[Bug 1711337] Re: Firefox crashes at start on armv7L after 55.0.1 update

[Chituc Georgian]

It successfully build a deb .I build all with gcc except gfx/skia build with clang .
There is again a crash but It looks now is not in _sk_xor__vfp4 the asm code where it crash is different from the asm code of _sk_xor__vfp4  .

firefox -g
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Reading symbols from /usr/lib/firefox/firefox...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/lib/firefox/firefox 
Cannot parse expression `.L1185 4 at r4'.
warning: Probes-based dynamic linker interface failed.
Reverting to original interface.

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
[New Thread 0xf2522450 (LWP 2431)]
[New Thread 0xf1d22450 (LWP 2432)]
[Thread 0xf1d22450 (LWP 2432) exited]
[New Thread 0xf1d22450 (LWP 2433)]
[New Thread 0xed17b450 (LWP 2434)]
[New Thread 0xec97b450 (LWP 2435)]
[New Thread 0xec17b450 (LWP 2436)]
[New Thread 0xf12ff450 (LWP 2437)]
[New Thread 0xf10ff450 (LWP 2438)]
[New Thread 0xeb97b450 (LWP 2439)]
[New Thread 0xeb77b450 (LWP 2440)]
[New Thread 0xeb57b450 (LWP 2441)]
[New Thread 0xeb37b450 (LWP 2442)]
[New Thread 0xeb17b450 (LWP 2443)]
Thread 1 "firefox" received signal SIGSEGV, Segmentation fault.
0xf4c3dcb4 in ?? () from /usr/lib/firefox/libxul.so
(gdb) disas /r 0xf4c3dca0,0xf4c3dcd0
Dump of assembler code from 0xf4c3dca0 to 0xf4c3dcd0:
   0xf4c3dca0:	9b 68	ldr	r3, [r3, #8]
   0xf4c3dca2:	05 eb 83 03	add.w	r3, r5, r3, lsl #2
   0xf4c3dca6:	16 46	mov	r6, r2
   0xf4c3dca8:	0f 46	mov	r7, r1
   0xf4c3dcaa:	98 44	add	r8, r3
   0xf4c3dcac:	20 99	ldr	r1, [sp, #128]	; 0x80
   0xf4c3dcae:	d9 e9 00 23	ldrd	r2, r3, [r9]
   0xf4c3dcb2:	82 46	mov	r10, r0
=> 0xf4c3dcb4:	c1 e9 00 23	strd	r2, r3, [r1]
   0xf4c3dcb8:	d9 f8 04 30	ldr.w	r3, [r9, #4]
   0xf4c3dcbc:	7b 33	adds	r3, #123	; 0x7b
   0xf4c3dcbe:	00 f0 4b 81	beq.w	0xf4c3df58
   0xf4c3dcc2:	b1 69	ldr	r1, [r6, #24]
   0xf4c3dcc4:	c1 f3 56 25	ubfx	r5, r1, #9, #23
   0xf4c3dcc8:	21 f4 ff 71	bic.w	r1, r1, #510	; 0x1fe
   0xf4c3dccc:	21 f0 01 01	bic.w	r1, r1, #1


I dnt know where this asm code belongs too . I dnt know in what function
it crash , but is not in sk jumper generated .

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Title:
  Firefox crashes at start on armv7L after 55.0.1 update

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