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abf1172fc6
For AArch32 exceptions, the only information provided about the cause of an exception is the individual exception type (data abort, undef, etc), which we store in cs->exception_index. For AArch64, the CPU provides much more detail about the cause of the exception, which can be found in the syndrome register. Create a set of fields in CPUARMState which must be filled in whenever an exception is raised, so that exception entry can correctly fill in the syndrome register for the guest. This includes the information which in AArch32 appears in the DFAR and IFAR (fault address registers) and the DFSR and IFSR (fault status registers) for data aborts and prefetch aborts, since if we end up taking the MMU fault to AArch64 rather than AArch32 this will need to end up in different system registers. This patch does a refactoring which moves the setting of the AArch32 DFAR/DFSR/IFAR/IFSR from the point where the exception is raised to the point where it is taken. (This is no change for cores with an MMU, retains the existing clearly incorrect behaviour for ARM946 of trashing the MP access permissions registers which share the c5_data and c5_insn state fields, and has no effect for v7M because we don't implement its MPU fault status or address registers.) As a side effect of the cleanup we fix a bug in the AArch64 linux-user mode code where we were passing a 64 bit fault address through the 32 bit c6_data/c6_insn fields: it now goes via the always-64-bit exception.vaddress. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> |
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| .. | ||
| aarch64 | ||
| alpha | ||
| arm | ||
| cris | ||
| i386 | ||
| m68k | ||
| microblaze | ||
| mips | ||
| mips64 | ||
| openrisc | ||
| ppc | ||
| s390x | ||
| sh4 | ||
| sparc | ||
| sparc64 | ||
| unicore32 | ||
| x86_64 | ||
| cpu-uname.c | ||
| cpu-uname.h | ||
| elfload.c | ||
| errno_defs.h | ||
| flat.h | ||
| flatload.c | ||
| ioctls.h | ||
| linux_loop.h | ||
| linuxload.c | ||
| m68k-sim.c | ||
| main.c | ||
| Makefile.objs | ||
| mmap.c | ||
| qemu.h | ||
| signal.c | ||
| socket.h | ||
| strace.c | ||
| strace.list | ||
| syscall_defs.h | ||
| syscall_types.h | ||
| syscall.c | ||
| target_flat.h | ||
| uaccess.c | ||
| vm86.c | ||