Commit | Line | Data |
---|---|---|
d94e2462 M |
1 | # |
2 | /* | |
3 | * | |
4 | * UNIX debugger | |
5 | * | |
6 | */ | |
7 | ||
8 | #include "defs.h" | |
9 | ||
10 | ||
11 | MSG NOFORK; | |
12 | MSG ENDPCS; | |
13 | MSG BADWAIT; | |
14 | ||
15 | CHAR *lp; | |
16 | INT sigint; | |
17 | INT sigqit; | |
18 | ||
19 | /* breakpoints */ | |
20 | BKPTR bkpthead; | |
21 | ||
22 | REGLIST reglist[]; | |
23 | ||
24 | CHAR lastc; | |
25 | POS corhdr[]; | |
26 | POS *endhdr; | |
27 | ||
28 | INT fcor; | |
29 | INT fsym; | |
30 | STRING errflg; | |
31 | INT errno; | |
32 | INT signo; | |
33 | ||
34 | L_INT dot; | |
35 | STRING symfil; | |
36 | INT wtflag; | |
37 | INT pid; | |
38 | L_INT expv; | |
39 | INT adrflg; | |
40 | L_INT loopcnt; | |
41 | ||
42 | ||
43 | ||
44 | ||
45 | ||
46 | /* service routines for sub process control */ | |
47 | ||
48 | getsig(sig) | |
49 | { return(expr(0) ? shorten(expv) : sig); | |
50 | } | |
51 | ||
52 | INT userpc=1; | |
53 | ||
54 | runpcs(runmode, execsig) | |
55 | { | |
56 | INT rc; | |
57 | REG BKPTR bkpt; | |
58 | IF adrflg | |
59 | THEN userpc=shorten(dot); | |
60 | FI | |
61 | setbp(); | |
62 | printf("%s: running\n", symfil); | |
63 | ||
64 | WHILE (loopcnt--)>0 | |
65 | DO | |
66 | #ifdef DEBUG | |
67 | printf("\ncontinue %d %d\n",userpc,execsig); | |
68 | #endif | |
69 | stty(0,&usrtty); | |
70 | ptrace(runmode,pid,userpc,execsig); | |
71 | bpwait(); chkerr(); readregs(); | |
72 | ||
73 | /*look for bkpt*/ | |
74 | IF signo==0 ANDF (bkpt=scanbkpt(endhdr[pc]-2)) | |
75 | THEN /*stopped at bkpt*/ | |
76 | userpc=endhdr[pc]=bkpt->loc; | |
77 | IF bkpt->flag==BKPTEXEC | |
78 | ORF ((bkpt->flag=BKPTEXEC, command(bkpt->comm,':')) ANDF --bkpt->count) | |
79 | THEN execbkpt(bkpt); execsig=0; loopcnt++; | |
80 | userpc=1; | |
81 | ELSE bkpt->count=bkpt->initcnt; | |
82 | rc=1; | |
83 | FI | |
84 | ELSE rc=0; execsig=signo; userpc=1; | |
85 | FI | |
86 | OD | |
87 | return(rc); | |
88 | } | |
89 | ||
90 | endpcs() | |
91 | { | |
92 | REG BKPTR bkptr; | |
93 | IF pid | |
94 | THEN ptrace(EXIT,pid,0,0); pid=0; userpc=1; | |
95 | FOR bkptr=bkpthead; bkptr; bkptr=bkptr->nxtbkpt | |
96 | DO IF bkptr->flag | |
97 | THEN bkptr->flag=BKPTSET; | |
98 | FI | |
99 | OD | |
100 | FI | |
101 | } | |
102 | ||
103 | setup() | |
104 | { | |
105 | close(fsym); fsym = -1; | |
106 | IF (pid = fork()) == 0 | |
107 | THEN ptrace(SETTRC,0,0,0); | |
108 | signal(SIGINT,sigint); signal(SIGQUIT,sigqit); | |
109 | doexec(); exit(0); | |
110 | ELIF pid == -1 | |
111 | THEN error(NOFORK); | |
112 | ELSE bpwait(); readregs(); lp[0]=EOR; lp[1]=0; | |
113 | fsym=open(symfil,wtflag); | |
114 | IF errflg | |
115 | THEN printf("%s: cannot execute\n",symfil); | |
116 | endpcs(); error(0); | |
117 | FI | |
118 | FI | |
119 | } | |
120 | ||
121 | execbkpt(bkptr) | |
122 | BKPTR bkptr; | |
123 | { INT bkptloc; | |
124 | #ifdef DEBUG | |
125 | printf("exbkpt: %d\n",bkptr->count); | |
126 | #endif | |
127 | bkptloc = bkptr->loc; | |
128 | ptrace(WIUSER,pid,bkptloc,bkptr->ins); | |
129 | stty(0,&usrtty); | |
130 | ptrace(SINGLE,pid,bkptloc,0); | |
131 | bpwait(); chkerr(); | |
132 | ptrace(WIUSER,pid,bkptloc,BPT); | |
133 | bkptr->flag=BKPTSET; | |
134 | } | |
135 | ||
136 | ||
137 | doexec() | |
138 | { | |
139 | STRING argl[MAXARG]; | |
140 | CHAR args[LINSIZ]; | |
141 | STRING p, *ap, filnam; | |
142 | ap=argl; p=args; | |
143 | *ap++=symfil; | |
144 | REP IF rdc()==EOR THEN break; FI | |
145 | *ap = p; | |
146 | WHILE lastc!=EOR ANDF lastc!=SP ANDF lastc!=TB DO *p++=lastc; readchar(); OD | |
147 | *p++=0; filnam = *ap+1; | |
148 | IF **ap=='<' | |
149 | THEN close(0); | |
150 | IF open(filnam,0)<0 | |
151 | THEN printf("%s: cannot open\n",filnam); exit(0); | |
152 | FI | |
153 | ELIF **ap=='>' | |
154 | THEN close(1); | |
155 | IF creat(filnam,0666)<0 | |
156 | THEN printf("%s: cannot create\n",filnam); exit(0); | |
157 | FI | |
158 | ELSE ap++; | |
159 | FI | |
160 | PER lastc!=EOR DONE | |
161 | *ap++=0; | |
162 | execv(symfil, argl); | |
163 | } | |
164 | ||
165 | BKPTR scanbkpt(adr) | |
166 | { | |
167 | REG BKPTR bkptr; | |
168 | FOR bkptr=bkpthead; bkptr; bkptr=bkptr->nxtbkpt | |
169 | DO IF bkptr->flag ANDF bkptr->loc==adr | |
170 | THEN break; | |
171 | FI | |
172 | OD | |
173 | return(bkptr); | |
174 | } | |
175 | ||
176 | delbp() | |
177 | { | |
178 | REG INT a; | |
179 | REG BKPTR bkptr; | |
180 | FOR bkptr=bkpthead; bkptr; bkptr=bkptr->nxtbkpt | |
181 | DO IF bkptr->flag | |
182 | THEN a=bkptr->loc; | |
183 | ptrace(WIUSER,pid,a,bkptr->ins); | |
184 | FI | |
185 | OD | |
186 | } | |
187 | ||
188 | setbp() | |
189 | { | |
190 | REG INT a; | |
191 | REG BKPTR bkptr; | |
192 | ||
193 | FOR bkptr=bkpthead; bkptr; bkptr=bkptr->nxtbkpt | |
194 | DO IF bkptr->flag | |
195 | THEN a = bkptr->loc; | |
196 | bkptr->ins = ptrace(RIUSER, pid, a, 0); | |
197 | ptrace(WIUSER, pid, a, BPT); | |
198 | IF errno | |
199 | THEN prints("cannot set breakpoint: "); | |
200 | psymoff(leng(bkptr->loc),ISYM,"\n"); | |
201 | FI | |
202 | FI | |
203 | OD | |
204 | } | |
205 | ||
206 | bpwait() | |
207 | { | |
208 | REG INT w; | |
209 | INT stat; | |
210 | ||
211 | signal(SIGINT, 1); | |
212 | WHILE (w = wait(&stat))!=pid ANDF w != -1 DONE | |
213 | signal(SIGINT,sigint); | |
214 | gtty(0,&usrtty); | |
215 | stty(0,&adbtty); | |
216 | IF w == -1 | |
217 | THEN pid=0; | |
218 | errflg=BADWAIT; | |
219 | ELIF (stat & 0177) != 0177 | |
220 | THEN IF signo = stat&0177 | |
221 | THEN sigprint(); | |
222 | FI | |
223 | IF stat&0200 | |
224 | THEN prints(" - core dumped"); | |
225 | close(fcor); | |
226 | setcor(); | |
227 | FI | |
228 | pid=0; | |
229 | errflg=ENDPCS; | |
230 | ELSE signo = stat>>8; | |
231 | IF signo!=SIGTRC | |
232 | THEN sigprint(); | |
233 | ELSE signo=0; | |
234 | FI | |
235 | flushbuf(); | |
236 | FI | |
237 | } | |
238 | ||
239 | readregs() | |
240 | { | |
241 | /*get REG values from pcs*/ | |
242 | REG i; | |
243 | FOR i=0; i<9; i++ | |
244 | DO endhdr[reglist[i].roffs] = | |
245 | ptrace(RUREGS, pid, 2*(512+reglist[i].roffs), 0); | |
246 | OD | |
247 | ||
248 | /* REALing poINT */ | |
249 | FOR i=FROFF; i<FRLEN+FROFF; i++ | |
250 | DO corhdr[i] = ptrace(RUREGS,pid,i,0); OD | |
251 | } | |
252 | ||
253 |