Note that ‘ --stub-group-size ’ does not split input sections. A single input section larger than the group size specified will of course create a larger group (of one section). If input sections are too large, it may not be possible for a branch to reach its stub.
__tls_get_addrfor 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.
.opdsection entries corresponding to deleted link-once functions, or functions removed by the action of ‘ --gc-sections ’ or linker script
/DISCARD/. Use this option to disable
.opdentries spaced 16 bytes apart, overlapping the third word, the static chain pointer (unused in C) with the first word of the next entry. This option expands such entries to the full 24 bytes.
.tocsection entries. Such entries are detected by examining relocations that reference the TOC in code sections. A reloc in a deleted code section marks a TOC word as unneeded, while a reloc in a kept code section marks a TOC word as needed. Since the TOC may reference itself, TOC relocs are also examined. TOC words marked as both needed and unneeded will of course be kept. TOC words without any referencing reloc are assumed to be part of a multi-word entry, and are kept or discarded as per the nearest marked preceding word. This works reliably for compiler generated code, but may be incorrect if assembly code is used to insert TOC entries. Use this option to disable the optimization.
-mcmodel=large, PowerPC64 GCC generates code for a TOC model where TOC entries are accessed with a 16-bit offset from r2. This limits the total TOC size to 64K. PowerPC64 ld extends this limit by grouping code sections such that each group uses less than 64K for its TOC entries, then inserts r2 adjusting stubs between inter-group calls. ld does not split apart input sections, so cannot help if a single input file has a
.tocsection that exceeds 64K, most likely from linking multiple files with ld -r . Use this option to turn off this feature.
.finiare placed first, followed by TOC sections referenced by code generated with PowerPC64 gcc's
-mcmodel=small, and lastly TOC sections referenced only by code generated with PowerPC64 gcc's
-mcmodel=largeoptions. Doing this results in better TOC grouping for multi-TOC. Use this option to turn off this feature.
--plt-align=. A negative value may be specified to pad PLT call stubs so that they do not cross the specified power of two boundary (or the minimum number of boundaries if a PLT stub is so large that it must cross a boundary). By default PLT call stubs are aligned to 32-byte boundaries.
lddefaults to not loading the static chain since there is never any need to do so on a PLT call.
ldlooks for calls to commonly used functions that create threads, and if seen, adds the necessary barriers. Use these options to change the default behaviour.