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Bus Errors X86


In modern use on most architectures these are much rarer than segmentation faults, which occur primarily due to memory access violations: problems in the logical address or permissions. Intel's processors (x86 family) have 4 CPLS: 0, 1, 2, 3. In this case, the problem is, that an address outside the permissible virtual address address space was specified. share|improve this answer answered Apr 18 '12 at 19:59 Mischa 62468 Can you?

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 Browse other questions tagged linux debugging bus-error sigbus or ask your own question. unaligned memory access. This means, that the kernel sends a SIGBUS because of an access to an invalid address (every address >= 0x800000000000), as opposed to a SIGSEGV, which means, that an access error

Bus Error C++

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 If you're running on a platform with virtual memory, you might not be able to intentionally generate a bus error with your program unless it's a device driver or other kernel Mountainering with 6 y.o. After much googling, I still can't figure out why..

  1. Why don't my users have separate desktops in Windows 10?
  2. You probably do not have access to such a system.
  3. untested. #include typedef struct { int a; int b; } busErr; int main() { busErr err; char * cPtr; int *iPtr; cPtr = (char *)&err; cPtr++; iPtr = (int *)cPtr; *iPtr
  4. c memory-alignment share|improve this question edited Jun 7 '12 at 16:22 Peter Mortensen 10.4k1370108 asked Sep 30 '09 at 8:48 user172818 2,322917 What is the platform you are working
  5. Rounding a number up to the nearest multiple of a power of 2 Make loop more efficient Should I have doubts if the organizers of a workshop ask me to sign
  6. Would like to test this myself at some point.
  7. In your code, index into memory way outside the scope of the max memory limit.

You can also get it from accessing a memory mapped device if there's an error of some kind. Mountainering with 6 y.o. Multiplication Formatting "International" vs "Foreign" How far above a waterfall should you be to safely cross? How To Debug Bus Error Do Matrix Multiplication!

Is the Joker Based on anything? Related 85x86 Assembly - 'testl' eax against eax?1Is there a program to change hex code to assembly code in x86?3“call 0x80482f0 ”? Intel provides a way to switch off this feature. However, since the x86 abi only has doubles aligned to 4 bytes and not 8, it leads to spurious SIGBUS on most floating point code... :-( This makes it just about

c++ bus-error share|improve this question edited Jan 15 '10 at 9:50 asked Jan 15 '10 at 4:06 Lazer 25.4k68212312 2 What platform and hardware architecture are you using? –R Samuel How To Solve Bus Error In Linux How to have table blanks as zeros? Just need clarification of one line of code in a 'hello world' program in x86 assembly0Possible error with this x86 assembly example0string arrays in x86 assembly: get a line at a From: Here share|improve this answer answered Oct 17 '08 at 14:54 Oli 93.1k45160228 Depends on the nasty tricks you're doing with your code.

Bus Error Linux

Does that mean that OS X Mavericks is buggy? Apr 27 '12 at 4:20 Interesting idea, thanks. –Marco van de Voort Apr 27 '12 at 7:56 add a comment| Your Answer draft saved draft discarded Sign up Bus Error C++ That's what is causing the bus error in this case. Sigbus Error Linux It only affects the process that turned it on.

accessing a memory-mapped file or executing a binary image which has been truncated while the program was running),[2] or because a just-created memory-mapped file cannot be physically allocated, because the disk For example, if multi-byte accesses must be 16 bit-aligned, addresses (given in bytes) at 0, 2, 4, 6, and so on would be considered aligned and therefore accessible, while addresses 1, Possible worry 5. Why do solar planes have many small propellers instead of fewer large ones? Linux Bus Error Core Dumped

Privacy policy About Wikipedia Disclaimers Contact Wikipedia Developers Cookie statement Mobile view Bus error From Wikipedia, the free encyclopedia Jump to: navigation, search This article needs additional citations for verification. Here is the code: #include int main(void) { asm("pushf\n" "orl $ 0x40000, (%esp)\n" "popf\n"); *((int*) (((char*) malloc(5)) + 1)) = 23; // This line causes the Bus Error return 0; Trying to access an undefined virtual memory address is generally considered to be a segmentation fault rather than a bus error, though if the MMU is separate, the processor can't tell Why rotational matrices are not commutative?

In the example, we have to enable alignment checking to see the bus error. Bus Error Vs Segmentation Fault Do Matrix Multiplication! kid in winter 5 Favorite Letters more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life

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There's even a wikipedia article about bus errors, including a program to make one. Write a comment : name : password : homepage secret mode ◀ PREV : [1] : ... [29] : [30] : [31] : [32] : [33] : [34] : [35] : Why is engine displacement frequently a few CCs below an exact number? Gdb Bus Error Tags Guestbook Admin Logout Notice읽고싶은 책 / 갖고싶은 음반 목록zookeeper Search Category 분류 전체보기 (207) Music (23) Classical (11) Others (12) Swing (0) English (27) NBC Nightly News (6) NBC Meet

Alignment does apply to x86. Browse other questions tagged c unix segmentation-fault bus-error or ask your own question. Please click the link in the confirmation email to activate your subscription. on the other hand SPARC arches do have a bus error. –Evan Teran Jan 15 '10 at 6:50 1 No, see Michael Burr's comments and my answer.