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/* i7094_binloader.c: IBM 7094 simulator interface
Copyright (c) 2008, David G. Pitts
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of the author shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the author.
*/
/***********************************************************************
*
* binloader.h - IBM 7090 emulator binary loader header.
*
* Changes:
* 10/20/03 DGP Original.
* 12/28/04 DGP Changed for new object formats.
*
***********************************************************************/
#define IBSYSSYM '$' /* Marks end of object file */
#define WORDPERREC 5 /* Object words per record */
#define LOADADDR 0200 /* Default load address */
#define OBJRECLEN 80 /* Object record length */
#define CHARWORD 12 /* Characters per word */
/*
** Object tags
*/
#define IDT_TAG '0' /* 0SSSSSS0LLLLL */
#define ABSENTRY_TAG '1' /* 10000000AAAAA */
#define RELENTRY_TAG '2' /* 20000000RRRRR */
#define ABSEXTRN_TAG '3' /* 3SSSSSS0AAAAA */
#define RELEXTRN_TAG '4' /* 4SSSSSS0RRRRR */
#define ABSGLOBAL_TAG '5' /* 5SSSSSS0AAAAA */
#define RELGLOBAL_TAG '6' /* 6SSSSSS0RRRRR */
#define ABSORG_TAG '7' /* 70000000AAAAA */
#define RELORG_TAG '8' /* 80000000RRRRR */
#define ABSDATA_TAG '9' /* 9AAAAAAAAAAAA */
#define RELADDR_TAG 'A' /* AAAAAAAARRRRR */
#define RELDECR_TAG 'B' /* BARRRRRAAAAAA */
#define RELBOTH_TAG 'C' /* CARRRRRARRRRR */
#define BSS_TAG 'D' /* D0000000PPPPP */
#define ABSXFER_TAG 'E' /* E0000000RRRRR */
#define RELXFER_TAG 'F' /* F0000000RRRRR */
#define EVEN_TAG 'G' /* G0000000RRRRR */
#define FAPCOMMON_TAG 'H' /* H0000000AAAAA */
/* Where:
* SSSSSS - Symbol
* LLLLLL - Length of module
* AAAAAA - Absolute field
* RRRRRR - Relocatable field
* PPPPPP - PC offset field
*/
/***********************************************************************
*
* binloader.c - IBM 7090 emulator binary loader routines for ASM7090
* and LNK7090 object files.
*
* Changes:
* 10/20/03 DGP Original.
* 12/28/04 DGP Changed for new object formats.
* 02/14/05 DGP Detect IBSYSSYM for EOF.
* 06/09/06 DGP Make simh callable.
*
***********************************************************************/
#include "i7094_defs.h"
extern t_uint64 *M;
extern uint32 PC;
t_stat
binloader (FILE *fd, char *file, int loadpt)
{
#ifdef DEBUGLOADER
FILE *lfd;
#endif
int transfer = FALSE;
int loadaddr = LOADADDR;
int curraddr = LOADADDR;
char inbuf[OBJRECLEN+2];
#ifdef DEBUGLOADER
lfd = fopen ("load.log", "w");
fprintf (lfd, "binloader: file = '%s', loadpt = %d\n", file, loadpt);
#endif
if (loadpt > 0)
{
loadaddr = loadpt;
curraddr = loadpt;
}
while (fgets (inbuf, sizeof(inbuf), fd))
{
char *op = inbuf;
int i;
if (*op == IBSYSSYM) /* End of object marker */
break;
for (i = 0; i < WORDPERREC; i++)
{
char otag;
char item[16];
t_uint64 ldata;
otag = *op++;
if (otag == ' ')
break;
strncpy (item, op, CHARWORD);
item[CHARWORD] = '\0';
sscanf (item, "%" LL_FMT "o", &ldata);
#ifdef DEBUGLOADER
fprintf (lfd, "loadaddr = %05o, curraddr = %05o\n",
loadaddr, curraddr);
fprintf (lfd, " otag = %c, item = %s\n", otag, item);
fprintf (lfd, " ldata = %12.12o\n", ldata);
#endif
switch (otag)
{
case IDT_TAG:
break;
case ABSORG_TAG:
curraddr = loadaddr = (int32) ldata & AMASK;
break;
case RELORG_TAG:
curraddr = (int32) (ldata + loadaddr) & AMASK;
break;
case BSS_TAG:
curraddr = (int32) (curraddr + ldata) & AMASK;
break;
case RELBOTH_TAG:
ldata = ldata + loadaddr + (loadaddr << INST_V_DEC);
goto STORE;
case RELDECR_TAG:
ldata = ldata + (loadaddr << INST_V_DEC);
goto STORE;
case RELADDR_TAG:
ldata = ldata + loadaddr;
case ABSDATA_TAG:
STORE:
#ifdef DEBUGLOADER
fprintf (lfd, " M[%05o] = %12.12o\n", curraddr, ldata);
#endif
M[curraddr] = ldata & DMASK;
curraddr++;
break;
case ABSXFER_TAG:
transfer = TRUE;
case ABSENTRY_TAG:
PC = (uint32) ldata & AMASK;
#ifdef DEBUGLOADER
fprintf (lfd, " PC = %05o\n", PC);
#endif
if (transfer)
goto GOSTART;
break;
case RELXFER_TAG:
transfer = TRUE;
case RELENTRY_TAG:
ldata = (ldata + loadaddr) & AMASK;
PC = (uint32) ldata & AMASK;
#ifdef DEBUGLOADER
fprintf (lfd, " PC = %05o\n", PC);
#endif
if (transfer)
goto GOSTART;
break;
default: ;
}
op += CHARWORD;
}
}
GOSTART:
#ifdef DEBUGLOADER
fclose (lfd);
#endif
return SCPE_OK;
}