Bus Error Assembly
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Bus Error In Linux
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How To Debug Bus Error
them; it only takes a minute: Sign up What is a 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 how to solve bus error in linux add a comment| 15 Answers 15 active oldest votes up vote 150 down vote accepted Bus errors are 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 5,70322336 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
challenged and removed. (July 2015) (Learn how and when to remove this template message) In computing, a bus error is a fault raised
Bus Error Vs Segmentation Fault
by hardware, notifying an operating system (OS) that a process is
Bus Error 10 Mac
trying to access memory that the CPU cannot physically address: an invalid address for the address sigbus error linux bus, hence the name. In modern use on most architectures these are much rarer than segmentation faults, which occur primarily due to memory access violations: problems in http://stackoverflow.com/questions/212466/what-is-a-bus-error the logical address or permissions. On POSIX-compliant platforms, bus errors usually result in the SIGBUS signal being sent to the process that caused the error. SIGBUS can also be caused by any general device fault that the computer detects, though a bus error rarely means that the computer hardware is physically broken—it is normally caused https://en.wikipedia.org/wiki/Bus_error by a bug in a program's source code.[citation needed] Bus errors may also be raised for certain other paging errors; see below. Contents 1 Causes 1.1 Non-existent address 1.2 Unaligned access 1.3 Paging errors 2 Example 3 References Causes[edit] There are at least three main causes of bus errors: Non-existent address[edit] Software instructs the CPU to read or write a specific physical memory address. Accordingly, the CPU sets this physical address on its address bus and requests all other hardware connected to the CPU to respond with the results, if they answer for this specific address. If no other hardware responds, the CPU raises an exception, stating that the requested physical address is unrecognized by the whole computer system. Note that this only covers physical memory addresses. 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 the difference. Unaligned access[edit] M
from GoogleSign inHidden fieldsBooksbooks.google.comhttps://books.google.com/books/about/Assembly_Language_and_Systems_Programmin.html?id=2BUEEgvMcyUC&utm_source=gb-gplus-shareAssembly Language and Systems Programming for the M68000 FamilyMy libraryHelpAdvanced Book SearchGet print bookNo eBook availableJones & Bartlett https://books.google.com/books?id=2BUEEgvMcyUC&pg=PA722&lpg=PA722&dq=bus+error+assembly&source=bl&ots=o4xEsnu1XM&sig=HUIutYGzXyd-aRwTcUSBb6Ric3M&hl=en&sa=X&ved=0ahUKEwiaiKextrbPAhVM4IMKHReLAk8Q6AEIUTAI LearningAmazon.comBarnes&Noble.comBooks-A-MillionIndieBoundFind in a libraryAll sellers»Get Textbooks on Google PlayRent and save from the world's largest eBookstore. Read, highlight, and take https://www.iprogrammatori.it/forum-programmazione/assembly/bus-error-indirizzo-inesistente-t26884.html notes, across web, tablet, and phone.Go to Google Play Now »Assembly Language and Systems Programming for the M68000 FamilyWilliam Ford, William bus error R. ToppJones & Bartlett Learning, 1992 - Computers - 1134 pages 0 Reviewshttps://books.google.com/books/about/Assembly_Language_and_Systems_Programmin.html?id=2BUEEgvMcyUC Preview this book » What people are saying-Write a reviewWe haven't found any reviews in the usual places.Selected pagesTitle PageTable of ContentsIndexContentsINTRODUCTION 1 Chapter 7 REPRESENTATION OF DATA bus error 10 15 Chapter 3 59 Central 65 Terminals 70 Printers 72 The SMC68000 System 79 SMC68000 Instructions 80 80 SMC68000 Programs 84 The SMC68000 Instruction Execu 90 Chapter 10 455 COMMUNICATION INTERFACE PROGRAMMING 573 Exercises 635 EXCEPTION PROCESSING 641 Exception 664 Exceptions 670 Exercises 722 Programming Exercises 731 MoreASSEMBLY LANGUAGE PROGRAMMING 101 Exercises 141 Chapter 5 149 ARRAYS AND STACKS 211 SUBROUTINES 269 Exercises 307 Programming Exercises 313 Exercises 387 CHARACTER HANDLING 393 Exercises 448 Chapter 15 789 Exercises 886 Appendix A-2 Appendix B M68000 FAMILY OF SUPERVISOR PRIVILEGED A-155 COPROCESSOR INSTRUCTIONS AI69 A-170 INPUTOUTPUT LIBRARIES AI83 A-184 Appendix E CONDITION CODE COMPUTATIONS A2II A-212 INDEX A235 A-221 Copyright LessOther editions - View allAssembly Language and Systems Programming for the M68000 Family
Aziende iscritte Forum Generale Indice Forum Registrazione Login Area Software Ingegneria del software Assembly Microsoft .NET C/C++ Delphi Java Matlab e Simulink Python Area Web HTML Javascript, JQuery, Ajax ASP.NET PHP Webmaster Mobile Android Apple iOS e Objective-C Windows Phone Database Progettazione Database Microsoft Access SQL Server MySQL Oracle Excel Hardware & OS Microsoft Windows Linux Hardware e Reti Corsi di informatica Eventi ICT Articoli Programmazione software Server e hosting News Software & utility Sviluppo software Il Tuo Indirizzo IP Collegamenti Rapidi Messaggi senza risposta Argomenti attivi Cerca Forum Iscritti Staff FAQ Login Iscriviti Cerca Login Iscriviti Indice Area Software Assembly Cerca Oggi è 05 ott 2016, 02:37 Tutti gli orari sono UTC+01:00 Bus Error: Indirizzo inesistente L'assembly è il linguaggio di programmazione più vicino al linguaggio macchina Moderatori: Toki, M.A.W. 1968 Regole del forum Leggi: IProgrammatori.it - Regolamento Forum Rispondi Stampa pagina Cerca Ricerca avanzata 5 messaggi • Pagina 1 di 1 Eduadie Utente Semi-Senior Messaggi: 193 Iscritto il: 05 mar 2013, 23:22 Bus Error: Indirizzo inesistente Cita Messaggioda Eduadie » 29 gen 2016, 20:25 Ci risiamo, questo Assembler non mi va proprio giù. Dopo aver perso un giorno intero a fare questo esercizio mi si presenta il seguente errore in ASIM: "Bus Error: indirizzo inesistente o non valido".Facendo vari tentativi se metto il codice tutto in Long Word mi funziona a meraviglia, se invece lo rimetto a Word mi da quest'errore.Sicuramente sto sbagliando qualcosa con gli indirizzi ma non riesco proprio a risolvere, qualcuno che oltre a darmi la dritta su come risolverlo mi spieghi anche il semplice perchè? Ecco il codice:Codice: Seleziona tutto*Scrivere un programma che realizzi il confronto tra 5 numeri e li disponga in modo decrescente.
ORG $8000
NumeroDiElementi EQU 5
* Main
Start
lea Risultato,a0 * a0 = puntatore al primo elemento dell'array risultato
move.w a0,a2 * a2 = copia del puntatore al primo elemento dell'array risultato in cui copierò i valori
lea Vettore,a1 * a1 = puntatore al primo elemento dell'array da ordinare
move.w #NumeroDiElementi-1,d0 * d0 = numero di iterazioni (n-1)
move.w d0,d1 * d1 = me ne faccio una copia da usare per ricopiare l'array con indirizzo a1 in a2
LoopCop