| commit | 26c7e964f6a833dbc90ca58e29fc63bccecc0b55 | |
| author | Matthew Dillon <dillon@apollo.backplane.com> | |
| Thu, 11 Jan 2018 20:48:18 +0000 (11 12:48 -0800) | ||
| committer | Matthew Dillon <dillon@apollo.backplane.com> | |
| Thu, 11 Jan 2018 20:51:25 +0000 (11 12:51 -0800) | ||
| tree | 77867ee70475f8ba65bd7553c9a5dce6fb357dc6 | treesnapshot (tar.gz zip) |
| parent | e239b8303ccf1f7cdd718c9e94cc6c4d8a1d62f5 | commitdiff |
kernel - Implement spectre mitigations part 3 (stabilization)
* Fix a bug in the system call entry code. The wrong stack pointer
was being loaded for KMMUENTRY_SYSCALL and KMMUENTRY_SYSCALL was
using an offset that did not exist in certain situations.
* Load the correct stack pointer, but also change KMMUENTRY_CORE
to not use stack-relative loads and stores. Instead it uses
the trampframe directly via %gs:BLAH
Reported-by: zrj
* Fix a bug in the system call entry code. The wrong stack pointer
was being loaded for KMMUENTRY_SYSCALL and KMMUENTRY_SYSCALL was
using an offset that did not exist in certain situations.
* Load the correct stack pointer, but also change KMMUENTRY_CORE
to not use stack-relative loads and stores. Instead it uses
the trampframe directly via %gs:BLAH
Reported-by: zrj
| sys/cpu/x86_64/include/asmacros.h | diffblobblamehistory | |
| sys/platform/pc64/x86_64/exception.S | diffblobblamehistory |