1# SPDX-License-Identifier: GPL-2.0 2OBJECT_FILES_NON_STANDARD := y 3 4purgatory-y := purgatory.o sha256.o entry.o string.o ctype.o memcpy.o memset.o 5 6targets += $(purgatory-y) 7PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y)) 8 9$(obj)/string.o: $(srctree)/lib/string.c FORCE 10 $(call if_changed_rule,cc_o_c) 11 12$(obj)/ctype.o: $(srctree)/lib/ctype.c FORCE 13 $(call if_changed_rule,cc_o_c) 14 15$(obj)/memcpy.o: $(srctree)/arch/riscv/lib/memcpy.S FORCE 16 $(call if_changed_rule,as_o_S) 17 18$(obj)/memset.o: $(srctree)/arch/riscv/lib/memset.S FORCE 19 $(call if_changed_rule,as_o_S) 20 21$(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE 22 $(call if_changed_rule,cc_o_c) 23 24CFLAGS_sha256.o := -D__DISABLE_EXPORTS 25CFLAGS_string.o := -D__DISABLE_EXPORTS 26CFLAGS_ctype.o := -D__DISABLE_EXPORTS 27 28# When linking purgatory.ro with -r unresolved symbols are not checked, 29# also link a purgatory.chk binary without -r to check for unresolved symbols. 30PURGATORY_LDFLAGS := -e purgatory_start -z nodefaultlib 31LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS) 32LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS) 33targets += purgatory.ro purgatory.chk 34 35# Sanitizer, etc. runtimes are unavailable and cannot be linked here. 36GCOV_PROFILE := n 37KASAN_SANITIZE := n 38UBSAN_SANITIZE := n 39KCSAN_SANITIZE := n 40KCOV_INSTRUMENT := n 41 42# These are adjustments to the compiler flags used for objects that 43# make up the standalone purgatory.ro 44 45PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel 46PURGATORY_CFLAGS := -mcmodel=medany -ffreestanding -fno-zero-initialized-in-bss 47PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING 48PURGATORY_CFLAGS += -fno-stack-protector -g0 49 50# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That 51# in turn leaves some undefined symbols like __fentry__ in purgatory and not 52# sure how to relocate those. 53ifdef CONFIG_FUNCTION_TRACER 54PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_FTRACE) 55endif 56 57ifdef CONFIG_STACKPROTECTOR 58PURGATORY_CFLAGS_REMOVE += -fstack-protector 59endif 60 61ifdef CONFIG_STACKPROTECTOR_STRONG 62PURGATORY_CFLAGS_REMOVE += -fstack-protector-strong 63endif 64 65CFLAGS_REMOVE_purgatory.o += $(PURGATORY_CFLAGS_REMOVE) 66CFLAGS_purgatory.o += $(PURGATORY_CFLAGS) 67 68CFLAGS_REMOVE_sha256.o += $(PURGATORY_CFLAGS_REMOVE) 69CFLAGS_sha256.o += $(PURGATORY_CFLAGS) 70 71CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE) 72CFLAGS_string.o += $(PURGATORY_CFLAGS) 73 74CFLAGS_REMOVE_ctype.o += $(PURGATORY_CFLAGS_REMOVE) 75CFLAGS_ctype.o += $(PURGATORY_CFLAGS) 76 77AFLAGS_REMOVE_entry.o += -Wa,-gdwarf-2 78AFLAGS_REMOVE_memcpy.o += -Wa,-gdwarf-2 79AFLAGS_REMOVE_memset.o += -Wa,-gdwarf-2 80 81$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE 82 $(call if_changed,ld) 83 84$(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE 85 $(call if_changed,ld) 86 87targets += kexec-purgatory.c 88 89quiet_cmd_bin2c = BIN2C $@ 90 cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@ 91 92$(obj)/kexec-purgatory.c: $(obj)/purgatory.ro $(obj)/purgatory.chk FORCE 93 $(call if_changed,bin2c) 94 95obj-$(CONFIG_ARCH_HAS_KEXEC_PURGATORY) += kexec-purgatory.o 96