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add memfd_create syscall wrapper 

memfd_create was added in linux v3.17 and glibc has api for it.
This commit is contained in:
Szabolcs Nagy 2018-06-19 20:28:03 +00:00 committed by Rich Felker
parent b64d66d0b0
commit 38f2fa3d02
2 changed files with 13 additions and 0 deletions
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5
include/sys/mman.h
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@ -99,6 +99,10 @@ extern "C" {
#define MREMAP_FIXED 2 #define MREMAP_FIXED 2
#define MLOCK_ONFAULT 0x01 #define MLOCK_ONFAULT 0x01
#define MFD_CLOEXEC 0x0001U
#define MFD_ALLOW_SEALING 0x0002U
#define MFD_HUGETLB 0x0004U
#endif #endif
#include <bits/mman.h> #include <bits/mman.h>
@ -119,6 +123,7 @@ int munlockall (void);
#ifdef _GNU_SOURCE #ifdef _GNU_SOURCE
void *mremap (void *, size_t, size_t, int, ...); void *mremap (void *, size_t, size_t, int, ...);
int remap_file_pages (void *, size_t, int, size_t, int); int remap_file_pages (void *, size_t, int, size_t, int);
int memfd_create (const char *, unsigned);
int mlock2 (const void *, size_t, unsigned); int mlock2 (const void *, size_t, unsigned);
#endif #endif

8
src/linux/memfd_create.c Normal file
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@ -0,0 +1,8 @@
#define _GNU_SOURCE 1
#include <sys/mman.h>
#include "syscall.h"
int memfd_create(const char *name, unsigned flags)
{
return syscall(SYS_memfd_create, name, flags);
}