mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-25 19:14:52 +08:00
d01cd8fc75
elf.c: Remove extraneous paren from core_prpsinfo and core_prpstatus macros, rename core_prpstatus to core_prstatus. Replace references to old section "size" member with new "_raw_size" member. Implement elf_make_empty_symbol, which is now used.
1419 lines
42 KiB
C
1419 lines
42 KiB
C
/* 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".
|
||
|
||
This file is part of BFD, the Binary File Descriptor library.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
|
||
/****************************************
|
||
|
||
WARNING
|
||
|
||
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.
|
||
|
||
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.
|
||
|
||
fnf@cygnus.com
|
||
|
||
*****************************************/
|
||
|
||
|
||
/* Problems and other issues to resolve.
|
||
|
||
(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.
|
||
|
||
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".
|
||
|
||
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)
|
||
|
||
*/
|
||
|
||
#include "bfd.h"
|
||
#include "sysdep.h"
|
||
#include "libbfd.h"
|
||
#include "obstack.h"
|
||
#include "elf/common.h"
|
||
#include "elf/internal.h"
|
||
#include "elf/external.h"
|
||
|
||
#ifdef HAVE_PROCFS /* Some core file support requires host /proc files */
|
||
#include <sys/procfs.h>
|
||
#else
|
||
#define bfd_prstatus(abfd, descdata, descsz, filepos) /* Define away */
|
||
#define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */
|
||
#define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */
|
||
#endif
|
||
|
||
/* Forward data declarations */
|
||
|
||
extern bfd_target elf_little_vec, elf_big_vec;
|
||
|
||
/* Currently the elf_symbol_type struct just contains the generic bfd
|
||
symbol structure. */
|
||
|
||
typedef struct
|
||
{
|
||
asymbol symbol;
|
||
} elf_symbol_type;
|
||
|
||
/* Some private data is stashed away for future use using the tdata pointer
|
||
in the bfd structure. This information is different for ELF core files
|
||
and other ELF files. */
|
||
|
||
typedef struct elf_core_tdata_struct
|
||
{
|
||
void *prstatus; /* The raw /proc prstatus structure */
|
||
void *prpsinfo; /* The raw /proc prpsinfo structure */
|
||
} elf_core_tdata;
|
||
|
||
#define core_prpsinfo(bfd) (((bfd)->tdata.elf_core_data) -> prpsinfo)
|
||
#define core_prstatus(bfd) (((bfd)->tdata.elf_core_data) -> prstatus)
|
||
|
||
|
||
typedef struct elf_obj_tdata_struct
|
||
{
|
||
file_ptr symtab_filepos; /* Offset to start of ELF symtab section */
|
||
long symtab_filesz; /* Size of ELF symtab section */
|
||
file_ptr strtab_filepos; /* Offset to start of ELF string tbl section */
|
||
long strtab_filesz; /* Size of ELF string tbl section */
|
||
} elf_obj_tdata;
|
||
|
||
#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
|
||
#define elf_symtab_filepos(bfd) (elf_tdata(bfd) -> symtab_filepos)
|
||
#define elf_symtab_filesz(bfd) (elf_tdata(bfd) -> symtab_filesz)
|
||
#define elf_strtab_filepos(bfd) (elf_tdata(bfd) -> strtab_filepos)
|
||
#define elf_strtab_filesz(bfd) (elf_tdata(bfd) -> strtab_filesz)
|
||
|
||
/* Translate an ELF symbol in external format into an ELF symbol in internal
|
||
format. */
|
||
|
||
static void
|
||
DEFUN(elf_swap_symbol_in,(abfd, src, dst),
|
||
bfd *abfd AND
|
||
Elf_External_Sym *src AND
|
||
Elf_Internal_Sym *dst)
|
||
{
|
||
dst -> st_name = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_name);
|
||
dst -> st_value = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_value);
|
||
dst -> st_size = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_size);
|
||
dst -> st_info = bfd_h_get_8 (abfd, (bfd_byte *) src -> st_info);
|
||
dst -> st_other = bfd_h_get_8 (abfd, (bfd_byte *) src -> st_other);
|
||
dst -> st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src -> st_shndx);
|
||
}
|
||
|
||
|
||
/* Translate an ELF file header in external format into an ELF file header in
|
||
internal format. */
|
||
|
||
static void
|
||
DEFUN(elf_swap_ehdr_in,(abfd, src, dst),
|
||
bfd *abfd AND
|
||
Elf_External_Ehdr *src AND
|
||
Elf_Internal_Ehdr *dst)
|
||
{
|
||
memcpy (dst -> e_ident, src -> 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. */
|
||
|
||
static void
|
||
DEFUN(elf_swap_shdr_in,(abfd, src, dst),
|
||
bfd *abfd AND
|
||
Elf_External_Shdr *src AND
|
||
Elf_Internal_Shdr *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);
|
||
}
|
||
|
||
|
||
/* Translate an ELF program header table entry in external format into an
|
||
ELF program header table entry in internal format. */
|
||
|
||
static void
|
||
DEFUN(elf_swap_phdr_in,(abfd, src, dst),
|
||
bfd *abfd AND
|
||
Elf_External_Phdr *src AND
|
||
Elf_Internal_Phdr *dst)
|
||
{
|
||
dst -> p_type = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_type);
|
||
dst -> p_offset = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_offset);
|
||
dst -> p_vaddr = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_vaddr);
|
||
dst -> p_paddr = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_paddr);
|
||
dst -> p_filesz = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_filesz);
|
||
dst -> p_memsz = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_memsz);
|
||
dst -> p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_flags);
|
||
dst -> p_align = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_align);
|
||
}
|
||
|
||
|
||
/* Create a new bfd section from an ELF section header. */
|
||
|
||
static boolean
|
||
DEFUN(bfd_section_from_shdr, (abfd, hdr, shstrtab),
|
||
bfd *abfd AND
|
||
Elf_Internal_Shdr *hdr AND
|
||
char *shstrtab)
|
||
{
|
||
asection *newsect;
|
||
char *name;
|
||
|
||
name = hdr -> sh_name ? shstrtab + hdr -> sh_name : "unnamed";
|
||
newsect = bfd_make_section (abfd, name);
|
||
newsect -> vma = hdr -> sh_addr;
|
||
newsect -> _raw_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)
|
||
{
|
||
newsect -> flags |= SEC_ALLOC;
|
||
if (hdr -> sh_type != SHT_NOBITS)
|
||
{
|
||
newsect -> flags |= SEC_LOAD;
|
||
}
|
||
}
|
||
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 */
|
||
}
|
||
else
|
||
{
|
||
newsect -> flags |= SEC_DATA;
|
||
}
|
||
if (hdr -> sh_type == SHT_SYMTAB)
|
||
{
|
||
abfd -> flags |= HAS_SYMS;
|
||
}
|
||
|
||
return (true);
|
||
}
|
||
|
||
/* 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.
|
||
|
||
*/
|
||
|
||
static boolean
|
||
DEFUN(bfd_section_from_phdr, (abfd, hdr, index),
|
||
bfd *abfd AND
|
||
Elf_Internal_Phdr *hdr AND
|
||
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);
|
||
(void) strcpy (name, namebuf);
|
||
newsect = bfd_make_section (abfd, name);
|
||
newsect -> vma = hdr -> p_vaddr;
|
||
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);
|
||
(void) strcpy (name, namebuf);
|
||
newsect = bfd_make_section (abfd, name);
|
||
newsect -> vma = hdr -> p_vaddr + 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);
|
||
}
|
||
|
||
#ifdef HAVE_PROCFS
|
||
|
||
static void
|
||
DEFUN(bfd_prstatus,(abfd, descdata, descsz, filepos),
|
||
bfd *abfd AND
|
||
char *descdata AND
|
||
int descsz AND
|
||
long filepos)
|
||
{
|
||
asection *newsect;
|
||
|
||
if (descsz == sizeof (prstatus_t))
|
||
{
|
||
newsect = bfd_make_section (abfd, ".reg");
|
||
newsect -> _raw_size = sizeof (gregset_t);
|
||
newsect -> filepos = filepos + (long) (((prstatus_t *)0) -> pr_reg);
|
||
newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS;
|
||
newsect -> alignment_power = 2;
|
||
if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL)
|
||
{
|
||
memcpy (core_prstatus (abfd), descdata, descsz);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Stash a copy of the prpsinfo structure away for future use. */
|
||
|
||
static void
|
||
DEFUN(bfd_prpsinfo,(abfd, descdata, descsz, filepos),
|
||
bfd *abfd AND
|
||
char *descdata AND
|
||
int descsz AND
|
||
long filepos)
|
||
{
|
||
asection *newsect;
|
||
|
||
if (descsz == sizeof (prpsinfo_t))
|
||
{
|
||
if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) != NULL)
|
||
{
|
||
bcopy (descdata, core_prpsinfo (abfd), descsz);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
DEFUN(bfd_fpregset,(abfd, descdata, descsz, filepos),
|
||
bfd *abfd AND
|
||
char *descdata AND
|
||
int descsz AND
|
||
long filepos)
|
||
{
|
||
asection *newsect;
|
||
|
||
if (descsz == sizeof (fpregset_t))
|
||
{
|
||
newsect = bfd_make_section (abfd, ".reg2");
|
||
newsect -> _raw_size = sizeof (fpregset_t);
|
||
newsect -> filepos = filepos;
|
||
newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS;
|
||
newsect -> alignment_power = 2;
|
||
}
|
||
}
|
||
|
||
#endif /* HAVE_PROCFS */
|
||
|
||
/* Return a pointer to the args (including the command name) that were
|
||
seen by the program that generated the core dump. Note that for
|
||
some reason, a spurious space is tacked onto the end of the args
|
||
in some (at least one anyway) implementations, so strip it off if
|
||
it exists. */
|
||
|
||
char *
|
||
DEFUN(elf_core_file_failing_command, (abfd),
|
||
bfd *abfd)
|
||
{
|
||
#ifdef HAVE_PROCFS
|
||
if (core_prpsinfo (abfd))
|
||
{
|
||
prpsinfo_t *p = core_prpsinfo (abfd);
|
||
char *scan = p -> pr_psargs;
|
||
while (*scan++) {;}
|
||
scan -= 2;
|
||
if ((scan > p -> pr_psargs) && (*scan == ' '))
|
||
{
|
||
*scan = '\000';
|
||
}
|
||
return (p -> pr_psargs);
|
||
}
|
||
#endif
|
||
return (NULL);
|
||
}
|
||
|
||
/* Return the number of the signal that caused the core dump. Presumably,
|
||
since we have a core file, we got a signal of some kind, so don't bother
|
||
checking the other process status fields, just return the signal number.
|
||
*/
|
||
|
||
static int
|
||
DEFUN(elf_core_file_failing_signal, (abfd),
|
||
bfd *abfd)
|
||
{
|
||
#ifdef HAVE_PROCFS
|
||
if (core_prstatus (abfd))
|
||
{
|
||
return (((prstatus_t *)(core_prstatus (abfd))) -> pr_cursig);
|
||
}
|
||
#endif
|
||
return (-1);
|
||
}
|
||
|
||
/* Check to see if the core file could reasonably be expected to have
|
||
come for the current executable file. Note that by default we return
|
||
true unless we find something that indicates that there might be a
|
||
problem.
|
||
*/
|
||
|
||
static boolean
|
||
DEFUN(elf_core_file_matches_executable_p, (core_bfd, exec_bfd),
|
||
bfd *core_bfd AND
|
||
bfd *exec_bfd)
|
||
{
|
||
#ifdef HAVE_PROCFS
|
||
char *corename;
|
||
char *execname;
|
||
#endif
|
||
|
||
/* First, xvecs must match since both are ELF files for the same target. */
|
||
|
||
if (core_bfd->xvec != exec_bfd->xvec)
|
||
{
|
||
bfd_error = system_call_error;
|
||
return (false);
|
||
}
|
||
|
||
#ifdef HAVE_PROCFS
|
||
|
||
/* If no prpsinfo, just return true. Otherwise, grab the last component
|
||
of the exec'd pathname from the prpsinfo. */
|
||
|
||
if (core_prpsinfo (core_bfd))
|
||
{
|
||
corename = (((struct prpsinfo *) core_prpsinfo (core_bfd)) -> pr_fname);
|
||
}
|
||
else
|
||
{
|
||
return (true);
|
||
}
|
||
|
||
/* Find the last component of the executable pathname. */
|
||
|
||
if ((execname = strrchr (exec_bfd -> filename, '/')) != NULL)
|
||
{
|
||
execname++;
|
||
}
|
||
else
|
||
{
|
||
execname = (char *) exec_bfd -> filename;
|
||
}
|
||
|
||
/* See if they match */
|
||
|
||
return (strcmp (execname, corename) ? false : true);
|
||
|
||
#else
|
||
|
||
return (true);
|
||
|
||
#endif /* HAVE_PROCFS */
|
||
}
|
||
|
||
/* ELF core files contain a segment of type PT_NOTE, that holds much of
|
||
the information that would normally be available from the /proc interface
|
||
for the process, at the time the process dumped core. Currently this
|
||
includes copies of the prstatus, prpsinfo, and fpregset structures.
|
||
|
||
Since these structures are potentially machine dependent in size and
|
||
ordering, bfd provides two levels of support for them. The first level,
|
||
available on all machines since it does not require that the host
|
||
have /proc support or the relevant include files, is to create a bfd
|
||
section for each of the prstatus, prpsinfo, and fpregset structures,
|
||
without any interpretation of their contents. With just this support,
|
||
the bfd client will have to interpret the structures itself. Even with
|
||
/proc support, it might want these full structures for it's own reasons.
|
||
|
||
In the second level of support, where HAVE_PROCFS is defined, bfd will
|
||
pick apart the structures to gather some additional information that
|
||
clients may want, such as the general register set, the name of the
|
||
exec'ed file and its arguments, the signal (if any) that caused the
|
||
core dump, etc.
|
||
|
||
*/
|
||
|
||
static boolean
|
||
DEFUN(elf_corefile_note, (abfd, hdr),
|
||
bfd *abfd AND
|
||
Elf_Internal_Phdr *hdr)
|
||
{
|
||
Elf_External_Note *x_note_p; /* Elf note, external form */
|
||
Elf_Internal_Note i_note; /* Elf note, internal form */
|
||
char *buf = NULL; /* Entire note segment contents */
|
||
char *namedata; /* Name portion of the note */
|
||
char *descdata; /* Descriptor portion of the note */
|
||
char *sectname; /* Name to use for new section */
|
||
long filepos; /* File offset to descriptor data */
|
||
asection *newsect;
|
||
|
||
if (hdr -> p_filesz > 0
|
||
&& (buf = (char *)malloc(hdr -> p_filesz)) != NULL
|
||
&& bfd_seek (abfd, hdr -> p_offset, SEEK_SET) != -1L
|
||
&& bfd_read ((PTR) buf, hdr -> p_filesz, 1, abfd) == hdr -> p_filesz)
|
||
{
|
||
x_note_p = (Elf_External_Note *) buf;
|
||
while ((char *) x_note_p < (buf + hdr -> p_filesz))
|
||
{
|
||
i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p -> namesz);
|
||
i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p -> descsz);
|
||
i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p -> type);
|
||
namedata = x_note_p -> name;
|
||
descdata = namedata + BFD_ALIGN (i_note.namesz, 4);
|
||
filepos = hdr -> p_offset + (descdata - buf);
|
||
switch (i_note.type) {
|
||
case NT_PRSTATUS:
|
||
/* process descdata as prstatus info */
|
||
bfd_prstatus (abfd, descdata, i_note.descsz, filepos);
|
||
sectname = ".prstatus";
|
||
break;
|
||
case NT_FPREGSET:
|
||
/* process descdata as fpregset info */
|
||
bfd_fpregset (abfd, descdata, i_note.descsz, filepos);
|
||
sectname = ".fpregset";
|
||
break;
|
||
case NT_PRPSINFO:
|
||
/* process descdata as prpsinfo */
|
||
bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos);
|
||
sectname = ".prpsinfo";
|
||
break;
|
||
default:
|
||
/* Unknown descriptor, just ignore it. */
|
||
sectname = NULL;
|
||
break;
|
||
}
|
||
if (sectname != NULL)
|
||
{
|
||
newsect = bfd_make_section (abfd, sectname);
|
||
newsect -> _raw_size = i_note.descsz;
|
||
newsect -> filepos = filepos;
|
||
newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS;
|
||
newsect -> alignment_power = 2;
|
||
}
|
||
x_note_p = (Elf_External_Note *)
|
||
(descdata + BFD_ALIGN (i_note.descsz, 4));
|
||
}
|
||
}
|
||
if (buf != NULL)
|
||
{
|
||
free (buf);
|
||
}
|
||
return true;
|
||
|
||
}
|
||
|
||
|
||
/* 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 *
|
||
DEFUN(elf_read, (abfd, offset, size),
|
||
bfd *abfd AND
|
||
long offset AND
|
||
int size)
|
||
{
|
||
char *buf;
|
||
|
||
if ((buf = bfd_alloc (abfd, size)) == NULL)
|
||
{
|
||
bfd_error = no_memory;
|
||
return (NULL);
|
||
}
|
||
if (bfd_seek (abfd, offset, SEEK_SET) == -1)
|
||
{
|
||
bfd_error = system_call_error;
|
||
return (NULL);
|
||
}
|
||
if (bfd_read ((PTR) buf, size, 1, abfd) != size)
|
||
{
|
||
bfd_error = system_call_error;
|
||
return (NULL);
|
||
}
|
||
return (buf);
|
||
}
|
||
|
||
/* Begin processing a given object.
|
||
|
||
First we validate the file by reading in the ELF header and checking
|
||
the magic number.
|
||
|
||
*/
|
||
|
||
static bfd_target *
|
||
DEFUN (elf_object_p, (abfd), bfd *abfd)
|
||
{
|
||
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 */
|
||
Elf_Off offset; /* Temp place to stash file offsets */
|
||
|
||
/* Read in the ELF header in external format. */
|
||
|
||
if (bfd_read ((PTR) &x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
|
||
{
|
||
bfd_error = system_call_error;
|
||
return (NULL);
|
||
}
|
||
|
||
/* 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). */
|
||
|
||
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)
|
||
{
|
||
wrong:
|
||
bfd_error = wrong_format;
|
||
return (NULL);
|
||
}
|
||
|
||
/* FIXME, Check EI_VERSION here ! */
|
||
|
||
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 */
|
||
}
|
||
|
||
/* 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;
|
||
break;
|
||
case ELFDATANONE: /* No data encoding specified */
|
||
default: /* Unknown data encoding specified */
|
||
goto wrong;
|
||
}
|
||
|
||
/* Allocate an instance of the elf_obj_tdata structure and hook it up to
|
||
the tdata pointer in the bfd. */
|
||
|
||
if ((abfd -> tdata.elf_obj_data =
|
||
(elf_obj_tdata*) bfd_zalloc (abfd, sizeof (elf_obj_tdata)))
|
||
== NULL)
|
||
{
|
||
bfd_error = no_memory;
|
||
return (NULL);
|
||
}
|
||
|
||
/* Now that we know the byte order, swap in the rest of the header */
|
||
elf_swap_ehdr_in (abfd, &x_ehdr, &i_ehdr);
|
||
|
||
/* If there is no section header table, we're hosed. */
|
||
if (i_ehdr.e_shoff == 0)
|
||
goto wrong;
|
||
|
||
if (i_ehdr.e_type == ET_EXEC || i_ehdr.e_type == ET_DYN)
|
||
{
|
||
abfd -> flags |= EXEC_P;
|
||
}
|
||
|
||
/* 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 (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)
|
||
{
|
||
bfd_error = no_memory;
|
||
return (NULL);
|
||
}
|
||
if ((i_shdr = (Elf_Internal_Shdr *)
|
||
bfd_alloc (abfd, sizeof (*i_shdr) * i_ehdr.e_shnum)) == NULL)
|
||
{
|
||
bfd_error = no_memory;
|
||
return (NULL);
|
||
}
|
||
if (bfd_seek (abfd, i_ehdr.e_shoff, SEEK_SET) == -1)
|
||
{
|
||
bfd_error = system_call_error;
|
||
return (NULL);
|
||
}
|
||
for (shindex = 0; shindex < i_ehdr.e_shnum; shindex++)
|
||
{
|
||
if (bfd_read ((PTR) (x_shdr + shindex), sizeof (*x_shdr), 1, abfd)
|
||
!= sizeof (*x_shdr))
|
||
{
|
||
bfd_error = system_call_error;
|
||
return (NULL);
|
||
}
|
||
elf_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;
|
||
offset = i_shdr[i_ehdr.e_shstrndx].sh_offset;
|
||
if ((shstrtab = elf_read (abfd, offset, shstrtabsize)) == NULL)
|
||
{
|
||
return (NULL);
|
||
}
|
||
|
||
/* Once all of the section headers have been read and converted, we
|
||
can start processing them. Note that the first section header is
|
||
a dummy placeholder entry, so we ignore it.
|
||
|
||
We also watch for the symbol table section and remember the file
|
||
offset and section size for both the symbol table section and the
|
||
associated string table section. */
|
||
|
||
for (shindex = 1; shindex < i_ehdr.e_shnum; shindex++)
|
||
{
|
||
Elf_Internal_Shdr *hdr = i_shdr + shindex;
|
||
bfd_section_from_shdr (abfd, hdr, shstrtab);
|
||
if (hdr -> sh_type == SHT_SYMTAB)
|
||
{
|
||
elf_symtab_filepos(abfd) = hdr -> sh_offset;
|
||
elf_symtab_filesz(abfd) = hdr -> sh_size;
|
||
elf_strtab_filepos(abfd) = (i_shdr + hdr -> sh_link) -> sh_offset;
|
||
elf_strtab_filesz(abfd) = (i_shdr + hdr -> sh_link) -> sh_size;
|
||
}
|
||
}
|
||
|
||
/* Remember the entry point specified in the ELF file header. */
|
||
|
||
bfd_get_start_address (abfd) = i_ehdr.e_entry;
|
||
|
||
return (abfd->xvec);
|
||
}
|
||
|
||
/* Core files are simply standard ELF formatted files that partition
|
||
the file using the execution view of the file (program header table)
|
||
rather than the linking view. In fact, there is no section header
|
||
table in a core file.
|
||
|
||
The process status information (including the contents of the general
|
||
register set) and the floating point register set are stored in a
|
||
segment of type PT_NOTE. We handcraft a couple of extra bfd sections
|
||
that allow standard bfd access to the general registers (.reg) and the
|
||
floating point registers (.reg2).
|
||
|
||
*/
|
||
|
||
static bfd_target *
|
||
DEFUN (elf_core_file_p, (abfd), bfd *abfd)
|
||
{
|
||
Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
|
||
Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */
|
||
Elf_External_Phdr *x_phdr; /* Program header table, external form */
|
||
Elf_Internal_Phdr *i_phdr; /* Program header table, internal form */
|
||
int phindex;
|
||
|
||
/* Read in the ELF header in external format. */
|
||
|
||
if (bfd_read ((PTR) &x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
|
||
{
|
||
bfd_error = system_call_error;
|
||
return (NULL);
|
||
}
|
||
|
||
/* 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
|
||
program header table (FIXME: See comments re segments at top of this
|
||
file). */
|
||
|
||
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)
|
||
{
|
||
wrong:
|
||
bfd_error = wrong_format;
|
||
return (NULL);
|
||
}
|
||
|
||
/* FIXME, Check EI_VERSION here ! */
|
||
|
||
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 */
|
||
}
|
||
|
||
/* 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;
|
||
break;
|
||
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 */
|
||
elf_swap_ehdr_in (abfd, &x_ehdr, &i_ehdr);
|
||
|
||
/* If there is no program header, or the type is not a core file, then
|
||
we are hosed. */
|
||
if (i_ehdr.e_phoff == 0 || i_ehdr.e_type != ET_CORE)
|
||
goto wrong;
|
||
|
||
/* Allocate an instance of the elf_core_tdata structure and hook it up to
|
||
the tdata pointer in the bfd. */
|
||
|
||
if ((abfd -> tdata.elf_core_data =
|
||
(elf_core_tdata *) bfd_zalloc (abfd, sizeof (elf_core_tdata)))
|
||
== NULL)
|
||
{
|
||
bfd_error = no_memory;
|
||
return (NULL);
|
||
}
|
||
|
||
/* Allocate space for copies of the program header table in external
|
||
and internal form, seek to the program 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 program
|
||
header table entry actually matches the size recorded in the file. */
|
||
|
||
if (i_ehdr.e_phentsize != sizeof (*x_phdr))
|
||
goto wrong;
|
||
if ((x_phdr = (Elf_External_Phdr *)
|
||
bfd_alloc (abfd, sizeof (*x_phdr) * i_ehdr.e_phnum)) == NULL)
|
||
{
|
||
bfd_error = no_memory;
|
||
return (NULL);
|
||
}
|
||
if ((i_phdr = (Elf_Internal_Phdr *)
|
||
bfd_alloc (abfd, sizeof (*i_phdr) * i_ehdr.e_phnum)) == NULL)
|
||
{
|
||
bfd_error = no_memory;
|
||
return (NULL);
|
||
}
|
||
if (bfd_seek (abfd, i_ehdr.e_phoff, SEEK_SET) == -1)
|
||
{
|
||
bfd_error = system_call_error;
|
||
return (NULL);
|
||
}
|
||
for (phindex = 0; phindex < i_ehdr.e_phnum; phindex++)
|
||
{
|
||
if (bfd_read ((PTR) (x_phdr + phindex), sizeof (*x_phdr), 1, abfd)
|
||
!= sizeof (*x_phdr))
|
||
{
|
||
bfd_error = system_call_error;
|
||
return (NULL);
|
||
}
|
||
elf_swap_phdr_in (abfd, x_phdr + phindex, i_phdr + phindex);
|
||
}
|
||
|
||
/* Once all of the program headers have been read and converted, we
|
||
can start processing them. */
|
||
|
||
for (phindex = 0; phindex < i_ehdr.e_phnum; phindex++)
|
||
{
|
||
bfd_section_from_phdr (abfd, i_phdr + phindex, phindex);
|
||
if ((i_phdr + phindex) -> p_type == PT_NOTE)
|
||
{
|
||
elf_corefile_note (abfd, i_phdr + phindex);
|
||
}
|
||
}
|
||
|
||
/* Remember the entry point specified in the ELF file header. */
|
||
|
||
bfd_get_start_address (abfd) = i_ehdr.e_entry;
|
||
|
||
return (abfd->xvec);
|
||
}
|
||
|
||
static boolean
|
||
DEFUN (elf_mkobject, (abfd), bfd *abfd)
|
||
{
|
||
fprintf (stderr, "elf_mkobject unimplemented\n");
|
||
fflush (stderr);
|
||
abort ();
|
||
return (false);
|
||
}
|
||
|
||
static boolean
|
||
DEFUN (elf_write_object_contents, (abfd), bfd *abfd)
|
||
{
|
||
fprintf (stderr, "elf_write_object_contents unimplemented\n");
|
||
fflush (stderr);
|
||
abort ();
|
||
return (false);
|
||
}
|
||
|
||
/* Given an index of a section, retrieve a pointer to it. Note
|
||
that for our purposes, sections are indexed by {1, 2, ...} with
|
||
0 being an illegal index. */
|
||
|
||
static struct sec *
|
||
DEFUN (section_from_bfd_index, (abfd, index),
|
||
bfd *abfd AND
|
||
int index)
|
||
{
|
||
if (index > 0)
|
||
{
|
||
struct sec *answer = abfd -> sections;
|
||
while (--index > 0)
|
||
{
|
||
answer = answer -> next;
|
||
}
|
||
return (answer);
|
||
}
|
||
return (NULL);
|
||
}
|
||
|
||
static boolean
|
||
DEFUN (elf_slurp_symbol_table, (abfd), bfd *abfd)
|
||
{
|
||
int symcount; /* Number of external ELF symbols */
|
||
char *strtab; /* Buffer for raw ELF string table section */
|
||
asymbol *sym; /* Pointer to current bfd symbol */
|
||
asymbol *symbase; /* Buffer for generated bfd symbols */
|
||
asymbol **vec; /* Pointer to current bfd symbol pointer */
|
||
Elf_Internal_Sym i_sym;
|
||
Elf_External_Sym x_sym;
|
||
|
||
if (bfd_get_outsymbols (abfd) != NULL)
|
||
{
|
||
return (true);
|
||
}
|
||
|
||
/* Slurp in the string table. We will keep it around permanently, as
|
||
long as the bfd is in use, since we will end up setting up pointers
|
||
into it for the names of all the symbols. */
|
||
|
||
strtab = elf_read (abfd, elf_strtab_filepos(abfd), elf_strtab_filesz(abfd));
|
||
if (strtab == NULL)
|
||
{
|
||
return (false);
|
||
}
|
||
|
||
/* Read each raw ELF symbol, converting from external ELF form to
|
||
internal ELF form, and then using the information to create a
|
||
canonical bfd symbol table entry.
|
||
|
||
Note that be allocate the initial bfd canonical symbol buffer
|
||
based on a one-to-one mapping of the ELF symbols to canonical
|
||
symbols. However, it is likely that not all the ELF symbols will
|
||
be used, so there will be some space leftover at the end. Once
|
||
we know how many symbols we actual generate, we realloc the buffer
|
||
to the correct size and then build the pointer vector. */
|
||
|
||
if (bfd_seek (abfd, elf_symtab_filepos (abfd), SEEK_SET) == -1)
|
||
{
|
||
bfd_error = system_call_error;
|
||
return (false);
|
||
}
|
||
|
||
symcount = elf_symtab_filesz(abfd) / sizeof (Elf_External_Sym);
|
||
sym = symbase = (asymbol *) bfd_zalloc (abfd, symcount * sizeof (asymbol));
|
||
|
||
while (symcount-- > 0)
|
||
{
|
||
if (bfd_read ((PTR) &x_sym, sizeof (x_sym), 1, abfd) != sizeof (x_sym))
|
||
{
|
||
bfd_error = system_call_error;
|
||
return (false);
|
||
}
|
||
elf_swap_symbol_in (abfd, &x_sym, &i_sym);
|
||
if (i_sym.st_name > 0)
|
||
{
|
||
sym -> the_bfd = abfd;
|
||
sym -> name = strtab + i_sym.st_name;
|
||
sym -> value = i_sym.st_value;
|
||
if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV)
|
||
{
|
||
/* Note: This code depends upon there being an ordered
|
||
one-for-one mapping of ELF sections to bfd sections. */
|
||
sym -> section = section_from_bfd_index (abfd, i_sym.st_shndx);
|
||
}
|
||
else if (i_sym.st_shndx == SHN_ABS)
|
||
{
|
||
/* sym -> flags |= BSF_ABSOLUTE; OBSOLETE */
|
||
}
|
||
else if (i_sym.st_shndx == SHN_COMMON)
|
||
{
|
||
sym -> section = &bfd_com_section;
|
||
}
|
||
switch (ELF_ST_BIND (i_sym.st_info))
|
||
{
|
||
case STB_LOCAL:
|
||
sym -> flags |= BSF_LOCAL;
|
||
break;
|
||
case STB_GLOBAL:
|
||
sym -> flags |= (BSF_GLOBAL | BSF_EXPORT);
|
||
break;
|
||
case STB_WEAK:
|
||
sym -> flags |= BSF_WEAK;
|
||
break;
|
||
}
|
||
sym++;
|
||
}
|
||
}
|
||
|
||
bfd_get_symcount(abfd) = symcount = sym - symbase;
|
||
sym = symbase = (asymbol *)
|
||
bfd_realloc (abfd, symbase, symcount * sizeof (asymbol));
|
||
bfd_get_outsymbols(abfd) = vec = (asymbol **)
|
||
bfd_alloc (abfd, symcount * sizeof (asymbol *));
|
||
|
||
while (symcount-- > 0)
|
||
{
|
||
*vec++ = sym++;
|
||
}
|
||
|
||
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. */
|
||
|
||
static unsigned int
|
||
DEFUN (elf_get_symtab_upper_bound, (abfd), bfd *abfd)
|
||
{
|
||
unsigned int symtab_size = 0;
|
||
|
||
if (elf_slurp_symbol_table (abfd))
|
||
{
|
||
symtab_size = (bfd_get_symcount (abfd) + 1) * (sizeof (asymbol));
|
||
}
|
||
return (symtab_size);
|
||
}
|
||
|
||
static unsigned int
|
||
elf_get_reloc_upper_bound (abfd, asect)
|
||
bfd *abfd;
|
||
sec_ptr asect;
|
||
{
|
||
fprintf (stderr, "elf_get_reloc_upper_bound unimplemented\n");
|
||
fflush (stderr);
|
||
abort ();
|
||
return (0);
|
||
}
|
||
|
||
static unsigned int
|
||
elf_canonicalize_reloc (abfd, section, relptr, symbols)
|
||
bfd *abfd;
|
||
sec_ptr section;
|
||
arelent **relptr;
|
||
asymbol **symbols;
|
||
{
|
||
fprintf (stderr, "elf_canonicalize_reloc unimplemented\n");
|
||
fflush (stderr);
|
||
abort ();
|
||
return (0);
|
||
}
|
||
|
||
static unsigned int
|
||
DEFUN (elf_get_symtab, (abfd, alocation),
|
||
bfd *abfd AND
|
||
asymbol **alocation)
|
||
{
|
||
unsigned int symcount;
|
||
asymbol **vec;
|
||
|
||
if (!elf_slurp_symbol_table (abfd))
|
||
{
|
||
return (0);
|
||
}
|
||
else
|
||
{
|
||
symcount = bfd_get_symcount (abfd);
|
||
vec = bfd_get_outsymbols (abfd);
|
||
while (symcount-- > 0)
|
||
{
|
||
*alocation++ = *vec++;
|
||
}
|
||
*alocation++ = NULL;
|
||
return (bfd_get_symcount (abfd));
|
||
}
|
||
}
|
||
|
||
static asymbol *
|
||
DEFUN (elf_make_empty_symbol, (abfd),
|
||
bfd *abfd)
|
||
{
|
||
elf_symbol_type *new;
|
||
|
||
new = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
|
||
if (new == NULL)
|
||
{
|
||
bfd_error = no_memory;
|
||
return (NULL);
|
||
}
|
||
else
|
||
{
|
||
new -> symbol.the_bfd = abfd;
|
||
return (&new -> symbol);
|
||
}
|
||
}
|
||
|
||
static void
|
||
DEFUN (elf_print_symbol,(ignore_abfd, filep, symbol, how),
|
||
bfd *ignore_abfd AND
|
||
PTR filep AND
|
||
asymbol *symbol AND
|
||
bfd_print_symbol_type how)
|
||
{
|
||
fprintf (stderr, "elf_print_symbol unimplemented\n");
|
||
fflush (stderr);
|
||
abort ();
|
||
}
|
||
|
||
static alent *
|
||
DEFUN (elf_get_lineno,(ignore_abfd, symbol),
|
||
bfd *ignore_abfd AND
|
||
asymbol *symbol)
|
||
{
|
||
fprintf (stderr, "elf_get_lineno unimplemented\n");
|
||
fflush (stderr);
|
||
abort ();
|
||
return (NULL);
|
||
}
|
||
|
||
static boolean
|
||
DEFUN (elf_set_arch_mach,(abfd, arch, machine),
|
||
bfd *abfd AND
|
||
enum bfd_architecture arch AND
|
||
unsigned long machine)
|
||
{
|
||
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);
|
||
}
|
||
|
||
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);
|
||
}
|
||
|
||
static int
|
||
DEFUN (elf_sizeof_headers, (abfd, reloc),
|
||
bfd *abfd AND
|
||
boolean reloc)
|
||
{
|
||
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. */
|
||
|
||
/* Archives are generic or unimplemented. */
|
||
#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_write_armap (PROTO (boolean, (*), \
|
||
(bfd *arch, unsigned int elength, struct orl *map, unsigned int orl_count, \
|
||
int stridx))) bfd_false
|
||
|
||
/* Ordinary section reading and writing */
|
||
#define elf_new_section_hook _bfd_dummy_new_section_hook
|
||
#define elf_get_section_contents bfd_generic_get_section_contents
|
||
#define elf_set_section_contents bfd_generic_set_section_contents
|
||
#define elf_close_and_cleanup bfd_generic_close_and_cleanup
|
||
|
||
#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
|
||
#define elf_bfd_get_relocated_section_contents \
|
||
bfd_generic_get_relocated_section_contents
|
||
#define elf_bfd_relax_section bfd_generic_relax_section
|
||
bfd_target elf_big_vec =
|
||
{
|
||
/* name: identify kind of target */
|
||
"elf-big",
|
||
|
||
/* flavour: general indication about file */
|
||
bfd_target_elf_flavour,
|
||
|
||
/* 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, /* unknown format */
|
||
elf_object_p, /* assembler/linker output (object file) */
|
||
bfd_generic_archive_p, /* an archive */
|
||
elf_core_file_p /* a core file */
|
||
},
|
||
|
||
/* 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
|
||
};
|
||
|
||
bfd_target elf_little_vec =
|
||
{
|
||
/* name: identify kind of target */
|
||
"elf-little",
|
||
|
||
/* flavour: general indication about file */
|
||
bfd_target_elf_flavour,
|
||
|
||
/* 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, /* unknown format */
|
||
elf_object_p, /* assembler/linker output (object file) */
|
||
bfd_generic_archive_p, /* an archive */
|
||
elf_core_file_p /* a core file */
|
||
},
|
||
|
||
/* 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
|
||
};
|