3 commits

Author	SHA1	Message	Date
tkchia	c937fbb222	[metal] Export struct offsets from C code (#625) ... Rather than computing them by hand.	2022-09-18 02:54:55 -07:00
tkchia	e0fabd1d49	[WIP] Get bare metal working outside of an emulator (#609) ... You can now run bare metal on bare metal! * Fix handling of int 0x15 eax = 0xe820 memory map * Fix some issues in initial page table creation * hello4.com now works outside emulators * Ensure area for identity page tables are zeroed first * Simplify logic for creating page table entries, this partly reverts 577c0f6226 * Add degenerate MBR partition entry, to ease testing Co-authored-by: tkchia <tkchia-cosmo@gmx.com>	2022-09-13 02:01:49 -07:00
Justine Tunney	edd9297eba	Support malloc() on bare metal ... Your Actually Portable Executables now contains a simple virtual memory that works similarly to the Linux Kernel in the sense that it maps your physical memory to negative addresses. This is needed to support mmap() and malloc(). This functionality has zero code size impact. For example the MODE=tiny LIFE.COM executable is still only 12KB in size. The APE bootloader code has also been simplified to improve readibility and further elevate the elegance by which we're able to support so many platforms thereby enhancing verifiability so that we may engender trust in this bootloading process.	2021-02-24 00:53:24 -08:00