Date: Thu, 22 Oct 2015 14:40:56 +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: <5628D958.4060904@gmail.com> In-Reply-To: <20151022111407.GD2257@kib.kiev.ua> References: <5626144F.9060003@gmail.com> <5628873F.7050509@gmail.com> <20151022081551.GB2257@kib.kiev.ua> <5628B0B0.8040804@gmail.com> <20151022111407.GD2257@kib.kiev.ua>
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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
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