[PATCH] libcap: fix nativesdk-libcap relocate failure

[PATCH] libcap: fix nativesdk-libcap relocate failure

[Hongxu Jia]

./lat-sdk-poky-intel-x86-64-1.0.sh -y -d sdk-3
...
Setting it up...ERROR: could not relocate
/buildarea/raid5/hjia/community/lat_github_090816/build-3/tmp/deploy/sdk/sdk-3/sysroots/x86_64-pokysdk-linux/usr/lib/libpsx.so.2.54, interp size = 93 and 134 is needed.
...

Since upstream libcap applied commit [ee3b25c Support simply executing
the built shared libraries.][1], it manually append interp section to shared
libraries.

Refer the implement of Yocto glibc[2], allocated a 4096 byte .interp section
for nativesdk

[1] https://git.kernel.org/pub/scm/linux/kernel/git/morgan/libcap.git/commit/?id=ee3b25c0a877fa74d1aec88f325ac45b09963c82
[2] meta/recipes-core/glibc/glibc/0005-nativesdk-glibc-Raise-the-size-of-arrays-containing-.patch

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
---
 ...-Raise-the-size-of-arrays-containing.patch | 36 +++++++++++++++++++
 meta/recipes-support/libcap/libcap_2.54.bb    |  3 ++
 2 files changed, 39 insertions(+)
 create mode 100644 meta/recipes-support/libcap/files/0001-nativesdk-libcap-Raise-the-size-of-arrays-containing.patch

diff --git a/meta/recipes-support/libcap/files/0001-nativesdk-libcap-Raise-the-size-of-arrays-containing.patch b/meta/recipes-support/libcap/files/0001-nativesdk-libcap-Raise-the-size-of-arrays-containing.patch
new file mode 100644
index 0000000000..c7bf1a8b8c
--- /dev/null
+++ b/meta/recipes-support/libcap/files/0001-nativesdk-libcap-Raise-the-size-of-arrays-containing.patch
@@ -0,0 +1,36 @@
+From 794cebc5732908636f22a1d9843fed3ae664899a Mon Sep 17 00:00:00 2001
+From: Hongxu Jia <hongxu.jia@windriver.com>
+Date: Thu, 14 Oct 2021 15:57:36 +0800
+Subject: [PATCH] nativesdk-libcap: Raise the size of arrays containing dl
+ paths
+
+This patch puts the dynamic loader path in the binaries, SYSTEM_DIRS strings
+and lengths as well as ld.so.cache path in the dynamic loader to specific
+sections in memory. The sections that contain paths have been allocated a 4096
+byte section, which is the maximum path length in linux. This will allow the
+relocating script to parse the ELF binary, detect the section and easily replace
+the strings in a certain path.
+
+Upstream-Status: Inappropriate [SDK specific]
+
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+ libcap/execable.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/libcap/execable.h b/libcap/execable.h
+index 0bcc5d4..6e2a080 100644
+--- a/libcap/execable.h
++++ b/libcap/execable.h
+@@ -23,7 +23,7 @@
+ #endif
+ #define __EXECABLE_H
+ 
+-const char __execable_dl_loader[] __attribute((section(".interp"))) =
++const char __execable_dl_loader[4096] __attribute((section(".interp"))) =
+     SHARED_LOADER ;
+ 
+ static void __execable_parse_args(int *argc_p, char ***argv_p)
+-- 
+2.27.0
+
diff --git a/meta/recipes-support/libcap/libcap_2.54.bb b/meta/recipes-support/libcap/libcap_2.54.bb
index 04362e7032..fe29f05483 100644
--- a/meta/recipes-support/libcap/libcap_2.54.bb
+++ b/meta/recipes-support/libcap/libcap_2.54.bb
@@ -13,6 +13,9 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/libs/security/linux-privs/${BPN}2/${BPN}-${
            file://0001-ensure-the-XATTR_NAME_CAPS-is-defined-when-it-is-use.patch \
            file://0002-tests-do-not-run-target-executables.patch \
            "
+SRC_URI:append:class-nativesdk = " \
+           file://0001-nativesdk-libcap-Raise-the-size-of-arrays-containing.patch \
+           "
 SRC_URI[sha256sum] = "5091b24247999fd7a5e62bd9ac8bc761cda29f9baa0d1a2ca6a46f13891b4f0f"
 
 UPSTREAM_CHECK_URI = "https://www.kernel.org/pub/linux/libs/security/linux-privs/${BPN}2/"
-- 
2.27.0