52 lines
1.1 KiB
Plaintext
52 lines
1.1 KiB
Plaintext
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# The stack shouldn't grow into the code area.
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== code
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check-stack:
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# . prologue
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55/push-ebp
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89/<- %ebp 4/r32/esp
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# . save registers
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50/push-eax
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#
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89/<- %eax 4/r32/esp
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81 7/subop/compare %eax 0x48600/imm32
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{
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7f/jump-if-> break/disp8
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(abort "stack overflow")
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}
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$check-stack:end:
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# . restore registers
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58/pop-to-eax
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# . epilogue
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89/<- %esp 5/r32/ebp
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5d/pop-to-ebp
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c3/return
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show-stack-state:
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# . prologue
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55/push-ebp
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89/<- %ebp 4/r32/esp
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# . save registers
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50/push-eax
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51/push-ecx
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52/push-edx
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#
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89/<- %edx 4/r32/esp
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# save old cursor position
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(cursor-position 0) # => eax, ecx
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# print at top-right
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(set-cursor-position 0 0x70 0)
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(draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen 0 %edx 0xf 0xc)
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# restore cursor position
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(set-cursor-position %eax %ecx)
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$check-stack:end:
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# . restore registers
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5a/pop-to-edx
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59/pop-to-ecx
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58/pop-to-eax
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# . epilogue
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89/<- %esp 5/r32/ebp
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5d/pop-to-ebp
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c3/return
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