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From: Bill Morgan <arthurwilliammorgan@gmail.com>
Date: Fri, 26 Oct 2018 22:41:00 -0000
Message-ID: <CAM4wpo8KAB4ff0F9+XwWkRyT_3uT6NPUQThbuM9z0fSxW8CyWw@mail.gmail.com>
Subject: win32-arm-low.c regptr 96 bits stored in 32 bit variable
To: gdb@sourceware.org
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Should this static variable ULONG zero be at least 96 bits?

static char *
regptr (CONTEXT* c, int r)
{
  if (mappings[r] < 0)
  {
    static ULONG zero;
    /* Always force value to zero, in case the user tried to write
       to this register before.  */
    zero = 0;
    return (char *) &zero;
  }
  else
    return (char *) c + mappings[r];
}

reg-arm.dat shows 96 bits for the ones that have mappings[r] == -1

name:arm
xmlarch:arm
expedite:r11,sp,pc
32:r0
32:r1
32:r2
32:r3
32:r4
32:r5
32:r6
32:r7
32:r8
32:r9
32:r10
32:r11
32:r12
32:sp
32:lr
32:pc
96:f0
96:f1
96:f2
96:f3
96:f4
96:f5
96:f6
96:f7
32:fps
32:cpsr