Data Bus Error Exception
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Bus Error Exception Os161
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System Received A Bus Error Exception Cisco 2600
View in various apps on iPhone, iPad, Android, Sony Reader, or Windows Phone Mobi (Kindle) (129.9 KB) View on Kindle device or Kindle app imprecise data bus error on multiple devices Updated:Jun 16, 2016 Document ID:7949 ContentsIntroductionPrerequisitesRequirementsComponents UsedConventionsIdentifying Bus Error CrashesTroubleshooting Bus Error CrashesTroubleshooting Bus Error Crashes on 68000 Processor PlatformsTroubleshooting Bus Error Crashes on RISC Processor PlatformsSpecial Types of Bus Error CrashesTroubleshooting Techniques for Bus Error Exception Boot LoopsCisco IOS Software Loaded Does Not Support Installed bus error linux HardwareSoftware FailureMis-seated HardwareHardware FailureInformation to Collect if You Open a Service RequestRelated Information Introduction This document explains how to identify bus error crashes and how to troubleshoot those crashes depending on the type of processor you have in your Cisco router. Prerequisites Requirements Cisco recommends that you read Troubleshooting Router Crashes before proceeding with this document. Components Used The information in this document is based on these software and hardware versions: All Cisco IOSĀ® software versions All Cisco routers Note:This document does not apply to Cisco Catalyst switches or MGX platforms. The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command. Conventions Refer to the Cisco Technical Tips Conventi
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System Returned To Rom By Bus Error At Pc 0x0 Address 0x0
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System Returned To Rom By Address Error At Pc
Join them; it only takes a minute: Sign up Catching a data bus error exception in kernel mode up vote 0 down vote favorite I'm running Linux on a microblaze in a Virtex 5 chip. I actually have two http://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/ios-software-releases-121-mainline/7949-crashes-buserror-troubleshooting.html chips running the same Linux code, but with different HDL modules in the chip. I'm writing a driver that I want to be able to detect which chip it's running on and do different things based on that. During the driver init, I try to read an ID register from an HDL module that exists on one of the chips and not on the other, but on the chip where it doesn't exist, I get a 'Data bus http://stackoverflow.com/questions/33293499/catching-a-data-bus-error-exception-in-kernel-mode error exception in kernel mode.' Oops. Is there some way to catch this exception and continue loading my driver? Here's the code: unsigned region; unsigned long *res; unsigned int val; region = request_mem_region( 0x66000000, 100, NULL ); if ( region ) { res = ioremap( 0x66000000, 100 ); if ( res ) { val = ioread32( res ); // exception happens here if ( val == REGID1 ) printk( "we are on chip 1\n" ); else printk( "we are on chip 2\n" ); iounmap( res ); } release_mem_region( 0x66000000, 100 ); } linux linux-kernel linux-device-driver share|improve this question asked Oct 23 '15 at 1:35 JonS 14911 it seems the physical address you are using is seems to be wrong. check your processor i/o memory map. once verify the ranges from cat /proc/iomem –AnshuMan Gupta Oct 24 '15 at 9:11 I said in the question that the address doesn't exist, that's how I'm determining which chip the code is running on. I need to catch the exception and use the fact that the exception happened as the indicator. –JonS Oct 25 '15 at 3:55 add a comment| active oldest votes Know someone who can answer? Share a link to this question via email, Google+, Twitter, or Facebook. Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About http://stackoverflow.com/questions/212466/what-is-a-bus-error Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up What is a bus error? bus error up vote 155 down vote favorite 49 What does the "bus error" message mean, and how does it differ from a segfault? c unix segmentation-fault bus-error share|improve this question edited Oct 18 '15 at 10:44 Cool Guy 15.8k51952 asked Oct 17 '08 at 14:48 raldi 7,239216178 add a comment| 15 Answers 15 active oldest votes up vote 150 down vote accepted Bus errors are rare nowadays bus error exception on x86 and occur when your processor cannot even attempt the memory access requested, typically: using a processor instruction with an address that does not satisfy its alignment requirements. Segmentation faults occur when accessing memory which does not belong to your process, they are very common and are typically the result of: using a pointer to something that was deallocated. using an uninitialized hence bogus pointer. using a null pointer. overflowing a buffer. PS: To be more precise this is not manipulating the pointer itself that will cause issues, it's accessing the memory it points to (dereferencing). share|improve this answer edited Oct 17 '08 at 15:18 answered Oct 17 '08 at 15:12 bltxd 5,71322336 52 They aren't rare; I'm just at Exercise 9 from How to Learn C the Hard Way and already encountered one... –11684 Mar 26 '13 at 20:12 5 Another cause of bus errors (on Linux anyway) is when the operating system can't back a virtual page with physical memory (e.g. low-memory conditions or out of huge pages when using huge page memory.) Typically mmap (and malloc) just reserve the virtual address space, and the kernel assigns the physical memory o