diff options
Diffstat (limited to 'binutils/doc/binutils.texi')
| -rw-r--r-- | binutils/doc/binutils.texi | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/binutils/doc/binutils.texi b/binutils/doc/binutils.texi index 98438f2..a5856b2 100644 --- a/binutils/doc/binutils.texi +++ b/binutils/doc/binutils.texi @@ -745,7 +745,13 @@ object file formats permit more efficient access to small data objects, such as a global int variable as opposed to a large global array. @item i -The symbol is in a section specific to the implementation of DLLs. +For PE format files this indicates that the symbol is in a section +specific to the implementation of DLLs. For ELF format files this +indicates that the symbol is an indirect function. This is a GNU +extension to the standard set of ELF symbol types. It indicates a +symbol which if referenced by a relocation does not evaluate to its +address, but instead must be invoked at runtime. The runtime +execution will then return the value to be used in the relocation. @item N The symbol is a debugging symbol. @@ -768,6 +774,12 @@ The symbol is in the text (code) section. @item U The symbol is undefined. +@item u +The symbol is a unique global symbol. This is a GNU extension to the +standard set of ELF symbol bindings. For such a symbol the dynamic linker +will make sure that in the entire process there is just one symbol with +this name and type in use. + @item V @itemx v The symbol is a weak object. When a weak defined symbol is linked with @@ -2142,11 +2154,16 @@ The flag characters are divided into 7 groups as follows: @table @code @item l @itemx g +@itemx u @itemx ! -The symbol is local (l), global (g), neither (a space) or both (!). A +The symbol is a local (l), global (g), unique global (u), neither +global nor local (a space) or both global and local (!). A symbol can be neither local or global for a variety of reasons, e.g., because it is used for debugging, but it is probably an indication of -a bug if it is ever both local and global. +a bug if it is ever both local and global. Unique global symbols are +a GNU extension to the standard set of ELF symbol bindings. For such +a symbol the dynamic linker will make sure that in the entire process +there is just one symbol with this name and type in use. @item w The symbol is weak (w) or strong (a space). |