| 1 | # |
| 2 | /* |
| 3 | * |
| 4 | * UNIX debugger |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include "defs.h" |
| 9 | |
| 10 | |
| 11 | MSG NOCFN; |
| 12 | |
| 13 | INT callpc; |
| 14 | BOOL localok; |
| 15 | SYMTAB symbol; |
| 16 | |
| 17 | STRING errflg; |
| 18 | |
| 19 | |
| 20 | findroutine(cframe) |
| 21 | L_INT cframe; |
| 22 | { |
| 23 | REG INT narg, inst; |
| 24 | INT lastpc, back2; |
| 25 | BOOL v; |
| 26 | |
| 27 | v=FALSE; localok=FALSE; lastpc=callpc; |
| 28 | callpc=get(cframe+2, DSP); back2=get(leng(callpc-2), ISP); |
| 29 | IF (inst=get(leng(callpc-4), ISP)) == 04737 /* jsr pc,*$... */ |
| 30 | THEN narg = 1; |
| 31 | ELIF (inst&~077)==04700 /* jsr pc,... */ |
| 32 | THEN narg=0; v=(inst!=04767); |
| 33 | ELIF (back2&~077)==04700 |
| 34 | THEN narg=0; v=TRUE; |
| 35 | ELSE errflg=NOCFN; |
| 36 | return(0); |
| 37 | FI |
| 38 | IF findsym( (v ? lastpc : ((inst==04767?callpc:0) + back2) ),ISYM) == -1 |
| 39 | ANDF !v |
| 40 | THEN symbol.symc[0] = '?'; |
| 41 | symbol.symc[1] = 0; |
| 42 | symbol.symv = 0; |
| 43 | ELSE localok=TRUE; |
| 44 | FI |
| 45 | inst = get(leng(callpc), ISP); |
| 46 | IF inst == 05726 /* tst (sp)+ */ |
| 47 | THEN return(narg+1); |
| 48 | FI |
| 49 | IF inst == 022626 /* cmp (sp)+,(sp)+ */ |
| 50 | THEN return(narg+2); |
| 51 | FI |
| 52 | IF inst == 062706 /* add $n,sp */ |
| 53 | THEN return(narg+get(leng(callpc+2), ISP)/2); |
| 54 | FI |
| 55 | return(narg); |
| 56 | } |
| 57 | |