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[BUG] User mode trip breaks kernel mode flags #103

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wipawel opened this issue Oct 1, 2020 · 0 comments
Closed

[BUG] User mode trip breaks kernel mode flags #103

wipawel opened this issue Oct 1, 2020 · 0 comments
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@82marbag
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bug Something isn't working
Milestone
v0.3.1

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@wipawel
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wipawel commented Oct 1, 2020

Describe the bug
After return to kernel mode from user mode certain CPU flags are clobbered.

To Reproduce
Steps to reproduce the behavior:

  1. sti()
  2. call into user mode
  3. IF cleared

Expected behavior
Kernel mode CPU flags are preserved across user mode trip.
@wipawel wipawel added the bug Something isn't working label Oct 1, 2020
@wipawel wipawel added this to the v0.3 milestone Oct 1, 2020
82marbag added a commit to 82marbag/ktf that referenced this issue Oct 3, 2020
@82marbag
KernelTestFramework#103 ret2kern restores flags correctly
68ea9bc
@82marbag 82marbag mentioned this issue Oct 3, 2020
Merged
82marbag added a commit to 82marbag/ktf that referenced this issue Oct 3, 2020
@82marbag
KernelTestFramework#103 ret2kern restores flags correctly
4721bb8
82marbag added a commit to 82marbag/ktf that referenced this issue Oct 3, 2020
@82marbag
KernelTestFramework#103 ret2kern restores flags correctly
f662625 
Signed-off-by: Daniele Ahmed <ahmeddan amazon ,com>
82marbag added a commit to 82marbag/ktf that referenced this issue Oct 3, 2020
@82marbag
KernelTestFramework#103 ret2kern restores flags correctly
2e3b17e 
Signed-off-by: Daniele Ahmed <ahmeddan amazon ,com>
82marbag added a commit to 82marbag/ktf that referenced this issue Oct 3, 2020
@82marbag
KernelTestFramework#103 ret2kern restores flags correctly
d1c3c2b 
Signed-off-by: Daniele Ahmed <ahmeddan amazon ,com>
wipawel pushed a commit that referenced this issue Oct 3, 2020
@82marbag @wipawel
#103 ret2kern restores flags correctly
d0f08ee 
Signed-off-by: Daniele Ahmed <ahmeddan amazon ,com>
@wipawel wipawel closed this as completed Oct 3, 2020
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@wipawel @82marbag