This is a snippet of segmented stack manipulation for ARM. This snippet contains stack related parts so you can generate unwind table as the same as full version. (other parts are just commented for understand)

gistfile1.c

/*
  This is a snippet of segmented stack manipulation for ARM.
  This snippet contains stack related parts so you can generate unwind table as the same as full version.
  (other parts are just commented for understand)
   
  Compiled with gas, llvm-objdump shows extab as follow
    Contents of section .ARM.extab:
    0000 00000000 84419b01 b0b0b083 409b0281  .....A......@...
    0010 84848496 b0b0a100 00000000           ............

    84119b01 0b0b0b83 for foo
    409b0281 84848496 b0b0a100 for __morestack
*/

	.text
	.align	2
	.global foo
	.type	foo,%function
foo:
	.fnstart
.LBB_FOO_STACKCHECK:

	push	{r4, r5}
	// some code here for calcuating stack required and stack limit
	//  r4 <- stack required
	//  r5 <- stack limit

	cmp	r4, r5
	blo	.LBB_FOO_STACKCHECK_END
	// need more stack
	push {lr}
	bl	__morestack
	pop {lr}
	pop	{r4, r5}
	// return from this function
	// function was already called from __morestack
	mov	pc, lr
.LBB_FOO_STACKCEHCK_END:
	// don't need more stack
	pop	{r4, r5}
.LBB_FOO_PROLOGUE:
	.save	{r4, r5, r11, lr}
	push	{r4, r5, r11, lr}
	.setfp	r11, sp, #8
	add	r11, sp, #8
	.pad	#20
	sub	sp, sp, #20
.LBB_FOO_BODY:
	// function body
	pop {r4, r5, r11, lr}
	mov pc, lr
	.globl	my_personality
	.personality my_personality
	.handlerdata
	.fnend



	.text
	.align	2
	.global __morestack
	.hidden __morestack
	.type __morestack, %function
__morestack:
	.fnstart
	// adjust unwind table
	.save {r4, r5}
	.save {lr}
	.save {r6, fp, lr}
	push {r6, fp, lr}
	.movsp r6
	mov r6, sp
	.setfp fp, sp, #4
	add fp, sp, #4
.LBB_MORESTACK_BODY:
    
	// some code are here
    	//  allocate new stack
    	//  change to new stack and run original function
    	//  return back to the original stack

	pop {r6, fp, lr}
	mov pc, lr
	.fnend