On a Dell OptiPlex 7010, calling DisconnectController() on the LOM
device handle will lock up the system. Debugging shows that execution
is trapped in an infinite loop that is somehow trying to reconnect
drivers (without going via ConnectController()).
The problem can be reproduced in the UEFI shell with no iPXE code
present, by using the "disconnect" command. Experimentation shows
that the only fix is to unload (rather than just disconnect) the
"Ip4ConfigDxe" driver.
Add the concept of a blacklist of UEFI drivers that will be
automatically unloaded when iPXE runs as an application, and add the
Dell Ip4ConfigDxe driver to this blacklist.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The Option::ROM module recognizes and checks EFI header of image. The
disrom.pl utility dumps this header if is present.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[util] Improve processing of ROM images in Option::ROM
The Option::ROM module now compares the Code Type in the PCIR header
to 0x00 (PC-AT) in order to check the presence of other header types
(PnP, UNDI, iPXE, etc). The validity of these headers are checked not
only by offset, but by range and signature checks also. The image
checksum and initial size also depends on Code Type.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
GCC 9 warns that abs() may truncate its signed long argument. Fix by
using labs() instead.
Reported-by: Martin Liška <mliska@suse.cz>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[libc] Fix strcmp()/strncmp() to return proper values
Fix strcmp() and strncmp() to return proper standard positive/negative
values for unequal strings. Current implementation is backwards
(i.e. the functions are returning negative when should be positive and
vice-versa).
Currently all consumers of these functions only check the return value
for ==0 or !=0 and so we can safely change the implementation without
breaking things.
Signed-off-by: Aaron Young <Aaron.Young@oracle.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Current (simplified):
1. InstallMultipleProtocolInterfaces
if err goto err_install_protocol_interface;
2. OpenProtocol(efi_nii_protocol_guid)
if err goto err_open_nii;
3. OpenProtocol(efi_nii31_protocol_guid)
if err goto err_open_nii31;
4. efi_child_add
if err goto err_efi_child_add;
...
err_efi_child_add:
CloseProtocol(efi_nii_protocol_guid) <= should be efi_nii31_protocol_guid
err_open_nii: <= should be err_open_nii31
CloseProtocol(efi_nii31_protocol_guid) <= should be efi_nii_protocol_guid
err_open_nii31: <= should be err_open_nii
UninstallMultipleProtocolInterfaces
Signed-off-by: Ignat Korchagin <ignat@cloudflare.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[pci] Correct invalid base-class/sub-class/prog-if order in PCIR
PCI Configuration Space contains fields prog-if at the offset 0x09,
sub-class at the offset 0x0a and base-class at the offset 0x0b (it
respects little endian). PCIR structure uses these fields in the same
order.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Starting from binutils 2.31.0 (commit bd7ab16b) x86-64 assembler
generates R_X86_64_PLT32 instead of R_X86_64_PC32.
Acked-by: John Jolly <jjolly@suse.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The first adapters in this family are X2522-10, X2522-25, X2541 and
X2542.
These no longer use PCI BAR 0 for I/O, but use that for memory. In
other words, BAR 2 on SFN8xxx adapters now becomes BAR 0.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[ethernet] Use standard 1500 byte MTU unless explicitly overridden
Devices that support jumbo frames will currently default to the
largest possible MTU. This assumption is valid for virtual adapters
such as virtio-net, where the MTU must have been configured by a
system administrator, but is unsafe in the general case of a physical
adapter.
Default to the standard Ethernet MTU, unless explicitly overridden
either by the driver or via the ${netX/mtu} setting.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[rndis] Clean up error handling path in register_rndis()
Avoid calling rndis_halt() and rndis->op->close() twice if the call to
register_netdev() fails.
Reported-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[build] Use positive-form tests when checking for supported warnings
Some versions of gcc seem to silently accept an attempt to disable an
unrecognised warning (e.g. via -Wno-stringop-truncation) but will then
report the unrecognised warning if any other error occurs during the
build, resulting in a potentially misleading error message.
Avoid this potential confusion by using the positive-form tests in
order to determine the workaround CFLAGS.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The definition of version_response channel message in Linux doesn't
include version field, so the upcoming VMBus implementation in QEMU
doesn't set it either. Neither Windows nor Linux had any problem with
this.
The check against this field is redundant because the message is the
response to initiate_contact message containing the specific version
requested, so the response with version_supported=true is unambiguous.
Drop this check and don't rely on the field to be present in the
message.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
register_netdev expects ->hw_addr and ->ll_addr to be already filled,
so move it towards the end of register_rndis, after the respective
fields have been successfully queried from the underlying device.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The gcc 8 compiler introduces a warning for certain string
manipulation functions, flagging usages which _may_ not be intended.
An audit of the iPXE sources indicates all usages of strncat and
strncpy are as intended, so the warnings currently issued are not
helpful, especially if warnings are considered errors.
Fix by detecting gcc's support for -Wno-stringop-truncation and, if
detected, using that option to avoid the warning.
Signed-off-by: Bruce Rogers <brogers@suse.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Also-fixed-by: Christian Hesse <list@eworm.de>
Also-fixed-by: Roman Kagan <rkagan@virtuozzo.com>
Also-fixed-by: Bernhard M. Wiedemann <bwiedemann@suse.de>
Also-fixed-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[http] Work around stateful authentication schemes
As pointedly documented in RFC7230 section 2.3, HTTP is a stateless
protocol: each request message can be understood in isolation from any
other requests or responses. Various authentication schemes such as
NTLM break this fundamental property of HTTP and rely on the same TCP
connection being reused.
Work around these broken authentication schemes by ensuring that the
most recently pooled connection is reused for the subsequent
authentication retry.
Reported-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Tested-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Add the function mii_find() in order to locate the PHY address.
Signed-off-by: Sylvie Barlow <sylvie.c.barlow@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[mii] Separate concepts of MII interface and MII device
We currently have no generic concept of a PHY address, since all
existing implementations simply hardcode the PHY address within the
MII access methods.
A bit-bashing MII interface will need to be provided with an explicit
PHY address in order to generate the correct waveform. Allow for this
by separating out the concept of a MII device (i.e. a specific PHY
address attached to a particular MII interface).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[undi] Include subsystem IDs in broken interrupt device check
Allow the subsystem IDs to be used when checking for PXE stacks with
broken interrupt support.
Suggested-by: Levi Hsieh <Levi.Hsieh@dell.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The relocation type R_ARM_REL32 is generated when building
bin-arm32-efi/snp.efi using gcc 6.3 and ld 2.28.
R_ARM_REL32 is a program counter (PC) relative 32 bit relocation so we
can ignore it like all other PC relative relocations.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[efi] Do not raise TPL within EFI_DRIVER_BINDING_PROTOCOL.Supported()
When booting some versions of the UEFI shell, our driver binding
protocol's Supported() entry point is called at TPL_NOTIFY for no
discernible reason. Attempting to raise to TPL_CALLBACK triggers an
immediate assertion failure in the firmware.
Since our Supported() method can run at any TPL, fix by simply not
attempting to raise the TPL within this method.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[efi] Release SNP devices before starting SAN boot image
Release SNP devices to allow the SAN booted image to use our
EFI_SIMPLE_NETWORK_PROTOCOL instance, and to ensure that the image is
started at TPL_APPLICATION.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[tls] Ensure that window change is propagated to plainstream interface
The cipherstream xfer_window_changed() message is used to retrigger
the TLS transmit state machine. If the transmit state machine is
idle, then the window change message will not be propagated to the
plainstream interface. This can potentially cause the plainstream
interface peer (e.g. httpcore) to block waiting for a window change
message that will never arrive.
Fix by ensuring that the window change message is propagated to the
plainstream interface if the transmit state machine is idle. (If the
transmit state machine is not idle then the plainstream window will be
zero anyway.)
Signed-off-by: Michael Brown <mcb30@ipxe.org>
In TLS terminology a session conceptually spans multiple individual
connections, and essentially represents the stored cryptographic state
(master secret and cipher suite) required to establish communication
without going through the certificate and key exchange handshakes.
Rename tls_session to tls_connection in order to make the name
tls_session available to represent the session state.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[tls] Ensure received data list is initialised before calling tls_free()
A failure in tls_generate_random() will result in a call to ref_put()
before the received data list has been initialised, which will cause
free_tls() to attempt to traverse an uninitialised list.
Fix by ensuring that all fields referenced by free_tls() are
initialised before any of the potential failure paths.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[librm] Ensure that inline code symbols are unique
Commit 6149e0a ("[librm] Provide symbols for inline code placed into
other sections") may cause build failures due to duplicate label names
if the compiler chooses to duplicate inline assembly code.
Fix by using the "%=" special format string to include a
guaranteed-unique number within the label name.
The "%=" will be expanded only if constraints exist for the inline
assembly. This fix therefore requires that all REAL_CODE() fragments
use a (possibly empty) constraint list.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[librm] Provide symbols for inline code placed into other sections
Provide symbols constructed from the object name and line number for
code fragments placed into alternative sections, such as inline
REAL_CODE() assembly placed into .text16. This simplifies the
debugging task of finding the source code corresponding to a given
instruction pointer.
Note that we cannot use __FUNCTION__ since it is not a preprocessor
macro and so cannot be concatenated with string literals.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[undi] Treat invalid IRQ numbers as non-fatal errors
If the underlying PXE stack reports an invalid IRQ number (above
IRQ_MAX), treat this as equivalent to an empty IRQ number and fall
back to using polling mode.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The existence of MMX and SSE is required by the System V x86_64 ABI
and so is assumed by gcc, but these registers are not preserved by our
own interrupt handlers and are unlikely to be preserved by other
context switch handlers in a boot firmware environment.
Explicitly prevent gcc from using MMX or SSE registers to avoid
potential problems due to silent register corruption.
We must remove the %xmm0-%xmm5 clobbers from the x86_64 version of
hv_call() since otherwise gcc will complain about unknown register
names. Theoretically, we should probably add code to explicitly
preserve the %xmm0-%xmm5 registers across a hypercall, in order to
guarantee to external code that these registers remain unchanged. In
practice this is difficult since SSE registers are disabled by
default: for background information see commits 71560d1 ("[librm]
Preserve FPU, MMX and SSE state across calls to virt_call()") and
dd9a14d ("[librm] Conditionalize the workaround for the Tivoli VMM's
SSE garbling").
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[rng] Use fixed-point calculations for min-entropy quantities
We currently perform various min-entropy calculations using build-time
floating-point arithmetic. No floating-point code ends up in the
final binary, since the results are eventually converted to integers
and asserted to be compile-time constants.
Though this mechanism is undoubtedly cute, it inhibits us from using
"-mno-sse" to prevent the use of SSE registers by the compiler.
Fix by using fixed-point arithmetic instead.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This is required to work around a bug in some firmware versions.
Signed-off-by: Ameer Mahagneh <ameerm@mellanox.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[time] Add support for the ACPI power management timer
Allow the ACPI power management timer to be used if enabled via
TIMER_ACPI in config/timer.h. This provides an alternative timer on
systems where the standard 8254 PIT is unavailable or unreliable.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[efi] Provide Map_Mem() and associated UNDI callbacks
Some drivers are known to call the optional Map_Mem() callback without
first checking that the callback exists. Provide a usable basic
implementation of Map_Mem() along with the other callbacks that become
mandatory if Map_Mem() is provided.
Note that in theory the PCI I/O protocol is allowed to require
multiple calls to Map(), with each call handling only a subset of the
overall mapped range. However, the reference implementation in EDK2
assumes that a single Map() will always suffice, so we can probably
make the same simplifying assumption here.
Tested with the Intel E3522X2.EFI driver (which, incidentally, fails
to cleanly remove one of its mappings).
Originally-implemented-by: Maor Dickman <maord@mellanox.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[lacp] Check the partner's own state when checking for blocked links
The blocked link test in eth_slow_lacp_rx() is performed before the
actor TLV is copied to the partner TLV, and so must test the actor
state field rather than the partner state field.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some CAs provide non-functional OCSP servers, and some clients are
forced to operate on networks without access to the OCSP servers.
Allow the user to explicitly disable the use of OCSP checks by
undefining OCSP_CHECK in config/crypto.h.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Limit the profile sample count to INT_MAX to avoid both signed
overflow and a potential division by zero when updating the stored
mean value.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Michael Brown