122 lines
3.7 KiB
Diff
122 lines
3.7 KiB
Diff
commit de8995a2a04163617c1a233b4b81356ef9f9741f
|
|
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
|
|
Date: Wed Mar 10 12:26:30 2021 -0300
|
|
|
|
support: Add xclone
|
|
|
|
It is a wrapper for Linux clone syscall, to simplify the call to the
|
|
use only the most common arguments and remove architecture specific
|
|
handling (such as ia64 different name and signature).
|
|
|
|
# Conflicts:
|
|
# support/Makefile
|
|
|
|
diff --git a/support/Makefile b/support/Makefile
|
|
index fb95a69ed9158e78..d2b95539403e416c 100644
|
|
--- a/support/Makefile
|
|
+++ b/support/Makefile
|
|
@@ -84,6 +84,7 @@ libsupport-routines = \
|
|
xcalloc \
|
|
xchdir \
|
|
xchroot \
|
|
+ xclone \
|
|
xclose \
|
|
xconnect \
|
|
xcopy_file_range \
|
|
diff --git a/support/xclone.c b/support/xclone.c
|
|
new file mode 100644
|
|
index 0000000000000000..924d2b875402a819
|
|
--- /dev/null
|
|
+++ b/support/xclone.c
|
|
@@ -0,0 +1,50 @@
|
|
+/* Auxiliary functions to issue the clone syscall.
|
|
+ Copyright (C) 2021 Free Software Foundation, Inc.
|
|
+ This file is part of the GNU C Library.
|
|
+
|
|
+ The GNU C Library is free software; you can redistribute it and/or
|
|
+ modify it under the terms of the GNU Lesser General Public
|
|
+ License as published by the Free Software Foundation; either
|
|
+ version 2.1 of the License, or (at your option) any later version.
|
|
+
|
|
+ The GNU C Library is distributed in the hope that it will be useful,
|
|
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
+ Lesser General Public License for more details.
|
|
+
|
|
+ You should have received a copy of the GNU Lesser General Public
|
|
+ License along with the GNU C Library; if not, see
|
|
+ <https://www.gnu.org/licenses/>. */
|
|
+
|
|
+#ifdef __linux__
|
|
+# include <support/check.h>
|
|
+# include <stackinfo.h> /* For _STACK_GROWS_{UP,DOWN}. */
|
|
+# include <xsched.h>
|
|
+
|
|
+pid_t
|
|
+xclone (int (*fn) (void *arg), void *arg, void *stack, size_t stack_size,
|
|
+ int flags)
|
|
+{
|
|
+ pid_t r = -1;
|
|
+
|
|
+# ifdef __ia64__
|
|
+ extern int __clone2 (int (*fn) (void *arg), void *stack, size_t stack_size,
|
|
+ int flags, void *arg, ...);
|
|
+ r = __clone2 (f, stack, stack_size, flags, arg, /* ptid */ NULL,
|
|
+ /* tls */ NULL, /* ctid */ ctid);
|
|
+# else
|
|
+# if _STACK_GROWS_DOWN
|
|
+ r = clone (fn, stack + stack_size, flags, arg, /* ptid */ NULL,
|
|
+ /* tls */ NULL, /* ctid */ NULL);
|
|
+# elif _STACK_GROWS_UP
|
|
+ r = clone (fn, stack, flags, arg, /* ptid */ NULL, /* tls */ NULL,
|
|
+ &ctid);
|
|
+# endif
|
|
+# endif
|
|
+
|
|
+ if (r < 0)
|
|
+ FAIL_EXIT1 ("clone: %m");
|
|
+
|
|
+ return r;
|
|
+}
|
|
+#endif
|
|
diff --git a/support/xsched.h b/support/xsched.h
|
|
new file mode 100644
|
|
index 0000000000000000..eefd731940187b39
|
|
--- /dev/null
|
|
+++ b/support/xsched.h
|
|
@@ -0,0 +1,34 @@
|
|
+/* Wrapper for sched.h functions.
|
|
+ Copyright (C) 2021 Free Software Foundation, Inc.
|
|
+ This file is part of the GNU C Library.
|
|
+
|
|
+ The GNU C Library is free software; you can redistribute it and/or
|
|
+ modify it under the terms of the GNU Lesser General Public
|
|
+ License as published by the Free Software Foundation; either
|
|
+ version 2.1 of the License, or (at your option) any later version.
|
|
+
|
|
+ The GNU C Library is distributed in the hope that it will be useful,
|
|
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
+ Lesser General Public License for more details.
|
|
+
|
|
+ You should have received a copy of the GNU Lesser General Public
|
|
+ License along with the GNU C Library; if not, see
|
|
+ <https://www.gnu.org/licenses/>. */
|
|
+
|
|
+#ifndef SUPPORT_XSCHED_H
|
|
+#define SUPPORT_XSCHED_H
|
|
+
|
|
+__BEGIN_DECLS
|
|
+
|
|
+#include <sched.h>
|
|
+#include <sys/types.h>
|
|
+
|
|
+#ifdef __linux__
|
|
+pid_t xclone (int (*fn) (void *arg), void *arg, void *stack,
|
|
+ size_t stack_size, int flags);
|
|
+#endif
|
|
+
|
|
+__END_DECLS
|
|
+
|
|
+#endif
|