Function getLINKEDITData

lldb_commands/ds.py:337–438

(section)

    return (indeces, stringList)

def getLINKEDITData(section):
    addr = section.addr
    module = addr.GetModule()
    target = getTarget()
    fileHeaderAddr = module.GetObjectFileHeaderAddress().GetLoadAddress(target)

    LINKEDITAddr = section.GetLoadAddress(target)
    indeces = []
    stringList = []

    script = generateMachOHeaders()
    script += 'uintptr_t baseAddress = (uintptr_t){};\n'.format(fileHeaderAddr)
    # script += 'uintptr_t linkeditAddress = (uintptr_t){};\n'.format(LINKEDITAddr)
    script += r'''

@import Foundation;
ds_symtab_command *symtab_cmd = NULL;
ds_dysymtab_command *dysymtab_cmd = NULL;
char *strtab = NULL;

ds_header *dsheader = (ds_header *)baseAddress;
ds_section *la_section = NULL;

ds_segment *cur_seg = NULL;
ds_segment *linkeditSegment = NULL;
struct nlist_64 *symtab = NULL;
uintptr_t pagezero = 0;

uintptr_t cur = baseAddress + sizeof(ds_header);
for (int i = 0; i < dsheader->ncmds; i++, cur += cur_seg->cmdsize) {
    cur_seg = (ds_segment *)cur;
    if (cur_seg->cmd == 0x2) { // LC_SYMTAB
        symtab_cmd = (ds_symtab_command *)cur_seg;
      
    } else if (cur_seg->cmd == 0xb) { // LC_DYSYMTAB
        dysymtab_cmd = (ds_dysymtab_command *)cur_seg;
    } 
    else if (cur_seg->cmd == 0x19 && strcmp(cur_seg->segname, "__LINKEDIT") == 0) {
        // pagezero = cur_seg->vmsize;
        linkeditSegment = cur_seg;
    }
    else if (cur_seg->cmd == 0x19 && strcmp(cur_seg->segname, "__PAGEZERO") == 0) {
        pagezero = cur_seg->vmsize;
    }
}

strtab = (char *)(symtab_cmd->stroff + baseAddress + linkeditSegment->vmaddr - linkeditSegment->fileoff - pagezero);
symtab = (struct nlist_64 *)(symtab_cmd->symoff + baseAddress + linkeditSegment->vmaddr - linkeditSegment->fileoff - pagezero);
uintptr_t linkedit_base = baseAddress + linkeditSegment->vmaddr - linkeditSegment->fileoff - pagezero;

NSMutableString *returnString = [NSMutableString new];
if (symtab_cmd) {
    [returnString appendString:@"LC_SYMTAB\n"];
    [returnString appendString:(id)[NSString stringWithFormat:@"\t[%012p] symtab (%d entries)\n", symtab, symtab_cmd->nsyms]];
    [returnString appendString:(id)[NSString stringWithFormat:@"\t[%012p] strtab (size %d)\n", strtab, symtab_cmd->strsize]];
} 

if (dysymtab_cmd) {