Error 65 access violation at c 0x0000 no execute read permission

µVISION DEBUGGER: Error 65: Access Violation

SYMPTOMS

When trying to write to a variable or memory location, the Keil µVision Debugger issues an Error 65 message:

I have specified this memory area in the Target options, but I still receive this error. Other versions of the error could be:

• Error 65: Access violation at [Address] : No ‘write’ permission
• Error 65: Access violation at [Address] : No ‘read’ permission
• Error 65: Access violation at [Address] : No ‘execute/read’ permission

BACKGROUND

When the µVision Debugger loads an executable program, the µVision Simulator uses the loaded program and data segments to create a memory map:

• Code segments are marked as executable
• Data segments are marked as read/write
• All other memory is unmapped and is, therefore, not marked for any type of access

While executing, the debugger checks that memory accesses are only made to objects that are defined in the program, i.e., the debugger by default only allows memory accesses to valid data objects. For any access that is outside of a defined C object, the µVision debugger generates an error message.

Usually, there is a programming error when you try to access unexpected locations. For example:

• Uninitialized or incorrectly initialized pointers
• Access library or bootloader code that was not loaded into the simulator
• Accessing a peripheral that is not simulated, see µVision DEBUGGER: Simulation of Cortex-M Devices
• Memory did not get remapped correctly, see µVision DEBUGGER: Error 65 Using Remap Feature on Arm
• A user revoked permissions of a memory area, see µVision DEBUGGER: Breakpoints in Memory Regions
• Incorrect Simulator startup options, see µVision DEBUGGER: Access Violation 0x00C000 with XC16X

Note: If debugging on a target, Access Violation could mean a bus issue, device lockup, or memory remap is preventing the debugger from reaching the memory.

RESOLUTION

If the error is memory region that should be accessed, update the memory map the simulator uses. Define all the memory ranges that your program is permitted to access. Ensure each memory range has the proper permissions (read, write, execute) that match the memory of the actual hardware.

Use the Memory Map Dialog

• While debugging, select Debug — Memory Map — the dialog opens
• Enter a range in START, END, format
• Choose the permissions (read, write, execute)
• Click Map Range
• Close the dialog

Use the MAP Command in the Command Window

• While debugging, Select View — Command window
• By the Command prompt, enter a MAP command and press enter:

Note: For 8051 devices, the address may need a prefix, e.g., a memory specifier in the table on this page. For example, In the Memory Map dialog C:0xF800 refers to Code address 0xF800.

Use a Debug Initialization File

Any memory map changes could be lost during the next debug session. Once you find the correct memory put the required MAP commands into a debugger INI file.

• In Editor mode, select File — New
• Save the file in the project folder with a .ini extension
• Select Project — Options for Target — Debug and enter the location of the .ini file.
• In the .ini file add the MAP command. For example:

Источник

ERROR 65 in ARM KEIL 5 (Permissions error)

I’m relatively new in ARM Cortex M4 series micro-controller. When I’m trying to debug a simple project(blinky which easily just blinks a led on and off) using KEIL 5 simulator, I get an error like this:

* error 65: access violation at 0x400FE608 : no ‘read’ permission * error 65: access violation at 0x400FE608 : no ‘write’ permission

I searched on internet for a solution, and I get this one:

But actually it is not easy and not logical to mention all the addresses to which I want to access in my whole code like the method mentioned above.

could anybody suggest something else for me please?

(Actually I get this error with all projects which I intended to simulate so I can’t simulate anything).

Here is the simple code which I have been using:

and I am using this mc: TM4C1294NCPDT

2 Answers 2

I have a similar problem with KEIL V5, in a CMSIS project with LPC1768 microcontroller.

When debugging with real microcontroller as target, everything works fine. Debugging with simulator as target, when CMSIS tries to initialize the System core clock I get:

Is this really sample code from the chip vendor? The definition of GCGPIOR should be volatile .

Have you selected the correct device in the simulator/project configuration? Have you installed the Keil::TM4C_DFP device package and are you using the correct device configuration?

The problem appears to be that the memory map used by the simulator is automatically set up from the linker memory map. If you make direct memory mapped I/O accesses not known to the linker, then it will raise an exception (when this mechanism detects a bug in your code you may be glad of that — it is not a bug in uVision — it is intentional behaviour).

If the MAP command or dialogue did not work for you, Occam’s razor suggest to me that you did not perform the operation correctly. You should map the entire I/O region given in your part’s data sheet or user manual. It may work I suppose if you define the I/O region in the linker scatter file — but that may be getting a bit too complicated.

Источник

Иногда мы сталкиваемся с этой проблемой при моделировании программного обеспечения, используемого Keil 5:

 error 65: access violation at 0x40021000 : no ‘read’ permission

Очень озадачен, аппаратная отладка верна, но он будет неправм при использовании программного отладки.

Давайте представим, как избежать этой ошибки:

1 Откройте проект сначала. Открытие старой версии файла с помощью KEIL5 появится следующим образом, выбрав стрелку, чтобы указать. :

2, а затем настроен как симуляция программного обеспечения:

3 Следующий запуск отладки, она найдет, что одноэтапная отладка всегда находится в Systeminit (), он не придет. :

Я обнаружил, что нижний левый угол на самом деле ошибка:

4 Фактически, keil5 повернет старую версию файла после ошибки. Некоторые конфигурации также требуются, все еще необходимо изменять как на вкладке DEBUG.

Dialog dll изменяется на darmstm.dll

Параметр изменен на -PSTM32F103ZE (этот элемент зависит от конкретной модели)

5 Далее нажмите ОК, чтобы отладить нормально. :