robin.thoni/ipxe - git rthoni.com

Michael Brown 1137fa3268 [romprefix] Do not clobber stack segment when returning to BIOS Commit c429bf0 ("[romprefix] Store boot bus:dev.fn address as autoboot device location") introduced a regression by using register %cx to temporarily hold the PCI bus:dev.fn address, despite the fact that %cx was already being used to hold the stored BIOS stack segment. Consequently, when returning to the BIOS after a failed or cancelled boot attempt, iPXE would end up calling INT 18 with the stack segment set equal to the PCI bus:dev.fn address. Writing to essentially random areas of memory tends to upset even the more robust BIOSes. Fix by using register %ax to temporarily hold the PCI bus:dev.fn address. Reported-by: Anton D. Kachalov <mouse@yandex-team.ru> Tested-by: Anton D. Kachalov <mouse@yandex-team.ru> Signed-off-by: Michael Brown <mcb30@ipxe.org>		10 år sedan
contrib	[errdb] Strip platform error code for non-platform-generated errors	11 år sedan
src	[romprefix] Do not clobber stack segment when returning to BIOS	10 år sedan
COPYING	Initial revision	19 år sedan
COPYRIGHTS	[build] Rename gPXE to iPXE	14 år sedan
README	[doc] Re-add README file	14 år sedan

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org