[gem5-users] Re: Porting a configuration file from gem5 v20 to gem5 v21
Hi Giacomo,
In SE mode, the segmentation fault is triggered
at line 905 in build/ARM/cpu/o3/cpu.cc.
Following is the code that triggers the interrupt
and the code that is executed in the last two steps before the interrupt.
gef➤ up
#1 0x55dc2969 in gem5::o3::CPU::trap (this=0x5b7ca000,
fault=std::shared_ptr (use count 2, weak count 0) = {...},
tid=0x0, inst=...) at build/ARM/cpu/o3/cpu.cc:905
*905* fault->invoke(threadContexts[tid], inst);
*void*
*CPU::trap(const Fault , ThreadID tid, const StaticInstPtr )*
*{*
*// Pass the thread's TC into the invoke method.*
*fault->invoke(threadContexts[tid], inst); < line 905*
*}*
gef➤ up
#2 0x55dae664 in gem5::o3::Commit::commitHead
(this=0x5b7cd8a0, head_inst=..., inst_num=0x0) at
build/ARM/cpu/o3/commit.cc:1252
*1252* cpu->trap(inst_fault, tid,
* if (inst_fault != NoFault) {*
*……*
*…….*
……..
*assert(!thread[tid]->noSquashFromTC);*
*cpu->trap(inst_fault, tid, <- line 1252*
* head_inst->notAnInst() ? nullStaticInstPtr :*
* head_inst->staticInst);*
gef➤ up
#3 0x55dacbaf in gem5::o3::Commit::commitInsts
(this=0x5b7cd8a0) at build/ARM/cpu/o3/commit.cc:1020
*1020* bool commit_success = commitHead(head_inst,
num_committed);
*if (head_inst->isSquashed()) {*
*……*
*…….*
……..
*} else {*
*pc[tid] = head_inst->pcState();*
*// Try to commit the head instruction.*
*bool commit_success = commitHead(head_inst, num_committed);
< line 1020*
Ali
On Tue, Oct 12, 2021 at 5:01 PM Giacomo Travaglini <
giacomo.travagl...@arm.com> wrote:
>
> > -Original Message-
> > From: Ali Ghandour via gem5-users
> > Sent: 12 October 2021 08:50
> > To: gem5-users@gem5.org
> > Cc: Ali Ghandour
> > Subject: [gem5-users] Re: Porting a configuration file from gem5 v20 to
> gem5
> > v21
> >
> > Hi Giacomo,
> >
> > Indeed, I was able to use ArmMMU.connectWalkerPorts method and run
> > the config file in fs mode.
>
> Great!
>
> > However, I a, still struggling with the segmentation fault in se mode.
> >
> > Does it make any sense to have a config file working in fs mode but
> failing in
> > se? (notice that it is running in both fs and se mode in v20.0.0.)
> >
>
> It does as I believe the two issues (in SE and FS) are not related to each
> other. You are probably hitting another bug in SE mode.
> If you are getting a segmentation fault you are probably trying to
> dereference an invalid pointer (nullptr?). With GDB, could you navigate the
> stack frames
> until you find the invalid pointer? (just print the pointer you are trying
> to dereference)
>
> > Ali
> > ___
> > gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an
> > email to gem5-users-
> > le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
>
> Kind Regards
>
> Giacomo
> IMPORTANT NOTICE: The contents of this email and any attachments are
> confidential and may also be privileged. If you are not the intended
> recipient, please notify the sender immediately and do not disclose the
> contents to any other person, use it for any purpose, or store or copy the
> information in any medium. Thank you.
>
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[gem5-users] Re: Porting a configuration file from gem5 v20 to gem5 v21
> -Original Message- > From: Ali Ghandour via gem5-users > Sent: 12 October 2021 08:50 > To: gem5-users@gem5.org > Cc: Ali Ghandour > Subject: [gem5-users] Re: Porting a configuration file from gem5 v20 to gem5 > v21 > > Hi Giacomo, > > Indeed, I was able to use ArmMMU.connectWalkerPorts method and run > the config file in fs mode. Great! > However, I a, still struggling with the segmentation fault in se mode. > > Does it make any sense to have a config file working in fs mode but failing in > se? (notice that it is running in both fs and se mode in v20.0.0.) > It does as I believe the two issues (in SE and FS) are not related to each other. You are probably hitting another bug in SE mode. If you are getting a segmentation fault you are probably trying to dereference an invalid pointer (nullptr?). With GDB, could you navigate the stack frames until you find the invalid pointer? (just print the pointer you are trying to dereference) > Ali > ___ > gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an > email to gem5-users- > le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Kind Regards Giacomo IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ___ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
[gem5-users] Re: Porting a configuration file from gem5 v20 to gem5 v21
Hi Giacomo, Indeed, I was able to use ArmMMU.connectWalkerPorts method and run the config file in fs mode. However, I a, still struggling with the segmentation fault in se mode. Does it make any sense to have a config file working in fs mode but failing in se? (notice that it is running in both fs and se mode in v20.0.0.) Ali ___ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
[gem5-users] Re: Porting a configuration file from gem5 v20 to gem5 v21
Hi Ali, > -Original Message- > From: Ali Ghandour via gem5-users > Sent: 05 October 2021 15:44 > To: gem5-users@gem5.org > Cc: Ali Ghandour > Subject: [gem5-users] Re: Porting a configuration file from gem5 v20 to gem5 > v21 > > In FS mode, full errror stack below: > > Traceback (most recent call last): > File "", line 1, in > File "build/ARM/python/m5/main.py", line 455, in main > File "./RPIv4.py", line 535, in > main() > File "./RPIv4.py", line 512, in main > root.system = systemCreate(args) > File "./RPIv4.py", line 297, in systemCreate > system = RPISystemCreate(ArmSystem, args, mode) > File "./RPIv4.py", line 182, in RPISystemCreate > return RPISystem(args, mode) > File "./RPIv4.py", line 127, in __init__ > self.configMem(args) > File "./RPIv4.py", line 158, in configMem > self.cpu_cluster.connectDirect(self.membus) > File "/home/ali/Desktop/spirals/reproduce-spectre- > gem5/gem5/./ARMv8A_Cortex_A72.py", line 325, in connectDirect > cpu.dtb.walker.port = bus.slave > File "build/ARM/python/m5/SimObject.py", line 1416, in __getattr__ >From v21.0 the BaseCPU is interfacing to the MMU rather than the TLBs [1]: So you should amend your configuration file accordingly. I suggest you to have a look at the ArmMMU.connectWalkerPorts anyway [2] > AttributeError: object 'ARM_A72_TLB_L1D' has no attribute 'walker' > (C++ object is not yet constructed, so wrapped C++ methods are > unavailable.) ___ > gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an > email to gem5-users- > le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Kind Regards Giacomo [1]: https://github.com/gem5/gem5/blob/v21.0.0.0/src/cpu/BaseCPU.py#L154 [2]: https://github.com/gem5/gem5/blob/v21.0.0.0/src/arch/arm/ArmMMU.py#L52 IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ___ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
[gem5-users] Re: Porting a configuration file from gem5 v20 to gem5 v21
Hi Jason, I am not sure this is the same issue. I compiled the hello.c example using the below make file and run it in se mode using my config file and still received the segmentation error: CC=aarch64-linux-gnu-gcc CFLAGS=-Wall -g3 -march=armv8-a -static -O0 # -I../ all: arm arm: $(CC) $(CFLAGS) -c hello.c -o hello.o $(CC) $(CFLAGS) hello.o -o hello Please advise. Ali ___ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
[gem5-users] Re: Porting a configuration file from gem5 v20 to gem5 v21
Hi Ali, Is your guest code 32-bit Arm? If so, I think this could be the problem in SE mode: https://gem5.atlassian.net/browse/GEM5-1074 Cheers, Jason On Tue, Oct 5, 2021 at 7:45 AM Ali Ghandour via gem5-users < gem5-users@gem5.org> wrote: > In FS mode, full errror stack below: > > Traceback (most recent call last): > File "", line 1, in > File "build/ARM/python/m5/main.py", line 455, in main > File "./RPIv4.py", line 535, in > main() > File "./RPIv4.py", line 512, in main > root.system = systemCreate(args) > File "./RPIv4.py", line 297, in systemCreate > system = RPISystemCreate(ArmSystem, args, mode) > File "./RPIv4.py", line 182, in RPISystemCreate > return RPISystem(args, mode) > File "./RPIv4.py", line 127, in __init__ > self.configMem(args) > File "./RPIv4.py", line 158, in configMem > self.cpu_cluster.connectDirect(self.membus) > File > "/home/ali/Desktop/spirals/reproduce-spectre-gem5/gem5/./ARMv8A_Cortex_A72.py", > line 325, in connectDirect > cpu.dtb.walker.port = bus.slave > File "build/ARM/python/m5/SimObject.py", line 1416, in __getattr__ > AttributeError: object 'ARM_A72_TLB_L1D' has no attribute 'walker' > (C++ object is not yet constructed, so wrapped C++ methods are > unavailable.) > ___ > gem5-users mailing list -- gem5-users@gem5.org > To unsubscribe send an email to gem5-users-le...@gem5.org > %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s > ___ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
[gem5-users] Re: Porting a configuration file from gem5 v20 to gem5 v21
In FS mode, full errror stack below: Traceback (most recent call last): File "", line 1, in File "build/ARM/python/m5/main.py", line 455, in main File "./RPIv4.py", line 535, in main() File "./RPIv4.py", line 512, in main root.system = systemCreate(args) File "./RPIv4.py", line 297, in systemCreate system = RPISystemCreate(ArmSystem, args, mode) File "./RPIv4.py", line 182, in RPISystemCreate return RPISystem(args, mode) File "./RPIv4.py", line 127, in __init__ self.configMem(args) File "./RPIv4.py", line 158, in configMem self.cpu_cluster.connectDirect(self.membus) File "/home/ali/Desktop/spirals/reproduce-spectre-gem5/gem5/./ARMv8A_Cortex_A72.py", line 325, in connectDirect cpu.dtb.walker.port = bus.slave File "build/ARM/python/m5/SimObject.py", line 1416, in __getattr__ AttributeError: object 'ARM_A72_TLB_L1D' has no attribute 'walker' (C++ object is not yet constructed, so wrapped C++ methods are unavailable.) ___ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
