lldb/test/API/macosx/unregistered-macho/main.c

   1 #include <mach-o/loader.h>
   2 #include <mach/machine.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <uuid/uuid.h>
   6
   7 int main() {
   8   int size_of_load_cmds =
   9       sizeof(struct segment_command_64) + sizeof(struct uuid_command);
  10   uint8_t *macho_buf =
  11       (uint8_t *)malloc(sizeof(struct mach_header_64) + size_of_load_cmds);
  12   uint8_t *p = macho_buf;
  13   struct mach_header_64 mh;
  14   mh.magic = MH_MAGIC_64;
  15   mh.cputype = CPU_TYPE_ARM64;
  16   mh.cpusubtype = 0;
  17   mh.filetype = MH_EXECUTE;
  18   mh.ncmds = 2;
  19   mh.sizeofcmds = size_of_load_cmds;
  20   mh.flags = MH_NOUNDEFS | MH_DYLDLINK | MH_TWOLEVEL | MH_PIE;
  21
  22   memcpy(p, &mh, sizeof(mh));
  23   p += sizeof(mh);
  24
  25   struct segment_command_64 seg;
  26   seg.cmd = LC_SEGMENT_64;
  27   seg.cmdsize = sizeof(seg);
  28   strcpy(seg.segname, "__TEXT");
  29   seg.vmaddr = 0x5000;
  30   seg.vmsize = 0x1000;
  31   seg.fileoff = 0;
  32   seg.filesize = 0;
  33   seg.maxprot = 0;
  34   seg.initprot = 0;
  35   seg.nsects = 0;
  36   seg.flags = 0;
  37
  38   memcpy(p, &seg, sizeof(seg));
  39   p += sizeof(seg);
  40
  41   struct uuid_command uuid;
  42   uuid.cmd = LC_UUID;
  43   uuid.cmdsize = sizeof(uuid);
  44   uuid_clear(uuid.uuid);
  45   uuid_parse("1b4e28ba-2fa1-11d2-883f-b9a761bde3fb", uuid.uuid);
  46
  47   memcpy(p, &uuid, sizeof(uuid));
  48   p += sizeof(uuid);
  49
  50   // If this needs to be debugged, the memory buffer can be written
  51   // to a file with
  52   // (lldb) mem rea -b -o /tmp/t -c `p - macho_buf` macho_buf
  53   // (lldb) platform shell otool -hlv /tmp/t
  54   // to verify that it is well formed.
  55
  56   // And inside lldb, it should be inspectable via
  57   // (lldb) script print(lldb.frame.locals["macho_buf"][0].GetValueAsUnsigned())
  58   // 105553162403968
  59   // (lldb) process plugin packet send
  60   // 'jGetLoadedDynamicLibrariesInfos:{"solib_addresses":[105553162403968]}]'
  61
  62   return 0; // break here
  63 }