Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 680 insertions, 0 deletions

diff --git a/src/basic/missing_syscall.h b/src/basic/missing_syscall.h
new file mode 100644
index 0000000..8628077
--- /dev/null
+++ b/src/basic/missing_syscall.h
@@ -0,0 +1,680 @@
+/* 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_FCHMODAT2
+static inline int missing_fchmodat2(int dirfd, const char *path, mode_t mode, int flags) {
+#  ifdef __NR_fchmodat2
+        return syscall(__NR_fchmodat2, dirfd, path, mode, flags);
+#  else
+        errno = ENOSYS;
+        return -1;
+#  endif
+}
+
+#  define fchmodat2 missing_fchmodat2
+#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_RT_TGSIGQUEUEINFO
+static inline int missing_rt_tgsigqueueinfo(pid_t tgid, pid_t tid, int sig, siginfo_t *info) {
+#  if defined __NR_rt_tgsigqueueinfo && __NR_rt_tgsigqueueinfo >= 0
+        return syscall(__NR_rt_tgsigqueueinfo, tgid, tid, sig, info);
+#  else
+#    error "__NR_rt_tgsigqueueinfo not defined"
+#  endif
+}
+
+#  define rt_tgsigqueueinfo missing_rt_tgsigqueueinfo
+#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(unsigned first_fd, unsigned 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. glibc chose to expose it 1:1 however, hence we
+         * do so here too, even if we end up passing signed fds to it most of the time. */
+        return syscall(__NR_close_range,
+                       first_fd,
+                       end_fd,
+                       flags);
+#  else
+        errno = ENOSYS;
+        return -1;
+#  endif
+}
+
+#  define close_range missing_close_range
+#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
+
+/* ======================================================================= */
+
+#ifndef MOVE_MOUNT_BENEATH
+#define MOVE_MOUNT_BENEATH 0x00000200
+#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_FLAG
+#define FSCONFIG_SET_FLAG 0 /* Set parameter, supplying no value */
+#endif
+
+#ifndef FSCONFIG_SET_STRING
+#define FSCONFIG_SET_STRING 1 /* Set parameter, supplying a string value */
+#endif
+
+#ifndef FSCONFIG_SET_FD
+#define FSCONFIG_SET_FD 5 /* Set parameter, supplying an object by fd */
+#endif
+
+#ifndef FSCONFIG_CMD_CREATE
+#define FSCONFIG_CMD_CREATE 6 /* Invoke superblock creation */
+#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_FSMOUNT
+
+#ifndef FSMOUNT_CLOEXEC
+#define FSMOUNT_CLOEXEC 0x00000001
+#endif
+
+static inline int missing_fsmount(int fd, unsigned flags, unsigned ms_flags) {
+#  if defined __NR_fsmount && __NR_fsmount >= 0
+        return syscall(__NR_fsmount, fd, flags, ms_flags);
+#  else
+        errno = ENOSYS;
+        return -1;
+#  endif
+}
+
+#  define fsmount missing_fsmount
+#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
+
+/* ======================================================================= */
+
+/* glibc does not provide clone() on ia64, only clone2(). Not only that, but it also doesn't provide a
+ * prototype, only the symbol in the shared library (it provides a prototype for clone(), but not the
+ * symbol in the shared library). */
+#if defined(__ia64__)
+int __clone2(int (*fn)(void *), void *stack_base, size_t stack_size, int flags, void *arg);
+#define HAVE_CLONE 0
+#else
+/* We know that everywhere else clone() is available, so we don't bother with a meson check (that takes time
+ * at build time) and just define it. Once the kernel drops ia64 support, we can drop this too. */
+#define HAVE_CLONE 1
+#endif