add memfd_create syscall wrapper

36 files changed, 121 insertions, 2 deletions

diff --git a/libc/sysdeps/linux/aarch64/bits/fcntl.h b/libc/sysdeps/linux/aarch64/bits/fcntl.h
index dbe929351..024344eec 100644
--- a/libc/sysdeps/linux/aarch64/bits/fcntl.h
+++ b/libc/sysdeps/linux/aarch64/bits/fcntl.h
@@ -289,3 +289,6 @@ extern int fallocate64 (int __fd, int __mode, __off64_t __offset,
 #endif	/* use GNU */
 
 __END_DECLS
+
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/alpha/bits/fcntl.h b/libc/sysdeps/linux/alpha/bits/fcntl.h
index 11e68214e..7d06c76b7 100644
--- a/libc/sysdeps/linux/alpha/bits/fcntl.h
+++ b/libc/sysdeps/linux/alpha/bits/fcntl.h
@@ -236,3 +236,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/arc/bits/fcntl.h b/libc/sysdeps/linux/arc/bits/fcntl.h
index beb32e41e..b02849691 100755
--- a/libc/sysdeps/linux/arc/bits/fcntl.h
+++ b/libc/sysdeps/linux/arc/bits/fcntl.h
@@ -230,3 +230,6 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 
 #endif
 __END_DECLS
+
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/arm/bits/fcntl.h b/libc/sysdeps/linux/arm/bits/fcntl.h
index 823660648..52dee4287 100644
--- a/libc/sysdeps/linux/arm/bits/fcntl.h
+++ b/libc/sysdeps/linux/arm/bits/fcntl.h
@@ -244,3 +244,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/avr32/bits/fcntl.h b/libc/sysdeps/linux/avr32/bits/fcntl.h
index ec0a3b55d..9e41550be 100644
--- a/libc/sysdeps/linux/avr32/bits/fcntl.h
+++ b/libc/sysdeps/linux/avr32/bits/fcntl.h
@@ -218,3 +218,6 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 
 __END_DECLS
 #endif
+
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/bfin/bits/fcntl.h b/libc/sysdeps/linux/bfin/bits/fcntl.h
index 0909ae6c4..67d2c5245 100644
--- a/libc/sysdeps/linux/bfin/bits/fcntl.h
+++ b/libc/sysdeps/linux/bfin/bits/fcntl.h
@@ -244,3 +244,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/c6x/bits/fcntl.h b/libc/sysdeps/linux/c6x/bits/fcntl.h
index 14aea565e..00f3b34e0 100644
--- a/libc/sysdeps/linux/c6x/bits/fcntl.h
+++ b/libc/sysdeps/linux/c6x/bits/fcntl.h
@@ -237,3 +237,6 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 
 #endif
 __END_DECLS
+
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/common/Makefile.in b/libc/sysdeps/linux/common/Makefile.in
index 848bc1e4a..83be2691e 100644
--- a/libc/sysdeps/linux/common/Makefile.in
+++ b/libc/sysdeps/linux/common/Makefile.in
@@ -30,6 +30,7 @@ CSRC-$(UCLIBC_LINUX_SPECIFIC) += \
 	inotify.c \
 	ioperm.c \
 	iopl.c \
+	memfd_create.c \
 	modify_ldt.c \
 	module.c \
 	name_to_handle_at.c \
diff --git a/libc/sysdeps/linux/common/bits/fcntl-linux.h b/libc/sysdeps/linux/common/bits/fcntl-linux.h
new file mode 100644
index 000000000..d0236fd8b
--- /dev/null
+++ b/libc/sysdeps/linux/common/bits/fcntl-linux.h
@@ -0,0 +1,34 @@
+/* O_*, F_*, FD_* bit values for Linux.
+   Copyright (C) 2001-2024 Free Software Foundation, Inc.
+
+   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	_FCNTL_H
+# error "Never use <bits/fcntl-linux.h> directly; include <fcntl.h> instead."
+#endif
+
+#ifdef __USE_GNU
+/* Types of seals.  */
+# define F_SEAL_SEAL	0x0001	/* Prevent further seals from being set.  */
+# define F_SEAL_SHRINK	0x0002	/* Prevent file from shrinking.  */
+# define F_SEAL_GROW	0x0004	/* Prevent file from growing.  */
+# define F_SEAL_WRITE	0x0008	/* Prevent writes.  */
+# define F_SEAL_FUTURE_WRITE	0x0010	/* Prevent future writes while
+					   mapped.  */
+# define F_SEAL_EXEC	0x0020	/* Prevent chmod modifying exec bits. */
+
+# define F_ADD_SEALS	1033	/* Add seals to file.  */
+# define F_GET_SEALS	1034	/* Get seals for file.  */
+#endif
diff --git a/libc/sysdeps/linux/common/bits/mman-shared.h b/libc/sysdeps/linux/common/bits/mman-shared.h
index 98c9e1d3c..c40ae2d1e 100644
--- a/libc/sysdeps/linux/common/bits/mman-shared.h
+++ b/libc/sysdeps/linux/common/bits/mman-shared.h
@@ -40,11 +40,9 @@
 
 __BEGIN_DECLS
 
-#if 0
 /* Create a new memory file descriptor.  NAME is a name for debugging.
    FLAGS is a combination of the MFD_* constants.  */
 int memfd_create (const char *__name, unsigned int __flags) __THROW;
-#endif
 
 /* Lock pages from ADDR (inclusive) to ADDR + LENGTH (exclusive) into
    memory.  FLAGS is a combination of the MLOCK_* flags above.  */
diff --git a/libc/sysdeps/linux/common/memfd_create.c b/libc/sysdeps/linux/common/memfd_create.c
new file mode 100644
index 000000000..7165f3278
--- /dev/null
+++ b/libc/sysdeps/linux/common/memfd_create.c
@@ -0,0 +1,13 @@
+/*
+ * memfd_create() for uClibc-ng
+ *
+ * Copyright (C) 2024 Waldemar Brodkorb <wbx@uclibc-ng.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/mman.h>
+#if defined(__NR_memfd_create)
+_syscall2(int, memfd_create, const char *, name, unsigned int, flags)
+#endif
diff --git a/libc/sysdeps/linux/cris/bits/fcntl.h b/libc/sysdeps/linux/cris/bits/fcntl.h
index e9bc90ea9..e1d4ee1a6 100644
--- a/libc/sysdeps/linux/cris/bits/fcntl.h
+++ b/libc/sysdeps/linux/cris/bits/fcntl.h
@@ -245,3 +245,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/csky/bits/fcntl.h b/libc/sysdeps/linux/csky/bits/fcntl.h
index b36f41569..25f4491ba 100644
--- a/libc/sysdeps/linux/csky/bits/fcntl.h
+++ b/libc/sysdeps/linux/csky/bits/fcntl.h
@@ -232,3 +232,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/frv/bits/fcntl.h b/libc/sysdeps/linux/frv/bits/fcntl.h
index 02c8ac310..81a1bcd99 100644
--- a/libc/sysdeps/linux/frv/bits/fcntl.h
+++ b/libc/sysdeps/linux/frv/bits/fcntl.h
@@ -226,3 +226,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/h8300/bits/fcntl.h b/libc/sysdeps/linux/h8300/bits/fcntl.h
index 2062f7cda..7cbe04e15 100644
--- a/libc/sysdeps/linux/h8300/bits/fcntl.h
+++ b/libc/sysdeps/linux/h8300/bits/fcntl.h
@@ -244,3 +244,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/hppa/bits/fcntl.h b/libc/sysdeps/linux/hppa/bits/fcntl.h
index 4ce76ce5f..bcd6618b2 100644
--- a/libc/sysdeps/linux/hppa/bits/fcntl.h
+++ b/libc/sysdeps/linux/hppa/bits/fcntl.h
@@ -234,3 +234,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/i386/bits/fcntl.h b/libc/sysdeps/linux/i386/bits/fcntl.h
index f3c08bbe5..5caf66114 100644
--- a/libc/sysdeps/linux/i386/bits/fcntl.h
+++ b/libc/sysdeps/linux/i386/bits/fcntl.h
@@ -245,3 +245,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/ia64/bits/fcntl.h b/libc/sysdeps/linux/ia64/bits/fcntl.h
index a20f44ff7..53263c3d3 100644
--- a/libc/sysdeps/linux/ia64/bits/fcntl.h
+++ b/libc/sysdeps/linux/ia64/bits/fcntl.h
@@ -238,3 +238,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/kvx/bits/fcntl.h b/libc/sysdeps/linux/kvx/bits/fcntl.h
index ea0c59d09..79cd3f14e 100644
--- a/libc/sysdeps/linux/kvx/bits/fcntl.h
+++ b/libc/sysdeps/linux/kvx/bits/fcntl.h
@@ -227,3 +227,6 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 
 #endif
 __END_DECLS
+
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/lm32/bits/fcntl.h b/libc/sysdeps/linux/lm32/bits/fcntl.h
index 0bfea6e7a..049c7fd83 100644
--- a/libc/sysdeps/linux/lm32/bits/fcntl.h
+++ b/libc/sysdeps/linux/lm32/bits/fcntl.h
@@ -244,3 +244,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/m68k/bits/fcntl.h b/libc/sysdeps/linux/m68k/bits/fcntl.h
index 5a56c8781..92c0964d9 100644
--- a/libc/sysdeps/linux/m68k/bits/fcntl.h
+++ b/libc/sysdeps/linux/m68k/bits/fcntl.h
@@ -244,3 +244,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/metag/bits/fcntl.h b/libc/sysdeps/linux/metag/bits/fcntl.h
index bdd697348..471938b7d 100644
--- a/libc/sysdeps/linux/metag/bits/fcntl.h
+++ b/libc/sysdeps/linux/metag/bits/fcntl.h
@@ -244,3 +244,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/microblaze/bits/fcntl.h b/libc/sysdeps/linux/microblaze/bits/fcntl.h
index 110927d95..8c9c2ceef 100644
--- a/libc/sysdeps/linux/microblaze/bits/fcntl.h
+++ b/libc/sysdeps/linux/microblaze/bits/fcntl.h
@@ -244,3 +244,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/mips/bits/fcntl.h b/libc/sysdeps/linux/mips/bits/fcntl.h
index 33251c74d..a98b8c2e5 100644
--- a/libc/sysdeps/linux/mips/bits/fcntl.h
+++ b/libc/sysdeps/linux/mips/bits/fcntl.h
@@ -268,3 +268,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/nds32/bits/fcntl.h b/libc/sysdeps/linux/nds32/bits/fcntl.h
index 2e6a95ec8..cfce8ab27 100644
--- a/libc/sysdeps/linux/nds32/bits/fcntl.h
+++ b/libc/sysdeps/linux/nds32/bits/fcntl.h
@@ -249,3 +249,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/nios2/bits/fcntl.h b/libc/sysdeps/linux/nios2/bits/fcntl.h
index 200a35443..0c11c3aba 100644
--- a/libc/sysdeps/linux/nios2/bits/fcntl.h
+++ b/libc/sysdeps/linux/nios2/bits/fcntl.h
@@ -244,3 +244,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/or1k/bits/fcntl.h b/libc/sysdeps/linux/or1k/bits/fcntl.h
index c9599ef3a..78eed9d5f 100644
--- a/libc/sysdeps/linux/or1k/bits/fcntl.h
+++ b/libc/sysdeps/linux/or1k/bits/fcntl.h
@@ -244,3 +244,6 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 
 #endif
 __END_DECLS
+
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/powerpc/bits/fcntl.h b/libc/sysdeps/linux/powerpc/bits/fcntl.h
index ef1beeca0..54e4894ec 100644
--- a/libc/sysdeps/linux/powerpc/bits/fcntl.h
+++ b/libc/sysdeps/linux/powerpc/bits/fcntl.h
@@ -245,3 +245,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/riscv32/bits/fcntl.h b/libc/sysdeps/linux/riscv32/bits/fcntl.h
index a9d7c84e0..fdfb1805d 100644
--- a/libc/sysdeps/linux/riscv32/bits/fcntl.h
+++ b/libc/sysdeps/linux/riscv32/bits/fcntl.h
@@ -229,3 +229,6 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 
 #endif
 __END_DECLS
+
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/riscv64/bits/fcntl.h b/libc/sysdeps/linux/riscv64/bits/fcntl.h
index a9d7c84e0..fdfb1805d 100644
--- a/libc/sysdeps/linux/riscv64/bits/fcntl.h
+++ b/libc/sysdeps/linux/riscv64/bits/fcntl.h
@@ -229,3 +229,6 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 
 #endif
 __END_DECLS
+
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/sh/bits/fcntl.h b/libc/sysdeps/linux/sh/bits/fcntl.h
index 0d687f04f..4ae682425 100644
--- a/libc/sysdeps/linux/sh/bits/fcntl.h
+++ b/libc/sysdeps/linux/sh/bits/fcntl.h
@@ -245,3 +245,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/sparc/bits/fcntl.h b/libc/sysdeps/linux/sparc/bits/fcntl.h
index 935495937..35224cdb3 100644
--- a/libc/sysdeps/linux/sparc/bits/fcntl.h
+++ b/libc/sysdeps/linux/sparc/bits/fcntl.h
@@ -252,3 +252,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/sparc64/bits/fcntl.h b/libc/sysdeps/linux/sparc64/bits/fcntl.h
index 395c95baf..00e91a671 100644
--- a/libc/sysdeps/linux/sparc64/bits/fcntl.h
+++ b/libc/sysdeps/linux/sparc64/bits/fcntl.h
@@ -248,3 +248,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/tile/bits/fcntl.h b/libc/sysdeps/linux/tile/bits/fcntl.h
index 818da5c4a..28fda899d 100644
--- a/libc/sysdeps/linux/tile/bits/fcntl.h
+++ b/libc/sysdeps/linux/tile/bits/fcntl.h
@@ -229,3 +229,6 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 
 #endif
 __END_DECLS
+
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/x86_64/bits/fcntl.h b/libc/sysdeps/linux/x86_64/bits/fcntl.h
index 3547a2046..821b2e3cc 100644
--- a/libc/sysdeps/linux/x86_64/bits/fcntl.h
+++ b/libc/sysdeps/linux/x86_64/bits/fcntl.h
@@ -259,3 +259,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>
diff --git a/libc/sysdeps/linux/xtensa/bits/fcntl.h b/libc/sysdeps/linux/xtensa/bits/fcntl.h
index 5af9d2124..9bc5fa893 100644
--- a/libc/sysdeps/linux/xtensa/bits/fcntl.h
+++ b/libc/sysdeps/linux/xtensa/bits/fcntl.h
@@ -245,3 +245,5 @@ extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 #endif
 __END_DECLS
 
+/* Include generic Linux declarations.  */
+#include <bits/fcntl-linux.h>