03d89a7068
We can't have HWASAN enabled in these resolvers because they may be called before HWASAN is initialized. We were previously getting away with HWASAN being enabled on these functions because ANDROID_EXPERIMENTAL_MTE was not defined, which let the compiler simplify away any HWASAN instrumentation in the resolvers. But with this build flag enabled (which is currently the case in FVP, and eventually everywhere once the MTE kernel patches land) the resolvers end up containing an HWASAN instrumented load of the _hwcap2 field. Bug: 135772972 Change-Id: Iac79d02ddc81630c955e107eb7f78389aeb33879
58 lines
2.2 KiB
C
58 lines
2.2 KiB
C
/*
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* Copyright (C) 2019 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#pragma once
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#include <stdint.h>
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#include <sys/ifunc.h>
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#if defined(__aarch64__)
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#define IFUNC_ARGS (uint64_t hwcap __attribute__((unused)), \
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__ifunc_arg_t* arg __attribute__((unused)))
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#elif defined(__arm__)
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#define IFUNC_ARGS (unsigned long hwcap __attribute__((unused)))
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#else
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#define IFUNC_ARGS ()
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#endif
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// We can't have HWASAN enabled in resolvers because they may be called before HWASAN is
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// initialized.
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#define DEFINE_IFUNC_FOR(name) \
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name##_func name __attribute__((ifunc(#name "_resolver"))); \
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__attribute__((visibility("hidden"))) \
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__attribute__((no_sanitize("hwaddress"))) \
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name##_func* name##_resolver IFUNC_ARGS
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#define DECLARE_FUNC(type, name) \
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__attribute__((visibility("hidden"))) \
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type name
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#define RETURN_FUNC(type, name) { \
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DECLARE_FUNC(type, name); \
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return name; \
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}
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