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Michael Brown cc9f31ee0c [librm] Do not unconditionally preserve flags across virt_call() ... Commit 196f0f2 ("[librm] Convert prot_call() to a real-mode near call") introduced a regression in which any deliberate modification to the low 16 bits of the CPU flags (in struct i386_all_regs) would be overwritten with the original flags value at the time of entry to prot_call(). The regression arose because the alignment requirements of the protected-mode stack necessitated the insertion of two bytes of padding immediately below the prot_call() return address. The solution chosen was to extend the existing "pushfl / popfl" pair to "pushfw;pushfl / popfl;popfw". The extra "pushfw / popfw" appears at first glance to be a no-op, but fails to take into account the fact that the flags restored by popfl may have been deliberately modified by the protected-mode function. Fix by replacing "pushfw / popfw" with "pushw %ss / popw %ss". While %ss does appear within struct i386_all_regs, any modification to the stored value has always been ignored by prot_call() anyway. The most visible symptom of this regression was that SAN booting would fail since every INT 13 call would be chained to the original INT 13 vector. Reported-by: Vishvananda Ishaya <vishvananda@gmail.com> Reported-by: Jamie Thompson <forum.ipxe@jamie-thompson.co.uk> Signed-off-by: Michael Brown <mcb30@ipxe.org>		2016-03-12 12:39:17 +00:00
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arch	[librm] Do not unconditionally preserve flags across virt_call()	2016-03-12 12:39:17 +00:00
bin	Rename .cvsignore files to .gitignore	2007-06-09 22:57:00 +01:00
config	[xsigo] Add support for Xsigo virtual Ethernet (XVE) EoIB devices	2016-03-09 08:46:24 +00:00
core	[pixbuf] Check for unsigned integer overflow on multiplication	2016-03-12 00:09:23 +00:00
crypto	[crypto] Allow for zero-length ASN.1 cursors	2016-03-11 16:58:51 +00:00
doc	[build] Rename gPXE to iPXE	2010-04-19 23:43:39 +01:00
drivers	[eoib] Support non-FullMember gateway devices	2016-03-09 08:43:40 +00:00
hci	[infiniband] Add "ibstat" command	2016-03-08 17:38:06 +00:00
image	[efi] Add support for EFI_GRAPHICS_OUTPUT_PROTOCOL frame buffer consoles	2015-10-16 16:38:41 +01:00
include	[arp] Validate length of ARP packet	2016-03-12 01:24:03 +00:00
interface	[efi] Work around broken GetFontInfo() implementations	2016-03-10 18:09:59 +00:00
libgcc	[build] Mark __intel_new_proc_init with __libgcc rather than cdecl	2009-08-03 15:56:10 +01:00
net	[arp] Validate length of ARP packet	2016-03-12 01:24:03 +00:00
tests	[iobuf] Improve robustness of I/O buffer allocation	2016-02-11 19:04:23 +00:00
usr	[ifmgmt] Include human-readable error message for configuration failure	2016-03-08 17:45:30 +00:00
util	[efi] Add %.usb target for building EFI-bootable USB (or other) disk images	2015-12-07 13:08:22 +00:00
.gitignore	[build] Add support for local configuration files	2010-03-26 19:07:22 +00:00
doxygen.cfg	[build] Remove PACKED macro	2010-05-29 23:49:47 +01:00
Makefile	[librm] Add support for running in 64-bit long mode	2016-02-24 03:10:12 +00:00
Makefile.housekeeping	[debug] Allow debug colourisation to be disabled	2016-01-12 15:39:14 +00:00