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3565cf8fed
binutils-gdb/binutils/nlmconv.c
Nick Clifton 3565cf8fed Fixes for memory access violations triggered by running nlmconv on 
fuzzed binaries.

	PR binutils/17512
	* nlmconv.c (i386_mangle_relocs): Skip relocs without an
	associated symbol.
	(powerpc_mangle_relocs): Skip unrecognised relocs.  Check address
	range before applying a reloc.
2015-01-08 12:37:46 +00:00

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/* nlmconv.c -- NLM conversion program
Copyright (C) 1993-2015 Free Software Foundation, Inc.
This file is part of GNU Binutils.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
/* Written by Ian Lance Taylor <ian@cygnus.com>.
This program can be used to convert any appropriate object file
into a NetWare Loadable Module (an NLM). It will accept a linker
specification file which is identical to that accepted by the
NetWare linker, NLMLINK. */
/* AIX requires this to be the first thing in the file. */
#ifndef __GNUC__
# ifdef _AIX
#pragma alloca
#endif
#endif
#include "sysdep.h"
#include "bfd.h"
#include "libiberty.h"
#include "filenames.h"
#include "safe-ctype.h"
#include "ansidecl.h"
#include <time.h>
#include <assert.h>
#include "getopt.h"
/* Internal BFD NLM header. */
#include "libnlm.h"
#include "nlmconv.h"
#ifdef NLMCONV_ALPHA
#include "coff/sym.h"
#include "coff/ecoff.h"
#endif
#include "bucomm.h"
/* If strerror is just a macro, we want to use the one from libiberty
since it will handle undefined values. */
#undef strerror
extern char *strerror (int);
#ifndef SEEK_SET
#define SEEK_SET 0
#endif
#ifndef R_OK
#define R_OK 4
#define W_OK 2
#define X_OK 1
#endif
/* Global variables. */
/* The name used to invoke the program. */
char *program_name;
/* Local variables. */
/* Whether to print out debugging information (currently just controls
whether it prints the linker command if there is one). */
static int debug;
/* The symbol table. */
static asymbol **symbols;
/* A section we create in the output file to hold pointers to where
the sections of the input file end up. We will put a pointer to
this section in the NLM header. These is an entry for each input
section. The format is
null terminated section name
zeroes to adjust to 4 byte boundary
4 byte section data file pointer
4 byte section size
We don't need a version number. The way we find this information
is by finding a stamp in the NLM header information. If we need to
change the format of this information, we can simply change the
stamp. */
static asection *secsec;
/* A temporary file name to be unlinked on exit. Actually, for most
errors, we leave it around. It's not clear whether that is helpful
or not. */
static char *unlink_on_exit;
/* The list of long options. */
static struct option long_options[] =
{
{ "debug", no_argument, 0, 'd' },
{ "header-file", required_argument, 0, 'T' },
{ "help", no_argument, 0, 'h' },
{ "input-target", required_argument, 0, 'I' },
{ "input-format", required_argument, 0, 'I' }, /* Obsolete */
{ "linker", required_argument, 0, 'l' },
{ "output-target", required_argument, 0, 'O' },
{ "output-format", required_argument, 0, 'O' }, /* Obsolete */
{ "version", no_argument, 0, 'V' },
{ NULL, no_argument, 0, 0 }
};
/* Local routines. */
int main (int, char **);
static void show_usage (FILE *, int);
static const char *select_output_format
(enum bfd_architecture, unsigned long, bfd_boolean);
static void setup_sections (bfd *, asection *, void *);
static void copy_sections (bfd *, asection *, void *);
static void mangle_relocs
(bfd *, asection *, arelent ***, long *, char *, bfd_size_type);
static void default_mangle_relocs
(bfd *, asection *, arelent ***, long *, char *, bfd_size_type);
static char *link_inputs (struct string_list *, char *, char *);
#ifdef NLMCONV_I386
static void i386_mangle_relocs (bfd *, asection *, arelent ***, long *, char *, bfd_size_type);
#endif
#ifdef NLMCONV_ALPHA
static void alpha_mangle_relocs (bfd *, asection *, arelent ***, long *, char *, bfd_size_type);
#endif
#ifdef NLMCONV_POWERPC
static void powerpc_build_stubs (bfd *, bfd *, asymbol ***, long *);
static void powerpc_resolve_stubs (bfd *, bfd *);
static void powerpc_mangle_relocs (bfd *, asection *, arelent ***, long *, char *, bfd_size_type);
#endif
/* The main routine. */
int
main (int argc, char **argv)
{
int opt;
char *input_file = NULL;
const char *input_format = NULL;
const char *output_format = NULL;
const char *header_file = NULL;
char *ld_arg = NULL;
Nlm_Internal_Fixed_Header fixed_hdr_struct;
Nlm_Internal_Variable_Header var_hdr_struct;
Nlm_Internal_Version_Header version_hdr_struct;
Nlm_Internal_Copyright_Header copyright_hdr_struct;
Nlm_Internal_Extended_Header extended_hdr_struct;
bfd *inbfd;
bfd *outbfd;
asymbol **newsyms, **outsyms;
long symcount, newsymalloc, newsymcount;
long symsize;
asection *text_sec, *bss_sec, *data_sec;
bfd_vma vma;
bfd_size_type align;
asymbol *endsym;
long i;
char inlead, outlead;
bfd_boolean gotstart, gotexit, gotcheck;
struct stat st;
FILE *custom_data = NULL;
FILE *help_data = NULL;
FILE *message_data = NULL;
FILE *rpc_data = NULL;
FILE *shared_data = NULL;
size_t custom_size = 0;
size_t help_size = 0;
size_t message_size = 0;
size_t module_size = 0;
size_t rpc_size = 0;
asection *custom_section = NULL;
asection *help_section = NULL;
asection *message_section = NULL;
asection *module_section = NULL;
asection *rpc_section = NULL;
asection *shared_section = NULL;
bfd *sharedbfd;
size_t shared_offset = 0;
size_t shared_size = 0;
static Nlm_Internal_Fixed_Header sharedhdr;
int len;
char *modname;
char **matching;
#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
setlocale (LC_MESSAGES, "");
#endif
#if defined (HAVE_SETLOCALE)
setlocale (LC_CTYPE, "");
#endif
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
program_name = argv[0];
xmalloc_set_program_name (program_name);
expandargv (&argc, &argv);
bfd_init ();
set_default_bfd_target ();
while ((opt = getopt_long (argc, argv, "dHhI:l:O:T:Vv", long_options,
(int *) NULL))
!= EOF)
{
switch (opt)
{
case 'd':
debug = 1;
break;
case 'H':
case 'h':
show_usage (stdout, 0);
break;
case 'I':
input_format = optarg;
break;
case 'l':
ld_arg = optarg;
break;
case 'O':
output_format = optarg;
break;
case 'T':
header_file = optarg;
break;
case 'v':
case 'V':
print_version ("nlmconv");
break;
case 0:
break;
default:
show_usage (stderr, 1);
break;
}
}
/* The input and output files may be named on the command line. */
output_file = NULL;
if (optind < argc)
{
input_file = argv[optind];
++optind;
if (optind < argc)
{
output_file = argv[optind];
++optind;
if (optind < argc)
show_usage (stderr, 1);
if (filename_cmp (input_file, output_file) == 0)
{
fatal (_("input and output files must be different"));
}
}
}
/* Initialize the header information to default values. */
fixed_hdr = &fixed_hdr_struct;
memset ((void *) &fixed_hdr_struct, 0, sizeof fixed_hdr_struct);
var_hdr = &var_hdr_struct;
memset ((void *) &var_hdr_struct, 0, sizeof var_hdr_struct);
version_hdr = &version_hdr_struct;
memset ((void *) &version_hdr_struct, 0, sizeof version_hdr_struct);
copyright_hdr = &copyright_hdr_struct;
memset ((void *) &copyright_hdr_struct, 0, sizeof copyright_hdr_struct);
extended_hdr = &extended_hdr_struct;
memset ((void *) &extended_hdr_struct, 0, sizeof extended_hdr_struct);
check_procedure = NULL;
custom_file = NULL;
debug_info = FALSE;
exit_procedure = "_Stop";
export_symbols = NULL;
map_file = NULL;
full_map = FALSE;
help_file = NULL;
import_symbols = NULL;
message_file = NULL;
modules = NULL;
sharelib_file = NULL;
start_procedure = "_Prelude";
verbose = FALSE;
rpc_file = NULL;
parse_errors = 0;
/* Parse the header file (if there is one). */
if (header_file != NULL)
{
if (! nlmlex_file (header_file)
|| yyparse () != 0
|| parse_errors != 0)
exit (1);
}
if (input_files != NULL)
{
if (input_file != NULL)
{
fatal (_("input file named both on command line and with INPUT"));
}
if (input_files->next == NULL)
input_file = input_files->string;
else
input_file = link_inputs (input_files, ld_arg, map_file);
}
else if (input_file == NULL)
{
non_fatal (_("no input file"));
show_usage (stderr, 1);
}
inbfd = bfd_openr (input_file, input_format);
if (inbfd == NULL)
bfd_fatal (input_file);
if (! bfd_check_format_matches (inbfd, bfd_object, &matching))
{
bfd_nonfatal (input_file);
if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
{
list_matching_formats (matching);
free (matching);
}
exit (1);
}
if (output_format == NULL)
output_format = select_output_format (bfd_get_arch (inbfd),
bfd_get_mach (inbfd),
bfd_big_endian (inbfd));
assert (output_format != NULL);
/* Use the output file named on the command line if it exists.
Otherwise use the file named in the OUTPUT statement. */
if (output_file == NULL)
{
non_fatal (_("no name for output file"));
show_usage (stderr, 1);
}
outbfd = bfd_openw (output_file, output_format);
if (outbfd == NULL)
bfd_fatal (output_file);
if (! bfd_set_format (outbfd, bfd_object))
bfd_fatal (output_file);
assert (bfd_get_flavour (outbfd) == bfd_target_nlm_flavour);
/* XXX: Should we accept the unknown bfd format here ? */
if (bfd_arch_get_compatible (inbfd, outbfd, TRUE) == NULL)
non_fatal (_("warning: input and output formats are not compatible"));
/* Move the values read from the command file into outbfd. */
*nlm_fixed_header (outbfd) = fixed_hdr_struct;
*nlm_variable_header (outbfd) = var_hdr_struct;
*nlm_version_header (outbfd) = version_hdr_struct;
*nlm_copyright_header (outbfd) = copyright_hdr_struct;
*nlm_extended_header (outbfd) = extended_hdr_struct;
/* Start copying the input BFD to the output BFD. */
if (! bfd_set_file_flags (outbfd, bfd_get_file_flags (inbfd)))
bfd_fatal (bfd_get_filename (outbfd));
symsize = bfd_get_symtab_upper_bound (inbfd);
if (symsize < 0)
bfd_fatal (input_file);
symbols = (asymbol **) xmalloc (symsize);
symcount = bfd_canonicalize_symtab (inbfd, symbols);
if (symcount < 0)
bfd_fatal (input_file);
/* Make sure we have a .bss section. */
bss_sec = bfd_get_section_by_name (outbfd, NLM_UNINITIALIZED_DATA_NAME);
if (bss_sec == NULL)
{
bss_sec = bfd_make_section_with_flags (outbfd,
NLM_UNINITIALIZED_DATA_NAME,
SEC_ALLOC);
if (bss_sec == NULL
|| ! bfd_set_section_alignment (outbfd, bss_sec, 1))
bfd_fatal (_("make .bss section"));
}
/* We store the original section names in the .nlmsections section,
so that programs which understand it can resurrect the original
sections from the NLM. We will put a pointer to .nlmsections in
the NLM header area. */
secsec = bfd_make_section_with_flags (outbfd, ".nlmsections",
SEC_HAS_CONTENTS);
if (secsec == NULL)
bfd_fatal (_("make .nlmsections section"));
#ifdef NLMCONV_POWERPC
/* For PowerPC NetWare we need to build stubs for calls to undefined
symbols. Because each stub requires an entry in the TOC section
which must be at the same location as other entries in the TOC
section, we must do this before determining where the TOC section
goes in setup_sections. */
if (bfd_get_arch (inbfd) == bfd_arch_powerpc)
powerpc_build_stubs (inbfd, outbfd, &symbols, &symcount);
#endif
/* Set up the sections. */
bfd_map_over_sections (inbfd, setup_sections, (void *) outbfd);
text_sec = bfd_get_section_by_name (outbfd, NLM_CODE_NAME);
/* The .bss section immediately follows the .data section. */
data_sec = bfd_get_section_by_name (outbfd, NLM_INITIALIZED_DATA_NAME);
if (data_sec != NULL)
{
bfd_size_type add;
vma = bfd_get_section_size (data_sec);
align = 1 << bss_sec->alignment_power;
add = ((vma + align - 1) &~ (align - 1)) - vma;
vma += add;
if (! bfd_set_section_vma (outbfd, bss_sec, vma))
bfd_fatal (_("set .bss vma"));
if (add != 0)
{
bfd_size_type data_size;
data_size = bfd_get_section_size (data_sec);
if (! bfd_set_section_size (outbfd, data_sec, data_size + add))
bfd_fatal (_("set .data size"));
}
}
/* Adjust symbol information. */
inlead = bfd_get_symbol_leading_char (inbfd);
outlead = bfd_get_symbol_leading_char (outbfd);
gotstart = FALSE;
gotexit = FALSE;
gotcheck = FALSE;
newsymalloc = 10;
newsyms = (asymbol **) xmalloc (newsymalloc * sizeof (asymbol *));
newsymcount = 0;
endsym = NULL;
for (i = 0; i < symcount; i++)
{
asymbol *sym;
sym = symbols[i];
/* Add or remove a leading underscore. */
if (inlead != outlead)
{
if (inlead != '\0')
{
if (bfd_asymbol_name (sym)[0] == inlead)
{
if (outlead == '\0')
++sym->name;
else
{
char *new_name;
new_name = xmalloc (strlen (bfd_asymbol_name (sym)) + 1);
new_name[0] = outlead;
strcpy (new_name + 1, bfd_asymbol_name (sym) + 1);
sym->name = new_name;
}
}
}
else
{
char *new_name;
new_name = xmalloc (strlen (bfd_asymbol_name (sym)) + 2);
new_name[0] = outlead;
strcpy (new_name + 1, bfd_asymbol_name (sym));
sym->name = new_name;
}
}
/* NLM's have an uninitialized data section, but they do not
have a common section in the Unix sense. Move all common
symbols into the .bss section, and mark them as exported. */
if (bfd_is_com_section (bfd_get_section (sym)))
{
bfd_vma size = sym->value;
sym->section = bss_sec;
sym->value = bfd_get_section_size (bss_sec);
size += sym->value;
align = 1 << bss_sec->alignment_power;
size = (size + align - 1) & ~(align - 1);
bfd_set_section_size (outbfd, bss_sec, size);
sym->flags |= BSF_EXPORT | BSF_GLOBAL;
}
else if (bfd_get_section (sym)->output_section != NULL)
{
/* Move the symbol into the output section. */
sym->value += bfd_get_section (sym)->output_offset;
sym->section = bfd_get_section (sym)->output_section;
/* This is no longer a section symbol. */
sym->flags &=~ BSF_SECTION_SYM;
}
/* Force _edata and _end to be defined. This would normally be
done by the linker, but the manipulation of the common
symbols will confuse it. */
if ((sym->flags & BSF_DEBUGGING) == 0
&& bfd_asymbol_name (sym)[0] == '_'
&& bfd_is_und_section (bfd_get_section (sym)))
{
if (strcmp (bfd_asymbol_name (sym), "_edata") == 0)
{
sym->section = bss_sec;
sym->value = 0;
}
if (strcmp (bfd_asymbol_name (sym), "_end") == 0)
{
sym->section = bss_sec;
endsym = sym;
}
#ifdef NLMCONV_POWERPC
/* For PowerPC NetWare, we define __GOT0. This is the start
of the .got section. */
if (bfd_get_arch (inbfd) == bfd_arch_powerpc
&& strcmp (bfd_asymbol_name (sym), "__GOT0") == 0)
{
asection *got_sec;
got_sec = bfd_get_section_by_name (inbfd, ".got");
assert (got_sec != (asection *) NULL);
sym->value = got_sec->output_offset;
sym->section = got_sec->output_section;
}
#endif
}
/* If this is a global symbol, check the export list. */
if ((sym->flags & (BSF_EXPORT | BSF_GLOBAL)) != 0)
{
struct string_list *l;
int found_simple;
/* Unfortunately, a symbol can appear multiple times on the
export list, with and without prefixes. */
found_simple = 0;
for (l = export_symbols; l != NULL; l = l->next)
{
if (strcmp (l->string, bfd_asymbol_name (sym)) == 0)
found_simple = 1;
else
{
char *zbase;
zbase = strchr (l->string, '@');
if (zbase != NULL
&& strcmp (zbase + 1, bfd_asymbol_name (sym)) == 0)
{
/* We must add a symbol with this prefix. */
if (newsymcount >= newsymalloc)
{
newsymalloc += 10;
newsyms = ((asymbol **)
xrealloc ((void *) newsyms,
(newsymalloc
* sizeof (asymbol *))));
}
newsyms[newsymcount] =
(asymbol *) xmalloc (sizeof (asymbol));
*newsyms[newsymcount] = *sym;
newsyms[newsymcount]->name = l->string;
++newsymcount;
}
}
}
if (! found_simple)
{
/* The unmodified symbol is actually not exported at
all. */
sym->flags &=~ (BSF_GLOBAL | BSF_EXPORT);
sym->flags |= BSF_LOCAL;
}
}
/* If it's an undefined symbol, see if it's on the import list.
Change the prefix if necessary. */
if (bfd_is_und_section (bfd_get_section (sym)))
{
struct string_list *l;
for (l = import_symbols; l != NULL; l = l->next)
{
if (strcmp (l->string, bfd_asymbol_name (sym)) == 0)
break;
else
{
char *zbase;
zbase = strchr (l->string, '@');
if (zbase != NULL
&& strcmp (zbase + 1, bfd_asymbol_name (sym)) == 0)
{
sym->name = l->string;
break;
}
}
}
if (l == NULL)
non_fatal (_("warning: symbol %s imported but not in import list"),
bfd_asymbol_name (sym));
}
/* See if it's one of the special named symbols. */
if ((sym->flags & BSF_DEBUGGING) == 0)
{
bfd_vma val;
/* FIXME: If these symbols are not in the .text section, we
add the .text section size to the value. This may not be
correct for all targets. I'm not sure how this should
really be handled. */
if (strcmp (bfd_asymbol_name (sym), start_procedure) == 0)
{
val = bfd_asymbol_value (sym);
if (bfd_get_section (sym) == data_sec
&& text_sec != (asection *) NULL)
val += bfd_section_size (outbfd, text_sec);
if (! bfd_set_start_address (outbfd, val))
bfd_fatal (_("set start address"));
gotstart = TRUE;
}
if (strcmp (bfd_asymbol_name (sym), exit_procedure) == 0)
{
val = bfd_asymbol_value (sym);
if (bfd_get_section (sym) == data_sec
&& text_sec != (asection *) NULL)
val += bfd_section_size (outbfd, text_sec);
nlm_fixed_header (outbfd)->exitProcedureOffset = val;
gotexit = TRUE;
}
if (check_procedure != NULL
&& strcmp (bfd_asymbol_name (sym), check_procedure) == 0)
{
val = bfd_asymbol_value (sym);
if (bfd_get_section (sym) == data_sec
&& text_sec != (asection *) NULL)
val += bfd_section_size (outbfd, text_sec);
nlm_fixed_header (outbfd)->checkUnloadProcedureOffset = val;
gotcheck = TRUE;
}
}
}
if (endsym != NULL)
{
endsym->value = bfd_get_section_size (bss_sec);
/* FIXME: If any relocs referring to _end use inplace addends,
then I think they need to be updated. This is handled by
i386_mangle_relocs. Is it needed for any other object
formats? */
}
if (newsymcount == 0)
outsyms = symbols;
else
{
outsyms = (asymbol **) xmalloc ((symcount + newsymcount + 1)
* sizeof (asymbol *));
memcpy (outsyms, symbols, symcount * sizeof (asymbol *));
memcpy (outsyms + symcount, newsyms, newsymcount * sizeof (asymbol *));
outsyms[symcount + newsymcount] = NULL;
}
bfd_set_symtab (outbfd, outsyms, symcount + newsymcount);
if (! gotstart)
non_fatal (_("warning: START procedure %s not defined"), start_procedure);
if (! gotexit)
non_fatal (_("warning: EXIT procedure %s not defined"), exit_procedure);
if (check_procedure != NULL && ! gotcheck)
non_fatal (_("warning: CHECK procedure %s not defined"), check_procedure);
/* Add additional sections required for the header information. */
if (custom_file != NULL)
{
custom_data = fopen (custom_file, "r");
if (custom_data == NULL
|| fstat (fileno (custom_data), &st) < 0)
{
fprintf (stderr, "%s:%s: %s\n", program_name, custom_file,
strerror (errno));
custom_file = NULL;
}
else
{
custom_size = st.st_size;
custom_section = bfd_make_section_with_flags (outbfd, ".nlmcustom",
SEC_HAS_CONTENTS);
if (custom_section == NULL
|| ! bfd_set_section_size (outbfd, custom_section, custom_size))
bfd_fatal (_("custom section"));
}
}
if (help_file != NULL)
{
help_data = fopen (help_file, "r");
if (help_data == NULL
|| fstat (fileno (help_data), &st) < 0)
{
fprintf (stderr, "%s:%s: %s\n", program_name, help_file,
strerror (errno));
help_file = NULL;
}
else
{
help_size = st.st_size;
help_section = bfd_make_section_with_flags (outbfd, ".nlmhelp",
SEC_HAS_CONTENTS);
if (help_section == NULL
|| ! bfd_set_section_size (outbfd, help_section, help_size))
bfd_fatal (_("help section"));
LITMEMCPY (nlm_extended_header (outbfd)->stamp, "MeSsAgEs");
}
}
if (message_file != NULL)
{
message_data = fopen (message_file, "r");
if (message_data == NULL
|| fstat (fileno (message_data), &st) < 0)
{
fprintf (stderr, "%s:%s: %s\n", program_name, message_file,
strerror (errno));
message_file = NULL;
}
else
{
message_size = st.st_size;
message_section = bfd_make_section_with_flags (outbfd,
".nlmmessages",
SEC_HAS_CONTENTS);
if (message_section == NULL
|| ! bfd_set_section_size (outbfd, message_section, message_size))
bfd_fatal (_("message section"));
LITMEMCPY (nlm_extended_header (outbfd)->stamp, "MeSsAgEs");
}
}
if (modules != NULL)
{
struct string_list *l;
module_size = 0;
for (l = modules; l != NULL; l = l->next)
module_size += strlen (l->string) + 1;
module_section = bfd_make_section_with_flags (outbfd, ".nlmmodules",
SEC_HAS_CONTENTS);
if (module_section == NULL
|| ! bfd_set_section_size (outbfd, module_section, module_size))
bfd_fatal (_("module section"));
}
if (rpc_file != NULL)
{
rpc_data = fopen (rpc_file, "r");
if (rpc_data == NULL
|| fstat (fileno (rpc_data), &st) < 0)
{
fprintf (stderr, "%s:%s: %s\n", program_name, rpc_file,
strerror (errno));
rpc_file = NULL;
}
else
{
rpc_size = st.st_size;
rpc_section = bfd_make_section_with_flags (outbfd, ".nlmrpc",
SEC_HAS_CONTENTS);
if (rpc_section == NULL
|| ! bfd_set_section_size (outbfd, rpc_section, rpc_size))
bfd_fatal (_("rpc section"));
LITMEMCPY (nlm_extended_header (outbfd)->stamp, "MeSsAgEs");
}
}
if (sharelib_file != NULL)
{
sharedbfd = bfd_openr (sharelib_file, output_format);
if (sharedbfd == NULL
|| ! bfd_check_format (sharedbfd, bfd_object))
{
fprintf (stderr, "%s:%s: %s\n", program_name, sharelib_file,
bfd_errmsg (bfd_get_error ()));
sharelib_file = NULL;
}
else
{
sharedhdr = *nlm_fixed_header (sharedbfd);
bfd_close (sharedbfd);
shared_data = fopen (sharelib_file, "r");
if (shared_data == NULL
|| (fstat (fileno (shared_data), &st) < 0))
{
fprintf (stderr, "%s:%s: %s\n", program_name, sharelib_file,
strerror (errno));
sharelib_file = NULL;
}
else
{
/* If we were clever, we could just copy out the
sections of the shared library which we actually
need. However, we would have to figure out the sizes
of the external and public information, and that can
not be done without reading through them. */
if (sharedhdr.uninitializedDataSize > 0)
{
/* There is no place to record this information. */
non_fatal (_("%s: warning: shared libraries can not have uninitialized data"),
sharelib_file);
}
shared_offset = st.st_size;
if (shared_offset > (size_t) sharedhdr.codeImageOffset)
shared_offset = sharedhdr.codeImageOffset;
if (shared_offset > (size_t) sharedhdr.dataImageOffset)
shared_offset = sharedhdr.dataImageOffset;
if (shared_offset > (size_t) sharedhdr.relocationFixupOffset)
shared_offset = sharedhdr.relocationFixupOffset;
if (shared_offset > (size_t) sharedhdr.externalReferencesOffset)
shared_offset = sharedhdr.externalReferencesOffset;
if (shared_offset > (size_t) sharedhdr.publicsOffset)
shared_offset = sharedhdr.publicsOffset;
shared_size = st.st_size - shared_offset;
shared_section = bfd_make_section_with_flags (outbfd,
".nlmshared",
SEC_HAS_CONTENTS);
if (shared_section == NULL
|| ! bfd_set_section_size (outbfd, shared_section,
shared_size))
bfd_fatal (_("shared section"));
LITMEMCPY (nlm_extended_header (outbfd)->stamp, "MeSsAgEs");
}
}
}
/* Check whether a version was given. */
if (!CONST_STRNEQ (version_hdr->stamp, "VeRsIoN#"))
non_fatal (_("warning: No version number given"));
/* At least for now, always create an extended header, because that
is what NLMLINK does. */
LITMEMCPY (nlm_extended_header (outbfd)->stamp, "MeSsAgEs");
LITMEMCPY (nlm_cygnus_ext_header (outbfd)->stamp, "CyGnUsEx");
/* If the date was not given, force it in. */
if (nlm_version_header (outbfd)->month == 0
&& nlm_version_header (outbfd)->day == 0
&& nlm_version_header (outbfd)->year == 0)
{
time_t now;
struct tm *ptm;
time (&now);
ptm = localtime (&now);
nlm_version_header (outbfd)->month = ptm->tm_mon + 1;
nlm_version_header (outbfd)->day = ptm->tm_mday;
nlm_version_header (outbfd)->year = ptm->tm_year + 1900;
LITMEMCPY (version_hdr->stamp, "VeRsIoN#");
}
#ifdef NLMCONV_POWERPC
/* Resolve the stubs we build for PowerPC NetWare. */
if (bfd_get_arch (inbfd) == bfd_arch_powerpc)
powerpc_resolve_stubs (inbfd, outbfd);
#endif
/* Copy over the sections. */
bfd_map_over_sections (inbfd, copy_sections, (void *) outbfd);
/* Finish up the header information. */
if (custom_file != NULL)
{
void *data;
data = xmalloc (custom_size);
if (fread (data, 1, custom_size, custom_data) != custom_size)
non_fatal (_("%s: read: %s"), custom_file, strerror (errno));
else
{
if (! bfd_set_section_contents (outbfd, custom_section, data,
(file_ptr) 0, custom_size))
bfd_fatal (_("custom section"));
nlm_fixed_header (outbfd)->customDataOffset =
custom_section->filepos;
nlm_fixed_header (outbfd)->customDataSize = custom_size;
}
free (data);
}
if (! debug_info)
{
/* As a special hack, the backend recognizes a debugInfoOffset
of -1 to mean that it should not output any debugging
information. This can not be handling by fiddling with the
symbol table because exported symbols appear in both the
export information and the debugging information. */
nlm_fixed_header (outbfd)->debugInfoOffset = (file_ptr) -1;
}
if (full_map)
non_fatal (_("warning: FULLMAP is not supported; try ld -M"));
if (help_file != NULL)
{
void *data;
data = xmalloc (help_size);
if (fread (data, 1, help_size, help_data) != help_size)
non_fatal (_("%s: read: %s"), help_file, strerror (errno));
else
{
if (! bfd_set_section_contents (outbfd, help_section, data,
(file_ptr) 0, help_size))
bfd_fatal (_("help section"));
nlm_extended_header (outbfd)->helpFileOffset =
help_section->filepos;
nlm_extended_header (outbfd)->helpFileLength = help_size;
}
free (data);
}
if (message_file != NULL)
{
void *data;
data = xmalloc (message_size);
if (fread (data, 1, message_size, message_data) != message_size)
non_fatal (_("%s: read: %s"), message_file, strerror (errno));
else
{
if (! bfd_set_section_contents (outbfd, message_section, data,
(file_ptr) 0, message_size))
bfd_fatal (_("message section"));
nlm_extended_header (outbfd)->messageFileOffset =
message_section->filepos;
nlm_extended_header (outbfd)->messageFileLength = message_size;
/* FIXME: Are these offsets correct on all platforms? Are
they 32 bits on all platforms? What endianness? */
nlm_extended_header (outbfd)->languageID =
bfd_h_get_32 (outbfd, (bfd_byte *) data + 106);
nlm_extended_header (outbfd)->messageCount =
bfd_h_get_32 (outbfd, (bfd_byte *) data + 110);
}
free (data);
}
if (modules != NULL)
{
void *data;
unsigned char *set;
struct string_list *l;
bfd_size_type c;
data = xmalloc (module_size);
c = 0;
set = (unsigned char *) data;
for (l = modules; l != NULL; l = l->next)
{
*set = strlen (l->string);
strncpy ((char *) set + 1, l->string, *set);
set += *set + 1;
++c;
}
if (! bfd_set_section_contents (outbfd, module_section, data,
(file_ptr) 0, module_size))
bfd_fatal (_("module section"));
nlm_fixed_header (outbfd)->moduleDependencyOffset =
module_section->filepos;
nlm_fixed_header (outbfd)->numberOfModuleDependencies = c;
}
if (rpc_file != NULL)
{
void *data;
data = xmalloc (rpc_size);
if (fread (data, 1, rpc_size, rpc_data) != rpc_size)
non_fatal (_("%s: read: %s"), rpc_file, strerror (errno));
else
{
if (! bfd_set_section_contents (outbfd, rpc_section, data,
(file_ptr) 0, rpc_size))
bfd_fatal (_("rpc section"));
nlm_extended_header (outbfd)->RPCDataOffset =
rpc_section->filepos;
nlm_extended_header (outbfd)->RPCDataLength = rpc_size;
}
free (data);
}
if (sharelib_file != NULL)
{
void *data;
data = xmalloc (shared_size);
if (fseek (shared_data, shared_offset, SEEK_SET) != 0
|| fread (data, 1, shared_size, shared_data) != shared_size)
non_fatal (_("%s: read: %s"), sharelib_file, strerror (errno));
else
{
if (! bfd_set_section_contents (outbfd, shared_section, data,
(file_ptr) 0, shared_size))
bfd_fatal (_("shared section"));
}
nlm_extended_header (outbfd)->sharedCodeOffset =
sharedhdr.codeImageOffset - shared_offset + shared_section->filepos;
nlm_extended_header (outbfd)->sharedCodeLength =
sharedhdr.codeImageSize;
nlm_extended_header (outbfd)->sharedDataOffset =
sharedhdr.dataImageOffset - shared_offset + shared_section->filepos;
nlm_extended_header (outbfd)->sharedDataLength =
sharedhdr.dataImageSize;
nlm_extended_header (outbfd)->sharedRelocationFixupOffset =
(sharedhdr.relocationFixupOffset
- shared_offset
+ shared_section->filepos);
nlm_extended_header (outbfd)->sharedRelocationFixupCount =
sharedhdr.numberOfRelocationFixups;
nlm_extended_header (outbfd)->sharedExternalReferenceOffset =
(sharedhdr.externalReferencesOffset
- shared_offset
+ shared_section->filepos);
nlm_extended_header (outbfd)->sharedExternalReferenceCount =
sharedhdr.numberOfExternalReferences;
nlm_extended_header (outbfd)->sharedPublicsOffset =
sharedhdr.publicsOffset - shared_offset + shared_section->filepos;
nlm_extended_header (outbfd)->sharedPublicsCount =
sharedhdr.numberOfPublics;
nlm_extended_header (outbfd)->sharedDebugRecordOffset =
sharedhdr.debugInfoOffset - shared_offset + shared_section->filepos;
nlm_extended_header (outbfd)->sharedDebugRecordCount =
sharedhdr.numberOfDebugRecords;
nlm_extended_header (outbfd)->SharedInitializationOffset =
sharedhdr.codeStartOffset;
nlm_extended_header (outbfd)->SharedExitProcedureOffset =
sharedhdr.exitProcedureOffset;
free (data);
}
{
const int max_len = NLM_MODULE_NAME_SIZE - 2;
const char * filename = lbasename (output_file);
len = strlen (filename);
if (len > max_len)
len = max_len;
nlm_fixed_header (outbfd)->moduleName[0] = len;
strncpy (nlm_fixed_header (outbfd)->moduleName + 1, filename, max_len);
nlm_fixed_header (outbfd)->moduleName[max_len + 1] = '\0';
for (modname = nlm_fixed_header (outbfd)->moduleName;
*modname != '\0';
modname++)
*modname = TOUPPER (*modname);
}
strncpy (nlm_variable_header (outbfd)->oldThreadName, " LONG",
NLM_OLD_THREAD_NAME_LENGTH);
nlm_cygnus_ext_header (outbfd)->offset = secsec->filepos;
nlm_cygnus_ext_header (outbfd)->length = bfd_section_size (outbfd, secsec);
if (! bfd_close (outbfd))
bfd_fatal (output_file);
if (! bfd_close (inbfd))
bfd_fatal (input_file);
if (unlink_on_exit != NULL)
unlink (unlink_on_exit);
return 0;
}
/* Show a usage message and exit. */
static void
show_usage (FILE *file, int status)
{
fprintf (file, _("Usage: %s [option(s)] [in-file [out-file]]\n"), program_name);
fprintf (file, _(" Convert an object file into a NetWare Loadable Module\n"));
fprintf (file, _(" The options are:\n\
-I --input-target=<bfdname> Set the input binary file format\n\
-O --output-target=<bfdname> Set the output binary file format\n\
-T --header-file=<file> Read <file> for NLM header information\n\
-l --linker=<linker> Use <linker> for any linking\n\
-d --debug Display on stderr the linker command line\n\
@<file> Read options from <file>.\n\
-h --help Display this information\n\
-v --version Display the program's version\n\
"));
if (REPORT_BUGS_TO[0] && status == 0)
fprintf (file, _("Report bugs to %s\n"), REPORT_BUGS_TO);
exit (status);
}
/* Select the output format based on the input architecture, machine,
and endianness. This chooses the appropriate NLM target. */
static const char *
select_output_format (enum bfd_architecture arch, unsigned long mach,
bfd_boolean bigendian ATTRIBUTE_UNUSED)
{
switch (arch)
{
#ifdef NLMCONV_I386
case bfd_arch_i386:
return "nlm32-i386";
#endif
#ifdef NLMCONV_SPARC
case bfd_arch_sparc:
return "nlm32-sparc";
#endif
#ifdef NLMCONV_ALPHA
case bfd_arch_alpha:
return "nlm32-alpha";
#endif
#ifdef NLMCONV_POWERPC
case bfd_arch_powerpc:
return "nlm32-powerpc";
#endif
default:
fatal (_("support not compiled in for %s"),
bfd_printable_arch_mach (arch, mach));
}
/*NOTREACHED*/
}
/* The BFD sections are copied in two passes. This function selects
the output section for each input section, and sets up the section
name, size, etc. */
static void
setup_sections (bfd *inbfd ATTRIBUTE_UNUSED, asection *insec, void *data_ptr)
{
bfd *outbfd = (bfd *) data_ptr;
flagword f;
const char *outname;
asection *outsec;
bfd_vma offset;
bfd_size_type align;
bfd_size_type add;
bfd_size_type secsecsize;
f = bfd_get_section_flags (inbfd, insec);
if (f & SEC_CODE)
outname = NLM_CODE_NAME;
else if ((f & SEC_LOAD) && (f & SEC_HAS_CONTENTS))
outname = NLM_INITIALIZED_DATA_NAME;
else if (f & SEC_ALLOC)
outname = NLM_UNINITIALIZED_DATA_NAME;
else
outname = bfd_section_name (inbfd, insec);
outsec = bfd_get_section_by_name (outbfd, outname);
if (outsec == NULL)
{
outsec = bfd_make_section (outbfd, outname);
if (outsec == NULL)
bfd_fatal (_("make section"));
}
insec->output_section = outsec;
offset = bfd_section_size (outbfd, outsec);
align = 1 << bfd_section_alignment (inbfd, insec);
add = ((offset + align - 1) &~ (align - 1)) - offset;
insec->output_offset = offset + add;
if (! bfd_set_section_size (outbfd, outsec,
(bfd_section_size (outbfd, outsec)
+ bfd_section_size (inbfd, insec)
+ add)))
bfd_fatal (_("set section size"));
if ((bfd_section_alignment (inbfd, insec)
> bfd_section_alignment (outbfd, outsec))
&& ! bfd_set_section_alignment (outbfd, outsec,
bfd_section_alignment (inbfd, insec)))
bfd_fatal (_("set section alignment"));
if (! bfd_set_section_flags (outbfd, outsec,
f | bfd_get_section_flags (outbfd, outsec)))
bfd_fatal (_("set section flags"));
bfd_set_reloc (outbfd, outsec, (arelent **) NULL, 0);
/* For each input section we allocate space for an entry in
.nlmsections. */
secsecsize = bfd_section_size (outbfd, secsec);
secsecsize += strlen (bfd_section_name (inbfd, insec)) + 1;
secsecsize = (secsecsize + 3) &~ 3;
secsecsize += 8;
if (! bfd_set_section_size (outbfd, secsec, secsecsize))
bfd_fatal (_("set .nlmsections size"));
}
/* Copy the section contents. */
static void
copy_sections (bfd *inbfd, asection *insec, void *data_ptr)
{
static bfd_size_type secsecoff = 0;
bfd *outbfd = (bfd *) data_ptr;
const char *inname;
asection *outsec;
bfd_size_type size;
void *contents;
long reloc_size;
bfd_byte buf[4];
bfd_size_type add;
inname = bfd_section_name (inbfd, insec);
outsec = insec->output_section;
assert (outsec != NULL);
size = bfd_get_section_size (insec);
if ((bfd_get_section_flags (inbfd, insec) & SEC_HAS_CONTENTS) == 0)
contents = NULL;
else
{
contents = xmalloc (size);
if (! bfd_get_section_contents (inbfd, insec, contents,
(file_ptr) 0, size))
bfd_fatal (bfd_get_filename (inbfd));
}
reloc_size = bfd_get_reloc_upper_bound (inbfd, insec);
if (reloc_size < 0)
bfd_fatal (bfd_get_filename (inbfd));
if (reloc_size != 0)
{
arelent **relocs;
long reloc_count;
relocs = (arelent **) xmalloc (reloc_size);
reloc_count = bfd_canonicalize_reloc (inbfd, insec, relocs, symbols);
if (reloc_count < 0)
bfd_fatal (bfd_get_filename (inbfd));
mangle_relocs (outbfd, insec, &relocs, &reloc_count, (char *) contents,
size);
/* FIXME: refers to internal BFD fields. */
if (outsec->orelocation != (arelent **) NULL)
{
bfd_size_type total_count;
arelent **combined;
total_count = reloc_count + outsec->reloc_count;
combined = (arelent **) xmalloc (total_count * sizeof (arelent *));
memcpy (combined, outsec->orelocation,
outsec->reloc_count * sizeof (arelent *));
memcpy (combined + outsec->reloc_count, relocs,
(size_t) (reloc_count * sizeof (arelent *)));
free (outsec->orelocation);
reloc_count = total_count;
relocs = combined;
}
bfd_set_reloc (outbfd, outsec, relocs, reloc_count);
}
if (contents != NULL)
{
if (! bfd_set_section_contents (outbfd, outsec, contents,
insec->output_offset, size))
bfd_fatal (bfd_get_filename (outbfd));
free (contents);
}
/* Add this section to .nlmsections. */
if (! bfd_set_section_contents (outbfd, secsec, (void *) inname, secsecoff,
strlen (inname) + 1))
bfd_fatal (_("set .nlmsection contents"));
secsecoff += strlen (inname) + 1;
add = ((secsecoff + 3) &~ 3) - secsecoff;
if (add != 0)
{
bfd_h_put_32 (outbfd, (bfd_vma) 0, buf);
if (! bfd_set_section_contents (outbfd, secsec, buf, secsecoff, add))
bfd_fatal (_("set .nlmsection contents"));
secsecoff += add;
}
if (contents != NULL)
bfd_h_put_32 (outbfd, (bfd_vma) outsec->filepos, buf);
else
bfd_h_put_32 (outbfd, (bfd_vma) 0, buf);
if (! bfd_set_section_contents (outbfd, secsec, buf, secsecoff, 4))
bfd_fatal (_("set .nlmsection contents"));
secsecoff += 4;
bfd_h_put_32 (outbfd, (bfd_vma) size, buf);
if (! bfd_set_section_contents (outbfd, secsec, buf, secsecoff, 4))
bfd_fatal (_("set .nlmsection contents"));
secsecoff += 4;
}
/* Some, perhaps all, NetWare targets require changing the relocs used
by the input formats. */
static void
mangle_relocs (bfd *outbfd, asection *insec, arelent ***relocs_ptr,
long *reloc_count_ptr, char *contents,
bfd_size_type contents_size)
{
switch (bfd_get_arch (outbfd))
{
#ifdef NLMCONV_I386
case bfd_arch_i386:
i386_mangle_relocs (outbfd, insec, relocs_ptr, reloc_count_ptr,
contents, contents_size);
break;
#endif
#ifdef NLMCONV_ALPHA
case bfd_arch_alpha:
alpha_mangle_relocs (outbfd, insec, relocs_ptr, reloc_count_ptr,
contents, contents_size);
break;
#endif
#ifdef NLMCONV_POWERPC
case bfd_arch_powerpc:
powerpc_mangle_relocs (outbfd, insec, relocs_ptr, reloc_count_ptr,
contents, contents_size);
break;
#endif
default:
default_mangle_relocs (outbfd, insec, relocs_ptr, reloc_count_ptr,
contents, contents_size);
break;
}
}
/* By default all we need to do for relocs is change the address by
the output_offset. */
static void
default_mangle_relocs (bfd *outbfd ATTRIBUTE_UNUSED, asection *insec,
arelent ***relocs_ptr, long *reloc_count_ptr,
char *contents ATTRIBUTE_UNUSED,
bfd_size_type contents_size ATTRIBUTE_UNUSED)
{
if (insec->output_offset != 0)
{
long reloc_count;
arelent **relocs;
long i;
reloc_count = *reloc_count_ptr;
relocs = *relocs_ptr;
for (i = 0; i < reloc_count; i++, relocs++)
(*relocs)->address += insec->output_offset;
}
}
#ifdef NLMCONV_I386
/* NetWare on the i386 supports a restricted set of relocs, which are
different from those used on other i386 targets. This routine
converts the relocs. It is, obviously, very target dependent. At
the moment, the nlm32-i386 backend performs similar translations;
however, it is more reliable and efficient to do them here. */
static reloc_howto_type nlm_i386_pcrel_howto =
HOWTO (1, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
0, /* special_function */
"DISP32", /* name */
TRUE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
TRUE); /* pcrel_offset */
static void
i386_mangle_relocs (bfd *outbfd, asection *insec, arelent ***relocs_ptr,
long *reloc_count_ptr, char *contents,
bfd_size_type contents_size)
{
long reloc_count, i;
arelent **relocs;
reloc_count = *reloc_count_ptr;
relocs = *relocs_ptr;
for (i = 0; i < reloc_count; i++)
{
arelent *rel;
asymbol *sym;
bfd_size_type address;
bfd_vma addend;
rel = *relocs++;
/* PR 17512: file: 057f89c1. */
if (rel->sym_ptr_ptr == NULL)
continue;
sym = *rel->sym_ptr_ptr;
/* We're moving the relocs from the input section to the output
section, so we must adjust the address accordingly. */
address = rel->address;
rel->address += insec->output_offset;
/* Note that no serious harm will ensue if we fail to change a
reloc. The backend will fail when writing out the reloc. */
/* Make sure this reloc is within the data we have. We use only
4 byte relocs here, so we insist on having 4 bytes. */
if (address + 4 > contents_size)
continue;
/* A PC relative reloc entirely within a single section is
completely unnecessary. This can be generated by ld -r. */
if (sym == insec->symbol
&& rel->howto != NULL
&& rel->howto->pc_relative
&& ! rel->howto->pcrel_offset)
{
--*reloc_count_ptr;
--relocs;
memmove (relocs, relocs + 1,
(size_t) ((reloc_count - i) * sizeof (arelent *)));
continue;
}
/* Get the amount the relocation will add in. */
addend = rel->addend + sym->value;
/* NetWare doesn't support PC relative relocs against defined
symbols, so we have to eliminate them by doing the relocation
now. We can only do this if the reloc is within a single
section. */
if (rel->howto != NULL
&& rel->howto->pc_relative
&& bfd_get_section (sym) == insec->output_section)
{
bfd_vma val;
if (rel->howto->pcrel_offset)
addend -= address;
val = bfd_get_32 (outbfd, (bfd_byte *) contents + address);
val += addend;
bfd_put_32 (outbfd, val, (bfd_byte *) contents + address);
--*reloc_count_ptr;
--relocs;
memmove (relocs, relocs + 1,
(size_t) ((reloc_count - i) * sizeof (arelent *)));
continue;
}
/* NetWare doesn't support reloc addends, so we get rid of them
here by simply adding them into the object data. We handle
the symbol value, if any, the same way. */
if (addend != 0
&& rel->howto != NULL
&& rel->howto->rightshift == 0
&& rel->howto->size == 2
&& rel->howto->bitsize == 32
&& rel->howto->bitpos == 0
&& rel->howto->src_mask == 0xffffffff
&& rel->howto->dst_mask == 0xffffffff)
{
bfd_vma val;
val = bfd_get_32 (outbfd, (bfd_byte *) contents + address);
val += addend;
bfd_put_32 (outbfd, val, (bfd_byte *) contents + address);
/* Adjust the reloc for the changes we just made. */
rel->addend = 0;
if (! bfd_is_und_section (bfd_get_section (sym)))
rel->sym_ptr_ptr = bfd_get_section (sym)->symbol_ptr_ptr;
}
/* NetWare uses a reloc with pcrel_offset set. We adjust
pc_relative relocs accordingly. We are going to change the
howto field, so we can only do this if the current one is
compatible. We should check that special_function is NULL
here, but at the moment coff-i386 uses a special_function
which does not affect what we are doing here. */
if (rel->howto != NULL
&& rel->howto->pc_relative
&& ! rel->howto->pcrel_offset
&& rel->howto->rightshift == 0
&& rel->howto->size == 2
&& rel->howto->bitsize == 32
&& rel->howto->bitpos == 0
&& rel->howto->src_mask == 0xffffffff
&& rel->howto->dst_mask == 0xffffffff)
{
bfd_vma val;
/* When pcrel_offset is not set, it means that the negative
of the address of the memory location is stored in the
memory location. We must add it back in. */
val = bfd_get_32 (outbfd, (bfd_byte *) contents + address);
val += address;
bfd_put_32 (outbfd, val, (bfd_byte *) contents + address);
/* We must change to a new howto. */
rel->howto = &nlm_i386_pcrel_howto;
}
}
}
#endif /* NLMCONV_I386 */
#ifdef NLMCONV_ALPHA
/* On the Alpha the first reloc for every section must be a special
relocs which hold the GP address. Also, the first reloc in the
file must be a special reloc which holds the address of the .lita
section. */
static reloc_howto_type nlm32_alpha_nw_howto =
HOWTO (ALPHA_R_NW_RELOC, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
0, /* special_function */
"NW_RELOC", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
FALSE); /* pcrel_offset */
static void
alpha_mangle_relocs (bfd *outbfd, asection *insec,
arelent ***relocs_ptr, long *reloc_count_ptr,
char *contents ATTRIBUTE_UNUSED,
bfd_size_type contents_size ATTRIBUTE_UNUSED)
{
long old_reloc_count;
arelent **old_relocs;
arelent **relocs;
old_reloc_count = *reloc_count_ptr;
old_relocs = *relocs_ptr;
relocs = (arelent **) xmalloc ((old_reloc_count + 3) * sizeof (arelent *));
*relocs_ptr = relocs;
if (nlm_alpha_backend_data (outbfd)->lita_address == 0)
{
bfd *inbfd;
asection *lita_section;
inbfd = insec->owner;
lita_section = bfd_get_section_by_name (inbfd, _LITA);
if (lita_section != (asection *) NULL)
{
nlm_alpha_backend_data (outbfd)->lita_address =
bfd_get_section_vma (inbfd, lita_section);
nlm_alpha_backend_data (outbfd)->lita_size =
bfd_section_size (inbfd, lita_section);
}
else
{
/* Avoid outputting this reloc again. */
nlm_alpha_backend_data (outbfd)->lita_address = 4;
}
*relocs = (arelent *) xmalloc (sizeof (arelent));
(*relocs)->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
(*relocs)->address = nlm_alpha_backend_data (outbfd)->lita_address;
(*relocs)->addend = nlm_alpha_backend_data (outbfd)->lita_size + 1;
(*relocs)->howto = &nlm32_alpha_nw_howto;
++relocs;
++(*reloc_count_ptr);
}
/* Get the GP value from bfd. */
if (nlm_alpha_backend_data (outbfd)->gp == 0)
nlm_alpha_backend_data (outbfd)->gp =
bfd_ecoff_get_gp_value (insec->owner);
*relocs = (arelent *) xmalloc (sizeof (arelent));
(*relocs)->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
(*relocs)->address = nlm_alpha_backend_data (outbfd)->gp;
(*relocs)->addend = 0;
(*relocs)->howto = &nlm32_alpha_nw_howto;
++relocs;
++(*reloc_count_ptr);
memcpy (relocs, old_relocs, (size_t) old_reloc_count * sizeof (arelent *));
relocs[old_reloc_count] = (arelent *) NULL;
free (old_relocs);
if (insec->output_offset != 0)
{
bfd_size_type i;
for (i = 0; i < (bfd_size_type) old_reloc_count; i++, relocs++)
(*relocs)->address += insec->output_offset;
}
}
#endif /* NLMCONV_ALPHA */
#ifdef NLMCONV_POWERPC
/* We keep a linked list of stubs which we must build. Because BFD
requires us to know the sizes of all sections before we can set the
contents of any, we must figure out which stubs we want to build
before we can actually build any of them. */
struct powerpc_stub
{
/* Next stub in linked list. */
struct powerpc_stub *next;
/* Symbol whose value is the start of the stub. This is a symbol
whose name begins with `.'. */
asymbol *start;
/* Symbol we are going to create a reloc against. This is a symbol
with the same name as START but without the leading `.'. */
asymbol *reloc;
/* The TOC index for this stub. This is the index into the TOC
section at which the reloc is created. */
unsigned int toc_index;
};
/* The linked list of stubs. */
static struct powerpc_stub *powerpc_stubs;
/* This is what a stub looks like. The first instruction will get
adjusted with the correct TOC index. */
static unsigned long powerpc_stub_insns[] =
{
0x81820000, /* lwz r12,0(r2) */
0x90410014, /* stw r2,20(r1) */
0x800c0000, /* lwz r0,0(r12) */
0x804c0004, /* lwz r2,r(r12) */
0x7c0903a6, /* mtctr r0 */
0x4e800420, /* bctr */
0, /* Traceback table. */
0xc8000,
0
};
#define POWERPC_STUB_INSN_COUNT \
(sizeof powerpc_stub_insns / sizeof powerpc_stub_insns[0])
#define POWERPC_STUB_SIZE (4 * POWERPC_STUB_INSN_COUNT)
/* Each stub uses a four byte TOC entry. */
#define POWERPC_STUB_TOC_ENTRY_SIZE (4)
/* The original size of the .got section. */
static bfd_size_type powerpc_initial_got_size;
/* Look for all undefined symbols beginning with `.', and prepare to
build a stub for each one. */
static void
powerpc_build_stubs (bfd *inbfd, bfd *outbfd ATTRIBUTE_UNUSED,
asymbol ***symbols_ptr, long *symcount_ptr)
{
asection *stub_sec;
asection *got_sec;
unsigned int got_base;
long i;
long symcount;
long stubcount;
/* Make a section to hold stubs. We don't set SEC_HAS_CONTENTS for
the section to prevent copy_sections from reading from it. */
stub_sec = bfd_make_section_with_flags (inbfd, ".stubs",
(SEC_CODE
| SEC_RELOC
| SEC_ALLOC
| SEC_LOAD));
if (stub_sec == (asection *) NULL
|| ! bfd_set_section_alignment (inbfd, stub_sec, 2))
bfd_fatal (".stubs");
/* Get the TOC section, which is named .got. */
got_sec = bfd_get_section_by_name (inbfd, ".got");
if (got_sec == (asection *) NULL)
{
got_sec = bfd_make_section_with_flags (inbfd, ".got",
(SEC_DATA
| SEC_RELOC
| SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS));
if (got_sec == (asection *) NULL
|| ! bfd_set_section_alignment (inbfd, got_sec, 2))
bfd_fatal (".got");
}
powerpc_initial_got_size = bfd_section_size (inbfd, got_sec);
got_base = powerpc_initial_got_size;
got_base = (got_base + 3) &~ 3;
stubcount = 0;
symcount = *symcount_ptr;
for (i = 0; i < symcount; i++)
{
asymbol *sym;
asymbol *newsym;
char *newname;
struct powerpc_stub *item;
sym = (*symbols_ptr)[i];
/* We must make a stub for every undefined symbol whose name
starts with '.'. */
if (bfd_asymbol_name (sym)[0] != '.'
|| ! bfd_is_und_section (bfd_get_section (sym)))
continue;
/* Make a new undefined symbol with the same name but without
the leading `.'. */
newsym = xmalloc (sizeof (asymbol));
*newsym = *sym;
newname = xmalloc (strlen (bfd_asymbol_name (sym)));
strcpy (newname, bfd_asymbol_name (sym) + 1);
newsym->name = newname;
/* Define the `.' symbol to be in the stub section. */
sym->section = stub_sec;
sym->value = stubcount * POWERPC_STUB_SIZE;
/* We set the BSF_DYNAMIC flag here so that we can check it when
we are mangling relocs. FIXME: This is a hack. */
sym->flags = BSF_LOCAL | BSF_DYNAMIC;
/* Add this stub to the linked list. */
item = (struct powerpc_stub *) xmalloc (sizeof (struct powerpc_stub));
item->start = sym;
item->reloc = newsym;
item->toc_index = got_base + stubcount * POWERPC_STUB_TOC_ENTRY_SIZE;
item->next = powerpc_stubs;
powerpc_stubs = item;
++stubcount;
}
if (stubcount > 0)
{
asymbol **s;
struct powerpc_stub *l;
/* Add the new symbols we just created to the symbol table. */
*symbols_ptr = (asymbol **) xrealloc ((char *) *symbols_ptr,
((symcount + stubcount)
* sizeof (asymbol)));
*symcount_ptr += stubcount;
s = &(*symbols_ptr)[symcount];
for (l = powerpc_stubs; l != (struct powerpc_stub *) NULL; l = l->next)
*s++ = l->reloc;
/* Set the size of the .stubs section and increase the size of
the .got section. */
if (! bfd_set_section_size (inbfd, stub_sec,
stubcount * POWERPC_STUB_SIZE)
|| ! bfd_set_section_size (inbfd, got_sec,
(got_base
+ (stubcount
* POWERPC_STUB_TOC_ENTRY_SIZE))))
bfd_fatal (_("stub section sizes"));
}
}
/* Resolve all the stubs for PowerPC NetWare. We fill in the contents
of the output section, and create new relocs in the TOC. */
static void
powerpc_resolve_stubs (bfd *inbfd, bfd *outbfd)
{
bfd_byte buf[POWERPC_STUB_SIZE];
unsigned int i;
unsigned int stubcount;
arelent **relocs;
asection *got_sec;
arelent **r;
struct powerpc_stub *l;
if (powerpc_stubs == (struct powerpc_stub *) NULL)
return;
for (i = 0; i < POWERPC_STUB_INSN_COUNT; i++)
bfd_put_32 (outbfd, (bfd_vma) powerpc_stub_insns[i], buf + i * 4);
got_sec = bfd_get_section_by_name (inbfd, ".got");
assert (got_sec != (asection *) NULL);
assert (got_sec->output_section->orelocation == (arelent **) NULL);
stubcount = 0;
for (l = powerpc_stubs; l != (struct powerpc_stub *) NULL; l = l->next)
++stubcount;
relocs = (arelent **) xmalloc (stubcount * sizeof (arelent *));
r = relocs;
for (l = powerpc_stubs; l != (struct powerpc_stub *) NULL; l = l->next)
{
arelent *reloc;
/* Adjust the first instruction to use the right TOC index. */
bfd_put_32 (outbfd, (bfd_vma) powerpc_stub_insns[0] + l->toc_index, buf);
/* Write this stub out. */
if (! bfd_set_section_contents (outbfd,
bfd_get_section (l->start),
buf,
l->start->value,
POWERPC_STUB_SIZE))
bfd_fatal (_("writing stub"));
/* Create a new reloc for the TOC entry. */
reloc = (arelent *) xmalloc (sizeof (arelent));
reloc->sym_ptr_ptr = &l->reloc;
reloc->address = l->toc_index + got_sec->output_offset;
reloc->addend = 0;
reloc->howto = bfd_reloc_type_lookup (inbfd, BFD_RELOC_32);
*r++ = reloc;
}
bfd_set_reloc (outbfd, got_sec->output_section, relocs, stubcount);
}
/* Adjust relocation entries for PowerPC NetWare. We do not output
TOC relocations. The object code already contains the offset from
the TOC pointer. When the function is called, the TOC register,
r2, will be set to the correct TOC value, so there is no need for
any further reloc. */
static void
powerpc_mangle_relocs (bfd *outbfd, asection *insec,
arelent ***relocs_ptr,
long *reloc_count_ptr, char *contents,
bfd_size_type contents_size ATTRIBUTE_UNUSED)
{
reloc_howto_type *toc_howto;
long reloc_count;
arelent **relocs;
long i;
toc_howto = bfd_reloc_type_lookup (insec->owner, BFD_RELOC_PPC_TOC16);
if (toc_howto == (reloc_howto_type *) NULL)
fatal (_("Unable to locate PPC_TOC16 reloc information"));
/* If this is the .got section, clear out all the contents beyond
the initial size. We must do this here because copy_sections is
going to write out whatever we return in the contents field. */
if (strcmp (bfd_get_section_name (insec->owner, insec), ".got") == 0)
memset (contents + powerpc_initial_got_size, 0,
(size_t) (bfd_get_section_size (insec) - powerpc_initial_got_size));
reloc_count = *reloc_count_ptr;
relocs = *relocs_ptr;
for (i = 0; i < reloc_count; i++)
{
arelent *rel;
asymbol *sym;
bfd_vma sym_value;
rel = *relocs++;
sym = *rel->sym_ptr_ptr;
/* Convert any relocs against the .bss section into relocs
against the .data section. */
if (strcmp (bfd_get_section_name (outbfd, bfd_get_section (sym)),
NLM_UNINITIALIZED_DATA_NAME) == 0)
{
asection *datasec;
datasec = bfd_get_section_by_name (outbfd,
NLM_INITIALIZED_DATA_NAME);
if (datasec != NULL)
{
rel->addend += (bfd_get_section_vma (outbfd,
bfd_get_section (sym))
+ sym->value);
rel->sym_ptr_ptr = datasec->symbol_ptr_ptr;
sym = *rel->sym_ptr_ptr;
}
}
/* PR 17512: file: 70cfde95. */
if (rel->howto == NULL)
continue;
/* We must be able to resolve all PC relative relocs at this
point. If we get a branch to an undefined symbol we build a
stub, since NetWare will resolve undefined symbols into a
pointer to a function descriptor. */
if (rel->howto->pc_relative)
{
/* This check for whether a symbol is in the same section as
the reloc will be wrong if there is a PC relative reloc
between two sections both of which were placed in the
same output section. This should not happen. */
if (bfd_get_section (sym) != insec->output_section)
non_fatal (_("unresolved PC relative reloc against %s"),
bfd_asymbol_name (sym));
else
{
bfd_vma val;
if (rel->address > contents_size - 4)
{
non_fatal (_("Out of range relocation: %lx"), rel->address);
break;
}
assert (rel->howto->size == 2 && rel->howto->pcrel_offset);
val = bfd_get_32 (outbfd, (bfd_byte *) contents + rel->address);
val = ((val &~ rel->howto->dst_mask)
| (((val & rel->howto->src_mask)
+ (sym->value - rel->address)
+ rel->addend)
& rel->howto->dst_mask));
bfd_put_32 (outbfd, val, (bfd_byte *) contents + rel->address);
/* If this reloc is against an stubbed symbol and the
next instruction is
cror 31,31,31
then we replace the next instruction with
lwz r2,20(r1)
This reloads the TOC pointer after a stub call. */
if (bfd_asymbol_name (sym)[0] == '.'
&& (sym->flags & BSF_DYNAMIC) != 0
&& (bfd_get_32 (outbfd,
(bfd_byte *) contents + rel->address + 4)
== 0x4ffffb82)) /* cror 31,31,31 */
bfd_put_32 (outbfd, (bfd_vma) 0x80410014, /* lwz r2,20(r1) */
(bfd_byte *) contents + rel->address + 4);
--*reloc_count_ptr;
--relocs;
memmove (relocs, relocs + 1,
(size_t) ((reloc_count - 1) * sizeof (arelent *)));
continue;
}
}
/* When considering a TOC reloc, we do not want to include the
symbol value. The symbol will be start of the TOC section
(which is named .got). We do want to include the addend. */
if (rel->howto == toc_howto)
sym_value = 0;
else
sym_value = sym->value;
/* If this is a relocation against a symbol with a value, or
there is a reloc addend, we need to update the addend in the
object file. */
if (sym_value + rel->addend != 0)
{
bfd_vma val;
switch (rel->howto->size)
{
case 1:
if (rel->address > contents_size - 2)
{
non_fatal (_("Out of range relocation: %lx"), rel->address);
break;
}
val = bfd_get_16 (outbfd,
(bfd_byte *) contents + rel->address);
val = ((val &~ rel->howto->dst_mask)
| (((val & rel->howto->src_mask)
+ sym_value
+ rel->addend)
& rel->howto->dst_mask));
if ((bfd_signed_vma) val < - 0x8000
|| (bfd_signed_vma) val >= 0x8000)
non_fatal (_("overflow when adjusting relocation against %s"),
bfd_asymbol_name (sym));
bfd_put_16 (outbfd, val, (bfd_byte *) contents + rel->address);
break;
case 2:
/* PR 17512: file: 0455a112. */
if (rel->address > contents_size - 4)
{
non_fatal (_("Out of range relocation: %lx"), rel->address);
break;
}
val = bfd_get_32 (outbfd,
(bfd_byte *) contents + rel->address);
val = ((val &~ rel->howto->dst_mask)
| (((val & rel->howto->src_mask)
+ sym_value
+ rel->addend)
& rel->howto->dst_mask));
bfd_put_32 (outbfd, val, (bfd_byte *) contents + rel->address);
break;
default:
fatal (_("Unsupported relocation size: %d"), rel->howto->size);
}
if (! bfd_is_und_section (bfd_get_section (sym)))
rel->sym_ptr_ptr = bfd_get_section (sym)->symbol_ptr_ptr;
rel->addend = 0;
}
/* Now that we have incorporated the addend, remove any TOC
relocs. */
if (rel->howto == toc_howto)
{
--*reloc_count_ptr;
--relocs;
memmove (relocs, relocs + 1,
(size_t) ((reloc_count - i) * sizeof (arelent *)));
continue;
}
rel->address += insec->output_offset;
}
}
#endif /* NLMCONV_POWERPC */
/* Name of linker. */
#ifndef LD_NAME
#define LD_NAME "ld"
#endif
/* The user has specified several input files. Invoke the linker to
link them all together, and convert and delete the resulting output
file. */
static char *
link_inputs (struct string_list *inputs, char *ld, char * mfile)
{
size_t c;
struct string_list *q;
char **argv;
size_t i;
int pid;
int status;
char *errfmt;
char *errarg;
c = 0;
for (q = inputs; q != NULL; q = q->next)
++c;
argv = (char **) alloca ((c + 7) * sizeof (char *));
#ifndef __MSDOS__
if (ld == NULL)
{
char *p;
/* Find the linker to invoke based on how nlmconv was run. */
p = program_name + strlen (program_name);
while (p != program_name)
{
if (p[-1] == '/')
{
ld = (char *) xmalloc (p - program_name + strlen (LD_NAME) + 1);
memcpy (ld, program_name, p - program_name);
strcpy (ld + (p - program_name), LD_NAME);
break;
}
--p;
}
}
#endif
if (ld == NULL)
ld = (char *) LD_NAME;
unlink_on_exit = make_temp_file (".O");
argv[0] = ld;
argv[1] = (char *) "-Ur";
argv[2] = (char *) "-o";
argv[3] = unlink_on_exit;
/* If we have been given the name of a mapfile and that
name is not 'stderr' then pass it on to the linker. */
if (mfile
&& * mfile
&& strcmp (mfile, "stderr") == 0)
{
argv[4] = (char *) "-Map";
argv[5] = mfile;
i = 6;
}
else
i = 4;
for (q = inputs; q != NULL; q = q->next, i++)
argv[i] = q->string;
argv[i] = NULL;
if (debug)
{
for (i = 0; argv[i] != NULL; i++)
fprintf (stderr, " %s", argv[i]);
fprintf (stderr, "\n");
}
pid = pexecute (ld, argv, program_name, (char *) NULL, &errfmt, &errarg,
PEXECUTE_SEARCH | PEXECUTE_ONE);
if (pid == -1)
{
fprintf (stderr, _("%s: execution of %s failed: "), program_name, ld);
fprintf (stderr, errfmt, errarg);
unlink (unlink_on_exit);
exit (1);
}
if (pwait (pid, &status, 0) < 0)
{
perror ("pwait");
unlink (unlink_on_exit);
exit (1);
}
if (status != 0)
{
non_fatal (_("Execution of %s failed"), ld);
unlink (unlink_on_exit);
exit (1);
}
return unlink_on_exit;
}
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