projects/linux·blob master · refs

171 lines · 5.5 KiB

1# SPDX-License-Identifier: GPL-2.0
2include ../scripts/Makefile.include
3include ../scripts/Makefile.arch
4
5ifeq ($(SRCARCH),x86)
6 BUILD_ORC := y
7 ARCH_HAS_KLP := y
8endif
9
10ifeq ($(SRCARCH),loongarch)
11 BUILD_ORC := y
12endif
13
14ifeq ($(ARCH_HAS_KLP),y)
15 HAVE_XXHASH = $(shell printf "$(pound)include <xxhash.h>\nXXH3_state_t *state;int main() {}" | \
16 $(HOSTCC) $(HOSTCFLAGS) -xc - -o /dev/null -lxxhash 2> /dev/null && echo y || echo n)
17 ifeq ($(HAVE_XXHASH),y)
18 BUILD_KLP := y
19 LIBXXHASH_CFLAGS := $(shell $(HOSTPKG_CONFIG) libxxhash --cflags 2>/dev/null) \
20 -DBUILD_KLP
21 LIBXXHASH_LIBS := $(shell $(HOSTPKG_CONFIG) libxxhash --libs 2>/dev/null || echo -lxxhash)
22 endif
23endif
24
25export BUILD_ORC BUILD_KLP
26
27ifeq ($(srctree),)
28srctree := $(patsubst %/,%,$(dir $(CURDIR)))
29srctree := $(patsubst %/,%,$(dir $(srctree)))
30endif
31
32RM ?= rm -f
33
34LIBSUBCMD_DIR = $(srctree)/tools/lib/subcmd/
35ifneq ($(OUTPUT),)
36 LIBSUBCMD_OUTPUT = $(abspath $(OUTPUT))/libsubcmd
37else
38 LIBSUBCMD_OUTPUT = $(CURDIR)/libsubcmd
39endif
40LIBSUBCMD = $(LIBSUBCMD_OUTPUT)/libsubcmd.a
41
42OBJTOOL := $(OUTPUT)objtool
43OBJTOOL_IN := $(OBJTOOL)-in.o
44
45LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null)
46LIBELF_LIBS := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf)
47
48all: $(OBJTOOL)
49
50WARNINGS := -Werror -Wall -Wextra -Wmissing-prototypes \
51 -Wmissing-declarations -Wwrite-strings \
52 -Wno-implicit-fallthrough -Wno-sign-compare \
53 -Wno-unused-parameter
54
55INCLUDES := -I$(srctree)/tools/include \
56 -I$(srctree)/tools/include/uapi \
57 -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
58 -I$(srctree)/tools/arch/$(SRCARCH)/include \
59 -I$(srctree)/tools/objtool/include \
60 -I$(srctree)/tools/objtool/arch/$(SRCARCH)/include \
61 -I$(srctree)/tools/lib
62
63OBJTOOL_CFLAGS := -std=gnu11 -fomit-frame-pointer -O2 -g $(WARNINGS) \
64 $(INCLUDES) $(LIBELF_FLAGS) $(LIBXXHASH_CFLAGS) $(HOSTCFLAGS)
65
66OBJTOOL_LDFLAGS := $(LIBSUBCMD) $(LIBELF_LIBS) $(LIBXXHASH_LIBS) $(HOSTLDFLAGS)
67
68# Allow old libelf to be used:
69elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(HOSTCC) $(OBJTOOL_CFLAGS) -x c -E - 2>/dev/null | grep elf_getshdr)
70OBJTOOL_CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
71
72# Always want host compilation.
73HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)"
74
75#
76# To support disassembly, objtool needs libopcodes which is provided
77# with libbfd (binutils-dev or binutils-devel package).
78#
79# We check using HOSTCC directly rather than the shared feature framework
80# because objtool is a host tool that links against host libraries.
81#
82# When using shared libraries, -lopcodes is sufficient as dependencies are
83# resolved automatically. With static libraries, we must explicitly link
84# against libopcodes' dependencies: libbfd, libiberty, and sometimes libz.
85# Try each combination and use the first one that succeeds.
86#
87LIBOPCODES_LIBS := $(shell \
88 for libs in "-lopcodes" \
89 "-lopcodes -lbfd" \
90 "-lopcodes -lbfd -liberty" \
91 "-lopcodes -lbfd -liberty -lz"; do \
92 printf '%s\n' \
93 '$(pound)include <bfd.h>' \
94 '$(pound)include <dis-asm.h>' \
95 'int main(void) { disassemble_init_for_target(0); return 0; }' | \
96 $(HOSTCC) $(HOSTCFLAGS) -DPACKAGE='"objtool"' -xc - -o /dev/null $$libs 2>/dev/null && \
97 echo "$$libs" && break; \
98 done)
99
100# Styled disassembler support requires binutils >= 2.39
101HAVE_DISASM_STYLED := $(shell echo '$(pound)include <dis-asm.h>' | \
102 $(HOSTCC) -E -xc - 2>/dev/null | grep -q disassembler_style && echo y)
103
104BUILD_DISAS := n
105
106ifneq ($(LIBOPCODES_LIBS),)
107 BUILD_DISAS := y
108 OBJTOOL_CFLAGS += -DDISAS -DPACKAGE='"objtool"'
109 OBJTOOL_LDFLAGS += $(LIBOPCODES_LIBS)
110ifeq ($(HAVE_DISASM_STYLED),y)
111 OBJTOOL_CFLAGS += -DDISASM_INIT_STYLED
112endif
113endif
114
115export BUILD_DISAS
116
117AWK = awk
118MKDIR = mkdir
119
120export srctree OUTPUT CFLAGS SRCARCH AWK
121include $(srctree)/tools/build/Makefile.include
122
123$(OBJTOOL_IN): fixdep $(LIBSUBCMD) FORCE
124 $(Q)$(CONFIG_SHELL) ./sync-check.sh
125 $(Q)$(MAKE) $(build)=objtool $(HOST_OVERRIDES) CFLAGS="$(OBJTOOL_CFLAGS)" \
126 LDFLAGS="$(OBJTOOL_LDFLAGS)"
127
128
129$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
130 $(QUIET_LINK)$(HOSTCC) $(OBJTOOL_IN) $(OBJTOOL_LDFLAGS) -o $@
131
132
133$(LIBSUBCMD_OUTPUT):
134 $(Q)$(MKDIR) -p $@
135
136$(LIBSUBCMD): fixdep $(LIBSUBCMD_OUTPUT) FORCE
137 $(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \
138 DESTDIR=$(LIBSUBCMD_OUTPUT) prefix= subdir= \
139 $(HOST_OVERRIDES) EXTRA_CFLAGS="$(OBJTOOL_CFLAGS)" \
140 $@
141
142$(LIBSUBCMD)-clean:
143 $(call QUIET_CLEAN, libsubcmd)
144 $(Q)$(RM) -r -- $(LIBSUBCMD_OUTPUT)
145
146clean: $(LIBSUBCMD)-clean
147 $(Q)find $(OUTPUT) \( -name '*.o' -o -name '\.*.cmd' -o -name '\.*.d' \) -type f -print | xargs $(RM)
148 $(Q)$(RM) $(OUTPUT)arch/x86/lib/cpu-feature-names.c $(OUTPUT)fixdep
149 $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
150 $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.objtool
151 $(Q)$(RM) -r -- $(OUTPUT)feature
152
153mrproper: clean
154 $(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
155
156# The kernel's own Makefile sets OBJCOPY, to llvm-objcopy under LLVM and to
157# $(CROSS_COMPILE)objcopy otherwise; tools/scripts/Makefile.include names only
158# LLVM_OBJCOPY and leaves OBJCOPY unset. Forwarding it unset would hand the
159# tests an empty string, and they would fall back to GNU objcopy even when
160# asked for an LLVM toolchain.
161OBJCOPY ?= $(if $(LLVM),$(LLVM_OBJCOPY),$(CROSS_COMPILE)objcopy)
162
163tests: $(OBJTOOL)
164 $(Q)OBJTOOL=$(abspath $(OBJTOOL)) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) \
165 CC='$(CC) $(CLANG_CROSS_FLAGS)' LD='$(LD)' \
166 READELF='$(READELF)' OBJCOPY='$(OBJCOPY)' \
167 KEEP=$(KEEP) $(srctree)/tools/objtool/tests/run-tests.sh
168
169FORCE:
170
171.PHONY: clean mrproper tests FORCE