Build system support for grub-emu modules

Makefile.in

@@ -43,6 +43,7 @@ pkglibdir =  $(libdir)/`echo @PACKAGE_TARNAME@/$(target_cpu)-$(platform) | sed '
 
 # Internationalization library.
 LIBINTL = @LIBINTL@
+TARGET_NO_MODULES = @TARGET_NO_MODULES@
 
 XGETTEXT = @XGETTEXT@
 MSGMERGE = @MSGMERGE@
@@ -175,10 +176,15 @@ include $(srcdir)/conf/tests.mk
 -include $(wildcard $(GRUB_CONTRIB)/*/conf/common.mk)
 endif
 
+ifeq ($(TARGET_NO_MODULES), yes)
+	TARGET_CFLAGS += -DGRUB_TARGET_NO_MODULES=1
+	CFLAGS += -DGRUB_TARGET_NO_MODULES=1
+endif
+
 ### General targets.
 
 CLEANFILES += $(pkglib_DATA) $(pkgdata_DATA) po/*.mo
-ifneq ($(platform), emu)
+ifneq ($(TARGET_NO_MODULES), yes)
 pkglib_DATA += moddep.lst command.lst fs.lst partmap.lst parttool.lst handler.lst video.lst crypto.lst terminal.lst
 endif
 moddep.lst: $(DEFSYMFILES) $(UNDSYMFILES) genmoddep.awk

conf/any-emu.rmk

@@ -13,30 +13,33 @@ pkglib_PROGRAMS = kernel.img
 kernel_img_SOURCES = kern/device.c kern/disk.c kern/dl.c  kern/env.c	\
 	kern/err.c kern/list.c kern/handler.c				\
 	kern/command.c kern/corecmd.c kern/file.c			\
-	kern/fs.c commands/boot.c kern/main.c kern/misc.c kern/parser.c	\
+	kern/fs.c kern/main.c kern/misc.c kern/parser.c	\
 	kern/partition.c kern/term.c					\
 	kern/rescue_reader.c kern/rescue_parser.c			\
 	\
 	util/console.c  util/grub-emu.c util/misc.c			\
 	util/hostdisk.c util/getroot.c					\
 	\
-	grub_emu_init.c
+	gnulib/progname.c util/hostfs.c
-kernel_img_CFLAGS = $(CPPFLAGS) $(CFLAGS)
+kernel_img_HEADERS = boot.h cache.h device.h disk.h dl.h elf.h elfload.h \
+	env.h err.h file.h fs.h kernel.h loader.h misc.h mm.h net.h parser.h \
+	partition.h msdos_partition.h reader.h symbol.h term.h time.h types.h \
+	list.h handler.h command.h i18n.h env_private.h
+kernel_img_CFLAGS = $(CPPFLAGS) $(CFLAGS) -Wno-undef
 kernel_img_LDFLAGS = $(COMMON_LDFLAGS)
 TARGET_NO_STRIP = yes
-TARGET_NO_DYNAMIC_MODULES = yes
 
-# progname.c always has warnings. Compile it separately.
+ifneq ($(TARGET_NO_MODULES), yes)
-pkglib_MODULES += progname.mod
+kernel_img_SOURCES += symlist.c
-progname_mod_SOURCES = gnulib/progname.c
+else
-progname_mod_CFLAGS = $(COMMON_CFLAGS) -Wno-error
+kernel_img_SOURCES += grub_emu_init.c
-progname_mod_LDFLAGS = $(COMMON_LDFLAGS)
+endif
 
-# For hostfs.mod.
+# For boot.mod.
-pkglib_MODULES += hostfs.mod
+pkglib_MODULES += boot.mod
-hostfs_mod_SOURCES = util/hostfs.c
+boot_mod_SOURCES = commands/boot.c lib/i386/pc/biosnum.c
-hostfs_mod_CFLAGS = $(COMMON_CFLAGS)
+boot_mod_CFLAGS = $(COMMON_CFLAGS)
-hostfs_mod_LDFLAGS = $(COMMON_LDFLAGS)
+boot_mod_LDFLAGS = $(COMMON_LDFLAGS)
 
 # For host.mod.
 pkglib_MODULES += host.mod
@@ -77,8 +80,10 @@ endif
 ifeq ($(enable_grub_emu_sdl), yes)
 pkglib_MODULES += sdl.mod
 sdl_mod_SOURCES = util/sdl.c
+sdl_mod_CFLAGS = $(COMMON_CFLAGS)
 sdl_mod_LDFLAGS = $(COMMON_LDFLAGS)
 grub_emu_LDFLAGS += $(LIBSDL)
+kernel_img_HEADERS += sdl.h
 endif
 
 ifeq ($(enable_grub_emu_pci), yes)
@@ -90,6 +95,14 @@ endif
 
 include $(srcdir)/conf/common.mk
 
+MOSTLYCLEANFILES += symlist.c kernel_syms.lst
+DEFSYMFILES += kernel_syms.lst
+symlist.c: $(addprefix include/grub/,$(kernel_img_HEADERS)) config.h gensymlist.sh
+	/bin/sh gensymlist.sh $(filter %.h,$^) > $@ || (rm -f $@; exit 1)
+
+kernel_syms.lst: $(addprefix include/grub/,$(kernel_img_HEADERS)) config.h genkernsyms.sh
+	/bin/sh genkernsyms.sh $(filter %.h,$^) > $@ || (rm -f $@; exit 1)
+
 grub_emu_init.h: genemuinitheader.sh $(pkglib_MODULES)
 	rm -f $@; echo $(pkglib_MODULES) | sh $(srcdir)/genemuinitheader.sh $(NM)  > $@
 DISTCLEANFILES += grub_emu_init.h
@@ -99,7 +112,12 @@ grub_emu_init.c: genemuinit.sh $(pkglib_MODULES)
 DISTCLEANFILES += grub_emu_init.c
 
 CLEANFILES += grub-emu
+ifneq ($(TARGET_NO_MODULES), yes)
+grub-emu: $(pkglib_PROGRAMS)
+	$(CC) -o $@ $(pkglib_PROGRAMS) $(grub_emu_LDFLAGS) $(LDFLAGS)
+else
 grub-emu: $(pkglib_MODULES) $(pkglib_PROGRAMS)
 	$(CC) -o $@ $(pkglib_MODULES) $(pkglib_PROGRAMS) $(grub_emu_LDFLAGS) $(LDFLAGS)
+endif
 GRUB_EMU=grub-emu
 

configure.ac

@@ -548,6 +548,10 @@ AC_ARG_ENABLE([grub-emu-pci],
 	      [AS_HELP_STRING([--enable-grub-emu-pci],
                              [build and install the `grub-emu' debugging utility with PCI support (potentially dangerous) (default=no)])])
 
+AC_ARG_ENABLE([grub-emu-modules],
+	      [AS_HELP_STRING([--enable-grub-emu-modules],
+                             [Support module loading in `grub-emu' debugging utility (default=no)])])
+
 if test "$platform" = emu; then
   missing_ncurses=
 [# Check for curses libraries.]
@@ -566,6 +570,13 @@ if test x"$missing_ncurses" = xtrue ; then
   AC_MSG_ERROR([grub-emu can't be compiled without ncurses])
 fi
 
+if test x"$enable_grub_emu_modules" = xyes ; then
+  TARGET_NO_MODULES=no
+else
+  TARGET_NO_MODULES=yes
+fi
+AC_SUBST(TARGET_NO_MODULES)
+
 if test x"$enable_grub_emu_usb" = xno ; then
   grub_emu_usb_excuse="explicitly disabled"
 fi
@@ -733,6 +744,11 @@ echo PCI support for grub-emu: Yes
 else
 echo PCI support for grub-emu: No "($grub_emu_pci_excuse)"
 fi
+if [ x"$TARGET_NO_MODULES" = xno ]; then
+echo Module support for grub-emu: Yes
+else
+echo Module support for grub-emu: No
+fi
 fi
 if [ x"$enable_mm_debug" = xyes ]; then
 echo With memory debugging: Yes

genmk.rb

@@ -143,7 +143,7 @@ mostlyclean-module-#{@name}.#{@rule_count}:
 MOSTLYCLEAN_MODULE_TARGETS += mostlyclean-module-#{@name}.#{@rule_count}
 UNDSYMFILES += #{undsym}
 
-ifeq ($(TARGET_NO_DYNAMIC_MODULES), yes)
+ifeq ($(TARGET_NO_MODULES), yes)
 #{@name}: #{pre_obj} $(TARGET_OBJ2ELF)
 	-rm -f $@
 	$(TARGET_CC) $(#{prefix}_LDFLAGS) $(TARGET_LDFLAGS) -Wl,-r,-d -o $@ #{pre_obj}
@@ -322,28 +322,32 @@ class Program
   end
   attr_reader :dir, :name
 
+  def print_tail()
+    prefix = @name.to_var
+    print "CLEANFILES += #{@name} $(#{prefix}_OBJECTS)
+ifeq ($(#{prefix}_RELOCATABLE),yes)
+#{@name}: $(#{prefix}_DEPENDENCIES) $(#{prefix}_OBJECTS)
+	$(TARGET_CC) -Wl,-r,-d -o $@ $(#{prefix}_OBJECTS) $(TARGET_LDFLAGS) $(#{prefix}_LDFLAGS)
+	if test x$(TARGET_NO_STRIP) != xyes ; then $(STRIP) --strip-unneeded -K start -R .note -R .comment $@; fi
+else
+#{@name}: $(#{prefix}_DEPENDENCIES) $(#{prefix}_OBJECTS)
+	$(TARGET_CC) -o $@ $(#{prefix}_OBJECTS) $(TARGET_LDFLAGS) $(#{prefix}_LDFLAGS)
+	if test x$(TARGET_NO_STRIP) != xyes ; then $(STRIP) -R .rel.dyn -R .reginfo -R .note -R .comment $@; fi
+endif
+
+"
+  end
+
   def rule(sources)
     prefix = @name.to_var
     objs = sources.collect do |src|
       raise "unknown source file `#{src}'" if /\.[cS]$/ !~ src
       prefix + '-' + src.to_obj
     end
-    objs_str = objs.join(' ');
     deps = objs.collect {|obj| obj.suffix('d')}
     deps_str = deps.join(' ');
 
-    "CLEANFILES += #{@name} #{objs_str}
+    "MOSTLYCLEANFILES += #{deps_str}
-MOSTLYCLEANFILES += #{deps_str}
-
-ifeq ($(#{prefix}_RELOCATABLE),yes)
-#{@name}: $(#{prefix}_DEPENDENCIES) #{objs_str}
-	$(TARGET_CC) -Wl,-r,-d -o $@ #{objs_str} $(TARGET_LDFLAGS) $(#{prefix}_LDFLAGS)
-	if test x$(TARGET_NO_STRIP) != xyes ; then $(STRIP) --strip-unneeded -K start -R .note -R .comment $@; fi
-else
-#{@name}: $(#{prefix}_DEPENDENCIES) #{objs_str}
-	$(TARGET_CC) -o $@ #{objs_str} $(TARGET_LDFLAGS) $(#{prefix}_LDFLAGS)
-	if test x$(TARGET_NO_STRIP) != xyes ; then $(STRIP) -R .rel.dyn -R .reginfo -R .note -R .comment $@; fi
-endif
 
 " + objs.collect_with_index do |obj, i|
       src = sources[i]
@@ -358,6 +362,7 @@ endif
 
 -include #{dep}
 
+#{prefix}_OBJECTS += #{obj}
 "
     end.join('')
   end
@@ -466,4 +471,5 @@ while l = gets
 
 end
 utils.each {|util| util.print_tail()}
+programs.each {|program| program.print_tail()}
 

genmoddep.awk

@@ -32,13 +32,13 @@ FNR == 1 {
   else if ($1 != "__gnu_local_gp") {
     printf "%s in %s is not defined\n", $1, module >"/dev/stderr";
     error++;
-    exit;
+#    exit;
   }
 }
 
 # Output the result.
 END {
-  if (error == 1)
+  if (error != 0)
     exit 1;
 
   for (mod in modtab) {

include/grub/dl.h

@@ -91,7 +91,7 @@ grub_dl_t grub_dl_load_core (void *addr, grub_size_t size);
 int EXPORT_FUNC(grub_dl_unload) (grub_dl_t mod);
 void grub_dl_unload_unneeded (void);
 void grub_dl_unload_all (void);
-#if defined (GRUB_MACHINE_EMU) || defined (GRUB_UTIL)
+#if defined (GRUB_UTIL) || defined (GRUB_TARGET_NO_MODULES)
 #define GRUB_NO_MODULES 1
 #else
 #define GRUB_NO_MODULES 0
@@ -121,7 +121,7 @@ grub_err_t grub_dl_register_symbol (const char *name, void *addr,
 grub_err_t grub_arch_dl_check_header (void *ehdr);
 grub_err_t grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr);
 
-#if defined (_mips) && ! defined (GRUB_UTIL) && !defined (GRUB_MACHINE_EMU)
+#if defined (_mips) && ! GRUB_NO_MODULES
 #define GRUB_LINKER_HAVE_INIT 1
 void grub_arch_dl_init_linker (void);
 #endif

include/grub/sdl.h

@@ -0,0 +1,24 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2010  Free Software Foundation, Inc.
+ *
+ *  GRUB 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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+void EXPORT_FUNC (SDL_Quit) (void);
+void EXPORT_FUNC (SDL_SetColors) (void);
+void EXPORT_FUNC (SDL_Init) (void);
+void EXPORT_FUNC (SDL_GetError) (void);
+void EXPORT_FUNC (SDL_Flip) (void);
+void EXPORT_FUNC (SDL_SetVideoMode) (void);

util/grub-emu.c

@@ -146,6 +146,9 @@ usage (int status)
 }
 
 
+void grub_hostfs_init (void);
+void grub_hostfs_fini (void);
+
 int
 main (int argc, char *argv[])
 {
@@ -204,11 +207,14 @@ main (int argc, char *argv[])
 
   signal (SIGINT, SIG_IGN);
   grub_console_init ();
+  grub_hostfs_init ();
 
   /* XXX: This is a bit unportable.  */
   grub_util_biosdisk_init (dev_map);
 
+#if GRUB_NO_MODULES
   grub_init_all ();
+#endif
 
   /* Make sure that there is a root device.  */
   if (! root_dev)
@@ -235,7 +241,10 @@ main (int argc, char *argv[])
   if (setjmp (main_env) == 0)
     grub_main ();
 
+#if GRUB_NO_MODULES
   grub_fini_all ();
+#endif
+  grub_hostfs_fini ();
 
   grub_machine_fini ();
 

util/misc.c

@@ -319,10 +319,12 @@ grub_mm_init_region (void *addr __attribute__ ((unused)),
 {
 }
 
+#if GRUB_NO_MODULES
 void
 grub_register_exported_symbols (void)
 {
 }
+#endif
 
 void
 grub_exit (void)