Linker Tasks

Using Linker commands

The useful members of the som_exec_auxhdr structure are:

.exec_tsize Size of text (code) segment.

.exec_tmem Address at which to load the text (already adjusted for offset specified by the -Rlinker option).

.exec_tfile

.exec_dsize

.exec_dmem

.exec_dfile

.exec_bsize

.exec_entry

Offset into file (location) where text segment starts.

Size of data segment.

Address at which to load the data (already adjusted).

Offset into file (location) where data segment starts.

Size of bss segment. It is assumed to start immediately after the data segment.

Address of entry point (if one was specified by the -elinker option).

Step 5: Read the text and data into the allocated space.

Once you know the location of the required segments in the file, you can read them into the area allocated in Step 2.

The location of the text and data segments in the file is defined by the

.exec_tfile and .exec_dfile members of the som_exec_auxhdr structure. The address at which to place the segments in the allocated memory is defined by the .exec_tmem and .exec_dmem members. The size of the segments to read in is defined by the .exec_tsize and

.exec_dsize members.

Step 6: Clear (zero out) the bss segment. The bss segment starts immediately after the data segment. To zero out the bss, find the end of the data segment and use memset (see memory(3C)) to zero out the size of the bss.

The end of the data segment can be determined by adding the

.exec_dmem and .exec_dsize members of the som_exec_auxhdr structure. The bss's size is defined by the .exec_bsize member.

Step 7: Flush the text from the data cache before executing code from the loaded module. Before executing code in the allocated space, a program should flush the instruction and data caches. Although this is really only necessary on systems that have instruction and data caches, it is easiest just to do it on all systems for ease of portability.

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Kenwood HP 9000 manual Read the text and data into the allocated space

HP 9000 specifications

The Kenwood HP 9000 is a cutting-edge home appliance designed for culinary enthusiasts seeking to elevate their cooking experience. This powerful kitchen machine stands out for its multi-functionality, combining the roles of a food processor, blender, and mixer into one sleek unit.

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