ld/testsuite/ld-m68hc11/far-hc11.s

   1 ;;; Test 68HC11 FAR trampoline generation
   2 ;;; 2 trampolines are generated:
   3 ;;; - one for '_far_bar'
   4 ;;; - one for '_far_foo'
   5 ;;; 'far_no_tramp' does not have any trampoline generated.
   6 ;;;
   7         .sect .text
   8         .globl _start
   9 _start:
  10 start:
  11         lds     #stack
  12         ldx     #0xabcd
  13         pshx
  14         ldd     #0x1234
  15         ldx     #0x5678
  16         bsr     _far_bar        ; Call to trampoline generated code
  17         cpx     #0x1234
  18         bne     fail            ; X and D preserved (swapped by _far_bar)
  19         cpd     #0x5678
  20         bne     fail
  21         pulx
  22         cpx     #0xabcd         ; Stack parameter preserved
  23         bne     fail
  24         ldd     #_far_foo       ; Get address of trampoline handler
  25         xgdx
  26         jsr     0,x
  27         ldd     #_far_bar       ; Likewise (unique trampoline check)
  28         xgdy
  29         jsr     0,y
  30         ldaa    #%page(_far_no_tramp)
  31         ldy     #%addr(_far_no_tramp)
  32         bsr     __call_a16      ; No trampoline generated for _far_no_tramp
  33         clra
  34         clrb
  35         wai
  36 fail:
  37         ldd     #1
  38         wai
  39         bra     start
  40         .global __return
  41 __return:
  42         ins
  43         rts
  44
  45         .sect .bank1,"ax"
  46         .globl _far_bar
  47         .far _far_bar           ; Must mark symbol as far
  48 _far_bar:
  49         jsr     local_bank1
  50         xgdx
  51         jmp     __return
  52
  53 local_bank1:
  54         rts
  55
  56         .sect .bank2,"ax"
  57         .globl _far_foo
  58         .far _far_foo
  59 _far_foo:
  60         jsr     local_bank2
  61         jmp     __return
  62
  63 local_bank2:
  64         rts
  65
  66         .sect .bank3,"ax"
  67         .globl _far_no_tramp
  68         .far _far_no_tramp
  69 _far_no_tramp:
  70         jsr     local_bank3
  71         jmp     __return
  72
  73 local_bank3:
  74         rts
  75
  76         .sect .text
  77         .globl __far_trampoline
  78 __far_trampoline:
  79         psha                            ; (2) Save function parameter (high)
  80         ;; <Read current page in A>
  81         psha                            ; (2)
  82         ;; <Set currenge page from B>
  83         pshx                            ; (4)
  84         tsx                             ; (3)
  85         ldab    4,x                     ; (4) Restore function parameter (low)
  86         ldaa    2,x                     ; (4) Get saved page number
  87         staa    4,x                     ; (4) Save it below return PC
  88         pulx                            ; (5)
  89         pula                            ; (3)
  90         pula                            ; (3) Restore function parameter (high)
  91         jmp     0,y                     ; (4)
  92
  93         .globl __call_a16
  94 __call_a16:
  95         ;; xgdx                         ; (3)
  96         ;; <Read current page in A>     ; (3) ldaa _current_page
  97         psha                            ; (2)
  98         ;; <Set current page from B>    ; (4) staa _current_page
  99         ;; xgdx                         ; (3)
 100         jmp 0,y                         ; (4)
 101
 102         .sect .page0
 103         .skip 100
 104 stack:
 105