root@debian-armel:/tmp/squashfs-root/usr/bin# ./my_arm_bin
Illegal instruction

Warning: Cannot initialize dynamic strings
arch     arm
binsz    44831825
bintype  elf
bits     32
canary   false
class    ELF32
crypto   false
endian   little
havecode true
lang     c
linenum  false
lsyms    false
machine  ARM
maxopsz  16
minopsz  1
nx       false
os       linux
pcalign  0
pic      false
relocs   false
rpath    NONE
static   true
stripped true
subsys   linux
va       true

gef> x/20i $pc
=> 0x796a0: mov r11, #0
   0x796a4: mov lr, #0
   0x796a8: pop {r1}        ; (ldr r1, [sp], #4)
   0x796ac: mov r2, sp
   0x796b0: push    {r2}        ; (str r2, [sp, #-4]!)
   0x796b4: push    {r0}        ; (str r0, [sp, #-4]!)
   0x796b8: ldr r12, [pc, #16]  ; 0x796d0
   0x796bc: push    {r12}       ; (str r12, [sp, #-4]!)
   0x796c0: ldr r0, [pc, #12]   ; 0x796d4
   0x796c4: ldr r3, [pc, #12]   ; 0x796d8
   0x796c8: bl  0x4021a0
   0x796cc: bl  0x401fa0
   0x796d0: andeq   r2, r12, #200, 2    ; 0x32
   0x796d4: andeq   r10, r1, r12, lsl #11
   0x796d8: andeq   r2, r12, #40, 2
   0x796dc: ldr r3, [pc, #20]   ; 0x796f8
   0x796e0: ldr r2, [pc, #20]   ; 0x796fc
   0x796e4: add r3, pc, r3
   0x796e8: ldr r2, [r3, r2]
   0x796ec: cmp r2, #0
gef>

->   0x796c8                  bl     0x4021a0
   ->    0x4021a0                  ldr    pc,  [pc,  #-4]  ; 0x4021a4

gef> x/20i $pc
=> 0x20c1b30:   push    {r4, r5, r6, r7, lr}
   0x20c1b34:   sub sp, sp, #300    ; 0x12c
   0x20c1b38:   movw    r12, #0
   0x20c1b3c:   mov r5, r3                          --> Here is our illegal instruction
   0x20c1b40:   movt    r12, #0
   0x20c1b44:   str r1, [sp, #4]
   0x20c1b48:   movw    r1, #65336  ; 0xff38
   0x20c1b4c:   cmp r12, #0
   0x20c1b50:   ldr r3, [sp, #4]
   0x20c1b54:   str r2, [sp, #8]
   0x20c1b58:   ldrne   r12, [r12]
   0x20c1b5c:   add r2, r3, #1
   0x20c1b60:   str r0, [sp, #12]
   0x20c1b64:   movw    r3, #56376  ; 0xdc38
   0x20c1b68:   ldr r7, [sp, #8]
   0x20c1b6c:   movw    r0, #3092   ; 0xc14
   0x20c1b70:   ldr lr, [sp, #328]  ; 0x148
   0x20c1b74:   clzne   r12, r12
   0x20c1b78:   movt    r0, #685    ; 0x2ad
   0x20c1b7c:   movt    r1, #827    ; 0x33b