linux-kernel - [PATCH v3 4/9] livepatch: Add klp-convert annotation helpers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190410155058.9437-5-joe.lawrence@redhat.com>
Date:   Wed, 10 Apr 2019 11:50:53 -0400
From:   Joe Lawrence <joe.lawrence@...hat.com>
To:     linux-kernel@...r.kernel.org, live-patching@...r.kernel.org,
        linux-kbuild@...r.kernel.org
Cc:     Jessica Yu <jeyu@...nel.org>, Jiri Kosina <jikos@...nel.org>,
        Joao Moreira <jmoreira@...e.de>,
        Joe Lawrence <joe.lawrence@...hat.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michael Matz <matz@...e.de>, Miroslav Benes <mbenes@...e.cz>,
        Nicolai Stange <nstange@...e.de>,
        Petr Mladek <pmladek@...e.com>
Subject: [PATCH v3 4/9] livepatch: Add klp-convert annotation helpers

From: Josh Poimboeuf <jpoimboe@...hat.com>

Define macros KLP_MODULE_RELOC and KLP_SYMPOS in
include/linux/livepatch.h to improve user-friendliness of the
livepatch annotation process.

Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
Signed-off-by: Joao Moreira <jmoreira@...e.de>
Signed-off-by: Joe Lawrence <joe.lawrence@...hat.com>
---
 include/linux/livepatch.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/linux/livepatch.h b/include/linux/livepatch.h
index 16b48e8b29a2..947cfc2d1980 100644
--- a/include/linux/livepatch.h
+++ b/include/linux/livepatch.h
@@ -236,6 +236,18 @@ void *klp_shadow_get_or_alloc(void *obj, unsigned long id,
 void klp_shadow_free(void *obj, unsigned long id, klp_shadow_dtor_t dtor);
 void klp_shadow_free_all(unsigned long id, klp_shadow_dtor_t dtor);
 
+/* Used to annotate symbol relocations in livepatches */
+#define KLP_MODULE_RELOC(obj)						\
+	struct klp_module_reloc						\
+	__attribute__((__section__(".klp.module_relocs." #obj)))	\
+	__attribute__((aligned (4)))
+
+#define KLP_SYMPOS(symbol, pos)						\
+	{								\
+		.sym = &symbol,						\
+		.sympos = pos,						\
+	},
+
 #else /* !CONFIG_LIVEPATCH */
 
 static inline int klp_module_coming(struct module *mod) { return 0; }
-- 
2.20.1