414 lines
6.4 KiB
C
414 lines
6.4 KiB
C
/*
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*
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* debugger
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*
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*/
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#include "defs.h"
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#include "fns.h"
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#define ptrace dbptrace
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extern int infile;
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extern int outfile;
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extern int maxpos;
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/* general printing routines ($) */
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char *Ipath = INCDIR;
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static int tracetype;
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static void printfp(Map*, int);
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/*
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* callback on stack trace
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*/
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static int
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ptrace(Map *map, Regs *regs, u64int pc, u64int nextpc, Symbol *sym, int depth)
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{
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char buf[512];
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USED(map);
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if(sym){
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dprint("%s(", sym->name);
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printparams(sym, regs);
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dprint(") ");
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}else
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dprint("%#lux ", pc);
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printsource(pc);
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dprint(" called from ");
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symoff(buf, 512, nextpc, CTEXT);
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dprint("%s ", buf);
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/* printsource(nextpc); */
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dprint("\n");
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if(tracetype == 'C' && sym)
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printlocals(sym, regs);
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return depth<40;
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}
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static ulong *adrregvals;
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static int
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adrrw(Regs *regs, char *name, u64int *val, int isr)
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{
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int i;
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if((i = windindex(name)) == -1)
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return correg->rw(correg, name, val, isr);
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if(isr){
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*val = adrregvals[i];
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return 0;
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}
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werrstr("saved registers are immutable");
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return -1;
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}
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Regs*
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adrregs(void)
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{
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int i;
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static Regs r;
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static u32int x;
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if(adrregvals== nil){
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adrregvals = malloc(mach->nwindreg*sizeof(adrregvals[0]));
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if(adrregvals == nil)
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error("%r");
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}
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for(i=0; i<mach->nwindreg; i++){
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if(get4(cormap, adrval+4*i, &x) < 0)
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error("%r");
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adrregvals[i] = x;
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}
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r.rw = adrrw;
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return &r;
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}
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void
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printdollar(int modif)
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{
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int i;
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u32int u4;
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BKPT *bk;
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Symbol s;
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int stack;
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char *fname;
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char buf[512];
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Regs *r;
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if (cntflg==0)
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cntval = -1;
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switch (modif) {
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case '<':
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if (cntval == 0) {
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while (readchar() != EOR)
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;
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reread();
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break;
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}
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if (rdc() == '<')
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stack = 1;
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else {
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stack = 0;
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reread();
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}
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fname = getfname();
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redirin(stack, fname);
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break;
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case '>':
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fname = getfname();
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redirout(fname);
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break;
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case 'a':
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attachprocess();
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break;
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/* maybe use this for lwpids?
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case 'A':
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attachpthread();
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break;
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*/
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case 'k':
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kmsys();
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break;
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case 'q':
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case 'Q':
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done();
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case 'w':
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maxpos=(adrflg?adrval:MAXPOS);
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break;
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case 'S':
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printsym();
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break;
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case 's':
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maxoff=(adrflg?adrval:MAXOFF);
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break;
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case 'm':
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printmap("? map", symmap);
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printmap("/ map", cormap);
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break;
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case 0:
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case '?':
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if (pid)
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dprint("pid = %d\n",pid);
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else
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prints("no process\n");
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flushbuf();
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case 'r':
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case 'R':
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printregs(modif);
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return;
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case 'f':
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case 'F':
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printfp(cormap, modif);
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return;
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case 'c':
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case 'C':
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tracetype = modif;
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if (adrflg)
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r = adrregs();
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else
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r = correg;
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if(stacktrace(cormap, correg, ptrace) <= 0)
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error("no stack frame");
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break;
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/*print externals*/
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case 'e':
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for (i = 0; indexsym(i, &s)>=0; i++) {
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if (s.class==CDATA)
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if (s.loc.type==LADDR)
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if (get4(cormap, s.loc.addr, &u4) > 0)
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dprint("%s/%12t%#lux\n", s.name, (ulong)u4);
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}
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break;
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/*print breakpoints*/
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case 'b':
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case 'B':
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for (bk=bkpthead; bk; bk=bk->nxtbkpt)
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if (bk->flag) {
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symoff(buf, 512, (WORD)bk->loc, CTEXT);
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dprint(buf);
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if (bk->count != 1)
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dprint(",%d", bk->count);
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dprint(":%c %s", bk->flag == BKPTTMP ? 'B' : 'b', bk->comm);
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}
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break;
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case 'M':
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fname = getfname();
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if (machbyname(fname) == 0)
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dprint("unknown name\n");;
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break;
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default:
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error("bad `$' command");
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}
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USED(r);
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}
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char *
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getfname(void)
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{
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static char fname[ARB];
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char *p;
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if (rdc() == EOR) {
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reread();
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return (0);
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}
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p = fname;
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do {
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*p++ = lastc;
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if (p >= &fname[ARB-1])
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error("filename too long");
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} while (rdc() != EOR);
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*p = 0;
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reread();
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return (fname);
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}
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static void
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printfp(Map *map, int modif)
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{
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Regdesc *rp;
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int i;
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int ret;
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char buf[512];
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for (i = 0, rp = mach->reglist; rp->name; rp += ret) {
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ret = 1;
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if (!(rp->flags&RFLT))
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continue;
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ret = fpformat(map, rp, buf, sizeof(buf), modif);
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if (ret < 0) {
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werrstr("Register %s: %r", rp->name);
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error("%r");
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}
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/* double column print */
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if (i&0x01)
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dprint("%40t%-8s%-12s\n", rp->name, buf);
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else
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dprint("\t%-8s%-12s", rp->name, buf);
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i++;
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}
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}
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void
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redirin(int stack, char *file)
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{
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char pfile[ARB];
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if (file == 0) {
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iclose(-1, 0);
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return;
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}
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iclose(stack, 0);
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if ((infile = open(file, 0)) < 0) {
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strcpy(pfile, Ipath);
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strcat(pfile, "/");
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strcat(pfile, file);
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if ((infile = open(pfile, 0)) < 0) {
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infile = STDIN;
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error("cannot open");
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}
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}
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}
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void
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printmap(char *s, Map *map)
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{
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int i;
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if (!map)
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return;
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if (map == symmap)
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dprint("%s%12t`%s'\n", s, symfil==nil ? "-" : symfil);
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else if (map == cormap)
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dprint("%s%12t`%s'\n", s, corfil==nil ? "-" : corfil);
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else
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dprint("%s\n", s);
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for (i = 0; i < map->nseg; i++) {
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dprint("%s%8t%-16#lux %-16#lux %-16#lux %s\n", map->seg[i].name,
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map->seg[i].base, map->seg[i].base+map->seg[i].size, map->seg[i].offset,
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map->seg[i].file ? map->seg[i].file : "");
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}
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}
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/*
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* dump the raw symbol table
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*/
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void
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printsym(void)
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{
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int i;
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Symbol *sp, s;
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for (i=0; indexsym(i, &s)>=0; i++){
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sp = &s;
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switch(sp->type) {
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case 't':
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case 'l':
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dprint("%8#lux t %s\n", sp->loc.addr, sp->name);
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break;
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case 'T':
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case 'L':
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dprint("%8#lux T %s\n", sp->loc.addr, sp->name);
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break;
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case 'D':
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case 'd':
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case 'B':
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case 'b':
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case 'a':
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case 'p':
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case 'm':
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dprint("%8#lux %c %s\n", sp->loc.addr, sp->type, sp->name);
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break;
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default:
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break;
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}
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}
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}
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#define STRINGSZ 128
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/*
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* print the value of dot as file:line
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*/
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void
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printsource(long dot)
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{
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char str[STRINGSZ];
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if (fileline(dot, str, STRINGSZ) >= 0)
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dprint("%s", str);
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}
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void
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printpc(void)
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{
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char buf[512];
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u64int u;
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if(rget(correg, mach->pc, &u) < 0)
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error("%r");
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dot = u;
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if(dot){
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printsource((long)dot);
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printc(' ');
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symoff(buf, sizeof(buf), (long)dot, CTEXT);
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dprint("%s/", buf);
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if (mach->das(cormap, dot, 'i', buf, sizeof(buf)) < 0)
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error("%r");
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dprint("%16t%s\n", buf);
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}
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}
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void
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printlocals(Symbol *fn, Regs *regs)
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{
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int i;
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u32int v;
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Symbol s;
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for (i = 0; indexlsym(fn, i, &s)>=0; i++) {
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if (s.class != CAUTO)
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continue;
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if(lget4(cormap, regs, s.loc, &v) >= 0)
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dprint("%8t%s.%s/%10t%#lux\n", fn->name, s.name, v);
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else
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dprint("%8t%s.%s/%10t?\n", fn->name, s.name);
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}
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}
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void
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printparams(Symbol *fn, Regs *regs)
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{
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int i;
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Symbol s;
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u32int v;
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int first = 0;
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for (i = 0; indexlsym(fn, i, &s)>=0; i++) {
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if (s.class != CPARAM)
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continue;
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if (first++)
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dprint(", ");
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if(lget4(cormap, regs, s.loc, &v) >= 0)
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dprint("%s=%#lux", s.name, v);
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else
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dprint("%s=?", s.name);
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}
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}
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