linux/arch/x86/crypto
Linus Torvalds 26660a4046 Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull 'objtool' stack frame validation from Ingo Molnar:
 "This tree adds a new kernel build-time object file validation feature
  (ONFIG_STACK_VALIDATION=y): kernel stack frame correctness validation.
  It was written by and is maintained by Josh Poimboeuf.

  The motivation: there's a category of hard to find kernel bugs, most
  of them in assembly code (but also occasionally in C code), that
  degrades the quality of kernel stack dumps/backtraces.  These bugs are
  hard to detect at the source code level.  Such bugs result in
  incorrect/incomplete backtraces most of time - but can also in some
  rare cases result in crashes or other undefined behavior.

  The build time correctness checking is done via the new 'objtool'
  user-space utility that was written for this purpose and which is
  hosted in the kernel repository in tools/objtool/.  The tool's (very
  simple) UI and source code design is shaped after Git and perf and
  shares quite a bit of infrastructure with tools/perf (which tooling
  infrastructure sharing effort got merged via perf and is already
  upstream).  Objtool follows the well-known kernel coding style.

  Objtool does not try to check .c or .S files, it instead analyzes the
  resulting .o generated machine code from first principles: it decodes
  the instruction stream and interprets it.  (Right now objtool supports
  the x86-64 architecture.)

  From tools/objtool/Documentation/stack-validation.txt:

   "The kernel CONFIG_STACK_VALIDATION option enables a host tool named
    objtool which runs at compile time.  It has a "check" subcommand
    which analyzes every .o file and ensures the validity of its stack
    metadata.  It enforces a set of rules on asm code and C inline
    assembly code so that stack traces can be reliable.

    Currently it only checks frame pointer usage, but there are plans to
    add CFI validation for C files and CFI generation for asm files.

    For each function, it recursively follows all possible code paths
    and validates the correct frame pointer state at each instruction.

    It also follows code paths involving special sections, like
    .altinstructions, __jump_table, and __ex_table, which can add
    alternative execution paths to a given instruction (or set of
    instructions).  Similarly, it knows how to follow switch statements,
    for which gcc sometimes uses jump tables."

  When this new kernel option is enabled (it's disabled by default), the
  tool, if it finds any suspicious assembly code pattern, outputs
  warnings in compiler warning format:

    warning: objtool: rtlwifi_rate_mapping()+0x2e7: frame pointer state mismatch
    warning: objtool: cik_tiling_mode_table_init()+0x6ce: call without frame pointer save/setup
    warning: objtool:__schedule()+0x3c0: duplicate frame pointer save
    warning: objtool:__schedule()+0x3fd: sibling call from callable instruction with changed frame pointer

  ... so that scripts that pick up compiler warnings will notice them.
  All known warnings triggered by the tool are fixed by the tree, most
  of the commits in fact prepare the kernel to be warning-free.  Most of
  them are bugfixes or cleanups that stand on their own, but there are
  also some annotations of 'special' stack frames for justified cases
  such entries to JIT-ed code (BPF) or really special boot time code.

  There are two other long-term motivations behind this tool as well:

   - To improve the quality and reliability of kernel stack frames, so
     that they can be used for optimized live patching.

   - To create independent infrastructure to check the correctness of
     CFI stack frames at build time.  CFI debuginfo is notoriously
     unreliable and we cannot use it in the kernel as-is without extra
     checking done both on the kernel side and on the build side.

  The quality of kernel stack frames matters to debuggability as well,
  so IMO we can merge this without having to consider the live patching
  or CFI debuginfo angle"

* 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits)
  objtool: Only print one warning per function
  objtool: Add several performance improvements
  tools: Copy hashtable.h into tools directory
  objtool: Fix false positive warnings for functions with multiple switch statements
  objtool: Rename some variables and functions
  objtool: Remove superflous INIT_LIST_HEAD
  objtool: Add helper macros for traversing instructions
  objtool: Fix false positive warnings related to sibling calls
  objtool: Compile with debugging symbols
  objtool: Detect infinite recursion
  objtool: Prevent infinite recursion in noreturn detection
  objtool: Detect and warn if libelf is missing and don't break the build
  tools: Support relative directory path for 'O='
  objtool: Support CROSS_COMPILE
  x86/asm/decoder: Use explicitly signed chars
  objtool: Enable stack metadata validation on 64-bit x86
  objtool: Add CONFIG_STACK_VALIDATION option
  objtool: Add tool to perform compile-time stack metadata validation
  x86/kprobes: Mark kretprobe_trampoline() stack frame as non-standard
  sched: Always inline context_switch()
  ...
2016-03-20 18:23:21 -07:00
..
sha-mb Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-20 18:23:21 -07:00
Makefile crypto: x86/sha - Add build support for Intel SHA Extensions optimized SHA1 and SHA256 2015-09-21 22:01:06 +08:00
aes-i586-asm_32.S crypto: x86/aes - assembler clean-ups: use ENTRY/ENDPROC, localize jump targets 2013-01-20 10:16:47 +11:00
aes-x86_64-asm_64.S crypto: x86/aes - assembler clean-ups: use ENTRY/ENDPROC, localize jump targets 2013-01-20 10:16:47 +11:00
aes_ctrby8_avx-x86_64.S crypto: aesni - fix "by8" variant for 128 bit keys 2015-01-05 21:35:02 +11:00
aes_glue.c crypto: prefix module autoloading with "crypto-" 2014-11-24 22:43:57 +08:00
aesni-intel_asm.S x86/asm/crypto: Create stack frames in crypto functions 2016-02-24 08:35:43 +01:00
aesni-intel_avx-x86_64.S crypto: aesni - fix build on x86 (32bit) 2014-01-15 11:36:34 +08:00
aesni-intel_glue.c crypto: xts - consolidate sanity check for keys 2016-02-17 04:07:51 +08:00
blowfish-x86_64-asm_64.S crypto: blowfish-x86_64: use ENTRY()/ENDPROC() for assembler functions and localize jump targets 2013-01-20 10:16:48 +11:00
blowfish_glue.c crypto: prefix module autoloading with "crypto-" 2014-11-24 22:43:57 +08:00
camellia-aesni-avx-asm_64.S x86/asm/crypto: Create stack frames in crypto functions 2016-02-24 08:35:43 +01:00
camellia-aesni-avx2-asm_64.S x86/asm/crypto: Create stack frames in crypto functions 2016-02-24 08:35:43 +01:00
camellia-x86_64-asm_64.S crypto: camellia-x86_64/aes-ni: use ENTRY()/ENDPROC() for assembler functions and localize jump targets 2013-01-20 10:16:48 +11:00
camellia_aesni_avx2_glue.c x86/fpu: Rename XSAVE macros 2015-09-14 12:21:46 +02:00
camellia_aesni_avx_glue.c Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-11-03 20:50:26 -08:00
camellia_glue.c crypto: xts - consolidate sanity check for keys 2016-02-17 04:07:51 +08:00
cast5-avx-x86_64-asm_64.S x86/asm/crypto: Create stack frames in crypto functions 2016-02-24 08:35:43 +01:00
cast5_avx_glue.c x86/fpu: Rename XSAVE macros 2015-09-14 12:21:46 +02:00
cast6-avx-x86_64-asm_64.S x86/asm/crypto: Create stack frames in crypto functions 2016-02-24 08:35:43 +01:00
cast6_avx_glue.c crypto: xts - consolidate sanity check for keys 2016-02-17 04:07:51 +08:00
chacha20-avx2-x86_64.S crypto: chacha20 - Add an eight block AVX2 variant for x86_64 2015-07-17 21:20:25 +08:00
chacha20-ssse3-x86_64.S crypto: chacha20-ssse3 - Align stack pointer to 64 bytes 2016-01-25 21:47:45 +08:00
chacha20_glue.c x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros 2015-12-19 11:49:55 +01:00
crc32-pclmul_asm.S x86, crc32-pclmul: Fix build with older binutils 2013-05-30 16:36:23 -07:00
crc32-pclmul_glue.c x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
crc32c-intel_glue.c x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
crc32c-pcl-intel-asm_64.S x86/asm/crypto: Move jump_table to .rodata section 2016-02-24 08:35:42 +01:00
crct10dif-pcl-asm_64.S Reinstate "crypto: crct10dif - Wrap crc_t10dif function all to use crypto transform framework" 2013-09-07 12:56:26 +10:00
crct10dif-pclmul_glue.c x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
des3_ede-asm_64.S crypto: des_3des - add x86-64 assembly implementation 2014-06-20 21:27:58 +08:00
des3_ede_glue.c crypto: x86/des3_ede - drop bogus module aliases 2015-01-13 22:30:52 +11:00
fpu.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2015-06-22 21:04:48 -07:00
ghash-clmulni-intel_asm.S x86/asm/crypto: Create stack frames in crypto functions 2016-02-24 08:35:43 +01:00
ghash-clmulni-intel_glue.c crypto: ghash-clmulni - Fix load failure 2015-12-04 22:29:53 +08:00
glue_helper-asm-avx.S crypto: x86 - add more optimized XTS-mode for serpent-avx 2013-04-25 21:01:51 +08:00
glue_helper-asm-avx2.S crypto: twofish - add AVX2/x86_64 assembler implementation of twofish cipher 2013-04-25 21:09:05 +08:00
glue_helper.c crypto: don't export static symbol 2015-03-13 21:37:15 +11:00
poly1305-avx2-x86_64.S crypto: poly1305 - Add a four block AVX2 variant for x86_64 2015-07-17 21:20:29 +08:00
poly1305-sse2-x86_64.S crypto: poly1305 - Add a two block SSE2 variant for x86_64 2015-07-17 21:20:28 +08:00
poly1305_glue.c x86/fpu: Rename XSAVE macros 2015-09-14 12:21:46 +02:00
salsa20-i586-asm_32.S crypto: x86/salsa20 - assembler cleanup, use ENTRY/ENDPROC for assember functions and rename ECRYPT_* to salsa20_* 2013-01-20 10:16:50 +11:00
salsa20-x86_64-asm_64.S crypto: x86/salsa20 - assembler cleanup, use ENTRY/ENDPROC for assember functions and rename ECRYPT_* to salsa20_* 2013-01-20 10:16:50 +11:00
salsa20_glue.c crypto: prefix module autoloading with "crypto-" 2014-11-24 22:43:57 +08:00
serpent-avx-x86_64-asm_64.S x86/asm/crypto: Create stack frames in crypto functions 2016-02-24 08:35:43 +01:00
serpent-avx2-asm_64.S x86/asm/crypto: Create stack frames in crypto functions 2016-02-24 08:35:43 +01:00
serpent-sse2-i586-asm_32.S crypto: x86/serpent - use ENTRY/ENDPROC for assember functions and localize jump targets 2013-01-20 10:16:50 +11:00
serpent-sse2-x86_64-asm_64.S crypto: x86/serpent - use ENTRY/ENDPROC for assember functions and localize jump targets 2013-01-20 10:16:50 +11:00
serpent_avx2_glue.c x86/fpu: Rename XSAVE macros 2015-09-14 12:21:46 +02:00
serpent_avx_glue.c crypto: xts - consolidate sanity check for keys 2016-02-17 04:07:51 +08:00
serpent_sse2_glue.c crypto: xts - consolidate sanity check for keys 2016-02-17 04:07:51 +08:00
sha1_avx2_x86_64_asm.S crypto: x86/sha1 - reduce size of the AVX2 asm implementation 2014-03-25 20:25:43 +08:00
sha1_ni_asm.S crypto: x86/sha - Intel SHA Extensions optimized SHA1 transform function 2015-09-21 22:01:05 +08:00
sha1_ssse3_asm.S crypto: x86/sha1 - assembler clean-ups: use ENTRY/ENDPROC 2013-01-20 10:16:51 +11:00
sha1_ssse3_glue.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2015-11-04 09:11:12 -08:00
sha256-avx-asm.S crypto: x86/sha256_ssse3 - move SHA-224/256 SSSE3 implementation to base layer 2015-04-10 21:39:47 +08:00
sha256-avx2-asm.S crypto: x86/sha256_ssse3 - move SHA-224/256 SSSE3 implementation to base layer 2015-04-10 21:39:47 +08:00
sha256-ssse3-asm.S crypto: x86/sha256_ssse3 - move SHA-224/256 SSSE3 implementation to base layer 2015-04-10 21:39:47 +08:00
sha256_ni_asm.S crypto: x86/sha - Intel SHA Extensions optimized SHA256 transform function 2015-09-21 22:01:06 +08:00
sha256_ssse3_glue.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2015-11-04 09:11:12 -08:00
sha512-avx-asm.S crypto: x86/sha512_ssse3 - move SHA-384/512 SSSE3 implementation to base layer 2015-04-10 21:39:48 +08:00
sha512-avx2-asm.S crypto: x86/sha512_ssse3 - fixup for asm function prototype change 2015-04-24 20:09:01 +08:00
sha512-ssse3-asm.S crypto: x86/sha512_ssse3 - move SHA-384/512 SSSE3 implementation to base layer 2015-04-10 21:39:48 +08:00
sha512_ssse3_glue.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2015-11-04 09:11:12 -08:00
twofish-avx-x86_64-asm_64.S x86/asm/crypto: Create stack frames in crypto functions 2016-02-24 08:35:43 +01:00
twofish-i586-asm_32.S crypto: x86/twofish - assembler clean-ups: use ENTRY/ENDPROC, localize jump labels 2013-01-20 10:16:51 +11:00
twofish-x86_64-asm_64-3way.S crypto: x86/twofish - assembler clean-ups: use ENTRY/ENDPROC, localize jump labels 2013-01-20 10:16:51 +11:00
twofish-x86_64-asm_64.S x86/asm: Replace "MOVQ $imm, %reg" with MOVL 2015-04-01 13:17:39 +02:00
twofish_avx_glue.c x86/fpu: Fixup uninitialized feature_name warning 2015-09-24 09:21:20 +02:00
twofish_glue.c crypto: prefix module autoloading with "crypto-" 2014-11-24 22:43:57 +08:00
twofish_glue_3way.c crypto: xts - consolidate sanity check for keys 2016-02-17 04:07:51 +08:00