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> > > > I have a special problem that has to do with the linker > script. In my > > application i want to add a CRC value to the binary image so that i > > can check the code segment for errors during runtime. I > cannot put the > > CRC over the entire image since some segment are changing during > > execution so instead i want to calculate it based on the > text segment > > only. However, the segment is of different size each time i > link which > > means that i have to communicate the size to the CRC calcualtion > > routine. I think that it should be done in the linker script by > > something like > > this: > > > > .text 0x5000 : { _stext = .; *(.text*) *(.gnu.warning) > > *(.gnu.linkonce*) *(.init) } > ram _etext = .; PROVIDE > > > > The text segment specifies where the end is in the variable _etext. > > > > I need the above value to be place on a fixed location by something > > like > > this: > > > > .TextEnd 0x004DFFFC : { etext } > > > > The above dones work but can any see a way for this to work? > > The address of _etext should be a global symbol that you can > access directly in your 'C' program. You need to add a definition like > > extern char _etext > > And then you can take the address of it > > I.e. > > ptEndOfText = &e_test; > I think you misunderstod my problem here. It is not a c program that shall access this variable, i want the value of etext to be place on a fixed adress of the binary image. This is because a let another program interpret the binary image and calcualte a checksum on it i.e i need to know the value of etext data without running the program. Regards, Daniel Lidsten ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com
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