Исходное сообщение
"Интервью с разработчиками KolibriOS" Отправлено Vkni, 12-Фев-13 06:47
> А обращения к x86 железу и вообще x86-специфичные вещи как "компилировать" собрались? > Даже то же программирование GDT/IDT, например? Драйвера, ясен пень, надо переписывать: "Most of the OpenVMS kernel is in VAX assembly language (VAX MACRO- 32). Instead of rewriting the VAX MACRO-32 code in another language, we developed a compiler. In addition, we required inspection and manual modification of the VAX MACRO-32 code to deal with certain VAX architectural dependencies. Parts of the kernel that depended heavily on the VAX architecture were rewritten, but this was a small percentage of the total volume of VAX MACRO-32 source code. " Но методика того, что было сделано при портировании OpenVMS с VAX на Alpha вот - http://www.hpl.hp.com/hpjournal/dtj/vol4num4/vol4num4art7.pdf "Compiling VAX MACRO-32 Code for the Alpha AXP Architecture Simply stated, the VAX MACRO-32 compiler treats VAX MACRO-32 as a source language to be compiled and creates native OpenVMS AXP object files just as a FORTRAN compiler might. This task is far more complex than a simple instruction-by-instruction translation because of fundamental differences in the architectures, and because source code frequently contains assumptions about the VAX architecture and the OpenVMS Calling Standard on VAX systems.[3,4] The compiler must either transparently convert these VAX dependencies to their OpenVMS AXP counterparts or inform the user that the source code has to be changed. "