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Revision 5a16eeb519c87fa4c437e838af81731b8d355052, 263 bytes
(checked in by H. Peter Anvin <hpa@…>, 5 years ago)
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memdump: a debugging utility to dump memory over a serial port
A memory-dumping utility which runs in real mode. Thus, it can be
used to get memory dumps from a relatively pristine system.
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| 1 | # |
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| 2 | # memset.S |
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| 3 | # |
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| 4 | # Minimal 16-bit memset() implementation |
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| 5 | # |
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| 6 | |
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| 7 | .text |
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| 8 | .code16gcc |
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| 9 | .globl memset |
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| 10 | .type memset, @function |
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| 11 | memset: |
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| 12 | cld |
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| 13 | pushw %di |
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| 14 | movw %ax,%di |
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| 15 | movb %dl,%al |
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| 16 | # The third argument is already in %cx |
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| 17 | rep ; stosb |
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| 18 | popw %di |
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| 19 | retl |
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| 20 | |
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| 21 | .size memset,.-memset |
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