Fix has been included here:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=ba3c35d9c4026361fd3
** Changed in: qemu
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/757702
Title:
ARM: singlestepping insn which UNDEFs should stop at UNDEF vector
insn, not after it
Status in QEMU:
Fix Released
Bug description:
ARMv7a has lot of undefined instruction from its instruction opcode
space. This undefined instructions are very useful for replacing
sensitive non-priviledged instructions of guest operating systems
(virtualization). The undefined instruction exception executes at
<exception_base> + 0x4, where <exception_base> can be 0x0 or
0xfff00000. Currently, in qemu 0.14.0 undefined instruction fault at
0x8 offset instead of 0x4. This was not a problem with qemu 0.13.0,
seems like this is a new bug. As as example, if we try to execute
value "0xec019800" in qemu 0.14.0 then it should cause undefined
exception at <exception_base>+0x4 since "0xec019800" is an undefined
instruction.
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