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The way we want to use the INITBSS segment - and especially the fact that it won't have the type bss on all ROM based targets - means that the name INITBSS is misleading. After all INIT is the best name from my perspective as it serves several purposes and therefore needs a rather generic name. Unfortunately this means that the current INIT segment needs to be renamed too. Looking for a short (ideally 4 letter) name I came up with ONCE as it contains all code (and data) accessed only once during initialization.
43 lines
815 B
ArmAsm
43 lines
815 B
ArmAsm
;
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; Ullrich von Bassewitz, 03.06.1998
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; Heap variables and initialization.
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;
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.constructor initheap, 24
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.import __BSS_RUN__, __BSS_SIZE__, __STACKSIZE__
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.importzp sp
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.include "_heap.inc"
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.data
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__heaporg:
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.word __BSS_RUN__+__BSS_SIZE__ ; Linker calculates this symbol
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__heapptr:
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.word __BSS_RUN__+__BSS_SIZE__ ; Dito
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__heapend:
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.word __BSS_RUN__+__BSS_SIZE__
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__heapfirst:
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.word 0
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__heaplast:
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.word 0
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; Initialization. Will be called from startup!
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.segment "ONCE"
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initheap:
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sec
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lda sp
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sbc #<__STACKSIZE__
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sta __heapend
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lda sp+1
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sbc #>__STACKSIZE__
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sta __heapend+1
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rts
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