First Commit of my working state

[simh.git] / I7094 / i7094_binloader.c

/* i7094_binloader.c: IBM 7094 simulator interface\r
\r
   Copyright (c) 2006, David G. Pitts\r
\r
   Permission is hereby granted, free of charge, to any person obtaining a\r
   copy of this software and associated documentation files (the "Software"),\r
   to deal in the Software without restriction, including without limitation\r
   the rights to use, copy, modify, merge, publish, distribute, sublicense,\r
   and/or sell copies of the Software, and to permit persons to whom the\r
   Software is furnished to do so, subject to the following conditions:\r
\r
   The above copyright notice and this permission notice shall be included in\r
   all copies or substantial portions of the Software.\r
\r
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL\r
   THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r
   IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
\r
   Except as contained in this notice, the name of the author shall not be\r
   used in advertising or otherwise to promote the sale, use or other dealings\r
   in this Software without prior written authorization from the author.\r
*/\r
/***********************************************************************\r
*\r
* binloader.h - IBM 7090 emulator binary loader header.\r
*\r
* Changes:\r
*   10/20/03   DGP   Original.\r
*   12/28/04   DGP   Changed for new object formats.\r
*	\r
***********************************************************************/\r
\r
#define IBSYSSYM	'$'		/* Marks end of object file */\r
#define WORDPERREC	5		/* Object words per record */\r
#define LOADADDR	0200		/* Default load address */\r
#define OBJRECLEN	80		/* Object record length */\r
#define CHARWORD	12		/* Characters per word */\r
\r
/*\r
** Object tags\r
*/\r
\r
#define IDT_TAG		'0'		/* 0SSSSSS0LLLLL */\r
#define ABSENTRY_TAG	'1'		/* 10000000AAAAA */\r
#define RELENTRY_TAG	'2'		/* 20000000RRRRR */\r
#define ABSEXTRN_TAG	'3'		/* 3SSSSSS0AAAAA */\r
#define RELEXTRN_TAG	'4'		/* 4SSSSSS0RRRRR */\r
#define ABSGLOBAL_TAG	'5'		/* 5SSSSSS0AAAAA */\r
#define RELGLOBAL_TAG	'6'		/* 6SSSSSS0RRRRR */\r
#define ABSORG_TAG	'7'		/* 70000000AAAAA */\r
#define RELORG_TAG	'8'		/* 80000000RRRRR */\r
#define ABSDATA_TAG	'9'		/* 9AAAAAAAAAAAA */\r
#define RELADDR_TAG 	'A'		/* AAAAAAAARRRRR */\r
#define RELDECR_TAG 	'B'		/* BARRRRRAAAAAA */\r
#define RELBOTH_TAG 	'C'		/* CARRRRRARRRRR */\r
#define BSS_TAG		'D'    		/* D0000000PPPPP */\r
#define ABSXFER_TAG	'E'		/* E0000000RRRRR */\r
#define RELXFER_TAG	'F'		/* F0000000RRRRR */\r
#define EVEN_TAG	'G'		/* G0000000RRRRR */\r
#define FAPCOMMON_TAG	'H'		/* H0000000AAAAA */\r
\r
/* Where:\r
 *    SSSSSS - Symbol\r
 *    LLLLLL - Length of module\r
 *    AAAAAA - Absolute field\r
 *    RRRRRR - Relocatable field\r
 *    PPPPPP - PC offset field\r
*/\r
\r
/***********************************************************************\r
*\r
* binloader.c - IBM 7090 emulator binary loader routines for ASM7090\r
*            and LNK7090 object files.\r
*\r
* Changes:\r
*   10/20/03   DGP   Original.\r
*   12/28/04   DGP   Changed for new object formats.\r
*   02/14/05   DGP   Detect IBSYSSYM for EOF.\r
*   06/09/06   DGP   Make simh callable.\r
*   \r
***********************************************************************/\r
\r
#include "i7094_defs.h"\r
\r
extern t_uint64 *M;\r
extern uint32 PC;\r
\r
t_stat\r
binloader (FILE *fd, char *file, int loadpt)\r
{\r
#ifdef DEBUGLOADER\r
   FILE *lfd;\r
#endif\r
   int transfer = FALSE;\r
   int loadaddr = LOADADDR;\r
   int curraddr = LOADADDR;\r
   char inbuf[OBJRECLEN+2];\r
\r
#ifdef DEBUGLOADER\r
   lfd = fopen ("load.log", "w");\r
   fprintf (lfd, "binloader: file = '%s', loadpt = %d\n", file, loadpt);\r
#endif\r
\r
   if (loadpt > 0)\r
   {\r
      loadaddr = loadpt;\r
      curraddr = loadpt;\r
   }\r
\r
   while (fgets (inbuf, sizeof(inbuf), fd))\r
   {\r
      char *op = inbuf;\r
      int i;\r
\r
      if (*op == IBSYSSYM)	/* End of object marker */\r
         break;\r
\r
      for (i = 0; i < WORDPERREC; i++)\r
      {\r
	char otag;\r
	char item[16];\r
	t_uint64 ldata;\r
\r
	otag = *op++;\r
	if (otag == ' ') break;\r
	strncpy (item, op, CHARWORD);\r
	item[CHARWORD] = '\0';\r
#ifdef WIN32\r
	sscanf (item, "%I64o", &ldata);\r
#else\r
	sscanf (item, "%llo", &ldata);\r
#endif\r
\r
#ifdef DEBUGLOADER\r
	fprintf (lfd, "loadaddr = %05o, curraddr = %05o\n",\r
		  loadaddr, curraddr);\r
	fprintf (lfd, "   otag = %c, item = %s\n", otag, item);\r
	fprintf (lfd, "   ldata = %12.12o\n", ldata);\r
#endif\r
\r
         switch (otag)\r
	{\r
	case IDT_TAG:\r
	    break;\r
\r
	case ABSORG_TAG:\r
	    curraddr = loadaddr = (int32) ldata & AMASK;\r
	    break;\r
\r
	case RELORG_TAG:\r
	    curraddr = (int32) (ldata + loadaddr) & AMASK;\r
	    break;\r
\r
	case BSS_TAG:\r
	    curraddr = (int32) (curraddr + ldata) & AMASK;\r
	    break;\r
\r
	case RELBOTH_TAG:\r
	    ldata = ldata + loadaddr + (loadaddr << INST_V_DEC);\r
	    goto STORE;\r
\r
	case RELDECR_TAG:\r
	    ldata = ldata + (loadaddr << INST_V_DEC);\r
	    goto STORE;\r
\r
	case RELADDR_TAG:\r
	    ldata = ldata + loadaddr;\r
\r
	case ABSDATA_TAG:\r
	STORE:\r
#ifdef DEBUGLOADER\r
	    fprintf (lfd, "   M[%05o] = %12.12o\n", curraddr, ldata);\r
#endif\r
	    M[curraddr] = ldata & DMASK;\r
	    curraddr++;\r
	    break;\r
\r
	case ABSXFER_TAG:\r
	    transfer = TRUE;\r
	case ABSENTRY_TAG:\r
	    PC = (uint32) ldata & AMASK;\r
#ifdef DEBUGLOADER\r
	    fprintf (lfd, "   PC = %05o\n", PC);\r
#endif\r
	    if (transfer) goto GOSTART;\r
	    break;\r
\r
	case RELXFER_TAG:\r
	    transfer = TRUE;\r
	case RELENTRY_TAG:\r
	    ldata = (ldata + loadaddr) & AMASK;\r
	    PC = (uint32) ldata & AMASK;\r
#ifdef DEBUGLOADER\r
	    fprintf (lfd, "   PC = %05o\n", PC);\r
#endif\r
	    if (transfer) goto GOSTART;\r
	    break;\r
\r
	default: ;\r
	}\r
	op += CHARWORD;\r
      }\r
   }\r
\r
GOSTART:\r
#ifdef DEBUGLOADER\r
   fclose (lfd);\r
#endif\r
\r
   return SCPE_OK;\r
}\r