diff options
Diffstat (limited to 'ld/ld.texinfo')
| -rw-r--r-- | ld/ld.texinfo | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/ld/ld.texinfo b/ld/ld.texinfo index be1d490..57f1730 100644 --- a/ld/ld.texinfo +++ b/ld/ld.texinfo @@ -7133,6 +7133,21 @@ PowerPC64 @command{ld} normally performs some optimization of code sequences used to access Thread-Local Storage. Use this option to disable the optimization. +@cindex PowerPC64 __tls_get_addr optimization +@kindex --tls-get-addr-optimize +@kindex --no-tls-get-addr-optimize +@item --tls-get-addr-optimize, --no-tls-get-addr-optimize +These options control whether PowerPC64 @command{ld} uses a special +stub to call __tls_get_addr. PowerPC64 glibc 2.22 and later support +an optimization that allows the second and subsequent calls to +@code{__tls_get_addr} for a given symbol to be resolved by the special +stub without calling in to glibc. By default the linker enables this +option when glibc advertises the availability of __tls_get_addr_opt. +Forcing this option on when using an older glibc won't do much besides +slow down your applications, but may be useful if linking an +application against an older glibc with the expectation that it will +normally be used on systems having a newer glibc. + @cindex PowerPC64 OPD optimization @kindex --no-opd-optimize @item --no-opd-optimize |