toolchain/gcc/libgloss/fr30/crt0.s

   1 # FR30 startup code
   2
   3         .section .text
   4         .global _start
   5 _start:
   6
   7         ;; Initialise the stack pointer
   8         ldi:32  __stack, r0
   9         mov     r0, sp
  10         mov     r0, fp
  11
  12         ;; Zero the data space
  13         ldi:32  #_edata, r0
  14         ldi:32  #_end,   r1
  15         ldi:8   #0,      r2
  16 .L0:
  17         st      r2, @r0
  18         add     #4, r0
  19         cmp     r1, r0
  20         blt     .L0
  21
  22         ;; Call global and static constructors
  23         ldi:32  _init, r0
  24         call    @r0
  25
  26         ;;  Setup destrcutors to be called from exit.
  27         ;;  (Just in case main never returns....)
  28         ldi:32  atexit, r0
  29         ldi:32  _fini, r4
  30         call    @r0
  31
  32         ;;  Initialise argc, argv and envp to empty
  33         ldi:8   #0, r4
  34         ldi:8   #0, r5
  35         ldi:8   #0, r6
  36
  37         ;; Call main
  38         ldi:32  main, r0
  39         call    @r0
  40
  41         ;; Jump to exit
  42         ldi:32  exit, r0
  43         call    @r0
  44
  45         ;; Should never reach here
  46         int     #9