mirror of https://github.com/wolfSSL/wolfssl.git
linuxkm: override-disable SIMD instructions for all .c.o's, with exceptions enumerated in Kbuild (currently only aes.c), and couple -msse with -fno-builtin-functions; export ENABLED_ASM for use as a pivot in Kbuild; use asm/i387.h, not asm/simd.h, for kernel_fpu_{begin,end}() protos.
Daniel Pouzzner
parent
3626332334
commit
cd14cfb092
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@ -198,7 +198,7 @@ endif
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include scripts/include.am
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if BUILD_LINUXKM
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export KERNEL_ROOT KERNEL_ARCH KERNEL_OPT AM_CFLAGS CFLAGS AM_CCASFLAGS CCASFLAGS src_libwolfssl_la_OBJECTS ENABLED_CRYPT_TESTS
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export KERNEL_ROOT KERNEL_ARCH KERNEL_OPT AM_CFLAGS CFLAGS AM_CCASFLAGS CCASFLAGS src_libwolfssl_la_OBJECTS ENABLED_CRYPT_TESTS ENABLED_ASM
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SUBDIRS = linuxkm
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endif
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@ -279,6 +279,7 @@ if test "$ENABLED_ASM" = "no"
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then
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AM_CFLAGS="$AM_CFLAGS -DTFM_NO_ASM -DWOLFSSL_NO_ASM"
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fi
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AC_SUBST([ENABLED_ASM])
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# SINGLE THREADED
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@ -10,6 +10,8 @@ ifeq "$(WOLFSSL_CFLAGS)" ""
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$(error $$WOLFSSL_CFLAGS is unset.)
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endif
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WOLFSSL_CFLAGS += -Wframe-larger-than=$(MAX_STACK_FRAME_SIZE) -mpreferred-stack-boundary=4
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obj-m := libwolfssl.o
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WOLFSSL_OBJ_TARGETS=$(patsubst %, $(obj)/%, $(WOLFSSL_OBJ_FILES))
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@ -30,17 +32,42 @@ MAX_STACK_FRAME_SIZE=$(shell echo $$(( $(KERNEL_THREAD_STACK_SIZE) / 4)))
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libwolfssl-y := $(WOLFSSL_OBJ_FILES) linuxkm/module_hooks.o linuxkm/module_exports.o
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ccflags-y = $(WOLFSSL_CFLAGS) -Wframe-larger-than=$(MAX_STACK_FRAME_SIZE) -mpreferred-stack-boundary=4
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ifeq "$(KERNEL_ARCH)" "x86"
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WOLFSSL_CFLAGS_NO_VECTOR_INSNS ::= -mno-sse
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ifeq "$(ENABLED_ASM)" "yes"
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# x86 kernel disables fp and vector insns and register usage with
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# "-mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -mno-80387 -mno-fp-ret-in-387".
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# reenable minimum subset of vector ops needed for compilation,
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# while explicitly disabling auto-vectorization, and leave fp disabled.
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# note that including -mavx here is known to introduce unaccommodated
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# simd register ops, e.g. in integer.c:mp_exch() .
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WOLFSSL_CFLAGS_YES_VECTOR_INSNS ::= -msse -mmmx -fno-builtin -fno-tree-vectorize -fno-tree-loop-vectorize -fno-tree-slp-vectorize
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else
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WOLFSSL_CFLAGS_YES_VECTOR_INSNS ::=
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endif
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else ifeq "$(KERNEL_ARCH)" "arm64"
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WOLFSSL_CFLAGS_NO_VECTOR_INSNS ::=
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WOLFSSL_CFLAGS_YES_VECTOR_INSNS ::=
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# WOLFSSL_CFLAGS_YES_VECTOR_INSNS ::= $AM_CFLAGS -mno-general-regs-only -mno-fpu -fno-tree-vectorize -fno-tree-loop-vectorize -fno-tree-slp-vectorize
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else ifeq "$(KERNEL_ARCH)" "arm"
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WOLFSSL_CFLAGS_NO_VECTOR_INSNS ::=
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WOLFSSL_CFLAGS_YES_VECTOR_INSNS ::=
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# WOLFSSL_CFLAGS_YES_VECTOR_INSNS ::= $AM_CFLAGS -mno-general-regs-only -mno-fpu -fno-tree-vectorize -fno-tree-loop-vectorize -fno-tree-slp-vectorize
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endif
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%/libwolfssl.mod.o: ccflags-y :=
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%/test.o: ccflags-y += -DNO_MAIN_DRIVER
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ccflags-y = $(WOLFSSL_CFLAGS) $(WOLFSSL_CFLAGS_NO_VECTOR_INSNS)
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$(obj)/libwolfssl.mod.o: ccflags-y :=
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$(obj)/wolfcrypt/test/test.o: ccflags-y += -DNO_MAIN_DRIVER
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$(obj)/wolfcrypt/src/aes.o: ccflags-y = $(WOLFSSL_CFLAGS) $(WOLFSSL_CFLAGS_YES_VECTOR_INSNS)
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asflags-y := $(WOLFSSL_ASFLAGS)
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# these two _asms are kernel-compatible (they don't reference the pic-related _GLOBAL_OFFSET_TABLE_)
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# but they still irritate objtool: "unannotated intra-function call" and "BP used as a scratch register"
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%/aes_asm.o: OBJECT_FILES_NON_STANDARD := y
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%/aes_gcm_asm.o: OBJECT_FILES_NON_STANDARD := y
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$(obj)/wolfcrypt/src/aes_asm.o: OBJECT_FILES_NON_STANDARD := y
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$(obj)/wolfcrypt/src/aes_gcm_asm.o: OBJECT_FILES_NON_STANDARD := y
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# auto-generate the exported symbol list, leveraging the WOLFSSL_API visibility tags.
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# exclude symbols that don't match wc_* or wolf*.
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@ -777,6 +777,8 @@ block cipher mechanism that uses n-bit binary string parameter key with 128-bits
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nr = temp_key.rounds;
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aes->rounds = nr;
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SAVE_VECTOR_REGISTERS();
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Key_Schedule[nr] = Temp_Key_Schedule[0];
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Key_Schedule[nr-1] = _mm_aesimc_si128(Temp_Key_Schedule[1]);
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Key_Schedule[nr-2] = _mm_aesimc_si128(Temp_Key_Schedule[2]);
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@ -800,6 +802,8 @@ block cipher mechanism that uses n-bit binary string parameter key with 128-bits
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Key_Schedule[0] = Temp_Key_Schedule[nr];
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RESTORE_VECTOR_REGISTERS();
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return 0;
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}
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#endif /* HAVE_AES_DECRYPT */
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@ -1696,12 +1700,12 @@ static void wc_AesEncrypt(Aes* aes, const byte* inBlock, byte* outBlock)
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tmp_align = tmp + (AESNI_ALIGN - ((size_t)tmp % AESNI_ALIGN));
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XMEMCPY(tmp_align, inBlock, AES_BLOCK_SIZE);
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SAVE_VECTOR_REGISTERS();
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XMEMCPY(tmp_align, inBlock, AES_BLOCK_SIZE);
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AES_ECB_encrypt(tmp_align, tmp_align, AES_BLOCK_SIZE,
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(byte*)aes->key, aes->rounds);
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RESTORE_VECTOR_REGISTERS();
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XMEMCPY(outBlock, tmp_align, AES_BLOCK_SIZE);
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RESTORE_VECTOR_REGISTERS();
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XFREE(tmp, aes->heap, DYNAMIC_TYPE_TMP_BUFFER);
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return;
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#else
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@ -1995,9 +1999,9 @@ static void wc_AesDecrypt(Aes* aes, const byte* inBlock, byte* outBlock)
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#endif
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/* if input and output same will overwrite input iv */
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SAVE_VECTOR_REGISTERS();
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if ((const byte*)aes->tmp != inBlock)
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XMEMCPY(aes->tmp, inBlock, AES_BLOCK_SIZE);
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SAVE_VECTOR_REGISTERS();
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AES_ECB_decrypt(inBlock, outBlock, AES_BLOCK_SIZE, (byte*)aes->key,
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aes->rounds);
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RESTORE_VECTOR_REGISTERS();
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@ -7268,15 +7272,17 @@ int wc_AesCcmEncrypt(Aes* aes, byte* out, const byte* in, word32 inSz,
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#ifdef WOLFSSL_AESNI
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if (haveAESNI && aes->use_aesni) {
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while (inSz >= AES_BLOCK_SIZE * 4) {
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SAVE_VECTOR_REGISTERS();
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AesCcmCtrIncSet4(B, lenSz);
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SAVE_VECTOR_REGISTERS();
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AES_ECB_encrypt(B, A, AES_BLOCK_SIZE * 4, (byte*)aes->key,
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aes->rounds);
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RESTORE_VECTOR_REGISTERS();
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xorbuf(A, in, AES_BLOCK_SIZE * 4);
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XMEMCPY(out, A, AES_BLOCK_SIZE * 4);
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RESTORE_VECTOR_REGISTERS();
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inSz -= AES_BLOCK_SIZE * 4;
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in += AES_BLOCK_SIZE * 4;
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out += AES_BLOCK_SIZE * 4;
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@ -7352,15 +7358,18 @@ int wc_AesCcmDecrypt(Aes* aes, byte* out, const byte* in, word32 inSz,
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#ifdef WOLFSSL_AESNI
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if (haveAESNI && aes->use_aesni) {
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while (oSz >= AES_BLOCK_SIZE * 4) {
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SAVE_VECTOR_REGISTERS();
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AesCcmCtrIncSet4(B, lenSz);
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SAVE_VECTOR_REGISTERS();
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AES_ECB_encrypt(B, A, AES_BLOCK_SIZE * 4, (byte*)aes->key,
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aes->rounds);
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RESTORE_VECTOR_REGISTERS();
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xorbuf(A, in, AES_BLOCK_SIZE * 4);
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XMEMCPY(o, A, AES_BLOCK_SIZE * 4);
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RESTORE_VECTOR_REGISTERS();
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oSz -= AES_BLOCK_SIZE * 4;
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in += AES_BLOCK_SIZE * 4;
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o += AES_BLOCK_SIZE * 4;
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@ -88,7 +88,13 @@
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#endif
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#include <linux/net.h>
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#include <linux/slab.h>
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#if defined(WOLFSSL_AESNI) || defined(USE_INTEL_SPEEDUP) || defined(WOLFSSL_ARMASM)
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#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0)
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#include <asm/i387.h>
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#else
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#include <asm/simd.h>
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#endif
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#endif
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_Pragma("GCC diagnostic pop");
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/* remove this multifariously conflicting macro, picked up from
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