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Linker and Libraries Guide

Register Symbols

The SPARC architecture supports register symbols, that is, a symbol that initializes a global register. A symbol table entry for a register symbol contains the following:

Table 7-22 Symbol Table Entry: Register Symbol

Field 

Meaning  

st_name

Index into string table of the name of the symbol, or 0 for a scratch register. 

st_value

Register number. See the ABI manual for integer register assignments. 

st_size

Unused (0). 

st_info

Bind is typically STB_GLOBAL, type must be STT_SPARC_REGISTER. 

st_other

Unused (0). 

st_shndx

SHN_ABS if this object initializes this register symbol; SHN_UNDEF otherwise. 

Table 7-23 SPARC Register Numbers

Name 

Value 

Meaning  

STO_SPARC_REGISTER_G2

0x2 

%g2 

STO_SPARC_REGISTER_G3

0x3 

%g3 

Absence of an entry for a particular global register means that the particular global register is not used at all by the object.