projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 736e30af LZ |
1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | OBJECT_FILES_NON_STANDARD := y | |
| 3 | ||
| 4 | purgatory-y := purgatory.o sha256.o entry.o string.o ctype.o memcpy.o memset.o | |
| 56e0790c | 5 | purgatory-y += strcmp.o strlen.o strncmp.o |
| 736e30af LZ |
6 | |
| 7 | targets += $(purgatory-y) | |
| 8 | PURGATORY_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 | ||
| 56e0790c HS |
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 | ||
| 736e30af LZ |
31 | $(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE |
| 32 | $(call if_changed_rule,cc_o_c) | |
| 33 | ||
| 8762606a | 34 | CFLAGS_sha256.o := -D__DISABLE_EXPORTS -D__NO_FORTIFY |
| 736e30af LZ |
35 | CFLAGS_string.o := -D__DISABLE_EXPORTS |
| 36 | CFLAGS_ctype.o := -D__DISABLE_EXPORTS | |
| 37 | ||
| 88ac3bbc RR |
38 | # When profile-guided optimization is enabled, llvm emits two different |
| 39 | # overlapping text sections, which is not supported by kexec. Remove profile | |
| 40 | # optimization flags. | |
| 41 | KBUILD_CFLAGS := $(filter-out -fprofile-sample-use=% -fprofile-use=%,$(KBUILD_CFLAGS)) | |
| 42 | ||
| 736e30af LZ |
43 | # When linking purgatory.ro with -r unresolved symbols are not checked, |
| 44 | # also link a purgatory.chk binary without -r to check for unresolved symbols. | |
| 45 | PURGATORY_LDFLAGS := -e purgatory_start -z nodefaultlib | |
| 46 | LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS) | |
| 47 | LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS) | |
| 48 | targets += purgatory.ro purgatory.chk | |
| 49 | ||
| 50 | # Sanitizer, etc. runtimes are unavailable and cannot be linked here. | |
| 51 | GCOV_PROFILE := n | |
| 52 | KASAN_SANITIZE := n | |
| 53 | UBSAN_SANITIZE := n | |
| 54 | KCSAN_SANITIZE := n | |
| 55 | KCOV_INSTRUMENT := n | |
| 56 | ||
| 57 | # These are adjustments to the compiler flags used for objects that | |
| 58 | # make up the standalone purgatory.ro | |
| 59 | ||
| 60 | PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel | |
| 61 | PURGATORY_CFLAGS := -mcmodel=medany -ffreestanding -fno-zero-initialized-in-bss | |
| 62 | PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING | |
| 63 | PURGATORY_CFLAGS += -fno-stack-protector -g0 | |
| 64 | ||
| 65 | # Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That | |
| 66 | # in turn leaves some undefined symbols like __fentry__ in purgatory and not | |
| 67 | # sure how to relocate those. | |
| 68 | ifdef CONFIG_FUNCTION_TRACER | |
| 69 | PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_FTRACE) | |
| 70 | endif | |
| 71 | ||
| 72 | ifdef CONFIG_STACKPROTECTOR | |
| 73 | PURGATORY_CFLAGS_REMOVE += -fstack-protector | |
| 74 | endif | |
| 75 | ||
| 76 | ifdef CONFIG_STACKPROTECTOR_STRONG | |
| 77 | PURGATORY_CFLAGS_REMOVE += -fstack-protector-strong | |
| 78 | endif | |
| 79 | ||
| a72ab036 ST |
80 | ifdef CONFIG_CFI_CLANG |
| 81 | PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_CFI) | |
| 82 | endif | |
| 83 | ||
| 736e30af LZ |
84 | CFLAGS_REMOVE_purgatory.o += $(PURGATORY_CFLAGS_REMOVE) |
| 85 | CFLAGS_purgatory.o += $(PURGATORY_CFLAGS) | |
| 86 | ||
| 87 | CFLAGS_REMOVE_sha256.o += $(PURGATORY_CFLAGS_REMOVE) | |
| 88 | CFLAGS_sha256.o += $(PURGATORY_CFLAGS) | |
| 89 | ||
| 90 | CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE) | |
| 91 | CFLAGS_string.o += $(PURGATORY_CFLAGS) | |
| 92 | ||
| 93 | CFLAGS_REMOVE_ctype.o += $(PURGATORY_CFLAGS_REMOVE) | |
| 94 | CFLAGS_ctype.o += $(PURGATORY_CFLAGS) | |
| 95 | ||
| d83806c4 | 96 | asflags-remove-y += $(foreach x, -g -gdwarf-4 -gdwarf-5, $(x) -Wa,$(x)) |
| 736e30af LZ |
97 | |
| 98 | $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE | |
| 99 | $(call if_changed,ld) | |
| 100 | ||
| 101 | $(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE | |
| 102 | $(call if_changed,ld) | |
| 103 | ||
| d8357e3b | 104 | $(obj)/kexec-purgatory.o: $(obj)/purgatory.ro $(obj)/purgatory.chk |
| 736e30af | 105 | |
| 788177e7 | 106 | obj-y += kexec-purgatory.o |