qemu crash when deep sleeping

[floitsch_toit]

Is the ESP32 Qemu build supposed to be able to simulate a deep sleep?

When I call 'esp_sleep_start' I get the following crash:

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Guru Meditation Error: Core  0 panic'ed (LoadStorePIFAddrError). Exception was unhandled.

Core  0 register dump:
PC      : 0x40097560  PS      : 0x00060a33  A0      : 0x80088c1f  A1      : 0x3ffbbe50  
A2      : 0x3d8822e0  A3      : 0x00000000  A4      : 0x3f40a91d  A5      : 0x3ff48080  
A6      : 0x00000000  A7      : 0x3ff5d054  A8      : 0x80097558  A9      : 0x3ffbbdc0  
A10     : 0x00000005  A11     : 0x00000005  A12     : 0x00000004  A13     : 0x00000000  
A14     : 0x00000000  A15     : 0xfffffff7  SAR     : 0x0000000c  EXCCAUSE: 0x0000000f  
EXCVADDR: 0x3ff5d054  LBEG    : 0x40089b31  LEND    : 0x40089b39  LCOUNT  : 0x00000028  


Backtrace: 0x4009755d:0x3ffbbe50 0x40088c1c:0x3ffbbe90 0x40088e59:0x3ffbbee0 0x400f5789:0x3ffbbf00 0x40135d03:0x3ffbbf40 0x401c1f41:0x3ffbbf60

The stacktrace is decoded to:

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0x40097410: rtc_sleep_init + 0x18c
0x40088bb0: esp_sleep_start + 0x174
0x40088ded: esp_deep_sleep_start + 0x51
...

I tracked it down to the following call in 'rtc_sleep_pd':

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    REG_SET_FIELD(BBPD_CTRL, BB_FFT_FORCE_PU, ~cfg.bb_pd);