blob: c901179ffeb215891a4b4165d7bad26720b739d3 [file] [log] [blame]
/* Collect static initialization info into data structures that can be
traversed by C++ initialization and finalization routines.
Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001, 2002 Free Software Foundation, Inc.
Contributed by Chris Smith (csmith@convex.com).
Heavily modified by Michael Meissner (meissner@cygnus.com),
Per Bothner (bothner@cygnus.com), and John Gilmore (gnu@cygnus.com).
This file is part of GCC.
GCC 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, or (at your option) any later
version.
GCC 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 GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
/* Build tables of static constructors and destructors and run ld. */
#include "config.h"
#include "system.h"
#include <signal.h>
#if ! defined( SIGCHLD ) && defined( SIGCLD )
# define SIGCHLD SIGCLD
#endif
#ifdef vfork /* Autoconf may define this to fork for us. */
# define VFORK_STRING "fork"
#else
# define VFORK_STRING "vfork"
#endif
#ifdef HAVE_VFORK_H
#include <vfork.h>
#endif
#ifdef VMS
#define vfork() (decc$$alloc_vfork_blocks() >= 0 ? \
lib$get_current_invo_context(decc$$get_vfork_jmpbuf()) : -1)
#endif /* VMS */
#ifndef LIBRARY_PATH_ENV
#define LIBRARY_PATH_ENV "LIBRARY_PATH"
#endif
#define COLLECT
#include "collect2.h"
#include "demangle.h"
#include "obstack.h"
#include "intl.h"
#include "version.h"
/* On certain systems, we have code that works by scanning the object file
directly. But this code uses system-specific header files and library
functions, so turn it off in a cross-compiler. Likewise, the names of
the utilities are not correct for a cross-compiler; we have to hope that
cross-versions are in the proper directories. */
#ifdef CROSS_COMPILE
#undef SUNOS4_SHARED_LIBRARIES
#undef OBJECT_FORMAT_COFF
#undef OBJECT_FORMAT_ROSE
#undef MD_EXEC_PREFIX
#undef REAL_LD_FILE_NAME
#undef REAL_NM_FILE_NAME
#undef REAL_STRIP_FILE_NAME
#endif
/* If we cannot use a special method, use the ordinary one:
run nm to find what symbols are present.
In a cross-compiler, this means you need a cross nm,
but that is not quite as unpleasant as special headers. */
#if !defined (OBJECT_FORMAT_COFF) && !defined (OBJECT_FORMAT_ROSE)
#define OBJECT_FORMAT_NONE
#endif
#ifdef OBJECT_FORMAT_COFF
#include <a.out.h>
#include <ar.h>
#ifdef UMAX
#include <sgs.h>
#endif
/* Many versions of ldfcn.h define these. */
#ifdef FREAD
#undef FREAD
#undef FWRITE
#endif
#include <ldfcn.h>
/* Some systems have an ISCOFF macro, but others do not. In some cases
the macro may be wrong. MY_ISCOFF is defined in tm.h files for machines
that either do not have an ISCOFF macro in /usr/include or for those
where it is wrong. */
#ifndef MY_ISCOFF
#define MY_ISCOFF(X) ISCOFF (X)
#endif
#endif /* OBJECT_FORMAT_COFF */
#ifdef OBJECT_FORMAT_ROSE
#ifdef _OSF_SOURCE
#define USE_MMAP
#endif
#ifdef USE_MMAP
#include <sys/mman.h>
#endif
#include <unistd.h>
#include <mach_o_format.h>
#include <mach_o_header.h>
#include <mach_o_vals.h>
#include <mach_o_types.h>
#endif /* OBJECT_FORMAT_ROSE */
#ifdef OBJECT_FORMAT_NONE
/* Default flags to pass to nm. */
#ifndef NM_FLAGS
#define NM_FLAGS "-n"
#endif
#endif /* OBJECT_FORMAT_NONE */
/* Some systems use __main in a way incompatible with its use in gcc, in these
cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
give the same symbol without quotes for an alternative entry point. */
#ifndef NAME__MAIN
#define NAME__MAIN "__main"
#endif
/* This must match tree.h. */
#define DEFAULT_INIT_PRIORITY 65535
#ifndef COLLECT_SHARED_INIT_FUNC
#define COLLECT_SHARED_INIT_FUNC(STREAM, FUNC) \
fprintf ((STREAM), "void _GLOBAL__DI() {\n\t%s();\n}\n", (FUNC))
#endif
#ifndef COLLECT_SHARED_FINI_FUNC
#define COLLECT_SHARED_FINI_FUNC(STREAM, FUNC) \
fprintf ((STREAM), "void _GLOBAL__DD() {\n\t%s();\n}\n", (FUNC))
#endif
#if defined (LDD_SUFFIX) || SUNOS4_SHARED_LIBRARIES
#define SCAN_LIBRARIES
#endif
#ifdef USE_COLLECT2
int do_collecting = 1;
#else
int do_collecting = 0;
#endif
/* Nonzero if we should suppress the automatic demangling of identifiers
in linker error messages. Set from COLLECT_NO_DEMANGLE. */
int no_demangle;
/* Linked lists of constructor and destructor names. */
struct id
{
struct id *next;
int sequence;
char name[1];
};
struct head
{
struct id *first;
struct id *last;
int number;
};
/* Enumeration giving which pass this is for scanning the program file. */
enum pass {
PASS_FIRST, /* without constructors */
PASS_OBJ, /* individual objects */
PASS_LIB, /* looking for shared libraries */
PASS_SECOND /* with constructors linked in */
};
int vflag; /* true if -v */
static int rflag; /* true if -r */
static int strip_flag; /* true if -s */
#ifdef COLLECT_EXPORT_LIST
static int export_flag; /* true if -bE */
static int aix64_flag; /* true if -b64 */
#endif
int debug; /* true if -debug */
static int shared_obj; /* true if -shared */
static const char *c_file; /* <xxx>.c for constructor/destructor list. */
static const char *o_file; /* <xxx>.o for constructor/destructor list. */
#ifdef COLLECT_EXPORT_LIST
static const char *export_file; /* <xxx>.x for AIX export list. */
#endif
const char *ldout; /* File for ld errors. */
static const char *output_file; /* Output file for ld. */
static const char *nm_file_name; /* pathname of nm */
#ifdef LDD_SUFFIX
static const char *ldd_file_name; /* pathname of ldd (or equivalent) */
#endif
static const char *strip_file_name; /* pathname of strip */
const char *c_file_name; /* pathname of gcc */
static char *initname, *fininame; /* names of init and fini funcs */
static struct head constructors; /* list of constructors found */
static struct head destructors; /* list of destructors found */
#ifdef COLLECT_EXPORT_LIST
static struct head exports; /* list of exported symbols */
#endif
static struct head frame_tables; /* list of frame unwind info tables */
struct obstack temporary_obstack;
char * temporary_firstobj;
/* Holds the return value of pexecute. */
int pid;
/* Structure to hold all the directories in which to search for files to
execute. */
struct prefix_list
{
const char *prefix; /* String to prepend to the path. */
struct prefix_list *next; /* Next in linked list. */
};
struct path_prefix
{
struct prefix_list *plist; /* List of prefixes to try */
int max_len; /* Max length of a prefix in PLIST */
const char *name; /* Name of this list (used in config stuff) */
};
#ifdef COLLECT_EXPORT_LIST
/* Lists to keep libraries to be scanned for global constructors/destructors. */
static struct head libs; /* list of libraries */
static struct path_prefix cmdline_lib_dirs; /* directories specified with -L */
static struct path_prefix libpath_lib_dirs; /* directories in LIBPATH */
static struct path_prefix *libpaths[3] = {&cmdline_lib_dirs,
&libpath_lib_dirs, NULL};
static const char *const libexts[3] = {"a", "so", NULL}; /* possible library extensions */
#endif
static void handler PARAMS ((int));
static int is_ctor_dtor PARAMS ((const char *));
static char *find_a_file PARAMS ((struct path_prefix *, const char *));
static void add_prefix PARAMS ((struct path_prefix *, const char *));
static void prefix_from_env PARAMS ((const char *, struct path_prefix *));
static void prefix_from_string PARAMS ((const char *, struct path_prefix *));
static void do_wait PARAMS ((const char *));
static void fork_execute PARAMS ((const char *, char **));
static void maybe_unlink PARAMS ((const char *));
static void add_to_list PARAMS ((struct head *, const char *));
static int extract_init_priority PARAMS ((const char *));
static void sort_ids PARAMS ((struct head *));
static void write_list PARAMS ((FILE *, const char *, struct id *));
#ifdef COLLECT_EXPORT_LIST
static void dump_list PARAMS ((FILE *, const char *, struct id *));
#endif
#if 0
static void dump_prefix_list PARAMS ((FILE *, const char *, struct prefix_list *));
#endif
static void write_list_with_asm PARAMS ((FILE *, const char *, struct id *));
static void write_c_file PARAMS ((FILE *, const char *));
static void write_c_file_stat PARAMS ((FILE *, const char *));
#ifndef LD_INIT_SWITCH
static void write_c_file_glob PARAMS ((FILE *, const char *));
#endif
static void scan_prog_file PARAMS ((const char *, enum pass));
#ifdef SCAN_LIBRARIES
static void scan_libraries PARAMS ((const char *));
#endif
#if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
static int is_in_args PARAMS ((const char *, const char **, const char **));
#endif
#ifdef COLLECT_EXPORT_LIST
#if 0
static int is_in_list PARAMS ((const char *, struct id *));
#endif
static void write_aix_file PARAMS ((FILE *, struct id *));
static char *resolve_lib_name PARAMS ((const char *));
static int ignore_library PARAMS ((const char *));
#endif
static char *extract_string PARAMS ((const char **));
#ifndef HAVE_DUP2
static int dup2 PARAMS ((int, int));
static int
dup2 (oldfd, newfd)
int oldfd;
int newfd;
{
int fdtmp[256];
int fdx = 0;
int fd;
if (oldfd == newfd)
return oldfd;
close (newfd);
while ((fd = dup (oldfd)) != newfd && fd >= 0) /* good enough for low fd's */
fdtmp[fdx++] = fd;
while (fdx > 0)
close (fdtmp[--fdx]);
return fd;
}
#endif /* ! HAVE_DUP2 */
/* Delete tempfiles and exit function. */
void
collect_exit (status)
int status;
{
if (c_file != 0 && c_file[0])
maybe_unlink (c_file);
if (o_file != 0 && o_file[0])
maybe_unlink (o_file);
#ifdef COLLECT_EXPORT_LIST
if (export_file != 0 && export_file[0])
maybe_unlink (export_file);
#endif
if (ldout != 0 && ldout[0])
{
dump_file (ldout);
maybe_unlink (ldout);
}
if (status != 0 && output_file != 0 && output_file[0])
maybe_unlink (output_file);
exit (status);
}
/* Notify user of a non-error. */
void
notice VPARAMS ((const char *msgid, ...))
{
VA_OPEN (ap, msgid);
VA_FIXEDARG (ap, const char *, msgid);
vfprintf (stderr, _(msgid), ap);
VA_CLOSE (ap);
}
/* Die when sys call fails. */
void
fatal_perror VPARAMS ((const char * msgid, ...))
{
int e = errno;
VA_OPEN (ap, msgid);
VA_FIXEDARG (ap, const char *, msgid);
fprintf (stderr, "collect2: ");
vfprintf (stderr, _(msgid), ap);
fprintf (stderr, ": %s\n", xstrerror (e));
VA_CLOSE (ap);
collect_exit (FATAL_EXIT_CODE);
}
/* Just die. */
void
fatal VPARAMS ((const char * msgid, ...))
{
VA_OPEN (ap, msgid);
VA_FIXEDARG (ap, const char *, msgid);
fprintf (stderr, "collect2: ");
vfprintf (stderr, _(msgid), ap);
fprintf (stderr, "\n");
VA_CLOSE (ap);
collect_exit (FATAL_EXIT_CODE);
}
/* Write error message. */
void
error VPARAMS ((const char * msgid, ...))
{
VA_OPEN (ap, msgid);
VA_FIXEDARG (ap, const char *, msgid);
fprintf (stderr, "collect2: ");
vfprintf (stderr, _(msgid), ap);
fprintf (stderr, "\n");
VA_CLOSE(ap);
}
/* In case obstack is linked in, and abort is defined to fancy_abort,
provide a default entry. */
void
fancy_abort ()
{
fatal ("internal error");
}
static void
handler (signo)
int signo;
{
if (c_file != 0 && c_file[0])
maybe_unlink (c_file);
if (o_file != 0 && o_file[0])
maybe_unlink (o_file);
if (ldout != 0 && ldout[0])
maybe_unlink (ldout);
#ifdef COLLECT_EXPORT_LIST
if (export_file != 0 && export_file[0])
maybe_unlink (export_file);
#endif
signal (signo, SIG_DFL);
kill (getpid (), signo);
}
int
file_exists (name)
const char *name;
{
return access (name, R_OK) == 0;
}
/* Parse a reasonable subset of shell quoting syntax. */
static char *
extract_string (pp)
const char **pp;
{
const char *p = *pp;
int backquote = 0;
int inside = 0;
for (;;)
{
char c = *p;
if (c == '\0')
break;
++p;
if (backquote)
obstack_1grow (&temporary_obstack, c);
else if (! inside && c == ' ')
break;
else if (! inside && c == '\\')
backquote = 1;
else if (c == '\'')
inside = !inside;
else
obstack_1grow (&temporary_obstack, c);
}
obstack_1grow (&temporary_obstack, '\0');
*pp = p;
return obstack_finish (&temporary_obstack);
}
void
dump_file (name)
const char *name;
{
FILE *stream = fopen (name, "r");
if (stream == 0)
return;
while (1)
{
int c;
while (c = getc (stream),
c != EOF && (ISIDNUM (c) || c == '$' || c == '.'))
obstack_1grow (&temporary_obstack, c);
if (obstack_object_size (&temporary_obstack) > 0)
{
const char *word, *p;
char *result;
obstack_1grow (&temporary_obstack, '\0');
word = obstack_finish (&temporary_obstack);
if (*word == '.')
++word, putc ('.', stderr);
p = word;
if (!strncmp (p, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX)))
p += strlen (USER_LABEL_PREFIX);
if (no_demangle)
result = 0;
else
result = cplus_demangle (p, DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE);
if (result)
{
int diff;
fputs (result, stderr);
diff = strlen (word) - strlen (result);
while (diff > 0 && c == ' ')
--diff, putc (' ', stderr);
while (diff < 0 && c == ' ')
++diff, c = getc (stream);
free (result);
}
else
fputs (word, stderr);
fflush (stderr);
obstack_free (&temporary_obstack, temporary_firstobj);
}
if (c == EOF)
break;
putc (c, stderr);
}
fclose (stream);
}
/* Decide whether the given symbol is: a constructor (1), a destructor
(2), a routine in a shared object that calls all the constructors
(3) or destructors (4), a DWARF exception-handling table (5), or
nothing special (0). */
static int
is_ctor_dtor (s)
const char *s;
{
struct names { const char *const name; const int len; const int ret;
const int two_underscores; };
const struct names *p;
int ch;
const char *orig_s = s;
static const struct names special[] = {
#ifndef NO_DOLLAR_IN_LABEL
{ "GLOBAL__I$", sizeof ("GLOBAL__I$")-1, 1, 0 },
{ "GLOBAL__D$", sizeof ("GLOBAL__D$")-1, 2, 0 },
#else
#ifndef NO_DOT_IN_LABEL
{ "GLOBAL__I.", sizeof ("GLOBAL__I.")-1, 1, 0 },
{ "GLOBAL__D.", sizeof ("GLOBAL__D.")-1, 2, 0 },
#endif /* NO_DOT_IN_LABEL */
#endif /* NO_DOLLAR_IN_LABEL */
{ "GLOBAL__I_", sizeof ("GLOBAL__I_")-1, 1, 0 },
{ "GLOBAL__D_", sizeof ("GLOBAL__D_")-1, 2, 0 },
{ "GLOBAL__F_", sizeof ("GLOBAL__F_")-1, 5, 0 },
{ "GLOBAL__FI_", sizeof ("GLOBAL__FI_")-1, 3, 0 },
{ "GLOBAL__FD_", sizeof ("GLOBAL__FD_")-1, 4, 0 },
#ifdef CFRONT_LOSSAGE /* Do not collect cfront initialization functions.
cfront has its own linker procedure to collect them;
if collect2 gets them too, they get collected twice
when the cfront procedure is run and the compiler used
for linking happens to be GCC. */
{ "sti__", sizeof ("sti__")-1, 1, 1 },
{ "std__", sizeof ("std__")-1, 2, 1 },
#endif /* CFRONT_LOSSAGE */
{ NULL, 0, 0, 0 }
};
while ((ch = *s) == '_')
++s;
if (s == orig_s)
return 0;
for (p = &special[0]; p->len > 0; p++)
{
if (ch == p->name[0]
&& (!p->two_underscores || ((s - orig_s) >= 2))
&& strncmp(s, p->name, p->len) == 0)
{
return p->ret;
}
}
return 0;
}
/* We maintain two prefix lists: one from COMPILER_PATH environment variable
and one from the PATH variable. */
static struct path_prefix cpath, path;
#ifdef CROSS_COMPILE
/* This is the name of the target machine. We use it to form the name
of the files to execute. */
static const char *const target_machine = TARGET_MACHINE;
#endif
/* Search for NAME using prefix list PPREFIX. We only look for executable
files.
Return 0 if not found, otherwise return its name, allocated with malloc. */
static char *
find_a_file (pprefix, name)
struct path_prefix *pprefix;
const char *name;
{
char *temp;
struct prefix_list *pl;
int len = pprefix->max_len + strlen (name) + 1;
if (debug)
fprintf (stderr, "Looking for '%s'\n", name);
#ifdef HOST_EXECUTABLE_SUFFIX
len += strlen (HOST_EXECUTABLE_SUFFIX);
#endif
temp = xmalloc (len);
/* Determine the filename to execute (special case for absolute paths). */
if (*name == '/'
#ifdef HAVE_DOS_BASED_FILE_SYSTEM
|| (*name && name[1] == ':')
#endif
)
{
if (access (name, X_OK) == 0)
{
strcpy (temp, name);
if (debug)
fprintf (stderr, " - found: absolute path\n");
return temp;
}
#ifdef HOST_EXECUTABLE_SUFFIX
/* Some systems have a suffix for executable files.
So try appending that. */
strcpy (temp, name);
strcat (temp, HOST_EXECUTABLE_SUFFIX);
if (access (temp, X_OK) == 0)
return temp;
#endif
if (debug)
fprintf (stderr, " - failed to locate using absolute path\n");
}
else
for (pl = pprefix->plist; pl; pl = pl->next)
{
struct stat st;
strcpy (temp, pl->prefix);
strcat (temp, name);
if (stat (temp, &st) >= 0
&& ! S_ISDIR (st.st_mode)
&& access (temp, X_OK) == 0)
return temp;
#ifdef HOST_EXECUTABLE_SUFFIX
/* Some systems have a suffix for executable files.
So try appending that. */
strcat (temp, HOST_EXECUTABLE_SUFFIX);
if (stat (temp, &st) >= 0
&& ! S_ISDIR (st.st_mode)
&& access (temp, X_OK) == 0)
return temp;
#endif
}
if (debug && pprefix->plist == NULL)
fprintf (stderr, " - failed: no entries in prefix list\n");
free (temp);
return 0;
}
/* Add an entry for PREFIX to prefix list PPREFIX. */
static void
add_prefix (pprefix, prefix)
struct path_prefix *pprefix;
const char *prefix;
{
struct prefix_list *pl, **prev;
int len;
if (pprefix->plist)
{
for (pl = pprefix->plist; pl->next; pl = pl->next)
;
prev = &pl->next;
}
else
prev = &pprefix->plist;
/* Keep track of the longest prefix */
len = strlen (prefix);
if (len > pprefix->max_len)
pprefix->max_len = len;
pl = (struct prefix_list *) xmalloc (sizeof (struct prefix_list));
pl->prefix = xstrdup (prefix);
if (*prev)
pl->next = *prev;
else
pl->next = (struct prefix_list *) 0;
*prev = pl;
}
/* Take the value of the environment variable ENV, break it into a path, and
add of the entries to PPREFIX. */
static void
prefix_from_env (env, pprefix)
const char *env;
struct path_prefix *pprefix;
{
const char *p;
GET_ENVIRONMENT (p, env);
if (p)
prefix_from_string (p, pprefix);
}
static void
prefix_from_string (p, pprefix)
const char *p;
struct path_prefix *pprefix;
{
const char *startp, *endp;
char *nstore = (char *) xmalloc (strlen (p) + 3);
if (debug)
fprintf (stderr, "Convert string '%s' into prefixes, separator = '%c'\n", p, PATH_SEPARATOR);
startp = endp = p;
while (1)
{
if (*endp == PATH_SEPARATOR || *endp == 0)
{
strncpy (nstore, startp, endp-startp);
if (endp == startp)
{
strcpy (nstore, "./");
}
else if (! IS_DIR_SEPARATOR (endp[-1]))
{
nstore[endp-startp] = DIR_SEPARATOR;
nstore[endp-startp+1] = 0;
}
else
nstore[endp-startp] = 0;
if (debug)
fprintf (stderr, " - add prefix: %s\n", nstore);
add_prefix (pprefix, nstore);
if (*endp == 0)
break;
endp = startp = endp + 1;
}
else
endp++;
}
}
/* Main program. */
int main PARAMS ((int, char *[]));
int
main (argc, argv)
int argc;
char *argv[];
{
static const char *const ld_suffix = "ld";
static const char *const real_ld_suffix = "real-ld";
static const char *const collect_ld_suffix = "collect-ld";
static const char *const nm_suffix = "nm";
static const char *const gnm_suffix = "gnm";
#ifdef LDD_SUFFIX
static const char *const ldd_suffix = LDD_SUFFIX;
#endif
static const char *const strip_suffix = "strip";
static const char *const gstrip_suffix = "gstrip";
#ifdef CROSS_COMPILE
/* If we look for a program in the compiler directories, we just use
the short name, since these directories are already system-specific.
But it we look for a program in the system directories, we need to
qualify the program name with the target machine. */
const char *const full_ld_suffix =
concat(target_machine, "-", ld_suffix, NULL);
const char *const full_nm_suffix =
concat (target_machine, "-", nm_suffix, NULL);
const char *const full_gnm_suffix =
concat (target_machine, "-", gnm_suffix, NULL);
#ifdef LDD_SUFFIX
const char *const full_ldd_suffix =
concat (target_machine, "-", ldd_suffix, NULL);
#endif
const char *const full_strip_suffix =
concat (target_machine, "-", strip_suffix, NULL);
const char *const full_gstrip_suffix =
concat (target_machine, "-", gstrip_suffix, NULL);
#else
const char *const full_ld_suffix = ld_suffix;
const char *const full_nm_suffix = nm_suffix;
const char *const full_gnm_suffix = gnm_suffix;
#ifdef LDD_SUFFIX
const char *const full_ldd_suffix = ldd_suffix;
#endif
const char *const full_strip_suffix = strip_suffix;
const char *const full_gstrip_suffix = gstrip_suffix;
#endif /* CROSS_COMPILE */
const char *arg;
FILE *outf;
#ifdef COLLECT_EXPORT_LIST
FILE *exportf;
#endif
const char *ld_file_name;
const char *p;
char **c_argv;
const char **c_ptr;
char **ld1_argv;
const char **ld1;
char **ld2_argv;
const char **ld2;
char **object_lst;
const char **object;
int first_file;
int num_c_args = argc+9;
no_demangle = !! getenv ("COLLECT_NO_DEMANGLE");
/* Suppress demangling by the real linker, which may be broken. */
putenv (xstrdup ("COLLECT_NO_DEMANGLE="));
#if defined (COLLECT2_HOST_INITIALIZATION)
/* Perform system dependent initialization, if necessary. */
COLLECT2_HOST_INITIALIZATION;
#endif
#ifdef SIGCHLD
/* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will
receive the signal. A different setting is inheritable */
signal (SIGCHLD, SIG_DFL);
#endif
gcc_init_libintl ();
/* Do not invoke xcalloc before this point, since locale needs to be
set first, in case a diagnostic is issued. */
ld1 = (const char **)(ld1_argv = (char **) xcalloc(sizeof (char *), argc+3));
ld2 = (const char **)(ld2_argv = (char **) xcalloc(sizeof (char *), argc+10));
object = (const char **)(object_lst = (char **) xcalloc(sizeof (char *), argc));
#ifdef DEBUG
debug = 1;
#endif
/* Parse command line early for instances of -debug. This allows
the debug flag to be set before functions like find_a_file()
are called. */
{
int i;
for (i = 1; argv[i] != NULL; i ++)
if (! strcmp (argv[i], "-debug"))
debug = 1;
vflag = debug;
}
#ifndef DEFAULT_A_OUT_NAME
output_file = "a.out";
#else
output_file = DEFAULT_A_OUT_NAME;
#endif
obstack_begin (&temporary_obstack, 0);
temporary_firstobj = (char *) obstack_alloc (&temporary_obstack, 0);
current_demangling_style = auto_demangling;
p = getenv ("COLLECT_GCC_OPTIONS");
while (p && *p)
{
const char *q = extract_string (&p);
if (*q == '-' && (q[1] == 'm' || q[1] == 'f'))
num_c_args++;
}
obstack_free (&temporary_obstack, temporary_firstobj);
/* -fno-exceptions -w */
num_c_args += 2;
c_ptr = (const char **)
(c_argv = (char **) xcalloc (sizeof (char *), num_c_args));
if (argc < 2)
fatal ("no arguments");
#ifdef SIGQUIT
if (signal (SIGQUIT, SIG_IGN) != SIG_IGN)
signal (SIGQUIT, handler);
#endif
if (signal (SIGINT, SIG_IGN) != SIG_IGN)
signal (SIGINT, handler);
#ifdef SIGALRM
if (signal (SIGALRM, SIG_IGN) != SIG_IGN)
signal (SIGALRM, handler);
#endif
#ifdef SIGHUP
if (signal (SIGHUP, SIG_IGN) != SIG_IGN)
signal (SIGHUP, handler);
#endif
if (signal (SIGSEGV, SIG_IGN) != SIG_IGN)
signal (SIGSEGV, handler);
#ifdef SIGBUS
if (signal (SIGBUS, SIG_IGN) != SIG_IGN)
signal (SIGBUS, handler);
#endif
/* Extract COMPILER_PATH and PATH into our prefix list. */
prefix_from_env ("COMPILER_PATH", &cpath);
prefix_from_env ("PATH", &path);
/* Try to discover a valid linker/nm/strip to use. */
/* Maybe we know the right file to use (if not cross). */
ld_file_name = 0;
#ifdef DEFAULT_LINKER
if (access (DEFAULT_LINKER, X_OK) == 0)
ld_file_name = DEFAULT_LINKER;
if (ld_file_name == 0)
#endif
#ifdef REAL_LD_FILE_NAME
ld_file_name = find_a_file (&path, REAL_LD_FILE_NAME);
if (ld_file_name == 0)
#endif
/* Search the (target-specific) compiler dirs for ld'. */
ld_file_name = find_a_file (&cpath, real_ld_suffix);
/* Likewise for `collect-ld'. */
if (ld_file_name == 0)
ld_file_name = find_a_file (&cpath, collect_ld_suffix);
/* Search the compiler directories for `ld'. We have protection against
recursive calls in find_a_file. */
if (ld_file_name == 0)
ld_file_name = find_a_file (&cpath, ld_suffix);
/* Search the ordinary system bin directories
for `ld' (if native linking) or `TARGET-ld' (if cross). */
if (ld_file_name == 0)
ld_file_name = find_a_file (&path, full_ld_suffix);
#ifdef REAL_NM_FILE_NAME
nm_file_name = find_a_file (&path, REAL_NM_FILE_NAME);
if (nm_file_name == 0)
#endif
nm_file_name = find_a_file (&cpath, gnm_suffix);
if (nm_file_name == 0)
nm_file_name = find_a_file (&path, full_gnm_suffix);
if (nm_file_name == 0)
nm_file_name = find_a_file (&cpath, nm_suffix);
if (nm_file_name == 0)
nm_file_name = find_a_file (&path, full_nm_suffix);
#ifdef LDD_SUFFIX
ldd_file_name = find_a_file (&cpath, ldd_suffix);
if (ldd_file_name == 0)
ldd_file_name = find_a_file (&path, full_ldd_suffix);
#endif
#ifdef REAL_STRIP_FILE_NAME
strip_file_name = find_a_file (&path, REAL_STRIP_FILE_NAME);
if (strip_file_name == 0)
#endif
strip_file_name = find_a_file (&cpath, gstrip_suffix);
if (strip_file_name == 0)
strip_file_name = find_a_file (&path, full_gstrip_suffix);
if (strip_file_name == 0)
strip_file_name = find_a_file (&cpath, strip_suffix);
if (strip_file_name == 0)
strip_file_name = find_a_file (&path, full_strip_suffix);
/* Determine the full path name of the C compiler to use. */
c_file_name = getenv ("COLLECT_GCC");
if (c_file_name == 0)
{
#ifdef CROSS_COMPILE
c_file_name = concat (target_machine, "-gcc", NULL);
#else
c_file_name = "gcc";
#endif
}
p = find_a_file (&cpath, c_file_name);
/* Here it should be safe to use the system search path since we should have
already qualified the name of the compiler when it is needed. */
if (p == 0)
p = find_a_file (&path, c_file_name);
if (p)
c_file_name = p;
*ld1++ = *ld2++ = ld_file_name;
/* Make temp file names. */
c_file = make_temp_file (".c");
o_file = make_temp_file (".o");
#ifdef COLLECT_EXPORT_LIST
export_file = make_temp_file (".x");
#endif
ldout = make_temp_file (".ld");
*c_ptr++ = c_file_name;
*c_ptr++ = "-x";
*c_ptr++ = "c";
*c_ptr++ = "-c";
*c_ptr++ = "-o";
*c_ptr++ = o_file;
#ifdef COLLECT_EXPORT_LIST
/* Generate a list of directories from LIBPATH. */
prefix_from_env ("LIBPATH", &libpath_lib_dirs);
/* Add to this list also two standard directories where
AIX loader always searches for libraries. */
add_prefix (&libpath_lib_dirs, "/lib");
add_prefix (&libpath_lib_dirs, "/usr/lib");
#endif
/* Get any options that the upper GCC wants to pass to the sub-GCC.
AIX support needs to know if -shared has been specified before
parsing commandline arguments. */
p = getenv ("COLLECT_GCC_OPTIONS");
while (p && *p)
{
const char *q = extract_string (&p);
if (*q == '-' && (q[1] == 'm' || q[1] == 'f'))
*c_ptr++ = xstrdup (q);
if (strcmp (q, "-EL") == 0 || strcmp (q, "-EB") == 0)
*c_ptr++ = xstrdup (q);
if (strcmp (q, "-shared") == 0)
shared_obj = 1;
if (*q == '-' && q[1] == 'B')
{
*c_ptr++ = xstrdup (q);
if (q[2] == 0)
{
q = extract_string (&p);
*c_ptr++ = xstrdup (q);
}
}
}
obstack_free (&temporary_obstack, temporary_firstobj);
*c_ptr++ = "-fno-exceptions";
*c_ptr++ = "-w";
/* !!! When GCC calls collect2,
it does not know whether it is calling collect2 or ld.
So collect2 cannot meaningfully understand any options
except those ld understands.
If you propose to make GCC pass some other option,
just imagine what will happen if ld is really ld!!! */
/* Parse arguments. Remember output file spec, pass the rest to ld. */
/* After the first file, put in the c++ rt0. */
first_file = 1;
while ((arg = *++argv) != (char *) 0)
{
*ld1++ = *ld2++ = arg;
if (arg[0] == '-')
{
switch (arg[1])
{
#ifdef COLLECT_EXPORT_LIST
/* We want to disable automatic exports on AIX when user
explicitly puts an export list in command line */
case 'b':
if (arg[2] == 'E' || strncmp (&arg[2], "export", 6) == 0)
export_flag = 1;
else if (arg[2] == '6' && arg[3] == '4')
aix64_flag = 1;
break;
#endif
case 'd':
if (!strcmp (arg, "-debug"))
{
/* Already parsed. */
ld1--;
ld2--;
}
break;
case 'l':
if (first_file)
{
/* place o_file BEFORE this argument! */
first_file = 0;
ld2--;
*ld2++ = o_file;
*ld2++ = arg;
}
#ifdef COLLECT_EXPORT_LIST
{
/* Resolving full library name. */
const char *s = resolve_lib_name (arg+2);
/* Saving a full library name. */
add_to_list (&libs, s);
}
#endif
break;
#ifdef COLLECT_EXPORT_LIST
/* Saving directories where to search for libraries. */
case 'L':
add_prefix (&cmdline_lib_dirs, arg+2);
break;
#else
#if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
case 'L':
if (is_in_args (arg, (const char **) ld1_argv, ld1-1))
--ld1;
break;
#endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
#endif
case 'o':
if (arg[2] == '\0')
output_file = *ld1++ = *ld2++ = *++argv;
else if (1
#ifdef SWITCHES_NEED_SPACES
&& ! strchr (SWITCHES_NEED_SPACES, arg[1])
#endif
)
output_file = &arg[2];
break;
case 'r':
if (arg[2] == '\0')
rflag = 1;
break;
case 's':
if (arg[2] == '\0' && do_collecting)
{
/* We must strip after the nm run, otherwise C++ linking
will not work. Thus we strip in the second ld run, or
else with strip if there is no second ld run. */
strip_flag = 1;
ld1--;
}
break;
case 'v':
if (arg[2] == '\0')
vflag = 1;
break;
}
}
else if ((p = strrchr (arg, '.')) != (char *) 0
&& (strcmp (p, ".o") == 0 || strcmp (p, ".a") == 0
|| strcmp (p, ".so") == 0 || strcmp (p, ".lo") == 0
|| strcmp (p, ".obj") == 0))
{
if (first_file)
{
first_file = 0;
if (p[1] == 'o')
*ld2++ = o_file;
else
{
/* place o_file BEFORE this argument! */
ld2--;
*ld2++ = o_file;
*ld2++ = arg;
}
}
if (p[1] == 'o' || p[1] == 'l')
*object++ = arg;
#ifdef COLLECT_EXPORT_LIST
/* libraries can be specified directly, i.e. without -l flag. */
else
{
/* Saving a full library name. */
add_to_list (&libs, arg);
}
#endif
}
}
#ifdef COLLECT_EXPORT_LIST
/* This is added only for debugging purposes. */
if (debug)
{
fprintf (stderr, "List of libraries:\n");
dump_list (stderr, "\t", libs.first);
}
/* The AIX linker will discard static constructors in object files if
nothing else in the file is referenced, so look at them first. */
{
const char **export_object_lst = (const char **)object_lst;
while (export_object_lst < object)
scan_prog_file (*export_object_lst++, PASS_OBJ);
}
{
struct id *list = libs.first;
for (; list; list = list->next)
scan_prog_file (list->name, PASS_FIRST);
}
if (exports.first)
{
char *buf = concat ("-bE:", export_file, NULL);
*ld1++ = buf;
*ld2++ = buf;
exportf = fopen (export_file, "w");
if (exportf == (FILE *) 0)
fatal_perror ("fopen %s", export_file);
write_aix_file (exportf, exports.first);
if (fclose (exportf))
fatal_perror ("fclose %s", export_file);
}
#endif
*c_ptr++ = c_file;
*c_ptr = *ld1 = *object = (char *) 0;
if (vflag)
{
notice ("collect2 version %s", version_string);
#ifdef TARGET_VERSION
TARGET_VERSION;
#endif
fprintf (stderr, "\n");
}
if (debug)
{
const char *ptr;
fprintf (stderr, "ld_file_name = %s\n",
(ld_file_name ? ld_file_name : "not found"));
fprintf (stderr, "c_file_name = %s\n",
(c_file_name ? c_file_name : "not found"));
fprintf (stderr, "nm_file_name = %s\n",
(nm_file_name ? nm_file_name : "not found"));
#ifdef LDD_SUFFIX
fprintf (stderr, "ldd_file_name = %s\n",
(ldd_file_name ? ldd_file_name : "not found"));
#endif
fprintf (stderr, "strip_file_name = %s\n",
(strip_file_name ? strip_file_name : "not found"));
fprintf (stderr, "c_file = %s\n",
(c_file ? c_file : "not found"));
fprintf (stderr, "o_file = %s\n",
(o_file ? o_file : "not found"));
ptr = getenv ("COLLECT_GCC_OPTIONS");
if (ptr)
fprintf (stderr, "COLLECT_GCC_OPTIONS = %s\n", ptr);
ptr = getenv ("COLLECT_GCC");
if (ptr)
fprintf (stderr, "COLLECT_GCC = %s\n", ptr);
ptr = getenv ("COMPILER_PATH");
if (ptr)
fprintf (stderr, "COMPILER_PATH = %s\n", ptr);
ptr = getenv (LIBRARY_PATH_ENV);
if (ptr)
fprintf (stderr, "%-20s= %s\n", LIBRARY_PATH_ENV, ptr);
fprintf (stderr, "\n");
}
/* Load the program, searching all libraries and attempting to provide
undefined symbols from repository information. */
/* On AIX we do this later. */
#ifndef COLLECT_EXPORT_LIST
do_tlink (ld1_argv, object_lst);
#endif
/* If -r or they will be run via some other method, do not build the
constructor or destructor list, just return now. */
if (rflag
#ifndef COLLECT_EXPORT_LIST
|| ! do_collecting
#endif
)
{
#ifdef COLLECT_EXPORT_LIST
/* Do the link we avoided above if we are exiting. */
do_tlink (ld1_argv, object_lst);
/* But make sure we delete the export file we may have created. */
if (export_file != 0 && export_file[0])
maybe_unlink (export_file);
#endif
maybe_unlink (c_file);
maybe_unlink (o_file);
return 0;
}
/* Examine the namelist with nm and search it for static constructors
and destructors to call.
Write the constructor and destructor tables to a .s file and reload. */
/* On AIX we already scanned for global constructors/destructors. */
#ifndef COLLECT_EXPORT_LIST
scan_prog_file (output_file, PASS_FIRST);
#endif
#ifdef SCAN_LIBRARIES
scan_libraries (output_file);
#endif
if (debug)
{
notice ("%d constructor(s) found\n", constructors.number);
notice ("%d destructor(s) found\n", destructors.number);
notice ("%d frame table(s) found\n", frame_tables.number);
}
if (constructors.number == 0 && destructors.number == 0
&& frame_tables.number == 0
#if defined (SCAN_LIBRARIES) || defined (COLLECT_EXPORT_LIST)
/* If we will be running these functions ourselves, we want to emit
stubs into the shared library so that we do not have to relink
dependent programs when we add static objects. */
&& ! shared_obj
#endif
)
{
#ifdef COLLECT_EXPORT_LIST
/* Do tlink without additional code generation */
do_tlink (ld1_argv, object_lst);
#endif
/* Strip now if it was requested on the command line. */
if (strip_flag)
{
char **real_strip_argv = (char **) xcalloc (sizeof (char *), 3);
const char ** strip_argv = (const char **) real_strip_argv;
strip_argv[0] = strip_file_name;
strip_argv[1] = output_file;
strip_argv[2] = (char *) 0;
fork_execute ("strip", real_strip_argv);
}
#ifdef COLLECT_EXPORT_LIST
maybe_unlink (export_file);
#endif
maybe_unlink (c_file);
maybe_unlink (o_file);
return 0;
}
/* Sort ctor and dtor lists by priority. */
sort_ids (&constructors);
sort_ids (&destructors);
maybe_unlink(output_file);
outf = fopen (c_file, "w");
if (outf == (FILE *) 0)
fatal_perror ("fopen %s", c_file);
write_c_file (outf, c_file);
if (fclose (outf))
fatal_perror ("fclose %s", c_file);
/* Tell the linker that we have initializer and finalizer functions. */
#ifdef LD_INIT_SWITCH
#ifdef COLLECT_EXPORT_LIST
*ld2++ = concat (LD_INIT_SWITCH, ":", initname, ":", fininame, NULL);
#else
*ld2++ = LD_INIT_SWITCH;
*ld2++ = initname;
*ld2++ = LD_FINI_SWITCH;
*ld2++ = fininame;
#endif
#endif
#ifdef COLLECT_EXPORT_LIST
if (shared_obj)
{
/* If we did not add export flag to link arguments before, add it to
second link phase now. No new exports should have been added. */
if (! exports.first)
*ld2++ = concat ("-bE:", export_file, NULL);
add_to_list (&exports, initname);
add_to_list (&exports, fininame);
add_to_list (&exports, "_GLOBAL__DI");
add_to_list (&exports, "_GLOBAL__DD");
exportf = fopen (export_file, "w");
if (exportf == (FILE *) 0)
fatal_perror ("fopen %s", export_file);
write_aix_file (exportf, exports.first);
if (fclose (exportf))
fatal_perror ("fclose %s", export_file);
}
#endif
/* End of arguments to second link phase. */
*ld2 = (char*) 0;
if (debug)
{
fprintf (stderr, "\n========== output_file = %s, c_file = %s\n",
output_file, c_file);
write_c_file (stderr, "stderr");
fprintf (stderr, "========== end of c_file\n\n");
#ifdef COLLECT_EXPORT_LIST
fprintf (stderr, "\n========== export_file = %s\n", export_file);
write_aix_file (stderr, exports.first);
fprintf (stderr, "========== end of export_file\n\n");
#endif
}
/* Assemble the constructor and destructor tables.
Link the tables in with the rest of the program. */
fork_execute ("gcc", c_argv);
#ifdef COLLECT_EXPORT_LIST
/* On AIX we must call tlink because of possible templates resolution */
do_tlink (ld2_argv, object_lst);
#else
/* Otherwise, simply call ld because tlink is already done */
fork_execute ("ld", ld2_argv);
/* Let scan_prog_file do any final mods (OSF/rose needs this for
constructors/destructors in shared libraries. */
scan_prog_file (output_file, PASS_SECOND);
#endif
maybe_unlink (c_file);
maybe_unlink (o_file);
#ifdef COLLECT_EXPORT_LIST
maybe_unlink (export_file);
#endif
return 0;
}
/* Wait for a process to finish, and exit if a nonzero status is found. */
int
collect_wait (prog)
const char *prog;
{
int status;
pwait (pid, &status, 0);
if (status)
{
if (WIFSIGNALED (status))
{
int sig = WTERMSIG (status);
error ("%s terminated with signal %d [%s]%s",
prog, sig, strsignal(sig),
WCOREDUMP(status) ? ", core dumped" : "");
collect_exit (FATAL_EXIT_CODE);
}
if (WIFEXITED (status))
return WEXITSTATUS (status);
}
return 0;
}
static void
do_wait (prog)
const char *prog;
{
int ret = collect_wait (prog);
if (ret != 0)
{
error ("%s returned %d exit status", prog, ret);
collect_exit (ret);
}
}
/* Execute a program, and wait for the reply. */
void
collect_execute (prog, argv, redir)
const char *prog;
char **argv;
const char *redir;
{
char *errmsg_fmt;
char *errmsg_arg;
int redir_handle = -1;
int stdout_save = -1;
int stderr_save = -1;
if (vflag || debug)
{
char **p_argv;
const char *str;
if (argv[0])
fprintf (stderr, "%s", argv[0]);
else
notice ("[cannot find %s]", prog);
for (p_argv = &argv[1]; (str = *p_argv) != (char *) 0; p_argv++)
fprintf (stderr, " %s", str);
fprintf (stderr, "\n");
}
fflush (stdout);
fflush (stderr);
/* If we cannot find a program we need, complain error. Do this here
since we might not end up needing something that we could not find. */
if (argv[0] == 0)
fatal ("cannot find `%s'", prog);
if (redir)
{
/* Open response file. */
redir_handle = open (redir, O_WRONLY | O_TRUNC | O_CREAT);
/* Duplicate the stdout and stderr file handles
so they can be restored later. */
stdout_save = dup (STDOUT_FILENO);
if (stdout_save == -1)
fatal_perror ("redirecting stdout: %s", redir);
stderr_save = dup (STDERR_FILENO);
if (stderr_save == -1)
fatal_perror ("redirecting stdout: %s", redir);
/* Redirect stdout & stderr to our response file. */
dup2 (redir_handle, STDOUT_FILENO);
dup2 (redir_handle, STDERR_FILENO);
}
pid = pexecute (argv[0], argv, argv[0], NULL,
&errmsg_fmt, &errmsg_arg,
(PEXECUTE_FIRST | PEXECUTE_LAST | PEXECUTE_SEARCH));
if (redir)
{
/* Restore stdout and stderr to their previous settings. */
dup2 (stdout_save, STDOUT_FILENO);
dup2 (stderr_save, STDERR_FILENO);
/* Close response file. */
close (redir_handle);
}
if (pid == -1)
fatal_perror (errmsg_fmt, errmsg_arg);
}
static void
fork_execute (prog, argv)
const char *prog;
char **argv;
{
collect_execute (prog, argv, NULL);
do_wait (prog);
}
/* Unlink a file unless we are debugging. */
static void
maybe_unlink (file)
const char *file;
{
if (!debug)
unlink (file);
else
notice ("[Leaving %s]\n", file);
}
static long sequence_number = 0;
/* Add a name to a linked list. */
static void
add_to_list (head_ptr, name)
struct head *head_ptr;
const char *name;
{
struct id *newid
= (struct id *) xcalloc (sizeof (struct id) + strlen (name), 1);
struct id *p;
strcpy (newid->name, name);
if (head_ptr->first)
head_ptr->last->next = newid;
else
head_ptr->first = newid;
/* Check for duplicate symbols. */
for (p = head_ptr->first;
strcmp (name, p->name) != 0;
p = p->next)
;
if (p != newid)
{
head_ptr->last->next = 0;
free (newid);
return;
}
newid->sequence = ++sequence_number;
head_ptr->last = newid;
head_ptr->number++;
}
/* Grab the init priority number from an init function name that
looks like "_GLOBAL_.I.12345.foo". */
static int
extract_init_priority (name)
const char *name;
{
int pos = 0, pri;
while (name[pos] == '_')
++pos;
pos += 10; /* strlen ("GLOBAL__X_") */
/* Extract init_p number from ctor/dtor name. */
pri = atoi (name + pos);
return pri ? pri : DEFAULT_INIT_PRIORITY;
}
/* Insertion sort the ids from ctor/dtor list HEAD_PTR in descending order.
ctors will be run from right to left, dtors from left to right. */
static void
sort_ids (head_ptr)
struct head *head_ptr;
{
/* id holds the current element to insert. id_next holds the next
element to insert. id_ptr iterates through the already sorted elements
looking for the place to insert id. */
struct id *id, *id_next, **id_ptr;
id = head_ptr->first;
/* We don't have any sorted elements yet. */
head_ptr->first = NULL;
for (; id; id = id_next)
{
id_next = id->next;
id->sequence = extract_init_priority (id->name);
for (id_ptr = &(head_ptr->first); ; id_ptr = &((*id_ptr)->next))
if (*id_ptr == NULL
/* If the sequence numbers are the same, we put the id from the
file later on the command line later in the list. */
|| id->sequence > (*id_ptr)->sequence
/* Hack: do lexical compare, too.
|| (id->sequence == (*id_ptr)->sequence
&& strcmp (id->name, (*id_ptr)->name) > 0) */
)
{
id->next = *id_ptr;
*id_ptr = id;
break;
}
}
/* Now set the sequence numbers properly so write_c_file works. */
for (id = head_ptr->first; id; id = id->next)
id->sequence = ++sequence_number;
}
/* Write: `prefix', the names on list LIST, `suffix'. */
static void
write_list (stream, prefix, list)
FILE *stream;
const char *prefix;
struct id *list;
{
while (list)
{
fprintf (stream, "%sx%d,\n", prefix, list->sequence);
list = list->next;
}
}
#if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
/* Given a STRING, return nonzero if it occurs in the list in range
[ARGS_BEGIN,ARGS_END). */
static int
is_in_args (string, args_begin, args_end)
const char *string;
const char **args_begin;
const char **args_end;
{
const char **args_pointer;
for (args_pointer = args_begin; args_pointer != args_end; ++args_pointer)
if (strcmp (string, *args_pointer) == 0)
return 1;
return 0;
}
#endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
#ifdef COLLECT_EXPORT_LIST
/* This function is really used only on AIX, but may be useful. */
#if 0
static int
is_in_list (prefix, list)
const char *prefix;
struct id *list;
{
while (list)
{
if (!strcmp (prefix, list->name)) return 1;
list = list->next;
}
return 0;
}
#endif
#endif /* COLLECT_EXPORT_LIST */
/* Added for debugging purpose. */
#ifdef COLLECT_EXPORT_LIST
static void
dump_list (stream, prefix, list)
FILE *stream;
const char *prefix;
struct id *list;
{
while (list)
{
fprintf (stream, "%s%s,\n", prefix, list->name);
list = list->next;
}
}
#endif
#if 0
static void
dump_prefix_list (stream, prefix, list)
FILE *stream;
const char *prefix;
struct prefix_list *list;
{
while (list)
{
fprintf (stream, "%s%s,\n", prefix, list->prefix);
list = list->next;
}
}
#endif
static void
write_list_with_asm (stream, prefix, list)
FILE *stream;
const char *prefix;
struct id *list;
{
while (list)
{
fprintf (stream, "%sx%d __asm__ (\"%s\");\n",
prefix, list->sequence, list->name);
list = list->next;
}
}
/* Write out the constructor and destructor tables statically (for a shared
object), along with the functions to execute them. */
static void
write_c_file_stat (stream, name)
FILE *stream;
const char *name ATTRIBUTE_UNUSED;
{
const char *p, *q;
char *prefix, *r;
int frames = (frame_tables.number > 0);
/* Figure out name of output_file, stripping off .so version. */
p = strrchr (output_file, '/');
if (p == 0)
p = output_file;
else
p++;
q = p;
while (q)
{
q = strchr (q,'.');
if (q == 0)
{
q = p + strlen (p);
break;
}
else
{
if (strncmp (q, ".so", 3) == 0)
{
q += 3;
break;
}
else
q++;
}
}
/* q points to null at end of the string (or . of the .so version) */
prefix = xmalloc (q - p + 1);
strncpy (prefix, p, q - p);
prefix[q - p] = 0;
for (r = prefix; *r; r++)
if (!ISALNUM ((unsigned char)*r))
*r = '_';
if (debug)
notice ("\nwrite_c_file - output name is %s, prefix is %s\n",
output_file, prefix);
initname = concat ("_GLOBAL__FI_", prefix, NULL);
fininame = concat ("_GLOBAL__FD_", prefix, NULL);
free (prefix);
/* Write the tables as C code */
fprintf (stream, "static int count;\n");
fprintf (stream, "typedef void entry_pt();\n");
write_list_with_asm (stream, "extern entry_pt ", constructors.first);
if (frames)
{
write_list_with_asm (stream, "extern void *", frame_tables.first);
fprintf (stream, "\tstatic void *frame_table[] = {\n");
write_list (stream, "\t\t&", frame_tables.first);
fprintf (stream, "\t0\n};\n");
/* This must match what's in frame.h. */
fprintf (stream, "struct object {\n");
fprintf (stream, " void *pc_begin;\n");
fprintf (stream, " void *pc_end;\n");
fprintf (stream, " void *fde_begin;\n");
fprintf (stream, " void *fde_array;\n");
fprintf (stream, " __SIZE_TYPE__ count;\n");
fprintf (stream, " struct object *next;\n");
fprintf (stream, "};\n");
fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n");
fprintf (stream, "extern void *__deregister_frame_info (void *);\n");
fprintf (stream, "static void reg_frame () {\n");
fprintf (stream, "\tstatic struct object ob;\n");
fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n");
fprintf (stream, "\t}\n");
fprintf (stream, "static void dereg_frame () {\n");
fprintf (stream, "\t__deregister_frame_info (frame_table);\n");
fprintf (stream, "\t}\n");
}
fprintf (stream, "void %s() {\n", initname);
if (constructors.number > 0 || frames)
{
fprintf (stream, "\tstatic entry_pt *ctors[] = {\n");
write_list (stream, "\t\t", constructors.first);
if (frames)
fprintf (stream, "\treg_frame,\n");
fprintf (stream, "\t};\n");
fprintf (stream, "\tentry_pt **p;\n");
fprintf (stream, "\tif (count++ != 0) return;\n");
fprintf (stream, "\tp = ctors + %d;\n", constructors.number + frames);
fprintf (stream, "\twhile (p > ctors) (*--p)();\n");
}
else
fprintf (stream, "\t++count;\n");
fprintf (stream, "}\n");
write_list_with_asm (stream, "extern entry_pt ", destructors.first);
fprintf (stream, "void %s() {\n", fininame);
if (destructors.number > 0 || frames)
{
fprintf (stream, "\tstatic entry_pt *dtors[] = {\n");
write_list (stream, "\t\t", destructors.first);
if (frames)
fprintf (stream, "\tdereg_frame,\n");
fprintf (stream, "\t};\n");
fprintf (stream, "\tentry_pt **p;\n");
fprintf (stream, "\tif (--count != 0) return;\n");
fprintf (stream, "\tp = dtors;\n");
fprintf (stream, "\twhile (p < dtors + %d) (*p++)();\n",
destructors.number + frames);
}
fprintf (stream, "}\n");
if (shared_obj)
{
COLLECT_SHARED_INIT_FUNC(stream, initname);
COLLECT_SHARED_FINI_FUNC(stream, fininame);
}
}
/* Write the constructor/destructor tables. */
#ifndef LD_INIT_SWITCH
static void
write_c_file_glob (stream, name)
FILE *stream;
const char *name ATTRIBUTE_UNUSED;
{
/* Write the tables as C code */
int frames = (frame_tables.number > 0);
fprintf (stream, "typedef void entry_pt();\n\n");
write_list_with_asm (stream, "extern entry_pt ", constructors.first);
if (frames)
{
write_list_with_asm (stream, "extern void *", frame_tables.first);
fprintf (stream, "\tstatic void *frame_table[] = {\n");
write_list (stream, "\t\t&", frame_tables.first);
fprintf (stream, "\t0\n};\n");
/* This must match what's in frame.h. */
fprintf (stream, "struct object {\n");
fprintf (stream, " void *pc_begin;\n");
fprintf (stream, " void *pc_end;\n");
fprintf (stream, " void *fde_begin;\n");
fprintf (stream, " void *fde_array;\n");
fprintf (stream, " __SIZE_TYPE__ count;\n");
fprintf (stream, " struct object *next;\n");
fprintf (stream, "};\n");
fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n");
fprintf (stream, "extern void *__deregister_frame_info (void *);\n");
fprintf (stream, "static void reg_frame () {\n");
fprintf (stream, "\tstatic struct object ob;\n");
fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n");
fprintf (stream, "\t}\n");
fprintf (stream, "static void dereg_frame () {\n");
fprintf (stream, "\t__deregister_frame_info (frame_table);\n");
fprintf (stream, "\t}\n");
}
fprintf (stream, "\nentry_pt * __CTOR_LIST__[] = {\n");
fprintf (stream, "\t(entry_pt *) %d,\n", constructors.number + frames);
write_list (stream, "\t", constructors.first);
if (frames)
fprintf (stream, "\treg_frame,\n");
fprintf (stream, "\t0\n};\n\n");
write_list_with_asm (stream, "extern entry_pt ", destructors.first);
fprintf (stream, "\nentry_pt * __DTOR_LIST__[] = {\n");
fprintf (stream, "\t(entry_pt *) %d,\n", destructors.number + frames);
write_list (stream, "\t", destructors.first);
if (frames)
fprintf (stream, "\tdereg_frame,\n");
fprintf (stream, "\t0\n};\n\n");
fprintf (stream, "extern entry_pt %s;\n", NAME__MAIN);
fprintf (stream, "entry_pt *__main_reference = %s;\n\n", NAME__MAIN);
}
#endif /* ! LD_INIT_SWITCH */
static void
write_c_file (stream, name)
FILE *stream;
const char *name;
{
fprintf (stream, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
#ifndef LD_INIT_SWITCH
if (! shared_obj)
write_c_file_glob (stream, name);
else
#endif
write_c_file_stat (stream, name);
fprintf (stream, "#ifdef __cplusplus\n}\n#endif\n");
}
#ifdef COLLECT_EXPORT_LIST
static void
write_aix_file (stream, list)
FILE *stream;
struct id *list;
{
for (; list; list = list->next)
{
fputs (list->name, stream);
putc ('\n', stream);
}
}
#endif
#ifdef OBJECT_FORMAT_NONE
/* Generic version to scan the name list of the loaded program for
the symbols g++ uses for static constructors and destructors.
The constructor table begins at __CTOR_LIST__ and contains a count
of the number of pointers (or -1 if the constructors are built in a
separate section by the linker), followed by the pointers to the
constructor functions, terminated with a null pointer. The
destructor table has the same format, and begins at __DTOR_LIST__. */
static void
scan_prog_file (prog_name, which_pass)
const char *prog_name;
enum pass which_pass;
{
void (*int_handler) PARAMS ((int));
void (*quit_handler) PARAMS ((int));
char *real_nm_argv[4];
const char **nm_argv = (const char **) real_nm_argv;
int argc = 0;
int pipe_fd[2];
char *p, buf[1024];
FILE *inf;
if (which_pass == PASS_SECOND)
return;
/* If we do not have an `nm', complain. */
if (nm_file_name == 0)
fatal ("cannot find `nm'");
nm_argv[argc++] = nm_file_name;
if (NM_FLAGS[0] != '\0')
nm_argv[argc++] = NM_FLAGS;
nm_argv[argc++] = prog_name;
nm_argv[argc++] = (char *) 0;
if (pipe (pipe_fd) < 0)
fatal_perror ("pipe");
inf = fdopen (pipe_fd[0], "r");
if (inf == (FILE *) 0)
fatal_perror ("fdopen");
/* Trace if needed. */
if (vflag)
{
const char **p_argv;
const char *str;
for (p_argv = &nm_argv[0]; (str = *p_argv) != (char *) 0; p_argv++)
fprintf (stderr, " %s", str);
fprintf (stderr, "\n");
}
fflush (stdout);
fflush (stderr);
/* Spawn child nm on pipe */
pid = vfork ();
if (pid == -1)
fatal_perror (VFORK_STRING);
if (pid == 0) /* child context */
{
/* setup stdout */
if (dup2 (pipe_fd[1], 1) < 0)
fatal_perror ("dup2 %d 1", pipe_fd[1]);
if (close (pipe_fd[0]) < 0)
fatal_perror ("close %d", pipe_fd[0]);
if (close (pipe_fd[1]) < 0)
fatal_perror ("close %d", pipe_fd[1]);
execv (nm_file_name, real_nm_argv);
fatal_perror ("execv %s", nm_file_name);
}
/* Parent context from here on. */
int_handler = (void (*) PARAMS ((int))) signal (SIGINT, SIG_IGN);
#ifdef SIGQUIT
quit_handler = (void (*) PARAMS ((int))) signal (SIGQUIT, SIG_IGN);
#endif
if (close (pipe_fd[1]) < 0)
fatal_perror ("close %d", pipe_fd[1]);
if (debug)
fprintf (stderr, "\nnm output with constructors/destructors.\n");
/* Read each line of nm output. */
while (fgets (buf, sizeof buf, inf) != (char *) 0)
{
int ch, ch2;
char *name, *end;
/* If it contains a constructor or destructor name, add the name
to the appropriate list. */
for (p = buf; (ch = *p) != '\0' && ch != '\n' && ch != '_'; p++)
if (ch == ' ' && p[1] == 'U' && p[2] == ' ')
break;
if (ch != '_')
continue;
name = p;
/* Find the end of the symbol name.
Do not include `|', because Encore nm can tack that on the end. */
for (end = p; (ch2 = *end) != '\0' && !ISSPACE (ch2) && ch2 != '|';
end++)
continue;
*end = '\0';
switch (is_ctor_dtor (name))
{
case 1:
if (which_pass != PASS_LIB)
add_to_list (&constructors, name);
break;
case 2:
if (which_pass != PASS_LIB)
add_to_list (&destructors, name);
break;
case 3:
if (which_pass != PASS_LIB)
fatal ("init function found in object %s", prog_name);
#ifndef LD_INIT_SWITCH
add_to_list (&constructors, name);
#endif
break;
case 4:
if (which_pass != PASS_LIB)
fatal ("fini function found in object %s", prog_name);
#ifndef LD_FINI_SWITCH
add_to_list (&destructors, name);
#endif
break;
case 5:
if (which_pass != PASS_LIB)
add_to_list (&frame_tables, name);
break;
default: /* not a constructor or destructor */
continue;
}
if (debug)
fprintf (stderr, "\t%s\n", buf);
}
if (debug)
fprintf (stderr, "\n");
if (fclose (inf) != 0)
fatal_perror ("fclose");
do_wait (nm_file_name);
signal (SIGINT, int_handler);
#ifdef SIGQUIT
signal (SIGQUIT, quit_handler);
#endif
}
#if SUNOS4_SHARED_LIBRARIES
/* Routines to scan the SunOS 4 _DYNAMIC structure to find shared libraries
that the output file depends upon and their initialization/finalization
routines, if any. */
#include <a.out.h>
#include <fcntl.h>
#include <link.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <unistd.h>
#include <sys/dir.h>
/* pointers to the object file */
unsigned object; /* address of memory mapped file */
unsigned objsize; /* size of memory mapped to file */
char * code; /* pointer to code segment */
char * data; /* pointer to data segment */
struct nlist *symtab; /* pointer to symbol table */
struct link_dynamic *ld;
struct link_dynamic_2 *ld_2;
struct head libraries;
/* Map the file indicated by NAME into memory and store its address. */
static void mapfile PARAMS ((const char *));
static void
mapfile (name)
const char *name;
{
int fp;
struct stat s;
if ((fp = open (name, O_RDONLY)) == -1)
fatal ("unable to open file '%s'", name);
if (fstat (fp, &s) == -1)
fatal ("unable to stat file '%s'", name);
objsize = s.st_size;
object = (unsigned) mmap (0, objsize, PROT_READ|PROT_WRITE, MAP_PRIVATE,
fp, 0);
if (object == (unsigned)-1)
fatal ("unable to mmap file '%s'", name);
close (fp);
}
/* Helpers for locatelib. */
static const char *libname;
static int libselect PARAMS ((struct direct *));
static int
libselect (d)
struct direct *d;
{
return (strncmp (libname, d->d_name, strlen (libname)) == 0);
}
/* If one file has an additional numeric extension past LIBNAME, then put
that one first in the sort. If both files have additional numeric
extensions, then put the one with the higher number first in the sort.
We must verify that the extension is numeric, because Sun saves the
original versions of patched libraries with a .FCS extension. Files with
invalid extensions must go last in the sort, so that they will not be used. */
static int libcompare PARAMS ((struct direct **, struct direct **));
static int
libcompare (d1, d2)
struct direct **d1, **d2;
{
int i1, i2 = strlen (libname);
char *e1 = (*d1)->d_name + i2;
char *e2 = (*d2)->d_name + i2;
while (*e1 && *e2 && *e1 == '.' && *e2 == '.'
&& e1[1] && ISDIGIT (e1[1]) && e2[1] && ISDIGIT (e2[1]))
{
++e1;
++e2;
i1 = strtol (e1, &e1, 10);
i2 = strtol (e2, &e2, 10);
if (i1 != i2)
return i1 - i2;
}
if (*e1)
{
/* It has a valid numeric extension, prefer this one. */
if (*e1 == '.' && e1[1] && ISDIGIT (e1[1]))
return 1;
/* It has an invalid numeric extension, must prefer the other one. */
else
return -1;
}
else if (*e2)
{
/* It has a valid numeric extension, prefer this one. */
if (*e2 == '.' && e2[1] && ISDIGIT (e2[1]))
return -1;
/* It has an invalid numeric extension, must prefer the other one. */
else
return 1;
}
else
return 0;
}
/* Given the name NAME of a dynamic dependency, find its pathname and add
it to the list of libraries. */
static void locatelib PARAMS ((const char *));
static void
locatelib (name)
const char *name;
{
static const char **l;
static int cnt;
char buf[MAXPATHLEN];
char *p, *q;
const char **pp;
if (l == 0)
{
char *ld_rules;
char *ldr = 0;
/* counting elements in array, need 1 extra for null */
cnt = 1;
ld_rules = (char *) (ld_2->ld_rules + code);
if (ld_rules)
{
cnt++;
for (; *ld_rules != 0; ld_rules++)
if (*ld_rules == ':')
cnt++;
ld_rules = (char *) (ld_2->ld_rules + code);
ldr = xstrdup (ld_rules);
}
p = getenv ("LD_LIBRARY_PATH");
q = 0;
if (p)
{
cnt++;
for (q = p ; *q != 0; q++)
if (*q == ':')
cnt++;
q = xstrdup (p);
}
l = (const char **) xmalloc ((cnt + 3) * sizeof (char *));
pp = l;
if (ldr)
{
*pp++ = ldr;
for (; *ldr != 0; ldr++)
if (*ldr == ':')
{
*ldr++ = 0;
*pp++ = ldr;
}
}
if (q)
{
*pp++ = q;
for (; *q != 0; q++)
if (*q == ':')
{
*q++ = 0;
*pp++ = q;
}
}
/* built in directories are /lib, /usr/lib, and /usr/local/lib */
*pp++ = "/lib";
*pp++ = "/usr/lib";
*pp++ = "/usr/local/lib";
*pp = 0;
}
libname = name;
for (pp = l; *pp != 0 ; pp++)
{
struct direct **namelist;
int entries;
if ((entries = scandir (*pp, &namelist, libselect, libcompare)) > 0)
{
sprintf (buf, "%s/%s", *pp, namelist[entries - 1]->d_name);
add_to_list (&libraries, buf);
if (debug)
fprintf (stderr, "%s\n", buf);
break;
}
}
if (*pp == 0)
{
if (debug)
notice ("not found\n");
else
fatal ("dynamic dependency %s not found", name);
}
}
/* Scan the _DYNAMIC structure of the output file to find shared libraries
that it depends upon and any constructors or destructors they contain. */
static void
scan_libraries (prog_name)
const char *prog_name;
{
struct exec *header;
char *base;
struct link_object *lo;
char buff[MAXPATHLEN];
struct id *list;
mapfile (prog_name);
header = (struct exec *)object;
if (N_BADMAG (*header))
fatal ("bad magic number in file '%s'", prog_name);
if (header->a_dynamic == 0)
return;
code = (char *) (N_TXTOFF (*header) + (long) header);
data = (char *) (N_DATOFF (*header) + (long) header);
symtab = (struct nlist *) (N_SYMOFF (*header) + (long) header);
if (header->a_magic == ZMAGIC && header->a_entry == 0x20)
{
/* shared object */
ld = (struct link_dynamic *) (symtab->n_value + code);
base = code;
}
else
{
/* executable */
ld = (struct link_dynamic *) data;
base = code-PAGSIZ;
}
if (debug)
notice ("dynamic dependencies.\n");
ld_2 = (struct link_dynamic_2 *) ((long) ld->ld_un.ld_2 + (long)base);
for (lo = (struct link_object *) ld_2->ld_need; lo;
lo = (struct link_object *) lo->lo_next)
{
char *name;
lo = (struct link_object *) ((long) lo + code);
name = (char *) (code + lo->lo_name);
if (lo->lo_library)
{
if (debug)
fprintf (stderr, "\t-l%s.%d => ", name, lo->lo_major);
sprintf (buff, "lib%s.so.%d.%d", name, lo->lo_major, lo->lo_minor);
locatelib (buff);
}
else
{
if (debug)
fprintf (stderr, "\t%s\n", name);
add_to_list (&libraries, name);
}
}
if (debug)
fprintf (stderr, "\n");
/* now iterate through the library list adding their symbols to
the list. */
for (list = libraries.first; list; list = list->next)
scan_prog_file (list->name, PASS_LIB);
}
#else /* SUNOS4_SHARED_LIBRARIES */
#ifdef LDD_SUFFIX
/* Use the List Dynamic Dependencies program to find shared libraries that
the output file depends upon and their initialization/finalization
routines, if any. */
static void
scan_libraries (prog_name)
const char *prog_name;
{
static struct head libraries; /* list of shared libraries found */
struct id *list;
void (*int_handler) PARAMS ((int));
void (*quit_handler) PARAMS ((int));
char *real_ldd_argv[4];
const char **ldd_argv = (const char **) real_ldd_argv;
int argc = 0;
int pipe_fd[2];
char buf[1024];
FILE *inf;
/* If we do not have an `ldd', complain. */
if (ldd_file_name == 0)
{
error ("cannot find `ldd'");
return;
}
ldd_argv[argc++] = ldd_file_name;
ldd_argv[argc++] = prog_name;
ldd_argv[argc++] = (char *) 0;
if (pipe (pipe_fd) < 0)
fatal_perror ("pipe");
inf = fdopen (pipe_fd[0], "r");
if (inf == (FILE *) 0)
fatal_perror ("fdopen");
/* Trace if needed. */
if (vflag)
{
const char **p_argv;
const char *str;
for (p_argv = &ldd_argv[0]; (str = *p_argv) != (char *) 0; p_argv++)
fprintf (stderr, " %s", str);
fprintf (stderr, "\n");
}
fflush (stdout);
fflush (stderr);
/* Spawn child ldd on pipe */
pid = vfork ();
if (pid == -1)
fatal_perror (VFORK_STRING);
if (pid == 0) /* child context */
{
/* setup stdout */
if (dup2 (pipe_fd[1], 1) < 0)
fatal_perror ("dup2 %d 1", pipe_fd[1]);
if (close (pipe_fd[0]) < 0)
fatal_perror ("close %d", pipe_fd[0]);
if (close (pipe_fd[1]) < 0)
fatal_perror ("close %d", pipe_fd[1]);
execv (ldd_file_name, real_ldd_argv);
fatal_perror ("execv %s", ldd_file_name);
}
/* Parent context from here on. */
int_handler = (void (*) PARAMS ((int))) signal (SIGINT, SIG_IGN);
#ifdef SIGQUIT
quit_handler = (void (*) PARAMS ((int))) signal (SIGQUIT, SIG_IGN);
#endif
if (close (pipe_fd[1]) < 0)
fatal_perror ("close %d", pipe_fd[1]);
if (debug)
notice ("\nldd output with constructors/destructors.\n");
/* Read each line of ldd output. */
while (fgets (buf, sizeof buf, inf) != (char *) 0)
{
int ch2;
char *name, *end, *p = buf;
/* Extract names of libraries and add to list. */
PARSE_LDD_OUTPUT (p);
if (p == 0)
continue;
name = p;
if (strncmp (name, "not found", sizeof ("not found") - 1) == 0)
fatal ("dynamic dependency %s not found", buf);
/* Find the end of the symbol name. */
for (end = p;
(ch2 = *end) != '\0' && ch2 != '\n' && !ISSPACE (ch2) && ch2 != '|';
end++)
continue;
*end = '\0';
if (access (name, R_OK) == 0)
add_to_list (&libraries, name);
else
fatal ("unable to open dynamic dependency '%s'", buf);
if (debug)
fprintf (stderr, "\t%s\n", buf);
}
if (debug)
fprintf (stderr, "\n");
if (fclose (inf) != 0)
fatal_perror ("fclose");
do_wait (ldd_file_name);
signal (SIGINT, int_handler);
#ifdef SIGQUIT
signal (SIGQUIT, quit_handler);
#endif
/* now iterate through the library list adding their symbols to
the list. */
for (list = libraries.first; list; list = list->next)
scan_prog_file (list->name, PASS_LIB);
}
#endif /* LDD_SUFFIX */
#endif /* SUNOS4_SHARED_LIBRARIES */
#endif /* OBJECT_FORMAT_NONE */
/*
* COFF specific stuff.
*/
#ifdef OBJECT_FORMAT_COFF
#if defined (EXTENDED_COFF)
# define GCC_SYMBOLS(X) (SYMHEADER(X).isymMax + SYMHEADER(X).iextMax)
# define GCC_SYMENT SYMR
# define GCC_OK_SYMBOL(X) ((X).st == stProc || (X).st == stGlobal)
# define GCC_SYMINC(X) (1)
# define GCC_SYMZERO(X) (SYMHEADER(X).isymMax)
# define GCC_CHECK_HDR(X) (PSYMTAB(X) != 0)
#else
# define GCC_SYMBOLS(X) (HEADER(ldptr).f_nsyms)
# define GCC_SYMENT SYMENT
# if defined (C_WEAKEXT)
# define GCC_OK_SYMBOL(X) \
(((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
((X).n_scnum > N_UNDEF) && \
(aix64_flag \
|| (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
|| ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
# define GCC_UNDEF_SYMBOL(X) \
(((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
((X).n_scnum == N_UNDEF))
# else
# define GCC_OK_SYMBOL(X) \
(((X).n_sclass == C_EXT) && \
((X).n_scnum > N_UNDEF) && \
(aix64_flag \
|| (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
|| ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
# define GCC_UNDEF_SYMBOL(X) \
(((X).n_sclass == C_EXT) && ((X).n_scnum == N_UNDEF))
# endif
# define GCC_SYMINC(X) ((X).n_numaux+1)
# define GCC_SYMZERO(X) 0
/* 0757 = U803XTOCMAGIC (AIX 4.3) and 0767 = U64_TOCMAGIC (AIX V5) */
#ifdef _AIX51
# define GCC_CHECK_HDR(X) \
((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
|| (HEADER (X).f_magic == 0767 && aix64_flag))
#else
# define GCC_CHECK_HDR(X) \
((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
|| (HEADER (X).f_magic == 0757 && aix64_flag))
#endif
#endif
extern char *ldgetname ();
/* COFF version to scan the name list of the loaded program for
the symbols g++ uses for static constructors and destructors.
The constructor table begins at __CTOR_LIST__ and contains a count
of the number of pointers (or -1 if the constructors are built in a
separate section by the linker), followed by the pointers to the
constructor functions, terminated with a null pointer. The
destructor table has the same format, and begins at __DTOR_LIST__. */
static void
scan_prog_file (prog_name, which_pass)
const char *prog_name;
enum pass which_pass;
{
LDFILE *ldptr = NULL;
int sym_index, sym_count;
int is_shared = 0;
if (which_pass != PASS_FIRST && which_pass != PASS_OBJ)
return;
#ifdef COLLECT_EXPORT_LIST
/* We do not need scanning for some standard C libraries. */
if (which_pass == PASS_FIRST && ignore_library (prog_name))
return;
/* On AIX we have a loop, because there is not much difference
between an object and an archive. This trick allows us to
eliminate scan_libraries() function. */
do
{
#endif
/* Some platforms (e.g. OSF4) declare ldopen as taking a
non-const char * filename parameter, even though it will not
modify that string. So we must cast away const-ness here,
which will cause -Wcast-qual to burp. */
if ((ldptr = ldopen ((char *)prog_name, ldptr)) != NULL)
{
if (! MY_ISCOFF (HEADER (ldptr).f_magic))
fatal ("%s: not a COFF file", prog_name);
if (GCC_CHECK_HDR (ldptr))
{
sym_count = GCC_SYMBOLS (ldptr);
sym_index = GCC_SYMZERO (ldptr);
#ifdef COLLECT_EXPORT_LIST
/* Is current archive member a shared object? */
is_shared = HEADER (ldptr).f_flags & F_SHROBJ;
#endif
while (sym_index < sym_count)
{
GCC_SYMENT symbol;
if (ldtbread (ldptr, sym_index, &symbol) <= 0)
break;
sym_index += GCC_SYMINC (symbol);
if (GCC_OK_SYMBOL (symbol))
{
char *name;
if ((name = ldgetname (ldptr, &symbol)) == NULL)
continue; /* should never happen */
#ifdef XCOFF_DEBUGGING_INFO
/* All AIX function names have a duplicate entry
beginning with a dot. */
if (*name == '.')
++name;
#endif
switch (is_ctor_dtor (name))
{
case 1:
if (! is_shared)
add_to_list (&constructors, name);
#ifdef COLLECT_EXPORT_LIST
if (which_pass == PASS_OBJ)
add_to_list (&exports, name);
#endif
break;
case 2:
if (! is_shared)
add_to_list (&destructors, name);
#ifdef COLLECT_EXPORT_LIST
if (which_pass == PASS_OBJ)
add_to_list (&exports, name);
#endif
break;
#ifdef COLLECT_EXPORT_LIST
case 3:
#ifndef LD_INIT_SWITCH
if (is_shared)
add_to_list (&constructors, name);
#endif
break;
case 4:
#ifndef LD_INIT_SWITCH
if (is_shared)
add_to_list (&destructors, name);
#endif
break;
#endif
case 5:
if (! is_shared)
add_to_list (&frame_tables, name);
#ifdef COLLECT_EXPORT_LIST
if (which_pass == PASS_OBJ)
add_to_list (&exports, name);
#endif
break;
default: /* not a constructor or destructor */
#ifdef COLLECT_EXPORT_LIST
/* If we are building a shared object on AIX we need
to explicitly export all global symbols. */
if (shared_obj)
{
if (which_pass == PASS_OBJ && (! export_flag))
add_to_list (&exports, name);
}
#endif
continue;
}
if (debug)
#if !defined(EXTENDED_COFF)
fprintf (stderr, "\tsec=%d class=%d type=%s%o %s\n",
symbol.n_scnum, symbol.n_sclass,
(symbol.n_type ? "0" : ""), symbol.n_type,
name);
#else
fprintf (stderr,
"\tiss = %5d, value = %5ld, index = %5d, name = %s\n",
symbol.iss, (long) symbol.value, symbol.index, name);
#endif
}
}
}
#ifdef COLLECT_EXPORT_LIST
else
{
/* If archive contains both 32-bit and 64-bit objects,
we want to skip objects in other mode so mismatch normal. */
if (debug)
fprintf (stderr, "%s : magic=%o aix64=%d mismatch\n",
prog_name, HEADER (ldptr).f_magic, aix64_flag);
}
#endif
}
else
{
fatal ("%s: cannot open as COFF file", prog_name);
}
#ifdef COLLECT_EXPORT_LIST
/* On AIX loop continues while there are more members in archive. */
}
while (ldclose (ldptr) == FAILURE);
#else
/* Otherwise we simply close ldptr. */
(void) ldclose(ldptr);
#endif
}
#endif /* OBJECT_FORMAT_COFF */
#ifdef COLLECT_EXPORT_LIST
/* Given a library name without "lib" prefix, this function
returns a full library name including a path. */
static char *
resolve_lib_name (name)
const char *name;
{
char *lib_buf;
int i, j, l = 0;
for (i = 0; libpaths[i]; i++)
if (libpaths[i]->max_len > l)
l = libpaths[i]->max_len;
lib_buf = xmalloc (l + strlen(name) + 10);
for (i = 0; libpaths[i]; i++)
{
struct prefix_list *list = libpaths[i]->plist;
for (; list; list = list->next)
{
/* The following lines are needed because path_prefix list
may contain directories both with trailing '/' and
without it. */
const char *p = "";
if (list->prefix[strlen(list->prefix)-1] != '/')
p = "/";
for (j = 0; libexts[j]; j++)
{
sprintf (lib_buf, "%s%slib%s.%s",
list->prefix, p, name, libexts[j]);
if (debug) fprintf (stderr, "searching for: %s\n", lib_buf);
if (file_exists (lib_buf))
{
if (debug) fprintf (stderr, "found: %s\n", lib_buf);
return (lib_buf);
}
}
}
}
if (debug)
fprintf (stderr, "not found\n");
else
fatal ("library lib%s not found", name);
return (NULL);
}
/* Array of standard AIX libraries which should not
be scanned for ctors/dtors. */
static const char *const aix_std_libs[] = {
"/unix",
"/lib/libc.a",
"/lib/libm.a",
"/lib/libc_r.a",
"/lib/libm_r.a",
"/usr/lib/libc.a",
"/usr/lib/libm.a",
"/usr/lib/libc_r.a",
"/usr/lib/libm_r.a",
"/usr/lib/threads/libc.a",
"/usr/ccs/lib/libc.a",
"/usr/ccs/lib/libm.a",
"/usr/ccs/lib/libc_r.a",
"/usr/ccs/lib/libm_r.a",
NULL
};
/* This function checks the filename and returns 1
if this name matches the location of a standard AIX library. */
static int
ignore_library (name)
const char *name;
{
const char *const *p = &aix_std_libs[0];
while (*p++ != NULL)
if (! strcmp (name, *p)) return 1;
return 0;
}
#endif /* COLLECT_EXPORT_LIST */
/*
* OSF/rose specific stuff.
*/
#ifdef OBJECT_FORMAT_ROSE
/* Union of the various load commands */
typedef union load_union
{
ldc_header_t hdr; /* common header */
load_cmd_map_command_t map; /* map indexing other load cmds */
interpreter_command_t iprtr; /* interpreter pathname */
strings_command_t str; /* load commands strings section */
region_command_t region; /* region load command */
reloc_command_t reloc; /* relocation section */
package_command_t pkg; /* package load command */
symbols_command_t sym; /* symbol sections */
entry_command_t ent; /* program start section */
gen_info_command_t info; /* object information */
func_table_command_t func; /* function constructors/destructors */
} load_union_t;
/* Structure to point to load command and data section in memory. */
typedef struct load_all
{
load_union_t *load; /* load command */
char *section; /* pointer to section */
} load_all_t;
/* Structure to contain information about a file mapped into memory. */
struct file_info
{
char *start; /* start of map */
char *name; /* filename */
long size; /* size of the file */
long rounded_size; /* size rounded to page boundary */
int fd; /* file descriptor */
int rw; /* != 0 if opened read/write */
int use_mmap; /* != 0 if mmap'ed */
};
extern int decode_mach_o_hdr ();
extern int encode_mach_o_hdr ();
static void add_func_table PARAMS ((mo_header_t *, load_all_t *,
symbol_info_t *, int));
static void print_header PARAMS ((mo_header_t *));
static void print_load_command PARAMS ((load_union_t *, size_t, int));
static void bad_header PARAMS ((int));
static struct file_info *read_file PARAMS ((const char *, int, int));
static void end_file PARAMS ((struct file_info *));
/* OSF/rose specific version to scan the name list of the loaded
program for the symbols g++ uses for static constructors and
destructors.
The constructor table begins at __CTOR_LIST__ and contains a count
of the number of pointers (or -1 if the constructors are built in a
separate section by the linker), followed by the pointers to the
constructor functions, terminated with a null pointer. The
destructor table has the same format, and begins at __DTOR_LIST__. */
static void
scan_prog_file (prog_name, which_pass)
const char *prog_name;
enum pass which_pass;
{
char *obj;
mo_header_t hdr;
load_all_t *load_array;
load_all_t *load_end;
load_all_t *load_cmd;
int symbol_load_cmds;
off_t offset;
int i;
int num_syms;
int status;
char *str_sect;
struct file_info *obj_file;
int prog_fd;
mo_lcid_t cmd_strings = -1;
symbol_info_t *main_sym = 0;
int rw = (which_pass != PASS_FIRST);
prog_fd = open (prog_name, (rw) ? O_RDWR : O_RDONLY);
if (prog_fd < 0)
fatal_perror ("open %s", prog_name);
obj_file = read_file (prog_name, prog_fd, rw);
obj = obj_file->start;
status = decode_mach_o_hdr (obj, MO_SIZEOF_RAW_HDR, MOH_HEADER_VERSION, &hdr);
if (status != MO_HDR_CONV_SUCCESS)
bad_header (status);
/* Do some basic sanity checks. Note we explicitly use the big endian magic number,
since the hardware will automatically swap bytes for us on loading little endian
integers. */
#ifndef CROSS_COMPILE
if (hdr.moh_magic != MOH_MAGIC_MSB
|| hdr.moh_header_version != MOH_HEADER_VERSION
|| hdr.moh_byte_order != OUR_BYTE_ORDER
|| hdr.moh_data_rep_id != OUR_DATA_REP_ID
|| hdr.moh_cpu_type != OUR_CPU_TYPE
|| hdr.moh_cpu_subtype != OUR_CPU_SUBTYPE
|| hdr.moh_vendor_type != OUR_VENDOR_TYPE)
{
fatal ("incompatibilities between object file & expected values");
}
#endif
if (debug)
print_header (&hdr);
offset = hdr.moh_first_cmd_off;
load_end = load_array
= (load_all_t *) xcalloc (sizeof (load_all_t), hdr.moh_n_load_cmds + 2);
/* Build array of load commands, calculating the offsets */
for (i = 0; i < hdr.moh_n_load_cmds; i++)
{
load_union_t *load_hdr; /* load command header */
load_cmd = load_end++;
load_hdr = (load_union_t *) (obj + offset);
/* If modifying the program file, copy the header. */
if (rw)
{
load_union_t *ptr = (load_union_t *) xmalloc (load_hdr->hdr.ldci_cmd_size);
memcpy ((char *)ptr, (char *)load_hdr, load_hdr->hdr.ldci_cmd_size);
load_hdr = ptr;
/* null out old command map, because we will rewrite at the end. */
if (ptr->hdr.ldci_cmd_type == LDC_CMD_MAP)
{
cmd_strings = ptr->map.lcm_ld_cmd_strings;
ptr->hdr.ldci_cmd_type = LDC_UNDEFINED;
}
}
load_cmd->load = load_hdr;
if (load_hdr->hdr.ldci_section_off > 0)
load_cmd->section = obj + load_hdr->hdr.ldci_section_off;
if (debug)
print_load_command (load_hdr, offset, i);
offset += load_hdr->hdr.ldci_cmd_size;
}
/* If the last command is