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 5purgatory-y += strcmp.o strlen.o strncmp.o 6 7targets += $(purgatory-y) 8PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y)) 9 10$(obj)/string.o: $(srctree)/lib/string.c FORCE 11 $(call if_changed_rule,cc_o_c) 12 13$(obj)/ctype.o: $(srctree)/lib/ctype.c FORCE 14 $(call if_changed_rule,cc_o_c) 15 16$(obj)/memcpy.o: $(srctree)/arch/riscv/lib/memcpy.S FORCE 17 $(call if_changed_rule,as_o_S) 18 19$(obj)/memset.o: $(srctree)/arch/riscv/lib/memset.S FORCE 20 $(call if_changed_rule,as_o_S) 21 22$(obj)/strcmp.o: $(srctree)/arch/riscv/lib/strcmp.S FORCE 23 $(call if_changed_rule,as_o_S) 24 25$(obj)/strlen.o: $(srctree)/arch/riscv/lib/strlen.S FORCE 26 $(call if_changed_rule,as_o_S) 27 28$(obj)/strncmp.o: $(srctree)/arch/riscv/lib/strncmp.S FORCE 29 $(call if_changed_rule,as_o_S) 30 31$(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE 32 $(call if_changed_rule,cc_o_c) 33 34CFLAGS_sha256.o := -D__DISABLE_EXPORTS 35CFLAGS_string.o := -D__DISABLE_EXPORTS 36CFLAGS_ctype.o := -D__DISABLE_EXPORTS 37 38# When linking purgatory.ro with -r unresolved symbols are not checked, 39# also link a purgatory.chk binary without -r to check for unresolved symbols. 40PURGATORY_LDFLAGS := -e purgatory_start -z nodefaultlib 41LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS) 42LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS) 43targets += purgatory.ro purgatory.chk 44 45# Sanitizer, etc. runtimes are unavailable and cannot be linked here. 46GCOV_PROFILE := n 47KASAN_SANITIZE := n 48UBSAN_SANITIZE := n 49KCSAN_SANITIZE := n 50KCOV_INSTRUMENT := n 51 52# These are adjustments to the compiler flags used for objects that 53# make up the standalone purgatory.ro 54 55PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel 56PURGATORY_CFLAGS := -mcmodel=medany -ffreestanding -fno-zero-initialized-in-bss 57PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING 58PURGATORY_CFLAGS += -fno-stack-protector -g0 59 60# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That 61# in turn leaves some undefined symbols like __fentry__ in purgatory and not 62# sure how to relocate those. 63ifdef CONFIG_FUNCTION_TRACER 64PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_FTRACE) 65endif 66 67ifdef CONFIG_STACKPROTECTOR 68PURGATORY_CFLAGS_REMOVE += -fstack-protector 69endif 70 71ifdef CONFIG_STACKPROTECTOR_STRONG 72PURGATORY_CFLAGS_REMOVE += -fstack-protector-strong 73endif 74 75CFLAGS_REMOVE_purgatory.o += $(PURGATORY_CFLAGS_REMOVE) 76CFLAGS_purgatory.o += $(PURGATORY_CFLAGS) 77 78CFLAGS_REMOVE_sha256.o += $(PURGATORY_CFLAGS_REMOVE) 79CFLAGS_sha256.o += $(PURGATORY_CFLAGS) 80 81CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE) 82CFLAGS_string.o += $(PURGATORY_CFLAGS) 83 84CFLAGS_REMOVE_ctype.o += $(PURGATORY_CFLAGS_REMOVE) 85CFLAGS_ctype.o += $(PURGATORY_CFLAGS) 86 87asflags-remove-y += $(foreach x, -g -gdwarf-4 -gdwarf-5, $(x) -Wa,$(x)) 88 89$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE 90 $(call if_changed,ld) 91 92$(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE 93 $(call if_changed,ld) 94 95$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro $(obj)/purgatory.chk 96 97obj-y += kexec-purgatory.o 98