cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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Makefile.vmlinux_o (2697B)

      1# SPDX-License-Identifier: GPL-2.0-only
      2
      3PHONY := __default
      4__default: vmlinux.o
      5
      6include include/config/auto.conf
      7include $(srctree)/scripts/Kbuild.include
      8
      9# for objtool
     10include $(srctree)/scripts/Makefile.lib
     11
     12# Generate a linker script to ensure correct ordering of initcalls for Clang LTO
     13# ---------------------------------------------------------------------------
     14
     15quiet_cmd_gen_initcalls_lds = GEN     $@
     16      cmd_gen_initcalls_lds = \
     17	$(PYTHON3) $(srctree)/scripts/jobserver-exec \
     18	$(PERL) $(real-prereqs) > $@
     19
     20.tmp_initcalls.lds: $(srctree)/scripts/generate_initcall_order.pl \
     21		$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE
     22	$(call if_changed,gen_initcalls_lds)
     23
     24targets := .tmp_initcalls.lds
     25
     26ifdef CONFIG_LTO_CLANG
     27initcalls-lds := .tmp_initcalls.lds
     28endif
     29
     30# objtool for vmlinux.o
     31# ---------------------------------------------------------------------------
     32#
     33# For LTO and IBT, objtool doesn't run on individual translation units.
     34# Run everything on vmlinux instead.
     35
     36objtool-enabled := $(or $(delay-objtool),$(CONFIG_NOINSTR_VALIDATION))
     37
     38# Reuse objtool_args defined in scripts/Makefile.lib if LTO or IBT is enabled.
     39#
     40# Add some more flags as needed.
     41# --no-unreachable and --link might be added twice, but it is fine.
     42#
     43# Expand objtool_args to a simple variable to avoid circular reference.
     44
     45objtool_args := \
     46	$(if $(delay-objtool),$(objtool_args)) \
     47	$(if $(CONFIG_NOINSTR_VALIDATION), --noinstr) \
     48	$(if $(CONFIG_GCOV_KERNEL), --no-unreachable) \
     49	--link
     50
     51# Link of vmlinux.o used for section mismatch analysis
     52# ---------------------------------------------------------------------------
     53
     54quiet_cmd_ld_vmlinux.o = LD      $@
     55      cmd_ld_vmlinux.o = \
     56	$(LD) ${KBUILD_LDFLAGS} -r -o $@ \
     57	$(addprefix -T , $(initcalls-lds)) \
     58	--whole-archive $(KBUILD_VMLINUX_OBJS) --no-whole-archive \
     59	--start-group $(KBUILD_VMLINUX_LIBS) --end-group \
     60	$(cmd_objtool)
     61
     62define rule_ld_vmlinux.o
     63	$(call cmd_and_savecmd,ld_vmlinux.o)
     64	$(call cmd,gen_objtooldep)
     65endef
     66
     67vmlinux.o: $(initcalls-lds) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE
     68	$(call if_changed_rule,ld_vmlinux.o)
     69
     70targets += vmlinux.o
     71
     72# Add FORCE to the prequisites of a target to force it to be always rebuilt.
     73# ---------------------------------------------------------------------------
     74
     75PHONY += FORCE
     76FORCE:
     77
     78# Read all saved command lines and dependencies for the $(targets) we
     79# may be building above, using $(if_changed{,_dep}). As an
     80# optimization, we don't need to read them if the target does not
     81# exist, we will rebuild anyway in that case.
     82
     83existing-targets := $(wildcard $(sort $(targets)))
     84
     85-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
     86
     87.PHONY: $(PHONY)