Re: firefox aarch64 pledge crashes

In addition to what sthen posted, I ran into these, the first one smells
like a noexeconly issue. Not sure about the second one (I modified kdump
to print the trap as hexadecimal since I got tired of translating
decimal to hex)

67550 firefox PSIG SIGSEGV caught handler=0x2027faaeb8 mask=0<> code=SEGV_ACCERR addr=0x202217bc26 trapno=0x9200000f

$ aarch64-esr-decoder 0x9200000f
ESR 0x0000000000000000000000009200000f:
37..63 RES0: 0x0000000 0b000000000000000000000000000
32..36 ISS2: 0x00 0b00000
26..31 EC: 0x24 0b100100
# Data Abort from a lower Exception level
25 IL: true
# 32-bit instruction trapped
00..24 ISS: 0x000000f 0b0000000000000000000001111
24 ISV: false
# No valid instruction syndrome
14..23 RES0: 0x000 0b0000000000
13 VNCR: false
11..12 RES0: 0x0 0b00
10 FnV: false
# FAR is valid
09 EA: false
08 CM: false
07 S1PTW: false
06 WnR: false
# Abort caused by reading from memory
00..05 DFSC: 0x0f 0b001111
# Permission fault, level 3.

67550 firefox PSIG SIGSEGV caught handler=0x2027faaeb8 mask=0<> code=SEGV_MAPERR addr=0x0 trapno=0x82000005

$ aarch64-esr-decoder 0x82000005
ESR 0x00000000000000000000000082000005:
37..63 RES0: 0x0000000 0b000000000000000000000000000
32..36 ISS2: 0x00 0b00000
26..31 EC: 0x20 0b100000
# Instruction Abort from a lower Exception level
25 IL: true
# 32-bit instruction trapped
00..24 ISS: 0x0000005 0b0000000000000000000000101
13..24 RES0: 0x000 0b000000000000
11..12 RES0: 0x0 0b00
10 FnV: false
# FAR is valid
09 EA: false
08 RES0: false
07 S1PTW: false
06 RES0: false
00..05 IFSC: 0x05 0b000101
# Translation fault, level 1.