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commit 6bb6c8a65a341a67bd059ec6e1c805813eb17264
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Author: Mark Wielaard <mark@klomp.org>
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Date: Tue Jun 19 18:00:45 2018 +0200
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Mask AT_HWCAPS on arm64 to those instructions VEX implements.
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This patch makes sure that the process running under valgrind only sees
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the AES, PMULL, SHA1, SHA2, CRC32, FP, and ASIMD features in auxv AT_HWCAPS.
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https://bugs.kde.org/show_bug.cgi?id=381556
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diff --git a/coregrind/m_initimg/initimg-linux.c b/coregrind/m_initimg/initimg-linux.c
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index 30e1f85..61cc458 100644
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--- a/coregrind/m_initimg/initimg-linux.c
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+++ b/coregrind/m_initimg/initimg-linux.c
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@@ -703,6 +703,19 @@ Addr setup_client_stack( void* init_sp,
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(and anything above) are not supported by Valgrind. */
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auxv->u.a_val &= VKI_HWCAP_S390_TE - 1;
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}
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+# elif defined(VGP_arm64_linux)
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+ {
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+ /* Limit the AT_HWCAP to just those features we explicitly
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+ support in VEX. */
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+#define ARM64_SUPPORTED_HWCAP (VKI_HWCAP_AES \
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+ | VKI_HWCAP_PMULL \
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+ | VKI_HWCAP_SHA1 \
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+ | VKI_HWCAP_SHA2 \
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+ | VKI_HWCAP_CRC32 \
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+ | VKI_HWCAP_FP \
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+ | VKI_HWCAP_ASIMD)
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+ auxv->u.a_val &= ARM64_SUPPORTED_HWCAP;
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+ }
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# endif
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break;
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# if defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux)
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diff --git a/include/vki/vki-arm64-linux.h b/include/vki/vki-arm64-linux.h
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index af6b435..54b0428 100644
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--- a/include/vki/vki-arm64-linux.h
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+++ b/include/vki/vki-arm64-linux.h
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@@ -692,6 +692,39 @@ struct vki_shminfo64 {
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#define VKI_TIOCSSERIAL 0x541F
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//----------------------------------------------------------------------
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+// From linux-4.17/include/uapi/asm-generic/ioctls.h
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+//----------------------------------------------------------------------
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+
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+#define VKI_HWCAP_FP (1 << 0)
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+#define VKI_HWCAP_ASIMD (1 << 1)
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+#define VKI_HWCAP_EVTSTRM (1 << 2)
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+#define VKI_HWCAP_AES (1 << 3)
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+#define VKI_HWCAP_PMULL (1 << 4)
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+#define VKI_HWCAP_SHA1 (1 << 5)
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+#define VKI_HWCAP_SHA2 (1 << 6)
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+#define VKI_HWCAP_CRC32 (1 << 7)
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+#define VKI_HWCAP_ATOMICS (1 << 8)
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+#define VKI_HWCAP_FPHP (1 << 9)
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+#define VKI_HWCAP_ASIMDHP (1 << 10)
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+#define VKI_HWCAP_CPUID (1 << 11)
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+#define VKI_HWCAP_ASIMDRDM (1 << 12)
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+#define VKI_HWCAP_JSCVT (1 << 13)
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+#define VKI_HWCAP_FCMA (1 << 14)
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+#define VKI_HWCAP_LRCPC (1 << 15)
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+#define VKI_HWCAP_DCPOP (1 << 16)
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+#define VKI_HWCAP_SHA3 (1 << 17)
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+#define VKI_HWCAP_SM3 (1 << 18)
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+#define VKI_HWCAP_SM4 (1 << 19)
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+#define VKI_HWCAP_ASIMDDP (1 << 20)
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+#define VKI_HWCAP_SHA512 (1 << 21)
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+#define VKI_HWCAP_SVE (1 << 22)
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+#define VKI_HWCAP_ASIMDFHM (1 << 23)
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+#define VKI_HWCAP_DIT (1 << 24)
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+#define VKI_HWCAP_USCAT (1 << 25)
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+#define VKI_HWCAP_ILRCPC (1 << 26)
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+#define VKI_HWCAP_FLAGM (1 << 27)
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+
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+//----------------------------------------------------------------------
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// And that's it!
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//----------------------------------------------------------------------
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