Mips Bus Error
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Bus Error Linux
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How To Fix Bus Error In Linux
error? up vote 156 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 15.7k51952 asked Oct 17 '08 at 14:48 raldi 7,272216178 add a comment| 15 Answers 15 active oldest votes up vote 151 down vote accepted Bus errors are how to debug bus error rare nowadays 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 5,72322336 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 a
data bus error From: Jon Dufresne
Bus Error Vs Segmentation Fault
I am currently running into a strange problem when writing a
Bus Error Core Dumped C
lot of data to iomemory. I have written a test function that looks like this: void gdb bus error test_iomem(struct pci_dev *dev) { void __iomem *mem; unsigned long start; unsigned long size; start = pci_resource_start(dev, 0); size = pci_resource_len(dev, 0); printk("start=%08lx size=%08lx\n", start, size); mem = http://stackoverflow.com/questions/212466/what-is-a-bus-error ioremap(start, size); while(1) { printk("memset %p\n", mem); memset_io(mem, 0, 10000); } } This function is just being used to test the iomemory. If this works, it should just keep writing 0's to the iomemory forever (at least as I understand it). When I run insmod on this device driver I see the following output: start=20000000 https://www.linux-mips.org/archives/linux-mips/2008-02/msg00030.html size=04000000 memset c0580000 memset c0580000 memset c0580000 ... ... ... And this goes on for quite some time. Eventually it will stop, moments later I will see a kernel panic with the following output: > memset c0580000 > memset c0580000 > memset c0580000 > Data bus error, epc == c027a64c, ra == 800aa27c > Oops[#1]: > Cpu 0 > $ 0 : 00000000 10008400 c0363050 00063050 > $ 4 : 00000037 82937800 8109d000 10008401 > $ 8 : 10008400 1000001f 80320000 80320000 > $12 : 80320000 00000001 83133bf8 8031c960 > $16 : 8311c600 00000080 00000001 00000037 > $20 : c02815e8 802e1ae4 c025a000 8008cde4 > $24 : 00000008 00000000 > $28 : 83132000 83133be8 c02815ac 800aa27c > Hi : 00000000 > Lo : 00000800 > epc : c027a64c Tainted: P > ra : 800aa27c Status: 10008403 KERNEL EXL IE > Cause : 1080801c > PrId : 00061200 > Modules linked in: tmman1700(P) mousedev usbhid usb_storage phStbFB(P) > phStbFBRead(P) phStbVideoRenderer(P) phStbVideoRenderer_Layer(P) > phStbStreamingSystem
[x] User account creation filtered due to spam. Bug10801 - ld bus error on linking .libs/libstdc++ under mips-irix-6.3 Summary: ld bus error on linking .libs/libstdc++ under mips-irix-6.3 Status: RESOLVED FIXED Alias: None Product: gcc Classification: Unclassified Component: libstdc++ bus error (show other bugs) Version: 3.2 Importance: P2 critical Target Milestone: --- Assignee: rsandifo@gcc.gnu.org URL: Keywords: Depends on: Blocks: Reported: 2003-05-15 13:06 UTC by rjvbertin Modified: 2003-07-25 17:33 UTC (History) CC List: 4 users (show) gcc-bugs rjvbertin rsandifo rsandifo mips bus error See Also: Host: Target: Build: Known to work: Known to fail: Last reconfirmed: Attachments Add an attachment (proposed patch, testcase, etc.) Note You need to log in before you can comment on or make changes to this bug. Description rjvbertin 2003-05-15 13:06:01 UTC Towards the end of the build process, I get the following failure: /usr/people/bertin/work/src/new/gcc323-build/gcc/xgcc -shared-libgcc -B/usr/people/bertin/work/src/new/gcc323-build/gcc/ -nostdinc++ -L/usr/people/bertin/work/src/new/gcc323-build/mips-sgi-irix6.3/libstdc++-v3/src -L/usr/people/bertin/work/src/new/gcc323-build/mips-sgi-irix6.3/libstdc++-v3/src/.libs -B/usr/local/gcc3.2.3-n32/mips-sgi-irix6.3/bin/ -B/usr/local/gcc3.2.3-n32/mips-sgi-irix6.3/lib/ -isystem /usr/local/gcc3.2.3-n32/mips-sgi-irix6.3/include -shared -nostdlib /usr/people/bertin/work/src/new/gcc323-build/gcc/crtbegin.o .libs/bitset.o .libs/codecvt.o .libs/complex_io.o .libs/concept-inst.o .libs/ctype.o .libs/ext-inst.o .libs/fstream.o .libs/fstream-inst.o .libs/functexcept.o .libs/globals.o .libs/io-inst.o .libs/ios.o .libs/istream-inst.o .libs/limits.o .libs/locale.o .libs/locale-inst.o .libs/localename.o .libs/misc-inst.o .libs/ostream-inst.o .libs/sstream-inst.o .libs/stdexcept.o .libs/stl-inst.o .libs/streambuf-inst.o .libs/string-inst.o .libs/strstream.o .libs/valarray-inst.o .libs/vterminate.o .libs/wstring-inst.o .libs/codecvt_members.o .libs/collate_members.o .libs/ctype_members.o .libs/messages_members.o .libs/monetary_members.o .libs/numeric_members.o .libs/time_members.o .libs/basic_file.o .libs/c++locale.o .libs/libstdc++.lax/libmath.a/stubs.o .libs/libstdc++.lax/libmath.a/signbit.o .libs/libstdc++.lax/libmath.a/signbitl.o .libs/libstdc++.lax/libmath.a/signbitf.o .libs/libstdc++.lax/libmath.a/copysignf.o .libs/libstdc++.lax/libmath.a/nan.o .libs/libstdc++.lax/libsupc++convenience.a/cxa_demangle.o .libs/libstdc++.lax/libsupc++convenience.a/new_handler.o .libs/libstdc++.lax/libsupc++convenience.a/eh_alloc.o .libs/libstdc++.lax/libsupc++convenience.a/pure.o .libs/libstdc++.lax/libsupc++convenience.a/del_opnt
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