diff options
Diffstat (limited to 'ld/ld.texinfo')
| -rw-r--r-- | ld/ld.texinfo | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/ld/ld.texinfo b/ld/ld.texinfo index 94d340c..c89915f 100644 --- a/ld/ld.texinfo +++ b/ld/ld.texinfo @@ -7635,7 +7635,7 @@ chain since there is never any need to do so on a PLT call. @kindex --plt-thread-safe @kindex --no-plt-thread-safe @item --plt-thread-safe -@itemx --no-thread-safe +@itemx --no-plt-thread-safe With power7's weakly ordered memory model, it is possible when using lazy binding for ld.so to update a plt entry in one thread and have another thread see the individual plt entry words update in the wrong @@ -7646,6 +7646,15 @@ looks for calls to commonly used functions that create threads, and if seen, adds the necessary barriers. Use these options to change the default behaviour. +@cindex PowerPC64 PLT call stub speculative execution barrier +@kindex --speculate-indirect-jumps +@kindex --no-speculate-indirect-jumps +@item --speculate-indirect-jumps +@itemx --no-speculate-indirect-jumps +Use these options to control whether all indirect branch instructions +emitted by @code{ld}, such as those in the PLT, have a speculative +execution barrier to mitigate Spectre variant 2 attacks. + @cindex PowerPC64 ELFv2 PLT localentry optimization @kindex --plt-localentry @kindex --no-plt-localentry |