From f6639c18330bc849d5183c5ee6a19ff0799d3791 Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Sun, 26 Jul 2015 12:59:18 +0300
Subject: [PATCH] Add libunwind.

---
 .gitmodules                          |  3 +++
 software/libunwind/Makefile          | 30 ++++++++++++++++++++++++++++
 software/libunwind/__cxxabi_config.h |  0
 software/libunwind/strings.h         |  2 ++
 software/unwinder                    |  1 +
 5 files changed, 36 insertions(+)
 create mode 100644 software/libunwind/Makefile
 create mode 100644 software/libunwind/__cxxabi_config.h
 create mode 100644 software/libunwind/strings.h
 create mode 160000 software/unwinder

diff --git a/.gitmodules b/.gitmodules
index 50d3533ab..38ff0db82 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "extcores/litepcie_phy_wrappers"]
 	path = extcores/litepcie_phy_wrappers
 	url = https://github.com/enjoy-digital/litepcie_phy_wrappers
+[submodule "software/unwinder"]
+	path = software/unwinder
+	url = https://github.com/whitequark/libunwind
diff --git a/software/libunwind/Makefile b/software/libunwind/Makefile
new file mode 100644
index 000000000..f250db79d
--- /dev/null
+++ b/software/libunwind/Makefile
@@ -0,0 +1,30 @@
+MSCDIR=../..
+include $(MSCDIR)/software/common.mak
+
+COMMONFLAGS+=-integrated-as \
+	-I. -I$(MSCDIR)/software/include/dyld/ -I$(MSCDIR)/software/unwinder/include/ \
+	-D__ELF__ -D__linux__
+
+OBJECTS=UnwindRegistersSave.o UnwindRegistersRestore.o UnwindLevel1.o libunwind.o
+
+all: libunwind.a
+
+# pull in dependency info for *existing* .o files
+-include $(OBJECTS:.o=.d)
+
+libunwind.a: $(OBJECTS)
+	$(AR) crs libunwind.a $(OBJECTS)
+
+%.o: $(MSCDIR)/software/unwinder/src/%.cpp
+	$(compilexx-dep)
+
+%.o: $(MSCDIR)/software/unwinder/src/%.c
+	$(compile-dep)
+
+%.o: $(MSCDIR)/software/unwinder/src/%.S
+	$(assemble)
+
+.PHONY: clean
+
+clean:
+	$(RM) $(OBJECTS) $(OBJECTS:.o=.ts) $(OBJECTS:.o=.d) libuwind.a .*~ *~
diff --git a/software/libunwind/__cxxabi_config.h b/software/libunwind/__cxxabi_config.h
new file mode 100644
index 000000000..e69de29bb
diff --git a/software/libunwind/strings.h b/software/libunwind/strings.h
new file mode 100644
index 000000000..18f596f63
--- /dev/null
+++ b/software/libunwind/strings.h
@@ -0,0 +1,2 @@
+// This is some obsolete BSD crap that libunwind pulls in
+// that's so old and useless it's not worth putting into libbase.
diff --git a/software/unwinder b/software/unwinder
new file mode 160000
index 000000000..7ce966d59
--- /dev/null
+++ b/software/unwinder
@@ -0,0 +1 @@
+Subproject commit 7ce966d59aa6c5a8b962dca43a34279b69bec597