1 files changed, 69 insertions, 0 deletions
diff --git a/ipc/chromium/src/base/linux_memfd_defs.h b/ipc/chromium/src/base/linux_memfd_defs.h
new file mode 100644
index 0000000000..f5b0de1de8
--- /dev/null
+++ b/ipc/chromium/src/base/linux_memfd_defs.h
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+#ifndef BASE_LINUX_MEMFD_DEFS_H
+#define BASE_LINUX_MEMFD_DEFS_H
+
+#include <sys/syscall.h>
+
+// glibc before 2.27 didn't have a memfd_create wrapper, and if the
+// build system is old enough then it won't have the syscall number
+// and various related constants either.
+
+#if defined(__x86_64__)
+#  define MEMFD_CREATE_NR 319
+#elif defined(__i386__)
+#  define MEMFD_CREATE_NR 356
+#elif defined(__aarch64__)
+#  define MEMFD_CREATE_NR 279
+#elif defined(__arm__)
+#  define MEMFD_CREATE_NR 385
+#elif defined(__powerpc__)
+#  define MEMFD_CREATE_NR 360
+#elif defined(__s390__)
+#  define MEMFD_CREATE_NR 350
+#elif defined(__mips__)
+#  include <sgidefs.h>
+#  if _MIPS_SIM == _MIPS_SIM_ABI32
+#    define MEMFD_CREATE_NR 4354
+#  elif _MIPS_SIM == _MIPS_SIM_ABI64
+#    define MEMFD_CREATE_NR 5314
+#  elif _MIPS_SIM == _MIPS_SIM_NABI32
+#    define MEMFD_CREATE_NR 6318
+#  endif  // mips subarch
+#endif    // arch
+
+#ifdef MEMFD_CREATE_NR
+#  ifdef SYS_memfd_create
+static_assert(MEMFD_CREATE_NR == SYS_memfd_create,
+              "MEMFD_CREATE_NR should match the actual SYS_memfd_create value");
+#  else  // defined here but not in system headers
+#    define SYS_memfd_create MEMFD_CREATE_NR
+#  endif
+#endif
+
+#ifndef MFD_CLOEXEC
+#  define MFD_CLOEXEC 0x0001U
+#  define MFD_ALLOW_SEALING 0x0002U
+#endif
+
+#ifndef F_ADD_SEALS
+#  ifndef F_LINUX_SPECIFIC_BASE
+#    define F_LINUX_SPECIFIC_BASE 1024
+#  endif
+#  define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
+#  define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
+#  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 */
+#endif
+
+#ifndef F_SEAL_FUTURE_WRITE
+#  define F_SEAL_FUTURE_WRITE 0x0010
+#endif
+
+#endif  // BASE_LINUX_MEMFD_DEFS_H