Commit | Line | Data |
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28c97a66 | 1 | static char sccsid[] = "@(#)xeq.c 4.3 %G%"; |
e3075328 BJ |
2 | #include "head.h" |
3 | #include <a.out.h> | |
4 | #include <stab.h> | |
5 | struct user u; | |
6 | #include <stdio.h> | |
7 | INT signo; | |
8 | INT adrflg; | |
9 | INT pid; | |
10 | ADDR userpc; | |
11 | L_INT cntval; | |
12 | ||
13 | ||
14 | /* service routines for sub process control */ | |
15 | ||
16 | ||
17 | /* | |
18 | * single step until loc with descriptor format d is modified | |
19 | * return its new value. | |
20 | */ | |
21 | monex(loc, d) | |
22 | ADDR loc; char d; { | |
23 | register ADDR oldval; | |
24 | ||
25 | oldval = getval(loc, d, DSP); | |
26 | do { | |
27 | subpcs('s'); | |
28 | } while (oldval == getval(loc, d, DSP)); | |
29 | return(getval(loc, d, DSP)); | |
30 | } | |
31 | ||
32 | /* single step count source stmts */ | |
33 | singstep(count, cmd) | |
34 | char cmd; { | |
35 | register int thisline, curline; | |
36 | register struct proct *thisproc; | |
37 | ||
38 | if (sdbttym.sg_flags != userttym.sg_flags) | |
39 | stty(2, &userttym); | |
40 | dot = *(ADDR *) (((ADDR) &u) + PC); | |
41 | thisproc = adrtoprocp(dot); | |
42 | thisline = adrtolineno(dot); | |
43 | if (count == 0) count = 1; | |
44 | for(; count; count--) { | |
45 | do { | |
46 | if (cmd == 'S') { /* MACHINE DEPENDENT */ | |
47 | dot = *(ADDR *) (((ADDR) &u) + PC); | |
48 | if ((get(dot,ISP) & 0xff) == 0xfb){ /* calls */ | |
49 | int retaddr; | |
50 | subpcs('s'); | |
51 | retaddr = | |
52 | *(ADDR *) (((ADDR) &u) + USP) + 16; | |
53 | retaddr = dot = get(retaddr, DSP); | |
54 | subpcs('b'); | |
55 | subpcs('c'); | |
56 | dot = retaddr; | |
57 | subpcs('d'); | |
58 | dot = *(ADDR *) (((ADDR) &u) + PC); | |
59 | if (retaddr != dot && signo == 0) { | |
60 | gtty(2, &userttym); | |
61 | if (sdbttym.sg_flags != | |
62 | userttym.sg_flags) | |
63 | stty(2, &sdbttym); | |
64 | printf("Breakpoint at \n"); | |
65 | return; | |
66 | } | |
67 | continue; | |
68 | } | |
69 | } | |
70 | ||
71 | subpcs('s'); | |
72 | dot = *(ADDR *) (((ADDR) &u) + PC); | |
73 | curline = adrtolineno(dot); | |
74 | } while (!signo && | |
75 | ((thisproc == adrtoprocp(dot) && thisline == curline) || | |
76 | curline == -1)); | |
77 | gtty(2, &userttym); | |
78 | if (sdbttym.sg_flags != userttym.sg_flags) | |
79 | stty(2, &sdbttym); | |
80 | if (signo) return; | |
81 | } | |
82 | } | |
83 | ||
84 | doscall() { | |
85 | int subargs[NUMARGS]; | |
86 | /* subargs[0] = address, | |
87 | * subargs[1] = number of arguments | |
88 | * subargs[2:NUMARGS] = actual arguments | |
89 | */ | |
90 | union { | |
91 | int w[128-NUMARGS]; | |
92 | char c[4*(128-NUMARGS)]; | |
93 | }substr; | |
94 | ||
95 | register int i, numchars, *subargp; | |
96 | register char ch; | |
97 | ADDR straddr, adr, praddr; | |
98 | ADDR j; | |
99 | ||
100 | praddr = extaddr(proc); | |
101 | if (praddr == -1) { | |
102 | printf("Cannot find %s\n", proc); | |
103 | return; | |
104 | } | |
105 | straddr = extaddr("_dbargs"); | |
106 | if (straddr == -1) { | |
107 | error("Program not loaded with -lg"); | |
108 | return; | |
109 | } | |
110 | ||
111 | numchars = 0; | |
112 | subargp = subargs; | |
113 | argsp++; | |
114 | *subargp++ = praddr; | |
115 | subargp++; | |
116 | ||
117 | for (i=0; i<NUMARGS - 2; i++) { /* process an argument */ | |
118 | ch = *argsp; | |
119 | if (ch == '\'') { | |
120 | *subargp++ = *(argsp+1); | |
121 | argsp += 2; | |
122 | } else if (ch == '"') { | |
123 | *subargp++ = straddr + sizeof subargs + numchars; | |
124 | argsp++; | |
125 | for (;;) { | |
126 | ch = *argsp++; | |
127 | if (ch == '\\') { | |
128 | switch(ch = *argsp++) { | |
129 | case 'r': | |
130 | ch = '\015'; | |
131 | break; | |
132 | case 'n': | |
133 | ch = '\012'; | |
134 | break; | |
135 | case '\\': | |
136 | ch = '\\'; | |
137 | break; | |
138 | } | |
139 | } | |
140 | substr.c[numchars++] = ch; | |
141 | if (ch == '"') { | |
142 | substr.c[numchars-1] = '\0'; | |
143 | break; | |
144 | } | |
145 | if (ch == '\0') { | |
146 | error("Unterminated string constant"); | |
147 | return; | |
148 | } | |
149 | if (numchars > sizeof substr.c) { | |
150 | error("Too many string constants"); | |
151 | return; | |
152 | } | |
153 | } | |
154 | } else if ((ch >= '0' && ch <= '9') || ch == '-') { | |
155 | *subargp++ = readint(&argsp); | |
156 | } else if ((ch >= 'a' && ch <= 'z') || | |
157 | (ch >= 'A' && ch <= 'Z') || ch == '_') { | |
158 | cpname(var, argsp); | |
159 | j = varaddr(curproc()->pname, var); | |
160 | if (j == -1) { | |
161 | return; | |
162 | } | |
163 | *subargp++ = | |
164 | sl_class == N_RSYM ? | |
165 | *(ADDR *)(((ADDR) &u) + R0 + (WORDSIZE)*j) : | |
166 | getval(j, typetodesc(sl_type, 0)[0], DSP); | |
167 | do { | |
168 | argsp++; | |
169 | } while (varchar(*argsp) || number(*argsp)); | |
170 | } else if (ch != ')') { | |
171 | printf("Unexpected character %c\n", ch); | |
172 | return; | |
173 | } | |
174 | ||
175 | do { | |
176 | ch = *argsp++; | |
177 | } while(ch == ' '); | |
178 | if (ch == ')') { | |
179 | if (scallx == 0) { | |
180 | scallx = 1; | |
181 | pcs = *(ADDR *)(((ADDR)&u)+PC); | |
182 | fps = *(ADDR *)(((ADDR)&u)+FP); | |
183 | aps = *(ADDR *)(((ADDR)&u)+AP); | |
184 | if (bkpts = scanbkpt(userpc)) { | |
185 | if (flagss = bkpts->flag) { | |
186 | bkpts->flag = BKPTSET; | |
187 | } | |
188 | } | |
189 | } | |
190 | dot = *(ADDR *)(((ADDR)&u)+PC) = extaddr("_dbsubc"); | |
191 | if (dot == -1) { | |
192 | error("Internal error - cannot find _dbsubc"); | |
193 | return; | |
194 | } | |
195 | adrflg = 1; | |
196 | cntval = 1; | |
197 | if (pid == 0 || signo) subpcs('r'); | |
198 | subargs[1] = (subargp - subargs) - 2; | |
199 | adr = straddr; | |
200 | for (j=0; j<=(subargp-subargs); j++) { | |
201 | put(adr, DSP, subargs[j]); | |
202 | adr += WORDSIZE; | |
203 | } | |
204 | adr = straddr + sizeof subargs; | |
205 | for (j=0; j<(numchars+WORDSIZE-1)/WORDSIZE; j++) { | |
206 | put(adr, DSP, substr.w[j]); | |
207 | adr += WORDSIZE; | |
208 | } | |
209 | dschar = *argsp++; | |
210 | errflg = 0; | |
211 | dopcs('c'); | |
212 | if (!signo) printf("Breakpoint"); | |
213 | printf(" at\n"); | |
214 | return; | |
215 | } | |
216 | while (*argsp == ' ' || *argsp == ',') | |
217 | argsp++; | |
218 | } | |
219 | ||
220 | error ("Too many arguments"); | |
221 | ||
222 | } | |
223 | ||
224 | ||
225 | /* get arguments from core file, place them in args */ | |
226 | getargs() { | |
227 | struct proct *procp; | |
228 | ADDR p, av; | |
229 | int ac, i; | |
230 | char *argsp = args; | |
231 | union { | |
232 | char c[WORDSIZE]; | |
233 | int w; | |
234 | float f; | |
235 | } word; | |
236 | ||
237 | if ((procp = initframe()) == badproc) goto old1; | |
238 | do { | |
239 | if (eqstr("main", procp->pname)) | |
240 | goto fnd; | |
241 | } while ((procp = nextframe()) != badproc); | |
242 | ||
243 | old1: cpstr(args, oldargs); | |
244 | printf("%s %s\n", symfil, args); | |
245 | return; | |
246 | ||
247 | fnd: ac = get(argp, DSP); | |
248 | if ((ac == 0) || (ac & 0xff)) goto old1; | |
249 | ac = get(argp+4, DSP); | |
250 | av = (ADDR) get(argp+8, DSP); | |
251 | ||
252 | av += WORDSIZE; | |
253 | ac--; | |
254 | ||
255 | for (; ac; ac--) { | |
256 | p = (ADDR) get(av, DSP); | |
257 | av += WORDSIZE; | |
258 | for (;;) { | |
259 | word.w = get(p, DSP); | |
260 | for (i=0; i<WORDSIZE; i++) { | |
261 | if (word.c[i] == '\0') goto l1; | |
262 | *argsp++ = word.c[i]; | |
263 | } | |
264 | p += WORDSIZE; | |
265 | } | |
266 | l1: *argsp++ = ' '; | |
267 | } | |
268 | *argsp == '\0'; | |
269 | printf("%s %s\n", symfil, args); | |
270 | return; | |
271 | ||
272 | ||
273 | } | |
274 | ||
275 | dopcs(c) | |
276 | char c; { | |
277 | if (c != 'r' && c != 'R' && sdbttym.sg_flags != userttym.sg_flags) | |
278 | stty(2, &userttym); | |
279 | subpcs(c); | |
280 | gtty(2, &userttym); | |
281 | if (sdbttym.sg_flags != userttym.sg_flags) | |
282 | stty(2, &sdbttym); | |
283 | ||
284 | if (eqany(c, "cCsS") && | |
285 | *(ADDR *)(((ADDR)&u)+PC) == extaddr("_dbsubn")) { | |
286 | if (dschar == '/') { | |
287 | dispf((ADDR) 0, *argsp ? argsp : "d", N_RSYM, 0, 0, DSP); | |
288 | } | |
289 | else | |
290 | printf("Procedure returned normally\n"); | |
291 | userpc = dot = *(ADDR *)(((ADDR)&u)+PC) = pcs; | |
292 | *(ADDR *)(((ADDR)&u)+FP) = fps; | |
293 | *(ADDR *)(((ADDR)&u)+AP) = aps; | |
294 | if (bkpts) | |
295 | bkpts->flag = flagss; | |
296 | scallx = 0; | |
297 | longjmp(env, 0); | |
298 | } | |
299 | } | |
300 | ||
301 | /* execute commands from a breakpoint */ | |
302 | acommand(cmds) | |
303 | char *cmds; { | |
304 | char *p = cmds; | |
305 | int endflg = 0; | |
306 | ||
307 | setcur(0); | |
308 | do { /* process a command */ | |
309 | for (;;) { | |
310 | if (*p == ';') { | |
311 | *p = '\n'; | |
312 | break; | |
313 | } | |
314 | if (*p == '\n') { | |
315 | endflg++; | |
316 | break; | |
317 | } | |
318 | p++; | |
319 | } | |
320 | if (decode(cmds) == 1) { | |
321 | printf("Bad command: "); | |
322 | do { | |
323 | printf("%c", *cmds); | |
324 | } while (*cmds++ != '\n'); | |
325 | return; | |
326 | } | |
327 | docommand(); | |
b1c04ed3 BJ |
328 | if (!endflg) |
329 | *p = ';'; | |
e3075328 BJ |
330 | p = cmds = p + 1; |
331 | } while (!endflg); | |
332 | } |