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Which sections of a shared library should be loaded in the physical memory?


 
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# 1  
Old 06-11-2010
Which sections of a shared library should be loaded in the physical memory?

Each shared library may contain sections with allocatable flag as below:
Code:
...
.hash
.gnu.hash
.dynsym
.dynstr
.gnu.version
.gnu.version_d
.rel.dyn
.rel.plt
.plt
...

My questions is that: among above sections, which of them should be loaded in the physical memory by run-time linker (ld-2.10.1.so), are they loaded entirely or partially?
Thx!!!
# 2  
Old 06-11-2010
In Linux you can get information on what memory segments are loaded where for a process in /proc/self/maps .
# 3  
Old 06-11-2010
/proc/pid/maps only shows the segments, it doesn't provide what I need.
# 4  
Old 06-11-2010
objdump -h /path/to/library.so will tell you what segments exist in what parts of the file, which you can match up with /proc/self/maps' third column(which is the offset mapped to the file). Because of paging considerations they may not match up precisely.
 

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