From c482518380683ee38d14024c1e362a0d681cf967 Mon Sep 17 00:00:00 2001 From: Niklas Hallqvist Date: Wed, 20 Dec 1995 01:06:22 +0000 Subject: FSF GCC version 2.7.2 --- gnu/usr.bin/gcc/collect2.c | 3409 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 3409 insertions(+) create mode 100644 gnu/usr.bin/gcc/collect2.c (limited to 'gnu/usr.bin/gcc/collect2.c') diff --git a/gnu/usr.bin/gcc/collect2.c b/gnu/usr.bin/gcc/collect2.c new file mode 100644 index 00000000000..a74a7f06992 --- /dev/null +++ b/gnu/usr.bin/gcc/collect2.c @@ -0,0 +1,3409 @@ +/* Collect static initialization info into data structures + that can be traversed by C++ initialization and finalization + routines. + + Copyright (C) 1992, 1993, 1994, 1995 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 GNU CC. + +GNU CC 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. + +GNU CC 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 GNU CC; 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 +#include +#include +#include +#include +#include +#include +#ifdef NO_WAIT_H +#include +#endif + +#define COLLECT + +#include "demangle.h" +#include "obstack.h" + +#ifndef errno +extern int errno; +#endif + +#ifndef HAVE_STRERROR +#if defined(bsd4_4) +extern const char *const sys_errlist[]; +#else +extern char *sys_errlist[]; +#endif +extern int sys_nerr; +#else +char *strerror(); +#endif + +/* Obstack allocation and deallocation routines. */ +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free free + +#if !defined (__STDC__) && !defined (const) +#define const +#endif + +#ifdef USG +#define vfork fork +#endif + +/* Add prototype support. */ +#ifndef PROTO +#if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__) +#define PROTO(ARGS) ARGS +#else +#define PROTO(ARGS) () +#endif +#endif + +#ifndef R_OK +#define R_OK 4 +#define W_OK 2 +#define X_OK 1 +#endif + +#ifndef WIFSIGNALED +#define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f) +#endif +#ifndef WTERMSIG +#define WTERMSIG(S) ((S) & 0x7f) +#endif +#ifndef WIFEXITED +#define WIFEXITED(S) (((S) & 0xff) == 0) +#endif +#ifndef WEXITSTATUS +#define WEXITSTATUS(S) (((S) & 0xff00) >> 8) +#endif + +/* On MSDOS, write temp files in current dir + because there's no place else we can expect to use. */ +#ifdef __MSDOS__ +#ifndef P_tmpdir +#define P_tmpdir "./" +#endif +#endif + +/* 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 aren't 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 can't 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 isn't 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 +#include + +#ifdef UMAX +#include +#endif + +/* Many versions of ldfcn.h define these. */ +#ifdef FREAD +#undef FREAD +#undef FWRITE +#endif + +#include + +/* 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 + +#ifdef XCOFF_DEBUGGING_INFO +#define XCOFF_SCAN_LIBS +#endif + +#endif /* OBJECT_FORMAT_COFF */ + +#ifdef OBJECT_FORMAT_ROSE + +#ifdef _OSF_SOURCE +#define USE_MMAP +#endif + +#ifdef USE_MMAP +#include +#endif + +#include +#include +#include +#include +#include + +#endif /* OBJECT_FORMAT_ROSE */ + +#ifdef OBJECT_FORMAT_NONE + +/* Default flags to pass to nm. */ +#ifndef NM_FLAGS +#define NM_FLAGS "-p" +#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. You + must define both, or neither. */ +#ifndef NAME__MAIN +#define NAME__MAIN "__main" +#define SYMBOL__MAIN __main +#endif + +#if defined (LDD_SUFFIX) || SUNOS4_SHARED_LIBRARIES || defined(XCOFF_SCAN_LIBS) +#define SCAN_LIBRARIES +#endif + +#ifdef USE_COLLECT2 +int do_collecting = 1; +#else +int do_collecting = 0; +#endif + +/* 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 */ +}; + +#ifndef NO_SYS_SIGLIST +#ifndef DONT_DECLARE_SYS_SIGLIST +extern char *sys_siglist[]; +#endif +#endif +extern char *version_string; + +int vflag; /* true if -v */ +static int rflag; /* true if -r */ +static int strip_flag; /* true if -s */ + +int debug; /* true if -debug */ + +static int shared_obj; /* true if -shared */ + +static int temp_filename_length; /* Length of temp_filename */ +static char *temp_filename; /* Base of temp filenames */ +static char *c_file; /* .c for constructor/destructor list. */ +static char *o_file; /* .o for constructor/destructor list. */ +static char *export_file; /* .x for AIX export list. */ +static int auto_export = 1; /* true if exporting everything. */ +char *ldout; /* File for ld errors. */ +static char *output_file; /* Output file for ld. */ +static char *nm_file_name; /* pathname of nm */ +static char *ldd_file_name; /* pathname of ldd (or equivalent) */ +static char *strip_file_name; /* pathname of strip */ +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 */ +static struct head exports; /* list of exported symbols */ + +struct obstack temporary_obstack; +struct obstack permanent_obstack; +char * temporary_firstobj; + +/* Defined in the automatically-generated underscore.c. */ +extern int prepends_underscore; + +extern char *getenv (); +extern char *mktemp (); +extern FILE *fdopen (); + +/* Structure to hold all the directories in which to search for files to + execute. */ + +struct prefix_list +{ + 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 */ + char *name; /* Name of this list (used in config stuff) */ +}; + +void collect_exit PROTO((int)); +void collect_execute PROTO((char *, char **, char *)); +void dump_file PROTO((char *)); +static void handler PROTO((int)); +static int is_ctor_dtor PROTO((char *)); +static void choose_temp_base PROTO((void)); +static int is_in_prefix_list PROTO((struct path_prefix *, char *, int)); +static char *find_a_file PROTO((struct path_prefix *, char *)); +static void add_prefix PROTO((struct path_prefix *, char *)); +static void prefix_from_env PROTO((char *, struct path_prefix *)); +static void prefix_from_string PROTO((char *, struct path_prefix *)); +static void do_wait PROTO((char *)); +static void fork_execute PROTO((char *, char **)); +static void maybe_unlink PROTO((char *)); +static void add_to_list PROTO((struct head *, char *)); +static void write_list PROTO((FILE *, char *, struct id *)); +static void write_list_with_asm PROTO((FILE *, char *, struct id *)); +static void write_c_file PROTO((FILE *, char *)); +static void write_export_file PROTO((FILE *)); +static void scan_prog_file PROTO((char *, enum pass)); +static void scan_libraries PROTO((char *)); + +char *xcalloc (); +char *xmalloc (); + +extern char *index (); +extern char *rindex (); +extern void free (); + +#ifdef NO_DUP2 +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 + +char * +my_strerror (e) + int e; +{ + +#ifdef HAVE_STRERROR + return strerror (e); + +#else + + static char buffer[30]; + if (!e) + return ""; + + if (e > 0 && e < sys_nerr) + return sys_errlist[e]; + + sprintf (buffer, "Unknown error %d", e); + return buffer; +#endif +} + +/* 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); + + if (export_file != 0 && export_file[0]) + maybe_unlink (export_file); + + 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); +} + + +/* Die when sys call fails. */ + +void +fatal_perror (string, arg1, arg2, arg3) + char *string, *arg1, *arg2, *arg3; +{ + int e = errno; + + fprintf (stderr, "collect2: "); + fprintf (stderr, string, arg1, arg2, arg3); + fprintf (stderr, ": %s\n", my_strerror (e)); + collect_exit (1); +} + +/* Just die. */ + +void +fatal (string, arg1, arg2, arg3) + char *string, *arg1, *arg2, *arg3; +{ + fprintf (stderr, "collect2: "); + fprintf (stderr, string, arg1, arg2, arg3); + fprintf (stderr, "\n"); + collect_exit (1); +} + +/* Write error message. */ + +void +error (string, arg1, arg2, arg3, arg4) + char *string, *arg1, *arg2, *arg3, *arg4; +{ + fprintf (stderr, "collect2: "); + fprintf (stderr, string, arg1, arg2, arg3, arg4); + fprintf (stderr, "\n"); +} + +/* 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); + + signal (signo, SIG_DFL); + kill (getpid (), signo); +} + + +char * +xcalloc (size1, size2) + int size1, size2; +{ + char *ptr = (char *) calloc (size1, size2); + if (ptr) + return ptr; + + fatal ("out of memory"); + return (char *)0; +} + +char * +xmalloc (size) + unsigned size; +{ + char *ptr = (char *) malloc (size); + if (ptr) + return ptr; + + fatal ("out of memory"); + return (char *)0; +} + +char * +xrealloc (ptr, size) + char *ptr; + unsigned size; +{ + register char *value = (char *) realloc (ptr, size); + if (value == 0) + fatal ("virtual memory exhausted"); + return value; +} + +int +file_exists (name) + char *name; +{ + return access (name, R_OK) == 0; +} + +/* Make a copy of a string INPUT with size SIZE. */ + +char * +savestring (input, size) + char *input; + int size; +{ + char *output = (char *) xmalloc (size + 1); + bcopy (input, output, size); + output[size] = 0; + return output; +} + +void +dump_file (name) + char *name; +{ + FILE *stream = fopen (name, "r"); + int no_demangle = !! getenv ("COLLECT_NO_DEMANGLE"); + + if (stream == 0) + return; + while (1) + { + int c; + while (c = getc (stream), + c != EOF && (isalnum (c) || c == '_' || c == '$' || c == '.')) + obstack_1grow (&temporary_obstack, c); + if (obstack_object_size (&temporary_obstack) > 0) + { + char *word, *p, *result; + obstack_1grow (&temporary_obstack, '\0'); + word = obstack_finish (&temporary_obstack); + + if (*word == '.') + ++word, putc ('.', stderr); + p = word; + if (*p == '_' && prepends_underscore) + ++p; + + if (no_demangle) + result = 0; + else + result = cplus_demangle (p, DMGL_PARAMS | DMGL_ANSI); + + if (result) + { + int diff; + fputs (result, stderr); + + diff = strlen (word) - strlen (result); + while (diff > 0) + --diff, putc (' ', stderr); + while (diff < 0 && c == ' ') + ++diff, c = getc (stream); + + free (result); + } + else + fputs (word, stderr); + + fflush (stderr); + obstack_free (&temporary_obstack, temporary_firstobj); + } + if (c == EOF) + break; + putc (c, stderr); + } +} + +/* Decide whether the given symbol is: + a constructor (1), a destructor (2), or neither (0). */ + +static int +is_ctor_dtor (s) + char *s; +{ + struct names { char *name; int len; int ret; int two_underscores; }; + + register struct names *p; + register int ch; + register char *orig_s = s; + + static struct names special[] = { +#ifdef NO_DOLLAR_IN_LABEL +#ifdef NO_DOT_IN_LABEL + { "GLOBAL__I_", sizeof ("GLOBAL__I_")-1, 1, 0 }, + { "GLOBAL__D_", sizeof ("GLOBAL__D_")-1, 2, 0 }, +#else + { "GLOBAL_.I.", sizeof ("GLOBAL_.I.")-1, 1, 0 }, + { "GLOBAL_.D.", sizeof ("GLOBAL_.D.")-1, 2, 0 }, +#endif +#else + { "GLOBAL_$I$", sizeof ("GLOBAL_$I$")-1, 1, 0 }, + { "GLOBAL_$D$", sizeof ("GLOBAL_$D$")-1, 2, 0 }, +#endif + { "GLOBAL__FI_", sizeof ("GLOBAL__FI_")-1, 3, 0 }, + { "GLOBAL__FD_", sizeof ("GLOBAL__FD_")-1, 4, 0 }, +#ifdef CFRONT_LOSSAGE /* Don't 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; +} + + +/* Compute a string to use as the base of all temporary file names. + It is substituted for %g. */ + +static void +choose_temp_base () +{ + char *base = getenv ("TMPDIR"); + int len; + + if (base == (char *)0) + { +#ifdef P_tmpdir + if (access (P_tmpdir, R_OK | W_OK) == 0) + base = P_tmpdir; +#endif + if (base == (char *)0) + { + if (access ("/usr/tmp", R_OK | W_OK) == 0) + base = "/usr/tmp/"; + else + base = "/tmp/"; + } + } + + len = strlen (base); + temp_filename = xmalloc (len + sizeof("/ccXXXXXX") + 1); + strcpy (temp_filename, base); + if (len > 0 && temp_filename[len-1] != '/') + temp_filename[len++] = '/'; + strcpy (temp_filename + len, "ccXXXXXX"); + + mktemp (temp_filename); + temp_filename_length = strlen (temp_filename); +} + +/* Routine to add variables to the environment. */ + +#ifndef HAVE_PUTENV + +int +putenv (str) + char *str; +{ +#ifndef VMS /* nor about VMS */ + + extern char **environ; + char **old_environ = environ; + char **envp; + int num_envs = 0; + int name_len = 1; + char *p = str; + int ch; + + while ((ch = *p++) != '\0' && ch != '=') + name_len++; + + if (!ch) + abort (); + + /* Search for replacing an existing environment variable, and + count the number of total environment variables. */ + for (envp = old_environ; *envp; envp++) + { + num_envs++; + if (!strncmp (str, *envp, name_len)) + { + *envp = str; + return 0; + } + } + + /* Add a new environment variable */ + environ = (char **) xmalloc (sizeof (char *) * (num_envs+2)); + *environ = str; + bcopy ((char *) old_environ, (char *) (environ + 1), + sizeof (char *) * (num_envs+1)); + + return 0; +#endif /* VMS */ +} + +#endif /* HAVE_PUTENV */ + +/* By default, colon separates directories in a path. */ +#ifndef PATH_SEPARATOR +#define PATH_SEPARATOR ':' +#endif + +/* 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 char *target_machine = TARGET_MACHINE; +#endif + +/* Names under which we were executed. Never return one of those files in our + searches. */ + +static struct path_prefix our_file_names; + +/* Determine if STRING is in PPREFIX. + + This utility is currently only used to look up file names. Prefix lists + record directory names. This matters to us because the latter has a + trailing slash, so I've added a flag to handle both. */ + +static int +is_in_prefix_list (pprefix, string, filep) + struct path_prefix *pprefix; + char *string; + int filep; +{ + struct prefix_list *pl; + + if (filep) + { + int len = strlen (string); + + for (pl = pprefix->plist; pl; pl = pl->next) + { + if (strncmp (pl->prefix, string, len) == 0 + && strcmp (pl->prefix + len, "/") == 0) + return 1; + } + } + else + { + for (pl = pprefix->plist; pl; pl = pl->next) + { + if (strcmp (pl->prefix, string) == 0) + return 1; + } + } + + return 0; +} + +/* 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; + char *name; +{ + char *temp; + struct prefix_list *pl; + int len = pprefix->max_len + strlen (name) + 1; + +#ifdef EXECUTABLE_SUFFIX + len += strlen (EXECUTABLE_SUFFIX); +#endif + + temp = xmalloc (len); + + /* Determine the filename to execute (special case for absolute paths). */ + + if (*name == '/') + { + if (access (name, X_OK) == 0) + { + strcpy (temp, name); + return temp; + } + } + else + for (pl = pprefix->plist; pl; pl = pl->next) + { + strcpy (temp, pl->prefix); + strcat (temp, name); + if (! is_in_prefix_list (&our_file_names, temp, 1) + /* This is a kludge, but there seems no way around it. */ + && strcmp (temp, "./ld") != 0 + && access (temp, X_OK) == 0) + return temp; + +#ifdef EXECUTABLE_SUFFIX + /* Some systems have a suffix for executable files. + So try appending that. */ + strcat (temp, EXECUTABLE_SUFFIX); + if (! is_in_prefix_list (&our_file_names, temp, 1) + && access (temp, X_OK) == 0) + return temp; +#endif + } + + free (temp); + return 0; +} + +/* Add an entry for PREFIX to prefix list PPREFIX. */ + +static void +add_prefix (pprefix, prefix) + struct path_prefix *pprefix; + 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 = savestring (prefix, len); + + 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) + char *env; + struct path_prefix *pprefix; +{ + char *p = getenv (env); + + if (p) + prefix_from_string (p, pprefix); +} + +static void +prefix_from_string (p, pprefix) + char *p; + struct path_prefix *pprefix; +{ + char *startp, *endp; + char *nstore = (char *) xmalloc (strlen (p) + 3); + + startp = endp = p; + while (1) + { + if (*endp == PATH_SEPARATOR || *endp == 0) + { + strncpy (nstore, startp, endp-startp); + if (endp == startp) + { + strcpy (nstore, "./"); + } + else if (endp[-1] != '/') + { + nstore[endp-startp] = '/'; + nstore[endp-startp+1] = 0; + } + else + nstore[endp-startp] = 0; + + add_prefix (pprefix, nstore); + if (*endp == 0) + break; + endp = startp = endp + 1; + } + else + endp++; + } +} + +/* Main program. */ + +int +main (argc, argv) + int argc; + char *argv[]; +{ + char *ld_suffix = "ld"; + char *full_ld_suffix = ld_suffix; + char *real_ld_suffix = "real-ld"; + char *full_real_ld_suffix = real_ld_suffix; + char *collect_ld_suffix = "collect-ld"; + char *nm_suffix = "nm"; + char *full_nm_suffix = nm_suffix; + char *gnm_suffix = "gnm"; + char *full_gnm_suffix = gnm_suffix; +#ifdef LDD_SUFFIX + char *ldd_suffix = LDD_SUFFIX; + char *full_ldd_suffix = ldd_suffix; +#endif + char *strip_suffix = "strip"; + char *full_strip_suffix = strip_suffix; + char *gstrip_suffix = "gstrip"; + char *full_gstrip_suffix = gstrip_suffix; + char *arg; + FILE *outf, *exportf; + char *ld_file_name; + char *collect_name; + char *collect_names; + char *p; + char **c_argv; + char **c_ptr; + char **ld1_argv = (char **) xcalloc (sizeof (char *), argc+3); + char **ld1 = ld1_argv; + char **ld2_argv = (char **) xcalloc (sizeof (char *), argc+6); + char **ld2 = ld2_argv; + char **object_lst = (char **) xcalloc (sizeof (char *), argc); + char **object = object_lst; + int first_file; + int num_c_args = argc+7; + +#ifdef DEBUG + debug = 1; + vflag = 1; +#endif + + output_file = "a.out"; + + obstack_begin (&temporary_obstack, 0); + obstack_begin (&permanent_obstack, 0); + temporary_firstobj = (char *) obstack_alloc (&temporary_obstack, 0); + current_demangling_style = gnu_demangling; + + /* We must check that we do not call ourselves in an infinite + recursion loop. We append the name used for us to the COLLECT_NAMES + environment variable. + + In practice, collect will rarely invoke itself. This can happen now + that we are no longer called gld. A perfect example is when running + gcc in a build directory that has been installed. When looking for + ld's, we'll find our installed version and believe that's the real ld. */ + + /* We must also append COLLECT_NAME to COLLECT_NAMES to watch for the + previous version of collect (the one that used COLLECT_NAME and only + handled two levels of recursion). If we don't we may mutually recurse + forever. This can happen (I think) when bootstrapping the old version + and a new one is installed (rare, but we should handle it). + ??? Hopefully references to COLLECT_NAME can be removed at some point. */ + + collect_name = (char *) getenv ("COLLECT_NAME"); + collect_names = (char *) getenv ("COLLECT_NAMES"); + + p = (char *) xmalloc (strlen ("COLLECT_NAMES=") + + (collect_name ? strlen (collect_name) + 1 : 0) + + (collect_names ? strlen (collect_names) + 1 : 0) + + strlen (argv[0]) + 1); + strcpy (p, "COLLECT_NAMES="); + if (collect_name != 0) + sprintf (p + strlen (p), "%s%c", collect_name, PATH_SEPARATOR); + if (collect_names != 0) + sprintf (p + strlen (p), "%s%c", collect_names, PATH_SEPARATOR); + strcat (p, argv[0]); + putenv (p); + + prefix_from_env ("COLLECT_NAMES", &our_file_names); + + /* Set environment variable COLLECT_NAME to our name so the previous version + of collect won't find us. If it does we'll mutually recurse forever. + This can happen when bootstrapping the new version and an old version is + installed. + ??? Hopefully this bit of code can be removed at some point. */ + + p = xmalloc (strlen ("COLLECT_NAME=") + strlen (argv[0]) + 1); + sprintf (p, "COLLECT_NAME=%s", argv[0]); + putenv (p); + + p = (char *) getenv ("COLLECT_GCC_OPTIONS"); + if (p) + while (*p) + { + char *q = p; + while (*q && *q != ' ') q++; + if (*p == '-' && p[1] == 'm') + num_c_args++; + + if (*q) q++; + p = q; + } + + c_ptr = 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); + +#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 took in the system directories, we need to + qualify the program name with the target machine. */ + + full_ld_suffix + = xcalloc (strlen (ld_suffix) + strlen (target_machine) + 2, 1); + strcpy (full_ld_suffix, target_machine); + strcat (full_ld_suffix, "-"); + strcat (full_ld_suffix, ld_suffix); + + full_real_ld_suffix + = xcalloc (strlen (real_ld_suffix) + strlen (target_machine) + 2, 1); + strcpy (full_real_ld_suffix, target_machine); + strcat (full_real_ld_suffix, "-"); + strcat (full_real_ld_suffix, real_ld_suffix); + +#if 0 + full_gld_suffix + = xcalloc (strlen (gld_suffix) + strlen (target_machine) + 2, 1); + strcpy (full_gld_suffix, target_machine); + strcat (full_gld_suffix, "-"); + strcat (full_gld_suffix, gld_suffix); +#endif + + full_nm_suffix + = xcalloc (strlen (nm_suffix) + strlen (target_machine) + 2, 1); + strcpy (full_nm_suffix, target_machine); + strcat (full_nm_suffix, "-"); + strcat (full_nm_suffix, nm_suffix); + + full_gnm_suffix + = xcalloc (strlen (gnm_suffix) + strlen (target_machine) + 2, 1); + strcpy (full_gnm_suffix, target_machine); + strcat (full_gnm_suffix, "-"); + strcat (full_gnm_suffix, gnm_suffix); + +#ifdef LDD_SUFFIX + full_ldd_suffix + = xcalloc (strlen (ldd_suffix) + strlen (target_machine) + 2, 1); + strcpy (full_ldd_suffix, target_machine); + strcat (full_ldd_suffix, "-"); + strcat (full_ldd_suffix, ldd_suffix); +#endif + + full_strip_suffix + = xcalloc (strlen (strip_suffix) + strlen (target_machine) + 2, 1); + strcpy (full_strip_suffix, target_machine); + strcat (full_strip_suffix, "-"); + strcat (full_strip_suffix, strip_suffix); + + full_gstrip_suffix + = xcalloc (strlen (gstrip_suffix) + strlen (target_machine) + 2, 1); + strcpy (full_gstrip_suffix, target_machine); + strcat (full_gstrip_suffix, "-"); + strcat (full_gstrip_suffix, gstrip_suffix); +#endif /* CROSS_COMPILE */ + + /* Try to discover a valid linker/nm/strip to use. */ + + /* Maybe we know the right file to use (if not cross). */ +#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); + + /* If we've invoked ourselves, try again with LD_FILE_NAME. */ + + if (collect_names != 0) + { + if (ld_file_name != 0) + { + argv[0] = ld_file_name; + execvp (argv[0], argv); + } + fatal ("cannot find `ld'"); + } + +#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 = xcalloc (sizeof ("gcc-") + strlen (target_machine) + 1, 1); + strcpy (c_file_name, target_machine); + strcat (c_file_name, "-gcc"); +#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. */ + choose_temp_base (); + c_file = xcalloc (temp_filename_length + sizeof (".c"), 1); + o_file = xcalloc (temp_filename_length + sizeof (".o"), 1); + export_file = xmalloc (temp_filename_length + sizeof (".x")); + ldout = xmalloc (temp_filename_length + sizeof (".ld")); + sprintf (ldout, "%s.ld", temp_filename); + sprintf (c_file, "%s.c", temp_filename); + sprintf (o_file, "%s.o", temp_filename); + sprintf (export_file, "%s.x", temp_filename); + *c_ptr++ = c_file_name; + *c_ptr++ = "-c"; + *c_ptr++ = "-o"; + *c_ptr++ = o_file; + + /* !!! 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]) + { + case 'd': + if (!strcmp (arg, "-debug")) + { + debug = 1; + vflag = 1; + ld1--; + ld2--; + } + break; + +#ifdef COLLECT_EXPORT_LIST + case 'b': + if ((!strncmp (arg, "-bE:", 4) + || !strncmp (arg, "-bexport:", 9)) + && strcmp (arg, "-bexport:/usr/lib/libg.exp")) + auto_export = 0; + break; +#endif + + case 'l': + if (first_file) + { + /* place o_file BEFORE this argument! */ + first_file = 0; + ld2--; + *ld2++ = o_file; + *ld2++ = arg; + } + break; + + case 'o': + if (arg[2] == '\0') + output_file = *ld1++ = *ld2++ = *++argv; + else + 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 + won't 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 = rindex (arg, '.')) != (char *)0 + && (strcmp (p, ".o") == 0 || strcmp (p, ".a") == 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') + *object++ = arg; + } + } + + /* Get any options that the upper GCC wants to pass to the sub-GCC. */ + p = (char *) getenv ("COLLECT_GCC_OPTIONS"); + if (p) + while (*p) + { + char *q = p; + while (*q && *q != ' ') q++; + if (*p == '-' && (p[1] == 'm' || p[1] == 'f')) + *c_ptr++ = savestring (p, q - p); + if (strncmp (p, "-shared", sizeof ("shared") - 1) == 0) + shared_obj = 1; + + if (*q) q++; + p = q; + } + +#ifdef COLLECT_EXPORT_LIST + /* The AIX linker will discard static constructors in object files if + nothing else in the file is referenced, so look at them first. */ + while (object_lst < object) + scan_prog_file (*object_lst++, PASS_OBJ); + + { + char *buf = alloca (strlen (export_file) + 5); + sprintf (buf, "-bE:%s", export_file); + *ld1++ = buf; + *ld2++ = buf; + exportf = fopen (export_file, "w"); + if (exportf == (FILE *)0) + fatal_perror ("%s", export_file); + write_export_file (exportf); + if (fclose (exportf)) + fatal_perror ("closing %s", export_file); + } +#endif + + *c_ptr++ = c_file; + *object = *c_ptr = *ld1 = (char *)0; + + if (vflag) + { + fprintf (stderr, "collect2 version %s", version_string); +#ifdef TARGET_VERSION + TARGET_VERSION; +#endif + fprintf (stderr, "\n"); + } + + if (debug) + { + 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_NAMES"); + if (ptr) + fprintf (stderr, "COLLECT_NAMES = %s\n", ptr); + + 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"); + if (ptr) + fprintf (stderr, "LIBRARY_PATH = %s\n", ptr); + + fprintf (stderr, "\n"); + } + + /* Load the program, searching all libraries. */ + + collect_execute ("ld", ld1_argv, ldout); + do_wait ("ld"); + dump_file (ldout); + unlink (ldout); + + /* If -r or they'll be run via some other method, don't build the + constructor or destructor list, just return now. */ + if (rflag || ! do_collecting) + 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. */ + + scan_prog_file (output_file, PASS_FIRST); + +#ifdef SCAN_LIBRARIES + scan_libraries (output_file); +#endif + + if (debug) + { + fprintf (stderr, "%d constructor(s) found\n", constructors.number); + fprintf (stderr, "%d destructor(s) found\n", destructors.number); + } + + if (constructors.number == 0 && destructors.number == 0 +#ifdef LDD_SUFFIX + /* If we will be running these functions ourselves, we want to emit + stubs into the shared library so that we don't have to relink + dependent programs when we add static objects. */ + && ! shared_obj +#endif + ) + { + /* Strip now if it was requested on the command line. */ + if (strip_flag) + { + char **strip_argv = (char **) xcalloc (sizeof (char *), 3); + strip_argv[0] = strip_file_name; + strip_argv[1] = output_file; + strip_argv[2] = (char *) 0; + fork_execute ("strip", strip_argv); + } + +#ifdef COLLECT_EXPORT_LIST + maybe_unlink (export_file); +#endif + return 0; + } + + maybe_unlink(output_file); + outf = fopen (c_file, "w"); + if (outf == (FILE *)0) + fatal_perror ("%s", c_file); + + write_c_file (outf, c_file); + + if (fclose (outf)) + fatal_perror ("closing %s", c_file); + + /* Tell the linker that we have initializer and finalizer functions. */ +#ifdef LD_INIT_SWITCH + *ld2++ = LD_INIT_SWITCH; + *ld2++ = initname; + *ld2++ = LD_FINI_SWITCH; + *ld2++ = fininame; +#endif + *ld2 = (char*)0; + +#ifdef COLLECT_EXPORT_LIST + if (shared_obj) + { + 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 ("%s", export_file); + write_export_file (exportf); + if (fclose (exportf)) + fatal_perror ("closing %s", export_file); + } +#endif + + 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_export_file (stderr); + 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); + 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); + + maybe_unlink (c_file); + maybe_unlink (o_file); + maybe_unlink (export_file); + return 0; +} + + +/* Wait for a process to finish, and exit if a non-zero status is found. */ + +int +collect_wait (prog) + char *prog; +{ + int status; + + wait (&status); + if (status) + { + if (WIFSIGNALED (status)) + { + int sig = WTERMSIG (status); +#ifdef NO_SYS_SIGLIST + error ("%s terminated with signal %d %s", + prog, + sig, + (status & 0200) ? ", core dumped" : ""); +#else + error ("%s terminated with signal %d [%s]%s", + prog, + sig, + sys_siglist[sig], + (status & 0200) ? ", core dumped" : ""); +#endif + + collect_exit (127); + } + + if (WIFEXITED (status)) + return WEXITSTATUS (status); + } + return 0; +} + +static void +do_wait (prog) + char *prog; +{ + int ret = collect_wait (prog); + if (ret != 0) + { + error ("%s returned %d exit status", prog, ret); + collect_exit (ret); + } +} + + +/* Fork and execute a program, and wait for the reply. */ + +void +collect_execute (prog, argv, redir) + char *prog; + char **argv; + char *redir; +{ + int pid; + + if (vflag || debug) + { + char **p_argv; + char *str; + + if (argv[0]) + fprintf (stderr, "%s", argv[0]); + else + fprintf (stderr, "[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 can't find a program we need, complain error. Do this here + since we might not end up needing something that we couldn't find. */ + + if (argv[0] == 0) + fatal ("cannot find `%s'", prog); + + pid = vfork (); + if (pid == -1) + { +#ifdef vfork + fatal_perror ("fork"); +#else + fatal_perror ("vfork"); +#endif + } + + if (pid == 0) /* child context */ + { + if (redir) + { + unlink (redir); + if (freopen (redir, "a", stdout) == NULL) + fatal_perror ("redirecting stdout"); + if (freopen (redir, "a", stderr) == NULL) + fatal_perror ("redirecting stderr"); + } + + execvp (argv[0], argv); + fatal_perror ("executing %s", prog); + } +} + +static void +fork_execute (prog, argv) + char *prog; + char **argv; +{ + collect_execute (prog, argv, NULL); + do_wait (prog); +} + +/* Unlink a file unless we are debugging. */ + +static void +maybe_unlink (file) + char *file; +{ + if (!debug) + unlink (file); + else + fprintf (stderr, "[Leaving %s]\n", file); +} + + +/* Add a name to a linked list. */ + +static void +add_to_list (head_ptr, name) + struct head *head_ptr; + char *name; +{ + struct id *newid + = (struct id *) xcalloc (sizeof (struct id) + strlen (name), 1); + struct id *p; + static long sequence_number = 0; + 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++; +} + +/* Write: `prefix', the names on list LIST, `suffix'. */ + +static void +write_list (stream, prefix, list) + FILE *stream; + char *prefix; + struct id *list; +{ + while (list) + { + fprintf (stream, "%sx%d,\n", prefix, list->sequence); + list = list->next; + } +} + +static void +write_list_with_asm (stream, prefix, list) + FILE *stream; + 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; + char *name; +{ + char *prefix, *p, *q; + + /* Figure out name of output_file, stripping off .so version. */ + p = rindex (output_file, '/'); + if (p == 0) + p = (char *) output_file; + else + p++; + q = p; + while (q) + { + q = index (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 (q = prefix; *q; q++) + if (!isalnum (*q)) + *q = '_'; + if (debug) + fprintf (stderr, "\nwrite_c_file - output name is %s, prefix is %s\n", + output_file, prefix); + +#define INIT_NAME_FORMAT "_GLOBAL__FI_%s" + initname = xmalloc (strlen (prefix) + sizeof (INIT_NAME_FORMAT) - 2); + sprintf (initname, INIT_NAME_FORMAT, prefix); + +#define FINI_NAME_FORMAT "_GLOBAL__FD_%s" + fininame = xmalloc (strlen (prefix) + sizeof (FINI_NAME_FORMAT) - 2); + sprintf (fininame, FINI_NAME_FORMAT, prefix); + + 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); + fprintf (stream, "void %s() {\n", initname); + if (constructors.number > 0) + { + fprintf (stream, "\tstatic entry_pt *ctors[] = {\n"); + write_list (stream, "\t\t", constructors.first); + 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); + 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) + { + fprintf (stream, "\tstatic entry_pt *dtors[] = {\n"); + write_list (stream, "\t\t", destructors.first); + 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); + } + fprintf (stream, "}\n"); + + if (shared_obj) + { + fprintf (stream, "void _GLOBAL__DI() {\n\t%s();\n}\n", initname); + fprintf (stream, "void _GLOBAL__DD() {\n\t%s();\n}\n", fininame); + } +} + +/* Write the constructor/destructor tables. */ + +static void +write_c_file_glob (stream, name) + FILE *stream; + char *name; +{ + /* Write the tables as C code */ + + fprintf (stream, "typedef void entry_pt();\n\n"); + + write_list_with_asm (stream, "extern entry_pt ", constructors.first); + + fprintf (stream, "\nentry_pt * __CTOR_LIST__[] = {\n"); + fprintf (stream, "\t(entry_pt *) %d,\n", constructors.number); + write_list (stream, "\t", constructors.first); + 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); + write_list (stream, "\t", destructors.first); + 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); +} + +static void +write_c_file (stream, name) + FILE *stream; + char *name; +{ +#ifndef LD_INIT_SWITCH + if (! shared_obj) + write_c_file_glob (stream, name); + else +#endif + write_c_file_stat (stream, name); +} + +static void +write_export_file (stream) + FILE *stream; +{ + struct id *list = exports.first; + for (; list; list = list->next) + fprintf (stream, "%s\n", list->name); +} + +#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) + char *prog_name; + enum pass which_pass; +{ + void (*int_handler) (); + void (*quit_handler) (); + char *nm_argv[4]; + int pid; + int argc = 0; + int pipe_fd[2]; + char *p, buf[1024]; + FILE *inf; + + if (which_pass == PASS_SECOND) + return; + + /* If we don't 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) + { + char **p_argv; + 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) + { +#ifdef vfork + fatal_perror ("fork"); +#else + fatal_perror ("vfork"); +#endif + } + + 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, nm_argv); + fatal_perror ("executing %s", nm_file_name); + } + + /* Parent context from here on. */ + int_handler = (void (*) ())signal (SIGINT, SIG_IGN); +#ifdef SIGQUIT + quit_handler = (void (*) ())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. + Don't 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; + + 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 of pipe"); + + 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 +#include +#include +#include +#include +#include +#include + +/* 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 (name) + 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 == -1) + fatal ("unable to mmap file '%s'", name); + + close (fp); +} + +/* Helpers for locatelib. */ + +static char *libname; + +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 won't be used. */ + +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 a 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 a 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 (name) + char *name; +{ + static char **l; + static int cnt; + char buf[MAXPATHLEN]; + char *p, *q; + 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 = (char *) malloc (strlen (ld_rules) + 1); + strcpy (ldr, ld_rules); + } + p = getenv ("LD_LIBRARY_PATH"); + q = 0; + if (p) + { + cnt++; + for (q = p ; *q != 0; q++) + if (*q == ':') + cnt++; + q = (char *) malloc (strlen (p) + 1); + strcpy (q, p); + } + l = (char **) malloc ((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) + fprintf (stderr, "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) + 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) + fprintf (stderr, "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) + char *prog_name; +{ + static struct head libraries; /* list of shared libraries found */ + struct id *list; + void (*int_handler) (); + void (*quit_handler) (); + char *ldd_argv[4]; + int pid; + int argc = 0; + int pipe_fd[2]; + char buf[1024]; + FILE *inf; + + /* If we don't 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) + { + char **p_argv; + 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) + { +#ifdef vfork + fatal_perror ("fork"); +#else + fatal_perror ("vfork"); +#endif + } + + 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, ldd_argv); + fatal_perror ("executing %s", ldd_file_name); + } + + /* Parent context from here on. */ + int_handler = (void (*) ()) signal (SIGINT, SIG_IGN); +#ifdef SIGQUIT + quit_handler = (void (*) ()) signal (SIGQUIT, SIG_IGN); +#endif + + if (close (pipe_fd[1]) < 0) + fatal_perror ("close (%d)", pipe_fd[1]); + + if (debug) + fprintf (stderr, "\nldd output with constructors/destructors.\n"); + + /* Read each line of ldd output. */ + while (fgets (buf, sizeof buf, inf) != (char *) 0) + { + int ch, 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 of pipe"); + + 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).sc == scText) +# 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 +# define GCC_OK_SYMBOL(X) \ + (((X).n_sclass == C_EXT) && \ + (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) || \ + ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))) +# define GCC_SYMINC(X) ((X).n_numaux+1) +# define GCC_SYMZERO(X) 0 +# define GCC_CHECK_HDR(X) (1) +#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) + char *prog_name; + enum pass which_pass; +{ + LDFILE *ldptr = NULL; + int sym_index, sym_count; + + if (which_pass != PASS_FIRST && which_pass != PASS_OBJ) + return; + + if ((ldptr = ldopen (prog_name, ldptr)) == NULL) + fatal ("%s: can't open as COFF file", prog_name); + + 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); + 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: + add_to_list (&constructors, name); + if (which_pass == PASS_OBJ) + add_to_list (&exports, name); + break; + + case 2: + add_to_list (&destructors, name); + if (which_pass == PASS_OBJ) + add_to_list (&exports, name); + break; + + default: /* not a constructor or destructor */ + if (which_pass == PASS_OBJ && auto_export) + add_to_list (&exports, name); + continue; + } + +#if !defined(EXTENDED_COFF) + if (debug) + 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 + if (debug) + fprintf (stderr, "\tiss = %5d, value = %5d, index = %5d, name = %s\n", + symbol.iss, symbol.value, symbol.index, name); +#endif + } + } + } + + (void) ldclose(ldptr); +} + +#ifdef XCOFF_SCAN_LIBS +/* Scan imported AIX libraries for GCC static ctors and dtors. + FIXME: it is possible to link an executable without the actual import + library by using an "import file" - a text file listing symbols + exported by a library. To support this, we would have to scan + import files as well as actual shared binaries to find GCC ctors. + TODO: use memory mapping instead of 'ld' routines, files are already + memory mapped, but we could eliminate the extra in-memory copies. + Is it worth the effort? */ + +static void +scan_libraries (prog_name) + char *prog_name; +{ + LDFILE *ldptr; + SCNHDR ldsh; + static struct path_prefix libpath; /* we should only do this once */ + + if ((ldptr = ldopen (prog_name, ldptr)) == NULL) + fatal ("%s: can't open as COFF file", prog_name); + + if (!MY_ISCOFF (HEADER (ldptr).f_magic)) + fatal ("%s: not a COFF file", prog_name); + + /* find and read loader section */ + if (ldnshread (ldptr, _LOADER, &ldsh)) + { + LDHDR ldh; + char *impbuf; + int idx; + FSEEK (ldptr, ldsh.s_scnptr, BEGINNING); + FREAD (&ldh, sizeof ldh, 1, ldptr); + /* read import library list */ + impbuf = alloca (ldh.l_istlen); + FSEEK (ldptr, ldh.l_impoff + ldsh.s_scnptr, BEGINNING); + FREAD (impbuf, ldh.l_istlen, 1, ldptr); + idx = strlen (impbuf) + 1; + idx += strlen (impbuf+idx) + 1; + if (debug) + fprintf (stderr, "LIBPATH=%s\n", impbuf); + prefix_from_string (impbuf, &libpath); + while (idx < ldh.l_istlen) + { + char *implib = impbuf + idx; + char *impmem = implib + strlen (implib) + 1; + char *soname = 0; + LDFILE *libptr = NULL; + struct prefix_list *pl; + ARCHDR ah; + idx += strlen (implib) + 1; + if (!implib[0]) + continue; + idx += strlen (impmem) + 1; + if (*implib == '/') + { + if (access (soname, R_OK) == 0) + soname = implib; + } + else + { + char *temp = alloca (libpath.max_len + strlen (implib) + 1); + for (pl = libpath.plist; pl; pl = pl->next) + { + strcpy (temp, pl->prefix); + strcat (temp, implib); + if (access (temp, R_OK) == 0) + { + soname = temp; + break; + } + } + } + if (!soname) + { + fatal ("%s: library not found", implib); + continue; + } + if (debug) + { + if (impmem[0]) + fprintf (stderr, "%s (%s)\n", soname, impmem); + else + fprintf (stderr, "%s\n", soname); + } + ah.ar_name[0] = 0; + do + { + /* scan imported shared objects for GCC GLOBAL ctors */ + short type; + if ((libptr = ldopen (soname, libptr)) == NULL) + fatal ("%s: can't open import library", soname); + if (TYPE (libptr) == ARTYPE) + { + LDFILE *memptr; + if (!impmem[0]) + fatal ("%s: no archive member specified", soname); + ldahread (libptr, &ah); + if (strcmp (ah.ar_name, impmem)) + continue; + } + type = HEADER (libptr).f_magic; + if (HEADER (libptr).f_flags & F_SHROBJ) + { + SCNHDR soldsh; + LDHDR soldh; + long symcnt, i; + char *ldstrings; + LDSYM *lsyms; + if (!ldnshread (libptr, _LOADER, &soldsh)) + fatal ("%s: not an import library", soname); + FSEEK (libptr, soldsh.s_scnptr, BEGINNING); + if (FREAD (&soldh, sizeof soldh, 1, libptr) != 1) + fatal ("%s: can't read loader section", soname); + /*fprintf (stderr, "\tscanning %s\n", soname);*/ + symcnt = soldh.l_nsyms; + lsyms = (LDSYM*) alloca (symcnt * sizeof *lsyms); + symcnt = FREAD (lsyms, sizeof *lsyms, symcnt, libptr); + ldstrings = alloca (soldh.l_stlen); + FSEEK (libptr, soldsh.s_scnptr+soldh.l_stoff, BEGINNING); + FREAD (ldstrings, soldh.l_stlen, 1, libptr); + for (i = 0; i < symcnt; ++i) + { + LDSYM *l = lsyms + i; + if (LDR_EXPORT (*l)) + { + char *expname = 0; + if (l->l_zeroes) + expname = l->l_name; + else if (l->l_offset < soldh.l_stlen) + expname = ldstrings + l->l_offset; + switch (is_ctor_dtor (expname)) + { + case 3: + if (debug) + fprintf (stderr, "\t%s\n", expname); + add_to_list (&constructors, expname); + break; + + case 4: + add_to_list (&destructors, expname); + break; + + default: /* not a constructor or destructor */ + continue; + } + } + } + } + else + fprintf (stderr, "%s: type = %04X flags = %04X\n", + ah.ar_name, type, HEADER (libptr).f_flags); + } + while (ldclose (libptr) == FAILURE); + /* printf (stderr, "closed %s\n", soname); */ + } + } +} +#endif /* XCOFF_SCAN_LIBS */ + +#endif /* OBJECT_FORMAT_COFF */ + + +/* + * 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 PROTO((mo_header_t *, load_all_t *, + symbol_info_t *, int)); +static void print_header PROTO((mo_header_t *)); +static void print_load_command PROTO((load_union_t*, size_t, int)); +static void bad_header PROTO((int)); +static struct file_info *read_file PROTO((char *, int, int)); +static void end_file PROTO((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) + 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 ("can't read %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); + bcopy ((char *)load_hdr, (char *)ptr, 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 the load command map and is not undefined, + decrement the count of load commands. */ + if (rw && load_end[-1].load->hdr.ldci_cmd_type == LDC_UNDEFINED) + { + load_end--; + hdr.moh_n_load_cmds--; + } + + /* Go through and process each symbol table section. */ + symbol_load_cmds = 0; + for (load_cmd = load_array; load_cmd < load_end; load_cmd++) + { + load_union_t *load_hdr = load_cmd->load; + + if (load_hdr->hdr.ldci_cmd_type == LDC_SYMBOLS) + { + symbol_load_cmds++; + + if (debug) + { + char *kind = "unknown"; + + switch (load_hdr->sym.symc_kind) + { + case SYMC_IMPORTS: kind = "imports"; break; + case SYMC_DEFINED_SYMBOLS: kind = "defined"; break; + case SYMC_STABS: kind = "stabs"; break; + } + + fprintf (stderr, "\nProcessing symbol table #%d, offset = 0x%.8lx, kind = %s\n", + symbol_load_cmds, load_hdr->hdr.ldci_section_off, kind); + } + + if (load_hdr->sym.symc_kind != SYMC_DEFINED_SYMBOLS) + continue; + + str_sect = load_array[load_hdr->sym.symc_strings_section].section; + if (str_sect == (char *)0) + fatal ("string section missing"); + + if (load_cmd->section == (char *)0) + fatal ("section pointer missing"); + + num_syms = load_hdr->sym.symc_nentries; + for (i = 0; i < num_syms; i++) + { + symbol_info_t *sym = ((symbol_info_t *) load_cmd->section) + i; + char *name = sym->si_name.symbol_name + str_sect; + + if (name[0] != '_') + continue; + + if (rw) + { + char *n = name + strlen (name) - strlen (NAME__MAIN); + + if ((n - name) < 0 || strcmp (n, NAME__MAIN)) + continue; + while (n != name) + if (*--n != '_') + continue; + + main_sym = sym; + } + else + { + switch (is_ctor_dtor (name)) + { + case 1: + add_to_list (&constructors, name); + break; + + case 2: + add_to_list (&destructors, name); + break; + + default: /* not a constructor or destructor */ + continue; + } + } + + if (debug) + fprintf (stderr, "\ttype = 0x%.4x, sc = 0x%.2x, flags = 0x%.8x, name = %.30s\n", + sym->si_type, sym->si_sc_type, sym->si_flags, name); + } + } + } + + if (symbol_load_cmds == 0) + fatal ("no symbol table found"); + + /* Update the program file now, rewrite header and load commands. At present, + we assume that there is enough space after the last load command to insert + one more. Since the first section written out is page aligned, and the + number of load commands is small, this is ok for the present. */ + + if (rw) + { + load_union_t *load_map; + size_t size; + + if (cmd_strings == -1) + fatal ("no cmd_strings found"); + + /* Add __main to initializer list. + If we are building a program instead of a shared library, don't + do anything, since in the current version, you cannot do mallocs + and such in the constructors. */ + + if (main_sym != (symbol_info_t *)0 + && ((hdr.moh_flags & MOH_EXECABLE_F) == 0)) + add_func_table (&hdr, load_array, main_sym, FNTC_INITIALIZATION); + + if (debug) + fprintf (stderr, "\nUpdating header and load commands.\n\n"); + + hdr.moh_n_load_cmds++; + size = sizeof (load_cmd_map_command_t) + (sizeof (mo_offset_t) * (hdr.moh_n_load_cmds - 1)); + + /* Create new load command map. */ + if (debug) + fprintf (stderr, "load command map, %d cmds, new size %ld.\n", + (int)hdr.moh_n_load_cmds, (long)size); + + load_map = (load_union_t *) xcalloc (1, size); + load_map->map.ldc_header.ldci_cmd_type = LDC_CMD_MAP; + load_map->map.ldc_header.ldci_cmd_size = size; + load_map->map.lcm_ld_cmd_strings = cmd_strings; + load_map->map.lcm_nentries = hdr.moh_n_load_cmds; + load_array[hdr.moh_n_load_cmds-1].load = load_map; + + offset = hdr.moh_first_cmd_off; + for (i = 0; i < hdr.moh_n_load_cmds; i++) + { + load_map->map.lcm_map[i] = offset; + if (load_array[i].load->hdr.ldci_cmd_type == LDC_CMD_MAP) + hdr.moh_load_map_cmd_off = offset; + + offset += load_array[i].load->hdr.ldci_cmd_size; + } + + hdr.moh_sizeofcmds = offset - MO_SIZEOF_RAW_HDR; + + if (debug) + print_header (&hdr); + + /* Write header */ + status = encode_mach_o_hdr (&hdr, obj, MO_SIZEOF_RAW_HDR); + if (status != MO_HDR_CONV_SUCCESS) + bad_header (status); + + if (debug) + fprintf (stderr, "writing load commands.\n\n"); + + /* Write load commands */ + offset = hdr.moh_first_cmd_off; + for (i = 0; i < hdr.moh_n_load_cmds; i++) + { + load_union_t *load_hdr = load_array[i].load; + size_t size = load_hdr->hdr.ldci_cmd_size; + + if (debug) + print_load_command (load_hdr, offset, i); + + bcopy ((char *)load_hdr, (char *)(obj + offset), size); + offset += size; + } + } + + end_file (obj_file); + + if (close (prog_fd)) + fatal_perror ("closing %s", prog_name); + + if (debug) + fprintf (stderr, "\n"); +} + + +/* Add a function table to the load commands to call a function + on initiation or termination of the process. */ + +static void +add_func_table (hdr_p, load_array, sym, type) + mo_header_t *hdr_p; /* pointer to global header */ + load_all_t *load_array; /* array of ptrs to load cmds */ + symbol_info_t *sym; /* pointer to symbol entry */ + int type; /* fntc_type value */ +{ + /* Add a new load command. */ + int num_cmds = ++hdr_p->moh_n_load_cmds; + int load_index = num_cmds - 1; + size_t size = sizeof (func_table_command_t) + sizeof (mo_addr_t); + load_union_t *ptr = xcalloc (1, size); + load_all_t *load_cmd; + int i; + + /* Set the unresolved address bit in the header to force the loader to be + used, since kernel exec does not call the initialization functions. */ + hdr_p->moh_flags |= MOH_UNRESOLVED_F; + + load_cmd = &load_array[load_index]; + load_cmd->load = ptr; + load_cmd->section = (char *)0; + + /* Fill in func table load command. */ + ptr->func.ldc_header.ldci_cmd_type = LDC_FUNC_TABLE; + ptr->func.ldc_header.ldci_cmd_size = size; + ptr->func.ldc_header.ldci_section_off = 0; + ptr->func.ldc_header.ldci_section_len = 0; + ptr->func.fntc_type = type; + ptr->func.fntc_nentries = 1; + + /* copy address, turn it from abs. address to (region,offset) if necessary. */ + /* Is the symbol already expressed as (region, offset)? */ + if ((sym->si_flags & SI_ABSOLUTE_VALUE_F) == 0) + { + ptr->func.fntc_entry_loc[i].adr_lcid = sym->si_value.def_val.adr_lcid; + ptr->func.fntc_entry_loc[i].adr_sctoff = sym->si_value.def_val.adr_sctoff; + } + + /* If not, figure out which region it's in. */ + else + { + mo_vm_addr_t addr = sym->si_value.abs_val; + int found = 0; + + for (i = 0; i < load_index; i++) + { + if (load_array[i].load->hdr.ldci_cmd_type == LDC_REGION) + { + region_command_t *region_ptr = &load_array[i].load->region; + + if ((region_ptr->regc_flags & REG_ABS_ADDR_F) != 0 + && addr >= region_ptr->regc_addr.vm_addr + && addr <= region_ptr->regc_addr.vm_addr + region_ptr->regc_vm_size) + { + ptr->func.fntc_entry_loc[0].adr_lcid = i; + ptr->func.fntc_entry_loc[0].adr_sctoff = addr - region_ptr->regc_addr.vm_addr; + found++; + break; + } + } + } + + if (!found) + fatal ("could not convert 0x%l.8x into a region", addr); + } + + if (debug) + fprintf (stderr, + "%s function, region %d, offset = %ld (0x%.8lx)\n", + (type == FNTC_INITIALIZATION) ? "init" : "term", + (int)ptr->func.fntc_entry_loc[i].adr_lcid, + (long)ptr->func.fntc_entry_loc[i].adr_sctoff, + (long)ptr->func.fntc_entry_loc[i].adr_sctoff); + +} + + +/* Print the global header for an OSF/rose object. */ + +static void +print_header (hdr_ptr) + mo_header_t *hdr_ptr; +{ + fprintf (stderr, "\nglobal header:\n"); + fprintf (stderr, "\tmoh_magic = 0x%.8lx\n", hdr_ptr->moh_magic); + fprintf (stderr, "\tmoh_major_version = %d\n", (int)hdr_ptr->moh_major_version); + fprintf (stderr, "\tmoh_minor_version = %d\n", (int)hdr_ptr->moh_minor_version); + fprintf (stderr, "\tmoh_header_version = %d\n", (int)hdr_ptr->moh_header_version); + fprintf (stderr, "\tmoh_max_page_size = %d\n", (int)hdr_ptr->moh_max_page_size); + fprintf (stderr, "\tmoh_byte_order = %d\n", (int)hdr_ptr->moh_byte_order); + fprintf (stderr, "\tmoh_data_rep_id = %d\n", (int)hdr_ptr->moh_data_rep_id); + fprintf (stderr, "\tmoh_cpu_type = %d\n", (int)hdr_ptr->moh_cpu_type); + fprintf (stderr, "\tmoh_cpu_subtype = %d\n", (int)hdr_ptr->moh_cpu_subtype); + fprintf (stderr, "\tmoh_vendor_type = %d\n", (int)hdr_ptr->moh_vendor_type); + fprintf (stderr, "\tmoh_load_map_cmd_off = %d\n", (int)hdr_ptr->moh_load_map_cmd_off); + fprintf (stderr, "\tmoh_first_cmd_off = %d\n", (int)hdr_ptr->moh_first_cmd_off); + fprintf (stderr, "\tmoh_sizeofcmds = %d\n", (int)hdr_ptr->moh_sizeofcmds); + fprintf (stderr, "\tmon_n_load_cmds = %d\n", (int)hdr_ptr->moh_n_load_cmds); + fprintf (stderr, "\tmoh_flags = 0x%.8lx", (long)hdr_ptr->moh_flags); + + if (hdr_ptr->moh_flags & MOH_RELOCATABLE_F) + fprintf (stderr, ", relocatable"); + + if (hdr_ptr->moh_flags & MOH_LINKABLE_F) + fprintf (stderr, ", linkable"); + + if (hdr_ptr->moh_flags & MOH_EXECABLE_F) + fprintf (stderr, ", execable"); + + if (hdr_ptr->moh_flags & MOH_EXECUTABLE_F) + fprintf (stderr, ", executable"); + + if (hdr_ptr->moh_flags & MOH_UNRESOLVED_F) + fprintf (stderr, ", unresolved"); + + fprintf (stderr, "\n\n"); + return; +} + + +/* Print a short summary of a load command. */ + +static void +print_load_command (load_hdr, offset, number) + load_union_t *load_hdr; + size_t offset; + int number; +{ + mo_long_t type = load_hdr->hdr.ldci_cmd_type; + char *type_str = (char *)0; + + switch (type) + { + case LDC_UNDEFINED: type_str = "UNDEFINED"; break; + case LDC_CMD_MAP: type_str = "CMD_MAP"; break; + case LDC_INTERPRETER: type_str = "INTERPRETER"; break; + case LDC_STRINGS: type_str = "STRINGS"; break; + case LDC_REGION: type_str = "REGION"; break; + case LDC_RELOC: type_str = "RELOC"; break; + case LDC_PACKAGE: type_str = "PACKAGE"; break; + case LDC_SYMBOLS: type_str = "SYMBOLS"; break; + case LDC_ENTRY: type_str = "ENTRY"; break; + case LDC_FUNC_TABLE: type_str = "FUNC_TABLE"; break; + case LDC_GEN_INFO: type_str = "GEN_INFO"; break; + } + + fprintf (stderr, + "cmd %2d, sz: 0x%.2lx, coff: 0x%.3lx, doff: 0x%.6lx, dlen: 0x%.6lx", + number, + (long) load_hdr->hdr.ldci_cmd_size, + (long) offset, + (long) load_hdr->hdr.ldci_section_off, + (long) load_hdr->hdr.ldci_section_len); + + if (type_str == (char *)0) + fprintf (stderr, ", ty: unknown (%ld)\n", (long) type); + + else if (type != LDC_REGION) + fprintf (stderr, ", ty: %s\n", type_str); + + else + { + char *region = ""; + switch (load_hdr->region.regc_usage_type) + { + case REG_TEXT_T: region = ", .text"; break; + case REG_DATA_T: region = ", .data"; break; + case REG_BSS_T: region = ", .bss"; break; + case REG_GLUE_T: region = ", .glue"; break; +#if defined (REG_RDATA_T) && defined (REG_SDATA_T) && defined (REG_SBSS_T) /*mips*/ + case REG_RDATA_T: region = ", .rdata"; break; + case REG_SDATA_T: region = ", .sdata"; break; + case REG_SBSS_T: region = ", .sbss"; break; +#endif + } + + fprintf (stderr, ", ty: %s, vaddr: 0x%.8lx, vlen: 0x%.6lx%s\n", + type_str, + (long) load_hdr->region.regc_vm_addr, + (long) load_hdr->region.regc_vm_size, + region); + } + + return; +} + + +/* Fatal error when {en,de}code_mach_o_header fails. */ + +static void +bad_header (status) + int status; +{ + char *msg = (char *)0; + + switch (status) + { + case MO_ERROR_BAD_MAGIC: msg = "bad magic number"; break; + case MO_ERROR_BAD_HDR_VERS: msg = "bad header version"; break; + case MO_ERROR_BAD_RAW_HDR_VERS: msg = "bad raw header version"; break; + case MO_ERROR_BUF2SML: msg = "raw header buffer too small"; break; + case MO_ERROR_OLD_RAW_HDR_FILE: msg = "old raw header file"; break; + case MO_ERROR_UNSUPPORTED_VERS: msg = "unsupported version"; break; + } + + if (msg == (char *)0) + fatal ("unknown {de,en}code_mach_o_hdr return value %d", status); + else + fatal ("%s", msg); +} + + +/* Read a file into a memory buffer. */ + +static struct file_info * +read_file (name, fd, rw) + char *name; /* filename */ + int fd; /* file descriptor */ + int rw; /* read/write */ +{ + struct stat stat_pkt; + struct file_info *p = (struct file_info *) xcalloc (sizeof (struct file_info), 1); +#ifdef USE_MMAP + static int page_size; +#endif + + if (fstat (fd, &stat_pkt) < 0) + fatal_perror ("fstat %s", name); + + p->name = name; + p->size = stat_pkt.st_size; + p->rounded_size = stat_pkt.st_size; + p->fd = fd; + p->rw = rw; + +#ifdef USE_MMAP + if (debug) + fprintf (stderr, "mmap %s, %s\n", name, (rw) ? "read/write" : "read-only"); + + if (page_size == 0) + page_size = sysconf (_SC_PAGE_SIZE); + + p->rounded_size = ((p->size + page_size - 1) / page_size) * page_size; + p->start = mmap ((caddr_t)0, + (rw) ? p->rounded_size : p->size, + (rw) ? (PROT_READ | PROT_WRITE) : PROT_READ, + MAP_FILE | MAP_VARIABLE | MAP_SHARED, + fd, + 0L); + + if (p->start != (char *)0 && p->start != (char *)-1) + p->use_mmap = 1; + + else +#endif /* USE_MMAP */ + { + long len; + + if (debug) + fprintf (stderr, "read %s\n", name); + + p->use_mmap = 0; + p->start = xmalloc (p->size); + if (lseek (fd, 0L, SEEK_SET) < 0) + fatal_perror ("lseek to 0 on %s", name); + + len = read (fd, p->start, p->size); + if (len < 0) + fatal_perror ("read %s", name); + + if (len != p->size) + fatal ("read %ld bytes, expected %ld, from %s", len, p->size, name); + } + + return p; +} + +/* Do anything necessary to write a file back from memory. */ + +static void +end_file (ptr) + struct file_info *ptr; /* file information block */ +{ +#ifdef USE_MMAP + if (ptr->use_mmap) + { + if (ptr->rw) + { + if (debug) + fprintf (stderr, "msync %s\n", ptr->name); + + if (msync (ptr->start, ptr->rounded_size, MS_ASYNC)) + fatal_perror ("msync %s", ptr->name); + } + + if (debug) + fprintf (stderr, "munmap %s\n", ptr->name); + + if (munmap (ptr->start, ptr->size)) + fatal_perror ("munmap %s", ptr->name); + } + else +#endif /* USE_MMAP */ + { + if (ptr->rw) + { + long len; + + if (debug) + fprintf (stderr, "write %s\n", ptr->name); + + if (lseek (ptr->fd, 0L, SEEK_SET) < 0) + fatal_perror ("lseek to 0 on %s", ptr->name); + + len = write (ptr->fd, ptr->start, ptr->size); + if (len < 0) + fatal_perror ("write %s", ptr->name); + + if (len != ptr->size) + fatal ("wrote %ld bytes, expected %ld, to %s", len, ptr->size, ptr->name); + } + + free (ptr->start); + } + + free (ptr); +} + +#endif /* OBJECT_FORMAT_ROSE */ -- cgit v1.2.3