Re: [PATCH] kbuild: Add vmlinux_install to facilitate debugging

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On 2024/10/8 0:07, Zach Wade wrote:
When testing multiple versions of the kernel with the same source code,it
is often necessary to recompile the kernel, which is time-consuming for
small hosts. I need to cp vmlinux to the corresponding module directory.
I think adding this will make debugging the kernel a little more
convenient.

Signed-off-by: Zach Wade <zachwade.k@xxxxxxxxx>
---
  Makefile | 14 ++++++++++++++
  1 file changed, 14 insertions(+)

diff --git a/Makefile b/Makefile
index c5493c0c0ca1..1caab011599f 100644
--- a/Makefile
+++ b/Makefile
@@ -1579,6 +1579,7 @@ help:
  	@echo  '* vmlinux	  - Build the bare kernel'
  	@echo  '* modules	  - Build all modules'
  	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
+	@echo  '  vmlinux_install - Install vmlinux to INSTALL_MOD_PATH (default: /)'
  	@echo  '  vdso_install    - Install unstripped vdso to INSTALL_MOD_PATH (default: /)'
  	@echo  '  dir/            - Build all files in dir and below'
  	@echo  '  dir/file.[ois]  - Build specified target only'
@@ -1887,6 +1888,19 @@ modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \
  	 $(if $(KBUILD_MODULES), modules_check)
  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
+# ---------------------------------------------------------------------------
+# vmlinux install
+
+PHONY += vmlinux_install
+
+vmlinux_install:
+	@if [ -f vmlinux ]; then \
+		echo "INSTALL ${MODLIB}/vmlinux"; \
+		cp -f vmlinux ${MODLIB}/ ; \
+	else \
+		echo "vmlinux file does not exist."; \
+	fi
+
  # Single targets
  # ---------------------------------------------------------------------------
  # To build individual files in subdirectories, you can do like this:

Hi Masahiro Yamada,

I think this patch will make me feel comfortable, so I submitted this change. However, this submission may not be perfect. I just put forward my ideas. If you think it can be added, you are welcome to point out the parts that need to be modified. I will fix them as required and resubmit the v2 version.

Thanks,
Zach




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