110 lines
1.7 KiB
C
110 lines
1.7 KiB
C
#include "u.h"
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#include "../port/lib.h"
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#include "mem.h"
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#include "dat.h"
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#include "fns.h"
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#include "io.h"
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#include "ureg.h"
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#define DBG if(0)scrprint
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#pragma varargck argpos scrprint 1
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static Ureg ureg;
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static void
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scrprint(char *fmt, ...)
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{
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char buf[128];
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va_list va;
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int n;
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va_start(va, fmt);
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n = vseprint(buf, buf+sizeof buf, fmt, va)-buf;
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va_end(va);
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putstrn(buf, n);
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}
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static char*
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getline(void)
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{
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static char buf[128];
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int i, c;
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for(;;){
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for(i=0; i<nelem(buf) && (c=uartgetc()) != '\n'; i++){
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DBG("%c...", c);
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buf[i] = c;
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}
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if(i < nelem(buf)){
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buf[i] = 0;
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return buf;
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}
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}
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}
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static void*
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addr(char *s, Ureg *ureg, char **p)
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{
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ulong a;
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a = strtoul(s, p, 16);
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if(a < sizeof(Ureg))
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return ((uchar*)ureg)+a;
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return (void*)a;
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}
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static void
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talkrdb(Ureg *ureg)
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{
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uchar *a;
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char *p, *req;
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serialoq = nil; /* turn off serial console */
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kprintoq = nil; /* turn off /dev/kprint if active */
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// scrprint("Plan 9 debugger\n");
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iprint("Edebugger reset\n");
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for(;;){
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req = getline();
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switch(*req){
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case 'r':
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a = addr(req+1, ureg, nil);
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DBG("read %p\n", a);
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iprint("R%.8lux %.2ux %.2ux %.2ux %.2ux\n",
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strtoul(req+1, 0, 16), a[0], a[1], a[2], a[3]);
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break;
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case 'w':
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a = addr(req+1, ureg, &p);
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*(ulong*)a = strtoul(p, nil, 16);
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iprint("W\n");
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break;
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/*
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* case Tmput:
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n = min[4];
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if(n > 4){
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mesg(Rerr, Ecount);
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break;
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}
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a = addr(min+0);
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scrprint("mput %.8lux\n", a);
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memmove(a, min+5, n);
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mesg(Rmput, mout);
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break;
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*
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*/
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default:
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DBG("unknown %c\n", *req);
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iprint("Eunknown message\n");
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break;
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}
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}
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}
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void
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rdb(void)
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{
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splhi();
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iprint("rdb...");
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callwithureg(talkrdb);
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}
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