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8689c6efef
Commit 01f728857941 ("target-mips: Status.UX/SX/KX enable 32-bit address
wrapping") added a new hflag MIPS_HFLAG_AWRAP, which indicates that
64-bit addressing is disallowed in the current mode, so hflag users
don't need to worry about the complexities of working that out, for
example checking both MIPS_HFLAG_KSU and MIPS_HFLAG_UX.
However when exceptions are taken outside of exception level,
mips_cpu_do_interrupt() manipulates the env->hflags directly rather than
using compute_hflags() to update them, and this code wasn't updated
accordingly. As a result, when UX is cleared, MIPS_HFLAG_AWRAP is set,
but it doesn't get cleared on entry back into kernel mode due to an
exception. Kernel mode then cannot access the 64-bit segments resulting
in a nested exception loop. The same applies to errors and debug
exceptions.
Fix by updating mips_cpu_do_interrupt() to clear the MIPS_HFLAG_WRAP
flag when necessary, according to compute_hflags().
Backports commit 7871abb94c2f4adc39f2487f6edf5e69ba872a65 from qemu
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| .. | ||
| cpu-qom.h | ||
| cpu.c | ||
| cpu.h | ||
| dsp_helper.c | ||
| helper.c | ||
| helper.h | ||
| lmi_helper.c | ||
| Makefile.objs | ||
| mips-defs.h | ||
| msa_helper.c | ||
| op_helper.c | ||
| TODO | ||
| translate.c | ||
| translate_init.c | ||
| unicorn.c | ||
| unicorn.h | ||