#endif
#include <stdlib.h>
+#include "lisp.h"
#include "sysdll.h"
/* This whole file is conditional upon HAVE_SHLIB */
/* Thankfully, most systems follow the ELFish dlopen() method.
*/
+
#if defined(HAVE_DLOPEN)
#include <dlfcn.h>
# define RTLD_LAZY 1
#endif /* RTLD_LAZY isn't defined under FreeBSD - ick */
-#ifndef RTLD_GLOBAL
-# define RTLD_GLOBAL 0
-#endif
-
#ifndef RTLD_NOW
# define RTLD_NOW 2
#endif
return 0;
}
+
dll_handle
dll_open (const char *fname)
{
- return (dll_handle) dlopen (fname, RTLD_NOW | RTLD_GLOBAL);
+ return (dll_handle) dlopen (fname, RTLD_NOW);
}
int
return "Generic shared library error";
}
-#elif defined(HAVE_INIT_DLD)
+#elif defined(HAVE_DLD_INIT)
#include <dld.h>
int
dll_init (const char *arg)
{
return "Windows DLL Error";
}
+#elif defined(HAVE_DYLD)
+
+/*
+ This section supports MacOSX dynamic libraries. Dynamically
+ loadable libraries must be compiled as bundles, not dynamiclibs.
+*/
+
+#include <mach-o/dyld.h>
+
+int
+dll_init (const char *arg)
+{
+ return 0;
+}
+
+dll_handle
+dll_open (const char *fname)
+{
+ NSObjectFileImage file;
+ NSObjectFileImageReturnCode ret;
+
+ /*
+ * MacOS X dll support is for bundles, not the current executable, so return
+ * NULL is this case. However, dll_function() uses a special hack where a
+ * NULL handle can be used to find executable symbols. This satisfies the
+ * needs of ui-gtk.c but is not a general solution.
+ */
+ if (fname == NULL)
+ return NULL;
+
+ ret = NSCreateObjectFileImageFromFile(fname, &file);
+
+ if (ret != NSObjectFileImageSuccess) {
+ return NULL;
+ }
+
+ return (dll_handle)NSLinkModule(file, fname,
+ NSLINKMODULE_OPTION_BINDNOW |
+ NSLINKMODULE_OPTION_PRIVATE |
+ NSLINKMODULE_OPTION_RETURN_ON_ERROR);
+}
+
+int
+dll_close (dll_handle h)
+{
+ return NSUnLinkModule((NSModule)h, NSUNLINKMODULE_OPTION_NONE);
+}
+
+/* Given an address, return the mach_header for the image containing it
+ * or zero if the given address is not contained in any loaded images.
+ *
+ * Note: image_for_address(), my_find_image() and search_linked_libs() are
+ * based on code from the dlcompat library
+ * (http://www.opendarwin.org/projects/dlcompat).
+ */
+
+static struct mach_header*
+image_for_address(void *address)
+{
+ unsigned long i;
+ unsigned long count = _dyld_image_count();
+ struct mach_header *mh = 0;
+
+ for (i = 0; i < count; i++)
+ {
+ unsigned long addr = (unsigned long)address -
+ _dyld_get_image_vmaddr_slide(i);
+ mh = _dyld_get_image_header(i);
+
+ if (mh)
+ {
+ struct load_command *lc =
+ (struct load_command *)((char *)mh + sizeof(struct mach_header));
+ unsigned long j;
+
+ for (j = 0; j < mh->ncmds;
+ j++, lc = (struct load_command *)((char *)lc + lc->cmdsize))
+ {
+ if (LC_SEGMENT == lc->cmd &&
+ addr >= ((struct segment_command *)lc)->vmaddr &&
+ addr <
+ ((struct segment_command *)lc)->vmaddr +
+ ((struct segment_command *)lc)->vmsize)
+ {
+ goto image_found;
+ }
+ }
+ }
+
+ mh = 0;
+ }
+
+ image_found:
+ return mh;
+}
+
+static const struct mach_header*
+my_find_image(const char *name)
+{
+ const struct mach_header *mh = (struct mach_header *)
+ NSAddImage(name, NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED |
+ NSADDIMAGE_OPTION_RETURN_ON_ERROR);
+
+ if (!mh)
+ {
+ int count = _dyld_image_count();
+ int j;
+
+ for (j = 0; j < count; j++)
+ {
+ const char *id = _dyld_get_image_name(j);
+
+ if (!strcmp(id, name))
+ {
+ mh = _dyld_get_image_header(j);
+ break;
+ }
+ }
+ }
+
+ return mh;
+}
+
+/*
+ * dyld adds libraries by first adding the directly dependant libraries in
+ * link order, and then adding the dependencies for those libraries, so we
+ * should do the same... but we don't bother adding the extra dependencies, if
+ * the symbols are neither in the loaded image nor any of it's direct
+ * dependencies, then it probably isn't there.
+ */
+static NSSymbol
+search_linked_libs(const struct mach_header * mh, const char *symbol)
+{
+ int n;
+ NSSymbol nssym = 0;
+
+ struct load_command *lc =
+ (struct load_command *)((char *)mh + sizeof(struct mach_header));
+
+ for (n = 0; n < mh->ncmds;
+ n++, lc = (struct load_command *)((char *)lc + lc->cmdsize))
+ {
+ if ((LC_LOAD_DYLIB == lc->cmd) || (LC_LOAD_WEAK_DYLIB == lc->cmd))
+ {
+ struct mach_header *wh;
+
+ if ((wh = (struct mach_header *)
+ my_find_image((char *)(((struct dylib_command *)lc)->dylib.name.offset +
+ (char *)lc))))
+ {
+ if (NSIsSymbolNameDefinedInImage(wh, symbol))
+ {
+ nssym =
+ NSLookupSymbolInImage(wh,
+ symbol,
+ NSLOOKUPSYMBOLINIMAGE_OPTION_BIND |
+ NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
+ break;
+ }
+ }
+ }
+ }
+
+ return nssym;
+}
+
+dll_func
+dll_function (dll_handle h, const char *n)
+{
+ NSSymbol sym = 0;
+#ifdef DLSYM_NEEDS_UNDERSCORE
+ char *buf = alloca_array (char, strlen (n) + 2);
+ *buf = '_';
+ strcpy (buf + 1, n);
+ n = buf;
+#endif
+
+ /* NULL means the program image and shared libraries, not bundles. */
+
+ if (h == NULL)
+ {
+ /* NOTE: This assumes that this function is included in the main program
+ and not in a shared library. */
+ const struct mach_header* my_mh = image_for_address(&dll_function);
+
+ if (NSIsSymbolNameDefinedInImage(my_mh, n))
+ {
+ sym =
+ NSLookupSymbolInImage(my_mh,
+ n,
+ NSLOOKUPSYMBOLINIMAGE_OPTION_BIND |
+ NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
+ }
+
+ if (!sym)
+ {
+ sym = search_linked_libs(my_mh, n);
+ }
+ }
+ else
+ {
+ sym = NSLookupSymbolInModule((NSModule)h, n);
+ }
+
+ if (sym == 0) return 0;
+ return (dll_func)NSAddressOfSymbol(sym);
+}
+
+dll_var
+dll_variable (dll_handle h, const char *n)
+{
+ NSSymbol sym;
+#ifdef DLSYM_NEEDS_UNDERSCORE
+ char *buf = alloca_array (char, strlen (n) + 2);
+ *buf = '_';
+ strcpy (buf + 1, n);
+ n = buf;
+#endif
+ sym = NSLookupSymbolInModule((NSModule)h, n);
+ if (sym == 0) return 0;
+ return (dll_var)NSAddressOfSymbol(sym);
+}
+
+const char *
+dll_error (dll_handle h)
+{
+ NSLinkEditErrors c;
+ int errorNumber;
+ const char *fileNameWithError, *errorString;
+ NSLinkEditError(&c, &errorNumber, &fileNameWithError, &errorString);
+ return errorString;
+}
+
+
#else
-/* Catchall if we don't know about this systems method of dynamic loading */
+/* Catchall if we don't know about this system's method of dynamic loading */
int
dll_init (const char *arg)
{
projects / chise / xemacs-chise.git.1 / blobdiff