5de6f3c0f4
Update our copy of libvixl to upstream's 1.12 release. The major benefit from QEMU's point of view is that some instructions previously disassembled as "unimplemented (System)" are now displayed as something more useful. It also fixes some warnings about format strings that newer w64-mingw32 compilers were emitting. We didn't have any local changes to libvixl so nothing needed to be forward-ported. Although this is a large commit (due to upstream renaming most of the files), only a few of the files changed in this commit are not just straight copies of upstream libvixl files: disas/arm-a64.cc disas/libvixl/Makefile.objs disas/libvixl/README Note that this commit introduces some signed-unsigned comparison warnings on the old mingw compilers. Those compilers have broken TLS support anyway so have only ever been much use for compile tests; anybody still using them should add -Wno-sign-compare to their --extra-cflags. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
114 lines
3.7 KiB
C++
114 lines
3.7 KiB
C++
// Copyright 2014, ARM Limited
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright notice,
|
|
// this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above copyright notice,
|
|
// this list of conditions and the following disclaimer in the documentation
|
|
// and/or other materials provided with the distribution.
|
|
// * Neither the name of ARM Limited nor the names of its contributors may be
|
|
// used to endorse or promote products derived from this software without
|
|
// specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
|
|
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
|
|
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
#ifndef VIXL_CODE_BUFFER_H
|
|
#define VIXL_CODE_BUFFER_H
|
|
|
|
#include <string.h>
|
|
#include "vixl/globals.h"
|
|
|
|
namespace vixl {
|
|
|
|
class CodeBuffer {
|
|
public:
|
|
explicit CodeBuffer(size_t capacity = 4 * KBytes);
|
|
CodeBuffer(void* buffer, size_t capacity);
|
|
~CodeBuffer();
|
|
|
|
void Reset();
|
|
|
|
ptrdiff_t OffsetFrom(ptrdiff_t offset) const {
|
|
ptrdiff_t cursor_offset = cursor_ - buffer_;
|
|
VIXL_ASSERT((offset >= 0) && (offset <= cursor_offset));
|
|
return cursor_offset - offset;
|
|
}
|
|
|
|
ptrdiff_t CursorOffset() const {
|
|
return OffsetFrom(0);
|
|
}
|
|
|
|
template <typename T>
|
|
T GetOffsetAddress(ptrdiff_t offset) const {
|
|
VIXL_ASSERT((offset >= 0) && (offset <= (cursor_ - buffer_)));
|
|
return reinterpret_cast<T>(buffer_ + offset);
|
|
}
|
|
|
|
size_t RemainingBytes() const {
|
|
VIXL_ASSERT((cursor_ >= buffer_) && (cursor_ <= (buffer_ + capacity_)));
|
|
return (buffer_ + capacity_) - cursor_;
|
|
}
|
|
|
|
// A code buffer can emit:
|
|
// * 32-bit data: instruction and constant.
|
|
// * 64-bit data: constant.
|
|
// * string: debug info.
|
|
void Emit32(uint32_t data) { Emit(data); }
|
|
|
|
void Emit64(uint64_t data) { Emit(data); }
|
|
|
|
void EmitString(const char* string);
|
|
|
|
// Align to kInstructionSize.
|
|
void Align();
|
|
|
|
size_t capacity() const { return capacity_; }
|
|
|
|
bool IsManaged() const { return managed_; }
|
|
|
|
void Grow(size_t new_capacity);
|
|
|
|
bool IsDirty() const { return dirty_; }
|
|
|
|
void SetClean() { dirty_ = false; }
|
|
|
|
private:
|
|
template <typename T>
|
|
void Emit(T value) {
|
|
VIXL_ASSERT(RemainingBytes() >= sizeof(value));
|
|
dirty_ = true;
|
|
memcpy(cursor_, &value, sizeof(value));
|
|
cursor_ += sizeof(value);
|
|
}
|
|
|
|
// Backing store of the buffer.
|
|
byte* buffer_;
|
|
// If true the backing store is allocated and deallocated by the buffer. The
|
|
// backing store can then grow on demand. If false the backing store is
|
|
// provided by the user and cannot be resized internally.
|
|
bool managed_;
|
|
// Pointer to the next location to be written.
|
|
byte* cursor_;
|
|
// True if there has been any write since the buffer was created or cleaned.
|
|
bool dirty_;
|
|
// Capacity in bytes of the backing store.
|
|
size_t capacity_;
|
|
};
|
|
|
|
} // namespace vixl
|
|
|
|
#endif // VIXL_CODE_BUFFER_H
|
|
|