So your situation could be that you have two bugs, where the first to occur sometimes causes SIGSEGV, and the second (if the segfault didn't happen and the program is still Please post beginner questions to learn unix and learn linux in this forum UNIX for Beginners Questions & Answers Search Forums Show Threads Show Posts Tag Search Advanced Search Unanswered based on MAC address -- why not "based on MAC addresses"? Information to Collect if You Open a Service Request If you still need assistance after following the troubleshooting steps above and want to open a case with Cisco Technical Support, be Source
FPE_INTDIV_TRAP Integer division by zero. Converting a virtual address to a physical address can be a somewhat expensive operation. You set up an uint8_t array, add one, two, or three to the array's pointer and then typecast to a short, int, or long and try to access the offending result.) An invalid memory access would likely be trapped as an access violation or similar by the memory manager (and it never even has a chance to hit the bus).
The default action for these two signals is to terminate the program. I think that since most[?] modern compilers for most processors pad / align the data for the programmers, the alignment troubles of yore (at least) mitigated, and hence one does not It's not so much type conversion as you're doing type conversion on a pointer that you've done pointer math on.
In reality, your computer will have a much greater range than 0x00 to 0xFF. The things that had changed were that the process was recompiled, AND we were at 96% (df -k) on that disk... Could the Industrial Revolution be delayed indefinitely? Bus Error Vs Segmentation Fault You might have better luck with loading a known-invalid address into a pointer and dereferwncing that.
The Intel x86 is, by the way, not such an architecture, it would allow the access (albeit execute it more slowly). Bus Error Linux On the ARM system I'm working with (which doesn't have virtual memory) there are large portions of the address space which have no memory or peripheral assigned. To answer your original post: Tell me some situation which is sure to produce a bus error. FPE_INTOVF_TRAP Integer overflow (impossible in a C program unless you enable overflow trapping in a hardware-specific fashion).
asked 6 years ago viewed 10518 times active 3 years ago Upcoming Events 2016 Community Moderator Election ends in 4 days Linked 13 x86: howto catch data-alignment faults (aka SIGBUS on How To Solve Bus Error In Linux armor proficiency feats Is there a command for running a script according to its shebang line? Can anyone explain why this causes a bus error? Being vulnerable to bus errors is a sign of bad management.
On most machines, this is just another name for SIGABRT. For lower-end platforms such as the 3600 or 4000 router, reseat the network modules/network processors. Bus Error C++ Contents 1 Causes 1.1 Non-existent address 1.2 Unaligned access 1.3 Paging errors 2 Example 3 References Causes There are at least three main causes of bus errors: Non-existent address Software instructs How To Debug Bus Error sptr = (short *)(((char *)sptr) + 1); *sptr = 100; */ return 0; } Compiling and running the example on a POSIX compliant OS on x86 demonstrates the error: $ gcc
On the other hand, if the address falls within one of the ranges in the show region output, it means that the router accessed a valid memory address, but the hardware this contact form But the same code on my two handy x86 machines segfaults, you're right. –Seth Jan 15 '10 at 4:39 1 This depends on your OS and configuration, too -- if trying to read or write memory that you don't own. share|improve this answer answered Nov 19 '15 at 13:56 Alleo 1,3361422 add a comment| up vote 0 down vote This could refer to human problems too. Bus Error (core Dumped ) Linux
Not the answer you're looking for? The mmap spec says that: References within the address range starting at pa and continuing for len bytes to whole pages following the end of an object shall result in delivery It's a good idea to reseat or firmly push the memory chips into the slot. http://alltechgossip.com/bus-error/bus-error-in-c.html share|improve this answer edited Dec 17 '14 at 8:36 answered Oct 17 '08 at 14:58 unwind 258k39338464 1 In case, I had data; This is now a multiple of 4
Why do most of us wear wristwatches on the left hand? Bus Error (core Dumped) C Main corresponds to main memory or dynamic RAM (DRAM). Firearm transfer between CA and WA How do I convert text to datetime?
The time now is 04:52 AM. - Contact Us - UNIX & Linux - unix commands, linux commands, linux server, linux ubuntu, shell script, linux distros. - Advertising - Top I dunno ... Components Used The information in this document is based on these software and hardware versions: All Cisco IOS® software versions All Cisco routers Note:This document does not apply to Cisco Catalyst Bus Error (core Dumped) Ubuntu Browse other questions tagged c or ask your own question.
part of the question. The compiler has carefully dword aligned your pointer for data- and then you screw everything up on the compiler by offsetting the reference by TWO and typecasting to a very much More to the point, the cpu can catch this error immediately by looking at the virtual address. http://alltechgossip.com/bus-error/what-is-bus-error-10.html Troubleshooting Techniques for Bus Error Exception Boot Loops This section focuses on general troubleshooting techniques for bus error exception boot loops: Cisco IOS software loaded does not support installed hardware Software
There are two main types of processors in Cisco routers: 68000 Processors This is part of a show version output that indicates that the router has a 68000 processor: cisco 2500 Try this code: #include
Unlike bytes, larger units can span two aligned addresses and would thus require more than one fetch on the data bus. Example This is an example of unaligned memory access, written in the C programming language with AT&T assembly syntax. #include