Messages in this thread | | | From | Brian Gerst <> | Subject | [PATCH v2 0/6] x86: Clean up fast syscall return validation | Date | Fri, 21 Jul 2023 12:10:11 -0400 |
| |
This patch set cleans up the tests done to determine if a fast syscall return instruction can be used to return to userspace. It converts the code to C, and refactors existing code to be more readable.
v2: - Fix shift value for canonical RIP test and use __is_canonical_address()
Brian Gerst (6): x86/entry/64: Remove obsolete comment on tracing vs. SYSRET x86/entry/64: Convert SYSRET validation tests to C x86/entry/compat: Combine return value test from syscall handler x86/entry/32: Convert do_fast_syscall_32() to bool return type x86/entry/32: Remove SEP test for SYSEXIT x86/entry/32: Clean up syscall fast exit tests
arch/x86/entry/common.c | 99 +++++++++++++++++++++----------- arch/x86/entry/entry_32.S | 2 +- arch/x86/entry/entry_64.S | 68 +--------------------- arch/x86/entry/entry_64_compat.S | 12 ++-- arch/x86/include/asm/syscall.h | 6 +- 5 files changed, 77 insertions(+), 110 deletions(-)
-- 2.41.0
| |