Date: Thu, 22 Oct 2015 14:14:07 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Mattia Rossi <mattia.rossi.mailinglists@gmail.com> Cc: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: CC core dumping with CLANG 3.7 on armv5 - DREAMPLUG Message-ID: <20151022111407.GD2257@kib.kiev.ua> In-Reply-To: <5628B0B0.8040804@gmail.com> References: <5626144F.9060003@gmail.com> <5628873F.7050509@gmail.com> <20151022081551.GB2257@kib.kiev.ua> <5628B0B0.8040804@gmail.com>
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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) 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) > > Doesn't tell me anything :-( > > > > > Is ARMv5 considered active platform for clang anyway ? > > In http://www.llvm.org/svn/llvm-project/llvm/trunk/lib/Target/ARM/ARM.td > I found this: > > def HasV5TOps : SubtargetFeature<"v5t", "HasV5TOps", "true", > "Support ARM v5T instructions", > [HasV4TOps]>; > > > Which to me means that it still supports armv5 ...
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