From: Siddharth Nayyar <sidnayyar@google.com>
To: petr.pavlu@suse.com
Cc: arnd@arndb.de, linux-arch@vger.kernel.org,
linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-modules@vger.kernel.org, mcgrof@kernel.org,
nathan@kernel.org, nicolas.schier@linux.dev,
samitolvanen@google.com, sidnayyar@google.com,
maennich@google.com, gprocida@google.com
Subject: [PATCH v2 02/10] linker: add kflagstab section to vmlinux and modules
Date: Mon, 13 Oct 2025 15:39:10 +0000 [thread overview]
Message-ID: <20251013153918.2206045-3-sidnayyar@google.com> (raw)
In-Reply-To: <20251013153918.2206045-1-sidnayyar@google.com>
This section will contain read-only kernel symbol flag values in the
form of a 8-bit bitset.
Signed-off-by: Siddharth Nayyar <sidnayyar@google.com>
Reviewed-by: Petr Pavlu <petr.pavlu@suse.com>
---
include/asm-generic/vmlinux.lds.h | 7 +++++++
scripts/module.lds.S | 1 +
2 files changed, 8 insertions(+)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index ae2d2359b79e..310e2de56211 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -518,6 +518,13 @@ defined(CONFIG_AUTOFDO_CLANG) || defined(CONFIG_PROPELLER_CLANG)
__stop___kcrctab_gpl = .; \
} \
\
+ /* Kernel symbol flags table */ \
+ __kflagstab : AT(ADDR(__kflagstab) - LOAD_OFFSET) { \
+ __start___kflagstab = .; \
+ KEEP(*(SORT(___kflagstab+*))) \
+ __stop___kflagstab = .; \
+ } \
+ \
/* Kernel symbol table: strings */ \
__ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
*(__ksymtab_strings) \
diff --git a/scripts/module.lds.S b/scripts/module.lds.S
index ee79c41059f3..9a8a3b6d1569 100644
--- a/scripts/module.lds.S
+++ b/scripts/module.lds.S
@@ -23,6 +23,7 @@ SECTIONS {
__ksymtab_gpl 0 : ALIGN(8) { *(SORT(___ksymtab_gpl+*)) }
__kcrctab 0 : ALIGN(4) { *(SORT(___kcrctab+*)) }
__kcrctab_gpl 0 : ALIGN(4) { *(SORT(___kcrctab_gpl+*)) }
+ __kflagstab 0 : ALIGN(1) { *(SORT(___kflagstab+*)) }
.ctors 0 : ALIGN(8) { *(SORT(.ctors.*)) *(.ctors) }
.init_array 0 : ALIGN(8) { *(SORT(.init_array.*)) *(.init_array) }
--
2.51.0.740.g6adb054d12-goog
next prev parent reply other threads:[~2025-10-13 15:39 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-13 15:39 [PATCH v2 00/10] scalable symbol flags with __kflagstab Siddharth Nayyar
2025-10-13 15:39 ` [PATCH v2 01/10] define kernel symbol flags Siddharth Nayyar
2025-10-13 15:39 ` Siddharth Nayyar [this message]
2025-10-13 15:39 ` [PATCH v2 03/10] modpost: create entries for kflagstab Siddharth Nayyar
2025-10-13 15:39 ` [PATCH v2 04/10] module loader: use kflagstab instead of *_gpl sections Siddharth Nayyar
2025-10-13 15:39 ` [PATCH v2 05/10] modpost: put all exported symbols in ksymtab section Siddharth Nayyar
2025-10-13 15:39 ` [PATCH v2 06/10] module loader: remove references of *_gpl sections Siddharth Nayyar
2025-10-13 15:39 ` [PATCH v2 07/10] linker: remove *_gpl sections from vmlinux and modules Siddharth Nayyar
2025-10-13 15:39 ` [PATCH v2 08/10] remove references to *_gpl sections in documentation Siddharth Nayyar
2025-10-13 15:39 ` [PATCH v2 09/10] modpost: add symbol import protection flag to kflagstab Siddharth Nayyar
2025-10-13 15:39 ` [PATCH v2 10/10] module loader: enforce symbol import protection Siddharth Nayyar
2025-10-14 7:34 ` kernel test robot
2025-10-20 23:00 ` Siddharth Nayyar
2025-10-23 2:36 ` kernel test robot
2025-10-23 9:58 ` kernel test robot
2025-10-13 19:02 ` [PATCH v2 00/10] scalable symbol flags with __kflagstab Jonathan Corbet
2025-10-20 22:43 ` Siddharth Nayyar
2025-10-21 8:35 ` Petr Pavlu
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