From: Kees Cook <keescook@chromium.org>
To: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>,
Peter Zijlstra <peterz@infradead.org>,
linux-arch@vger.kernel.org, Jessica Yu <jeyu@kernel.org>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Alexander Egorenkov <egorenar@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Ilya Leoshkevich <iii@linux.ibm.com>,
"Steven Rostedt (VMware)" <rostedt@goodmis.org>,
Ingo Molnar <mingo@kernel.org>,
Sami Tolvanen <samitolvanen@google.com>,
linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org,
linux-hardening@vger.kernel.org
Subject: [PATCH 2/4] vmlinux.lds.h: Split .static_call_sites from .static_call_tramp_key
Date: Wed, 1 Sep 2021 16:37:55 -0700 [thread overview]
Message-ID: <20210901233757.2571878-3-keescook@chromium.org> (raw)
In-Reply-To: <20210901233757.2571878-1-keescook@chromium.org>
These two sections are ro_after_init and .rodata respectively. While
they will ultimately become read-only, there's no reason to confuse
their macro names.
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: linux-arch@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
include/asm-generic/vmlinux.lds.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 70c74fdf9c9b..4781a8154254 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -396,17 +396,22 @@
. = __start_init_task + THREAD_SIZE; \
__end_init_task = .;
+/* Sorted during __init. */
#define JUMP_TABLE_RO_AFTER_INIT_DATA \
. = ALIGN(8); \
__start___jump_table = .; \
KEEP(*(__jump_table)) \
__stop___jump_table = .;
+/* Sorted during __init. */
#define STATIC_CALL_RO_AFTER_INIT_DATA \
. = ALIGN(8); \
__start_static_call_sites = .; \
KEEP(*(.static_call_sites)) \
__stop_static_call_sites = .; \
+
+#define STATIC_CALL_RODATA \
+ . = ALIGN(8); \
__start_static_call_tramp_key = .; \
KEEP(*(.static_call_tramp_key)) \
__stop_static_call_tramp_key = .;
@@ -434,6 +439,7 @@
__start_rodata = .; \
*(.rodata) *(.rodata.*) \
SCHED_RODATA \
+ STATIC_CALL_RODATA \
RO_AFTER_INIT_DATA /* Read only after init */ \
. = ALIGN(8); \
__start___tracepoints_ptrs = .; \
--
2.30.2
next prev parent reply other threads:[~2021-09-01 23:38 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-01 23:37 [PATCH 0/4] Fix ro_after_init vs static_call Kees Cook
2021-09-01 23:37 ` [PATCH 1/4] vmlinux.lds.h: Use regular *RODATA and *RO_AFTER_INIT_DATA suffixes Kees Cook
2021-09-03 5:55 ` Josh Poimboeuf
2021-09-03 8:17 ` Heiko Carstens
2021-09-01 23:37 ` Kees Cook [this message]
2021-09-03 5:55 ` [PATCH 2/4] vmlinux.lds.h: Split .static_call_sites from .static_call_tramp_key Josh Poimboeuf
2021-09-01 23:37 ` [PATCH 3/4] module: Use a list of strings for ro_after_init sections Kees Cook
2021-09-03 6:49 ` Josh Poimboeuf
2021-09-03 16:38 ` Kees Cook
2021-09-04 4:09 ` Josh Poimboeuf
2021-09-04 14:40 ` Kees Cook
2021-09-01 23:37 ` [PATCH 4/4] module: Include .static_call_sites in module ro_after_init Kees Cook
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