1 /* i7094_binloader.c: IBM 7094 simulator interface
2
3 Copyright (c) 2008, David G. Pitts
4
5 Permission is hereby granted, free of charge, to any person obtaining a
6 copy of this software and associated documentation files (the "Software"),
7 to deal in the Software without restriction, including without limitation
8 the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 and/or sell copies of the Software, and to permit persons to whom the
10 Software is furnished to do so, subject to the following conditions:
11
12 The above copyright notice and this permission notice shall be included in
13 all copies or substantial portions of the Software.
14
15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21
22 Except as contained in this notice, the name of the author shall not be
23 used in advertising or otherwise to promote the sale, use or other dealings
24 in this Software without prior written authorization from the author.
25 */
26 /***********************************************************************
27 *
28 * binloader.h - IBM 7090 emulator binary loader header.
29 *
30 * Changes:
31 * 10/20/03 DGP Original.
32 * 12/28/04 DGP Changed for new object formats.
33 *
34 ***********************************************************************/
35
36 #define IBSYSSYM '$' /* Marks end of object file */
37 #define WORDPERREC 5 /* Object words per record */
38 #define LOADADDR 0200 /* Default load address */
39 #define OBJRECLEN 80 /* Object record length */
40 #define CHARWORD 12 /* Characters per word */
41
42 /*
43 ** Object tags
44 */
45
46 #define IDT_TAG '0' /* 0SSSSSS0LLLLL */
47 #define ABSENTRY_TAG '1' /* 10000000AAAAA */
48 #define RELENTRY_TAG '2' /* 20000000RRRRR */
49 #define ABSEXTRN_TAG '3' /* 3SSSSSS0AAAAA */
50 #define RELEXTRN_TAG '4' /* 4SSSSSS0RRRRR */
51 #define ABSGLOBAL_TAG '5' /* 5SSSSSS0AAAAA */
52 #define RELGLOBAL_TAG '6' /* 6SSSSSS0RRRRR */
53 #define ABSORG_TAG '7' /* 70000000AAAAA */
54 #define RELORG_TAG '8' /* 80000000RRRRR */
55 #define ABSDATA_TAG '9' /* 9AAAAAAAAAAAA */
56 #define RELADDR_TAG 'A' /* AAAAAAAARRRRR */
57 #define RELDECR_TAG 'B' /* BARRRRRAAAAAA */
58 #define RELBOTH_TAG 'C' /* CARRRRRARRRRR */
59 #define BSS_TAG 'D' /* D0000000PPPPP */
60 #define ABSXFER_TAG 'E' /* E0000000RRRRR */
61 #define RELXFER_TAG 'F' /* F0000000RRRRR */
62 #define EVEN_TAG 'G' /* G0000000RRRRR */
63 #define FAPCOMMON_TAG 'H' /* H0000000AAAAA */
64
65 /* Where:
66 * SSSSSS - Symbol
67 * LLLLLL - Length of module
68 * AAAAAA - Absolute field
69 * RRRRRR - Relocatable field
70 * PPPPPP - PC offset field
71 */
72
73 /***********************************************************************
74 *
75 * binloader.c - IBM 7090 emulator binary loader routines for ASM7090
76 * and LNK7090 object files.
77 *
78 * Changes:
79 * 10/20/03 DGP Original.
80 * 12/28/04 DGP Changed for new object formats.
81 * 02/14/05 DGP Detect IBSYSSYM for EOF.
82 * 06/09/06 DGP Make simh callable.
83 *
84 ***********************************************************************/
85
86 #include "i7094_defs.h"
87
88 extern t_uint64 *M;
89 extern uint32 PC;
90
91 t_stat
binloader(FILE * fd,char * file,int loadpt)92 binloader (FILE *fd, char *file, int loadpt)
93 {
94 #ifdef DEBUGLOADER
95 FILE *lfd;
96 #endif
97 int transfer = FALSE;
98 int loadaddr = LOADADDR;
99 int curraddr = LOADADDR;
100 char inbuf[OBJRECLEN+2];
101
102 #ifdef DEBUGLOADER
103 lfd = fopen ("load.log", "w");
104 fprintf (lfd, "binloader: file = '%s', loadpt = %d\n", file, loadpt);
105 #endif
106
107 if (loadpt > 0)
108 {
109 loadaddr = loadpt;
110 curraddr = loadpt;
111 }
112
113 while (fgets (inbuf, sizeof(inbuf), fd))
114 {
115 char *op = inbuf;
116 int i;
117
118 if (*op == IBSYSSYM) /* End of object marker */
119 break;
120
121 for (i = 0; i < WORDPERREC; i++)
122 {
123 char otag;
124 char item[16];
125 t_uint64 ldata;
126
127 otag = *op++;
128 if (otag == ' ')
129 break;
130 strncpy (item, op, CHARWORD);
131 item[CHARWORD] = '\0';
132 #ifdef WIN32
133 sscanf (item, "%I64o", &ldata);
134 #else
135 sscanf (item, "%llo", &ldata);
136 #endif
137
138 #ifdef DEBUGLOADER
139 fprintf (lfd, "loadaddr = %05o, curraddr = %05o\n",
140 loadaddr, curraddr);
141 fprintf (lfd, " otag = %c, item = %s\n", otag, item);
142 fprintf (lfd, " ldata = %12.12o\n", ldata);
143 #endif
144
145 switch (otag)
146 {
147 case IDT_TAG:
148 break;
149
150 case ABSORG_TAG:
151 curraddr = loadaddr = (int32) ldata & AMASK;
152 break;
153
154 case RELORG_TAG:
155 curraddr = (int32) (ldata + loadaddr) & AMASK;
156 break;
157
158 case BSS_TAG:
159 curraddr = (int32) (curraddr + ldata) & AMASK;
160 break;
161
162 case RELBOTH_TAG:
163 ldata = ldata + loadaddr + (loadaddr << INST_V_DEC);
164 goto STORE;
165
166 case RELDECR_TAG:
167 ldata = ldata + (loadaddr << INST_V_DEC);
168 goto STORE;
169
170 case RELADDR_TAG:
171 ldata = ldata + loadaddr;
172
173 case ABSDATA_TAG:
174 STORE:
175 #ifdef DEBUGLOADER
176 fprintf (lfd, " M[%05o] = %12.12o\n", curraddr, ldata);
177 #endif
178 M[curraddr] = ldata & DMASK;
179 curraddr++;
180 break;
181
182 case ABSXFER_TAG:
183 transfer = TRUE;
184 case ABSENTRY_TAG:
185 PC = (uint32) ldata & AMASK;
186 #ifdef DEBUGLOADER
187 fprintf (lfd, " PC = %05o\n", PC);
188 #endif
189 if (transfer)
190 goto GOSTART;
191 break;
192
193 case RELXFER_TAG:
194 transfer = TRUE;
195 case RELENTRY_TAG:
196 ldata = (ldata + loadaddr) & AMASK;
197 PC = (uint32) ldata & AMASK;
198 #ifdef DEBUGLOADER
199 fprintf (lfd, " PC = %05o\n", PC);
200 #endif
201 if (transfer)
202 goto GOSTART;
203 break;
204
205 default: ;
206 }
207 op += CHARWORD;
208 }
209 }
210
211 GOSTART:
212 #ifdef DEBUGLOADER
213 fclose (lfd);
214 #endif
215
216 return SCPE_OK;
217 }
218