Would'nt the "static" keyword take care of that? Is it that you want to know where the variable resides, or simply to make sure the memory space is not overlaid with another variable?
Didier -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Monday, August 18, 2008 10:09 AM To: sdcc-user@lists.sourceforge.net Subject: [Sdcc-user] laying out memory i've recently discovered sdcc's (highly unusual :-) trick of letting two variables overlap, without much in the way of user warning. i have variables in xdata on an 8051 that need to be "locked down" with something like: unsigned char at GLOBAL_V_LOCATION+0x86 FooBar; it turns out that sdcc will happily reuse that location for its own purposes, as documented (thanks to frieder for pointing this out): "Thus it is left to the programmer to make sure there are no overlaps with other variables that are declared without the absolute address." (took me quite a while to find this -- i consider this a bug in the linker. at the least, the docs should have a more prominent "WARNING" at that point.) the obvious workaround is to tell the linker that xdata lives in a region not used by my "locked down" variables. however, i really need to tell it about two separate sections -- the space in between needs to be locked down for "legacy" reasons. (i can probably change this, but i'd much rather not.) so i'd like to do something like: $(LD) --xram-loc-1 0xf400 --xram-size-1 256 --xram-loc-2 0xf800 \ --xram-size-2 256 is the sdcc linker capable of this? paul =--------------------- paul fox, [EMAIL PROTECTED] ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
