| 1 | # |
| 2 | /* |
| 3 | * |
| 4 | * UNIX debugger |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include "head.h" |
| 9 | |
| 10 | |
| 11 | MSG BADMAG; |
| 12 | |
| 13 | INT wtflag; |
| 14 | INT fcor; |
| 15 | INT fsym; |
| 16 | L_INT maxfile; |
| 17 | L_INT maxstor; |
| 18 | L_INT txtsiz; |
| 19 | L_INT datsiz; |
| 20 | L_INT datbas; |
| 21 | L_INT stksiz; |
| 22 | STRING errflg; |
| 23 | INT magic; |
| 24 | L_INT symbas; |
| 25 | L_INT symnum; |
| 26 | L_INT entrypt; |
| 27 | |
| 28 | INT argcount; |
| 29 | INT signo; |
| 30 | struct user u; |
| 31 | |
| 32 | STRING symfil = "a.out"; |
| 33 | STRING corfil = "core"; |
| 34 | |
| 35 | #define TXTHDRSIZ (sizeof(txthdr)) |
| 36 | |
| 37 | #ifndef EDDT |
| 38 | readl(f,p,n) int f,n; long * p;{ |
| 39 | #ifndef vax |
| 40 | int t=0; |
| 41 | do {t += read(f,&(p->loword),2); t += read(f,&(p->hiword),2); p++;} while (--n); |
| 42 | return(t); |
| 43 | #else |
| 44 | return(read(f,p,n*sizeof(long))); |
| 45 | #endif |
| 46 | } |
| 47 | #endif |
| 48 | |
| 49 | setsym() |
| 50 | { |
| 51 | #ifndef EDDT |
| 52 | TXTHDR txthdr; |
| 53 | |
| 54 | fsym=getfile(symfil,1); |
| 55 | txtmap.ufd=fsym; |
| 56 | IF readl(fsym, txthdr, TXTHDRSIZ/sizeof(txthdr[0]))==TXTHDRSIZ |
| 57 | THEN magic=txthdr[0]; |
| 58 | IF magic!=0411 ANDF magic!=0410 ANDF magic!=0407 ANDF magic!=0405 |
| 59 | THEN magic=0; |
| 60 | ELSE symnum=txthdr[4]/SYMTABSIZ; |
| 61 | txtsiz=txthdr[1]; |
| 62 | datsiz=txthdr[2]; |
| 63 | symbas=txtsiz+datsiz; |
| 64 | txtmap.b1=0; |
| 65 | txtmap.e1=(magic==0407?symbas:txtsiz); |
| 66 | txtmap.f1 = TXTHDRSIZ; |
| 67 | txtmap.b2=datbas=(magic==0410?round(txtsiz,TXTRNDSIZ):0); |
| 68 | txtmap.e2=txtmap.b2+(magic==0407?symbas:datsiz); |
| 69 | txtmap.f2 = TXTHDRSIZ+(magic==0407?0:txtmap.e1); |
| 70 | entrypt=txthdr[5]; |
| 71 | symbas += txthdr[6]+txthdr[7]; |
| 72 | symbas += TXTHDRSIZ; |
| 73 | ststart = symbas; |
| 74 | |
| 75 | /* set up symvec */ |
| 76 | FI |
| 77 | FI |
| 78 | IF magic==0 THEN txtmap.e1=maxfile; FI |
| 79 | #endif |
| 80 | } |
| 81 | |
| 82 | setcor() |
| 83 | { |
| 84 | #ifndef EDDT |
| 85 | fcor=getfile(corfil,2); |
| 86 | datmap.ufd=fcor; |
| 87 | IF read(fcor, &u, ctob(4))==ctob(4) |
| 88 | ANDF (u.u_pcb.pcb_ksp & 0xF0000000L)==0x80000000L |
| 89 | ANDF (u.u_pcb.pcb_usp & 0xF0000000L)==0x70000000L |
| 90 | THEN |
| 91 | signo = u.u_arg[0]&017; |
| 92 | txtsiz = ctob(u.u_tsize); |
| 93 | datsiz = ctob(u.u_dsize); |
| 94 | stksiz = ctob(u.u_ssize); |
| 95 | datmap.b1 = datbas = (magic==0410?round(txtsiz,TXTRNDSIZ):0); |
| 96 | datmap.e1=(magic==0407?txtsiz:datmap.b1)+datsiz; |
| 97 | datmap.f1 = ctob(USIZE); |
| 98 | datmap.b2 = maxstor-stksiz; |
| 99 | datmap.e2 = maxstor; |
| 100 | datmap.f2 = ctob(USIZE)+(magic==0410?datsiz:datmap.e1); |
| 101 | signo = *(ADDR *)(((ADDR)&u)+ctob(4)-4*4); |
| 102 | IF magic ANDF magic!=u.u_exdata.ux_mag |
| 103 | THEN printf("%s\n",BADMAG); |
| 104 | FI |
| 105 | ELSE datmap.e1 = maxfile; |
| 106 | FI |
| 107 | #endif |
| 108 | } |
| 109 | |
| 110 | #ifndef EDDT |
| 111 | create(f) |
| 112 | STRING f; |
| 113 | { int fd; |
| 114 | IF (fd=creat(f,0644))>=0 |
| 115 | THEN close(fd); return(open(f,wtflag)); |
| 116 | ELSE return(-1); |
| 117 | FI |
| 118 | } |
| 119 | |
| 120 | getfile(filnam,cnt) |
| 121 | STRING filnam; |
| 122 | { |
| 123 | REG INT fsym; |
| 124 | |
| 125 | IF !eqstr("-",filnam) |
| 126 | THEN fsym=open(filnam,wtflag); |
| 127 | IF fsym<0 ANDF argcount>cnt |
| 128 | THEN IF wtflag |
| 129 | THEN fsym=create(filnam); |
| 130 | FI |
| 131 | IF fsym<0 |
| 132 | THEN printf("cannot open `%s'\n", filnam); |
| 133 | FI |
| 134 | FI |
| 135 | ELSE fsym = -1; |
| 136 | FI |
| 137 | return(fsym); |
| 138 | } |
| 139 | #endif |