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Linker and Libraries Guide

SPARC: Local Executable (LE)

This code sequence implements the LE model described in Thread-Local Storage Access Models.

Table 8–6 SPARC: Local Executable Thread-Local Variable Access Codes

Code Sequence

Initial Relocations

Symbol 

# %g7 - thread pointer

0x00 sethi %hix(@tpoff(x)), %o0
0x04 xor   %o0,%lo(@tpoff(x)),%o0
0x08 add   %g7, %o0, %o0
 
# %o0 - contains address of TLS variable
 
 
 
R_SPARC_TLS_LE_HIX22
R_SPARC_TLS_LE_LOX10
<none>
 
 
 
x
x

The sethi and xor instructions generate R_SPARC_TLS_LE_HIX22 and R_SPARC_TLS_LE_LOX10 relocations respectively. The link-editor binds these relocations directly to the static TLS offset for the symbol defined in the executable. No relocation processing is required at runtime.