gcc - detection of memory section overflow in ld -


i have microcontroller project using gcc tool chain.

gcc version 4.7.4 20130913 (release) [arm/embedded-4_7-branch revision 202601]

the controller has 512k flash memory. first 64k occupied bootloader , 448k remain project. defined linker script sizes flash , ram. added sections. here excerpt:

memory {   flash (rx)      : origin = 0x00010000, length = 448k   ram (xrw)       : origin = 0x10000000, length = 64k }  sections {   .text :   {     . = align(4);     *(.text)           /* .text sections (code) */   } > flash    .fini_array :   {     provide_hidden (__fini_array_start = .);     keep (*(.fini_array*))     provide_hidden (__fini_array_end = .);     _eflash = .;   } >flash    /* used startup initialize data */   _sidata = .;    .data : @ ( _sidata )   {     *(.data)           /* .data sections */     *(.data*)          /* .data* sections */     _edata = .;        /* define global symbol @ data end */   } >ram }

the linker works fine placing section @ places. problem linker not check if there enough space .data , .data* sections in flash @ location _sidata. resulting output exceeds memory size without warning.

how can adapt linker script ld use initialization data (.data) in size calculation?

edit: there command line option enforce sensible data placement?

this linker malfunction can revealed assert:

  /* used startup initialize data */   _sidata = .;    .data : @ ( _sidata )   {     _sdata = .;     *(.data)           /* .data sections */     *(.data*)          /* .data* sections */     _edata = .;        /* define global symbol @ data end */   } >ram    /* verify initialization data fits in flash */   assert(      (_sidata + (_edata - _sdata)) <= (origin(flash) + length(flash)),      "initialization data blow up") }

Comments

Post a Comment

Popular posts from this blog

apache - Remove .php and add trailing slash in url using htaccess not loading css -

i have add following code htaccess file removing .php extension , add trailing slash urls. worked fine reduced page loading speed , css code not loading @ all. pages ugly. please help rewriteengine on rewritebase / ## hide .php extension snippet # externally redirect /dir/foo.php /dir/foo rewritecond %{the_request} ^[a-z]{3,}\s([^.]+)\.php [nc] rewriterule ^ %1/ [r,l] # add trailing slash rewritecond %{request_filename} !-f rewritecond %{request_uri} !/$ rewriterule . %{request_uri}/ [l,r=301] # internally forward /dir/foo /dir/foo.php rewritecond %{request_filename} !-d rewritecond %{request_filename}.php -f rewriterule ^(.*?)/?$ $1.php [l] we can rewrite urls using .htaccess files. before writing in .htaccess files need verify kind of server using. can check server adding a <?php phpinfo(); ?> in php page. ensure mod_rewrite module enabled in apache server. can identified checking phpinfo included page. common methods used url rewriting follows ...
Read more

javascript - jQuery show full size image on click -

pretty self explanatory not workking . i want display full image when user click on image... yes know there tons of plugins but i want keep simple. any idea ? css : .full { display: none; width: 500px; height: 500px; margin-left: 100px; margin-top: -300px; position: fixed; background-color: #f00; z-index: 6; } .thumbnail { width: 50px; height: 50px; } html: <img class="thumbnail" src="http://4.bp.blogspot.com/-uhbdp2esxng/txneptvi92i/aaaaaaaaaky/upfqis7zto0/s1600/rihanna-wallpaper.jpg"> jquery: $(document).ready(function() { $('.thumbnail').on('click', function() { var img = $('<img />',{src:this.src,'class':'full'}); $('.full').html(img).show(); console.log('done!'); }); }); try looking how jquery works. $(document).ready(function() { $('.thumbnail').on('click', function(...
Read more