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[Qemu-devel] [Bug 1756927] Re: ARMv7 LPAE: IFSR doesn't have the LPAE bi


From: Peter Maydell
Subject: [Qemu-devel] [Bug 1756927] Re: ARMv7 LPAE: IFSR doesn't have the LPAE bit in case of BKPT
Date: Tue, 20 Mar 2018 14:04:19 -0000

** Tags added: arm

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https://bugs.launchpad.net/bugs/1756927

Title:
  ARMv7 LPAE: IFSR doesn't have the LPAE bit in case of BKPT

Status in QEMU:
  In Progress

Bug description:
  When a user application triggers a 'bkpt' instruction while LPAE is
  used, the bit [9] of IFSR is not correctly set during the prefetch
  abort exception.

  You'll find attached a minimal example to reproduce the issue (just run 'make 
all').
  The output I get is:

  supervisor
  user
  prefetch
  short-descriptor

  The last entry should read 'long-descriptor'.

  
  Qemu revision: 48ae1f60d8c9a770e6da64407984d84e25253c69
  Ubuntu verison: 16.04 LTS
  Cross Compiler: gcc linaro 6.3.1-2017.02-x86_64_arm-eabi

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