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+
+[ARMv5] Integrator/CP regression when reading FPSID register
+
+There seems to be a regression in QEMU 2.1.0 which demonstrates itself
+when running the attached HelenOS Integrator/CP (i.e. ARMv5) image. The
+offending instruction seems to be:
+
+  vmrs r0, fpsid
+
+Upon its execution, HelenOS kernel receives an Undefined instruction
+exception (which it does not anticipate at that point) and crashes.
+
+QEMU 2.0.0 was not affected by this issue.
+
+Command line to reproduce with QEMU 2.1.0:
+
+$ qemu-system-arm -M integratorcp -kernel image.boot -s -S &
+$ /usr/local/cross/arm32/bin/arm-linux-gnueabi-gdb 
+...
+(gdb) target remote localhost:1234
+Remote debugging using localhost:1234
+warning: Can not parse XML target description; XML support was disabled at compile time
+0x00000000 in ?? ()
+(gdb) symbol-file kernel/kernel.raw
+Reading symbols from /home/jermar/software/HelenOS.mainline/kernel/kernel.raw...done.
+(gdb) break ras_check
+Breakpoint 1 at 0x80a021bc: file arch/arm32/src/ras.c, line 67.
+(gdb) c
+Continuing.
+
+Breakpoint 1, ras_check (n=1, istate=0x813e7f70) at arch/arm32/src/ras.c:67
+67	{
+(gdb) set radix 16
+Input and output radices now set to decimal 16, hex 10, octal 20.
+(gdb) print istate->pc
+$1 = 0x80a02458
+(gdb) disassemble 0x80a02458
+Dump of assembler code for function fpsid_read:
+   0x80a02454 <+0>:	vmrs	r0, fpsid                           <======= UNDEFINED EXCEPTION INSTRUCTION
+   0x80a02458 <+4>:	mov	pc, lr
+End of assembler dump.
+
+
+The Undefined instruction exception is not expected at this point when executing the VMRS r0,fpsid instruction.
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