From: Kris Van Hees <kris.van.hees@oracle.com>
To: linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org,
linux-modules@vger.kernel.org,
linux-trace-kernel@vger.kernel.org
Cc: Kris Van Hees <kris.van.hees@oracle.com>,
Nick Alcock <nick.alcock@oracle.com>,
Steven Rostedt <rostedt@goodmis.org>,
Luis Chamberlain <mcgrof@kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Jiri Olsa <olsajiri@gmail.com>
Subject: [PATCH 3/6] kbuild: generate a linker map for vmlinux.o
Date: Fri, 8 Dec 2023 00:07:49 -0500 [thread overview]
Message-ID: <20231208050752.2787575-4-kris.van.hees@oracle.com> (raw)
In-Reply-To: <20231208050752.2787575-1-kris.van.hees@oracle.com>
When CONFIG_BUILTIN_RANGES is set, a linker map for vmlinux.o needs to
be generated. The generation of offset range data for builtin modules
depends on that linker map to know what offsets in an ELF section belong
to an object file for a particular builtin module.
Signed-off-by: Kris Van Hees <kris.van.hees@oracle.com>
Reviewed-by: Nick Alcock <nick.alcock@oracle.com>
---
scripts/Makefile.vmlinux_o | 3 +++
1 file changed, 3 insertions(+)
diff --git a/scripts/Makefile.vmlinux_o b/scripts/Makefile.vmlinux_o
index bfb84efcef39..9e35cb0ed862 100644
--- a/scripts/Makefile.vmlinux_o
+++ b/scripts/Makefile.vmlinux_o
@@ -45,9 +45,12 @@ objtool-args = $(vmlinux-objtool-args-y) --link
# Link of vmlinux.o used for section mismatch analysis
# ---------------------------------------------------------------------------
+vmlinux-o-ld-args-$(CONFIG_BUILTIN_RANGES) += -Map=$@.map
+
quiet_cmd_ld_vmlinux.o = LD $@
cmd_ld_vmlinux.o = \
$(LD) ${KBUILD_LDFLAGS} -r -o $@ \
+ $(vmlinux-o-ld-args-y) \
$(addprefix -T , $(initcalls-lds)) \
--whole-archive vmlinux.a --no-whole-archive \
--start-group $(KBUILD_VMLINUX_LIBS) --end-group \
--
2.42.0
next prev parent reply other threads:[~2023-12-08 5:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-08 5:07 [PATCH 0/6] Generate address range data for built-in modules Kris Van Hees
2023-12-08 5:07 ` [PATCH 1/6] kbuild: add modules.builtin.objs Kris Van Hees
2023-12-08 5:07 ` [PATCH 2/6] module: add CONFIG_BUILTIN_RANGES option Kris Van Hees
2023-12-08 22:59 ` Masami Hiramatsu
2023-12-11 16:29 ` Kris Van Hees
2023-12-08 5:07 ` Kris Van Hees [this message]
2023-12-08 5:07 ` [PATCH 4/6] module: script to generate offset ranges for builtin modules Kris Van Hees
2023-12-08 5:07 ` [PATCH 5/6] kbuild: generate modules.builtin.ranges when linking the kernel Kris Van Hees
2023-12-08 5:07 ` [PATCH 6/6] module: add install target for modules.builtin.ranges Kris Van Hees
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