Relocations by default are grouped by the sections against which they are to be applied. However, when an object is built with the -z combreloc option, all but the procedure linkage table relocations are placed into a single common section named .SUNW_reloc. See Procedure Linkage Table (Processor-Specific).
Combining relocation records in this manner enables all RELATIVE relocations to be grouped together. All symbolic relocations are sorted by symbol name. The grouping of RELATIVE relocations permits optimized runtime processing using the DT_RELACOUNT/DT_RELCOUNT .dynamic entries. Sorted symbolic entries help reduce runtime symbol lookup.