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Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 12a2740..8c0de3b 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -10465,3 +10465,14 @@ to the functions in @file{libgcc} that provide low-level support for call stack unwinding. It is used in declarations in @file{unwind-generic.h} and the associated definitions of those functions. @end defmac + +@deftypefn {Target Hook} {bool} TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS (void) +When optimization is disabled, this hook indicates whether or not +arguments should be allocated to stack slots. Normally, GCC allocates +stacks slots for arguments when not optimizing in order to make +debugging easier. However, when a function is declared with +@code{__attribute__((naked))}, there is no stack frame, and the compiler +cannot safely move arguments from the registers in which they are passed +to the stack. Therefore, this hook should return true in general, but +false for naked functions. The default implementation always returns true. +@end deftypefn |