From b31aeb387646c04061abf1e0544d39c92744f1f1 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Sat, 28 Aug 2010 19:46:58 +0000
Subject: Some link improvements

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2895 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/configs/ea3131/locked/Makefile    | 32 ++++++++++++++++++++++++++------
 nuttx/configs/ea3131/locked/mklocked.sh |  9 ++-------
 2 files changed, 28 insertions(+), 13 deletions(-)

diff --git a/nuttx/configs/ea3131/locked/Makefile b/nuttx/configs/ea3131/locked/Makefile
index db552a771..b4566ae40 100755
--- a/nuttx/configs/ea3131/locked/Makefile
+++ b/nuttx/configs/ea3131/locked/Makefile
@@ -33,38 +33,58 @@
 #
 ############################################################################
 
+-include $(TOPDIR)/.config
 -include $(TOPDIR)/Make.defs
 
+# Remove the application library (libapp) from the list of libraries.
+
+PASS1_LIBAPP	= $(CONFIG_APP_DIR)/libapp$(LIBEXT)
+PASS1_LINKLIBS	= $(filter-out $(PASS1_LIBAPP),$(LINKLIBS))
+
+# Get the paths to the libraries and the links script path in format that
+# is appropriate for the host OS
+
 ifeq ($(WINTOOL),y)
   # Windows-native toolchains
-  PASS1_LIBPATHS	= ${shell for path in $(LINKLIBS); do dir=`dirname $(TOPDIR)/$$path`;echo "-L\"`cygpath -w $$dir`\"";done}
+  PASS1_LIBPATHS	= ${shell for path in $(PASS1_LINKLIBS); do dir=`dirname $(TOPDIR)/$$path`;echo "-L\"`cygpath -w $$dir`\"";done}
   PASS1_LDSCRIPT	= -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/locked/ld-locked.inc}"
 else
   # Linux/Cygwin-native toolchain 
-  PASS1_LIBPATHS	= $(addprefix -L$(TOPDIR)/,$(dir $(LINKLIBS)))
+  PASS1_LIBPATHS	= $(addprefix -L$(TOPDIR)/,$(dir $(PASS1_LINKLIBS)))
   PASS1_LDSCRIPT	= -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/locked/ld-locked.inc
 endif
 
 PASS1_LDFLAGS	= -r $(PASS1_LDSCRIPT)
-PASS1_LDLIBS	= $(patsubst lib%,-l%,$(basename $(notdir $(LINKLIBS))))
+PASS1_LDLIBS	= $(patsubst lib%,-l%,$(basename $(notdir $(PASS1_LINKLIBS))))
 PASS1_LIBGCC	= "${shell $(CC) -print-libgcc-file-name}"
 
 all: locked.r
 
+# Create include-able linker script that specifies all of the symbols to be
+# resolved in the locked.r file.
+
 ld-locked.inc: mklocked.sh $(TOPDIR)/.config
 	@echo "MK:  ld-locked.inc"
 	@./mklocked.sh "$(TOPDIR)"
 
-locked.r: ld-locked.inc $(OBJS)
+# Create the locked.r file containing all of the code (except the start-up code)
+# that needs to lie in the locked text region.
+
+locked.r: ld-locked.inc
 	@echo "LD:  locked.r"
-	@$(LD) -o $@ $(PASS1_LDFLAGS) $(PASS1_LIBPATHS) --start-group $(PASS1_LDLIBS) --end-group -u os_start $(PASS1_LIBGCC) 
+	@$(LD) -o $@ $(PASS1_LDFLAGS) $(PASS1_LIBPATHS) --start-group $(PASS1_LDLIBS) --end-group $(PASS1_LIBGCC) 
+	@echo "NM:  locked.map"
+	@$(NM) $@ > locked.map
+	@fgrep " U " locked.map | grep -v os_start
+	@echo "SZ:"
+	@$(CROSSDEV)size $@
 
 .depend:
 
 depend: .depend
 
 clean:
-	@rm -f locked.r *~ .*.swp
+	@rm -f locked.r locked.map *~ .*.swp
 
 distclean: clean
 	@rm -f ld-locked.inc
diff --git a/nuttx/configs/ea3131/locked/mklocked.sh b/nuttx/configs/ea3131/locked/mklocked.sh
index 8bfd03da3..b15ce6321 100755
--- a/nuttx/configs/ea3131/locked/mklocked.sh
+++ b/nuttx/configs/ea3131/locked/mklocked.sh
@@ -117,13 +117,9 @@ fi
 # Idle Loop
 ############################################################################
 #
-# The IDLE loop must be forced to lie in the locked .text region. NOTE that
-# most of the IDLE loop is is os_start.c, but we don't we want to handle
-# that differently so that it does not draw in a lot of things that we do
-# not need in the locked region.  However, we do need to bring in all of
-# the things called by os_start up to the point where the page fill worker
-# thread is started.
+# The IDLE loop must be forced to lie in the locked .text region.
 
+echo "EXTERN(os_start)" >>ld-locked.inc
 echo "EXTERN(up_idle)" >>ld-locked.inc
 
 ############################################################################
@@ -133,4 +129,3 @@ echo "EXTERN(up_idle)" >>ld-locked.inc
 # All of the page fill worker thread must be in the locked .text region.
 
 echo "EXTERN(pg_worker)" >>ld-locked.inc
-
-- 
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