Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) # SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) # Building a vDSO image for AArch64.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) # Author: Will Deacon <will.deacon@arm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) # Heavily based on the vDSO Makefiles for other archs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) # Absolute relocation type $(ARCH_REL_TYPE_ABS) needs to be defined before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) # the inclusion of generic Makefile.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) ARCH_REL_TYPE_ABS := R_AARCH64_JUMP_SLOT|R_AARCH64_GLOB_DAT|R_AARCH64_ABS64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) include $(srctree)/lib/vdso/Makefile
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) obj-vdso := vgettimeofday.o note.o sigreturn.o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) # Build rules
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) targets := $(obj-vdso) vdso.so vdso.so.dbg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) btildflags-$(CONFIG_ARM64_BTI_KERNEL) += -z force-bti
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) # -Bsymbolic has been added for consistency with arm, the compat vDSO and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) # potential future proofing if we end up with internal calls to the exported
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) # routines, as x86 does (see 6f121e548f83 ("x86, vdso: Reimplement vdso.so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) # preparation in build-time C")).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) ldflags-y := -shared -nostdlib -soname=linux-vdso.so.1 --hash-style=sysv	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	     -Bsymbolic $(call ld-option, --no-eh-frame-hdr) --build-id=sha1 -n	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	     $(btildflags-y) -T
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) ccflags-y := -fno-common -fno-builtin -fno-stack-protector -ffixed-x18
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) $(GCC_PLUGINS_CFLAGS) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 				$(CC_FLAGS_LTO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) KASAN_SANITIZE			:= n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) UBSAN_SANITIZE			:= n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) OBJECT_FILES_NON_STANDARD	:= y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) KCOV_INSTRUMENT			:= n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) CFLAGS_vgettimeofday.o = -O2 -mcmodel=tiny -fasynchronous-unwind-tables
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) ifneq ($(c-gettimeofday-y),)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)   CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) # Disable gcov profiling for VDSO code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) GCOV_PROFILE := n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) obj-y += vdso.o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) targets += vdso.lds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) # Force dependency (incbin is bad)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) $(obj)/vdso.o : $(obj)/vdso.so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) # Link rule for the .so file, .lds has to be first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) $(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	$(call if_changed,vdsold_and_vdso_check)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) # Strip rule for the .so file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) $(obj)/%.so: OBJCOPYFLAGS := -S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) $(obj)/%.so: $(obj)/%.so.dbg FORCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	$(call if_changed,objcopy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) # Generate VDSO offsets using helper script
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) quiet_cmd_vdsosym = VDSOSYM $@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)       cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) include/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	$(call if_changed,vdsosym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) # Actual build commands
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) quiet_cmd_vdsold_and_vdso_check = LD      $@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)       cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) # Install commands for the unstripped file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) quiet_cmd_vdso_install = INSTALL $@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)       cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) vdso.so: $(obj)/vdso.so.dbg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	@mkdir -p $(MODLIB)/vdso
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 	$(call cmd,vdso_install)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) vdso_install: vdso.so