32 lines
695 B
ArmAsm
32 lines
695 B
ArmAsm
/* https://github.com/cirosantilli/x86-bare-metal-examples#ss */
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#include "common.h"
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BEGIN
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/* Save the good sp for later. */
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mov %sp, %bx
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/* Control group: ss == 0. */
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mov $stack, %sp
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pop %ax
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/* Restore the old stack so that it won't mess with our other functions. */
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mov %bx, %sp
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PRINT_HEX <%al>
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/* Now let's move ss and see if anything happens. */
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mov $1, %ax
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mov %ax, %ss
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mov $stack, %sp
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/* This pop should happen 16 bytes higher than the first one. */
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pop %ax
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mov %bx, %sp
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PRINT_HEX <%al>
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hlt
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stack:
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.word 1
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/* 2 bytes from the word above + 14 = 16 */
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.skip 14
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/* This is at stack0 + 16 */
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.word 2
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