[Bug 1620754] Re: python-cryptography ftbfs for 3.5 on armhf with a bus error

[James Page]

Dump of assembler code for function siphash24:
   0x000d40a0 <+0>:	stmdb	sp!, {r4, r5, r6, r7, r8, r9, r10, r11, lr}
   0x000d40a4 <+4>:	movw	r3, #64168	; 0xfaa8
   0x000d40a8 <+8>:	sub	sp, #156	; 0x9c
   0x000d40aa <+10>:	movt	r3, #48	; 0x30
   0x000d40ae <+14>:	movw	r4, #3232	; 0xca0
   0x000d40b2 <+18>:	movt	r4, #51	; 0x33
   0x000d40b6 <+22>:	mov	lr, r1
   0x000d40b8 <+24>:	str	r3, [sp, #124]	; 0x7c
   0x000d40ba <+26>:	ldrd	r10, r11, [r4]
   0x000d40be <+30>:	cmp.w	lr, #7
   0x000d40c2 <+34>:	ldr	r1, [r3, #0]
   0x000d40c4 <+36>:	mov.w	r3, lr, lsl #24
   0x000d40c8 <+40>:	str	r3, [sp, #116]	; 0x74
   0x000d40ca <+42>:	addw	r3, pc, #1564	; 0x61c
   0x000d40ce <+46>:	ldrd	r2, r3, [r3]
   0x000d40d2 <+50>:	ldrd	r8, r9, [r4, #8]
   0x000d40d6 <+54>:	eor.w	r5, r11, r3
   0x000d40da <+58>:	eor.w	r4, r10, r2
   0x000d40de <+62>:	addw	r7, pc, #1552	; 0x610
   0x000d40e2 <+66>:	ldrd	r6, r7, [r7]
   0x000d40e6 <+70>:	mov.w	r3, #0
   0x000d40ea <+74>:	strd	r4, r5, [sp]
   0x000d40ee <+78>:	str	r3, [sp, #112]	; 0x70
   0x000d40f0 <+80>:	eor.w	r6, r6, r10
   0x000d40f4 <+84>:	addw	r5, pc, #1536	; 0x600
   0x000d40f8 <+88>:	ldrd	r4, r5, [r5]
   0x000d40fc <+92>:	eor.w	r7, r7, r11
   0x000d4100 <+96>:	addw	r3, pc, #1532	; 0x5fc
   0x000d4104 <+100>:	ldrd	r2, r3, [r3]
   0x000d4108 <+104>:	str	r0, [sp, #128]	; 0x80
   0x000d410a <+106>:	eor.w	r4, r4, r8
   0x000d410e <+110>:	str	r1, [sp, #148]	; 0x94
   0x000d4110 <+112>:	eor.w	r5, r5, r9
   0x000d4114 <+116>:	eor.w	r2, r2, r8
   0x000d4118 <+120>:	eor.w	r3, r3, r9
   0x000d411c <+124>:	ble.w	0xd42be <siphash24+542>
   0x000d4120 <+128>:	sub.w	r1, lr, #8
   0x000d4124 <+132>:	str	r1, [sp, #120]	; 0x78
   0x000d4126 <+134>:	mov	r12, r0
   0x000d4128 <+136>:	lsrs	r1, r1, #3
   0x000d412a <+138>:	str	r1, [sp, #132]	; 0x84
   0x000d412c <+140>:	add.w	r10, r1, #1
   0x000d4130 <+144>:	add.w	r10, r0, r10, lsl #3
   0x000d4134 <+148>:	str.w	r10, [sp, #108]	; 0x6c
=> 0x000d4138 <+152>:	ldrd	r10, r11, [r12], #8

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Title:
  python-cryptography ftbfs for 3.5 on armhf with a bus error

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