[v1] x86: Clean up fast syscall return validation

[PATCH 0/6] x86: Clean up fast syscall return validation

Brian Gerst posted 6 patches 2 years, 1 month ago

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arch/x86/entry/common.c          | 109 +++++++++++++++++++++----------
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, 87 insertions(+), 110 deletions(-)

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[PATCH 0/6] x86: Clean up fast syscall return validation

Posted by Brian Gerst 2 years, 1 month ago

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.

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          | 109 +++++++++++++++++++++----------
 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, 87 insertions(+), 110 deletions(-)

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2.41.0