EmbDev.net

Forum: ARM programming with GCC/GNU tools Integer getting placed at address not divisible by 4


Integer getting placed at address not divisible by 4
von Vinit B. (vinitbidkar)

Rate this post
• ▲ useful
▼ not useful 
Details: i am using Atmel's AT91SAM7X256-EK board

Compiler: IAR 5.11

Problem Summary: An 32 bit structure member int (uint32_t) is getting
placed in the memory at an adress which is not divisible by 4. Hence an
abort execption is getting generated due to misaligned read access.

Do i have to use any compiler setting to avoid this?

According to my knowledge, in an ARM 7 processor, a data type will
always be placed at a memory location which is divisible by the size of
that data type.

Report post Edit Move Thread sperren Anmeldepflicht aktivieren Anpinnen Delete topic Thread mit anderem zusammenführen Quote selected text Reply Reply with quote
Re: Integer getting placed at address not divisible by 4
von Vinit B. (vinitbidkar)

Rate this post
• ▲ useful
▼ not useful 
Vinit Bidkar wrote:
> Details: i am using Atmel's AT91SAM7X256-EK board
>
> Compiler: IAR 5.11
>
> According to my knowledge, in an ARM 7 processor, a data type will
> always be placed at a memory location which is divisible by the size of
> that data type.

Additonal information:

The above mentioned structure pointer is typecasted to an array pointer.
When i create a local instance of the structure then there in problem of
misalignment.

Report post Edit Delete Quote selected text Reply Reply with quote
Re: Integer getting placed at address not divisible by 4
von Vinit B. (vinitbidkar)

Rate this post
• ▲ useful
▼ not useful 
Vinit Bidkar wrote:
> Vinit Bidkar wrote:
>> Details: i am using Atmel's AT91SAM7X256-EK board
>>
>> Compiler: IAR 5.11
>>
>> According to my knowledge, in an ARM 7 processor, a data type will
>> always be placed at a memory location which is divisible by the size of
>> that data type.
>
> Additonal information:
>
> The above mentioned structure pointer is typecasted to an array pointer.
> When i create a local instance of the structure then there in problem of
> misalignment.

Typo
When i create a local instance of the structure then there no problem of
misalignment.

Report post Edit Delete Quote selected text Reply Reply with quote
Watch this topic | Disable multi-page view
Please log in before posting. Registration is free and takes only a minute.
Existing account
Do you have a Google/GoogleMail account? No registration required!
Log in with Google account
No account? Register here.