mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2024-12-29 09:13:38 +00:00
Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild updates from Michal Marek.
Fixed up nontrivial merge conflict in Makefile as per Stephen Rothwell
and linux-next (and trivial arch/sparc/Makefile changes due to removed
sparc32 logic).
* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
mips: Fix KBUILD_CPPFLAGS definition
kbuild: fix ia64 link
kbuild: document KBUILD_LDS, KBUILD_VMLINUX_{INIT,MAIN} and LDFLAGS_vmlinux
kbuild: link of vmlinux moved to a script
kbuild: refactor final link of sparc32
kbuild: drop unused KBUILD_VMLINUX_OBJS from top-level Makefile
kbuild: Makefile: remove unnecessary check for m68knommu ARCH
This commit is contained in:
Linus Torvalds
commit
1347a2cebc
@ -50,6 +50,10 @@ LDFLAGS_MODULE
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--------------------------------------------------
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Additional options used for $(LD) when linking modules.
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LDFLAGS_vmlinux
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--------------------------------------------------
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Additional options passed to final link of vmlinux.
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KBUILD_VERBOSE
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--------------------------------------------------
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Set the kbuild verbosity. Can be assigned same values as "V=...".
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@ -214,3 +218,18 @@ KBUILD_BUILD_USER, KBUILD_BUILD_HOST
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These two variables allow to override the user@host string displayed during
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boot and in /proc/version. The default value is the output of the commands
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whoami and host, respectively.
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KBUILD_LDS
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--------------------------------------------------
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The linker script with full path. Assigned by the top-level Makefile.
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KBUILD_VMLINUX_INIT
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--------------------------------------------------
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All object files for the init (first) part of vmlinux.
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Files specified with KBUILD_VMLINUX_INIT are linked first.
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KBUILD_VMLINUX_MAIN
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--------------------------------------------------
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All object files for the main part of vmlinux.
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KBUILD_VMLINUX_INIT and KBUILD_VMLINUX_MAIN together specify
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all the object files used to link vmlinux.
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231
Makefile
231
Makefile
@ -231,10 +231,6 @@ endif
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# Where to locate arch specific headers
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hdr-arch := $(SRCARCH)
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ifeq ($(ARCH),m68knommu)
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hdr-arch := m68k
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endif
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KCONFIG_CONFIG ?= .config
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export KCONFIG_CONFIG
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@ -341,7 +337,6 @@ AWK = awk
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GENKSYMS = scripts/genksyms/genksyms
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INSTALLKERNEL := installkernel
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DEPMOD = /sbin/depmod
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KALLSYMS = scripts/kallsyms
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PERL = perl
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CHECK = sparse
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@ -739,197 +734,21 @@ libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
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libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
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libs-y := $(libs-y1) $(libs-y2)
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# Build vmlinux
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# ---------------------------------------------------------------------------
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# vmlinux is built from the objects selected by $(vmlinux-init) and
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# $(vmlinux-main). Most are built-in.o files from top-level directories
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# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
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# Ordering when linking is important, and $(vmlinux-init) must be first.
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#
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# vmlinux
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# ^
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# |
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# +-< $(vmlinux-init)
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# | +--< init/version.o + more
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# |
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# +--< $(vmlinux-main)
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# | +--< driver/built-in.o mm/built-in.o + more
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# |
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# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
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#
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# vmlinux version (uname -v) cannot be updated during normal
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# descending-into-subdirs phase since we do not yet know if we need to
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# update vmlinux.
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# Therefore this step is delayed until just before final link of vmlinux -
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# except in the kallsyms case where it is done just before adding the
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# symbols to the kernel.
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#
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# System.map is generated to document addresses of all kernel symbols
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# Externally visible symbols (used by link-vmlinux.sh)
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export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
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export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
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export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
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export LDFLAGS_vmlinux
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vmlinux-init := $(head-y) $(init-y)
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vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
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vmlinux-all := $(vmlinux-init) $(vmlinux-main)
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vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
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export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
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vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
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# Rule to link vmlinux - also used during CONFIG_KALLSYMS
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# May be overridden by arch/$(ARCH)/Makefile
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quiet_cmd_vmlinux__ ?= LD $@
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cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
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-T $(vmlinux-lds) $(vmlinux-init) \
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--start-group $(vmlinux-main) --end-group \
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$(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
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# Final link of vmlinux
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cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
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quiet_cmd_link-vmlinux = LINK $@
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# Generate new vmlinux version
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quiet_cmd_vmlinux_version = GEN .version
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cmd_vmlinux_version = set -e; \
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if [ ! -r .version ]; then \
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rm -f .version; \
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echo 1 >.version; \
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else \
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mv .version .old_version; \
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expr 0$$(cat .old_version) + 1 >.version; \
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fi; \
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$(MAKE) $(build)=init
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# Generate System.map
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quiet_cmd_sysmap = SYSMAP
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cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
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# Sort exception table at build time
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quiet_cmd_sortextable = SORTEX
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cmd_sortextable = $(objtree)/scripts/sortextable
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# Link of vmlinux
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# If CONFIG_KALLSYMS is set .version is already updated
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# Generate System.map and verify that the content is consistent
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# Use + in front of the vmlinux_version rule to silent warning with make -j2
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# First command is ':' to allow us to use + in front of the rule
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define rule_vmlinux__
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:
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$(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
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$(call cmd,vmlinux__)
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$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
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$(if $(CONFIG_BUILDTIME_EXTABLE_SORT), \
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$(Q)$(if $($(quiet)cmd_sortextable), \
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echo ' $($(quiet)cmd_sortextable) vmlinux' &&) \
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$(cmd_sortextable) vmlinux)
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$(Q)$(if $($(quiet)cmd_sysmap), \
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echo ' $($(quiet)cmd_sysmap) System.map' &&) \
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$(cmd_sysmap) $@ System.map; \
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if [ $$? -ne 0 ]; then \
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rm -f $@; \
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/bin/false; \
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fi;
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$(verify_kallsyms)
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endef
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ifdef CONFIG_KALLSYMS
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# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
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# It's a three stage process:
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# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
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# empty
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# Running kallsyms on that gives us .tmp_kallsyms1.o with
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# the right size - vmlinux version (uname -v) is updated during this step
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# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
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# but due to the added section, some addresses have shifted.
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# From here, we generate a correct .tmp_kallsyms2.o
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# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
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# o Verify that the System.map from vmlinux matches the map from
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# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
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# o If 'make KALLSYMS_EXTRA_PASS=1" was used, do an extra pass using
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# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
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# temporary bypass to allow the kernel to be built while the
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# maintainers work out what went wrong with kallsyms.
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last_kallsyms := 2
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ifdef KALLSYMS_EXTRA_PASS
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ifneq ($(KALLSYMS_EXTRA_PASS),0)
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last_kallsyms := 3
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endif
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endif
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kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
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define verify_kallsyms
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$(Q)$(if $($(quiet)cmd_sysmap), \
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echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
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$(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
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$(Q)cmp -s System.map .tmp_System.map || \
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(echo Inconsistent kallsyms data; \
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echo This is a bug - please report about it; \
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echo Try "make KALLSYMS_EXTRA_PASS=1" as a workaround; \
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rm .tmp_kallsyms* ; /bin/false )
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endef
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# Update vmlinux version before link
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# Use + in front of this rule to silent warning about make -j1
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# First command is ':' to allow us to use + in front of this rule
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cmd_ksym_ld = $(cmd_vmlinux__)
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define rule_ksym_ld
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:
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+$(call cmd,vmlinux_version)
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$(call cmd,vmlinux__)
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$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
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endef
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||||
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||||
# Generate .S file with all kernel symbols
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quiet_cmd_kallsyms = KSYM $@
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cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
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$(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
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.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
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$(call if_changed_dep,as_o_S)
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.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
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$(call cmd,kallsyms)
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|
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# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
|
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.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
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$(call if_changed_rule,ksym_ld)
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|
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.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
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$(call if_changed,vmlinux__)
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.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
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$(call if_changed,vmlinux__)
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|
||||
# Needs to visit scripts/ before $(KALLSYMS) can be used.
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$(KALLSYMS): scripts ;
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|
||||
# Generate some data for debugging strange kallsyms problems
|
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debug_kallsyms: .tmp_map$(last_kallsyms)
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|
||||
.tmp_map%: .tmp_vmlinux% FORCE
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($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
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||||
|
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.tmp_map3: .tmp_map2
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||||
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.tmp_map2: .tmp_map1
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||||
|
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endif # ifdef CONFIG_KALLSYMS
|
||||
|
||||
# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
|
||||
# relevant sections renamed as per the linker script.
|
||||
quiet_cmd_vmlinux-modpost = LD $@
|
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cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
|
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$(vmlinux-init) --start-group $(vmlinux-main) --end-group \
|
||||
$(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
|
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define rule_vmlinux-modpost
|
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:
|
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+$(call cmd,vmlinux-modpost)
|
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$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
|
||||
$(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
|
||||
endef
|
||||
|
||||
# vmlinux image - including updated kernel symbols
|
||||
vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
|
||||
# Include targets which we want to
|
||||
# execute if the rest of the kernel build went well.
|
||||
vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
|
||||
ifdef CONFIG_HEADERS_CHECK
|
||||
$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
|
||||
endif
|
||||
@ -939,22 +758,11 @@ endif
|
||||
ifdef CONFIG_BUILD_DOCSRC
|
||||
$(Q)$(MAKE) $(build)=Documentation
|
||||
endif
|
||||
$(call vmlinux-modpost)
|
||||
$(call if_changed_rule,vmlinux__)
|
||||
$(Q)rm -f .old_version
|
||||
|
||||
# build vmlinux.o first to catch section mismatch errors early
|
||||
ifdef CONFIG_KALLSYMS
|
||||
.tmp_vmlinux1: vmlinux.o
|
||||
endif
|
||||
|
||||
modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
|
||||
vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
|
||||
$(call if_changed_rule,vmlinux-modpost)
|
||||
+$(call if_changed,link-vmlinux)
|
||||
|
||||
# The actual objects are generated when descending,
|
||||
# make sure no implicit rule kicks in
|
||||
$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
|
||||
$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
|
||||
|
||||
# Handle descending into subdirectories listed in $(vmlinux-dirs)
|
||||
# Preset locale variables to speed up the build process. Limit locale
|
||||
@ -1181,8 +989,6 @@ endif # CONFIG_MODULES
|
||||
|
||||
# Directories & files removed with 'make clean'
|
||||
CLEAN_DIRS += $(MODVERDIR)
|
||||
CLEAN_FILES += vmlinux System.map \
|
||||
.tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
|
||||
|
||||
# Directories & files removed with 'make mrproper'
|
||||
MRPROPER_DIRS += include/config usr/include include/generated \
|
||||
@ -1428,6 +1234,7 @@ scripts: ;
|
||||
endif # KBUILD_EXTMOD
|
||||
|
||||
clean: $(clean-dirs)
|
||||
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
|
||||
$(call cmd,rmdirs)
|
||||
$(call cmd,rmfiles)
|
||||
@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
|
||||
@ -1568,14 +1375,6 @@ quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
|
||||
cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
|
||||
$(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
|
||||
|
||||
a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
|
||||
$(KBUILD_AFLAGS_KERNEL) \
|
||||
$(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
|
||||
$(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
|
||||
|
||||
quiet_cmd_as_o_S = AS $@
|
||||
cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
|
||||
|
||||
# read all saved command lines
|
||||
|
||||
targets := $(wildcard $(sort $(targets)))
|
||||
|
||||
@ -219,8 +219,8 @@ endif
|
||||
|
||||
KBUILD_AFLAGS += $(cflags-y)
|
||||
KBUILD_CFLAGS += $(cflags-y)
|
||||
KBUILD_CPPFLAGS += -D"VMLINUX_LOAD_ADDRESS=$(load-y)"
|
||||
KBUILD_CPPFLAGS += -D"DATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)"
|
||||
KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
|
||||
KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
|
||||
|
||||
LDFLAGS += -m $(ld-emul)
|
||||
|
||||
|
||||
@ -121,15 +121,8 @@ LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
|
||||
|
||||
LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
|
||||
|
||||
CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
|
||||
define cmd_vmlinux__
|
||||
$(CC) $(CFLAGS_vmlinux) -o $@ \
|
||||
-Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
|
||||
-Wl,--start-group $(vmlinux-main) -Wl,--end-group \
|
||||
-lutil \
|
||||
$(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \
|
||||
FORCE ,$^) ; rm -f linux
|
||||
endef
|
||||
# Used by link-vmlinux.sh which has special support for um link
|
||||
export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
|
||||
|
||||
# When cleaning we don't include .config, so we don't include
|
||||
# TT or skas makefiles and don't clean skas_ptregs.h.
|
||||
|
||||
221
scripts/link-vmlinux.sh
Normal file
221
scripts/link-vmlinux.sh
Normal file
@ -0,0 +1,221 @@
|
||||
#!/bin/sh
|
||||
#
|
||||
# link vmlinux
|
||||
#
|
||||
# vmlinux is linked from the objects selected by $(KBUILD_VMLINUX_INIT) and
|
||||
# $(KBUILD_VMLINUX_MAIN). Most are built-in.o files from top-level directories
|
||||
# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
|
||||
# Ordering when linking is important, and $(KBUILD_VMLINUX_INIT) must be first.
|
||||
#
|
||||
# vmlinux
|
||||
# ^
|
||||
# |
|
||||
# +-< $(KBUILD_VMLINUX_INIT)
|
||||
# | +--< init/version.o + more
|
||||
# |
|
||||
# +--< $(KBUILD_VMLINUX_MAIN)
|
||||
# | +--< drivers/built-in.o mm/built-in.o + more
|
||||
# |
|
||||
# +-< ${kallsymso} (see description in KALLSYMS section)
|
||||
#
|
||||
# vmlinux version (uname -v) cannot be updated during normal
|
||||
# descending-into-subdirs phase since we do not yet know if we need to
|
||||
# update vmlinux.
|
||||
# Therefore this step is delayed until just before final link of vmlinux.
|
||||
#
|
||||
# System.map is generated to document addresses of all kernel symbols
|
||||
|
||||
# Error out on error
|
||||
set -e
|
||||
|
||||
# Nice output in kbuild format
|
||||
# Will be supressed by "make -s"
|
||||
info()
|
||||
{
|
||||
if [ "${quiet}" != "silent_" ]; then
|
||||
printf " %-7s %s\n" ${1} ${2}
|
||||
fi
|
||||
}
|
||||
|
||||
# Link of vmlinux.o used for section mismatch analysis
|
||||
# ${1} output file
|
||||
modpost_link()
|
||||
{
|
||||
${LD} ${LDFLAGS} -r -o ${1} ${KBUILD_VMLINUX_INIT} \
|
||||
--start-group ${KBUILD_VMLINUX_MAIN} --end-group
|
||||
}
|
||||
|
||||
# Link of vmlinux
|
||||
# ${1} - optional extra .o files
|
||||
# ${2} - output file
|
||||
vmlinux_link()
|
||||
{
|
||||
local lds="${objtree}/${KBUILD_LDS}"
|
||||
|
||||
if [ "${SRCARCH}" != "um" ]; then
|
||||
${LD} ${LDFLAGS} ${LDFLAGS_vmlinux} -o ${2} \
|
||||
-T ${lds} ${KBUILD_VMLINUX_INIT} \
|
||||
--start-group ${KBUILD_VMLINUX_MAIN} --end-group ${1}
|
||||
else
|
||||
${CC} ${CFLAGS_vmlinux} -o ${2} \
|
||||
-Wl,-T,${lds} ${KBUILD_VMLINUX_INIT} \
|
||||
-Wl,--start-group \
|
||||
${KBUILD_VMLINUX_MAIN} \
|
||||
-Wl,--end-group \
|
||||
-lutil ${1}
|
||||
rm -f linux
|
||||
fi
|
||||
}
|
||||
|
||||
|
||||
# Create ${2} .o file with all symbols from the ${1} object file
|
||||
kallsyms()
|
||||
{
|
||||
info KSYM ${2}
|
||||
local kallsymopt;
|
||||
|
||||
if [ -n "${CONFIG_KALLSYMS_ALL}" ]; then
|
||||
kallsymopt=--all-symbols
|
||||
fi
|
||||
|
||||
local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \
|
||||
${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}"
|
||||
|
||||
${NM} -n ${1} | \
|
||||
scripts/kallsyms ${kallsymopt} | \
|
||||
${CC} ${aflags} -c -o ${2} -x assembler-with-cpp -
|
||||
}
|
||||
|
||||
# Create map file with all symbols from ${1}
|
||||
# See mksymap for additional details
|
||||
mksysmap()
|
||||
{
|
||||
${CONFIG_SHELL} "${srctree}/scripts/mksysmap" ${1} ${2}
|
||||
}
|
||||
|
||||
sortextable()
|
||||
{
|
||||
${objtree}/scripts/sortextable ${1}
|
||||
}
|
||||
|
||||
# Delete output files in case of error
|
||||
trap cleanup SIGHUP SIGINT SIGQUIT SIGTERM ERR
|
||||
cleanup()
|
||||
{
|
||||
rm -f .old_version
|
||||
rm -f .tmp_System.map
|
||||
rm -f .tmp_kallsyms*
|
||||
rm -f .tmp_version
|
||||
rm -f .tmp_vmlinux*
|
||||
rm -f System.map
|
||||
rm -f vmlinux
|
||||
rm -f vmlinux.o
|
||||
}
|
||||
|
||||
#
|
||||
#
|
||||
# Use "make V=1" to debug this script
|
||||
case "${KBUILD_VERBOSE}" in
|
||||
*1*)
|
||||
set -x
|
||||
;;
|
||||
esac
|
||||
|
||||
if [ "$1" = "clean" ]; then
|
||||
cleanup
|
||||
exit 0
|
||||
fi
|
||||
|
||||
# We need access to CONFIG_ symbols
|
||||
. ./.config
|
||||
|
||||
#link vmlinux.o
|
||||
info LD vmlinux.o
|
||||
modpost_link vmlinux.o
|
||||
|
||||
# modpost vmlinux.o to check for section mismatches
|
||||
${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o
|
||||
|
||||
# Update version
|
||||
info GEN .version
|
||||
if [ ! -r .version ]; then
|
||||
rm -f .version;
|
||||
echo 1 >.version;
|
||||
else
|
||||
mv .version .old_version;
|
||||
expr 0$(cat .old_version) + 1 >.version;
|
||||
fi;
|
||||
|
||||
# final build of init/
|
||||
${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init
|
||||
|
||||
kallsymso=""
|
||||
kallsyms_vmlinux=""
|
||||
if [ -n "${CONFIG_KALLSYMS}" ]; then
|
||||
|
||||
# kallsyms support
|
||||
# Generate section listing all symbols and add it into vmlinux
|
||||
# It's a three step process:
|
||||
# 1) Link .tmp_vmlinux1 so it has all symbols and sections,
|
||||
# but __kallsyms is empty.
|
||||
# Running kallsyms on that gives us .tmp_kallsyms1.o with
|
||||
# the right size
|
||||
# 2) Link .tmp_vmlinux2 so it now has a __kallsyms section of
|
||||
# the right size, but due to the added section, some
|
||||
# addresses have shifted.
|
||||
# From here, we generate a correct .tmp_kallsyms2.o
|
||||
# 2a) We may use an extra pass as this has been necessary to
|
||||
# woraround some alignment related bugs.
|
||||
# KALLSYMS_EXTRA_PASS=1 is used to trigger this.
|
||||
# 3) The correct ${kallsymso} is linked into the final vmlinux.
|
||||
#
|
||||
# a) Verify that the System.map from vmlinux matches the map from
|
||||
# ${kallsymso}.
|
||||
|
||||
kallsymso=.tmp_kallsyms2.o
|
||||
kallsyms_vmlinux=.tmp_vmlinux2
|
||||
|
||||
# step 1
|
||||
vmlinux_link "" .tmp_vmlinux1
|
||||
kallsyms .tmp_vmlinux1 .tmp_kallsyms1.o
|
||||
|
||||
# step 2
|
||||
vmlinux_link .tmp_kallsyms1.o .tmp_vmlinux2
|
||||
kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o
|
||||
|
||||
# step 2a
|
||||
if [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
|
||||
kallsymso=.tmp_kallsyms3.o
|
||||
kallsyms_vmlinux=.tmp_vmlinux3
|
||||
|
||||
vmlinux_link .tmp_kallsyms2.o .tmp_vmlinux3
|
||||
|
||||
kallsyms .tmp_vmlinux3 .tmp_kallsyms3.o
|
||||
fi
|
||||
fi
|
||||
|
||||
info LD vmlinux
|
||||
vmlinux_link "${kallsymso}" vmlinux
|
||||
|
||||
if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then
|
||||
info SORTEX vmlinux
|
||||
sortextable vmlinux
|
||||
fi
|
||||
|
||||
info SYSMAP System.map
|
||||
mksysmap vmlinux System.map
|
||||
|
||||
# step a (see comment above)
|
||||
if [ -n "${CONFIG_KALLSYMS}" ]; then
|
||||
mksysmap ${kallsyms_vmlinux} .tmp_System.map
|
||||
|
||||
if ! cmp -s System.map .tmp_System.map; then
|
||||
echo Inconsistent kallsyms data
|
||||
echo echo Try "make KALLSYMS_EXTRA_PASS=1" as a workaround
|
||||
cleanup
|
||||
exit 1
|
||||
fi
|
||||
fi
|
||||
|
||||
# We made a new kernel - delete old version file
|
||||
rm -f .old_version
|
||||
Loading…
Reference in New Issue
Block a user