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2290cf73cc
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>
33 lines
1.2 KiB
C
33 lines
1.2 KiB
C
#ifndef _CLONE_INTERNAL_H
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#define _CLONE_INTERNAL_H
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#include <clone3.h>
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/* The clone3 syscall provides a superset of the functionality of the clone
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interface. The kernel might extend __CL_ARGS struct in the future, with
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each version with a diffent __SIZE. If the child is created, it will
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start __FUNC function with __ARG arguments.
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Different than kernel, the implementation also returns EINVAL for an
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invalid NULL __CL_ARGS or __FUNC (similar to __clone).
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All callers are responsible for correctly aligning the stack. The stack is
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not aligned prior to the syscall (this differs from the exported __clone).
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This function is only implemented if the ABI defines HAVE_CLONE3_WRAPPER.
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*/
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extern int __clone3 (struct clone_args *__cl_args, size_t __size,
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int (*__func) (void *__arg), void *__arg);
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/* The internal wrapper of clone/clone2 and clone3. Different than __clone3,
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it will align the stack if required. If __clone3 returns -1 with ENOSYS,
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fall back to clone or clone2. */
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extern int __clone_internal (struct clone_args *__cl_args,
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int (*__func) (void *__arg), void *__arg);
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#ifndef _ISOMAC
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libc_hidden_proto (__clone3)
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libc_hidden_proto (__clone_internal)
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#endif
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#endif
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