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| author | Iain Sandoe <iain@sandoe.co.uk> | 2024-01-16 10:21:14 +0000 |
|---|---|---|
| committer | Iain Sandoe <iain@sandoe.co.uk> | 2024-01-28 10:59:34 +0000 |
| commit | 837827f8f2542c36ba5944b4da0a76ea6a64b08b (patch) | |
| tree | ac406b504717cf847f7f5543febf30eac96bd885 /gcc/doc | |
| parent | 557bea3d2e13bd8a4a19f494df748f7a384dc649 (diff) | |
| download | gcc-837827f8f2542c36ba5944b4da0a76ea6a64b08b.zip gcc-837827f8f2542c36ba5944b4da0a76ea6a64b08b.tar.gz gcc-837827f8f2542c36ba5944b4da0a76ea6a64b08b.tar.bz2 | |
Fix __builtin_nested_func_ptr_{created,deleted} symbol versions [PR113402]
The symbols for the functions supporting heap-based trampolines were
exported at an incorrect symbol version, the following patch fixes that.
As requested in the PR, this also renames __builtin_nested_func_ptr* to
__gcc_nested_func_ptr*. In carrying our the rename, we move the builtins
to use DEF_EXT_LIB_BUILTIN.
PR libgcc/113402
gcc/ChangeLog:
* builtins.cc (expand_builtin): Handle BUILT_IN_GCC_NESTED_PTR_CREATED
and BUILT_IN_GCC_NESTED_PTR_DELETED.
* builtins.def (BUILT_IN_GCC_NESTED_PTR_CREATED,
BUILT_IN_GCC_NESTED_PTR_DELETED): Make these builtins LIB-EXT and
rename the library fallbacks to __gcc_nested_func_ptr_created and
__gcc_nested_func_ptr_deleted.
* doc/invoke.texi: Rename these to __gcc_nested_func_ptr_created
and __gcc_nested_func_ptr_deleted.
* tree-nested.cc (finalize_nesting_tree_1): Use builtin_explicit for
BUILT_IN_GCC_NESTED_PTR_CREATED and BUILT_IN_GCC_NESTED_PTR_DELETED.
* tree.cc (build_common_builtin_nodes): Build the
BUILT_IN_GCC_NESTED_PTR_CREATED and BUILT_IN_GCC_NESTED_PTR_DELETED local
builtins only for non-explicit.
libgcc/ChangeLog:
* config/aarch64/heap-trampoline.c: Rename
__builtin_nested_func_ptr_created to __gcc_nested_func_ptr_created and
__builtin_nested_func_ptr_deleted to __gcc_nested_func_ptr_deleted.
* config/i386/heap-trampoline.c: Likewise.
* libgcc2.h: Likewise.
* libgcc-std.ver.in (GCC_7.0.0): Likewise and then move
__gcc_nested_func_ptr_created and
__gcc_nested_func_ptr_deleted from this symbol version to ...
(GCC_14.0.0): ... this one.
Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
Co-authored-by: Jakub Jelinek <jakub@redhat.com>
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index f2dee97..819a75d 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -19523,8 +19523,8 @@ for nested functions. By default, trampolines are generated on stack. However, certain platforms (such as the Apple M1) do not permit an executable stack. Compiling with @option{-ftrampoline-impl=heap} generate calls to -@code{__builtin_nested_func_ptr_created} and -@code{__builtin_nested_func_ptr_deleted} in order to allocate and +@code{__gcc_nested_func_ptr_created} and +@code{__gcc_nested_func_ptr_deleted} in order to allocate and deallocate trampoline space on the executable heap. These functions are implemented in libgcc, and will only be provided on specific targets: x86_64 Darwin, x86_64 and aarch64 Linux. @emph{PLEASE NOTE}: Heap |