101 lines
3.0 KiB
C++
101 lines
3.0 KiB
C++
//===-- trusty.cpp ---------------------------------------------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "platform.h"
|
|
|
|
#if SCUDO_TRUSTY
|
|
|
|
#include "common.h"
|
|
#include "mutex.h"
|
|
#include "string_utils.h"
|
|
#include "trusty.h"
|
|
|
|
#include <errno.h> // for errno
|
|
#include <stdio.h> // for printf()
|
|
#include <stdlib.h> // for getenv()
|
|
#include <sys/auxv.h> // for getauxval()
|
|
#include <time.h> // for clock_gettime()
|
|
#include <trusty_syscalls.h> // for _trusty_brk()
|
|
|
|
#define SBRK_ALIGN 32
|
|
|
|
namespace scudo {
|
|
|
|
uptr getPageSize() { return getauxval(AT_PAGESZ); }
|
|
|
|
void NORETURN die() { abort(); }
|
|
|
|
void *map(UNUSED void *Addr, uptr Size, UNUSED const char *Name, uptr Flags,
|
|
UNUSED MapPlatformData *Data) {
|
|
// Calling _trusty_brk(0) returns the current program break.
|
|
uptr ProgramBreak = reinterpret_cast<uptr>(_trusty_brk(0));
|
|
uptr Start;
|
|
uptr End;
|
|
|
|
Start = roundUpTo(ProgramBreak, SBRK_ALIGN);
|
|
// Don't actually extend the heap if MAP_NOACCESS flag is set since this is
|
|
// the case where Scudo tries to reserve a memory region without mapping
|
|
// physical pages.
|
|
if (Flags & MAP_NOACCESS)
|
|
return reinterpret_cast<void *>(Start);
|
|
|
|
// Attempt to extend the heap by Size bytes using _trusty_brk.
|
|
End = roundUpTo(Start + Size, SBRK_ALIGN);
|
|
ProgramBreak =
|
|
reinterpret_cast<uptr>(_trusty_brk(reinterpret_cast<void *>(End)));
|
|
if (ProgramBreak < End) {
|
|
errno = ENOMEM;
|
|
dieOnMapUnmapError(Size);
|
|
return nullptr;
|
|
}
|
|
return reinterpret_cast<void *>(Start); // Base of new reserved region.
|
|
}
|
|
|
|
// Unmap is a no-op since Trusty uses sbrk instead of memory mapping.
|
|
void unmap(UNUSED void *Addr, UNUSED uptr Size, UNUSED uptr Flags,
|
|
UNUSED MapPlatformData *Data) {}
|
|
|
|
void setMemoryPermission(UNUSED uptr Addr, UNUSED uptr Size, UNUSED uptr Flags,
|
|
UNUSED MapPlatformData *Data) {}
|
|
|
|
void releasePagesToOS(UNUSED uptr BaseAddress, UNUSED uptr Offset,
|
|
UNUSED uptr Size, UNUSED MapPlatformData *Data) {}
|
|
|
|
const char *getEnv(const char *Name) { return getenv(Name); }
|
|
|
|
// All mutex operations are a no-op since Trusty doesn't currently support
|
|
// threads.
|
|
bool HybridMutex::tryLock() { return true; }
|
|
|
|
void HybridMutex::lockSlow() {}
|
|
|
|
void HybridMutex::unlock() {}
|
|
|
|
u64 getMonotonicTime() {
|
|
timespec TS;
|
|
clock_gettime(CLOCK_MONOTONIC, &TS);
|
|
return static_cast<u64>(TS.tv_sec) * (1000ULL * 1000 * 1000) +
|
|
static_cast<u64>(TS.tv_nsec);
|
|
}
|
|
|
|
u32 getNumberOfCPUs() { return 0; }
|
|
|
|
u32 getThreadID() { return 0; }
|
|
|
|
bool getRandom(UNUSED void *Buffer, UNUSED uptr Length, UNUSED bool Blocking) {
|
|
return false;
|
|
}
|
|
|
|
void outputRaw(const char *Buffer) { printf("%s", Buffer); }
|
|
|
|
void setAbortMessage(UNUSED const char *Message) {}
|
|
|
|
} // namespace scudo
|
|
|
|
#endif // SCUDO_TRUSTY
|