| Age | Commit message (Collapse) | Author | |
|---|---|---|---|
| 2022-05-16 | arch/x86/null_breakpoint: Remove handler before jumping to payload | Arthur Heymans | |
| If a payload did any NULL dereferencing it would be broken and jump back to coreboot code. This fixes the SeaBIOS, FILO and possibly other payloads too. Fixes: 3f01cd14533f ("arch/x86: Add support for catching null dereferences through debug regs") TESTED on qemu/i440fx. Change-Id: I80f69b71f4d0fab3126e4b9f8c8dc7737b372174 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/64345 Reviewed-by: Robert Zieba <robertzieba@google.com> Reviewed-by: Stefan Ott <coreboot@desire.ch> Reviewed-by: Paul Menzel <paulepanter@mailbox.org> Reviewed-by: Raul Rangel <rrangel@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> | |||
| 2022-05-12 | arch/x86: Add support for catching null dereferences through debug regs | Robert Zieba | |
| This commit adds support for catching null dereferences and execution through x86's debug registers. This is particularly useful when running 32-bit coreboot as paging is not enabled to catch these through page faults. This commit adds three new configs to support this feature: DEBUG_HW_BREAKPOINTS, DEBUG_NULL_DEREF_BREAKPOINTS and DEBUG_NULL_DEREF_HALT. BUG=b:223902046 TEST=Ran on nipperkin device, verifying that HW breakpoints work as expected. Change-Id: I113590689046a13c2a552741bbfe7668a834354a Signed-off-by: Robert Zieba <robertzieba@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/63657 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Raul Rangel <rrangel@chromium.org> | |||
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