{"id":2771,"url":"https://patchwork.libcamera.org/api/patches/2771/?format=json","web_url":"https://patchwork.libcamera.org/patch/2771/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20200205130420.8736-2-kieran.bingham@ideasonboard.com>","date":"2020-02-05T13:04:16","name":"[libcamera-devel,1/5] libcamera: utils: Provide helper to get dynamic library runpath","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"ac4bb4cdcb66e5926a162ae5a7ad7d2a400a46aa","submitter":{"id":4,"url":"https://patchwork.libcamera.org/api/people/4/?format=json","name":"Kieran Bingham","email":"kieran.bingham@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/2771/mbox/","series":[{"id":661,"url":"https://patchwork.libcamera.org/api/series/661/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=661","date":"2020-02-05T13:04:15","name":"Support loading IPAs from the build tree","version":1,"mbox":"https://patchwork.libcamera.org/series/661/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/2771/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/2771/checks/","tags":{},"headers":{"Return-Path":"","Received":["from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 03C8760444\n\tfor ;\n\tWed, 5 Feb 2020 14:04:26 +0100 (CET)","from localhost.localdomain\n\t(cpc89242-aztw30-2-0-cust488.18-1.cable.virginm.net [86.31.129.233])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 9507352F;\n\tWed, 5 Feb 2020 14:04:25 +0100 (CET)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1580907865;\n\tbh=t9cqojs86Tp/WE1nUKpMnhO2V9ifQ5SLP+hE2LbOlfU=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=gy7dV5aPaxu6M6pwlewS4gAGaN4yy+mzKZb7KtnholQHqhoNWe4RdpaN5GBRqPXMj\n\tlJxgQBoLAUuLOSyXrLDLoUXw/JkJsK2gZMtbIGfwbInRJh4xHZUKaTco/B/+/7xqGC\n\tBpOUcq4guWm4mpmy/yntlMp3dI/R1qnVeiz31fFM=","From":"Kieran Bingham ","To":"LibCamera Devel ","Date":"Wed, 5 Feb 2020 13:04:16 +0000","Message-Id":"<20200205130420.8736-2-kieran.bingham@ideasonboard.com>","X-Mailer":"git-send-email 2.20.1","In-Reply-To":"<20200205130420.8736-1-kieran.bingham@ideasonboard.com>","References":"<20200205130420.8736-1-kieran.bingham@ideasonboard.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH 1/5] libcamera: utils: Provide helper to\n\tget dynamic library runpath","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","X-List-Received-Date":"Wed, 05 Feb 2020 13:04:26 -0000"},"content":"Provide a helper that will identify the DT_RUNPATH string from the\nELF dynamic library string table entries.\n\nSigned-off-by: Kieran Bingham \n---\n src/libcamera/include/utils.h | 1 +\n src/libcamera/utils.cpp | 26 ++++++++++++++++++++++++++\n 2 files changed, 27 insertions(+)","diff":"diff --git a/src/libcamera/include/utils.h b/src/libcamera/include/utils.h\nindex e467eb21c518..069b327bb436 100644\n--- a/src/libcamera/include/utils.h\n+++ b/src/libcamera/include/utils.h\n@@ -33,6 +33,7 @@ namespace utils {\n const char *basename(const char *path);\n \n char *secure_getenv(const char *name);\n+const char *get_runpath();\n \n template\n unsigned int set_overlap(InputIt1 first1, InputIt1 last1,\ndiff --git a/src/libcamera/utils.cpp b/src/libcamera/utils.cpp\nindex 4beffdab5eb6..e48cf2b6a48e 100644\n--- a/src/libcamera/utils.cpp\n+++ b/src/libcamera/utils.cpp\n@@ -7,7 +7,9 @@\n \n #include \"utils.h\"\n \n+#include \n #include \n+#include \n #include \n #include \n #include \n@@ -70,6 +72,30 @@ char *secure_getenv(const char *name)\n #endif\n }\n \n+/**\n+ * \\brief Obtain the runpath string from the dynamic symbol table\n+ * \\returns a const char pointer to the runpath entry in the elf string table\n+ * or NULL if it is not found.\n+ */\n+const char *get_runpath()\n+{\n+\tconst ElfW(Dyn) *dyn = _DYNAMIC;\n+\tconst ElfW(Dyn) *runpath = NULL;\n+\tconst char *strtab = NULL;\n+\n+\tfor (; dyn->d_tag != DT_NULL; ++dyn) {\n+\t\tif (dyn->d_tag == DT_STRTAB)\n+\t\t\tstrtab = reinterpret_cast(dyn->d_un.d_val);\n+\t\telse if (dyn->d_tag == DT_RUNPATH)\n+\t\t\trunpath = dyn;\n+\t}\n+\n+\tif (strtab && runpath)\n+\t\treturn strtab + runpath->d_un.d_val;\n+\n+\treturn NULL;\n+}\n+\n /**\n * \\fn libcamera::utils::set_overlap(InputIt1 first1, InputIt1 last1,\n *\t\t\t\t InputIt2 first2, InputIt2 last2)\n","prefixes":["libcamera-devel","1/5"]}