Import Upstream version 4e6upstream/4e6

1 files changed, 448 insertions, 0 deletions

diff --git a/dynl.c b/dynl.c
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+/* Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * As a special exception, the Free Software Foundation gives permission
+ * for additional uses of the text contained in its release of GUILE.
+ *
+ * The exception is that, if you link the GUILE library with other files
+ * to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the GUILE library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the
+ * Free Software Foundation under the name GUILE.  If you copy
+ * code from other Free Software Foundation releases into a copy of
+ * GUILE, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way.  To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for GUILE, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice.  
+ */
+
+/* "dynl.c" dynamically link&load object files.
+   Author: Aubrey Jaffer */
+
+#include "scm.h"
+#ifndef STDC_HEADERS
+	int free ();		/* P((char *ptr)) */
+#endif
+
+/* linkpath holds the filename which just got linked.  Scheme
+   *loadpath* will get set to linkpath and then restored around the
+   initialization call */
+/* static SCM linkpath; */
+
+#ifdef DLD
+# include "dld.h"
+
+void listundefs()
+{
+  int i;
+  char **undefs = dld_list_undefined_sym();
+  puts("   undefs:");
+  for(i = dld_undefined_sym_count;i--;) {
+    putc('"', stdout);
+    fputs(undefs[i], stdout);
+    puts("\"");
+  }
+  free(undefs);
+}
+
+static char s_link[] = "dyn:link", s_call[] = "dyn:call";
+SCM l_dyn_link(fname)
+     SCM fname;
+{
+  int status;
+  ASSERT(NIMP(fname) && STRINGP(fname), fname, ARG1, s_link);
+  DEFER_INTS;
+  status = dld_link(CHARS(fname));
+  ALLOW_INTS;
+  if (!status) {/* linkpath = fname; */ return fname;}
+  if (DLD_ENOFILE==status) return BOOL_F;
+  if (DLD_EBADOBJECT==status) return BOOL_F;
+  dld_perror("DLD");
+  return BOOL_F;
+}
+SCM l_dyn_call(symb, shl)
+     SCM symb, shl;
+{
+  int i;
+  void (*func)() = 0;
+/*  SCM oloadpath = *loc_loadpath; */
+  ASSERT(NIMP(symb) && STRINGP(symb), symb, ARG1, s_call);
+  DEFER_INTS;
+  if ((i = dld_function_executable_p(CHARS(symb))))
+    func = (void (*) ()) dld_get_func(CHARS(symb));
+  else dld_perror("DLDP");
+  ALLOW_INTS;
+  if (!i) listundefs();
+  if (!func) {
+    dld_perror("DLD");
+    return BOOL_F;
+  }
+/*  *loc_loadpath = linkpath; */
+  (*func) ();
+/*  *loc_loadpath = oloadpath; */
+  return BOOL_T;
+}
+static char s_main_call[] = "dyn:main-call";
+SCM l_dyn_main_call(symb, shl, args)
+     SCM symb, shl, args;
+{
+  int i;
+  int (*func)(int argc, char **argv) = 0;
+  char **argv;
+/*  SCM oloadpath = *loc_loadpath; */
+  ASSERT(NIMP(symb) && STRINGP(symb), symb, ARG1, s_main_call);
+  DEFER_INTS;
+  argv = makargvfrmstrs(args, s_main_call);
+  if ((i = dld_function_executable_p(CHARS(symb))))
+    func = (int (*) (int argc, char **argv)) dld_get_func(CHARS(symb));
+  else dld_perror("DLDP");
+  if (!i) listundefs();
+  if (!func) {
+    must_free_argv(argv);
+    ALLOW_INTS;
+    dld_perror("DLD");
+    return BOOL_F;
+  }
+  ALLOW_INTS;
+/*  *loc_loadpath = linkpath; */
+  i = (*func) ((int)ilength(args), argv);
+/*  *loc_loadpath = oloadpath; */
+  DEFER_INTS;
+  must_free_argv(argv);
+  ALLOW_INTS;
+  return MAKINUM(0L+i);
+}
+
+static char s_unlink[] = "dyn:unlink";
+SCM l_dyn_unlink(fname)
+     SCM fname;
+{
+  int status;
+  ASSERT(NIMP(fname) && STRINGP(fname), fname, ARG1, s_unlink);
+  DEFER_INTS;
+  status = dld_unlink_by_file(CHARS(fname), 1);
+  ALLOW_INTS;
+  if (!status) return BOOL_T;
+  dld_perror("DLD");
+  return BOOL_F;
+}
+static iproc subr1s[] = {
+	{s_link, l_dyn_link},
+	{s_unlink, l_dyn_unlink},
+	{0, 0}};
+void init_dynl()
+{
+# ifndef RTL
+  if (!execpath) execpath = dld_find_executable(CHARS(CAR(progargs)));
+  if (dld_init(execpath)) {
+    dld_perror("DLD:");
+/*    wta(CAR(progargs), "couldn't init", "dld"); */
+    return;
+  }
+# endif
+  init_iprocs(subr1s, tc7_subr_1);
+  make_subr(s_call, tc7_subr_2, l_dyn_call);
+  make_subr(s_main_call, tc7_lsubr_2, l_dyn_main_call);
+  add_feature("dld");
+# ifdef DLD_DYNCM
+  add_feature("dld:dyncm");
+# endif
+}
+#else
+
+# ifdef hpux
+#  include "dl.h"
+
+#  define SHL(obj) ((shl_t*)CDR(obj))
+int prinshl(exp, port, writing)
+     SCM exp; SCM port; int writing;
+{
+  lputs("#<shl ", port);
+  intprint(CDR(exp), 16, port);
+  lputc('>', port);
+  return 1;
+}
+int tc16_shl;
+static smobfuns shlsmob = {mark0, free0, prinshl};
+
+static char s_link[] = "dyn:link", s_call[] = "dyn:call";
+SCM l_dyn_link(fname)
+     SCM fname;
+{
+  SCM z;
+  shl_t shl;
+  ASSERT(NIMP(fname) && STRINGP(fname), fname, ARG1, s_link);
+  DEFER_INTS;
+  shl = shl_load(CHARS(fname), BIND_DEFERRED , 0L);
+  if (NULL==shl) {
+    ALLOW_INTS;
+    return BOOL_F;
+  }
+  NEWCELL(z);
+  SETCHARS(z, shl);
+  CAR(z) = tc16_shl;
+  ALLOW_INTS;
+/*  linkpath = fname; */
+  return z;
+}
+SCM l_dyn_call(symb, shl)
+     SCM symb, shl;
+{
+  void (*func)() = 0;
+  int i;
+/*  SCM oloadpath = *loc_loadpath; */
+  ASSERT(NIMP(symb) && STRINGP(symb), symb, ARG1, s_call);
+  ASSERT(NIMP(shl) && CAR(shl)==tc16_shl, shl, ARG2, s_call);
+  DEFER_INTS;
+  if ((i = shl_findsym(&SHL(shl),
+		       CHARS(symb),
+		       TYPE_PROCEDURE, &func)) != 0) {
+    puts("    undef:"); puts(CHARS(symb));
+  }
+  ALLOW_INTS;
+  if (i != 0) return BOOL_F;
+/*  *loc_loadpath = linkpath; */
+  (*func) ();
+/*  *loc_loadpath = oloadpath; */
+  return BOOL_T;
+}
+
+static char s_main_call[] = "dyn:main-call";
+SCM l_dyn_main_call(symb, shl, args)
+     SCM symb, shl, args;
+{
+  int i;
+  int (*func)P((int argc, char **argv)) = 0; 
+  char **argv;
+/*  SCM oloadpath = *loc_loadpath; */
+  ASSERT(NIMP(symb) && STRINGP(symb), symb, ARG1, s_main_call);
+  ASSERT(NIMP(shl) && CAR(shl)==tc16_shl, shl, ARG2, s_main_call);
+  DEFER_INTS;
+  if ((i = shl_findsym(&SHL(shl),
+		       CHARS(symb),
+		       TYPE_PROCEDURE, &func)) != 0) {
+    puts("    undef:"); puts(CHARS(symb));
+  }
+  argv = makargvfrmstrs(args, s_main_call);
+  ALLOW_INTS;
+  if (i != 0) return BOOL_F;
+/*  *loc_loadpath = linkpath; */
+  i = (*func) ((int)ilength(args), argv);
+/*  *loc_loadpath = oloadpath; */
+  DEFER_INTS;
+  must_free_argv(argv);
+  ALLOW_INTS;
+  return MAKINUM(0L+i);
+}
+
+static char s_unlink[] = "dyn:unlink";
+SCM l_dyn_unlink(shl)
+     SCM shl;
+{
+  int status;
+  ASSERT(NIMP(shl) && CAR(shl)==tc16_shl, shl, ARG1, s_unlink);
+  DEFER_INTS;
+  status = shl_unload(SHL(shl));
+  ALLOW_INTS;
+  if (!status) return BOOL_T;
+  return BOOL_F;
+}
+static iproc subr1s[] = {
+	{s_link, l_dyn_link},
+	{s_unlink, l_dyn_unlink},
+	{0, 0}};
+void init_dynl()
+{
+  tc16_shl = newsmob(&shlsmob);
+  init_iprocs(subr1s, tc7_subr_1);
+  make_subr(s_call, tc7_subr_2, l_dyn_call);
+  make_subr(s_main_call, tc7_lsubr_2, l_dyn_main_call);
+  add_feature("shl");
+}
+# endif
+#endif
+
+#ifdef vms
+/* This permits dynamic linking. For example, the procedure of 0 arguments
+   from a file could be the initialization procedure.
+   (vms:dynamic-link-call "MYDISK:[MYDIR].EXE" "foo" "INIT_FOO")
+   The first argument specifies the directory where the file specified
+   by the second argument resides.  The current directory would be
+   "SYS$DISK:[].EXE".
+   The second argument cannot contain any punctuation.
+   The third argument probably needs to be uppercased to mimic the VMS linker.
+   */
+
+# include <descrip.h>
+# include <ssdef.h>
+# include <rmsdef.h>
+
+struct dsc$descriptor *descriptorize(x, buff)
+     struct dsc$descriptor *x;
+     SCM buff;
+{(*x).dsc$w_length = LENGTH(buff);
+ (*x).dsc$a_pointer = CHARS(buff);
+ (*x).dsc$b_class = DSC$K_CLASS_S;
+ (*x).dsc$b_dtype = DSC$K_DTYPE_T;
+ return(x);}
+
+static char s_dynl[] = "vms:dynamic-link-call";
+SCM dynl(dir, symbol, fname)
+     SCM dir, symbol, fname;
+{
+  struct dsc$descriptor fnamed, symbold, dird;
+  void (*fcn)();
+  long retval;
+  ASSERT(IMP(dir) || STRINGP(dir), dir, ARG1, s_dynl);
+  ASSERT(NIMP(fname) && STRINGP(fname), fname, ARG2, s_dynl);
+  ASSERT(NIMP(symbol) && STRINGP(symbol), symbol, ARG3, s_dynl);
+  descriptorize(&fnamed, fname);
+  descriptorize(&symbold, symbol);
+  DEFER_INTS;
+  retval = lib$find_image_symbol(&fnamed, &symbold, &fcn,
+				 IMP(dir) ? 0 : descriptorize(&dird, dir));
+  if (SS$_NORMAL != retval) {
+    /* wta(MAKINUM(retval), "vms error", s_dynl); */
+    ALLOW_INTS;
+    return BOOL_F;
+  }
+  ALLOW_INTS;
+/*  *loc_loadpath = dir; */
+  (*fcn)();
+/*  *loc_loadpath = oloadpath; */
+  return BOOL_T;
+}
+
+void init_dynl()
+{
+  make_subr(s_dynl, tc7_subr_3, dynl);
+}
+#endif
+
+
+#ifdef SUN_DL
+# include <dlfcn.h>
+
+# define SHL(obj) ((void*)CDR(obj))
+
+# ifdef SVR4		/* Solaris 2. */
+#  define DLOPEN_MODE	RTLD_LAZY
+# else
+#  define DLOPEN_MODE	1	/* Thats what it says in the man page. */
+# endif
+
+sizet frshl(ptr)
+	CELLPTR ptr;
+{
+# if 0
+  /* Should freeing a shl close and possibly unmap the object file it */
+  /* refers to? */
+  if(SHL(ptr))
+    dlclose(SHL(ptr));
+# endif
+  return 0;
+}
+
+int prinshl(exp, port, writing)
+	SCM exp; SCM port; int writing;
+{
+  lputs("#<shl ", port);
+  intprint(CDR(exp), 16, port);
+  lputc('>', port);
+  return 1;
+}
+int tc16_shl;
+static smobfuns shlsmob = {mark0, frshl, prinshl};
+
+static char s_link[] = "dyn:link", s_call[] = "dyn:call";
+SCM l_dyn_link(fname)
+	SCM fname;
+{
+  SCM z;
+  void *handle;
+  if FALSEP(fname) return fname;
+  ASSERT(NIMP(fname) && STRINGP(fname), fname, ARG1, s_link);
+  DEFER_INTS;
+  handle = dlopen(CHARS(fname), DLOPEN_MODE);
+  if (NULL==handle) {
+    ALLOW_INTS;
+    return BOOL_F;
+  }
+  NEWCELL(z);
+  SETCHARS(z, handle);
+  CAR(z) = tc16_shl;
+  ALLOW_INTS;
+/*  linkpath = fname; */
+  return z;
+}
+
+SCM l_dyn_call(symb, shl)
+	SCM symb, shl;
+{
+  void (*func)() = 0;
+/*  SCM oloadpath = *loc_loadpath; */
+  ASSERT(NIMP(symb) && STRINGP(symb), symb, ARG1, s_call);
+  ASSERT(NIMP(shl) && CAR(shl)==tc16_shl, shl, ARG2, s_call);
+  DEFER_INTS;
+  func = dlsym(SHL(shl), CHARS(symb));
+  if (!func) {
+    const char *dlr = dlerror();
+    ALLOW_INTS;
+    if (dlr) puts(dlr);
+    return BOOL_F;
+  }
+  ALLOW_INTS;
+/*  *loc_loadpath = linkpath; */
+  (*func) ();
+/*  *loc_loadpath = oloadpath; */
+  return BOOL_T;
+}
+static char s_unlink[] = "dyn:unlink";
+SCM l_dyn_unlink(shl)
+	SCM shl;
+{
+  int status;
+  ASSERT(NIMP(shl) && CAR(shl)==tc16_shl, shl, ARG1, s_unlink);
+  DEFER_INTS;
+  status = dlclose(SHL(shl));
+  SETCHARS(shl, NULL);
+  ALLOW_INTS;
+  if (!status) return BOOL_T;
+  return BOOL_F;
+}
+static iproc subr1s[] = {
+{s_link, l_dyn_link},
+{s_unlink, l_dyn_unlink},
+{0, 0}};
+
+void init_dynl()
+{
+  tc16_shl = newsmob(&shlsmob);
+  init_iprocs(subr1s, tc7_subr_1);
+  make_subr(s_call, tc7_subr_2, l_dyn_call);
+  add_feature("sun-dl");
+}
+#endif	/* SUN_DL */