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119 lines
3.3 KiB
C++
119 lines
3.3 KiB
C++
//===-- trusty.cpp ---------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "platform.h"
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#if SCUDO_TRUSTY
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#include "common.h"
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#include "mutex.h"
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#include "report_linux.h"
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#include "trusty.h"
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#include <errno.h> // for errno
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#include <lk/err_ptr.h> // for PTR_ERR and IS_ERR
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#include <stdio.h> // for printf()
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#include <stdlib.h> // for getenv()
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#include <sys/auxv.h> // for getauxval()
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#include <time.h> // for clock_gettime()
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#include <trusty_err.h> // for lk_err_to_errno()
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#include <trusty_syscalls.h> // for _trusty_brk()
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#include <uapi/mm.h> // for MMAP flags
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namespace scudo {
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uptr getPageSize() { return getauxval(AT_PAGESZ); }
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void NORETURN die() { abort(); }
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void *map(void *Addr, uptr Size, const char *Name, uptr Flags,
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UNUSED MapPlatformData *Data) {
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uint32_t MmapFlags =
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MMAP_FLAG_ANONYMOUS | MMAP_FLAG_PROT_READ | MMAP_FLAG_PROT_WRITE;
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// If the MAP_NOACCESS flag is set, Scudo tries to reserve
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// a memory region without mapping physical pages. This corresponds
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// to MMAP_FLAG_NO_PHYSICAL in Trusty.
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if (Flags & MAP_NOACCESS)
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MmapFlags |= MMAP_FLAG_NO_PHYSICAL;
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if (Addr)
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MmapFlags |= MMAP_FLAG_FIXED_NOREPLACE;
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if (Flags & MAP_MEMTAG)
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MmapFlags |= MMAP_FLAG_PROT_MTE;
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void *P = (void *)_trusty_mmap(Addr, Size, MmapFlags, 0);
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if (IS_ERR(P)) {
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errno = lk_err_to_errno(PTR_ERR(P));
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if (!(Flags & MAP_ALLOWNOMEM) || errno != ENOMEM)
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reportMapError(Size);
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return nullptr;
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}
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return P;
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}
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void unmap(UNUSED void *Addr, UNUSED uptr Size, UNUSED uptr Flags,
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UNUSED MapPlatformData *Data) {
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if (_trusty_munmap(Addr, Size) != 0)
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reportUnmapError(reinterpret_cast<uptr>(Addr), Size);
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}
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void setMemoryPermission(UNUSED uptr Addr, UNUSED uptr Size, UNUSED uptr Flags,
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UNUSED MapPlatformData *Data) {}
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void releasePagesToOS(UNUSED uptr BaseAddress, UNUSED uptr Offset,
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UNUSED uptr Size, UNUSED MapPlatformData *Data) {}
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const char *getEnv(const char *Name) { return getenv(Name); }
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// All mutex operations are a no-op since Trusty doesn't currently support
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// threads.
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bool HybridMutex::tryLock() { return true; }
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void HybridMutex::lockSlow() {}
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void HybridMutex::unlock() {}
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void HybridMutex::assertHeldImpl() {}
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u64 getMonotonicTime() {
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timespec TS;
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clock_gettime(CLOCK_MONOTONIC, &TS);
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return static_cast<u64>(TS.tv_sec) * (1000ULL * 1000 * 1000) +
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static_cast<u64>(TS.tv_nsec);
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}
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u64 getMonotonicTimeFast() {
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#if defined(CLOCK_MONOTONIC_COARSE)
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timespec TS;
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clock_gettime(CLOCK_MONOTONIC_COARSE, &TS);
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return static_cast<u64>(TS.tv_sec) * (1000ULL * 1000 * 1000) +
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static_cast<u64>(TS.tv_nsec);
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#else
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return getMonotonicTime();
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#endif
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}
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u32 getNumberOfCPUs() { return 0; }
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u32 getThreadID() { return 0; }
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bool getRandom(UNUSED void *Buffer, UNUSED uptr Length, UNUSED bool Blocking) {
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return false;
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}
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void outputRaw(const char *Buffer) { printf("%s", Buffer); }
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void setAbortMessage(UNUSED const char *Message) {}
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} // namespace scudo
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#endif // SCUDO_TRUSTY
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