From: Jim Cromie via B4 Relay <devnull+jim.cromie.gmail.com@kernel.org>
To: Jason Baron <jbaron@akamai.com>, Shuah Khan <shuah@kernel.org>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>,
Simona Vetter <simona@ffwll.ch>, Arnd Bergmann <arnd@arndb.de>,
Luis Chamberlain <mcgrof@kernel.org>,
Petr Pavlu <petr.pavlu@suse.com>,
Daniel Gomez <da.gomez@kernel.org>,
Sami Tolvanen <samitolvanen@google.com>,
Aaron Tomlin <atomlin@atomlin.com>,
Andrew Morton <akpm@linux-foundation.org>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Nathan Chancellor <nathan@kernel.org>,
Nicolas Schier <nsc@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-arch@vger.kernel.org,
linux-modules@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kbuild@vger.kernel.org, Jim Cromie <jim.cromie@gmail.com>
Subject: [PATCH v8 05/43] vmlinux.lds.h: refactor BOUNDED_SECTION_* macros into bounded_sections.lds.h
Date: Sat, 05 Sep 2026 12:13:19 -0600 [thread overview]
Message-ID: <20260905-dd-cmap-part2-clean-v8-5-a4cc0674f6fd@gmail.com> (raw)
In-Reply-To: <20260905-dd-cmap-part2-clean-v8-0-a4cc0674f6fd@gmail.com>
From: Jim Cromie <jim.cromie@gmail.com>
Move BOUNDED_SECTION_* macros to a new helper file:
include/asm-generic/bounded_sections.lds.h and include it back into
vmlinux.lds.h. This allows its reuse later to fix a failure to keep
dyndbg sections in some circumstances.
NOTES:
These macros are only for use in vmlinux.lds.h, where the _start &
_end symbols are needed. Modules keep sections separate in ELF
sections, with their boundaries known, so the _start and _end are not
useful, and may confuse tools not expecting them.
This patch ignores a checkpatch warning, because new file is covered
by "GENERIC INCLUDE/ASM HEADER FILES" in MAINTAINERS
CC: Arnd Bergmann <arnd@arndb.de>
CC: linux-arch@vger.kernel.org
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
---
v3: move include to top
---
include/asm-generic/bounded_sections.lds.h | 36 ++++++++++++++++++++++++++++++
include/asm-generic/vmlinux.lds.h | 31 +------------------------
2 files changed, 37 insertions(+), 30 deletions(-)
diff --git a/include/asm-generic/bounded_sections.lds.h b/include/asm-generic/bounded_sections.lds.h
new file mode 100644
index 000000000000..8c29293ca7fb
--- /dev/null
+++ b/include/asm-generic/bounded_sections.lds.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef _ASM_GENERIC_BOUNDED_SECTIONS_H
+#define _ASM_GENERIC_BOUNDED_SECTIONS_H
+
+#define BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_) \
+ _BEGIN_##_label_ = .; \
+ KEEP(*(_sec_)) \
+ _END_##_label_ = .;
+
+#define BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_) \
+ _label_##_BEGIN_ = .; \
+ KEEP(*(_sec_)) \
+ _label_##_END_ = .;
+
+#define BOUNDED_SECTION_BY(_sec_, _label_) \
+ BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop)
+
+#define BOUNDED_SECTION(_sec) BOUNDED_SECTION_BY(_sec, _sec)
+
+#define HEADERED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \
+ _HDR_##_label_ = .; \
+ KEEP(*(.gnu.linkonce.##_sec_)) \
+ BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_)
+
+#define HEADERED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \
+ _label_##_HDR_ = .; \
+ KEEP(*(.gnu.linkonce.##_sec_)) \
+ BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_)
+
+#define HEADERED_SECTION_BY(_sec_, _label_) \
+ HEADERED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop)
+
+#define HEADERED_SECTION(_sec) HEADERED_SECTION_BY(_sec, _sec)
+
+#endif /* _ASM_GENERIC_BOUNDED_SECTIONS_H */
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index b2988aa12f66..b4ece391f7b1 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -50,6 +50,7 @@
* [__nosave_begin, __nosave_end] for the nosave data
*/
+#include <asm-generic/bounded_sections.lds.h>
#include <asm-generic/codetag.lds.h>
#ifndef LOAD_OFFSET
@@ -211,36 +212,6 @@
# endif
#endif
-#define BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_) \
- _BEGIN_##_label_ = .; \
- KEEP(*(_sec_)) \
- _END_##_label_ = .;
-
-#define BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_) \
- _label_##_BEGIN_ = .; \
- KEEP(*(_sec_)) \
- _label_##_END_ = .;
-
-#define BOUNDED_SECTION_BY(_sec_, _label_) \
- BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop)
-
-#define BOUNDED_SECTION(_sec) BOUNDED_SECTION_BY(_sec, _sec)
-
-#define HEADERED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \
- _HDR_##_label_ = .; \
- KEEP(*(.gnu.linkonce.##_sec_)) \
- BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_)
-
-#define HEADERED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \
- _label_##_HDR_ = .; \
- KEEP(*(.gnu.linkonce.##_sec_)) \
- BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_)
-
-#define HEADERED_SECTION_BY(_sec_, _label_) \
- HEADERED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop)
-
-#define HEADERED_SECTION(_sec) HEADERED_SECTION_BY(_sec, _sec)
-
#ifdef CONFIG_TRACE_BRANCH_PROFILING
#define LIKELY_PROFILE() \
BOUNDED_SECTION_BY(_ftrace_annotated_branch, _annotated_branch_profile)
--
2.55.0
next prev parent reply other threads:[~2026-09-05 18:13 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-05 18:13 [PATCH v8 00/43] dyndbg: fix classmaps API for DRM, query extensions, and selftests Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 01/43] selftests/dyndbg: Add kselftest script to verify dynamic-debug Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 02/43] drm: Fix incorrect ccflags-y spelling inside Makefile Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 03/43] drm: fix config dependent unused variable warning Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 04/43] drm: Mark CONFIG_DRM_USE_DYNAMIC_DEBUG as unBROKEN Jim Cromie via B4 Relay
2026-09-05 18:13 ` Jim Cromie via B4 Relay [this message]
2026-09-05 18:13 ` [PATCH v8 06/43] vmlinux.lds.h: drop unused HEADERED_SECTION* macros Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 07/43] vmlinux.lds.h: Fix ALIGN(8) omission causing NULL ptr on i386 Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 08/43] vmlinux.lds.h: remove redundant ALIGN(8) directives Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 09/43] dyndbg.lds.S: fix lost dyndbg sections in modules Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 10/43] dyndbg: factor ddebug_match_desc out from ddebug_change Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 11/43] dyndbg: add stub macro for DECLARE_DYNDBG_CLASSMAP Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 12/43] dyndbg: reword "class unknown," to "class:_UNKNOWN_" Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 13/43] dyndbg-API: remove DD_CLASS_TYPE_(DISJOINT|LEVEL)_NAMES and code Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 14/43] dyndbg: drop NUM_TYPE_ARGS Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 15/43] dyndbg: bump num-tokens in a query-cmd from 9 to 15 Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 16/43] dyndbg: reduce verbose/debug clutter Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 17/43] lib/parser: add match_wildcard_hyphen() for agnostic matching Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 18/43] kbuild, dyndbg: clean up builtin module-name ambiguities Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 19/43] dyndbg: refactor param_set_dyndbg_classes and below Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 20/43] dyndbg: tighten fn-sig of ddebug_apply_class_bitmap Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 21/43] dyndbg: replace classmap list with an array-slice Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 22/43] dyndbg: macrofy a 2-index for-loop pattern Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 23/43] dyndbg: reduce class param storage to u32 Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 24/43] dyndbg,module: make proper substructs in _ddebug_info Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 25/43] dyndbg: move mod_name down from struct ddebug_table to _ddebug_info Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 26/43] dyndbg: hoist classmap-filter-by-modname up to ddebug_add_module Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 27/43] dyndbg-API: replace DECLARE_DYNDBG_CLASSMAP Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 28/43] selftests/dyndbg: enable FT_classmap_inheritance Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 29/43] dyndbg: detect class_id reservation conflicts Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 30/43] dyndbg: check DYNAMIC_DEBUG_CLASSMAP_{DEFINE,USE_} args at compile-time Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 31/43] dyndbg-test: add do_bulk testpoint, rename do_prints to do_classes Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 32/43] dyndbg-API: promote DYNAMIC_DEBUG_CLASSMAP_PARAM to API Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 33/43] dyndbg: control-parser: treat comma as a token separator Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 34/43] selftests: enable comma-terminator tests Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 35/43] dyndbg: split multi-query strings with @ Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 36/43] dyndbg: resolve "protection" of class'd pr_debug Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 37/43] dyndbg: harden classmap and descriptor validation Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 38/43] docs/dyndbg: add classmap info to howto Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 39/43] dyndbg: Ignore additional arguments from pr_fmt Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 40/43] dyndbg: add epilogue to dynamic_debug/control file Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 41/43] dyndbg: add +c flag to count advantage of classmaps for DRM Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 42/43] dyndbg: add DEBUG-biased fallback stubs for _dynamic_func_call_cls Jim Cromie via B4 Relay
2026-09-05 18:13 ` [PATCH v8 43/43] selftests/dynamic_debug: Prime params module with +p in FT_comma_terminators Jim Cromie via B4 Relay
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