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commit b38c9cdb58061d357cdf9bca4f6967d487becb82
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Wed May 4 15:37:21 2022 +0200
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Linux: Define MMAP_CALL_INTERNAL
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Unlike MMAP_CALL, this avoids a TCB dependency for an errno update
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on failure.
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<mmap_internal.h> cannot be included as is on several architectures
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due to the definition of page_unit, so introduce a separate header
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file for the definition of MMAP_CALL and MMAP_CALL_INTERNAL,
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<mmap_call.h>.
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Reviewed-by: Stefan Liebler <stli@linux.ibm.com>
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(cherry picked from commit c1b68685d438373efe64e5f076f4215723004dfb)
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diff --git a/sysdeps/unix/sysv/linux/mmap_call.h b/sysdeps/unix/sysv/linux/mmap_call.h
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new file mode 100644
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index 0000000000000000..3547c99e149e5064
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--- /dev/null
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+++ b/sysdeps/unix/sysv/linux/mmap_call.h
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@@ -0,0 +1,22 @@
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+/* Generic definition of MMAP_CALL and MMAP_CALL_INTERNAL.
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+ Copyright (C) 2017-2022 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <https://www.gnu.org/licenses/>. */
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+
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+#define MMAP_CALL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \
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+ INLINE_SYSCALL_CALL (__nr, __addr, __len, __prot, __flags, __fd, __offset)
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+#define MMAP_CALL_INTERNAL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \
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+ INTERNAL_SYSCALL_CALL (__nr, __addr, __len, __prot, __flags, __fd, __offset)
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diff --git a/sysdeps/unix/sysv/linux/mmap_internal.h b/sysdeps/unix/sysv/linux/mmap_internal.h
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index 5ca6976191137f95..989eb0c7c6b57dc1 100644
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--- a/sysdeps/unix/sysv/linux/mmap_internal.h
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+++ b/sysdeps/unix/sysv/linux/mmap_internal.h
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@@ -40,10 +40,6 @@ static uint64_t page_unit;
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/* Do not accept offset not multiple of page size. */
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#define MMAP_OFF_LOW_MASK (MMAP2_PAGE_UNIT - 1)
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-/* An architecture may override this. */
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-#ifndef MMAP_CALL
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-# define MMAP_CALL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \
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- INLINE_SYSCALL_CALL (__nr, __addr, __len, __prot, __flags, __fd, __offset)
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-#endif
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+#include <mmap_call.h>
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#endif /* MMAP_INTERNAL_LINUX_H */
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diff --git a/sysdeps/unix/sysv/linux/s390/mmap_internal.h b/sysdeps/unix/sysv/linux/s390/mmap_call.h
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similarity index 78%
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rename from sysdeps/unix/sysv/linux/s390/mmap_internal.h
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rename to sysdeps/unix/sysv/linux/s390/mmap_call.h
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index 46f1c3769d6b586a..bdd30cc83764c2c1 100644
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--- a/sysdeps/unix/sysv/linux/s390/mmap_internal.h
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+++ b/sysdeps/unix/sysv/linux/s390/mmap_call.h
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@@ -16,9 +16,6 @@
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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-#ifndef MMAP_S390_INTERNAL_H
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-# define MMAP_S390_INTERNAL_H
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-
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#define MMAP_CALL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \
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({ \
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long int __args[6] = { (long int) (__addr), (long int) (__len), \
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@@ -26,7 +23,10 @@
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(long int) (__fd), (long int) (__offset) }; \
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INLINE_SYSCALL_CALL (__nr, __args); \
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})
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-
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-#include_next <mmap_internal.h>
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-
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-#endif
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+#define MMAP_CALL_INTERNAL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \
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+ ({ \
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+ long int __args[6] = { (long int) (__addr), (long int) (__len), \
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+ (long int) (__prot), (long int) (__flags), \
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+ (long int) (__fd), (long int) (__offset) }; \
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+ INTERNAL_SYSCALL_CALL (__nr, __args); \
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+ })
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