[Qemu-devel] [PATCH v3 00/11] implement dynamic endianness switching

[Paolo Bonzini]

This fixes the Raspberry Pi optimized memcmp library (with both user-mode
and system-mode emulation).

Compared to the previous submission, the main changes are:

- I track access endianness by taking into account both SCTLR.B and CPSR.E,
  to make the code easier to understand (though a little bit more
  convoluted)

- because of this, I prevent execution of BE32 executables with ARMv7 or v8
  CPUs.  These CPUs do not have SCTLR.B.

- because of this, I also included an untested patch to implement BE32
  mode in system emulation (BE8 should already work with the previous
  versions of the series).

Note that I also tested the rest only with BE32, since BE8 is not included
in linux-user-test-0.3 (it may be possible to convert BE32 to BE8 using
ld -r?  I haven't tried yet and I'm going to travel for the rest of the
weekend).

It is a bit late for 2.1, so I wouldn't complain if this is pushed out
to the next version.

Thanks,

Paolo

Paolo Bonzini (11):
  linux-user: arm: fix coding style for some linux-user signal functions
  linux-user: arm: pass env to get_user_code_*
  target-arm: implement SCTLR.B, drop bswap_code
  linux-user: arm: set CPSR.E correctly for BE8 mode
  linux-user: arm: handle CPSR.E correctly in strex emulation
  target-arm: implement SCTLR.EE
  target-arm: pass DisasContext to gen_aa32_ld*/st*
  target-arm: introduce tbflag for CPSR.E
  target-arm: implement setend
  target-arm: reorganize gen_aa32_ld/st to prepare for BE32 system emulation
  target-arm: implement BE32 mode in system emulation

 linux-user/arm/target_cpu.h |   2 +
 linux-user/main.c           |  81 ++++++--
 linux-user/signal.c         | 114 ++++++------
 target-arm/arm_ldst.h       |   8 +-
 target-arm/cpu.h            |  85 ++++++++-
 target-arm/helper.c         |  46 ++++-
 target-arm/helper.h         |   1 +
 target-arm/op_helper.c      |   5 +
 target-arm/translate-a64.c  |   6 +-
 target-arm/translate.c      | 444 +++++++++++++++++++++++++++-----------------
 target-arm/translate.h      |   4 +-
 11 files changed, 525 insertions(+), 271 deletions(-)

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1.9.3