Previous commits to support Memtest86+ 6.00+ split the files into
"memtest" (backwards compatible / new BIOS name) and "memtest.efi"
(new EFI name). However, the 6.00 non-EFI binaries are now
32/64-bit, and will not work with GRUB's linux16 boot when using GRUB
for BIOS boot.
- Legacy Memtest86+ pre-6.00 will continue to be "memtest", linux16
(continue to support builds on current Debian stable bullseye)
- Change 6.00+ filename to "memtest.bin"
- GRUB memtest.cfg contains logic for legacy / new bios / new EFI
- Change EFI boot from "chainloader" to "linux", which allows for
passing command line options to Memtest86+
- syslinux @MEMTEST@ will conditionally be memtest.bin or memtest
- @MEMTEST_BIN@ will conditionally be memtest.bin or memtest, but is
completely legacy at this point (all internal code paths now check
for @MEMTEST_DIR@/memtest or @MEMTEST_DIR@/memtest.bin)
Getting complicated, but this logic can be simplified again once we
no longer need to support current Debian stable.
- BIOS: Final filename doesn't change (memtest), but now uses a
64-bit version on amd64.
- EFI: Now included as memtest.efi; 32-bit on i386, 64-bit on amd64.
As it's GRUB-only, we can test for the existence of memtest.efi
(6.00+ only) in GRUB itself.
- Add @MEMTEST_DIR@ to facilitate directory-based testing in GRUB.
This expands upon the previous MVP commit
15e78a3eec .
backwards compatibility:
1. the new file will be included alongside any user custom config
2. rather than replace MEMTEST with an actual config entry, we replace it
with a line to import the content of the new file, and thus will work
just as before.
thus no backwards compatible breakage
Gbp-Dch: Short
Ryan Finnie
Lyndon Brown