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Linker and Libraries Guide Oracle Solaris 10 1/13 Information Library |
Part I Using the Link-Editor and Runtime Linker
1. Introduction to the Oracle Solaris Link Editors
5. Link-Editor Quick Reference
7. Building Objects to Optimize System Performance
10. Establishing Dependencies with Dynamic String Tokens
Part IV ELF Application Binary Interface
64-bit SPARC: Relocation Types
Symbol Table Layout and Conventions
13. Program Loading and Dynamic Linking
A. Linker and Libraries Updates and New Features
The syminfo section contains multiple entries of the type Elf32_Syminfo or Elf64_Syminfo. The .SUNW_syminfo section contains one entry for every entry in the associated symbol table (sh_link).
If this section is present in an object, additional symbol information is to be found by taking the symbol index from the associated symbol table and using that to find the corresponding Elf32_Syminfo entry or Elf64_Syminfo entry in this section. The associated symbol table and the Syminfo table will always have the same number of entries.
Index 0 is used to store the current version of the Syminfo table, which is SYMINFO_CURRENT. Since symbol table entry 0 is always reserved for the UNDEF symbol table entry, this usage does not pose any conflicts.
An Syminfo entry has the following format. See sys/link.h.
typedef struct { Elf32_Half si_boundto; Elf32_Half si_flags; } Elf32_Syminfo; typedef struct { Elf64_Half si_boundto; Elf64_Half si_flags; } Elf64_Syminfo;
An index to an entry in the .dynamic section, identified by the sh_info field, which augments the Syminfo flags. For example, a DT_NEEDED entry identifies a dynamic object associated with the Syminfo entry. The entries that follow are reserved values for si_boundto.
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This bit-field can have flags set, as shown in the following table.
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