2b6a8dd52c
The documentation on the Saved Process Status Register (SPSR) is a bit weird; the M[4] bit is documented separately from M[3:0]. The M[4] bit can be toggled to switch to 32-bit execution mode. This functionality is orthogonal to M[3:0]. Change the definition of PSR_M_MASK to no longer include M[4]. Add a new definition, PSR_AARCH32 that can be used to toggle 32-bit independently. This bit will be used by the cloudabi32 code to force execution of userspace code in 32-bit mode. Reviewed by: andrew Differential Revision: https://reviews.freebsd.org/D13148
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