runtime/objc-sel-table.s

   1 #include <TargetConditionals.h>
   2 #include <mach/vm_param.h>
   3
   4 #if __LP64__
   5 # define PTR(x) .quad x
   6 #else
   7 # define PTR(x) .long x
   8 #endif
   9
  10 .section __TEXT,__objc_opt_ro
  11 .align 3
  12 .private_extern __objc_opt_data
  13 __objc_opt_data:
  14 .long 15 /* table.version */
  15 .long 0 /* table.flags */
  16 .long 0 /* table.selopt_offset */
  17 .long 0 /* table.headeropt_ro_offset */
  18 .long 0 /* table.clsopt_offset */
  19 .long 0 /* table.protocolopt_offset */
  20 .long 0 /* table.headeropt_rw_offset */
  21 .space PAGE_MAX_SIZE-28
  22
  23 /* space for selopt, smax/capacity=1048576, blen/mask=524287+1 */
  24 .space 4*(8+256)  /* header and scramble */
  25 .space 524288     /* mask tab */
  26 .space 1048576     /* checkbytes */
  27 .space 1048576*4   /* offsets */
  28
  29 /* space for clsopt, smax/capacity=131072, blen/mask=32767+1 */
  30 .space 4*(8+256)        /* header and scramble */
  31 .space 32768            /* mask tab */
  32 .space 131072           /* checkbytes */
  33 .space 131072*12        /* offsets to name and class and header_info */
  34 .space 512*8            /* some duplicate classes */
  35
  36 /* space for some demangled protocol names */
  37 .space 1024
  38
  39 /* space for protocolopt, smax/capacity=16384, blen/mask=8191+1 */
  40 .space 4*(8+256)        /* header and scramble */
  41 .space 8192             /* mask tab */
  42 .space 16384             /* checkbytes */
  43 .space 16384*8           /* offsets */
  44
  45 /* space for 2048 header_info (RO) structures */
  46 .space 8 + (2048*16)
  47
  48
  49 .section __DATA,__objc_opt_rw
  50 .align 3
  51 .private_extern __objc_opt_rw_data
  52 __objc_opt_rw_data:
  53
  54 /* space for 2048 header_info (RW) structures */
  55 .space 8 + (2048*8)
  56
  57 /* space for 16384 protocols */
  58 #if __LP64__
  59 .space 16384 * 12 * 8
  60 #else
  61 .space 16384 * 12 * 4
  62 #endif
  63
  64
  65 /* section of pointers that the shared cache optimizer wants to know about */
  66 .section __DATA,__objc_opt_ptrs
  67 .align 3
  68
  69 #if TARGET_OS_OSX  &&  __i386__
  70 // old ABI
  71 .globl .objc_class_name_Protocol
  72 PTR(.objc_class_name_Protocol)
  73 #else
  74 // new ABI
  75 .globl _OBJC_CLASS_$_Protocol
  76 PTR(_OBJC_CLASS_$_Protocol)
  77 #endif