2 84114f06 2004-04-19 devnull * db - main command loop and error/interrupt handling
4 84114f06 2004-04-19 devnull #include "defs.h"
5 84114f06 2004-04-19 devnull #include "fns.h"
7 84114f06 2004-04-19 devnull int wtflag = OREAD;
8 84114f06 2004-04-19 devnull BOOL kflag;
10 84114f06 2004-04-19 devnull BOOL mkfault;
11 84114f06 2004-04-19 devnull ADDR maxoff;
13 84114f06 2004-04-19 devnull int xargc; /* bullshit */
15 84114f06 2004-04-19 devnull extern BOOL executing;
16 84114f06 2004-04-19 devnull extern int infile;
17 84114f06 2004-04-19 devnull int exitflg;
18 84114f06 2004-04-19 devnull extern int eof;
20 84114f06 2004-04-19 devnull int alldigs(char*);
21 84114f06 2004-04-19 devnull void fault(void*, char*);
23 84114f06 2004-04-19 devnull extern char *Ipath;
24 84114f06 2004-04-19 devnull jmp_buf env;
25 84114f06 2004-04-19 devnull static char *errmsg;
27 84114f06 2004-04-19 devnull Fhdr *symhdr, *corhdr;
30 84114f06 2004-04-19 devnull usage(void)
32 84114f06 2004-04-19 devnull fprint(2, "usage: db [-kw] [-m machine] [-I dir] [symfile] [pid]\n");
33 84114f06 2004-04-19 devnull exits("usage");
37 84114f06 2004-04-19 devnull main(int argc, char **argv)
39 84114f06 2004-04-19 devnull int i, omode;
41 84114f06 2004-04-19 devnull char *name;
42 84114f06 2004-04-19 devnull Fhdr *hdr;
44 84114f06 2004-04-19 devnull name = 0;
45 84114f06 2004-04-19 devnull outputinit();
46 84114f06 2004-04-19 devnull maxoff = MAXOFF;
47 84114f06 2004-04-19 devnull omode = OREAD;
48 84114f06 2004-04-19 devnull ARGBEGIN{
51 84114f06 2004-04-19 devnull case 'A':
53 84114f06 2004-04-19 devnull case 'k':
54 84114f06 2004-04-19 devnull kflag = 1;
56 84114f06 2004-04-19 devnull case 'w':
57 84114f06 2004-04-19 devnull omode = ORDWR;
59 84114f06 2004-04-19 devnull case 'I':
60 84114f06 2004-04-19 devnull s = ARGF();
61 84114f06 2004-04-19 devnull if(s == 0)
62 84114f06 2004-04-19 devnull dprint("missing -I argument\n");
64 84114f06 2004-04-19 devnull Ipath = s;
66 84114f06 2004-04-19 devnull case 'm':
67 84114f06 2004-04-19 devnull name = ARGF();
68 84114f06 2004-04-19 devnull if(name == 0)
69 84114f06 2004-04-19 devnull dprint("missing -m argument\n");
74 84114f06 2004-04-19 devnull * Unix and Plan 9 differ on what the right order of pid, text, and core is.
75 84114f06 2004-04-19 devnull * I never remember anyway. Let's just accept them in any order.
77 84114f06 2004-04-19 devnull for(i=0; i<argc; i++){
78 84114f06 2004-04-19 devnull if(alldigs(argv[i])){
80 84114f06 2004-04-19 devnull dprint("already have pid %d; ignoring pid %d\n", pid, argv[i]);
81 84114f06 2004-04-19 devnull continue;
83 84114f06 2004-04-19 devnull if(corhdr){
84 84114f06 2004-04-19 devnull dprint("already have core %s; ignoring pid %d\n", corfil, pid);
85 84114f06 2004-04-19 devnull continue;
87 84114f06 2004-04-19 devnull pid = atoi(argv[i]);
88 84114f06 2004-04-19 devnull continue;
90 84114f06 2004-04-19 devnull if((hdr = crackhdr(argv[i], omode)) == nil){
91 84114f06 2004-04-19 devnull dprint("crackhdr %s: %r\n", argv[i]);
92 84114f06 2004-04-19 devnull continue;
94 84114f06 2004-04-19 devnull dprint("%s: %s %s %s\n", argv[i], hdr->aname, hdr->mname, hdr->fname);
95 84114f06 2004-04-19 devnull if(hdr->ftype == FCORE){
97 84114f06 2004-04-19 devnull dprint("already have pid %d; ignoring core %s\n", pid, argv[i]);
98 84114f06 2004-04-19 devnull uncrackhdr(hdr);
99 84114f06 2004-04-19 devnull continue;
101 84114f06 2004-04-19 devnull if(corhdr){
102 84114f06 2004-04-19 devnull dprint("already have core %s; ignoring core %s\n", corfil, argv[i]);
103 84114f06 2004-04-19 devnull uncrackhdr(hdr);
104 84114f06 2004-04-19 devnull continue;
106 84114f06 2004-04-19 devnull corhdr = hdr;
107 84114f06 2004-04-19 devnull corfil = argv[i];
109 84114f06 2004-04-19 devnull if(symhdr){
110 84114f06 2004-04-19 devnull dprint("already have text %s; ignoring text %s\n", symfil, argv[i]);
111 84114f06 2004-04-19 devnull uncrackhdr(hdr);
112 84114f06 2004-04-19 devnull continue;
114 84114f06 2004-04-19 devnull symhdr = hdr;
115 84114f06 2004-04-19 devnull symfil = argv[i];
119 84114f06 2004-04-19 devnull if(symhdr==nil){
120 84114f06 2004-04-19 devnull symfil = "a.out";
121 84114f06 2004-04-19 devnull if(pid){
122 84114f06 2004-04-19 devnull if((s = proctextfile(pid)) != nil){
123 84114f06 2004-04-19 devnull dprint("pid %d: text %s\n", pid, s);
124 84114f06 2004-04-19 devnull symfil = s;
127 84114f06 2004-04-19 devnull /* XXX pull command from core */
129 84114f06 2004-04-19 devnull if((symhdr = crackhdr(symfil, omode)) == nil){
130 84114f06 2004-04-19 devnull dprint("crackhdr %s: %r\n", symfil);
131 84114f06 2004-04-19 devnull symfil = nil;
135 84114f06 2004-04-19 devnull if(!mach)
136 84114f06 2004-04-19 devnull mach = machcpu;
139 84114f06 2004-04-19 devnull * Set up maps.
141 84114f06 2004-04-19 devnull symmap = allocmap();
142 84114f06 2004-04-19 devnull cormap = allocmap();
143 84114f06 2004-04-19 devnull if(symmap == nil || cormap == nil)
144 84114f06 2004-04-19 devnull sysfatal("allocating maps: %r");
146 84114f06 2004-04-19 devnull if(symhdr){
147 84114f06 2004-04-19 devnull if(mapfile(symhdr, 0, symmap, nil) < 0)
148 84114f06 2004-04-19 devnull dprint("mapping %s: %r\n", symfil);
149 84114f06 2004-04-19 devnull mapfile(symhdr, 0, cormap, nil);
152 84114f06 2004-04-19 devnull dotmap = dumbmap(-1);
155 84114f06 2004-04-19 devnull * show initial state and drop into the execution loop.
157 84114f06 2004-04-19 devnull notify(fault);
158 84114f06 2004-04-19 devnull setsym();
159 84114f06 2004-04-19 devnull if(setjmp(env) == 0){
160 84114f06 2004-04-19 devnull if (pid || corhdr)
161 84114f06 2004-04-19 devnull setcor(); /* could get error */
162 84114f06 2004-04-19 devnull if (correg) {
163 84114f06 2004-04-19 devnull dprint("%s\n", mach->exc(cormap, correg));
164 84114f06 2004-04-19 devnull printpc();
168 84114f06 2004-04-19 devnull setjmp(env);
169 84114f06 2004-04-19 devnull if (executing)
170 84114f06 2004-04-19 devnull delbp();
171 84114f06 2004-04-19 devnull executing = FALSE;
172 84114f06 2004-04-19 devnull for (;;) {
173 84114f06 2004-04-19 devnull flushbuf();
174 84114f06 2004-04-19 devnull if (errmsg) {
175 84114f06 2004-04-19 devnull dprint(errmsg);
176 84114f06 2004-04-19 devnull printc('\n');
177 84114f06 2004-04-19 devnull errmsg = 0;
178 84114f06 2004-04-19 devnull exitflg = 0;
180 84114f06 2004-04-19 devnull if (mkfault) {
181 84114f06 2004-04-19 devnull mkfault=0;
182 84114f06 2004-04-19 devnull printc('\n');
183 84114f06 2004-04-19 devnull prints(DBNAME);
185 84114f06 2004-04-19 devnull clrinp();
187 84114f06 2004-04-19 devnull reread();
188 84114f06 2004-04-19 devnull if (eof) {
189 84114f06 2004-04-19 devnull if (infile == STDIN)
191 84114f06 2004-04-19 devnull iclose(-1, 0);
192 84114f06 2004-04-19 devnull eof = 0;
193 84114f06 2004-04-19 devnull longjmp(env, 1);
195 84114f06 2004-04-19 devnull exitflg = 0;
196 84114f06 2004-04-19 devnull command(0, 0);
197 84114f06 2004-04-19 devnull reread();
198 84114f06 2004-04-19 devnull if (rdc() != '\n')
199 84114f06 2004-04-19 devnull error("newline expected");
204 84114f06 2004-04-19 devnull alldigs(char *s)
206 84114f06 2004-04-19 devnull while(*s){
207 84114f06 2004-04-19 devnull if(*s<'0' || '9'<*s)
208 84114f06 2004-04-19 devnull return 0;
211 84114f06 2004-04-19 devnull return 1;
215 84114f06 2004-04-19 devnull done(void)
217 84114f06 2004-04-19 devnull if (pid)
218 84114f06 2004-04-19 devnull endpcs();
219 84114f06 2004-04-19 devnull exits(exitflg? "error": 0);
223 84114f06 2004-04-19 devnull * An error occurred; save the message for later printing,
224 84114f06 2004-04-19 devnull * close open files, and reset to main command loop.
227 84114f06 2004-04-19 devnull error(char *n)
229 84114f06 2004-04-19 devnull errmsg = n;
230 84114f06 2004-04-19 devnull iclose(0, 1);
231 84114f06 2004-04-19 devnull oclose();
232 84114f06 2004-04-19 devnull flush();
233 84114f06 2004-04-19 devnull delbp();
234 84114f06 2004-04-19 devnull ending = 0;
235 84114f06 2004-04-19 devnull longjmp(env, 1);
239 84114f06 2004-04-19 devnull errors(char *m, char *n)
241 84114f06 2004-04-19 devnull static char buf[128];
243 84114f06 2004-04-19 devnull sprint(buf, "%s: %s", m, n);
244 84114f06 2004-04-19 devnull error(buf);
248 84114f06 2004-04-19 devnull * An interrupt occurred;
249 84114f06 2004-04-19 devnull * seek to the end of the current file
250 84114f06 2004-04-19 devnull * and remember that there was a fault.
253 84114f06 2004-04-19 devnull fault(void *a, char *s)
255 84114f06 2004-04-19 devnull USED(a);
256 84114f06 2004-04-19 devnull if(strncmp(s, "interrupt", 9) == 0){
257 84114f06 2004-04-19 devnull seek(infile, 0L, 2);
258 84114f06 2004-04-19 devnull mkfault++;
259 84114f06 2004-04-19 devnull noted(NCONT);
261 84114f06 2004-04-19 devnull noted(NDFLT);
