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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is [Open Source Virtual Machine.].
*
* The Initial Developer of the Original Code is
* Adobe System Incorporated.
* Portions created by the Initial Developer are Copyright (C) 2004-2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Adobe AS3 Team
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef __avmplus_coff__
#define __avmplus_coff__
namespace avmplus
{
#if defined(DEBUGGER) && defined(AVMPLUS_IA32)
namespace compiler
{
/** The magic number in COFF files signifying an i386 object file */
const int I386MAGIC = 0x14c;
/**
* The header of a COFF file
* @see Coff
*/
typedef struct
{
unsigned short f_magic; /**< magic number */
unsigned short f_nscns; /**< number of sections */
unsigned long f_timdat; /**< time & date stamp */
unsigned long f_symptr; /**< file pointer to symtab */
unsigned long f_nsyms; /**< number of symtab entries */
unsigned short f_opthdr; /**< sizeof(optional hdr) */
unsigned short f_flags; /**< flags */
}
CoffHeader_t;
/**
* If set, there is no relocation information in this file.
* This is usually clear for objects and set for executables.
*/
const int F_RELFLG = 0x0001;
/**
* If set, all unresolved symbols have been resolved
* and the file may be considered executable.
*/
const int F_EXEC = 0x0002;
/**
* If set, all line number information has been removed
* from the file (or was never added in the first place).
*/
const int F_LNNO = 0x0004;
/**
* If set, all the local symbols have been removed
* from the file (or were never added in the first place).
*/
const int F_LSYMS = 0x0008;
/**
* Indicates that the file is 32-bit little endian
*/
const int F_AR32WR = 0x0100;
/**
* A section header in the COFF file format
* @see Coff
*/
typedef struct
{
/** section name */
char s_name[8];
/** physical address, aliased s_nlib */
unsigned long s_paddr;
/** virtual address */
unsigned long s_vaddr;
/** section size */
unsigned long s_size;
/** file ptr to raw data for section */
unsigned long s_scnptr;
/** file ptr to relocation */
unsigned long s_relptr;
/** file ptr to line numbers */
unsigned long s_lnnoptr;
/** number of relocation entries */
unsigned short s_nreloc;
/** number of line number entries */
unsigned short s_nlnno;
/** flags */
unsigned long s_flags;
}
SectionHeader_t;
/**
* If set, indicates that this section contains only executable code.
*/
const int STYP_TEXT = 0x0020;
/**
* If set, indicates that this section contains only initialized data.
*/
const int STYP_DATA = 0x0040;
/**
* If set, indicates that this section defines uninitialized data,
* and has no data stored in the coff file for it.
*/
const int STYP_BSS = 0x0080;
#pragma pack(2) // don't add trailing bytes
/**
* A symbol entry in the COFF file format
* @see Coff
*/
typedef struct
{
union
{
/** inline name */
char str[8];
struct
{
unsigned long zero;
unsigned long offset;
} table;
} name;
unsigned long value;
short scnum;
unsigned short type;
unsigned char sclass;
unsigned char numaux;
}
SymbolEntry_t;
#pragma pack() // return to default
/**
* The Coff class writes out object files in the COFF format
* (Common Object File Format)
*
* This is a useful tool for debugging the Compiler code generator
* that translates AVM+ bytecode to native machine code.
*/
class Coff
{
public:
enum { NUM_SECTIONS = 64 };
enum { NUM_SYMBOLS = 128 };
Coff();
void addSection(const char* ar, int numBytes, int startAddr, int endAddr);
void addSymbol(const char* name, int value);
void done();
private:
virtual ~Coff();
void initHeader();
char* write(char* dst, const char* src, int count);
CoffHeader_t header;
SectionHeader_t* sections[NUM_SECTIONS];
SymbolEntry_t* symbols[NUM_SYMBOLS];
};
}
#endif // DEBUGGER
}
#endif /* __avmplus_coff__ */