30 lines
446 B
ArmAsm
30 lines
446 B
ArmAsm
.global strhp
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EHEAP=17
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strhp: ! %o0 = new heap pointer
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save %sp, -64, %sp
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set reghp, %o1
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st %i0, [%o1] ! it'll probably go right, anyway
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set limhp, %o1
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ld [%o1], %o2
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cmp %i0, %o2
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blt 1f
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nop
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add %i0, 0x400, %i0 ! extra 1K
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andn %i0, 0x3ff, %o0
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st %o0, [%o1] ! prematurely set limhp
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call brk
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nop
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tst %o0
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blt 2f ! failed
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nop
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set limhp, %o1
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st %o0, [%o1]
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1: ret
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restore
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2:
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restore
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set EHEAP, %o0
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set trp, %o1
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jmp %o1
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nop
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