Re: Firefox crashes all the time on the RaspBerry Pi Zero 2W

This is unlikely to be your problem, but here's what the workaround does:

gcc -O2

  -mno-fix-cortex-a53-835769

foo(unsigned int volatile*, unsigned long):
         sub     sp, sp, #16
         str     wzr, [sp, 12]
         ldr     w2, [sp, 12]
         cmp     x1, x2, sxtw
         bls     .L4
         adrp    x5, .LANCHOR0
         add     x5, x5, :lo12:.LANCHOR0
         mov     x4, x0
         mov     w6, 1713
         mov     x0, 0
.L3:
         ldr     w2, [sp, 12]
         sxtw    x2, w2
         str     x2, [x5]
         ldr     w2, [sp, 12]
         sxtw    x2, w2
         ldr     w3, [x4, x2, lsl 2]
         ldr     w2, [sp, 12]
         add     w2, w2, 1
         str     w2, [sp, 12]
         umaddl  x0, w3, w6, x0
         ldr     w2, [sp, 12]
         cmp     x1, x2, sxtw
         bhi     .L3
         add     sp, sp, 16
         ret
.L4:
         mov     x0, 0
         add     sp, sp, 16
         ret
         .set    .LANCHOR0,. + 0
p:
         .zero   8




foo(unsigned int volatile*, unsigned long):
         sub     sp, sp, #16w6
         str     wzr, [sp, 12]
         ldr     w2, [sp, 12]
         cmp     x1, x2, sxtw
         bls     .L4
         adrp    x5, .LANCHOR0
         add     x5, x5, :lo12:.LANCHOR0
         mov     x4, x0
         mov     w6, 1713
         mov     x0, 0
.L3:
         ldr     w2, [sp, 12]
         sxtw    x2, w2
         str     x2, [x5]
         ldr     w2, [sp, 12]
         sxtw    x2, w2
         ldr     w3, [x4, x2, lsl 2]
         ldr     w2, [sp, 12]
         add     w2, w2, 1
         str     w2, [sp, 12]
         nop // between mem op and mult-accumulate
         umaddl  x0, w3, w6, x0
         ldr     w2, [sp, 12]
         cmp     x1, x2, sxtw
         bhi     .L3
         add     sp, sp, 16
         ret
.L4:
         mov     x0, 0
         add     sp, sp, 16
         ret
         .set    .LANCHOR0,. + 0
p:
         .zero   8