Databases
StackOverflow2013
Postsdbo
POManipulating binary C struct data off line
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POManipulating binary C struct data off line
    primarykey
    data
    text
    <p>I have a practical problem to solve. In an embedded system I'm working on, I have a pretty large structure holding system parameters, which includes int, float, and other structures. The structure can be saved to external storage. </p> <p>I'm thinking of writing a PC software to change certain values inside the binary structure without changing the overall layout of the file. The idea is that one can change 1 or 2 parameter and load it back into memory from external storage. So it's a special purpose hex editor.</p> <p>The way I figures it: if I can construct a table that contains: - parameter name - offset of the parameter in memory - type I should be able to change anything I want. </p> <p>My problem is that it doesn't look too easy to figure out offset of each parameter programmatically. One can always manually to printf their addresses but I'd like to avoid that.</p> <p>Anybody know a tool that can be of help? </p> <p><strong>EDIT</strong> The system in question is 32 ARM based running in little endian mode. Compiler isn't asked to pack the structure so for my purpose it's the same as a x86 PC. The problem is the size of the structure: it contains no less than 1000 parameters in total, spreading across multiple level of nested structures. So it's not feasible (or rather i'm not willing to) to write a <em>short</em> piece of code to dump all the offsets. I guess the key problem is parsing the C headers and automatically generate offsets or code to dump their offsets. Please suggest such a parsing tool. </p> <p>Thanks</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USlang2
    1. USlang2
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload