[MS] Why is there no Windows hot-patching support for other architectures like 32-bit ARM and MIPS? - devamazonaws.blogspot.com

Windows hot-patching supports x86-32, x86-64, 64-bit ARM, and Itanium, but why not the other architctures like 32-bit ARM, MIPS, Alpha AXP, PowerPC, and SH-3?

These architectures fall into two buckets.

MIPS, Alpha AXP, PowerPC, and SH-3 all predate hot-patching, so they naturally couldn't conform to rules that didn't exist yet.

Meanwhile, 32-bit ARM support was introduced¹ to Windows in the Windows 8 era, and at that time, hot-patching had already existed. But there were no provisions for hot-patching 32-bit ARM binaries because hot-patching is a Windows Server feature. Since there was no version of Windows Server for 32-bit ARM, there was no need to support hot-patching on 32-bit ARM binaries.

¹ More accurately, re-introduced, since Windows CE supported 32-bit ARM as well.


Post Updated on October 2, 2026 at 03:00PM
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