Register Symbols

The SPARC architecture supports register symbols, which are symbols that initialize a global register. A symbol table entry for a register symbol contains the entries listed in the following table.

Table 7–26 SPARC: ELF 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.

The register values defined for SPARC are listed in the following table.

Table 7–27 SPARC: ELF 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.