Hi,

I'm committing the attached patch which requirks the ELF loader to 
correct the following problems:

1) Flags in the program header table were being used to determine 
whether an address was part of executable code, however a segment can 
contain more than one section and they may be a mix of executable and 
data sections.

2) The table of segments was static and was simply added to for each 
object file which was loaded. This means that an address was compared 
against all segments of all executables for a simulation of multiple 
cpus with multiple programs.

This patch uses the ELF section table to examine each section 
individually to see if it is executable. The resulting table is also 
divided into sub tables and each loader gets a pointer to the 
appropriate sub-table of sections to examine. Each subtable is 
terminated by an entry of all zeroes.

This patch also removes the hard-coded 100 element limit (which was not 
checked) on the number of segments and executable sections in favour of 
dynamic allocation.

Tested against the internal port which exposed the problem and against 
xstormy16.

Dave