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disas/libvixl: Update to upstream VIXL 1.5
Update our copy of libvixl to upstream's 1.5 release.
This includes the upstream versions of the fixes we
were carrying locally (commit ffebe899).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1407162987-4659-1-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell
parent
d9aa688557
commit
508280f566
@ -2,7 +2,7 @@
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The code in this directory is a subset of libvixl:
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https://github.com/armvixl/vixl
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(specifically, it is the set of files needed for disassembly only,
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taken from libvixl 1.4).
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taken from libvixl 1.5).
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Bugfixes should preferably be sent upstream initially.
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The disassembler does not currently support the entire A64 instruction
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@ -28,6 +28,7 @@
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#define VIXL_A64_ASSEMBLER_A64_H_
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#include <list>
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#include <stack>
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#include "globals.h"
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#include "utils.h"
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@ -574,34 +575,107 @@ class MemOperand {
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class Label {
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public:
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Label() : is_bound_(false), link_(NULL), target_(NULL) {}
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Label() : location_(kLocationUnbound) {}
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~Label() {
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// If the label has been linked to, it needs to be bound to a target.
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VIXL_ASSERT(!IsLinked() || IsBound());
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}
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inline Instruction* link() const { return link_; }
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inline Instruction* target() const { return target_; }
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inline bool IsBound() const { return is_bound_; }
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inline bool IsLinked() const { return link_ != NULL; }
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inline void set_link(Instruction* new_link) { link_ = new_link; }
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static const int kEndOfChain = 0;
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inline bool IsBound() const { return location_ >= 0; }
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inline bool IsLinked() const { return !links_.empty(); }
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private:
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// Indicates if the label has been bound, ie its location is fixed.
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bool is_bound_;
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// Branches instructions branching to this label form a chained list, with
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// their offset indicating where the next instruction is located.
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// link_ points to the latest branch instruction generated branching to this
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// branch.
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// If link_ is not NULL, the label has been linked to.
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Instruction* link_;
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// The label location.
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Instruction* target_;
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// The list of linked instructions is stored in a stack-like structure. We
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// don't use std::stack directly because it's slow for the common case where
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// only one or two instructions refer to a label, and labels themselves are
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// short-lived. This class behaves like std::stack, but the first few links
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// are preallocated (configured by kPreallocatedLinks).
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//
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// If more than N links are required, this falls back to std::stack.
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class LinksStack {
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public:
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LinksStack() : size_(0), links_extended_(NULL) {}
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~LinksStack() {
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delete links_extended_;
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}
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size_t size() const {
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return size_;
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}
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bool empty() const {
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return size_ == 0;
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}
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void push(ptrdiff_t value) {
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if (size_ < kPreallocatedLinks) {
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links_[size_] = value;
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} else {
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if (links_extended_ == NULL) {
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links_extended_ = new std::stack<ptrdiff_t>();
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}
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VIXL_ASSERT(size_ == (links_extended_->size() + kPreallocatedLinks));
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links_extended_->push(value);
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}
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size_++;
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}
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ptrdiff_t top() const {
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return (size_ <= kPreallocatedLinks) ? links_[size_ - 1]
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: links_extended_->top();
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}
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void pop() {
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size_--;
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if (size_ >= kPreallocatedLinks) {
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links_extended_->pop();
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VIXL_ASSERT(size_ == (links_extended_->size() + kPreallocatedLinks));
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}
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}
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private:
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static const size_t kPreallocatedLinks = 4;
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size_t size_;
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ptrdiff_t links_[kPreallocatedLinks];
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std::stack<ptrdiff_t> * links_extended_;
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};
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inline ptrdiff_t location() const { return location_; }
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inline void Bind(ptrdiff_t location) {
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// Labels can only be bound once.
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VIXL_ASSERT(!IsBound());
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location_ = location;
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}
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inline void AddLink(ptrdiff_t instruction) {
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// If a label is bound, the assembler already has the information it needs
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// to write the instruction, so there is no need to add it to links_.
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VIXL_ASSERT(!IsBound());
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links_.push(instruction);
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}
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inline ptrdiff_t GetAndRemoveNextLink() {
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VIXL_ASSERT(IsLinked());
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ptrdiff_t link = links_.top();
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links_.pop();
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return link;
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}
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// The offsets of the instructions that have linked to this label.
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LinksStack links_;
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// The label location.
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ptrdiff_t location_;
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static const ptrdiff_t kLocationUnbound = -1;
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// It is not safe to copy labels, so disable the copy constructor by declaring
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// it private (without an implementation).
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Label(const Label&);
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// The Assembler class is responsible for binding and linking labels, since
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// the stored offsets need to be consistent with the Assembler's buffer.
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friend class Assembler;
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};
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@ -635,10 +709,49 @@ class Literal {
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};
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// Control whether or not position-independent code should be emitted.
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enum PositionIndependentCodeOption {
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// All code generated will be position-independent; all branches and
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// references to labels generated with the Label class will use PC-relative
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// addressing.
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PositionIndependentCode,
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// Allow VIXL to generate code that refers to absolute addresses. With this
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// option, it will not be possible to copy the code buffer and run it from a
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// different address; code must be generated in its final location.
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PositionDependentCode,
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// Allow VIXL to assume that the bottom 12 bits of the address will be
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// constant, but that the top 48 bits may change. This allows `adrp` to
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// function in systems which copy code between pages, but otherwise maintain
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// 4KB page alignment.
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PageOffsetDependentCode
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};
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// Control how scaled- and unscaled-offset loads and stores are generated.
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enum LoadStoreScalingOption {
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// Prefer scaled-immediate-offset instructions, but emit unscaled-offset,
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// register-offset, pre-index or post-index instructions if necessary.
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PreferScaledOffset,
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// Prefer unscaled-immediate-offset instructions, but emit scaled-offset,
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// register-offset, pre-index or post-index instructions if necessary.
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PreferUnscaledOffset,
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// Require scaled-immediate-offset instructions.
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RequireScaledOffset,
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// Require unscaled-immediate-offset instructions.
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RequireUnscaledOffset
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};
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// Assembler.
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class Assembler {
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public:
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Assembler(byte* buffer, unsigned buffer_size);
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Assembler(byte* buffer, unsigned buffer_size,
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PositionIndependentCodeOption pic = PositionIndependentCode);
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// The destructor asserts that one of the following is true:
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// * The Assembler object has not been used.
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@ -662,12 +775,15 @@ class Assembler {
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// Label.
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// Bind a label to the current PC.
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void bind(Label* label);
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int UpdateAndGetByteOffsetTo(Label* label);
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inline int UpdateAndGetInstructionOffsetTo(Label* label) {
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VIXL_ASSERT(Label::kEndOfChain == 0);
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return UpdateAndGetByteOffsetTo(label) >> kInstructionSizeLog2;
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}
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// Return the address of a bound label.
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template <typename T>
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inline T GetLabelAddress(const Label * label) {
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VIXL_ASSERT(label->IsBound());
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VIXL_STATIC_ASSERT(sizeof(T) >= sizeof(uintptr_t));
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VIXL_STATIC_ASSERT(sizeof(*buffer_) == 1);
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return reinterpret_cast<T>(buffer_ + label->location());
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}
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// Instruction set functions.
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@ -733,6 +849,12 @@ class Assembler {
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// Calculate the address of a PC offset.
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void adr(const Register& rd, int imm21);
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// Calculate the page address of a label.
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void adrp(const Register& rd, Label* label);
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// Calculate the page address of a PC offset.
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void adrp(const Register& rd, int imm21);
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// Data Processing instructions.
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// Add.
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void add(const Register& rd,
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@ -1112,31 +1234,76 @@ class Assembler {
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// Memory instructions.
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// Load integer or FP register.
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void ldr(const CPURegister& rt, const MemOperand& src);
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void ldr(const CPURegister& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferScaledOffset);
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// Store integer or FP register.
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void str(const CPURegister& rt, const MemOperand& dst);
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void str(const CPURegister& rt, const MemOperand& dst,
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LoadStoreScalingOption option = PreferScaledOffset);
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// Load word with sign extension.
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void ldrsw(const Register& rt, const MemOperand& src);
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void ldrsw(const Register& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferScaledOffset);
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// Load byte.
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void ldrb(const Register& rt, const MemOperand& src);
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void ldrb(const Register& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferScaledOffset);
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// Store byte.
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void strb(const Register& rt, const MemOperand& dst);
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void strb(const Register& rt, const MemOperand& dst,
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LoadStoreScalingOption option = PreferScaledOffset);
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// Load byte with sign extension.
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void ldrsb(const Register& rt, const MemOperand& src);
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void ldrsb(const Register& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferScaledOffset);
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// Load half-word.
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void ldrh(const Register& rt, const MemOperand& src);
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void ldrh(const Register& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferScaledOffset);
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// Store half-word.
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void strh(const Register& rt, const MemOperand& dst);
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void strh(const Register& rt, const MemOperand& dst,
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LoadStoreScalingOption option = PreferScaledOffset);
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// Load half-word with sign extension.
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void ldrsh(const Register& rt, const MemOperand& src);
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void ldrsh(const Register& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferScaledOffset);
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// Load integer or FP register (with unscaled offset).
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void ldur(const CPURegister& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferUnscaledOffset);
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// Store integer or FP register (with unscaled offset).
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void stur(const CPURegister& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferUnscaledOffset);
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// Load word with sign extension.
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void ldursw(const Register& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferUnscaledOffset);
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// Load byte (with unscaled offset).
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void ldurb(const Register& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferUnscaledOffset);
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// Store byte (with unscaled offset).
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void sturb(const Register& rt, const MemOperand& dst,
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LoadStoreScalingOption option = PreferUnscaledOffset);
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// Load byte with sign extension (and unscaled offset).
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void ldursb(const Register& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferUnscaledOffset);
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// Load half-word (with unscaled offset).
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void ldurh(const Register& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferUnscaledOffset);
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// Store half-word (with unscaled offset).
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void sturh(const Register& rt, const MemOperand& dst,
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LoadStoreScalingOption option = PreferUnscaledOffset);
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// Load half-word with sign extension (and unscaled offset).
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void ldursh(const Register& rt, const MemOperand& src,
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LoadStoreScalingOption option = PreferUnscaledOffset);
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// Load integer or FP register pair.
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void ldp(const CPURegister& rt, const CPURegister& rt2,
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@ -1166,6 +1333,79 @@ class Assembler {
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// Load single precision floating point literal to FP register.
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void ldr(const FPRegister& ft, float imm);
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// Store exclusive byte.
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void stxrb(const Register& rs, const Register& rt, const MemOperand& dst);
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// Store exclusive half-word.
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void stxrh(const Register& rs, const Register& rt, const MemOperand& dst);
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// Store exclusive register.
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void stxr(const Register& rs, const Register& rt, const MemOperand& dst);
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// Load exclusive byte.
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void ldxrb(const Register& rt, const MemOperand& src);
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// Load exclusive half-word.
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void ldxrh(const Register& rt, const MemOperand& src);
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// Load exclusive register.
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void ldxr(const Register& rt, const MemOperand& src);
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// Store exclusive register pair.
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void stxp(const Register& rs,
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const Register& rt,
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const Register& rt2,
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const MemOperand& dst);
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// Load exclusive register pair.
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void ldxp(const Register& rt, const Register& rt2, const MemOperand& src);
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// Store-release exclusive byte.
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void stlxrb(const Register& rs, const Register& rt, const MemOperand& dst);
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// Store-release exclusive half-word.
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void stlxrh(const Register& rs, const Register& rt, const MemOperand& dst);
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// Store-release exclusive register.
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void stlxr(const Register& rs, const Register& rt, const MemOperand& dst);
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// Load-acquire exclusive byte.
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void ldaxrb(const Register& rt, const MemOperand& src);
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// Load-acquire exclusive half-word.
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void ldaxrh(const Register& rt, const MemOperand& src);
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// Load-acquire exclusive register.
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void ldaxr(const Register& rt, const MemOperand& src);
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// Store-release exclusive register pair.
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void stlxp(const Register& rs,
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const Register& rt,
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const Register& rt2,
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const MemOperand& dst);
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// Load-acquire exclusive register pair.
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void ldaxp(const Register& rt, const Register& rt2, const MemOperand& src);
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// Store-release byte.
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void stlrb(const Register& rt, const MemOperand& dst);
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// Store-release half-word.
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void stlrh(const Register& rt, const MemOperand& dst);
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// Store-release register.
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void stlr(const Register& rt, const MemOperand& dst);
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// Load-acquire byte.
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void ldarb(const Register& rt, const MemOperand& src);
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// Load-acquire half-word.
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void ldarh(const Register& rt, const MemOperand& src);
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// Load-acquire register.
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void ldar(const Register& rt, const MemOperand& src);
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// Move instructions. The default shift of -1 indicates that the move
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// instruction will calculate an appropriate 16-bit immediate and left shift
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// that is equal to the 64-bit immediate argument. If an explicit left shift
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@ -1214,6 +1454,9 @@ class Assembler {
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// System hint.
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void hint(SystemHint code);
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// Clear exclusive monitor.
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void clrex(int imm4 = 0xf);
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// Data memory barrier.
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void dmb(BarrierDomain domain, BarrierType type);
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@ -1429,6 +1672,11 @@ class Assembler {
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return rt2.code() << Rt2_offset;
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}
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static Instr Rs(CPURegister rs) {
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VIXL_ASSERT(rs.code() != kSPRegInternalCode);
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return rs.code() << Rs_offset;
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}
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// These encoding functions allow the stack pointer to be encoded, and
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// disallow the zero register.
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||||
static Instr RdSP(Register rd) {
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@ -1619,6 +1867,11 @@ class Assembler {
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return imm7 << ImmHint_offset;
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}
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static Instr CRm(int imm4) {
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VIXL_ASSERT(is_uint4(imm4));
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return imm4 << CRm_offset;
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}
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||||
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static Instr ImmBarrierDomain(int imm2) {
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VIXL_ASSERT(is_uint2(imm2));
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return imm2 << ImmBarrierDomain_offset;
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@ -1660,16 +1913,20 @@ class Assembler {
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||||
}
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||||
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// Size of the code generated in bytes
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||||
uint64_t SizeOfCodeGenerated() const {
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size_t SizeOfCodeGenerated() const {
|
||||
VIXL_ASSERT((pc_ >= buffer_) && (pc_ < (buffer_ + buffer_size_)));
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return pc_ - buffer_;
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||||
}
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||||
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||||
// Size of the code generated since label to the current position.
|
||||
uint64_t SizeOfCodeGeneratedSince(Label* label) const {
|
||||
size_t SizeOfCodeGeneratedSince(Label* label) const {
|
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size_t pc_offset = SizeOfCodeGenerated();
|
||||
|
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VIXL_ASSERT(label->IsBound());
|
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VIXL_ASSERT((pc_ >= label->target()) && (pc_ < (buffer_ + buffer_size_)));
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return pc_ - label->target();
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VIXL_ASSERT(pc_offset >= static_cast<size_t>(label->location()));
|
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VIXL_ASSERT(pc_offset < buffer_size_);
|
||||
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return pc_offset - label->location();
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||||
}
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||||
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||||
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||||
@ -1693,6 +1950,15 @@ class Assembler {
|
||||
void EmitLiteralPool(LiteralPoolEmitOption option = NoJumpRequired);
|
||||
size_t LiteralPoolSize();
|
||||
|
||||
inline PositionIndependentCodeOption pic() {
|
||||
return pic_;
|
||||
}
|
||||
|
||||
inline bool AllowPageOffsetDependentCode() {
|
||||
return (pic() == PageOffsetDependentCode) ||
|
||||
(pic() == PositionDependentCode);
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||||
}
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||||
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protected:
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inline const Register& AppropriateZeroRegFor(const CPURegister& reg) const {
|
||||
return reg.Is64Bits() ? xzr : wzr;
|
||||
@ -1701,7 +1967,8 @@ class Assembler {
|
||||
|
||||
void LoadStore(const CPURegister& rt,
|
||||
const MemOperand& addr,
|
||||
LoadStoreOp op);
|
||||
LoadStoreOp op,
|
||||
LoadStoreScalingOption option = PreferScaledOffset);
|
||||
static bool IsImmLSUnscaled(ptrdiff_t offset);
|
||||
static bool IsImmLSScaled(ptrdiff_t offset, LSDataSize size);
|
||||
|
||||
@ -1717,9 +1984,9 @@ class Assembler {
|
||||
LogicalOp op);
|
||||
static bool IsImmLogical(uint64_t value,
|
||||
unsigned width,
|
||||
unsigned* n,
|
||||
unsigned* imm_s,
|
||||
unsigned* imm_r);
|
||||
unsigned* n = NULL,
|
||||
unsigned* imm_s = NULL,
|
||||
unsigned* imm_r = NULL);
|
||||
|
||||
void ConditionalCompare(const Register& rn,
|
||||
const Operand& operand,
|
||||
@ -1823,6 +2090,17 @@ class Assembler {
|
||||
|
||||
void RecordLiteral(int64_t imm, unsigned size);
|
||||
|
||||
// Link the current (not-yet-emitted) instruction to the specified label, then
|
||||
// return an offset to be encoded in the instruction. If the label is not yet
|
||||
// bound, an offset of 0 is returned.
|
||||
ptrdiff_t LinkAndGetByteOffsetTo(Label * label);
|
||||
ptrdiff_t LinkAndGetInstructionOffsetTo(Label * label);
|
||||
ptrdiff_t LinkAndGetPageOffsetTo(Label * label);
|
||||
|
||||
// A common implementation for the LinkAndGet<Type>OffsetTo helpers.
|
||||
template <int element_size>
|
||||
ptrdiff_t LinkAndGetOffsetTo(Label* label);
|
||||
|
||||
// Emit the instruction at pc_.
|
||||
void Emit(Instr instruction) {
|
||||
VIXL_STATIC_ASSERT(sizeof(*pc_) == 1);
|
||||
@ -1864,12 +2142,15 @@ class Assembler {
|
||||
// The buffer into which code and relocation info are generated.
|
||||
Instruction* buffer_;
|
||||
// Buffer size, in bytes.
|
||||
unsigned buffer_size_;
|
||||
size_t buffer_size_;
|
||||
Instruction* pc_;
|
||||
std::list<Literal*> literals_;
|
||||
Instruction* next_literal_pool_check_;
|
||||
unsigned literal_pool_monitor_;
|
||||
|
||||
PositionIndependentCodeOption pic_;
|
||||
|
||||
friend class Label;
|
||||
friend class BlockLiteralPoolScope;
|
||||
|
||||
#ifdef DEBUG
|
||||
|
||||
@ -50,9 +50,9 @@ V_(Rd, 4, 0, Bits) /* Destination register. */ \
|
||||
V_(Rn, 9, 5, Bits) /* First source register. */ \
|
||||
V_(Rm, 20, 16, Bits) /* Second source register. */ \
|
||||
V_(Ra, 14, 10, Bits) /* Third source register. */ \
|
||||
V_(Rt, 4, 0, Bits) /* Load dest / store source. */ \
|
||||
V_(Rt2, 14, 10, Bits) /* Load second dest / */ \
|
||||
/* store second source. */ \
|
||||
V_(Rt, 4, 0, Bits) /* Load/store register. */ \
|
||||
V_(Rt2, 14, 10, Bits) /* Load/store second register. */ \
|
||||
V_(Rs, 20, 16, Bits) /* Exclusive access status. */ \
|
||||
V_(PrefetchMode, 4, 0, Bits) \
|
||||
\
|
||||
/* Common bits */ \
|
||||
@ -126,6 +126,13 @@ V_(SysOp1, 18, 16, Bits) \
|
||||
V_(SysOp2, 7, 5, Bits) \
|
||||
V_(CRn, 15, 12, Bits) \
|
||||
V_(CRm, 11, 8, Bits) \
|
||||
\
|
||||
/* Load-/store-exclusive */ \
|
||||
V_(LdStXLoad, 22, 22, Bits) \
|
||||
V_(LdStXNotExclusive, 23, 23, Bits) \
|
||||
V_(LdStXAcquireRelease, 15, 15, Bits) \
|
||||
V_(LdStXSizeLog2, 31, 30, Bits) \
|
||||
V_(LdStXPair, 21, 21, Bits) \
|
||||
|
||||
|
||||
#define SYSTEM_REGISTER_FIELDS_LIST(V_, M_) \
|
||||
@ -585,6 +592,13 @@ enum MemBarrierOp {
|
||||
ISB = MemBarrierFixed | 0x00000040
|
||||
};
|
||||
|
||||
enum SystemExclusiveMonitorOp {
|
||||
SystemExclusiveMonitorFixed = 0xD503305F,
|
||||
SystemExclusiveMonitorFMask = 0xFFFFF0FF,
|
||||
SystemExclusiveMonitorMask = 0xFFFFF0FF,
|
||||
CLREX = SystemExclusiveMonitorFixed
|
||||
};
|
||||
|
||||
// Any load or store.
|
||||
enum LoadStoreAnyOp {
|
||||
LoadStoreAnyFMask = 0x0a000000,
|
||||
@ -756,6 +770,44 @@ enum LoadStoreRegisterOffset {
|
||||
#undef LOAD_STORE_REGISTER_OFFSET
|
||||
};
|
||||
|
||||
enum LoadStoreExclusive {
|
||||
LoadStoreExclusiveFixed = 0x08000000,
|
||||
LoadStoreExclusiveFMask = 0x3F000000,
|
||||
LoadStoreExclusiveMask = 0xFFE08000,
|
||||
STXRB_w = LoadStoreExclusiveFixed | 0x00000000,
|
||||
STXRH_w = LoadStoreExclusiveFixed | 0x40000000,
|
||||
STXR_w = LoadStoreExclusiveFixed | 0x80000000,
|
||||
STXR_x = LoadStoreExclusiveFixed | 0xC0000000,
|
||||
LDXRB_w = LoadStoreExclusiveFixed | 0x00400000,
|
||||
LDXRH_w = LoadStoreExclusiveFixed | 0x40400000,
|
||||
LDXR_w = LoadStoreExclusiveFixed | 0x80400000,
|
||||
LDXR_x = LoadStoreExclusiveFixed | 0xC0400000,
|
||||
STXP_w = LoadStoreExclusiveFixed | 0x80200000,
|
||||
STXP_x = LoadStoreExclusiveFixed | 0xC0200000,
|
||||
LDXP_w = LoadStoreExclusiveFixed | 0x80600000,
|
||||
LDXP_x = LoadStoreExclusiveFixed | 0xC0600000,
|
||||
STLXRB_w = LoadStoreExclusiveFixed | 0x00008000,
|
||||
STLXRH_w = LoadStoreExclusiveFixed | 0x40008000,
|
||||
STLXR_w = LoadStoreExclusiveFixed | 0x80008000,
|
||||
STLXR_x = LoadStoreExclusiveFixed | 0xC0008000,
|
||||
LDAXRB_w = LoadStoreExclusiveFixed | 0x00408000,
|
||||
LDAXRH_w = LoadStoreExclusiveFixed | 0x40408000,
|
||||
LDAXR_w = LoadStoreExclusiveFixed | 0x80408000,
|
||||
LDAXR_x = LoadStoreExclusiveFixed | 0xC0408000,
|
||||
STLXP_w = LoadStoreExclusiveFixed | 0x80208000,
|
||||
STLXP_x = LoadStoreExclusiveFixed | 0xC0208000,
|
||||
LDAXP_w = LoadStoreExclusiveFixed | 0x80608000,
|
||||
LDAXP_x = LoadStoreExclusiveFixed | 0xC0608000,
|
||||
STLRB_w = LoadStoreExclusiveFixed | 0x00808000,
|
||||
STLRH_w = LoadStoreExclusiveFixed | 0x40808000,
|
||||
STLR_w = LoadStoreExclusiveFixed | 0x80808000,
|
||||
STLR_x = LoadStoreExclusiveFixed | 0xC0808000,
|
||||
LDARB_w = LoadStoreExclusiveFixed | 0x00C08000,
|
||||
LDARH_w = LoadStoreExclusiveFixed | 0x40C08000,
|
||||
LDAR_w = LoadStoreExclusiveFixed | 0x80C08000,
|
||||
LDAR_x = LoadStoreExclusiveFixed | 0xC0C08000
|
||||
};
|
||||
|
||||
// Conditional compare.
|
||||
enum ConditionalCompareOp {
|
||||
ConditionalCompareMask = 0x60000000,
|
||||
|
||||
@ -28,6 +28,7 @@
|
||||
#define VIXL_CPU_A64_H
|
||||
|
||||
#include "globals.h"
|
||||
#include "instructions-a64.h"
|
||||
|
||||
namespace vixl {
|
||||
|
||||
@ -42,6 +43,32 @@ class CPU {
|
||||
// safely run.
|
||||
static void EnsureIAndDCacheCoherency(void *address, size_t length);
|
||||
|
||||
// Handle tagged pointers.
|
||||
template <typename T>
|
||||
static T SetPointerTag(T pointer, uint64_t tag) {
|
||||
VIXL_ASSERT(is_uintn(kAddressTagWidth, tag));
|
||||
|
||||
// Use C-style casts to get static_cast behaviour for integral types (T),
|
||||
// and reinterpret_cast behaviour for other types.
|
||||
|
||||
uint64_t raw = (uint64_t)pointer;
|
||||
VIXL_STATIC_ASSERT(sizeof(pointer) == sizeof(raw));
|
||||
|
||||
raw = (raw & ~kAddressTagMask) | (tag << kAddressTagOffset);
|
||||
return (T)raw;
|
||||
}
|
||||
|
||||
template <typename T>
|
||||
static uint64_t GetPointerTag(T pointer) {
|
||||
// Use C-style casts to get static_cast behaviour for integral types (T),
|
||||
// and reinterpret_cast behaviour for other types.
|
||||
|
||||
uint64_t raw = (uint64_t)pointer;
|
||||
VIXL_STATIC_ASSERT(sizeof(pointer) == sizeof(raw));
|
||||
|
||||
return (raw & kAddressTagMask) >> kAddressTagOffset;
|
||||
}
|
||||
|
||||
private:
|
||||
// Return the content of the cache type register.
|
||||
static uint32_t GetCacheType();
|
||||
|
||||
@ -280,8 +280,7 @@ void Decoder::DecodeLoadStore(Instruction* instr) {
|
||||
if (instr->Bit(28) == 0) {
|
||||
if (instr->Bit(29) == 0) {
|
||||
if (instr->Bit(26) == 0) {
|
||||
// TODO: VisitLoadStoreExclusive.
|
||||
VisitUnimplemented(instr);
|
||||
VisitLoadStoreExclusive(instr);
|
||||
} else {
|
||||
DecodeAdvSIMDLoadStore(instr);
|
||||
}
|
||||
|
||||
@ -59,6 +59,7 @@
|
||||
V(LoadStorePreIndex) \
|
||||
V(LoadStoreRegisterOffset) \
|
||||
V(LoadStoreUnsignedOffset) \
|
||||
V(LoadStoreExclusive) \
|
||||
V(LogicalShifted) \
|
||||
V(AddSubShifted) \
|
||||
V(AddSubExtended) \
|
||||
|
||||
@ -24,6 +24,7 @@
|
||||
// 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.
|
||||
|
||||
#include <cstdlib>
|
||||
#include "a64/disasm-a64.h"
|
||||
|
||||
namespace vixl {
|
||||
@ -529,7 +530,7 @@ void Disassembler::VisitExtract(Instruction* instr) {
|
||||
void Disassembler::VisitPCRelAddressing(Instruction* instr) {
|
||||
switch (instr->Mask(PCRelAddressingMask)) {
|
||||
case ADR: Format(instr, "adr", "'Xd, 'AddrPCRelByte"); break;
|
||||
// ADRP is not implemented.
|
||||
case ADRP: Format(instr, "adrp", "'Xd, 'AddrPCRelPage"); break;
|
||||
default: Format(instr, "unimplemented", "(PCRelAddressing)");
|
||||
}
|
||||
}
|
||||
@ -943,6 +944,49 @@ void Disassembler::VisitLoadStorePairNonTemporal(Instruction* instr) {
|
||||
}
|
||||
|
||||
|
||||
void Disassembler::VisitLoadStoreExclusive(Instruction* instr) {
|
||||
const char *mnemonic = "unimplemented";
|
||||
const char *form;
|
||||
|
||||
switch (instr->Mask(LoadStoreExclusiveMask)) {
|
||||
case STXRB_w: mnemonic = "stxrb"; form = "'Ws, 'Wt, ['Xns]"; break;
|
||||
case STXRH_w: mnemonic = "stxrh"; form = "'Ws, 'Wt, ['Xns]"; break;
|
||||
case STXR_w: mnemonic = "stxr"; form = "'Ws, 'Wt, ['Xns]"; break;
|
||||
case STXR_x: mnemonic = "stxr"; form = "'Ws, 'Xt, ['Xns]"; break;
|
||||
case LDXRB_w: mnemonic = "ldxrb"; form = "'Wt, ['Xns]"; break;
|
||||
case LDXRH_w: mnemonic = "ldxrh"; form = "'Wt, ['Xns]"; break;
|
||||
case LDXR_w: mnemonic = "ldxr"; form = "'Wt, ['Xns]"; break;
|
||||
case LDXR_x: mnemonic = "ldxr"; form = "'Xt, ['Xns]"; break;
|
||||
case STXP_w: mnemonic = "stxp"; form = "'Ws, 'Wt, 'Wt2, ['Xns]"; break;
|
||||
case STXP_x: mnemonic = "stxp"; form = "'Ws, 'Xt, 'Xt2, ['Xns]"; break;
|
||||
case LDXP_w: mnemonic = "ldxp"; form = "'Wt, 'Wt2, ['Xns]"; break;
|
||||
case LDXP_x: mnemonic = "ldxp"; form = "'Xt, 'Xt2, ['Xns]"; break;
|
||||
case STLXRB_w: mnemonic = "stlxrb"; form = "'Ws, 'Wt, ['Xns]"; break;
|
||||
case STLXRH_w: mnemonic = "stlxrh"; form = "'Ws, 'Wt, ['Xns]"; break;
|
||||
case STLXR_w: mnemonic = "stlxr"; form = "'Ws, 'Wt, ['Xns]"; break;
|
||||
case STLXR_x: mnemonic = "stlxr"; form = "'Ws, 'Xt, ['Xns]"; break;
|
||||
case LDAXRB_w: mnemonic = "ldaxrb"; form = "'Wt, ['Xns]"; break;
|
||||
case LDAXRH_w: mnemonic = "ldaxrh"; form = "'Wt, ['Xns]"; break;
|
||||
case LDAXR_w: mnemonic = "ldaxr"; form = "'Wt, ['Xns]"; break;
|
||||
case LDAXR_x: mnemonic = "ldaxr"; form = "'Xt, ['Xns]"; break;
|
||||
case STLXP_w: mnemonic = "stlxp"; form = "'Ws, 'Wt, 'Wt2, ['Xns]"; break;
|
||||
case STLXP_x: mnemonic = "stlxp"; form = "'Ws, 'Xt, 'Xt2, ['Xns]"; break;
|
||||
case LDAXP_w: mnemonic = "ldaxp"; form = "'Wt, 'Wt2, ['Xns]"; break;
|
||||
case LDAXP_x: mnemonic = "ldaxp"; form = "'Xt, 'Xt2, ['Xns]"; break;
|
||||
case STLRB_w: mnemonic = "stlrb"; form = "'Wt, ['Xns]"; break;
|
||||
case STLRH_w: mnemonic = "stlrh"; form = "'Wt, ['Xns]"; break;
|
||||
case STLR_w: mnemonic = "stlr"; form = "'Wt, ['Xns]"; break;
|
||||
case STLR_x: mnemonic = "stlr"; form = "'Xt, ['Xns]"; break;
|
||||
case LDARB_w: mnemonic = "ldarb"; form = "'Wt, ['Xns]"; break;
|
||||
case LDARH_w: mnemonic = "ldarh"; form = "'Wt, ['Xns]"; break;
|
||||
case LDAR_w: mnemonic = "ldar"; form = "'Wt, ['Xns]"; break;
|
||||
case LDAR_x: mnemonic = "ldar"; form = "'Xt, ['Xns]"; break;
|
||||
default: form = "(LoadStoreExclusive)";
|
||||
}
|
||||
Format(instr, mnemonic, form);
|
||||
}
|
||||
|
||||
|
||||
void Disassembler::VisitFPCompare(Instruction* instr) {
|
||||
const char *mnemonic = "unimplemented";
|
||||
const char *form = "'Fn, 'Fm";
|
||||
@ -1162,7 +1206,15 @@ void Disassembler::VisitSystem(Instruction* instr) {
|
||||
const char *mnemonic = "unimplemented";
|
||||
const char *form = "(System)";
|
||||
|
||||
if (instr->Mask(SystemSysRegFMask) == SystemSysRegFixed) {
|
||||
if (instr->Mask(SystemExclusiveMonitorFMask) == SystemExclusiveMonitorFixed) {
|
||||
switch (instr->Mask(SystemExclusiveMonitorMask)) {
|
||||
case CLREX: {
|
||||
mnemonic = "clrex";
|
||||
form = (instr->CRm() == 0xf) ? NULL : "'IX";
|
||||
break;
|
||||
}
|
||||
}
|
||||
} else if (instr->Mask(SystemSysRegFMask) == SystemSysRegFixed) {
|
||||
switch (instr->Mask(SystemSysRegMask)) {
|
||||
case MRS: {
|
||||
mnemonic = "mrs";
|
||||
@ -1184,7 +1236,6 @@ void Disassembler::VisitSystem(Instruction* instr) {
|
||||
}
|
||||
}
|
||||
} else if (instr->Mask(SystemHintFMask) == SystemHintFixed) {
|
||||
VIXL_ASSERT(instr->Mask(SystemHintMask) == HINT);
|
||||
switch (instr->ImmHint()) {
|
||||
case NOP: {
|
||||
mnemonic = "nop";
|
||||
@ -1312,6 +1363,7 @@ int Disassembler::SubstituteRegisterField(Instruction* instr,
|
||||
case 'n': reg_num = instr->Rn(); break;
|
||||
case 'm': reg_num = instr->Rm(); break;
|
||||
case 'a': reg_num = instr->Ra(); break;
|
||||
case 's': reg_num = instr->Rs(); break;
|
||||
case 't': {
|
||||
if (format[2] == '2') {
|
||||
reg_num = instr->Rt2();
|
||||
@ -1458,6 +1510,10 @@ int Disassembler::SubstituteImmediateField(Instruction* instr,
|
||||
AppendToOutput("#0x%" PRIx64, instr->ImmException());
|
||||
return 6;
|
||||
}
|
||||
case 'X': { // IX - CLREX instruction.
|
||||
AppendToOutput("#0x%" PRIx64, instr->CRm());
|
||||
return 2;
|
||||
}
|
||||
default: {
|
||||
VIXL_UNIMPLEMENTED();
|
||||
return 0;
|
||||
@ -1564,21 +1620,20 @@ int Disassembler::SubstituteConditionField(Instruction* instr,
|
||||
|
||||
int Disassembler::SubstitutePCRelAddressField(Instruction* instr,
|
||||
const char* format) {
|
||||
USE(format);
|
||||
VIXL_ASSERT(strncmp(format, "AddrPCRel", 9) == 0);
|
||||
VIXL_ASSERT((strcmp(format, "AddrPCRelByte") == 0) || // Used by `adr`.
|
||||
(strcmp(format, "AddrPCRelPage") == 0)); // Used by `adrp`.
|
||||
|
||||
int offset = instr->ImmPCRel();
|
||||
int64_t offset = instr->ImmPCRel();
|
||||
Instruction * base = instr;
|
||||
|
||||
// Only ADR (AddrPCRelByte) is supported.
|
||||
VIXL_ASSERT(strcmp(format, "AddrPCRelByte") == 0);
|
||||
|
||||
char sign = '+';
|
||||
if (offset < 0) {
|
||||
offset = -offset;
|
||||
sign = '-';
|
||||
if (format[9] == 'P') {
|
||||
offset *= kPageSize;
|
||||
base = AlignDown(base, kPageSize);
|
||||
}
|
||||
VIXL_STATIC_ASSERT(sizeof(*instr) == 1);
|
||||
AppendToOutput("#%c0x%x (addr %p)", sign, offset, instr + offset);
|
||||
|
||||
char sign = (offset < 0) ? '-' : '+';
|
||||
void * target = reinterpret_cast<void *>(base + offset);
|
||||
AppendToOutput("#%c0x%" PRIx64 " (addr %p)", sign, std::abs(offset), target);
|
||||
return 13;
|
||||
}
|
||||
|
||||
@ -1606,7 +1661,8 @@ int Disassembler::SubstituteBranchTargetField(Instruction* instr,
|
||||
sign = '-';
|
||||
}
|
||||
VIXL_STATIC_ASSERT(sizeof(*instr) == 1);
|
||||
AppendToOutput("#%c0x%" PRIx64 " (addr %p)", sign, offset, instr + offset);
|
||||
void * address = reinterpret_cast<void *>(instr + offset);
|
||||
AppendToOutput("#%c0x%" PRIx64 " (addr %p)", sign, offset, address);
|
||||
return 8;
|
||||
}
|
||||
|
||||
|
||||
@ -85,7 +85,7 @@ class Disassembler: public DecoderVisitor {
|
||||
bool IsMovzMovnImm(unsigned reg_size, uint64_t value);
|
||||
|
||||
void ResetOutput();
|
||||
void AppendToOutput(const char* string, ...);
|
||||
void AppendToOutput(const char* string, ...) PRINTF_CHECK(2, 3);
|
||||
|
||||
char* buffer_;
|
||||
uint32_t buffer_pos_;
|
||||
|
||||
@ -149,17 +149,24 @@ LSDataSize CalcLSPairDataSize(LoadStorePairOp op) {
|
||||
|
||||
|
||||
Instruction* Instruction::ImmPCOffsetTarget() {
|
||||
Instruction * base = this;
|
||||
ptrdiff_t offset;
|
||||
if (IsPCRelAddressing()) {
|
||||
// PC-relative addressing. Only ADR is supported.
|
||||
// ADR and ADRP.
|
||||
offset = ImmPCRel();
|
||||
if (Mask(PCRelAddressingMask) == ADRP) {
|
||||
base = AlignDown(base, kPageSize);
|
||||
offset *= kPageSize;
|
||||
} else {
|
||||
VIXL_ASSERT(Mask(PCRelAddressingMask) == ADR);
|
||||
}
|
||||
} else {
|
||||
// All PC-relative branches.
|
||||
VIXL_ASSERT(BranchType() != UnknownBranchType);
|
||||
// Relative branch offsets are instruction-size-aligned.
|
||||
offset = ImmBranch() << kInstructionSizeLog2;
|
||||
}
|
||||
return this + offset;
|
||||
return base + offset;
|
||||
}
|
||||
|
||||
|
||||
@ -185,10 +192,16 @@ void Instruction::SetImmPCOffsetTarget(Instruction* target) {
|
||||
|
||||
|
||||
void Instruction::SetPCRelImmTarget(Instruction* target) {
|
||||
// ADRP is not supported, so 'this' must point to an ADR instruction.
|
||||
VIXL_ASSERT(Mask(PCRelAddressingMask) == ADR);
|
||||
|
||||
Instr imm = Assembler::ImmPCRelAddress(target - this);
|
||||
int32_t imm21;
|
||||
if ((Mask(PCRelAddressingMask) == ADR)) {
|
||||
imm21 = target - this;
|
||||
} else {
|
||||
VIXL_ASSERT(Mask(PCRelAddressingMask) == ADRP);
|
||||
uintptr_t this_page = reinterpret_cast<uintptr_t>(this) / kPageSize;
|
||||
uintptr_t target_page = reinterpret_cast<uintptr_t>(target) / kPageSize;
|
||||
imm21 = target_page - this_page;
|
||||
}
|
||||
Instr imm = Assembler::ImmPCRelAddress(imm21);
|
||||
|
||||
SetInstructionBits(Mask(~ImmPCRel_mask) | imm);
|
||||
}
|
||||
|
||||
@ -41,6 +41,10 @@ const unsigned kLiteralEntrySize = 4;
|
||||
const unsigned kLiteralEntrySizeLog2 = 2;
|
||||
const unsigned kMaxLoadLiteralRange = 1 * MBytes;
|
||||
|
||||
// This is the nominal page size (as used by the adrp instruction); the actual
|
||||
// size of the memory pages allocated by the kernel is likely to differ.
|
||||
const unsigned kPageSize = 4 * KBytes;
|
||||
|
||||
const unsigned kWRegSize = 32;
|
||||
const unsigned kWRegSizeLog2 = 5;
|
||||
const unsigned kWRegSizeInBytes = kWRegSize / 8;
|
||||
@ -79,6 +83,12 @@ const unsigned kZeroRegCode = 31;
|
||||
const unsigned kSPRegInternalCode = 63;
|
||||
const unsigned kRegCodeMask = 0x1f;
|
||||
|
||||
const unsigned kAddressTagOffset = 56;
|
||||
const unsigned kAddressTagWidth = 8;
|
||||
const uint64_t kAddressTagMask =
|
||||
((UINT64_C(1) << kAddressTagWidth) - 1) << kAddressTagOffset;
|
||||
VIXL_STATIC_ASSERT(kAddressTagMask == UINT64_C(0xff00000000000000));
|
||||
|
||||
// AArch64 floating-point specifics. These match IEEE-754.
|
||||
const unsigned kDoubleMantissaBits = 52;
|
||||
const unsigned kDoubleExponentBits = 11;
|
||||
|
||||
@ -28,14 +28,10 @@
|
||||
#define PLATFORM_H
|
||||
|
||||
// Define platform specific functionalities.
|
||||
#include <signal.h>
|
||||
|
||||
namespace vixl {
|
||||
#ifdef USE_SIMULATOR
|
||||
// Currently we assume running the simulator implies running on x86 hardware.
|
||||
inline void HostBreakpoint() { asm("int3"); }
|
||||
#else
|
||||
inline void HostBreakpoint() { asm("brk"); }
|
||||
#endif
|
||||
inline void HostBreakpoint() { raise(SIGINT); }
|
||||
} // namespace vixl
|
||||
|
||||
#endif
|
||||
|
||||
@ -124,4 +124,14 @@ int CountSetBits(uint64_t value, int width) {
|
||||
|
||||
return value;
|
||||
}
|
||||
|
||||
|
||||
uint64_t LowestSetBit(uint64_t value) {
|
||||
return value & -value;
|
||||
}
|
||||
|
||||
|
||||
bool IsPowerOf2(int64_t value) {
|
||||
return (value != 0) && ((value & (value - 1)) == 0);
|
||||
}
|
||||
} // namespace vixl
|
||||
|
||||
@ -33,6 +33,14 @@
|
||||
|
||||
namespace vixl {
|
||||
|
||||
// Macros for compile-time format checking.
|
||||
#if defined(__GNUC__)
|
||||
#define PRINTF_CHECK(format_index, varargs_index) \
|
||||
__attribute__((format(printf, format_index, varargs_index)))
|
||||
#else
|
||||
#define PRINTF_CHECK(format_index, varargs_index)
|
||||
#endif
|
||||
|
||||
// Check number width.
|
||||
inline bool is_intn(unsigned n, int64_t x) {
|
||||
VIXL_ASSERT((0 < n) && (n < 64));
|
||||
@ -155,6 +163,8 @@ int CountLeadingZeros(uint64_t value, int width);
|
||||
int CountLeadingSignBits(int64_t value, int width);
|
||||
int CountTrailingZeros(uint64_t value, int width);
|
||||
int CountSetBits(uint64_t value, int width);
|
||||
uint64_t LowestSetBit(uint64_t value);
|
||||
bool IsPowerOf2(int64_t value);
|
||||
|
||||
// Pointer alignment
|
||||
// TODO: rename/refactor to make it specific to instructions.
|
||||
@ -167,21 +177,31 @@ bool IsWordAligned(T pointer) {
|
||||
// Increment a pointer until it has the specified alignment.
|
||||
template<class T>
|
||||
T AlignUp(T pointer, size_t alignment) {
|
||||
VIXL_STATIC_ASSERT(sizeof(pointer) == sizeof(uintptr_t));
|
||||
uintptr_t pointer_raw = reinterpret_cast<uintptr_t>(pointer);
|
||||
// Use C-style casts to get static_cast behaviour for integral types (T), and
|
||||
// reinterpret_cast behaviour for other types.
|
||||
|
||||
uintptr_t pointer_raw = (uintptr_t)pointer;
|
||||
VIXL_STATIC_ASSERT(sizeof(pointer) == sizeof(pointer_raw));
|
||||
|
||||
size_t align_step = (alignment - pointer_raw) % alignment;
|
||||
VIXL_ASSERT((pointer_raw + align_step) % alignment == 0);
|
||||
return reinterpret_cast<T>(pointer_raw + align_step);
|
||||
|
||||
return (T)(pointer_raw + align_step);
|
||||
}
|
||||
|
||||
// Decrement a pointer until it has the specified alignment.
|
||||
template<class T>
|
||||
T AlignDown(T pointer, size_t alignment) {
|
||||
VIXL_STATIC_ASSERT(sizeof(pointer) == sizeof(uintptr_t));
|
||||
uintptr_t pointer_raw = reinterpret_cast<uintptr_t>(pointer);
|
||||
// Use C-style casts to get static_cast behaviour for integral types (T), and
|
||||
// reinterpret_cast behaviour for other types.
|
||||
|
||||
uintptr_t pointer_raw = (uintptr_t)pointer;
|
||||
VIXL_STATIC_ASSERT(sizeof(pointer) == sizeof(pointer_raw));
|
||||
|
||||
size_t align_step = pointer_raw % alignment;
|
||||
VIXL_ASSERT((pointer_raw - align_step) % alignment == 0);
|
||||
return reinterpret_cast<T>(pointer_raw - align_step);
|
||||
|
||||
return (T)(pointer_raw - align_step);
|
||||
}
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user