3f18b1bf59
The definition of isa_mode hardcodes the values to shift PSR_J_BIT and PSR_T_BIT to move them to bits 1 and 0 respectively. Instead use __ffs to calculate the shift from the #define already used for masking. This is relevant on v7-M as there PSR_T_BIT is 0x01000000 instead of 0x00000020 for V7-[AR] and earlier. Because of that isa_mode produced values >= 0x80000 which are unsuitable to index into isa_modes[4] there and so made __show_regs read from undefined memory which resulted in hangs and crashes. Moreover isa_mode is wrong for v7-M even after this robustness fix as there is no J-bit in the PSR register. So hardcode isa_mode to "Thumb" for v7-M. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> |
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| asm | ||
| debug | ||
| uapi/asm | ||