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#include "load.h"
#include "qdme.h"
#include "elf.h"
#include <stdlib.h>
int LoadBinary(const char * const path) {
FILE *fp = fopen(path, "r");
if (fp == NULL) {
perror("LoadBinary");
return -1;
}
ElfHeader_t e = ReadElf(fp);
if (!ValidateElf(e)) {
return -1;
}
pc = e.e_entry;
const size_t n = e.e_phnum;
ProgramHeader_t *p = (ProgramHeader_t *)calloc(n, e.e_phentsize);
if (p == NULL) {
perror("calloc");
return -1;
}
ReadProgramHeader(n, p, fp);
for (size_t i = 0; i < n; i++) {
memsize += p[i].memsz;
}
if ((memory = (uint8_t *)calloc(memsize, sizeof(uint8_t))) == NULL) {
perror("calloc");
free((void *)p);
fclose(fp);
return -1;
}
for (size_t i = 0; i < n; i++) {
if (LoadProgramHeader(p[i], fp) == -1) {
free((void *)p);
fclose(fp);
return -1;
}
}
free((void *)p);
fclose(fp);
return 0;
}
/* LoadProgramHeader: Load the program segment described by the given program
* header from file fp. Returns 0 on success and -1 on failure. */
int LoadProgramHeader(ProgramHeader_t p, FILE *fp) {
uint8_t *memloc = memory + p.vaddr;
size_t s = p.filesz;
if (fseek(fp, p.offset, SEEK_SET) != 0) {
perror("fseek");
return -1;
}
fread(memloc, sizeof(uint8_t), s, fp);
if (ferror(fp)) {
return -1;
}
return 0;
}
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