diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/darwin.c | 17 |
1 files changed, 4 insertions, 13 deletions
diff --git a/gcc/config/darwin.c b/gcc/config/darwin.c index 36b460a..5d17391 100644 --- a/gcc/config/darwin.c +++ b/gcc/config/darwin.c @@ -3134,25 +3134,16 @@ darwin_file_end (void) /* TODO: Add a language hook for identifying if a decl is a vtable. */ #define DARWIN_VTABLE_P(DECL) 0 -/* Cross-module name binding. - Darwin's dynamic linker supports interposition and lazy symbol binding. - If we are generating PIC code and a symbol is public, then it could - potentially be indirected via a lazy-resolver stub; we cannot tell at - compile-time if this will be done (since the indirection can be the - result of adding a -flat-namespace option at link-time). Here we are - conservative and assume that any such symbol cannot bind locally. - The default implementation for binds_local_p handles undefined, weak and - common symbols which are always indirected. */ +/* Cross-module name binding. Darwin does not support overriding + functions at dynamic-link time, except for vtables in kexts. */ bool darwin_binds_local_p (const_tree decl) { /* We use the "shlib" input to indicate that a symbol should be - considered overridable. Older versions of the kernel also support - interposition for extensions (although this code is a place-holder - until there is an implementation for DARWIN_VTABLE_P). */ + considered overridable; only relevant for vtables in kernel modules + on earlier system versions, and with a TODO to complete. */ bool force_overridable = TARGET_KEXTABI && DARWIN_VTABLE_P (decl); - force_overridable |= MACHOPIC_PURE; return default_binds_local_p_3 (decl, force_overridable /* shlib */, false /* weak dominate */, false /* extern_protected_data */, |