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Diffstat (limited to 'dynl.c')
| -rw-r--r-- | dynl.c | 448 |
1 files changed, 448 insertions, 0 deletions
@@ -0,0 +1,448 @@ +/* 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 */ |