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-rw-r--r--src/basic/missing_syscall.h648
1 files changed, 648 insertions, 0 deletions
diff --git a/src/basic/missing_syscall.h b/src/basic/missing_syscall.h
new file mode 100644
index 0000000..d54e59f
--- /dev/null
+++ b/src/basic/missing_syscall.h
@@ -0,0 +1,648 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+/* Missing glibc definitions to access certain kernel APIs */
+
+#include <errno.h>
+#include <fcntl.h>
+#if HAVE_LINUX_TIME_TYPES_H
+/* This header defines __kernel_timespec for us, but is only available since Linux 5.1, hence conditionally
+ * include this. */
+#include <linux/time_types.h>
+#endif
+#include <signal.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#ifdef ARCH_MIPS
+#include <asm/sgidefs.h>
+#endif
+
+#include "macro.h"
+#include "missing_keyctl.h"
+#include "missing_stat.h"
+#include "missing_syscall_def.h"
+
+/* linux/kcmp.h */
+#ifndef KCMP_FILE /* 3f4994cfc15f38a3159c6e3a4b3ab2e1481a6b02 (3.19) */
+#define KCMP_FILE 0
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_PIVOT_ROOT
+static inline int missing_pivot_root(const char *new_root, const char *put_old) {
+ return syscall(__NR_pivot_root, new_root, put_old);
+}
+
+# define pivot_root missing_pivot_root
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_IOPRIO_GET
+static inline int missing_ioprio_get(int which, int who) {
+ return syscall(__NR_ioprio_get, which, who);
+}
+
+# define ioprio_get missing_ioprio_get
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_IOPRIO_SET
+static inline int missing_ioprio_set(int which, int who, int ioprio) {
+ return syscall(__NR_ioprio_set, which, who, ioprio);
+}
+
+# define ioprio_set missing_ioprio_set
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_MEMFD_CREATE
+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
+
+/* ======================================================================= */
+
+#if !HAVE_GETRANDOM
+/* glibc says getrandom() returns ssize_t */
+static inline ssize_t missing_getrandom(void *buffer, size_t count, unsigned flags) {
+# ifdef __NR_getrandom
+ return syscall(__NR_getrandom, buffer, count, flags);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define getrandom missing_getrandom
+#endif
+
+/* ======================================================================= */
+
+/* The syscall has been defined since forever, but the glibc wrapper was missing. */
+#if !HAVE_GETTID
+static inline pid_t missing_gettid(void) {
+# if defined __NR_gettid && __NR_gettid >= 0
+ return (pid_t) syscall(__NR_gettid);
+# else
+# error "__NR_gettid not defined"
+# endif
+}
+
+# define gettid missing_gettid
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_NAME_TO_HANDLE_AT
+struct file_handle {
+ unsigned int handle_bytes;
+ int handle_type;
+ unsigned char f_handle[0];
+};
+
+static inline int missing_name_to_handle_at(int fd, const char *name, struct file_handle *handle, int *mnt_id, int flags) {
+# ifdef __NR_name_to_handle_at
+ return syscall(__NR_name_to_handle_at, fd, name, handle, mnt_id, flags);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define name_to_handle_at missing_name_to_handle_at
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_SETNS
+static inline int missing_setns(int fd, int nstype) {
+# ifdef __NR_setns
+ return syscall(__NR_setns, fd, nstype);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define setns missing_setns
+#endif
+
+/* ======================================================================= */
+
+static inline pid_t raw_getpid(void) {
+#if defined(__alpha__)
+ return (pid_t) syscall(__NR_getxpid);
+#else
+ return (pid_t) syscall(__NR_getpid);
+#endif
+}
+
+/* ======================================================================= */
+
+#if !HAVE_RENAMEAT2
+static inline int missing_renameat2(int oldfd, const char *oldname, int newfd, const char *newname, unsigned flags) {
+# ifdef __NR_renameat2
+ return syscall(__NR_renameat2, oldfd, oldname, newfd, newname, flags);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define renameat2 missing_renameat2
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_KCMP
+static inline int missing_kcmp(pid_t pid1, pid_t pid2, int type, unsigned long idx1, unsigned long idx2) {
+# if defined __NR_kcmp && __NR_kcmp >= 0
+ return syscall(__NR_kcmp, pid1, pid2, type, idx1, idx2);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define kcmp missing_kcmp
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_KEYCTL
+static inline long missing_keyctl(int cmd, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5) {
+# if defined __NR_keyctl && __NR_keyctl >= 0
+ return syscall(__NR_keyctl, cmd, arg2, arg3, arg4, arg5);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+
+# define keyctl missing_keyctl
+}
+
+static inline key_serial_t missing_add_key(const char *type, const char *description, const void *payload, size_t plen, key_serial_t ringid) {
+# if defined __NR_add_key && __NR_add_key >= 0
+ return syscall(__NR_add_key, type, description, payload, plen, ringid);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+
+# define add_key missing_add_key
+}
+
+static inline key_serial_t missing_request_key(const char *type, const char *description, const char * callout_info, key_serial_t destringid) {
+# if defined __NR_request_key && __NR_request_key >= 0
+ return syscall(__NR_request_key, type, description, callout_info, destringid);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+
+# define request_key missing_request_key
+}
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_COPY_FILE_RANGE
+static inline ssize_t missing_copy_file_range(int fd_in, loff_t *off_in,
+ int fd_out, loff_t *off_out,
+ size_t len,
+ unsigned int flags) {
+# ifdef __NR_copy_file_range
+ return syscall(__NR_copy_file_range, fd_in, off_in, fd_out, off_out, len, flags);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define copy_file_range missing_copy_file_range
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_BPF
+union bpf_attr;
+
+static inline int missing_bpf(int cmd, union bpf_attr *attr, size_t size) {
+#ifdef __NR_bpf
+ return (int) syscall(__NR_bpf, cmd, attr, size);
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+# define bpf missing_bpf
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_STATX
+struct statx;
+
+static inline ssize_t missing_statx(int dfd, const char *filename, unsigned flags, unsigned int mask, struct statx *buffer) {
+# ifdef __NR_statx
+ return syscall(__NR_statx, dfd, filename, flags, mask, buffer);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+#endif
+
+/* This typedef is supposed to be always defined. */
+typedef struct statx struct_statx;
+
+#if !HAVE_STATX
+# define statx(dfd, filename, flags, mask, buffer) missing_statx(dfd, filename, flags, mask, buffer)
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_SET_MEMPOLICY
+enum {
+ MPOL_DEFAULT,
+ MPOL_PREFERRED,
+ MPOL_BIND,
+ MPOL_INTERLEAVE,
+ MPOL_LOCAL,
+};
+
+static inline long missing_set_mempolicy(int mode, const unsigned long *nodemask,
+ unsigned long maxnode) {
+ long i;
+# if defined __NR_set_mempolicy && __NR_set_mempolicy >= 0
+ i = syscall(__NR_set_mempolicy, mode, nodemask, maxnode);
+# else
+ errno = ENOSYS;
+ i = -1;
+# endif
+ return i;
+}
+
+# define set_mempolicy missing_set_mempolicy
+#endif
+
+#if !HAVE_GET_MEMPOLICY
+static inline long missing_get_mempolicy(int *mode, unsigned long *nodemask,
+ unsigned long maxnode, void *addr,
+ unsigned long flags) {
+ long i;
+# if defined __NR_get_mempolicy && __NR_get_mempolicy >= 0
+ i = syscall(__NR_get_mempolicy, mode, nodemask, maxnode, addr, flags);
+# else
+ errno = ENOSYS;
+ i = -1;
+# endif
+ return i;
+}
+
+# define get_mempolicy missing_get_mempolicy
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_PIDFD_SEND_SIGNAL
+static inline int missing_pidfd_send_signal(int fd, int sig, siginfo_t *info, unsigned flags) {
+# ifdef __NR_pidfd_send_signal
+ return syscall(__NR_pidfd_send_signal, fd, sig, info, flags);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define pidfd_send_signal missing_pidfd_send_signal
+#endif
+
+#if !HAVE_PIDFD_OPEN
+static inline int missing_pidfd_open(pid_t pid, unsigned flags) {
+# ifdef __NR_pidfd_open
+ return syscall(__NR_pidfd_open, pid, flags);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define pidfd_open missing_pidfd_open
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_RT_SIGQUEUEINFO
+static inline int missing_rt_sigqueueinfo(pid_t tgid, int sig, siginfo_t *info) {
+# if defined __NR_rt_sigqueueinfo && __NR_rt_sigqueueinfo >= 0
+ return syscall(__NR_rt_sigqueueinfo, tgid, sig, info);
+# else
+# error "__NR_rt_sigqueueinfo not defined"
+# endif
+}
+
+# define rt_sigqueueinfo missing_rt_sigqueueinfo
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_EXECVEAT
+static inline int missing_execveat(int dirfd, const char *pathname,
+ char *const argv[], char *const envp[],
+ int flags) {
+# if defined __NR_execveat && __NR_execveat >= 0
+ return syscall(__NR_execveat, dirfd, pathname, argv, envp, flags);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# undef AT_EMPTY_PATH
+# define AT_EMPTY_PATH 0x1000
+# define execveat missing_execveat
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_CLOSE_RANGE
+static inline int missing_close_range(int first_fd, int end_fd, unsigned flags) {
+# ifdef __NR_close_range
+ /* Kernel-side the syscall expects fds as unsigned integers (just like close() actually), while
+ * userspace exclusively uses signed integers for fds. We don't know just yet how glibc is going to
+ * wrap this syscall, but let's assume it's going to be similar to what they do for close(),
+ * i.e. make the same unsigned → signed type change from the raw kernel syscall compared to the
+ * userspace wrapper. There's only one caveat for this: unlike for close() there's the special
+ * UINT_MAX fd value for the 'end_fd' argument. Let's safely map that to -1 here. And let's refuse
+ * any other negative values. */
+ if ((first_fd < 0) || (end_fd < 0 && end_fd != -1)) {
+ errno = -EBADF;
+ return -1;
+ }
+
+ return syscall(__NR_close_range,
+ (unsigned) first_fd,
+ end_fd == -1 ? UINT_MAX : (unsigned) end_fd, /* Of course, the compiler should figure out that this is the identity mapping IRL */
+ flags);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define close_range missing_close_range
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_EPOLL_PWAIT2
+
+/* Defined to be equivalent to the kernel's _NSIG_WORDS, i.e. the size of the array of longs that is
+ * encapsulated by sigset_t. */
+#define KERNEL_NSIG_WORDS (64 / (sizeof(long) * 8))
+#define KERNEL_NSIG_BYTES (KERNEL_NSIG_WORDS * sizeof(long))
+
+struct epoll_event;
+
+static inline int missing_epoll_pwait2(
+ int fd,
+ struct epoll_event *events,
+ int maxevents,
+ const struct timespec *timeout,
+ const sigset_t *sigset) {
+
+# if defined(__NR_epoll_pwait2) && HAVE_LINUX_TIME_TYPES_H
+ if (timeout) {
+ /* Convert from userspace timespec to kernel timespec */
+ struct __kernel_timespec ts = {
+ .tv_sec = timeout->tv_sec,
+ .tv_nsec = timeout->tv_nsec,
+ };
+
+ return syscall(__NR_epoll_pwait2, fd, events, maxevents, &ts, sigset, sigset ? KERNEL_NSIG_BYTES : 0);
+ } else
+ return syscall(__NR_epoll_pwait2, fd, events, maxevents, NULL, sigset, sigset ? KERNEL_NSIG_BYTES : 0);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define epoll_pwait2 missing_epoll_pwait2
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_MOUNT_SETATTR
+
+#if !HAVE_STRUCT_MOUNT_ATTR
+struct mount_attr {
+ uint64_t attr_set;
+ uint64_t attr_clr;
+ uint64_t propagation;
+ uint64_t userns_fd;
+};
+#else
+struct mount_attr;
+#endif
+
+#ifndef MOUNT_ATTR_RDONLY
+#define MOUNT_ATTR_RDONLY 0x00000001 /* Mount read-only */
+#endif
+
+#ifndef MOUNT_ATTR_NOSUID
+#define MOUNT_ATTR_NOSUID 0x00000002 /* Ignore suid and sgid bits */
+#endif
+
+#ifndef MOUNT_ATTR_NODEV
+#define MOUNT_ATTR_NODEV 0x00000004 /* Disallow access to device special files */
+#endif
+
+#ifndef MOUNT_ATTR_NOEXEC
+#define MOUNT_ATTR_NOEXEC 0x00000008 /* Disallow program execution */
+#endif
+
+#ifndef MOUNT_ATTR__ATIME
+#define MOUNT_ATTR__ATIME 0x00000070 /* Setting on how atime should be updated */
+#endif
+
+#ifndef MOUNT_ATTR_RELATIME
+#define MOUNT_ATTR_RELATIME 0x00000000 /* - Update atime relative to mtime/ctime. */
+#endif
+
+#ifndef MOUNT_ATTR_NOATIME
+#define MOUNT_ATTR_NOATIME 0x00000010 /* - Do not update access times. */
+#endif
+
+#ifndef MOUNT_ATTR_STRICTATIME
+#define MOUNT_ATTR_STRICTATIME 0x00000020 /* - Always perform atime updates */
+#endif
+
+#ifndef MOUNT_ATTR_NODIRATIME
+#define MOUNT_ATTR_NODIRATIME 0x00000080 /* Do not update directory access times */
+#endif
+
+#ifndef MOUNT_ATTR_IDMAP
+#define MOUNT_ATTR_IDMAP 0x00100000 /* Idmap mount to @userns_fd in struct mount_attr. */
+#endif
+
+#ifndef MOUNT_ATTR_NOSYMFOLLOW
+#define MOUNT_ATTR_NOSYMFOLLOW 0x00200000 /* Do not follow symlinks */
+#endif
+
+#ifndef MOUNT_ATTR_SIZE_VER0
+#define MOUNT_ATTR_SIZE_VER0 32 /* sizeof first published struct */
+#endif
+
+#ifndef AT_RECURSIVE
+#define AT_RECURSIVE 0x8000
+#endif
+
+static inline int missing_mount_setattr(
+ int dfd,
+ const char *path,
+ unsigned flags,
+ struct mount_attr *attr,
+ size_t size) {
+
+# if defined __NR_mount_setattr && __NR_mount_setattr >= 0
+ return syscall(__NR_mount_setattr, dfd, path, flags, attr, size);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define mount_setattr missing_mount_setattr
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_OPEN_TREE
+
+#ifndef OPEN_TREE_CLONE
+#define OPEN_TREE_CLONE 1
+#endif
+
+#ifndef OPEN_TREE_CLOEXEC
+#define OPEN_TREE_CLOEXEC O_CLOEXEC
+#endif
+
+static inline int missing_open_tree(
+ int dfd,
+ const char *filename,
+ unsigned flags) {
+
+# if defined __NR_open_tree && __NR_open_tree >= 0
+ return syscall(__NR_open_tree, dfd, filename, flags);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define open_tree missing_open_tree
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_MOVE_MOUNT
+
+#ifndef MOVE_MOUNT_F_EMPTY_PATH
+#define MOVE_MOUNT_F_EMPTY_PATH 0x00000004 /* Empty from path permitted */
+#endif
+
+#ifndef MOVE_MOUNT_T_EMPTY_PATH
+#define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */
+#endif
+
+static inline int missing_move_mount(
+ int from_dfd,
+ const char *from_pathname,
+ int to_dfd,
+ const char *to_pathname,
+ unsigned flags) {
+
+# if defined __NR_move_mount && __NR_move_mount >= 0
+ return syscall(__NR_move_mount, from_dfd, from_pathname, to_dfd, to_pathname, flags);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define move_mount missing_move_mount
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_FSOPEN
+
+#ifndef FSOPEN_CLOEXEC
+#define FSOPEN_CLOEXEC 0x00000001
+#endif
+
+static inline int missing_fsopen(const char *fsname, unsigned flags) {
+# if defined __NR_fsopen && __NR_fsopen >= 0
+ return syscall(__NR_fsopen, fsname, flags);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define fsopen missing_fsopen
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_FSCONFIG
+
+#ifndef FSCONFIG_SET_STRING
+#define FSCONFIG_SET_STRING 1 /* Set parameter, supplying a string value */
+#endif
+
+static inline int missing_fsconfig(int fd, unsigned cmd, const char *key, const void *value, int aux) {
+# if defined __NR_fsconfig && __NR_fsconfig >= 0
+ return syscall(__NR_fsconfig, fd, cmd, key, value, aux);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define fsconfig missing_fsconfig
+#endif
+
+/* ======================================================================= */
+
+#if !HAVE_GETDENTS64
+
+static inline ssize_t missing_getdents64(int fd, void *buffer, size_t length) {
+# if defined __NR_getdents64 && __NR_getdents64 >= 0
+ return syscall(__NR_getdents64, fd, buffer, length);
+# else
+ errno = ENOSYS;
+ return -1;
+# endif
+}
+
+# define getdents64 missing_getdents64
+#endif