| /* %%%%%%%%%%%%%%%%%%%% (c) William Landi 1991 %%%%%%%%%%%%%%%%%%%%%%%%%%%% */ |
| /* Permission to use this code is granted as long as the copyright */ |
| /* notice remains in place. */ |
| |
| /* ================================ loadexe.c ============================== */ |
| /* Sets up the machine from the executable file ('loads' program) */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include "boolean.h" |
| #include "stringI.h" |
| #include "memory.h" |
| #include "constants.h" |
| #include "convert.h" |
| #include "machine.h" |
| #include "debugger.h" |
| |
| /* ------------------------------ LOAD ------------------------------------- */ |
| /* Load the program from the executable file. */ |
| void LOAD(BOOLEAN DEBUG_MODE,int *ERROR,FILE *INPUT) |
| { |
| char *RECORD; /* One record from the input stream */ |
| int LENGTH; /* Used to store length of blocks of */ |
| /* memory affected by text and modification*/ |
| /* records */ |
| int LOCATION = 0; /* Location to load next csect */ |
| char MODULE_NAME[LABEL_SIZE_1+1]; /* Name of a module of program. */ |
| |
| MODULE_NAME[LABEL_SIZE_1] = '\0'; |
| |
| if (feof(INPUT)) (*ERROR) = TRUE_1; |
| else { |
| GET_LINE(&RECORD,INPUT); |
| if ((RECORD[0] != 'S') || (strlen(RECORD) != 14)) (*ERROR) = TRUE_1; |
| else { |
| /* ---------------------------- START RECORD ------------------------------- */ |
| if (DEBUG_MODE) { |
| MAIN_ROUTINE[LABEL_SIZE_1] = '\0'; |
| (void) strncpy(MAIN_ROUTINE,&(RECORD[1]),LABEL_SIZE_1); |
| } |
| STR_TO_NUM(&(RECORD[LABEL_SIZE_1+1]), 5, 16, |
| &START_ADDRESS,ERROR); |
| } |
| } |
| |
| while (!feof(INPUT) && (LOCATION <= MEM_SIZE_1) && !(*ERROR)) { |
| |
| GET_LINE(&RECORD,INPUT); |
| switch (RECORD[0]) { |
| |
| case 'T': |
| /* ---------------------------- TEXT RECORD -------------------------------- */ |
| if (strlen(RECORD) < 9) |
| (*ERROR) = TRUE_1; |
| else { |
| |
| STR_TO_NUM(&(RECORD[1]),6,16,&LOCATION,ERROR); |
| STR_TO_NUM(&(RECORD[7]),2,16,&LENGTH,ERROR); |
| if (strlen(RECORD) != 9+LENGTH*2) (*ERROR) = TRUE_1; |
| else STORE_AT(&(RECORD[9]), LENGTH, LOCATION, MEMORY,ERROR); |
| } |
| break; |
| |
| |
| case 'M': |
| /* ---------------------- MODULE RECORD ------------------------------------ */ |
| if (strlen(RECORD) != (13 + LABEL_SIZE_1)) (*ERROR) = TRUE_1; |
| else if (DEBUG_MODE) { |
| |
| (void) strncpy(MODULE_NAME,&(RECORD[1]),LABEL_SIZE_1); |
| STR_TO_NUM(&(RECORD[9]),6,16,&LOCATION,ERROR); |
| (*ERROR) = !INSERT_IN_SYM_TAB(GLOBAL_1,MODULE_NAME,LOCATION,MODULE, |
| &SYM_TAB); |
| STR_TO_NUM(&(RECORD[15]),6,16,&LENGTH,ERROR); |
| (*LOOK_UP_SYMBOL(GLOBAL_1,MODULE_NAME,&SYM_TAB)).LENGTH = LENGTH; |
| } |
| |
| break; |
| |
| case 'G': |
| /* ----------------------- GLOBAL RECORD ----------------------------------- */ |
| if (strlen(RECORD) != (7 + LABEL_SIZE_1)) (*ERROR) = TRUE_1; |
| else if (DEBUG_MODE) { |
| |
| (void) strncpy(MODULE_NAME,&(RECORD[1]),LABEL_SIZE_1); |
| STR_TO_NUM(&(RECORD[9]),6,16,&LOCATION,ERROR); |
| (*ERROR) = !INSERT_IN_SYM_TAB(GLOBAL_1,MODULE_NAME,LOCATION,GLOBAL, |
| &SYM_TAB); |
| } |
| |
| break; |
| |
| case '\0': |
| default: |
| break; |
| } |
| } |
| if (*ERROR) |
| (void) printf("ERROR: Input is not an executable file. Aborting.\n"); |
| } |
