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Merge pull request #9848 from solardiz/mbedtls-3.6

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[Backport 3.6] Specify previously missed register clobbers in AES-NI asm blocks
This commit is contained in:
Paul Elliott
2024-12-13 15:26:06 +00:00
committed by GitHub
parent cd40fa1f09 cbf5df5d54
commit f1e78f28ea
2 changed files with 9 additions and 4 deletions
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5
ChangeLog.d/fix-aesni-asm-clobbers.txt Normal file
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@@ -0,0 +1,5 @@
Bugfix
* Fix missing constraints on the AES-NI inline assembly which is used on
GCC-like compilers when building AES for generic x86_64 targets. This
may have resulted in incorrect code with some compilers, depending on
optimizations. Fixes #9819.

8
library/aesni.c
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@@ -489,7 +489,7 @@ int mbedtls_aesni_crypt_ecb(mbedtls_aes_context *ctx,
"movdqu %%xmm0, (%4) \n\t" // export output
:
: "r" (ctx->nr), "r" (ctx->buf + ctx->rk_offset), "r" (mode), "r" (input), "r" (output)
: "memory", "cc", "xmm0", "xmm1");
: "memory", "cc", "xmm0", "xmm1", "0", "1");
return 0;
@@ -679,7 +679,7 @@ static void aesni_setkey_enc_128(unsigned char *rk,
AESKEYGENA(xmm0_xmm1, "0x36") "call 1b \n\t"
:
: "r" (rk), "r" (key)
: "memory", "cc", "0");
: "memory", "cc", "xmm0", "xmm1", "0");
}
/*
@@ -737,7 +737,7 @@ static void aesni_setkey_enc_192(unsigned char *rk,
:
: "r" (rk), "r" (key)
: "memory", "cc", "0");
: "memory", "cc", "xmm0", "xmm1", "xmm2", "0");
}
#endif /* !MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH */
@@ -805,7 +805,7 @@ static void aesni_setkey_enc_256(unsigned char *rk,
AESKEYGENA(xmm1_xmm2, "0x40") "call 1b \n\t"
:
: "r" (rk), "r" (key)
: "memory", "cc", "0");
: "memory", "cc", "xmm0", "xmm1", "xmm2", "0");
}
#endif /* !MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH */