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Add More Error Detection Code

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This commit is contained in:
TheBrokenRail 2020-11-22 13:07:10 -05:00
parent 2e06017429
commit 2f5692afc7
1 changed files with 17 additions and 1 deletions
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18
mods/src/core.c
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@ -15,7 +15,11 @@ static void iterate_text_section(text_section_callback callback, void *data) {
// Load Main Binary // Load Main Binary
char *real_path = realpath("/proc/self/exe", NULL); char *real_path = realpath("/proc/self/exe", NULL);
FILE *file_obj = fopen(real_path, "rb"); FILE *file_obj = fopen(real_path, "rb");
free(real_path);
// Verify Binary
if (!file_obj) {
ERR("Unable To Open Binary: %s", real_path);
}
// Get File Size // Get File Size
fseek(file_obj, 0L, SEEK_END); fseek(file_obj, 0L, SEEK_END);
@ -34,15 +38,27 @@ static void iterate_text_section(text_section_callback callback, void *data) {
Elf32_Shdr elf_strtab = elf_section_headers[elf_header->e_shstrndx]; Elf32_Shdr elf_strtab = elf_section_headers[elf_header->e_shstrndx];
unsigned char *elf_strtab_p = file_map + elf_strtab.sh_offset; unsigned char *elf_strtab_p = file_map + elf_strtab.sh_offset;
// Track .text Sections
int text_sections = 0;
// Iterate Sections // Iterate Sections
for (int i = 0; i < elf_section_header_count; ++i) { for (int i = 0; i < elf_section_header_count; ++i) {
Elf32_Shdr header = elf_section_headers[i]; Elf32_Shdr header = elf_section_headers[i];
char *name = (char *) (elf_strtab_p + header.sh_name); char *name = (char *) (elf_strtab_p + header.sh_name);
if (strcmp(name, ".text") == 0) { if (strcmp(name, ".text") == 0) {
(*callback)((void *) header.sh_addr, header.sh_size, data); (*callback)((void *) header.sh_addr, header.sh_size, data);
text_sections++;
} }
} }
// Ensure At Least .text Section Was Scanned
if (text_sections < 1) {
ERR("Unable To Find .text Sectons On: %s", real_path);
}
// Free Binary Path
free(real_path);
// Unmap And Close File // Unmap And Close File
munmap(file_map, size); munmap(file_map, size);
fclose(file_obj); fclose(file_obj);