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106 lines
1.8 KiB
ArmAsm
106 lines
1.8 KiB
ArmAsm
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;;; Test 68HC11 FAR trampoline generation
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;;; 2 trampolines are generated:
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;;; - one for '_far_bar'
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;;; - one for '_far_foo'
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;;; 'far_no_tramp' does not have any trampoline generated.
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;;;
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.sect .text
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.globl _start
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_start:
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start:
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lds #stack
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ldx #0xabcd
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pshx
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ldd #0x1234
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ldx #0x5678
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bsr _far_bar ; Call to trampoline generated code
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cpx #0x1234
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bne fail ; X and D preserved (swapped by _far_bar)
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cpd #0x5678
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bne fail
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pulx
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cpx #0xabcd ; Stack parameter preserved
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bne fail
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ldd #_far_foo ; Get address of trampoline handler
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xgdx
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jsr 0,x
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ldd #_far_bar ; Likewise (unique trampoline check)
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xgdy
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jsr 0,y
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ldaa #%page(_far_no_tramp)
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ldy #%addr(_far_no_tramp)
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bsr __call_a16 ; No trampoline generated for _far_no_tramp
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clra
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clrb
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wai
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fail:
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ldd #1
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wai
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bra start
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.global __return
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__return:
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ins
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rts
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.sect .bank1,"ax"
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.globl _far_bar
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.far _far_bar ; Must mark symbol as far
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_far_bar:
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jsr local_bank1
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xgdx
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jmp __return
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local_bank1:
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rts
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.sect .bank2,"ax"
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.globl _far_foo
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.far _far_foo
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_far_foo:
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jsr local_bank2
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jmp __return
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local_bank2:
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rts
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.sect .bank3,"ax"
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.globl _far_no_tramp
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.far _far_no_tramp
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_far_no_tramp:
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jsr local_bank3
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jmp __return
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local_bank3:
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rts
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.sect .text
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.globl __far_trampoline
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__far_trampoline:
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psha ; (2) Save function parameter (high)
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;; <Read current page in A>
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psha ; (2)
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;; <Set currenge page from B>
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pshx ; (4)
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tsx ; (3)
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ldab 4,x ; (4) Restore function parameter (low)
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ldaa 2,x ; (4) Get saved page number
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staa 4,x ; (4) Save it below return PC
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pulx ; (5)
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pula ; (3)
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pula ; (3) Restore function parameter (high)
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jmp 0,y ; (4)
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.globl __call_a16
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__call_a16:
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;; xgdx ; (3)
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;; <Read current page in A> ; (3) ldaa _current_page
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psha ; (2)
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;; <Set current page from B> ; (4) staa _current_page
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;; xgdx ; (3)
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jmp 0,y ; (4)
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.sect .page0
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.skip 100
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stack:
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