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New loader structure. Expand Nate's ObjectFile to automatically detect file formats

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and generate an appropriate child object, which knows how to load its text & data into memory
(and symbols, for ecoff only at this point).  Ecoff format supports Tru64 binaries, kernel, and
console.  A.out format is used by PAL code.  Elf support is there and appears to work for
Alpha/Linux binaries, but awaits a Linux syscall emulation layer before further testing.

arch/alpha/ecoff_machdep.h:
base/coff_sym.h:
base/coff_symconst.h:
base/exec_ecoff.h:
    Add Id string & provenance comment, clean up types
base/object_file.cc:
base/object_file.hh:
    Add auto format detection and text/data loading.
sim/prog.cc:
    Moved binary loading & stack setup here (was in arch/alpha/loader.cc).  Some of this is
    platform-dependent, but I think most of it is not.  We'll factor out the platform-dependent
    parts when the need arises.
sim/prog.hh:
    Get rid of unused environ_base field.
sim/system.cc:
    Use new ObjectFile loader structure for console, kernel, & palcode.

--HG--
extra : convert_revision : 8eae509bf71cf204bc3ec78c68699cfd01baed97
This commit is contained in:
Steve Reinhardt 2003-10-07 23:13:01 -07:00
parent 998d2914db
commit e475dba424
17 changed files with 1747 additions and 159 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

41
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/* $Id$ */
#ifndef __AOUT_MACHDEP_H__
#define __AOUT_MACHDEP_H__
///
/// Funky Alpha 64-bit a.out header used for PAL code.
///
struct aout_exechdr {
uint16_t magic;
uint16_t vstamp;
uint16_t bldrev;
uint16_t padcell;
uint64_t tsize; // text segment size
uint64_t dsize; // data segment size
uint64_t bsize; // bss segment size
uint64_t entry; // entry point
uint64_t text_start; // text base address
uint64_t data_start; // data base address
uint64_t bss_start; // bss base address
uint32_t gprmask;
uint32_t fprmask;
uint64_t gp_value;
};
#define AOUT_LDPGSZ 8192
#define N_GETMAGIC(ex) ((ex).magic)
#define N_BADMAX
#define N_TXTADDR(ex) ((ex).text_start)
#define N_DATADDR(ex) ((ex).data_start)
#define N_BSSADDR(ex) ((ex).bss_start)
#define N_TXTOFF(ex) \
(N_GETMAGIC(ex) == ZMAGIC ? 0 : sizeof(struct aout_exechdr))
#define N_DATOFF(ex) N_ALIGN(ex, N_TXTOFF(ex) + (ex).tsize)
#endif /* !__AOUT_MACHDEP_H__*/

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/* $Id$ */
/*
* Taken from NetBSD arch/alpha/ecoff_machdep.h
*/
/* $NetBSD: ecoff_machdep.h,v 1.5 1999/04/27 02:32:33 cgd Exp $ */
/*
* Copyright (c) 1994 Adam Glass
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Adam Glass.
* 4. The name of the Author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Adam Glass ``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 Adam Glass 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.
*/
//
// Define COFF/ECOFF integer type sizes
//
typedef int16_t coff_short;
typedef uint16_t coff_ushort;
typedef int32_t coff_int;
typedef uint32_t coff_uint;
typedef int64_t coff_long;
typedef uint64_t coff_ulong;
typedef uint64_t coff_addr;
#define ECOFF_LDPGSZ 4096
#define ECOFF_PAD \
coff_ushort bldrev; /* XXX */
#define ECOFF_MACHDEP \
coff_uint gprmask; \
coff_uint fprmask; \
coff_ulong gp_value
#define ECOFF_MAGIC_ALPHA 0603
#define ECOFF_MAGIC_NETBSD_ALPHA 0605
#define ECOFF_BADMAG(ep) \
((ep)->f.f_magic != ECOFF_MAGIC_ALPHA && \
(ep)->f.f_magic != ECOFF_MAGIC_NETBSD_ALPHA)
#define ECOFF_FLAG_EXEC 0002
#define ECOFF_SEGMENT_ALIGNMENT(ep) \
(((ep)->f.f_flags & ECOFF_FLAG_EXEC) == 0 ? 8 : 16)
#define ECOFF_FLAG_OBJECT_TYPE_MASK 0x3000
#define ECOFF_OBJECT_TYPE_NO_SHARED 0x1000
#define ECOFF_OBJECT_TYPE_SHARABLE 0x2000
#define ECOFF_OBJECT_TYPE_CALL_SHARED 0x3000

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/*
* Copyright (c) 2003 The Regents of The University of Michigan
* 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 the copyright holders 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 AND 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.
*/
#include <string>
#include "aout_object.hh"
#include "functional_memory.hh"
#include "symtab.hh"
#include "trace.hh" // for DPRINTF
#include "exec_aout.h"
using namespace std;
ObjectFile *
AoutObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
{
if (!N_BADMAG(*(aout_exechdr *)data)) {
return new AoutObject(fname, fd, len, data);
}
else {
return NULL;
}
}
AoutObject::AoutObject(const string &_filename, int _fd,
size_t _len, uint8_t *_data)
: ObjectFile(_filename, _fd, _len, _data)
{
execHdr = (aout_exechdr *)fileData;
entry = execHdr->entry;
text.baseAddr = N_TXTADDR(*execHdr);
text.size = execHdr->tsize;
data.baseAddr = N_DATADDR(*execHdr);
data.size = execHdr->dsize;
bss.baseAddr = N_BSSADDR(*execHdr);
bss.size = execHdr->bsize;
DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n",
text.baseAddr, text.size, data.baseAddr, data.size,
bss.baseAddr, bss.size);
}
bool
AoutObject::loadSections(FunctionalMemory *mem, bool loadPhys)
{
Addr textAddr = text.baseAddr;
Addr dataAddr = data.baseAddr;
if (loadPhys) {
textAddr &= (ULL(1) << 40) - 1;
dataAddr &= (ULL(1) << 40) - 1;
}
// Since we don't really have an MMU and all memory is
// zero-filled, there's no need to set up the BSS segment.
if (text.size != 0)
mem->prot_write(textAddr, fileData + N_TXTOFF(*execHdr), text.size);
if (data.size != 0)
mem->prot_write(dataAddr, fileData + N_DATOFF(*execHdr), data.size);
return true;
}
bool
AoutObject::loadGlobalSymbols(SymbolTable *symtab)
{
// a.out symbols not supported yet
return false;
}
bool
AoutObject::loadLocalSymbols(SymbolTable *symtab)
{
// a.out symbols not supported yet
return false;
}

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/*
* Copyright (c) 2003 The Regents of The University of Michigan
* 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 the copyright holders 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 AND 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 __AOUT_OBJECT_HH__
#define __AOUT_OBJECT_HH__
#include "object_file.hh"
// forward decls: avoid including exec_aout.h here
struct aout_exechdr;
class AoutObject : public ObjectFile
{
protected:
aout_exechdr *execHdr;
AoutObject(const std::string &_filename, int _fd,
size_t _len, uint8_t *_data);
public:
virtual ~AoutObject() {}
virtual bool loadSections(FunctionalMemory *mem,
bool loadPhys = false);
virtual bool loadGlobalSymbols(SymbolTable *symtab);
virtual bool loadLocalSymbols(SymbolTable *symtab);
static ObjectFile *tryFile(const std::string &fname, int fd,
size_t len, uint8_t *data);
};
#endif // __AOUT_OBJECT_HH__

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/* $Id$ */
/*
* Taken from binutils-2.14.90.0.5 include/coff/sym.h
*/
/* Declarations of internal format of MIPS ECOFF symbols.
Originally contributed by MIPS Computer Systems and Third Eye Software.
Changes contributed by Cygnus Support are in the public domain.
This file is just aggregated with the files that make up the GNU
release; it is not considered part of GAS, GDB, or other GNU
programs. */
/*
* |-----------------------------------------------------------|
* | Copyright (c) 1992, 1991, 1990 MIPS Computer Systems, Inc.|
* | MIPS Computer Systems, Inc. grants reproduction and use |
* | rights to all parties, PROVIDED that this comment is |
* | maintained in the copy. |
* |-----------------------------------------------------------|
*/
#ifndef _SYM_H
#define _SYM_H
/* (C) Copyright 1984 by Third Eye Software, Inc.
*
* Third Eye Software, Inc. grants reproduction and use rights to
* all parties, PROVIDED that this comment is maintained in the copy.
*
* Third Eye makes no claims about the applicability of this
* symbol table to a particular use.
*/
/*
* This file contains the definition of the Third Eye Symbol Table.
*
* Symbols are assumed to be in 'encounter order' - i.e. the order that
* the things they represent were encountered by the compiler/assembler/loader.
* EXCEPT for globals! These are assumed to be bunched together,
* probably right after the last 'normal' symbol. Globals ARE sorted
* in ascending order.
*
* -----------------------------------------------------------------------
* A brief word about Third Eye naming/use conventions:
*
* All arrays and index's are 0 based.
* All "ifooMax" values are the highest legal value PLUS ONE. This makes
* them good for allocating arrays, etc. All checks are "ifoo < ifooMax".
*
* "isym" Index into the SYMbol table.
* "ipd" Index into the Procedure Descriptor array.
* "ifd" Index into the File Descriptor array.
* "iss" Index into String Space.
* "cb" Count of Bytes.
* "rgPd" array whose domain is "0..ipdMax-1" and RanGe is PDR.
* "rgFd" array whose domain is "0..ifdMax-1" and RanGe is FDR.
*/
/*
* Symbolic Header (HDR) structure.
* As long as all the pointers are set correctly,
* we don't care WHAT order the various sections come out in!
*
* A file produced solely for the use of CDB will probably NOT have
* any instructions or data areas in it, as these are available
* in the original.
*/
typedef struct ecoff_symhdr {
coff_short magic; /* to verify validity of the table */
coff_short vstamp; /* version stamp */
coff_int ilineMax; /* number of line number entries */
coff_int idnMax; /* max index into dense number table */
coff_int ipdMax; /* number of procedures */
coff_int isymMax; /* number of local symbols */
coff_int ioptMax; /* max index into optimization symbol entries */
coff_int iauxMax; /* number of auxillary symbol entries */
coff_int issMax; /* max index into local strings */
coff_int issExtMax; /* max index into external strings */
coff_int ifdMax; /* number of file descriptor entries */
coff_int crfd; /* number of relative file descriptor entries */
coff_int iextMax; /* max index into external symbols */
coff_addr cbLine; /* number of bytes for line number entries */
coff_addr cbLineOffset; /* offset to start of line number entries*/
coff_addr cbDnOffset; /* offset to start dense number table */
coff_addr cbPdOffset; /* offset to procedure descriptor table */
coff_addr cbSymOffset; /* offset to start of local symbols*/
coff_addr cbOptOffset; /* offset to optimization symbol entries */
coff_addr cbAuxOffset; /* offset to start of auxillary symbol entries*/
coff_addr cbSsOffset; /* offset to start of local strings */
coff_addr cbSsExtOffset; /* offset to start of external strings */
coff_addr cbFdOffset; /* offset to file descriptor table */
coff_addr cbRfdOffset; /* offset to relative file descriptor table */
coff_addr cbExtOffset; /* offset to start of external symbol entries*/
/* If you add machine dependent fields, add them here */
} HDRR, *pHDRR;
#define cbHDRR sizeof(HDRR)
#define hdrNil ((pHDRR)0)
/*
* The FDR and PDR structures speed mapping of address <-> name.
* They are sorted in ascending memory order and are kept in
* memory by CDB at runtime.
*/
/*
* File Descriptor
*
* There is one of these for EVERY FILE, whether compiled with
* full debugging symbols or not. The name of a file should be
* the path name given to the compiler. This allows the user
* to simply specify the names of the directories where the COMPILES
* were done, and we will be able to find their files.
* A field whose comment starts with "R - " indicates that it will be
* setup at runtime.
*/
typedef struct ecoff_fdr {
coff_addr adr; /* memory address of beginning of file */
coff_addr cbLineOffset; /* byte offset from header for this file ln's */
coff_addr cbLine; /* size of lines for this file */
coff_addr cbSs; /* number of bytes in the ss */
coff_int rss; /* file name (of source, if known) */
coff_int issBase; /* file's string space */
coff_int isymBase; /* beginning of symbols */
coff_int csym; /* count file's of symbols */
coff_int ilineBase; /* file's line symbols */
coff_int cline; /* count of file's line symbols */
coff_int ioptBase; /* file's optimization entries */
coff_int copt; /* count of file's optimization entries */
coff_int ipdFirst; /* start of procedures for this file */
coff_int cpd; /* count of procedures for this file */
coff_int iauxBase; /* file's auxiliary entries */
coff_int caux; /* count of file's auxiliary entries */
coff_int rfdBase; /* index into the file indirect table */
coff_int crfd; /* count file indirect entries */
unsigned lang: 5; /* language for this file */
unsigned fMerge : 1; /* whether this file can be merged */
unsigned fReadin : 1; /* true if it was read in (not just created) */
unsigned fBigendian : 1;/* if set, was compiled on big endian machine */
/* aux's will be in compile host's sex */
unsigned glevel : 2; /* level this file was compiled with */
unsigned reserved : 22; /* reserved for future use */
coff_uint reserved2;
} FDR, *pFDR;
#define cbFDR sizeof(FDR)
#define fdNil ((pFDR)0)
#define ifdNil -1
#define ifdTemp 0
#define ilnNil -1
/*
* Procedure Descriptor
*
* There is one of these for EVERY TEXT LABEL.
* If a procedure is in a file with full symbols, then isym
* will point to the PROC symbols, else it will point to the
* global symbol for the label.
*/
typedef struct pdr {
coff_addr adr; /* memory address of start of procedure */
coff_addr cbLineOffset; /* byte offset for this procedure from the fd base */
coff_int isym; /* start of local symbol entries */
coff_int iline; /* start of line number entries*/
coff_uint regmask; /* save register mask */
coff_int regoffset; /* save register offset */
coff_int iopt; /* start of optimization symbol entries*/
coff_uint fregmask; /* save floating point register mask */
coff_int fregoffset; /* save floating point register offset */
coff_int frameoffset; /* frame size */
coff_int lnLow; /* lowest line in the procedure */
coff_int lnHigh; /* highest line in the procedure */
/* These fields are new for 64 bit ECOFF. */
unsigned gp_prologue : 8; /* byte size of GP prologue */
unsigned gp_used : 1; /* true if the procedure uses GP */
unsigned reg_frame : 1; /* true if register frame procedure */
unsigned prof : 1; /* true if compiled with -pg */
unsigned reserved : 13; /* reserved: must be zero */
unsigned localoff : 8; /* offset of local variables from vfp */
coff_short framereg; /* frame pointer register */
coff_short pcreg; /* offset or reg of return pc */
} PDR, *pPDR;
#define cbPDR sizeof(PDR)
#define pdNil ((pPDR) 0)
#define ipdNil -1
/*
* The structure of the runtime procedure descriptor created by the loader
* for use by the static exception system.
*/
/*
* If 0'd out because exception_info chokes Visual C++ and because there
* don't seem to be any references to this structure elsewhere in gdb.
*/
#if 0
typedef struct runtime_pdr {
coff_addr adr; /* memory address of start of procedure */
coff_uint regmask; /* save register mask */
coff_int regoffset; /* save register offset */
coff_uint fregmask; /* save floating point register mask */
coff_int fregoffset; /* save floating point register offset */
coff_int frameoffset; /* frame size */
coff_ushort framereg; /* frame pointer register */
coff_ushort pcreg; /* offset or reg of return pc */
coff_int irpss; /* index into the runtime string table */
coff_uint reserved;
struct exception_info *exception_info;/* pointer to exception array */
} RPDR, *pRPDR;
#define cbRPDR sizeof(RPDR)
#define rpdNil ((pRPDR) 0)
#endif
/*
* Line Numbers
*
* Line Numbers are segregated from the normal symbols because they
* are [1] smaller , [2] are of no interest to your
* average loader, and [3] are never needed in the middle of normal
* scanning and therefore slow things down.
*
* By definition, the first LINER for any given procedure will have
* the first line of a procedure and represent the first address.
*/
typedef coff_int LINER, *pLINER;
#define lineNil ((pLINER)0)
#define cbLINER sizeof(LINER)
#define ilineNil -1
/*
* The Symbol Structure (GFW, to those who Know!)
*/
typedef struct ecoff_sym {
coff_long value; /* value of symbol */
coff_int iss; /* index into String Space of name */
unsigned st : 6; /* symbol type */
unsigned sc : 5; /* storage class - text, data, etc */
unsigned reserved : 1; /* reserved */
unsigned index : 20; /* index into sym/aux table */
} SYMR, *pSYMR;
#define symNil ((pSYMR)0)
#define cbSYMR sizeof(SYMR)
#define isymNil -1
#define indexNil 0xfffff
#define issNil -1
#define issNull 0
/* The following converts a memory resident string to an iss.
* This hack is recognized in SbFIss, in sym.c of the debugger.
*/
#define IssFSb(sb) (0x80000000 | ((coff_ulong)(sb)))
/* E X T E R N A L S Y M B O L R E C O R D
*
* Same as the SYMR except it contains file context to determine where
* the index is.
*/
typedef struct ecoff_extsym {
SYMR asym; /* symbol for the external */
unsigned jmptbl:1; /* symbol is a jump table entry for shlibs */
unsigned cobol_main:1; /* symbol is a cobol main procedure */
unsigned weakext:1; /* symbol is weak external */
unsigned reserved:29; /* reserved for future use */
coff_int ifd; /* where the iss and index fields point into */
} EXTR, *pEXTR;
#define extNil ((pEXTR)0)
#define cbEXTR sizeof(EXTR)
/* A U X I L L A R Y T Y P E I N F O R M A T I O N */
/*
* Type Information Record
*/
typedef struct {
unsigned fBitfield : 1; /* set if bit width is specified */
unsigned continued : 1; /* indicates additional TQ info in next AUX */
unsigned bt : 6; /* basic type */
unsigned tq4 : 4;
unsigned tq5 : 4;
/* ---- 16 bit boundary ---- */
unsigned tq0 : 4;
unsigned tq1 : 4; /* 6 type qualifiers - tqPtr, etc. */
unsigned tq2 : 4;
unsigned tq3 : 4;
} TIR, *pTIR;
#define cbTIR sizeof(TIR)
#define tiNil ((pTIR)0)
#define itqMax 6
/*
* Relative symbol record
*
* If the rfd field is 4095, the index field indexes into the global symbol
* table.
*/
typedef struct {
unsigned rfd : 12; /* index into the file indirect table */
unsigned index : 20; /* index int sym/aux/iss tables */
} RNDXR, *pRNDXR;
#define cbRNDXR sizeof(RNDXR)
#define rndxNil ((pRNDXR)0)
/* dense numbers or sometimes called block numbers are stored in this type,
* a rfd of 0xffffffff is an index into the global table.
*/
typedef struct {
coff_uint rfd; /* index into the file table */
coff_uint index; /* index int sym/aux/iss tables */
} DNR, *pDNR;
#define cbDNR sizeof(DNR)
#define dnNil ((pDNR)0)
/*
* Auxillary information occurs only if needed.
* It ALWAYS occurs in this order when present.
isymMac used by stProc only
TIR type info
TIR additional TQ info (if first TIR was not enough)
rndx if (bt == btStruct,btUnion,btEnum,btSet,btRange,
btTypedef):
rsym.index == iaux for btSet or btRange
else rsym.index == isym
dimLow btRange, btSet
dimMac btRange, btSet
rndx0 As many as there are tq arrays
dimLow0
dimHigh0
...
rndxMax-1
dimLowMax-1
dimHighMax-1
width in bits if (bit field), width in bits.
*/
#define cAuxMax (6 + (idimMax*3))
/* a union of all possible info in the AUX universe */
typedef union {
TIR ti; /* type information record */
RNDXR rndx; /* relative index into symbol table */
coff_int dnLow; /* low dimension */
coff_int dnHigh; /* high dimension */
coff_int isym; /* symbol table index (end of proc) */
coff_int iss; /* index into string space (not used) */
coff_int width; /* width for non-default sized struc fields */
coff_int count; /* count of ranges for variant arm */
} AUXU, *pAUXU;
#define cbAUXU sizeof(AUXU)
#define auxNil ((pAUXU)0)
#define iauxNil -1
/*
* Optimization symbols
*
* Optimization symbols contain some overlap information with the normal
* symbol table. In particular, the proc information
* is somewhat redundant but necessary to easily find the other information
* present.
*
* All of the offsets are relative to the beginning of the last otProc
*/
typedef struct {
unsigned ot: 8; /* optimization type */
unsigned value: 24; /* address where we are moving it to */
RNDXR rndx; /* points to a symbol or opt entry */
coff_ulong offset; /* relative offset this occured */
} OPTR, *pOPTR;
#define optNil ((pOPTR) 0)
#define cbOPTR sizeof(OPTR)
#define ioptNil -1
/*
* File Indirect
*
* When a symbol is referenced across files the following procedure is used:
* 1) use the file index to get the File indirect entry.
* 2) use the file indirect entry to get the File descriptor.
* 3) add the sym index to the base of that file's sym table
*
*/
typedef coff_long RFDT, *pRFDT;
#define cbRFDT sizeof(RFDT)
#define rfdNil -1
/*
* The file indirect table in the mips loader is known as an array of FITs.
* This is done to keep the code in the loader readable in the area where
* these tables are merged. Note this is only a name change.
*/
typedef coff_int FIT, *pFIT;
#define cbFIT sizeof(FIT)
#define ifiNil -1
#define fiNil ((pFIT) 0)
#ifdef _LANGUAGE_PASCAL
#define ifdNil -1
#define ilnNil -1
#define ipdNil -1
#define ilineNil -1
#define isymNil -1
#define indexNil 16#fffff
#define issNil -1
#define issNull 0
#define itqMax 6
#define iauxNil -1
#define ioptNil -1
#define rfdNil -1
#define ifiNil -1
#endif /* _LANGUAGE_PASCAL */
/* Dense numbers
*
* Rather than use file index, symbol index pairs to represent symbols
* and globals, we use dense number so that they can be easily embeded
* in intermediate code and the programs that process them can
* use direct access tabls instead of hash table (which would be
* necesary otherwise because of the sparse name space caused by
* file index, symbol index pairs. Dense number are represented
* by RNDXRs.
*/
/*
* The following table defines the meaning of each SYM field as
* a function of the "st". (scD/B == scData OR scBss)
*
* Note: the value "isymMac" is used by symbols that have the concept
* of enclosing a block of related information. This value is the
* isym of the first symbol AFTER the end associated with the primary
* symbol. For example if a procedure was at isym==90 and had an
* isymMac==155, the associated end would be at isym==154, and the
* symbol at 155 would probably (although not necessarily) be the
* symbol for the next procedure. This allows rapid skipping over
* internal information of various sorts. "stEnd"s ALWAYS have the
* isym of the primary symbol that started the block.
*
ST SC VALUE INDEX
-------- ------ -------- ------
stFile scText address isymMac
stLabel scText address ---
stGlobal scD/B address iaux
stStatic scD/B address iaux
stParam scAbs offset iaux
stLocal scAbs offset iaux
stProc scText address iaux (isymMac is first AUX)
stStaticProc scText address iaux (isymMac is first AUX)
stMember scNil ordinal --- (if member of enum)
(mipsread thinks the case below has a bit, not byte, offset.)
stMember scNil byte offset iaux (if member of struct/union)
stMember scBits bit offset iaux (bit field spec)
stBlock scText address isymMac (text block)
(the code seems to think that rather than scNil, we see scInfo for
the two cases below.)
stBlock scNil cb isymMac (struct/union member define)
stBlock scNil cMembers isymMac (enum member define)
(New types added by SGI to simplify things:)
stStruct scInfo cb isymMac (struct type define)
stUnion scInfo cb isymMac (union type define)
stEnum scInfo cMembers isymMac (enum type define)
stEnd scText address isymStart
stEnd scNil ------- isymStart (struct/union/enum)
stTypedef scNil ------- iaux
stRegReloc sc??? value old register number
stForward sc??? new address isym to original symbol
stConstant scInfo value --- (scalar)
stConstant scInfo iss --- (complex, e.g. string)
*
*/
#endif

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/* $Id$ */
/*
* Taken from binutils-2.14.90.0.5 include/coff/symconst.h
*/
/* Declarations of constants for internal format of MIPS ECOFF symbols.
Originally contributed by MIPS Computer Systems and Third Eye Software.
Changes contributed by Cygnus Support are in the public domain.
This file is just aggregated with the files that make up the GNU
release; it is not considered part of GAS, GDB, or other GNU
programs. */
/*
* |-----------------------------------------------------------|
* | Copyright (c) 1992, 1991, 1990 MIPS Computer Systems, Inc.|
* | MIPS Computer Systems, Inc. grants reproduction and use |
* | rights to all parties, PROVIDED that this comment is |
* | maintained in the copy. |
* |-----------------------------------------------------------|
*/
/* (C) Copyright 1984 by Third Eye Software, Inc.
*
* Third Eye Software, Inc. grants reproduction and use rights to
* all parties, PROVIDED that this comment is maintained in the copy.
*
* Third Eye makes no claims about the applicability of this
* symbol table to a particular use.
*/
/* glevels for field in FDR */
#define GLEVEL_0 2
#define GLEVEL_1 1
#define GLEVEL_2 0 /* for upward compat reasons. */
#define GLEVEL_3 3
/* magic number fo symheader */
#define magicSym 0x7009
/* The Alpha uses this value instead, for some reason. */
#define magicSym2 0x1992
/* Language codes */
#define langC 0
#define langPascal 1
#define langFortran 2
#define langAssembler 3 /* one Assembley inst might map to many mach */
#define langMachine 4
#define langNil 5
#define langAda 6
#define langPl1 7
#define langCobol 8
#define langStdc 9 /* FIXME: Collides with SGI langCplusplus */
#define langCplusplus 9 /* FIXME: Collides with langStdc */
#define langCplusplusV2 10 /* SGI addition */
#define langMax 11 /* maximun allowed 32 -- 5 bits */
/* The following are value definitions for the fields in the SYMR */
/*
* Storage Classes
*/
#define scNil 0
#define scText 1 /* text symbol */
#define scData 2 /* initialized data symbol */
#define scBss 3 /* un-initialized data symbol */
#define scRegister 4 /* value of symbol is register number */
#define scAbs 5 /* value of symbol is absolute */
#define scUndefined 6 /* who knows? */
#define scCdbLocal 7 /* variable's value is IN se->va.?? */
#define scBits 8 /* this is a bit field */
#define scCdbSystem 9 /* variable's value is IN CDB's address space */
#define scDbx 9 /* overlap dbx internal use */
#define scRegImage 10 /* register value saved on stack */
#define scInfo 11 /* symbol contains debugger information */
#define scUserStruct 12 /* address in struct user for current process */
#define scSData 13 /* load time only small data */
#define scSBss 14 /* load time only small common */
#define scRData 15 /* load time only read only data */
#define scVar 16 /* Var parameter (fortran,pascal) */
#define scCommon 17 /* common variable */
#define scSCommon 18 /* small common */
#define scVarRegister 19 /* Var parameter in a register */
#define scVariant 20 /* Variant record */
#define scSUndefined 21 /* small undefined(external) data */
#define scInit 22 /* .init section symbol */
#define scBasedVar 23 /* Fortran or PL/1 ptr based var */
#define scXData 24 /* exception handling data */
#define scPData 25 /* Procedure section */
#define scFini 26 /* .fini section */
#define scRConst 27 /* .rconst section */
#define scMax 32
/*
* Symbol Types
*/
#define stNil 0 /* Nuthin' special */
#define stGlobal 1 /* external symbol */
#define stStatic 2 /* static */
#define stParam 3 /* procedure argument */
#define stLocal 4 /* local variable */
#define stLabel 5 /* label */
#define stProc 6 /* " " Procedure */
#define stBlock 7 /* beginnning of block */
#define stEnd 8 /* end (of anything) */
#define stMember 9 /* member (of anything - struct/union/enum */
#define stTypedef 10 /* type definition */
#define stFile 11 /* file name */
#define stRegReloc 12 /* register relocation */
#define stForward 13 /* forwarding address */
#define stStaticProc 14 /* load time only static procs */
#define stConstant 15 /* const */
#define stStaParam 16 /* Fortran static parameters */
/* These new symbol types have been recently added to SGI machines. */
#define stStruct 26 /* Beginning of block defining a struct type */
#define stUnion 27 /* Beginning of block defining a union type */
#define stEnum 28 /* Beginning of block defining an enum type */
#define stIndirect 34 /* Indirect type specification */
/* Pseudo-symbols - internal to debugger */
#define stStr 60 /* string */
#define stNumber 61 /* pure number (ie. 4 NOR 2+2) */
#define stExpr 62 /* 2+2 vs. 4 */
#define stType 63 /* post-coersion SER */
#define stMax 64
/* definitions for fields in TIR */
/* type qualifiers for ti.tq0 -> ti.(itqMax-1) */
#define tqNil 0 /* bt is what you see */
#define tqPtr 1 /* pointer */
#define tqProc 2 /* procedure */
#define tqArray 3 /* duh */
#define tqFar 4 /* longer addressing - 8086/8 land */
#define tqVol 5 /* volatile */
#define tqConst 6 /* const */
#define tqMax 8
/* basic types as seen in ti.bt */
#define btNil 0 /* undefined (also, enum members) */
#define btAdr 1 /* address - integer same size as pointer */
#define btChar 2 /* character */
#define btUChar 3 /* unsigned character */
#define btShort 4 /* short */
#define btUShort 5 /* unsigned short */
#define btInt 6 /* int */
#define btUInt 7 /* unsigned int */
#define btLong 8 /* long */
#define btULong 9 /* unsigned long */
#define btFloat 10 /* float (real) */
#define btDouble 11 /* Double (real) */
#define btStruct 12 /* Structure (Record) */
#define btUnion 13 /* Union (variant) */
#define btEnum 14 /* Enumerated */
#define btTypedef 15 /* defined via a typedef, isymRef points */
#define btRange 16 /* subrange of int */
#define btSet 17 /* pascal sets */
#define btComplex 18 /* fortran complex */
#define btDComplex 19 /* fortran double complex */
#define btIndirect 20 /* forward or unnamed typedef */
#define btFixedDec 21 /* Fixed Decimal */
#define btFloatDec 22 /* Float Decimal */
#define btString 23 /* Varying Length Character String */
#define btBit 24 /* Aligned Bit String */
#define btPicture 25 /* Picture */
#define btVoid 26 /* void */
#define btLongLong 27 /* long long */
#define btULongLong 28 /* unsigned long long */
#define btMax 64

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/*
* Copyright (c) 2003 The Regents of The University of Michigan
* 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 the copyright holders 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 AND 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.
*/
#include <string>
#include "ecoff_object.hh"
#include "functional_memory.hh"
#include "symtab.hh"
#include "trace.hh" // for DPRINTF
#include "exec_ecoff.h"
#include "coff_sym.h"
#include "coff_symconst.h"
using namespace std;
ObjectFile *
EcoffObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
{
if (((ecoff_filehdr *)data)->f_magic == ECOFF_MAGIC_ALPHA) {
// it's Alpha ECOFF
return new EcoffObject(fname, fd, len, data);
}
else {
return NULL;
}
}
EcoffObject::EcoffObject(const string &_filename, int _fd,
size_t _len, uint8_t *_data)
: ObjectFile(_filename, _fd, _len, _data)
{
execHdr = (ecoff_exechdr *)fileData;
fileHdr = &(execHdr->f);
aoutHdr = &(execHdr->a);
entry = aoutHdr->entry;
text.baseAddr = aoutHdr->text_start;
text.size = aoutHdr->tsize;
data.baseAddr = aoutHdr->data_start;
data.size = aoutHdr->dsize;
bss.baseAddr = aoutHdr->bss_start;
bss.size = aoutHdr->bsize;
DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n",
text.baseAddr, text.size, data.baseAddr, data.size,
bss.baseAddr, bss.size);
}
bool
EcoffObject::loadSections(FunctionalMemory *mem, bool loadPhys)
{
Addr textAddr = text.baseAddr;
Addr dataAddr = data.baseAddr;
if (loadPhys) {
textAddr &= (ULL(1) << 40) - 1;
dataAddr &= (ULL(1) << 40) - 1;
}
// Since we don't really have an MMU and all memory is
// zero-filled, there's no need to set up the BSS segment.
mem->prot_write(textAddr, fileData + ECOFF_TXTOFF(execHdr), text.size);
mem->prot_write(dataAddr, fileData + ECOFF_DATOFF(execHdr), data.size);
return true;
}
bool
EcoffObject::loadGlobalSymbols(SymbolTable *symtab)
{
if (!symtab)
return false;
if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) {
cprintf("wrong magic\n");
return false;
}
ecoff_symhdr *syms = (ecoff_symhdr *)(fileData + fileHdr->f_symptr);
if (syms->magic != magicSym2) {
cprintf("bad symbol header magic\n");
exit(1);
}
ecoff_extsym *ext_syms = (ecoff_extsym *)(fileData + syms->cbExtOffset);
char *ext_strings = (char *)(fileData + syms->cbSsExtOffset);
for (int i = 0; i < syms->iextMax; i++) {
ecoff_sym *entry = &(ext_syms[i].asym);
if (entry->iss != -1)
symtab->insert(entry->value, ext_strings + entry->iss);
}
return true;
}
bool
EcoffObject::loadLocalSymbols(SymbolTable *symtab)
{
if (!symtab)
return false;
if (fileHdr->f_magic != ECOFF_MAGIC_ALPHA) {
cprintf("wrong magic\n");
return false;
}
ecoff_symhdr *syms = (ecoff_symhdr *)(fileData + fileHdr->f_symptr);
if (syms->magic != magicSym2) {
cprintf("bad symbol header magic\n");
exit(1);
}
ecoff_sym *local_syms = (ecoff_sym *)(fileData + syms->cbSymOffset);
char *local_strings = (char *)(fileData + syms->cbSsOffset);
ecoff_fdr *fdesc = (ecoff_fdr *)(fileData + syms->cbFdOffset);
for (int i = 0; i < syms->ifdMax; i++) {
ecoff_sym *entry = (ecoff_sym *)(local_syms + fdesc[i].isymBase);
char *strings = (char *)(local_strings + fdesc[i].issBase);
for (int j = 0; j < fdesc[i].csym; j++) {
if (entry[j].st == stGlobal || entry[j].st == stProc)
if (entry[j].iss != -1)
symtab->insert(entry[j].value, strings + entry[j].iss);
}
}
for (int i = 0; i < syms->isymMax; i++) {
ecoff_sym *entry = &(local_syms[i]);
if (entry->st == stProc)
symtab->insert(entry->value, local_strings + entry->iss);
}
return true;
}

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/*
* Copyright (c) 2003 The Regents of The University of Michigan
* 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 the copyright holders 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 AND 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 __ECOFF_OBJECT_HH__
#define __ECOFF_OBJECT_HH__
#include "object_file.hh"
// forward decls: avoid including exec_ecoff.h here
struct ecoff_exechdr;
struct ecoff_filehdr;
struct ecoff_aouthdr;
class EcoffObject : public ObjectFile
{
protected:
ecoff_exechdr *execHdr;
ecoff_filehdr *fileHdr;
ecoff_aouthdr *aoutHdr;
EcoffObject(const std::string &_filename, int _fd,
size_t _len, uint8_t *_data);
public:
virtual ~EcoffObject() {}
virtual bool loadSections(FunctionalMemory *mem,
bool loadPhys = false);
virtual bool loadGlobalSymbols(SymbolTable *symtab);
virtual bool loadLocalSymbols(SymbolTable *symtab);
static ObjectFile *tryFile(const std::string &fname, int fd,
size_t len, uint8_t *data);
};
#endif // __ECOFF_OBJECT_HH__

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/*
* Copyright (c) 2003 The Regents of The University of Michigan
* 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 the copyright holders 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 AND 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.
*/
#include <string>
#include "elf_object.hh"
#include "functional_memory.hh"
#include "symtab.hh"
#include "trace.hh" // for DPRINTF
#include "exec_elf.h"
using namespace std;
ObjectFile *
ElfObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
{
if (memcmp(((Elf64_Ehdr *)data)->e_ident, ELFMAG, SELFMAG) == 0) {
// for now we'll assume it's a 64-bit Alpha binary
return new ElfObject(fname, fd, len, data);
}
else {
return NULL;
}
}
ElfObject::ElfObject(const string &_filename, int _fd,
size_t _len, uint8_t *_data)
: ObjectFile(_filename, _fd, _len, _data)
{
ehdr = (Elf64_Ehdr *)fileData;
entry = ehdr->e_entry;
phdr = (Elf64_Phdr *)(fileData + ehdr->e_phoff);
assert(sizeof(Elf64_Phdr) == ehdr->e_phentsize);
bool foundText = false;
bool foundData = false;
for (int i = 0; i < ehdr->e_phnum; ++i) {
Elf64_Phdr *p = &phdr[i];
// for now we don't care about non-loadable segments
if (!(p->p_type & PT_LOAD))
continue;
if (p->p_flags & PF_X) {
// executable: must be text
assert(!foundText);
foundText = true;
textPhdrIdx = i;
text.baseAddr = p->p_vaddr;
text.size = p->p_filesz;
assert(p->p_filesz == p->p_memsz);
}
else {
assert(p->p_flags & PF_R);
assert(!foundData);
foundData = true;
dataPhdrIdx = i;
data.baseAddr = p->p_vaddr;
data.size = p->p_filesz;
bss.baseAddr = data.baseAddr + data.size;
bss.size = p->p_memsz - p->p_filesz;
}
}
assert(foundText && foundData);
DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n",
text.baseAddr, text.size, data.baseAddr, data.size,
bss.baseAddr, bss.size);
}
bool
ElfObject::loadSections(FunctionalMemory *mem, bool loadPhys)
{
Addr textAddr = text.baseAddr;
Addr dataAddr = data.baseAddr;
if (loadPhys) {
textAddr &= (ULL(1) << 40) - 1;
dataAddr &= (ULL(1) << 40) - 1;
}
// Since we don't really have an MMU and all memory is
// zero-filled, there's no need to set up the BSS segment.
if (text.size != 0)
mem->prot_write(textAddr, fileData + phdr[textPhdrIdx].p_offset,
text.size);
if (data.size != 0)
mem->prot_write(dataAddr, fileData + phdr[dataPhdrIdx].p_offset,
data.size);
return true;
}
bool
ElfObject::loadGlobalSymbols(SymbolTable *symtab)
{
// symbols not supported yet
return false;
}
bool
ElfObject::loadLocalSymbols(SymbolTable *symtab)
{
// symbols not supported yet
return false;
}

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/*
* Copyright (c) 2003 The Regents of The University of Michigan
* 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 the copyright holders 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 AND 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 __ELF_OBJECT_HH__
#define __ELF_OBJECT_HH__
#include "object_file.hh"
// forward decls: avoid including exec_elf.hh here
struct Elf64_Ehdr;
struct Elf64_Phdr;
class ElfObject : public ObjectFile
{
protected:
Elf64_Ehdr *ehdr;
Elf64_Phdr *phdr;
int textPhdrIdx;
int dataPhdrIdx;
ElfObject(const std::string &_filename, int _fd,
size_t _len, uint8_t *_data);
public:
virtual ~ElfObject() {}
virtual bool loadSections(FunctionalMemory *mem,
bool loadPhys = false);
virtual bool loadGlobalSymbols(SymbolTable *symtab);
virtual bool loadLocalSymbols(SymbolTable *symtab);
static ObjectFile *tryFile(const std::string &fname, int fd,
size_t len, uint8_t *data);
};
#endif // __ELF_OBJECT_HH__

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/* $Id$ */
/*
* Taken from NetBSD sys/exec_aout.h
*/
/* $NetBSD: exec_aout.h,v 1.29 2002/12/10 17:14:31 thorpej Exp $ */
/*
* Copyright (c) 1993, 1994 Christopher G. Demetriou
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 _SYS_EXEC_AOUT_H_
#define _SYS_EXEC_AOUT_H_
#ifndef N_PAGSIZ
#define N_PAGSIZ(ex) (AOUT_LDPGSZ)
#endif
/* a_magic */
#define OMAGIC 0407 /* old impure format */
#define NMAGIC 0410 /* read-only text */
#define ZMAGIC 0413 /* demand load format */
#define N_ALIGN(ex,x) \
(N_GETMAGIC(ex) == ZMAGIC ? \
((x) + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1) : (x))
/* Valid magic number check. */
#define N_BADMAG(ex) \
(N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \
N_GETMAGIC(ex) != ZMAGIC)
#include "aout_machdep.h"
#endif /* !_SYS_EXEC_AOUT_H_ */

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/* $Id$ */
/*
* Taken from NetBSD sys/exec_ecoff.h
*/
/* $NetBSD: exec_ecoff.h,v 1.13 2003/01/18 09:53:18 thorpej Exp $ */
/*
* Copyright (c) 1994 Adam Glass
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Adam Glass.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 _SYS_EXEC_ECOFF_H_
#define _SYS_EXEC_ECOFF_H_
#include "ecoff_machdep.h"
struct ecoff_filehdr {
coff_ushort f_magic; /* magic number */
coff_ushort f_nscns; /* # of sections */
coff_uint f_timdat; /* time and date stamp */
coff_ulong f_symptr; /* file offset of symbol table */
coff_uint f_nsyms; /* # of symbol table entries */
coff_ushort f_opthdr; /* sizeof the optional header */
coff_ushort f_flags; /* flags??? */
};
struct ecoff_aouthdr {
coff_ushort magic;
coff_ushort vstamp;
ECOFF_PAD
coff_ulong tsize;
coff_ulong dsize;
coff_ulong bsize;
coff_ulong entry;
coff_ulong text_start;
coff_ulong data_start;
coff_ulong bss_start;
ECOFF_MACHDEP;
};
struct ecoff_scnhdr { /* needed for size info */
char s_name[8]; /* name */
coff_ulong s_paddr; /* physical addr? for ROMing?*/
coff_ulong s_vaddr; /* virtual addr? */
coff_ulong s_size; /* size */
coff_ulong s_scnptr; /* file offset of raw data */
coff_ulong s_relptr; /* file offset of reloc data */
coff_ulong s_lnnoptr; /* file offset of line data */
coff_ushort s_nreloc; /* # of relocation entries */
coff_ushort s_nlnno; /* # of line entries */
coff_uint s_flags; /* flags */
};
struct ecoff_exechdr {
struct ecoff_filehdr f;
struct ecoff_aouthdr a;
};
#define ECOFF_HDR_SIZE (sizeof(struct ecoff_exechdr))
#define ECOFF_OMAGIC 0407
#define ECOFF_NMAGIC 0410
#define ECOFF_ZMAGIC 0413
#define ECOFF_ROUND(value, by) \
(((value) + (by) - 1) & ~((by) - 1))
#define ECOFF_BLOCK_ALIGN(ep, value) \
((ep)->a.magic == ECOFF_ZMAGIC ? ECOFF_ROUND((value), ECOFF_LDPGSZ) : \
(value))
#define ECOFF_TXTOFF(ep) \
((ep)->a.magic == ECOFF_ZMAGIC ? 0 : \
ECOFF_ROUND(ECOFF_HDR_SIZE + (ep)->f.f_nscns * \
sizeof(struct ecoff_scnhdr), ECOFF_SEGMENT_ALIGNMENT(ep)))
#define ECOFF_DATOFF(ep) \
(ECOFF_BLOCK_ALIGN((ep), ECOFF_TXTOFF(ep) + (ep)->a.tsize))
#define ECOFF_SEGMENT_ALIGN(ep, value) \
(ECOFF_ROUND((value), ((ep)->a.magic == ECOFF_ZMAGIC ? ECOFF_LDPGSZ : \
ECOFF_SEGMENT_ALIGNMENT(ep))))
#endif /* !_SYS_EXEC_ECOFF_H_ */

150
base/object_file.cc
View file

@ -36,138 +36,80 @@
#include <unistd.h>
#include "cprintf.hh"
#include "ecoff.hh"
#include "object_file.hh"
#include "symtab.hh"
#include "ecoff_object.hh"
#include "aout_object.hh"
#include "elf_object.hh"
using namespace std;
ObjectFile::ObjectFile()
: descriptor(-1), data(NULL)
{}
ObjectFile::ObjectFile(const string &_filename, int _fd,
size_t _len, uint8_t *_data)
: filename(_filename), descriptor(_fd), fileData(_data), len(_len)
{
}
ObjectFile::ObjectFile(string file)
: descriptor(-1), data(NULL)
{ open(file); }
ObjectFile::~ObjectFile()
{ close(); }
bool
ObjectFile::open(string file_name)
{
close();
name = file_name;
descriptor = ::open(name.c_str(), O_RDONLY);
if (descriptor < 0)
return false;
len = (size_t)::lseek(descriptor, 0, SEEK_END);
data = (uint8_t *)::mmap(NULL, len, PROT_READ, MAP_SHARED, descriptor, 0);
if (data == MAP_FAILED)
return false;
postOpen();
return true;
}
void
ObjectFile::close()
{
if (descriptor >= 0)
if (descriptor >= 0) {
::close(descriptor);
if (data)
::munmap(data, len);
descriptor = -1;
}
void
EcoffObject::postOpen()
if (fileData) {
::munmap(fileData, len);
fileData = NULL;
}
}
ObjectFile *
createObjectFile(const string &fname)
{
exec = &(((EcoffExecHeader *)data)->f);
aout = &(((EcoffExecHeader *)data)->a);
text_off = aout->text_start;
data_off = aout->data_start;
bss_off = aout->bss_start;
text_size = aout->tsize;
data_size = aout->dsize;
bss_size = aout->bsize;
// open the file
int fd = open(fname.c_str(), O_RDONLY);
if (fd < 0) {
return NULL;
}
bool
EcoffObject::loadGlobals(SymbolTable *symtab)
{
if (!symtab)
return false;
// find the length of the file by seeking to the end
size_t len = (size_t)lseek(fd, 0, SEEK_END);
if (exec->f_magic != ALPHAMAGIC) {
cprintf("wrong magic\n");
return false;
// mmap the whole shebang
uint8_t *fileData =
(uint8_t *)mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0);
if (fileData == MAP_FAILED) {
close(fd);
return NULL;
}
EcoffSymHeader *syms = (EcoffSymHeader *)(data + exec->f_symptr);
if (syms->magic != ECOFF_SYM_MAGIC) {
cprintf("bad symbol header magic\n");
exit(1);
ObjectFile *fileObj = NULL;
// figure out what we have here
if ((fileObj = EcoffObject::tryFile(fname, fd, len, fileData)) != NULL) {
return fileObj;
}
EcoffExtSymEntry *ext_syms =
(EcoffExtSymEntry *)(data + syms->cbExtOffset);
char *ext_strings = (char *)(data + syms->cbSsExtOffset);
for (int i = 0; i < syms->iextMax; i++) {
EcoffSymEntry *entry = &(ext_syms[i].asym);
if (entry->iss != -1)
symtab->insert(entry->value, ext_strings + entry->iss);
if ((fileObj = AoutObject::tryFile(fname, fd, len, fileData)) != NULL) {
return fileObj;
}
return true;
if ((fileObj = ElfObject::tryFile(fname, fd, len, fileData)) != NULL) {
return fileObj;
}
bool
EcoffObject::loadLocals(SymbolTable *symtab)
{
if (!symtab)
return false;
if (exec->f_magic != ALPHAMAGIC) {
cprintf("wrong magic\n");
return false;
}
EcoffSymHeader *syms = (EcoffSymHeader *)(data + exec->f_symptr);
if (syms->magic != ECOFF_SYM_MAGIC) {
cprintf("bad symbol header magic\n");
exit(1);
}
EcoffSymEntry *local_syms = (EcoffSymEntry *)(data + syms->cbSymOffset);
char *local_strings = (char *)(data + syms->cbSsOffset);
EcoffFileDesc *fdesc = (EcoffFileDesc *)(data + syms->cbFdOffset);
for (int i = 0; i < syms->ifdMax; i++) {
EcoffSymEntry *entry =
(EcoffSymEntry *)(local_syms + fdesc[i].isymBase);
char *strings = (char *)(local_strings + fdesc[i].issBase);
for (int j = 0; j < fdesc[i].csym; j++) {
if (entry[j].st == 1 || entry[j].st == 6)
if (entry[j].iss != -1)
symtab->insert(entry[j].value, strings + entry[j].iss);
}
}
for (int i = 0; i < syms->isymMax; i++) {
EcoffSymEntry *entry = &(local_syms[i]);
if (entry->st == 6)
if (entry->st == 1 || entry->st == 6)
symtab->insert(entry->value, local_strings + entry->iss);
}
return true;
// don't know what it is
close(fd);
munmap(fileData, len);
return NULL;
}

66
base/object_file.hh
View file

@ -29,64 +29,60 @@
#ifndef __OBJECT_FILE_HH__
#define __OBJECT_FILE_HH__
#include "ecoff.hh"
#include "isa_traits.hh" // for Addr
class FunctionalMemory;
class SymbolTable;
class ObjectFile
{
protected:
std::string name;
const std::string filename;
int descriptor;
uint8_t *data;
uint8_t *fileData;
size_t len;
ObjectFile(const std::string &_filename, int _fd,
size_t _len, uint8_t *_data);
public:
ObjectFile();
explicit ObjectFile(std::string file);
virtual ~ObjectFile();
bool open(std::string file);
void close();
virtual bool loadGlobals(SymbolTable *symtab) = 0;
virtual bool loadLocals(SymbolTable *symtab) = 0;
virtual void postOpen() = 0;
virtual bool loadSections(FunctionalMemory *mem,
bool loadPhys = false) = 0;
virtual bool loadGlobalSymbols(SymbolTable *symtab) = 0;
virtual bool loadLocalSymbols(SymbolTable *symtab) = 0;
protected:
Addr text_off;
Addr data_off;
Addr bss_off;
size_t text_size;
size_t data_size;
size_t bss_size;
public:
Addr textOffset() const { return text_off; }
Addr dataOffset() const { return data_off; }
Addr bssOffset() const { return bss_off; }
size_t textSize() const { return text_size; }
size_t dataSize() const { return data_size; }
size_t bssSize() const { return bss_size; }
struct Section {
Addr baseAddr;
size_t size;
};
class EcoffObject : public ObjectFile
{
protected:
EcoffFileHeader *exec;
EcoffAOutHeader *aout;
Addr entry;
Addr globalPtr;
Section text;
Section data;
Section bss;
public:
EcoffObject() {}
explicit EcoffObject(std::string file) { open(file); }
virtual ~EcoffObject() {}
Addr entryPoint() const { return entry; }
Addr globalPointer() const { return globalPtr; }
virtual bool loadGlobals(SymbolTable *symtab);
virtual bool loadLocals(SymbolTable *symtab);
virtual void postOpen();
Addr textBase() const { return text.baseAddr; }
Addr dataBase() const { return data.baseAddr; }
Addr bssBase() const { return bss.baseAddr; }
size_t textSize() const { return text.size; }
size_t dataSize() const { return data.size; }
size_t bssSize() const { return bss.size; }
};
ObjectFile *createObjectFile(const std::string &fname);
#endif // __OBJECT_FILE_HH__

85
sim/prog.cc
View file

@ -38,7 +38,7 @@
#include "eio.hh"
#include "thread.hh"
#include "fake_syscall.hh"
#include "loader.hh"
#include "object_file.hh"
#include "exec_context.hh"
#include "smt.hh"
@ -219,12 +219,93 @@ DEFINE_SIM_OBJECT_CLASS_NAME("Process object", Process)
//
////////////////////////////////////////////////////////////////////////
static void
copyStringArray(vector<string> &strings, Addr array_ptr, Addr data_ptr,
FunctionalMemory *memory)
{
for (int i = 0; i < strings.size(); ++i) {
memory->access(Write, array_ptr, &data_ptr, sizeof(Addr));
memory->writeString(data_ptr, strings[i].c_str());
array_ptr += sizeof(Addr);
data_ptr += strings[i].size() + 1;
}
// add NULL terminator
data_ptr = 0;
memory->access(Write, array_ptr, &data_ptr, sizeof(Addr));
}
LiveProcess::LiveProcess(const string &name,
int stdin_fd, int stdout_fd, int stderr_fd,
vector<string> &argv, vector<string> &envp)
: Process(name, stdin_fd, stdout_fd, stderr_fd)
{
smt_load_prog(argv, envp, init_regs, this);
prog_fname = argv[0];
ObjectFile *objFile = createObjectFile(prog_fname);
if (objFile == NULL) {
fatal("Can't load object file %s", prog_fname);
}
prog_entry = objFile->entryPoint();
text_base = objFile->textBase();
text_size = objFile->textSize();
data_base = objFile->dataBase();
data_size = objFile->dataSize() + objFile->bssSize();
brk_point = ROUND_UP(data_base + data_size, VMPageSize);
// load object file into target memory
objFile->loadSections(memory);
// Set up stack. On Alpha, stack goes below text section. This
// code should get moved to some architecture-specific spot.
stack_base = text_base - (409600+4096);
// Set pointer for next thread stack. Reserve 8M for main stack.
next_thread_stack_base = stack_base - (8 * 1024 * 1024);
// Calculate how much space we need for arg & env arrays.
int argv_array_size = sizeof(Addr) * (argv.size() + 1);
int envp_array_size = sizeof(Addr) * (envp.size() + 1);
int arg_data_size = 0;
for (int i = 0; i < argv.size(); ++i) {
arg_data_size += argv[i].size() + 1;
}
int env_data_size = 0;
for (int i = 0; i < envp.size(); ++i) {
env_data_size += envp[i].size() + 1;
}
int space_needed =
argv_array_size + envp_array_size + arg_data_size + env_data_size;
// for SimpleScalar compatibility
if (space_needed < 16384)
space_needed = 16384;
// set bottom of stack
stack_min = stack_base - space_needed;
// align it
stack_min &= ~7;
stack_size = stack_base - stack_min;
// map out initial stack contents
Addr argv_array_base = stack_min + sizeof(uint64_t); // room for argc
Addr envp_array_base = argv_array_base + argv_array_size;
Addr arg_data_base = envp_array_base + envp_array_size;
Addr env_data_base = arg_data_base + arg_data_size;
// write contents to stack
uint64_t argc = argv.size();
memory->access(Write, stack_min, &argc, sizeof(uint64_t));
copyStringArray(argv, argv_array_base, arg_data_base, memory);
copyStringArray(envp, envp_array_base, env_data_base, memory);
init_regs->intRegFile[ArgumentReg0] = argc;
init_regs->intRegFile[ArgumentReg1] = argv_array_base;
init_regs->intRegFile[StackPointerReg] = stack_min;
init_regs->intRegFile[GlobalPointerReg] = objFile->globalPointer();
init_regs->pc = prog_entry;
init_regs->npc = prog_entry + sizeof(MachInst);
}

1
sim/prog.hh
View file

@ -86,7 +86,6 @@ class Process : public SimObject
Addr brk_point; // top of the data segment
Addr environ_base; // environment base address
Addr stack_base; // stack segment base (highest address)
unsigned stack_size; // initial stack size
Addr stack_min; // lowest address accessed on the stack

36
sim/system.cc
View file

@ -26,7 +26,6 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "kernel_loader.hh"
#include "exec_context.hh"
#include "object_file.hh"
#include "memory_control.hh"
@ -68,28 +67,47 @@ System::System(const std::string _name,
kernelSymtab = new SymbolTable;
consoleSymtab = new SymbolTable;
EcoffObject kernel(kernel_path);
EcoffObject console(console_path);
ObjectFile *kernel = createObjectFile(kernel_path);
if (kernel == NULL)
fatal("Could not load kernel file %s", kernel_path);
if (!kernel.loadGlobals(kernelSymtab))
ObjectFile *console = createObjectFile(console_path);
if (console == NULL)
fatal("Could not load console file %s", console_path);
if (!kernel->loadGlobalSymbols(kernelSymtab))
panic("could not load kernel symbols\n");
if (!console.loadGlobals(consoleSymtab))
if (!console->loadGlobalSymbols(consoleSymtab))
panic("could not load console symbols\n");
// Load pal file
loadPal(palcode, physmem, PAL_BASE);
ObjectFile *pal = createObjectFile(palcode);
if (pal == NULL)
fatal("Could not load PALcode file %s", palcode);
pal->loadSections(physmem, true);
// copy of initial reg file contents
initRegs = new RegFile;
memset(initRegs, 0, sizeof(RegFile));
// Load console file
loadKernel(console_path, physmem);
console->loadSections(physmem, true);
// Load kernel file
loadKernel(kernel_path, physmem, initRegs,
&kernelStart, &kernelEnd, &kernelEntry);
kernel->loadSections(physmem, true);
kernelStart = kernel->textBase();
kernelEnd = kernel->bssBase() + kernel->bssSize();
kernelEntry = kernel->entryPoint();
DPRINTF(Loader, "Kernel start = %#x\n"
"Kernel end = %#x\n"
"Kernel entry = %#x\n",
kernelStart, kernelEnd, kernelEntry);
// Setup kernel boot parameters
initRegs->pc = 0x4001;
initRegs->npc = initRegs->pc + sizeof(MachInst);
DPRINTF(Loader, "Kernel loaded...\n");