projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| d94e2462 M |
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 |