~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/scripts/Makefile.modpost

Version: ~ [ linux-6.11.5 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.58 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.114 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.169 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.228 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.284 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.322 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 # SPDX-License-Identifier: GPL-2.0
  2 # ===========================================================================
  3 # Module versions
  4 # ===========================================================================
  5 #
  6 # Stage one of module building created the following:
  7 # a) The individual .o files used for the module
  8 # b) A <module>.o file which is the .o files above linked together
  9 # c) A <module>.mod file, listing the name of the preliminary <module>.o file,
 10 #    plus all .o files
 11 # d) modules.order, which lists all the modules
 12 
 13 # Stage 2 is handled by this file and does the following
 14 # 1) Find all modules listed in modules.order
 15 # 2) modpost is then used to
 16 # 3)  create one <module>.mod.c file per module
 17 # 4)  create one Module.symvers file with CRC for all exported symbols
 18 
 19 # Step 3 is used to place certain information in the module's ELF
 20 # section, including information such as:
 21 #   Version magic (see include/linux/vermagic.h for full details)
 22 #     - Kernel release
 23 #     - SMP is CONFIG_SMP
 24 #     - PREEMPT is CONFIG_PREEMPT[_RT]
 25 #     - GCC Version
 26 #   Module info
 27 #     - Module version (MODULE_VERSION)
 28 #     - Module alias'es (MODULE_ALIAS)
 29 #     - Module license (MODULE_LICENSE)
 30 #     - See include/linux/module.h for more details
 31 
 32 # Step 4 is solely used to allow module versioning in external modules,
 33 # where the CRC of each module is retrieved from the Module.symvers file.
 34 
 35 PHONY := __modpost
 36 __modpost:
 37 
 38 include include/config/auto.conf
 39 include $(srctree)/scripts/Kbuild.include
 40 
 41 MODPOST = scripts/mod/modpost
 42 
 43 modpost-args =                                                                          \
 44         $(if $(CONFIG_MODULES),-M)                                                      \
 45         $(if $(CONFIG_MODVERSIONS),-m)                                                  \
 46         $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a)                                        \
 47         $(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E)                                  \
 48         $(if $(KBUILD_MODPOST_WARN),-w)                                                 \
 49         $(if $(KBUILD_NSDEPS),-d $(MODULES_NSDEPS))                                     \
 50         $(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N)       \
 51         $(if $(findstring 1, $(KBUILD_EXTRA_WARN)),-W)                                  \
 52         -o $@
 53 
 54 modpost-deps := $(MODPOST)
 55 
 56 # 'make -i -k' ignores compile errors, and builds as many modules as possible.
 57 ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
 58 modpost-args += -n
 59 endif
 60 
 61 # Read out modules.order to pass in modpost.
 62 # Otherwise, allmodconfig would fail with "Argument list too long".
 63 ifdef KBUILD_MODULES
 64 modpost-args += -T $(MODORDER)
 65 modpost-deps += $(MODORDER)
 66 endif
 67 
 68 ifeq ($(KBUILD_EXTMOD),)
 69 
 70 # Generate the list of in-tree objects in vmlinux
 71 # ---------------------------------------------------------------------------
 72 
 73 # This is used to retrieve symbol versions generated by genksyms.
 74 ifdef CONFIG_MODVERSIONS
 75 vmlinux.symvers Module.symvers: .vmlinux.objs
 76 endif
 77 
 78 # Ignore libgcc.a
 79 # Some architectures do '$(CC) --print-libgcc-file-name' to borrow libgcc.a
 80 # from the toolchain, but there is no EXPORT_SYMBOL in it.
 81 
 82 quiet_cmd_vmlinux_objs = GEN     $@
 83       cmd_vmlinux_objs =                \
 84         for f in $(real-prereqs); do    \
 85                 case $${f} in           \
 86                 *libgcc.a) ;;           \
 87                 *) $(AR) t $${f} ;;     \
 88                 esac                    \
 89         done > $@
 90 
 91 targets += .vmlinux.objs
 92 .vmlinux.objs: vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE
 93         $(call if_changed,vmlinux_objs)
 94 
 95 ifdef CONFIG_TRIM_UNUSED_KSYMS
 96 ksym-wl := $(CONFIG_UNUSED_KSYMS_WHITELIST)
 97 ksym-wl := $(if $(filter-out /%, $(ksym-wl)),$(if $(wildcard $(ksym-wl)),,$(srctree)/))$(ksym-wl)
 98 modpost-args += -t $(addprefix -u , $(ksym-wl))
 99 modpost-deps += $(ksym-wl)
100 endif
101 
102 ifeq ($(wildcard vmlinux.o),)
103 missing-input := vmlinux.o
104 output-symdump := modules-only.symvers
105 else
106 modpost-args += vmlinux.o
107 modpost-deps += vmlinux.o
108 output-symdump := $(if $(KBUILD_MODULES), Module.symvers, vmlinux.symvers)
109 endif
110 
111 else
112 
113 # set src + obj - they may be used in the modules's Makefile
114 obj := $(KBUILD_EXTMOD)
115 src := $(if $(VPATH),$(VPATH)/)$(obj)
116 
117 # Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
118 include $(kbuild-file)
119 
120 output-symdump := $(KBUILD_EXTMOD)/Module.symvers
121 
122 ifeq ($(wildcard Module.symvers),)
123 missing-input := Module.symvers
124 else
125 modpost-args += -i Module.symvers
126 modpost-deps += Module.symvers
127 endif
128 
129 modpost-args += -e $(addprefix -i , $(KBUILD_EXTRA_SYMBOLS))
130 
131 endif # ($(KBUILD_EXTMOD),)
132 
133 quiet_cmd_modpost = MODPOST $@
134       cmd_modpost = \
135         $(if $(missing-input), \
136                 echo >&2 "WARNING: $(missing-input) is missing."; \
137                 echo >&2 "         Modules may not have dependencies or modversions."; \
138                 echo >&2 "         You may get many unresolved symbol errors."; \
139                 echo >&2 "         You can set KBUILD_MODPOST_WARN=1 to turn errors into warning"; \
140                 echo >&2 "         if you want to proceed at your own risk.";) \
141         $(MODPOST) $(modpost-args)
142 
143 targets += $(output-symdump)
144 $(output-symdump): $(modpost-deps) FORCE
145         $(call if_changed,modpost)
146 
147 __modpost: $(output-symdump)
148 PHONY += FORCE
149 FORCE:
150 
151 existing-targets := $(wildcard $(sort $(targets)))
152 
153 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
154 
155 .PHONY: $(PHONY)

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

sflogo.php