60 lines
666 B
Text
60 lines
666 B
Text
#
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#include <em_abs.h>
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mes 2,EM_WSIZE,EM_PSIZE
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.1
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bss EM_PSIZE,0,0
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.2
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bss EM_WSIZE,0,0
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pro $ctch,0
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lol 0
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loc EHEAP
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beq *1
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lae .1
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loi EM_PSIZE
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sig
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asp EM_PSIZE
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lol 0
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trp
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rtt
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1
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loc 1
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ste .2
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rtt
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end
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exp $_sbrk
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pro $_sbrk,0
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lor 2
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lor 2
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lpi $ctch
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sig
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lae .1
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sti EM_PSIZE
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loc 0
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ste .2
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lol 0
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ads EM_WSIZE ; this is the new heap pointer, but watch out for overflow!
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dup EM_PSIZE
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lor 2
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cmp ; compare with old heap pointer
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zlt *1
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str 2 ; The - possibly - occurring trap is caught
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lae .1
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loi EM_PSIZE
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sig
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asp EM_PSIZE
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loe .2
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zgt *1
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ret EM_PSIZE
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1
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asp EM_PSIZE
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loc -1
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loc EM_WSIZE
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loc EM_PSIZE
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cii
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ret EM_PSIZE
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end
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