diff options
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 9a21777..93d87cc 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -709,7 +709,7 @@ Objective-C and Objective-C++ Dialects}. -mbranch-cost=@var{num} -mbranch-likely -mno-branch-likely @gol -mfp-exceptions -mno-fp-exceptions @gol -mvr4130-align -mno-vr4130-align -msynci -mno-synci @gol --mrelax-pic-calls -mno-relax-pic-calls} +-mrelax-pic-calls -mno-relax-pic-calls -mmcount-ra-address} @emph{MMIX Options} @gccoptlist{-mlibfuncs -mno-libfuncs -mepsilon -mno-epsilon -mabi=gnu @gol @@ -14208,6 +14208,27 @@ an assembler and a linker that supports the @code{.reloc} assembly directive and @code{-mexplicit-relocs} is in effect. With @code{-mno-explicit-relocs}, this optimization can be performed by the assembler and the linker alone without help from the compiler. + +@item -mmcount-ra-address +@itemx -mno-mcount-ra-address +@opindex mmcount-ra-address +@opindex mno-mcount-ra-address +Emit (do not emit) code that allows @code{_mcount} to modify the +colling function's return address. When enabled, this option extends +the usual @code{_mcount} interface with a new @var{ra-address} +parameter, which has type @code{intptr_t *} and is passed in register +@code{$12}. @code{_mcount} can then modify the return address by +doing both of the following: +@itemize +@item +Returning the new address in register @code{$31}. +@item +Storing the new address in @code{*@var{ra-address}}, +if @var{ra-address} is nonnull. +@end itemize + +The default is @option{-mno-mcount-ra-address}. + @end table @node MMIX Options |