diff options
| -rw-r--r-- | configure.ac | 3 | ||||
| -rw-r--r-- | lib/stubs/syscalls/sys/mman.h | 37 | ||||
| -rw-r--r-- | meson.build | 3 |
3 files changed, 43 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 0a5b0425..416a3240 100644 --- a/configure.ac +++ b/configure.ac @@ -81,6 +81,9 @@ AC_CHECK_FUNCS(timer_create, [], [ ]) AC_SUBST(TIMER_LIBS) +dnl Check for memfd_create +AC_CHECK_FUNCS(memfd_create) + dnl Check for CPUID cpuid="yes" AC_TRY_LINK([ diff --git a/lib/stubs/syscalls/sys/mman.h b/lib/stubs/syscalls/sys/mman.h new file mode 100644 index 00000000..2ac2da6a --- /dev/null +++ b/lib/stubs/syscalls/sys/mman.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: MIT */ + +#pragma once + +#include_next <sys/mman.h> + +#if !defined(HAVE_MEMFD_CREATE) || !HAVE_MEMFD_CREATE +#include <errno.h> +#include <sys/syscall.h> +#include <sys/types.h> +#include <unistd.h> + +#ifndef __NR_memfd_create +#if defined __x86_64__ +#define __NR_memfd_create 319 +#elif defined __i386__ +#define __NR_memfd_create 356 +#elif defined __arm__ +#define __NR_memfd_create 385 +#else +#warning "__NR_memfd_create unknown for your architecture" +#endif +#endif + +static inline int missing_memfd_create(const char *name, unsigned int flags) +{ +#ifdef __NR_memfd_create + return syscall(__NR_memfd_create, name, flags); +#else + errno = ENOSYS; + return -1; +#endif +} + +#define memfd_create missing_memfd_create + +#endif diff --git a/meson.build b/meson.build index 22118828..63ac6292 100644 --- a/meson.build +++ b/meson.build @@ -196,6 +196,9 @@ if cc.has_member('struct sysinfo', 'totalram', config.set('HAVE_STRUCT_SYSINFO_TOTALRAM', 1) endif +have = cc.has_function('memfd_create', prefix : '''#include <sys/mman.h>''', args : '-D_GNU_SOURCE') +config.set10('HAVE_MEMFD_CREATE', have) + add_project_arguments('-D_GNU_SOURCE', language : 'c') add_project_arguments('-include', 'config.h', language : 'c') |