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| author | Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> | 2023-01-12 10:58:50 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-02-01 08:42:11 -0300 |
| commit | 2290cf73cce1292d9345a8183fd29ae3994a9481 (patch) | |
| tree | 293c1361e50d8fc4c6b22c57d35f51521a5c3d83 /include/clone_internal.h | |
| parent | 2fe58919a0bfd1064c59120520116237ba818ed3 (diff) | |
| download | glibc-2290cf73cce1292d9345a8183fd29ae3994a9481.tar.gz glibc-2290cf73cce1292d9345a8183fd29ae3994a9481.tar.xz glibc-2290cf73cce1292d9345a8183fd29ae3994a9481.zip | |
Linux: Do not align the stack for __clone3
All internal callers of __clone3 should provide an already aligned stack. Removing the stack alignment in __clone3 is a net gain: it simplifies the internal function contract (mask/unmask signals) along with the arch-specific code. Checked on x86_64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'include/clone_internal.h')
| -rw-r--r-- | include/clone_internal.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/clone_internal.h b/include/clone_internal.h index 73b8114df4..f8198d8059 100644 --- a/include/clone_internal.h +++ b/include/clone_internal.h @@ -11,6 +11,9 @@ Different than kernel, the implementation also returns EINVAL for an invalid NULL __CL_ARGS or __FUNC (similar to __clone). + All callers are responsible for correctly aligning the stack. The stack is + not aligned prior to the syscall (this differs from the exported __clone). + This function is only implemented if the ABI defines HAVE_CLONE3_WRAPPER. */ extern int __clone3 (struct clone_args *__cl_args, size_t __size, |