1 #include "u.h"
2 #include "../port/lib.h"
3 #include "mem.h"
4 #include "dat.h"
5 #include "fns.h"
6 #include "io.h"
7 #include "ureg.h"
8
9 #define DBG if(0)scrprint
10 #pragma varargck argpos scrprint 1
11 static Ureg ureg;
12
13 static void
scrprint(char * fmt,...)14 scrprint(char *fmt, ...)
15 {
16 char buf[128];
17 va_list va;
18 int n;
19
20 va_start(va, fmt);
21 n = vseprint(buf, buf+sizeof buf, fmt, va)-buf;
22 va_end(va);
23 putstrn(buf, n);
24 }
25
26 static char*
getline(void)27 getline(void)
28 {
29 static char buf[128];
30 int i, c;
31
32 for(;;){
33 for(i=0; i<nelem(buf) && (c=uartgetc()) != '\n'; i++){
34 DBG("%c...", c);
35 buf[i] = c;
36 }
37
38 if(i < nelem(buf)){
39 buf[i] = 0;
40 return buf;
41 }
42 }
43 }
44
45 static void*
addr(char * s,Ureg * ureg,char ** p)46 addr(char *s, Ureg *ureg, char **p)
47 {
48 ulong a;
49
50 a = strtoul(s, p, 16);
51 if(a < sizeof(Ureg))
52 return ((uchar*)ureg)+a;
53 return (void*)a;
54 }
55
56 static void
talkrdb(Ureg * ureg)57 talkrdb(Ureg *ureg)
58 {
59 uchar *a;
60 char *p, *req;
61
62 serialoq = nil; /* turn off serial console */
63 kprintoq = nil; /* turn off /dev/kprint if active */
64 // scrprint("Plan 9 debugger\n");
65 iprint("Edebugger reset\n");
66 for(;;){
67 req = getline();
68 switch(*req){
69 case 'r':
70 a = addr(req+1, ureg, nil);
71 DBG("read %p\n", a);
72 iprint("R%.8lux %.2ux %.2ux %.2ux %.2ux\n",
73 strtoul(req+1, 0, 16), a[0], a[1], a[2], a[3]);
74 break;
75
76 case 'w':
77 a = addr(req+1, ureg, &p);
78 *(ulong*)a = strtoul(p, nil, 16);
79 iprint("W\n");
80 break;
81 /*
82 * case Tmput:
83 n = min[4];
84 if(n > 4){
85 mesg(Rerr, Ecount);
86 break;
87 }
88 a = addr(min+0);
89 scrprint("mput %.8lux\n", a);
90 memmove(a, min+5, n);
91 mesg(Rmput, mout);
92 break;
93 *
94 */
95 default:
96 DBG("unknown %c\n", *req);
97 iprint("Eunknown message\n");
98 break;
99 }
100 }
101 }
102
103 void
rdb(void)104 rdb(void)
105 {
106 splhi();
107 iprint("rdb...");
108 callwithureg(talkrdb);
109 }
110