| ;;; Test 68HC12 FAR trampoline generation |
| ;;; 2 trampolines are generated: |
| ;;; - one for '_far_bar' |
| ;;; - one for '_far_foo' |
| ;;; 'far_no_tramp' does not have any trampoline generated. |
| ;;; |
| .sect .text |
| .globl _start |
| _start: |
| start: |
| lds #stack-1 |
| ldx #0xabcd |
| pshx |
| ldd #0x1234 |
| ldx #0x5678 |
| bsr _far_bar ; Call to trampoline generated code |
| cpx #0x1234 |
| bne fail ; X and D preserved (swapped by _far_bar) |
| cpd #0x5678 |
| bne fail |
| pulx |
| cpx #0xabcd ; Stack parameter preserved |
| bne fail |
| ldd #_far_foo ; Get address of trampoline handler |
| xgdx |
| jsr 0,x |
| ldd #_far_bar ; Likewise (unique trampoline check) |
| xgdy |
| jsr 0,y |
| call _far_no_tramp ; No trampoline generated for _far_no_tramp |
| clra |
| clrb |
| wai |
| fail: |
| ldd #1 |
| wai |
| bra start |
| |
| .sect .bank1,"ax" |
| .globl _far_bar |
| .far _far_bar ; Must mark symbol as far |
| _far_bar: |
| jsr local_bank1 |
| xgdx |
| rtc |
| |
| local_bank1: |
| rts |
| |
| .sect .bank2,"ax" |
| .globl _far_foo |
| .far _far_foo |
| _far_foo: |
| jsr local_bank2 |
| rtc |
| |
| local_bank2: |
| rts |
| |
| .sect .bank3,"ax" |
| .globl _far_no_tramp |
| .far _far_no_tramp |
| _far_no_tramp: |
| jsr local_bank3 |
| rtc |
| |
| local_bank3: |
| rts |
| |
| .sect .text |
| .globl __far_trampoline |
| __far_trampoline: |
| movb 0,sp, 2,sp ; Copy page register below the caller's return |
| leas 2,sp ; address. |
| jmp 0,y ; We have a 'call/rtc' stack layout now |
| ; and can jump to the far handler |
| ; (whose memory bank is mapped due to the |
| ; call to the trampoline). |
| |
| .sect .bss |
| .skip 100 |
| stack: |
| |
