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authorDaniel P. Berrange <berrange@redhat.com>2015-09-02 10:57:27 +0100
committerDaniel P. Berrange <berrange@redhat.com>2015-09-15 14:18:18 +0100
commitfb37726db77b21f3731b90693d2c93ade1777528 (patch)
tree03e6990ab7b59cd867f3a27925246107ffe9600a
parentb124533e069a6624316da2096d170b0bd9197d86 (diff)
downloadqemu-fb37726db77b21f3731b90693d2c93ade1777528.tar.gz
crypto: move crypto objects out of libqemuutil.la
Future patches will be adding more crypto related APIs which rely on QOM infrastructure. This creates a problem, because QOM relies on library constructors to register objects. When you have a file in a static .a library though which is only referenced by a constructor the linker is dumb and will drop that file when linking to the final executable :-( The only workaround for this is to link the .a library to the executable using the -Wl,--whole-archive flag, but this creates its own set of problems because QEMU is relying on lazy linking for libqemuutil.a. Using --whole-archive majorly increases the size of final executables as they now contain a bunch of object code they don't actually use. The least bad option is to thus not include the crypto objects in libqemuutil.la, and instead define a crypto-obj-y variable that is referenced directly by all the executables that need this code (tools + softmmu, but not qemu-ga). We avoid pulling entire of crypto-obj-y into the userspace emulators as that would force them to link to gnutls too, which is not required. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
-rw-r--r--Makefile9
-rw-r--r--Makefile.objs6
-rw-r--r--Makefile.target4
-rw-r--r--crypto/Makefile.objs13
-rw-r--r--tests/Makefile7
5 files changed, 27 insertions, 12 deletions
diff --git a/Makefile b/Makefile
index 9ce3972d84..9c08b11ca8 100644
--- a/Makefile
+++ b/Makefile
@@ -152,6 +152,8 @@ dummy := $(call unnest-vars,, \
qga-vss-dll-obj-y \
block-obj-y \
block-obj-m \
+ crypto-obj-y \
+ crypto-aes-obj-y \
common-obj-y \
common-obj-m)
@@ -173,6 +175,7 @@ SUBDIR_RULES=$(patsubst %,subdir-%, $(TARGET_DIRS))
SOFTMMU_SUBDIR_RULES=$(filter %-softmmu,$(SUBDIR_RULES))
$(SOFTMMU_SUBDIR_RULES): $(block-obj-y)
+$(SOFTMMU_SUBDIR_RULES): $(crypto-obj-y)
$(SOFTMMU_SUBDIR_RULES): config-all-devices.mak
subdir-%:
@@ -227,9 +230,9 @@ util/module.o-cflags = -D'CONFIG_BLOCK_MODULES=$(block-modules)'
qemu-img.o: qemu-img-cmds.h
-qemu-img$(EXESUF): qemu-img.o $(block-obj-y) libqemuutil.a libqemustub.a
-qemu-nbd$(EXESUF): qemu-nbd.o $(block-obj-y) libqemuutil.a libqemustub.a
-qemu-io$(EXESUF): qemu-io.o $(block-obj-y) libqemuutil.a libqemustub.a
+qemu-img$(EXESUF): qemu-img.o $(block-obj-y) $(crypto-obj-y) libqemuutil.a libqemustub.a
+qemu-nbd$(EXESUF): qemu-nbd.o $(block-obj-y) $(crypto-obj-y) libqemuutil.a libqemustub.a
+qemu-io$(EXESUF): qemu-io.o $(block-obj-y) $(crypto-obj-y) libqemuutil.a libqemustub.a
qemu-bridge-helper$(EXESUF): qemu-bridge-helper.o
diff --git a/Makefile.objs b/Makefile.objs
index f094eff15e..655c1f0aba 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -2,7 +2,6 @@
# Common libraries for tools and emulators
stub-obj-y = stubs/
util-obj-y = util/ qobject/ qapi/ qapi-types.o qapi-visit.o qapi-event.o
-util-obj-y += crypto/
#######################################################################
# block-obj-y is code used by both qemu system emulation and qemu-img
@@ -21,6 +20,11 @@ block-obj-y += coroutine-$(CONFIG_COROUTINE_BACKEND).o
block-obj-m = block/
+#######################################################################
+# crypto-obj-y is code used by both qemu system emulation and qemu-img
+
+crypto-obj-y = crypto/
+crypto-aes-obj-y = crypto/
######################################################################
# smartcard
diff --git a/Makefile.target b/Makefile.target
index dc322942f4..3d97966e75 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -170,12 +170,16 @@ target-obj-y-save := $(target-obj-y)
dummy := $(call unnest-vars,.., \
block-obj-y \
block-obj-m \
+ crypto-obj-y \
+ crypto-aes-obj-y \
common-obj-y \
common-obj-m)
target-obj-y := $(target-obj-y-save)
all-obj-y += $(common-obj-y)
all-obj-y += $(target-obj-y)
all-obj-$(CONFIG_SOFTMMU) += $(block-obj-y)
+all-obj-$(CONFIG_USER_ONLY) += $(crypto-aes-obj-y)
+all-obj-$(CONFIG_SOFTMMU) += $(crypto-obj-y)
$(QEMU_PROG_BUILD): config-devices.mak
diff --git a/crypto/Makefile.objs b/crypto/Makefile.objs
index b05013831b..2167fd2fdf 100644
--- a/crypto/Makefile.objs
+++ b/crypto/Makefile.objs
@@ -1,5 +1,8 @@
-util-obj-y += init.o
-util-obj-y += hash.o
-util-obj-y += aes.o
-util-obj-y += desrfb.o
-util-obj-y += cipher.o
+crypto-obj-y = init.o
+crypto-obj-y += hash.o
+crypto-obj-y += aes.o
+crypto-obj-y += desrfb.o
+crypto-obj-y += cipher.o
+
+# Let the userspace emulators avoid linking gnutls/etc
+crypto-aes-obj-y = aes.o
diff --git a/tests/Makefile b/tests/Makefile
index 0fcf148566..d77ccee3ab 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -290,7 +290,8 @@ test-qom-obj-y = qom/object.o qom/qom-qobject.o \
test-qapi-obj-y = tests/test-qapi-visit.o tests/test-qapi-types.o \
tests/test-qapi-event.o \
$(test-qom-obj-y)
-test-block-obj-y = $(block-obj-y) $(test-util-obj-y)
+test-crypto-obj-y = $(crypto-obj-y) $(test-util-obj-y)
+test-block-obj-y = $(block-obj-y) $(test-crypto-obj-y)
tests/check-qint$(EXESUF): tests/check-qint.o $(test-util-obj-y)
tests/check-qstring$(EXESUF): tests/check-qstring.o $(test-util-obj-y)
@@ -357,8 +358,8 @@ tests/test-opts-visitor$(EXESUF): tests/test-opts-visitor.o $(test-qapi-obj-y)
tests/test-mul64$(EXESUF): tests/test-mul64.o $(test-util-obj-y)
tests/test-bitops$(EXESUF): tests/test-bitops.o $(test-util-obj-y)
-tests/test-crypto-hash$(EXESUF): tests/test-crypto-hash.o $(test-util-obj-y)
-tests/test-crypto-cipher$(EXESUF): tests/test-crypto-cipher.o $(test-util-obj-y)
+tests/test-crypto-hash$(EXESUF): tests/test-crypto-hash.o $(test-crypto-obj-y)
+tests/test-crypto-cipher$(EXESUF): tests/test-crypto-cipher.o $(test-crypto-obj-y)
libqos-obj-y = tests/libqos/pci.o tests/libqos/fw_cfg.o tests/libqos/malloc.o
libqos-obj-y += tests/libqos/i2c.o tests/libqos/libqos.o