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99 lines
3.4 KiB
C++
99 lines
3.4 KiB
C++
/* ###
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* IP: GHIDRA
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __PCODE_SNIPPET__
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#define __PCODE_SNIPPET__
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#include "pcodecompile.hh"
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#include "sleighbase.hh"
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// Classes for compiling a standalone snippet of pcode, given an existing sleigh language
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struct IdentRec {
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const char *nm;
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int4 id;
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};
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class PcodeLexer {
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public:
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enum { // Lexer states
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start,
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special2, // Middle of special 2 character operator
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special3, // First character of special 3 character operator
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special32, // Second character of special 3 character operator
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comment, // Middle of an endofline comment
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punctuation, // Punctuation character
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identifier, // Middle of an identifier
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hexstring, // Middle of a hexidecimal number
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decstring, // Middle of a decimal number
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endstream, // Reached end of stream
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illegal // Scanned an illegal character
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};
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private:
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static const IdentRec idents[];
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int4 curstate;
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char curchar,lookahead1,lookahead2;
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char curtoken[256];
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int4 tokpos;
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bool endofstream;
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bool endofstreamsent;
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istream *s;
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string curidentifier;
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uintb curnum;
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void starttoken(void) { curtoken[0] = curchar; tokpos = 1; }
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void advancetoken(void) { curtoken[tokpos++] = curchar; }
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bool isIdent(char c) const { return (isalnum(c)||(c=='_')||(c=='.')); }
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bool isHex(char c) const { return isxdigit(c); }
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bool isDec(char c) const { return isdigit(c); }
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int4 findIdentifier(const string &str) const;
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int4 moveState(void);
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public:
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PcodeLexer(void) { s = (istream *)0; }
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void initialize(istream *t);
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int4 getNextToken(void);
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const string &getIdentifier(void) const { return curidentifier; }
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uintb getNumber(void) const { return curnum; }
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};
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class PcodeSnippet : public PcodeCompile {
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PcodeLexer lexer;
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const SleighBase *sleigh; // Language from which we get symbols
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SymbolTree tree; // Symbols in the local scope of the snippet (temporaries)
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uintb tempbase;
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int4 errorcount;
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string firsterror;
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ConstructTpl *result;
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virtual uintb allocateTemp(void);
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virtual void addSymbol(SleighSymbol *sym);
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public:
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PcodeSnippet(const SleighBase *slgh);
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void setResult(ConstructTpl *res) { result = res; }
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ConstructTpl *releaseResult(void) { ConstructTpl *res = result; result = (ConstructTpl *)0; return res; }
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virtual ~PcodeSnippet(void);
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virtual const Location *getLocation(SleighSymbol *sym) const { return (const Location *)0; }
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virtual void reportError(const Location *loc, const string &msg);
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virtual void reportWarning(const Location *loc, const string &msg) {}
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bool hasErrors(void) const { return (errorcount != 0); }
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const string getErrorMessage(void) const { return firsterror; }
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void setUniqueBase(uintb val) { tempbase = val; }
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uintb getUniqueBase(void) const { return tempbase; }
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void clear(void);
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int lex(void);
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bool parseStream(istream& s);
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void addOperand(const string &name,int4 index);
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};
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#endif
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