projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| f0b63b36 BJ |
1 | static char sccsid[] = "@(#)main.c 4.1 %G%"; |
| 2 | # | |
| 3 | /* | |
| 4 | * | |
| 5 | * UNIX debugger | |
| 6 | * | |
| 7 | */ | |
| 8 | ||
| 9 | #include "head.h" | |
| 10 | #include <signal.h> | |
| 11 | #include <stdio.h> | |
| 12 | #include <sys/stat.h> | |
| 13 | ||
| 14 | INT mkfault; | |
| 15 | INT executing; | |
| 16 | CHAR *lp; | |
| 17 | L_INT maxoff; | |
| 18 | L_INT maxpos; | |
| 19 | ADDR sigint; | |
| 20 | ADDR sigqit; | |
| 21 | INT wtflag; | |
| 22 | L_INT maxfile; | |
| 23 | L_INT maxstor; | |
| 24 | L_INT txtsiz; | |
| 25 | L_INT datsiz; | |
| 26 | L_INT datbas; | |
| 27 | L_INT stksiz; | |
| 28 | STRING errflg; | |
| 29 | INT magic; | |
| 30 | L_INT entrypt; | |
| 31 | ||
| 32 | CHAR lastc; | |
| 33 | ||
| 34 | STRING symfil; | |
| 35 | STRING corfil; | |
| 36 | INT argcount; | |
| 37 | ADDR userpc; | |
| 38 | int fpe(); | |
| 39 | ||
| 40 | main(argc, argv) | |
| 41 | REG STRING *argv; | |
| 42 | REG INT argc; | |
| 43 | { | |
| 44 | register char *p; | |
| 45 | struct stat stbuf; | |
| 46 | ||
| 47 | userpc = 1; | |
| 48 | symfil = "a.out"; | |
| 49 | corfil = "core"; | |
| 50 | maxfile=1L<<24; maxstor=1L<<31; | |
| 51 | #ifndef STD | |
| 52 | #ifndef VAX135 | |
| 53 | maxstor -= ctob(UPAGES); | |
| 54 | #endif | |
| 55 | #endif | |
| 56 | ||
| 57 | setbuf(stdout, NULL); | |
| 58 | setbuf(stderr, NULL); | |
| 59 | ||
| 60 | WHILE argc>1 | |
| 61 | DO IF eqstr("-w",argv[1]) | |
| 62 | THEN wtflag=2; argc--; argv++; | |
| 63 | ELSE break; | |
| 64 | FI | |
| 65 | OD | |
| 66 | ||
| 67 | IF argc>1 THEN symfil = argv[1]; FI | |
| 68 | IF argc>2 THEN corfil = argv[2]; FI | |
| 69 | fp = filework; | |
| 70 | if (argc > 3) { | |
| 71 | for (p = argv[3]; *p; *fp++ = *p++) ; | |
| 72 | *fp++ = '/'; | |
| 73 | } | |
| 74 | argcount=argc; | |
| 75 | ||
| 76 | if (stat(symfil, &stbuf) == -1) { | |
| 77 | printf("`%s' does not exist\n", symfil); | |
| 78 | exit(4); | |
| 79 | } | |
| 80 | symtime = stbuf.st_mtime; | |
| 81 | if (stat(corfil, &stbuf) != -1) { | |
| 82 | if (symtime > stbuf.st_mtime) | |
| 83 | printf("Warning: `%s' newer than `%s'\n", | |
| 84 | symfil, corfil); | |
| 85 | } | |
| 86 | ||
| 87 | setsym(); setcor(); | |
| 88 | initfp(); | |
| 89 | mkioptab(); | |
| 90 | ||
| 91 | /* set up variables for user */ | |
| 92 | maxoff=MAXOFF; maxpos=MAXPOS; | |
| 93 | gtty(2, &sdbttym); | |
| 94 | IF (sigint= (ADDR) signal(SIGINT,01))!=01 | |
| 95 | THEN sigint= (ADDR) fault; signal(SIGINT,fault); | |
| 96 | FI | |
| 97 | sigqit= (ADDR) signal(SIGQUIT,1); | |
| 98 | signal(SIGILL, fpe); | |
| 99 | ||
| 100 | setjmp(env); | |
| 101 | if (debug) printf("Sdb restarted\n"); | |
| 102 | gtty(2, &userttym); | |
| 103 | if (sdbttym.sg_flags != userttym.sg_flags) | |
| 104 | stty(2, &sdbttym); | |
| 105 | IF executing THEN delbp(); FI | |
| 106 | executing=FALSE; | |
| 107 | ||
| 108 | for (;;) { | |
| 109 | mkfault = 0; | |
| 110 | printf("*"); | |
| 111 | if (decode(readline(stdin)) == 1) { | |
| 112 | printf("Error; try again\n"); | |
| 113 | continue; | |
| 114 | } | |
| 115 | ||
| 116 | if (debug) { | |
| 117 | printf("cmd %c:\n", cmd); | |
| 118 | printf("%s:%s\n", proc, var); | |
| 119 | printf("args-%s;re-%s;integ-%d\n", args, re, integ); | |
| 120 | printf("scallf-%d;reflg-%d\n", scallf, reflag); | |
| 121 | printf("colonflag-%d;ncolonflag-%d\n\n", | |
| 122 | colonflag, ncolonflag); | |
| 123 | } | |
| 124 | docommand(); | |
| 125 | } | |
| 126 | } | |
| 127 | ||
| 128 | ||
| 129 | fault(a) | |
| 130 | { | |
| 131 | signal(a,fault); | |
| 132 | mkfault++; | |
| 133 | printf("\n"); | |
| 134 | longjmp(env, 0); | |
| 135 | } | |
| 136 | ||
| 137 | fpe() { | |
| 138 | signal(SIGILL, fpe); | |
| 139 | error("Illegal floating constant"); | |
| 140 | longjmp(env, 0); | |
| 141 | } |