iverneed->vn_file);
+ if (iverneed->vn_filename == NULL)
+ goto error_return;
+
+ iverneed->vn_auxptr =
+ ((Elf_Internal_Vernaux *)
+ bfd_alloc (abfd,
+ iverneed->vn_cnt * sizeof (Elf_Internal_Vernaux)));
+
+ evernaux = ((Elf_External_Vernaux *)
+ ((bfd_byte *) everneed + iverneed->vn_aux));
+ ivernaux = iverneed->vn_auxptr;
+ for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
+ {
+ _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
+
+ ivernaux->vna_nodename =
+ bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
+ ivernaux->vna_name);
+ if (ivernaux->vna_nodename == NULL)
+ goto error_return;
+
+ if (j + 1 < iverneed->vn_cnt)
+ ivernaux->vna_nextptr = ivernaux + 1;
+ else
+ ivernaux->vna_nextptr = NULL;
+
+ evernaux = ((Elf_External_Vernaux *)
+ ((bfd_byte *) evernaux + ivernaux->vna_next));
+ }
+
+ if (i + 1 < hdr->sh_info)
+ iverneed->vn_nextref = iverneed + 1;
+ else
+ iverneed->vn_nextref = NULL;
+
+ everneed = ((Elf_External_Verneed *)
+ ((bfd_byte *) everneed + iverneed->vn_next));
+ }
+
+ free (contents);
+ contents = NULL;
+ }
+
+ return true;
+
+ error_return:
+ if (contents == NULL)
+ free (contents);
+ return false;
+}
+\f
+asymbol *
+_bfd_elf_make_empty_symbol (abfd)
+ bfd *abfd;
+{
+ elf_symbol_type *newsym;
+
+ newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
+ if (!newsym)
+ return NULL;
+ else
+ {
+ newsym->symbol.the_bfd = abfd;
+ return &newsym->symbol;
+ }
+}
+
+void
+_bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
+ bfd *ignore_abfd;
+ asymbol *symbol;
+ symbol_info *ret;
+{
+ bfd_symbol_info (symbol, ret);
+}
+
+/* Return whether a symbol name implies a local symbol. Most targets
+ use this function for the is_local_label_name entry point, but some
+ override it. */
+
+boolean
+_bfd_elf_is_local_label_name (abfd, name)
+ bfd *abfd;
+ const char *name;
+{
+ /* Normal local symbols start with ``.L''. */
+ if (name[0] == '.' && name[1] == 'L')
+ return true;
+
+ /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
+ DWARF debugging symbols starting with ``..''. */
+ if (name[0] == '.' && name[1] == '.')
+ return true;
+
+ /* gcc will sometimes generate symbols beginning with ``_.L_'' when
+ emitting DWARF debugging output. I suspect this is actually a
+ small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
+ ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
+ underscore to be emitted on some ELF targets). For ease of use,
+ we treat such symbols as local. */
+ if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
+ return true;
+
+ return false;
+}
+
+alent *
+_bfd_elf_get_lineno (ignore_abfd, symbol)
+ bfd *ignore_abfd;
+ asymbol *symbol;
+{
+ abort ();
+ return NULL;
+}
+
+boolean
+_bfd_elf_set_arch_mach (abfd, arch, machine)
+ bfd *abfd;
+ enum bfd_architecture arch;
+ unsigned long machine;
+{
+ /* If this isn't the right architecture for this backend, and this
+ isn't the generic backend, fail. */
+ if (arch != get_elf_backend_data (abfd)->arch
+ && arch != bfd_arch_unknown
+ && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
+ return false;
+
+ return bfd_default_set_arch_mach (abfd, arch, machine);
+}
+
+/* Find the nearest line to a particular section and offset, for error
+ reporting. */
+
+boolean
+_bfd_elf_find_nearest_line (abfd,
+ section,
+ symbols,
+ offset,
+ filename_ptr,
+ functionname_ptr,
+ line_ptr)
+ bfd *abfd;
+ asection *section;
+ asymbol **symbols;
+ bfd_vma offset;
+ CONST char **filename_ptr;
+ CONST char **functionname_ptr;
+ unsigned int *line_ptr;
+{
+ boolean found;
+ const char *filename;
+ asymbol *func;
+ bfd_vma low_func;
+ asymbol **p;
+
+ if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
+ &found, filename_ptr,
+ functionname_ptr, line_ptr,
+ &elf_tdata (abfd)->line_info))
+ return false;
+ if (found)
+ return true;
+
+ if (symbols == NULL)
+ return false;
+
+ filename = NULL;
+ func = NULL;
+ low_func = 0;
+
+ for (p = symbols; *p != NULL; p++)
+ {
+ elf_symbol_type *q;
+
+ q = (elf_symbol_type *) *p;
+
+ if (bfd_get_section (&q->symbol) != section)
+ continue;
+
+ switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
+ {
+ default:
+ break;
+ case STT_FILE:
+ filename = bfd_asymbol_name (&q->symbol);
+ break;
+ case STT_FUNC:
+ if (q->symbol.section == section
+ && q->symbol.value >= low_func
+ && q->symbol.value <= offset)
+ {
+ func = (asymbol *) q;
+ low_func = q->symbol.value;
+ }
+ break;
+ }
+ }
+
+ if (func == NULL)
+ return false;
+
+ *filename_ptr = filename;
+ *functionname_ptr = bfd_asymbol_name (func);
+ *line_ptr = 0;
+ return true;
+}
+
+int
+_bfd_elf_sizeof_headers (abfd, reloc)
+ bfd *abfd;
+ boolean reloc;
+{
+ int ret;
+
+ ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
+ if (! reloc)
+ ret += get_program_header_size (abfd);
+ return ret;
+}
+
+boolean
+_bfd_elf_set_section_contents (abfd, section, location, offset, count)
+ bfd *abfd;
+ sec_ptr section;
+ PTR location;
+ file_ptr offset;
+ bfd_size_type count;
+{
+ Elf_Internal_Shdr *hdr;
+
+ if (! abfd->output_has_begun
+ && ! _bfd_elf_compute_section_file_positions (abfd,
+ (struct bfd_link_info *) NULL))
+ return false;
+
+ hdr = &elf_section_data (section)->this_hdr;
+
+ if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
+ return false;
+ if (bfd_write (location, 1, count, abfd) != count)
+ return false;
+
+ return true;
+}
+
+void
+_bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
+ bfd *abfd;
+ arelent *cache_ptr;
+ Elf_Internal_Rela *dst;
+{
+ abort ();
+}
+
+#if 0
+void
+_bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
+ bfd *abfd;
+ arelent *cache_ptr;
+ Elf_Internal_Rel *dst;
+{
+ abort ();
+}
+#endif
+
+/* Try to convert a non-ELF reloc into an ELF one. */
+
+boolean
+_bfd_elf_validate_reloc (abfd, areloc)
+ bfd *abfd;
+ arelent *areloc;
+{
+ /* Check whether we really have an ELF howto. */
+
+ if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
+ {
+ bfd_reloc_code_real_type code;
+ reloc_howto_type *howto;
+
+ /* Alien reloc: Try to determine its type to replace it with an
+ equivalent ELF reloc. */
+
+ if (areloc->howto->pc_relative)
+ {
+ switch (areloc->howto->bitsize)
+ {
+ case 8:
+ code = BFD_RELOC_8_PCREL;
+ break;
+ case 12:
+ code = BFD_RELOC_12_PCREL;
+ break;
+ case 16:
+ code = BFD_RELOC_16_PCREL;
+ break;
+ case 24:
+ code = BFD_RELOC_24_PCREL;
+ break;
+ case 32:
+ code = BFD_RELOC_32_PCREL;
+ break;
+ case 64:
+ code = BFD_RELOC_64_PCREL;
+ break;
+ default:
+ goto fail;
+ }
+
+ howto = bfd_reloc_type_lookup (abfd, code);
+
+ if (areloc->howto->pcrel_offset != howto->pcrel_offset)
+ {
+ if (howto->pcrel_offset)
+ areloc->addend += areloc->address;
+ else
+ areloc->addend -= areloc->address; /* addend is unsigned!! */
+ }
+ }
+ else
+ {
+ switch (areloc->howto->bitsize)
+ {
+ case 8:
+ code = BFD_RELOC_8;
+ break;
+ case 14:
+ code = BFD_RELOC_14;
+ break;
+ case 16:
+ code = BFD_RELOC_16;
+ break;
+ case 26:
+ code = BFD_RELOC_26;
+ break;
+ case 32:
+ code = BFD_RELOC_32;
+ break;
+ case 64:
+ code = BFD_RELOC_64;
+ break;
+ default:
+ goto fail;
+ }
+
+ howto = bfd_reloc_type_lookup (abfd, code);
+ }
+
+ if (howto)
+ areloc->howto = howto;
+ else
+ goto fail;
+ }
+
+ return true;
+
+ fail:
+ (*_bfd_error_handler)
+ ("%s: unsupported relocation type %s",
+ bfd_get_filename (abfd), areloc->howto->name);
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+}
projects / deliverable / binutils-gdb.git / blobdiff