Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) # SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) # Building vDSO images for sparc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) VDSO64-$(CONFIG_SPARC64)	:= y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) VDSOCOMPAT-$(CONFIG_COMPAT)	:= y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) # files to link into the vdso
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) vobjs-y := vdso-note.o vclock_gettime.o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) # files to link into kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) obj-y				+= vma.o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) # vDSO images to build
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) vdso_img-$(VDSO64-y)		+= 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) vdso_img-$(VDSOCOMPAT-y)	+= 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) $(obj)/vdso.o: $(obj)/vdso.so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) targets += vdso.lds $(vobjs-y)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) # Build the vDSO image C files and link them in.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) vdso_img_objs := $(vdso_img-y:%=vdso-image-%.o)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) vdso_img_cfiles := $(vdso_img-y:%=vdso-image-%.c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) vdso_img_sodbg := $(vdso_img-y:%=vdso%.so.dbg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) obj-y += $(vdso_img_objs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) targets += $(vdso_img_cfiles)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) targets += $(vdso_img_sodbg) $(vdso_img-y:%=vdso%.so)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) CPPFLAGS_vdso.lds += -P -C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname linux-vdso.so.1 --no-undefined \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 			-z max-page-size=8192
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	$(call if_changed,vdso)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) HOST_EXTRACFLAGS += -I$(srctree)/tools/include
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) hostprogs += vdso2c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) quiet_cmd_vdso2c = VDSO2C  $@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)       cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	$(call if_changed,vdso2c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) # Don't omit frame pointers for ease of userspace debugging, but do
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) # optimize sibling calls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables -m64 \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)        $(filter -g%,$(KBUILD_CFLAGS)) -fno-stack-protector \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)        -fno-omit-frame-pointer -foptimize-sibling-calls \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)        -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcall-used-g5 -fcall-used-g7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) $(vobjs): KBUILD_CFLAGS := $(filter-out $(GCC_PLUGINS_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) CFLAGS_REMOVE_vclock_gettime.o = -pg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) $(obj)/%.so: OBJCOPYFLAGS := -S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) $(obj)/%.so: $(obj)/%.so.dbg FORCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	$(call if_changed,objcopy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.lds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -soname linux-gate.so.1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) #This makes sure the $(obj) subdirectory exists even though vdso32/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) #is not a kbuild sub-make subdirectory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) override obj-dirs = $(dir $(obj)) $(obj)/vdso32/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) targets += vdso32/vdso32.lds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) targets += vdso32/vdso-note.o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) targets += vdso32/vclock_gettime.o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64) += -m32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS_32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) KBUILD_CFLAGS_32 += -fno-stack-protector
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) KBUILD_CFLAGS_32 += -mv8plus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) $(obj)/vdso32.so.dbg: FORCE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 			$(obj)/vdso32/vdso32.lds \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			$(obj)/vdso32/vclock_gettime.o \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			$(obj)/vdso32/vdso-note.o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		$(call	if_changed,vdso)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) # The DSO images are built using a special linker script.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) quiet_cmd_vdso = VDSO    $@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)       cmd_vdso = $(LD) -nostdlib -o $@ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		       $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		       -T $(filter %.lds,$^) $(filter %.o,$^) && \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		sh $(srctree)/$(src)/checkundef.sh '$(OBJDUMP)' '$@'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 -Bsymbolic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) GCOV_PROFILE := n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) # Install the unstripped copies of vdso*.so.  If our toolchain supports
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) # build-id, install .build-id links as well.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) quiet_cmd_vdso_install = INSTALL $(@:install_%=%)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) define cmd_vdso_install
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	if readelf -n $< |grep -q 'Build ID'; then \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	  buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	  first=`echo $$buildid | cut -b-2`; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	  last=`echo $$buildid | cut -b3-`; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	  mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	  ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	fi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) endef
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) $(MODLIB)/vdso: FORCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	@mkdir -p $(MODLIB)/vdso
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) $(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso FORCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	$(call cmd,vdso_install)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) PHONY += vdso_install $(vdso_img_insttargets)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) vdso_install: $(vdso_img_insttargets) FORCE