6b90bd4ba4
This patch allows to build the whole kernel with GCC plugins. It was ported from
grsecurity/PaX. The infrastructure supports building out-of-tree modules and
building in a separate directory. Cross-compilation is supported too.
Currently the x86, arm, arm64 and uml architectures enable plugins.
The directory of the gcc plugins is scripts/gcc-plugins. You can use a file or a directory
there. The plugins compile with these options:
* -fno-rtti: gcc is compiled with this option so the plugins must use it too
* -fno-exceptions: this is inherited from gcc too
* -fasynchronous-unwind-tables: this is inherited from gcc too
* -ggdb: it is useful for debugging a plugin (better backtrace on internal
errors)
* -Wno-narrowing: to suppress warnings from gcc headers (ipa-utils.h)
* -Wno-unused-variable: to suppress warnings from gcc headers (gcc_version
variable, plugin-version.h)
The infrastructure introduces a new Makefile target called gcc-plugins. It
supports all gcc versions from 4.5 to 6.0. The scripts/gcc-plugin.sh script
chooses the proper host compiler (gcc-4.7 can be built by either gcc or g++).
This script also checks the availability of the included headers in
scripts/gcc-plugins/gcc-common.h.
The gcc-common.h header contains frequently included headers for GCC plugins
and it has a compatibility layer for the supported gcc versions.
The gcc-generate-*-pass.h headers automatically generate the registration
structures for GIMPLE, SIMPLE_IPA, IPA and RTL passes.
Note that 'make clean' keeps the *.so files (only the distclean or mrproper
targets clean all) because they are needed for out-of-tree modules.
Based on work created by the PaX Team.
Signed-off-by: Emese Revfy <re.emese@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michal Marek <mmarek@suse.com>
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*.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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*.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_data.h*
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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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dnotify_test
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docproc
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dslm
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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.glade.h
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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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ikconfig.h*
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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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kconfig
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keywords.c
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ksym.c*
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ksym.h*
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kxgettext
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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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lxdialog
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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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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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modpost
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modules.builtin
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modules.order
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modversions.h*
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nconf
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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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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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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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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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wakeup.bin
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wakeup.elf
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wakeup.lds
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zImage*
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zconf.hash.c
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zoffset.h
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