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While descending directories, Kbuild produces objects for modules, but do not link final *.ko files; it is done in the modpost. To keep track of modules, Kbuild creates a *.mod file in $(MODVERDIR) for every module it is building. Some post-processing steps read the necessary information from *.mod files. This avoids descending into directories again. This mechanism was introduced in 2003 or so. Later, commit551559e13a("kbuild: implement modules.order") added modules.order. So, we can simply read it out to know all the modules with directory paths. This is easier than parsing the first line of *.mod files. $(MODVERDIR) has a flat directory structure, that is, *.mod files are named only with base names. This is based on the assumption that the module name is unique across the tree. This assumption is really fragile. Stephen Rothwell reported a race condition caused by a module name conflict: https://lkml.org/lkml/2019/5/13/991 In parallel building, two different threads could write to the same $(MODVERDIR)/*.mod simultaneously. Non-unique module names are the source of all kind of troubles, hence commit3a48a91901("kbuild: check uniqueness of module names") introduced a new checker script. However, it is still fragile in the build system point of view because this race happens before scripts/modules-check.sh is invoked. If it happens again, the modpost will emit unclear error messages. To fix this issue completely, create *.mod with full directory path so that two threads never attempt to write to the same file. $(MODVERDIR) is no longer needed. Since modules with directory paths are listed in modules.order, Kbuild is still able to find *.mod files without additional descending. I also killed cmd_secanalysis; scripts/mod/sumversion.c computes MD4 hash for modules with MODULE_VERSION(). When CONFIG_DEBUG_SECTION_MISMATCH=y, it occurs not only in the modpost stage, but also during directory descending, where sumversion.c may parse stale *.mod files. It would emit 'No such file or directory' warning when an object consisting a module is renamed, or when a single-obj module is turned into a multi-obj module or vice versa. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Nicolas Pitre <nico@fluxnic.net>
266 lines
2.6 KiB
Plaintext
266 lines
2.6 KiB
Plaintext
*.a
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*.aux
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*.bc
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*.bin
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*.bz2
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*.c.[012]*.*
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*.cis
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*.cpio
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*.csp
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*.dsp
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*.dvi
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*.elf
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*.eps
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*.fw
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*.gcno
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*.gcov
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*.gen.S
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*.gif
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*.grep
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*.grp
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*.gz
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*.html
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*.i
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*.jpeg
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*.ko
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*.ll
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*.log
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*.lst
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*.lzma
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*.lzo
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*.mo
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*.moc
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*.mod
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*.mod.c
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*.o
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*.o.*
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*.order
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*.orig
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*.out
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*.patch
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*.pdf
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*.plist
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*.png
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*.pot
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*.ps
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*.rej
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*.s
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*.sgml
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*.so
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*.so.dbg
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*.symtypes
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*.tab.c
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*.tab.h
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*.tex
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*.ver
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*.xml
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*.xz
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*_MODULES
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*_vga16.c
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*~
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\#*#
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*.9
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.*
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.*.d
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.mm
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53c700_d.h
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CVS
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ChangeSet
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GPATH
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GRTAGS
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GSYMS
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GTAGS
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Image
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Module.markers
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Module.symvers
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PENDING
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SCCS
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System.map*
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TAGS
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aconf
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af_names.h
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aic7*reg.h*
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aic7*reg_print.c*
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aic7*seq.h*
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aicasm
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aicdb.h*
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altivec*.c
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asm-offsets.h
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asm_offsets.h
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autoconf.h*
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av_permissions.h
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bbootsect
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bin2c
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binkernel.spec
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bootsect
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bounds.h
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bsetup
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btfixupprep
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build
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bvmlinux
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bzImage*
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capability_names.h
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capflags.c
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classlist.h*
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comp*.log
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compile.h*
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conf
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config
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config-*
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config.mak
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config.mak.autogen
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conmakehash
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consolemap_deftbl.c*
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cpustr.h
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crc32table.h*
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cscope.*
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defkeymap.c
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devlist.h*
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devicetable-offsets.h
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dnotify_test
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dslm
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dtc
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elf2ecoff
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elfconfig.h*
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evergreen_reg_safe.h
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fixdep
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flask.h
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fore200e_mkfirm
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fore200e_pca_fw.c*
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gconf
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gconf-cfg
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gen-devlist
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gen_crc32table
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gen_init_cpio
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generated
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genheaders
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genksyms
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*_gray256.c
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hpet_example
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hugepage-mmap
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hugepage-shm
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ihex2fw
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inat-tables.c
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initramfs_list
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int16.c
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int1.c
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int2.c
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int32.c
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int4.c
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int8.c
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kallsyms
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keywords.c
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ksym.c*
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ksym.h*
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*lex.c
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*lex.*.c
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linux
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logo_*.c
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logo_*_clut224.c
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logo_*_mono.c
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mach-types
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mach-types.h
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machtypes.h
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map
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map_hugetlb
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mconf
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mconf-cfg
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miboot*
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mk_elfconfig
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mkboot
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mkbugboot
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mkcpustr
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mkdep
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mkprep
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mkregtable
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mktables
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mktree
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mkutf8data
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modpost
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modules.builtin
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modules.builtin.modinfo
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modules.order
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modversions.h*
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nconf
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nconf-cfg
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ncscope.*
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offset.h
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oui.c*
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page-types
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parse.c
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parse.h
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patches*
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pca200e.bin
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pca200e_ecd.bin2
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perf.data
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perf.data.old
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perf-archive
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piggyback
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piggy.gzip
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piggy.S
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pnmtologo
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ppc_defs.h*
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pss_boot.h
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qconf
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qconf-cfg
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r100_reg_safe.h
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r200_reg_safe.h
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r300_reg_safe.h
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r420_reg_safe.h
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r600_reg_safe.h
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randomize_layout_hash.h
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randomize_layout_seed.h
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recordmcount
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relocs
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rlim_names.h
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rn50_reg_safe.h
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rs600_reg_safe.h
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rv515_reg_safe.h
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series
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setup
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setup.bin
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setup.elf
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sortextable
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sImage
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sm_tbl*
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split-include
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syscalltab.h
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tables.c
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tags
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test_get_len
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tftpboot.img
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timeconst.h
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times.h*
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trix_boot.h
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utsrelease.h*
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vdso-syms.lds
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vdso.lds
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vdso32-int80-syms.lds
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vdso32-syms.lds
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vdso32-syscall-syms.lds
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vdso32-sysenter-syms.lds
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vdso32.lds
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vdso32.so.dbg
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vdso64.lds
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vdso64.so.dbg
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version.h*
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vmImage
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vmlinux
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vmlinux-*
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vmlinux.aout
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vmlinux.bin.all
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vmlinux.lds
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vmlinuz
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voffset.h
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vsyscall.lds
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vsyscall_32.lds
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wanxlfw.inc
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uImage
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unifdef
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utf8data.h
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wakeup.bin
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wakeup.elf
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wakeup.lds
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zImage*
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zoffset.h
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