2.11BSD#431 - /usr/src/bin/adb/findfn.c

   1: #include "defs.h"
   2: 
   3:     MSG NOCFN;
   4:     int callpc;
   5:     char    localok;
   6: extern  struct  SYMbol  *symbol;
   7:     char    *errflg;
   8:     char    curov;
   9:     int overlay;
  10:     long    var[36];
  11: 
  12: findroutine(cframe)
  13:     long    cframe;
  14: {
  15:     register int    narg, inst;
  16:     int lastpc, back2;
  17:     char    v;
  18:     char    savov, curovl;
  19: 
  20:     v=FALSE; localok=FALSE; lastpc=callpc;
  21:     if(overlay) {
  22:         /*
  23: 		 *  Save the previous overlay. Don't restore it,
  24: 		 *  so that the next call will have the correct previous
  25: 		 *  overlay.  The caller must save and restor the original
  26: 		 *  overlay if needed.
  27: 		 */
  28:         savov = curov;
  29:         curovl=get(cframe-2, DSP);
  30:         setovmap(curovl);
  31:     }
  32:     callpc=get(cframe+2, DSP); back2=get(leng(callpc-2), ISP);
  33:     IF (inst=get(leng(callpc-4), ISP)) == 04737 /* jsr pc,*$... */
  34:     THEN    narg = 1;
  35:     ELIF (inst&~077)==04700         /* jsr pc,... */
  36:     THEN    narg=0; v=(inst!=04767);
  37:     ELIF (back2&~077)==04700
  38:     THEN    narg=0; v=TRUE;
  39:     ELSE    errflg=NOCFN;
  40:         return(0);
  41:     FI
  42:     if (overlay)
  43:         setovmap(savov);    /* previous overlay, for findsym */
  44:     if (findsym((v ? lastpc : ((inst==04767?callpc:0) + back2)),ISYM) == -1
  45:         && !v)
  46:         symbol = NULL;
  47:     else
  48:         localok=TRUE;
  49:     if (overlay)
  50:         setovmap(curovl);
  51:     inst = get(leng(callpc), ISP);
  52:     IF inst == 062706       /* add $n,sp */
  53:     THEN
  54:         narg += get(leng(callpc+2), ISP)/2;
  55:         return(narg);
  56:     FI
  57:     if (inst == 05726 || inst == 010026)    /* tst (sp)+ or mov r0,(sp)+ */
  58:         return(narg+1);
  59:     IF inst == 022626       /* cmp (sp)+,(sp)+ */
  60:     THEN
  61:         return(narg+2);
  62:     FI
  63:     return(narg);
  64: }

Defined functions

Defined variables