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Second try: Introduce plugin_crt0.c that every plugin links.

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It handles exit() properly, calling the handler also when the plugin returns
normally (also make exit() more standard compliant while at it).
It also holds PLUGIN_HEADER, so that it doesn't need to be in each plugin anymore.

To work better together with callbacks passed to rb->default_event_handler_ex() introduce exit_on_usb() which will call the exit handler before showing the usb screen and exit() after it.
In most cases rb->default_event_handler_ex() was passed a callback which was manually called at all other return points. This can now be done via atexit().

In future plugin_crt0.c could also handle clearing bss, initializing iram and more.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27873 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2010-08-24 14:30:46 +00:00
parent 3478bc5d6d
commit cae4ae2c71
142 changed files with 372 additions and 341 deletions
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8
apps/plugins/plugins.make
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@ -33,7 +33,7 @@ PLUGIN_LDS := $(APPSDIR)/plugins/plugin.lds
PLUGINLINK_LDS := $(BUILDDIR)/apps/plugins/plugin.link
OVERLAYREF_LDS := $(BUILDDIR)/apps/plugins/overlay_ref.link
endif
PLUGIN_CRT0 := $(BUILDDIR)/apps/plugins/plugin_crt0.o
# multifile plugins (subdirs):
PLUGINSUBDIRS := $(call preprocess, $(APPSDIR)/plugins/SUBDIRS)
@ -49,7 +49,7 @@ PLUGINFLAGS = -I$(APPSDIR)/plugins -DPLUGIN $(CFLAGS)
$(ROCKS1): $(BUILDDIR)/%.rock: $(BUILDDIR)/%.o
# dependency for all plugins
$(ROCKS): $(APPSDIR)/plugin.h $(PLUGINLINK_LDS) $(PLUGINLIB) $(PLUGINBITMAPLIB)
$(ROCKS): $(APPSDIR)/plugin.h $(PLUGINLINK_LDS) $(PLUGINLIB) $(PLUGINBITMAPLIB) $(PLUGIN_CRT0) $(LIBSETJMP)
$(PLUGINLIB): $(PLUGINLIB_OBJ)
$(SILENT)$(shell rm -f $@)
@ -89,7 +89,7 @@ else
endif
PLUGINLDFLAGS += $(GLOBAL_LDOPTS)
$(BUILDDIR)/%.rock: $(LIBSETJMP)
$(BUILDDIR)/%.rock:
$(call PRINTS,LD $(@F))$(CC) $(PLUGINFLAGS) -o $(BUILDDIR)/$*.elf \
$(filter %.o, $^) \
$(filter %.a, $+) \
@ -103,7 +103,7 @@ endif
$(BUILDDIR)/apps/plugins/%.lua: $(ROOTDIR)/apps/plugins/%.lua
$(call PRINTS,CP $(subst $(ROOTDIR)/,,$<))cp $< $(BUILDDIR)/apps/plugins/
$(BUILDDIR)/%.refmap: $(APPSDIR)/plugin.h $(OVERLAYREF_LDS) $(PLUGINLIB) $(PLUGINBITMAPLIB)
$(BUILDDIR)/%.refmap: $(APPSDIR)/plugin.h $(OVERLAYREF_LDS) $(PLUGINLIB) $(PLUGINBITMAPLIB) $(LIBSETJMP) $(PLUGIN_CRT0)
$(call PRINTS,LD $(@F))$(CC) $(PLUGINFLAGS) -o /dev/null \
$(filter %.o, $^) \
$(filter %.a, $+) \