gdb/testsuite/gdb.asm/m68hc11.inc

   1         comment "subroutine prologue"
   2         .macro gdbasm_enter
   3         ldx     _.frame
   4         pshx
   5         sts     _.frame
   6         .endm
   7
   8         comment "subroutine epilogue"
   9         .macro gdbasm_leave
  10         pulx
  11         stx     _.frame
  12         rts
  13         .endm
  14
  15         .macro gdbasm_call subr
  16         jsr     \subr
  17         .endm
  18
  19         .macro gdbasm_several_nops
  20         nop
  21         nop
  22         nop
  23         nop
  24         .endm
  25
  26         comment "exit (0)"
  27         .macro gdbasm_exit0
  28         clra
  29         clrb
  30         wai
  31         .endm
  32
  33         comment "crt0 startup"
  34         .macro gdbasm_startup
  35         .sect .data
  36         .globl _.frame
  37 _.frame: .word 0
  38         .previous
  39         lds     #0x2000
  40         ; the linker script maps the data section in ROM (LMA) for its initial
  41         ; content and in RAM (VMA) for its runtime value.  We have to do
  42         ; what the default crt0 does: copy the ROM part in RAM.
  43         ; (otherwise any 'globalvar' appears uninitialized)
  44         ldx     #__data_image
  45         ldy     #__data_section_start
  46         bra     Start_map
  47 Loop:
  48         ldaa    0,x
  49         staa    0,y
  50         inx
  51         iny
  52 Start_map:
  53         cpx     #__data_image_end
  54         blo     Loop
  55 Done:
  56         clr     _.frame
  57         clr     _.frame+1
  58         .endm
  59
  60         comment "Declare a data variable"
  61         .purgem gdbasm_datavar
  62         .macro gdbasm_datavar name value
  63         .data
  64 \name:
  65         .word   \value
  66         .endm