It's been a while and I hope things are going great for you. If you feel inspired to write more articles on EmbeddedRelated, that would certainly be greatly appreciated. Take care Govind.
Glad to know that I'm an influencer now :P Hope to be able to write more in the future, unfortunately work and other commitments have kept me busy. The first column is the address, the second is the size and the third character denotes where the symbol is located.
In your Java program you just have to parse this output. How to locate code automatically to flash if we have two flash memories with gap between their address space. Eg: I have flash A from memory 0x0 to 0x and flash B from 0x to 0x How i can write linker script that should plcae code section to flash A first, once flash A is full then should locate in flash B.
Sorry for the late reply, I don't seem to have got any notifications for your comments. This is a good question and I'm afraid I don't know if the GNU-LD linker supports automatically re-locating data into different regions. The best bet might be to look at some other projects with a similar processor architecture and see how they do it. Nevermind, I fired up Visual Studio, opened the solution - and it built with no problems. I'm glad you figured it out! I've added pre-built releases now.
I was getting an exception in frmMain. ModuleName ;. I think this caused my stalls and "non reponsivenes". Would there be a possibility to add a custom 4th column where user could put some other section data. Just wandering The file to edit is the frmMain.
Of course you have to provide the data to be filled into the columns. Thanks, it was very useful in retrieving back some precious RAM for my project Thanks for the feedback and the idea, yes adding stack usage especially with call graph information would be quite useful indeed. To post reply to a comment, click on the 'reply' button attached to each comment. To post a new comment not a reply to a comment check out the 'Write a Comment' tab at the top of the comments.
Registering will allow you to participate to the forums on ALL the related sites and give you access to all pdf downloads. Depending on when I'm sampled, I can be a code monkey, a keen student of nothing in particular, a firmware engineer or a wannabe mad scientist. Introduction to Microcontrollers Mike Silva. Arduino Robotics Lonnie Honeycutt. Blogs Govind Mukundan. Software Development Debugging Microcontroller.
Comments Write a Comment Select to add a comment [ - ]. Hi Govind Mukundan, Great topic is discussed here, thanks for sharing. I was developing a java program to plot the internal variables from a dsPIC target. I have the issue of getting adress and length the global symbol which I need to plot will it be helpful to use this tool to understand this.
Is there any easy way to integrate this in java. Thanks Saneesh. Sorry for the late reply, I don't seem to have received any notifications for your comments. The easiest way for you would be to use the "nm" utility provided by microchip along with the dsPIC toolchain. You can run NM with -S option and the.
Thanks Govind, Do you mind sharing your email for any queries. Rgds Saneesh. Hi Govind, Is there an. Hi Danijel, I'm glad you figured it out! Regards G. Thanks for that. I was having some problems where it would stall and crash very often.
ModuleName ; I am not at all sure about this, please check. Thanks for quick reply! Will try it. It's even better if you have the MS symbol server in the path, and if the full page heap was turned on or adplus was running. With ADPlus in particular you will likely have variable values captured as well. You need them rarely, but they can be handy debugging some problems because they give information on the location of functions and data.
Linker maps can be very useful in large projects when you need to track dependencies between compilation units and libraries. Typically, a linker will report a symbol which caused problems, and more often than not, a simple search for this symbol name won't return any results or will return tons of false positives for symbols like read. Without a linker map, the only option you have is to analyze all available source files after preprocessing pass if macros were used, which is typically the case and hope that you find the relevant spot.
I was once working on a project which had to be ported on a system without locale support. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. What's the use of. Ask Question. Asked 12 years, 9 months ago. Active 1 year, 1 month ago. Viewed 63k times. Improve this question.
GNU Gas generates. Add a comment. Active Oldest Votes. A nice article on how to use map files for finding crashes. Like I mentioned above you'll need to use the Closure compiler to minify, concat and generate a source map for your JavaScript files.
The command is as follows:. This is required as the default version is V2 and we only want to work with V3. In order to better understand a source map we'll take a small example of a source map file that would be generated by the Closure compiler and dive into more detail on how the "mappings" section works.
The following example is a slight variation from the V3 spec example. Originally the source map spec had a very verbose output of all the mappings and resulted in the sourcemap being about 10 times the size of the generated code. So how did they reduce the size while still maintaining the complex mappings? The mappings property is a super big string.
Within this string are semicolons ; that represent a line number within the generated file. Within each line there are commas , that represent each segment within that line. Each of these segments is either 1, 4 or 5 in variable length fields. Some may appear longer but these contain continuation bits.
Each segment builds upon the previous, which helps reduce the file size as each bit is relative to its previous segments. Like I mentioned above each segment can be 1, 4 or 5 in variable length. This diagram is considered a variable length of four with one continuation bit g. We'll break down this segment and show you how the source map works out the original location.
The values shown above are purely the Base64 decoded values, there is some more processing to get their true values. Each segment usually works out five things:. Not every segment has a name, method name or argument, so segments throughout will switch between four and five variable length. The g value in the segment diagram above is what's called a continuation bit this allows for further optimisation in the Base64 VLQ decoding stage.
A continuation bit allows you to build on a segment value so you can store big numbers without having to store a big number, a very clever space saving technique that has its roots in the midi format.
The above diagram AAgBC once processed further would return 0, 0, 32, 16, 1 — the 32 being the continuation bit that helps build the following value of B purely decoded in Base64 is 1. So the important values that are used are 0, 0, 16, 1. This then lets us know that line 1 lines are kept count by the semi colons column 0 of the generated file maps to file 0 array of files 0 is foo. You can also look at the WebKit dev tools source mapping code , also written in JavaScript.
In order to properly understand how we get the value 16 from B we need to have a basic understanding of bitwise operators and how the spec works for source mapping. This returns a 1 in each bit position where both have it appear.
This then increases the the bit shift value by 5 for each preceding continuation bit. In the above case its only shifted by 5 once, so left shifting 1 B by 5. So there we have it: that is how you turn 1 into This may seem an over complicated process, but once the numbers start getting bigger it makes more sense.
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