tpm2-tools: refresh the dlopen patch for 3.0.4

The latest git version has updated to use dl interface to load
the library of tpm2-abrmd, instead of linking it on compilation.

Signed-off-by: Jia Zhang <zhang.jia@linux.alibaba.com>

meta-tpm2/recipes-tpm/tpm2-tools/tpm2-tools-3.0.4/0001-tpm2-tools-use-dynamic-linkage-with-tpm2-abrmd.patch

@@ -0,0 +1,77 @@
+From cb1b28d795dd120dcc8b75fff926b0abcda06535 Mon Sep 17 00:00:00 2001
+From: Jia Zhang <zhang.jia@linux.alibaba.com>
+Date: Fri, 16 Feb 2018 20:31:58 -0500
+Subject: [PATCH] tpm2-tools: use dynamic linkage with tpm2-abrmd
+
+tpm2-abrmd has huge dependencies and they are not necessary to be involved
+in initramfs.
+
+Signed-off-by: Jia Zhang <zhang.jia@linux.alibaba.com>
+---
+ Makefile.am                      |  2 +-
+ lib/tcti/tpm2_tools_tcti_abrmd.c | 21 +++++++++++++++++++--
+ 2 files changed, 20 insertions(+), 3 deletions(-)
+
+diff --git a/Makefile.am b/Makefile.am
+index 7ac86cd..1a8074a 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -48,7 +48,7 @@ AM_LDFLAGS   := $(EXTRA_LDFLAGS) $(CODE_COVERAGE_LIBS)
+ 
+ LDADD = \
+     $(LIB_COMMON) $(SAPI_LIBS) $(TCTI_SOCK_LIBS) $(TCTI_TABRMD_LIBS) \
+-    $(TCTI_DEV_LIBS) $(CRYPTO_LIBS)
++    $(TCTI_DEV_LIBS) $(CRYPTO_LIBS) -ldl
+ 
+ # keep me sorted
+ bin_PROGRAMS = \
+diff --git a/lib/tcti/tpm2_tools_tcti_abrmd.c b/lib/tcti/tpm2_tools_tcti_abrmd.c
+index 5e50288..48e0df6 100644
+--- a/lib/tcti/tpm2_tools_tcti_abrmd.c
++++ b/lib/tcti/tpm2_tools_tcti_abrmd.c
+@@ -30,6 +30,7 @@
+ //**********************************************************************;
+ #include <inttypes.h>
+ #include <stdlib.h>
++#include <dlfcn.h>
+ #include <tcti/tcti-tabrmd.h>
+ 
+ #include <sapi/tpm20.h>
+@@ -42,8 +43,24 @@ TSS2_TCTI_CONTEXT *tpm2_tools_tcti_abrmd_init(char *opts) {
+ 
+     UNUSED(opts);
+ 
++    /*
++     * Intend to "forget" the handle in order to make sure libtcti-tabrmd
++     * is unloaded along with the deconstructed functions.
++     */
++    void *tabrmd_handle;
++    tabrmd_handle = dlopen("libtcti-tabrmd.so.0", RTLD_LAZY);
++    if (!tabrmd_handle) {
++       LOG_ERR ("Unable to find out the tabrmd tcti library");
++       return NULL;
++    }
++
++    TSS2_RC (*init)(TSS2_TCTI_CONTEXT *, size_t *);
++    init = dlsym(tabrmd_handle, "tss2_tcti_tabrmd_init");
++    if (!init)
++        return NULL;
++
+     size_t size;
+-    TSS2_RC rc = tss2_tcti_tabrmd_init(NULL, &size);
++    TSS2_RC rc = init(NULL, &size);
+     if (rc != TSS2_RC_SUCCESS) {
+         LOG_ERR("Failed to get size for TABRMD TCTI context: 0x%" PRIx32, rc);
+         return NULL;
+@@ -55,7 +72,7 @@ TSS2_TCTI_CONTEXT *tpm2_tools_tcti_abrmd_init(char *opts) {
+         return NULL;
+     }
+ 
+-    rc = tss2_tcti_tabrmd_init(tcti_ctx, &size);
++    rc = init(tcti_ctx, &size);
+     if (rc != TSS2_RC_SUCCESS) {
+         LOG_ERR ("Failed to initialize TABRMD TCTI context: 0x%" PRIx32, rc);
+         free(tcti_ctx);
+-- 
+1.8.3.1
+

meta-tpm2/recipes-tpm/tpm2-tools/tpm2-tools_3.0.4.bb

@@ -1,6 +1,9 @@
 include ${BPN}.inc
 
-SRC_URI = "https://github.com/tpm2-software/${BPN}/releases/download/${PV}/${BPN}-${PV}.tar.gz"
+SRC_URI = "\
+    https://github.com/tpm2-software/${BPN}/releases/download/${PV}/${BPN}-${PV}.tar.gz \
+    file://0001-tpm2-tools-use-dynamic-linkage-with-tpm2-abrmd.patch \
+"
 SRC_URI[md5sum] = "f7a962c6e3d2997efe8949ac7aec8283"
 SRC_URI[sha256sum] = "ac05028347a9fa1da79b5d53b998193de0c3a76000badb961c3feb8b8a0e8e8e"