| commit | d7c371619a287a3a74e23fc3fcff4793a12deba6 | [log] [tgz] |
|---|---|---|
| author | Arthur Heymans <arthur@aheymans.xyz> | Thu Apr 07 21:41:26 2022 +0200 |
| committer | Martin L Roth <gaumless@tutanota.com> | Sat May 28 05:07:57 2022 +0000 |
| tree | d1ae7edbfa6e89463f22be8b5cdad6b7be1a7831 | |
| parent | cb361da78fc53b7678b43026ae997af708246273 [diff] |
cpu/x86/smm_module_load: Rewrite setup_stub This code was hard to read as it did too much and had a lot of state to keep track of. It also looks like the staggered entry points were first copied and only later the parameters of the first stub were filled in. This means that only the BSP stub is actually jumping to the permanent smihandler. On the APs the stub would jump to wherever c_handler happens to point to, which is likely 0. This effectively means that on APs it's likely easy to have arbitrary code execution in SMM which is a security problem. Change-Id: I42ef9d6a30f3039f25e2cde975086a1365ca4182 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/63478 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Martin L Roth <gaumless@tutanota.com>
coreboot is a Free Software project aimed at replacing the proprietary BIOS (firmware) found in most computers. coreboot performs a little bit of hardware initialization and then executes additional boot logic, called a payload.
With the separation of hardware initialization and later boot logic, coreboot can scale from specialized applications that run directly firmware, run operating systems in flash, load custom bootloaders, or implement firmware standards, like PC BIOS services or UEFI. This allows for systems to only include the features necessary in the target application, reducing the amount of code and flash space required.
coreboot was formerly known as LinuxBIOS.
After the basic initialization of the hardware has been performed, any desired "payload" can be started by coreboot.
See https://www.coreboot.org/Payloads for a list of supported payloads.
coreboot supports a wide range of chipsets, devices, and mainboards.
For details please consult:
ANY_TOOLCHAIN Kconfig option if you're feeling lucky (no support in this case).Optional:
make menuconfig and make nconfig)Please consult https://www.coreboot.org/Build_HOWTO for details.
If you want to test coreboot without any risks before you really decide to use it on your hardware, you can use the QEMU system emulator to run coreboot virtually in QEMU.
Please see https://www.coreboot.org/QEMU for details.
Further details on the project, a FAQ, many HOWTOs, news, development guidelines and more can be found on the coreboot website:
You can contact us directly on the coreboot mailing list:
https://www.coreboot.org/Mailinglist
The copyright on coreboot is owned by quite a large number of individual developers and companies. Please check the individual source files for details.
coreboot is licensed under the terms of the GNU General Public License (GPL). Some files are licensed under the "GPL (version 2, or any later version)", and some files are licensed under the "GPL, version 2". For some parts, which were derived from other projects, other (GPL-compatible) licenses may apply. Please check the individual source files for details.
This makes the resulting coreboot images licensed under the GPL, version 2.