Date: Thu, 22 Oct 2015 14:43:36 +0200 From: Mattia Rossi <mattia.rossi.mailinglists@gmail.com> To: Konstantin Belousov <kostikbel@gmail.com> Cc: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: CC core dumping with CLANG 3.7 on armv5 - DREAMPLUG Message-ID: <5628D9F8.8040206@gmail.com> In-Reply-To: <5628D958.4060904@gmail.com> References: <5626144F.9060003@gmail.com> <5628873F.7050509@gmail.com> <20151022081551.GB2257@kib.kiev.ua> <5628B0B0.8040804@gmail.com> <20151022111407.GD2257@kib.kiev.ua> <5628D958.4060904@gmail.com>
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Am 22.10.2015 um 14:40 schrieb Mattia Rossi:
>
>
> Am 22.10.2015 um 13:14 schrieb Konstantin Belousov:
>> On Thu, Oct 22, 2015 at 11:47:28AM +0200, Mattia Rossi wrote:
>>>> You may disassemble the instruction at the address, and print the
>>>> content
>>>> of registers:
>>>> (gdb) disassemble *0x01eb0868-8,0x01eb0868+8
>>>> (gdb) info registers
>>>>
>>>> If the cause of your issue is weird codegeneration on ARMv5, it
>>>> might be
>>>> seen from the data above. On the other hand, this would not help
>>>> if the
>>>> issue is algorithmic. I am afraid there is not much more to suggest.
>>> (gdb) disassemble *0x01eb0868-8,0x01eb0868+8
>>> No function contains specified address.
>> Apparently correct syntax is
>> disassemble 0x01eb0868-8 0x01eb0868+8
> (gdb) bt
> #0 0x01eb0868 in ?? ()
> (gdb) disassemble 0x01eb0868-8 0x01eb0868+8
> Dump of assembler code from 0x1eb0860 to 0x1eb0870:
> 0x01eb0860: add r12, r12, #1 ; 0x1
> 0x01eb0864: and r7, r0, r3
> 0x01eb0868: ldr r1, [r10, r7, lsl #2]
> 0x01eb086c: cmp r1, #0 ; 0x0
> End of assembler dump.
> (gdb) info registers
> r0 0x1e53b 124219
> r1 0x6a 106
> r2 0xc3c3c3c6 -1010580538
> r3 0x5a5a5a59 1515870809
> r4 0x3 3
> r5 0x1fd9f83 33398659
> r6 0x1e53b 124219
> r7 0x4019 16409
> r8 0x22a1708c 581005452
> r9 0xffffffff -1
> r10 0x5a5a5a5a 1515870810
> r11 0xbfbfeb70 -1077941392
> r12 0x1 1
> sp 0xbfbfeb48 -1077941432
> lr 0x8f5c 36700
> pc 0x1eb0868 32180328
> fps 0x0 0
> cpsr 0x60000010 1610612752
> (gdb)
>
> Still I can't tell anything from that :-/ - way too low level for me
Btw. I'm currently using a helloworld program for testing:
root@dreamplug:~ # cat helloworld.c
/* Hello World program */
#include<stdio.h>
main()
{
printf("Hello World");
}
But the problem is independent of the input file
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