347 lines
11 KiB
C
347 lines
11 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
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* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
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* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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*/
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#ifndef __OS_H__
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#define __OS_H__
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#include <irq_user.h>
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#include <longjmp.h>
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#include <mm_id.h>
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/* This is to get size_t */
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#ifndef __UM_HOST__
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#include <linux/types.h>
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#else
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#include <sys/types.h>
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#endif
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#define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
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#define OS_TYPE_FILE 1
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#define OS_TYPE_DIR 2
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#define OS_TYPE_SYMLINK 3
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#define OS_TYPE_CHARDEV 4
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#define OS_TYPE_BLOCKDEV 5
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#define OS_TYPE_FIFO 6
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#define OS_TYPE_SOCK 7
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/* os_access() flags */
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#define OS_ACC_F_OK 0 /* Test for existence. */
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#define OS_ACC_X_OK 1 /* Test for execute permission. */
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#define OS_ACC_W_OK 2 /* Test for write permission. */
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#define OS_ACC_R_OK 4 /* Test for read permission. */
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#define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
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#ifdef CONFIG_64BIT
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#define OS_LIB_PATH "/usr/lib64/"
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#else
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#define OS_LIB_PATH "/usr/lib/"
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#endif
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#define OS_SENDMSG_MAX_FDS 8
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/*
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* types taken from stat_file() in hostfs_user.c
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* (if they are wrong here, they are wrong there...).
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*/
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struct uml_stat {
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int ust_dev; /* device */
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unsigned long long ust_ino; /* inode */
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int ust_mode; /* protection */
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int ust_nlink; /* number of hard links */
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int ust_uid; /* user ID of owner */
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int ust_gid; /* group ID of owner */
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unsigned long long ust_size; /* total size, in bytes */
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int ust_blksize; /* blocksize for filesystem I/O */
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unsigned long long ust_blocks; /* number of blocks allocated */
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unsigned long ust_atime; /* time of last access */
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unsigned long ust_mtime; /* time of last modification */
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unsigned long ust_ctime; /* time of last change */
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};
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struct openflags {
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unsigned int r : 1;
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unsigned int w : 1;
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unsigned int s : 1; /* O_SYNC */
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unsigned int c : 1; /* O_CREAT */
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unsigned int t : 1; /* O_TRUNC */
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unsigned int a : 1; /* O_APPEND */
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unsigned int e : 1; /* O_EXCL */
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unsigned int cl : 1; /* FD_CLOEXEC */
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};
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#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
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.t = 0, .a = 0, .e = 0, .cl = 0 })
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static inline struct openflags of_read(struct openflags flags)
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{
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flags.r = 1;
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return flags;
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}
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static inline struct openflags of_write(struct openflags flags)
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{
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flags.w = 1;
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return flags;
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}
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static inline struct openflags of_rdwr(struct openflags flags)
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{
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return of_read(of_write(flags));
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}
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static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
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{
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flags.r = r;
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flags.w = w;
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return flags;
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}
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static inline struct openflags of_sync(struct openflags flags)
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{
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flags.s = 1;
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return flags;
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}
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static inline struct openflags of_create(struct openflags flags)
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{
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flags.c = 1;
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return flags;
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}
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static inline struct openflags of_trunc(struct openflags flags)
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{
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flags.t = 1;
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return flags;
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}
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static inline struct openflags of_append(struct openflags flags)
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{
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flags.a = 1;
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return flags;
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}
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static inline struct openflags of_excl(struct openflags flags)
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{
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flags.e = 1;
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return flags;
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}
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static inline struct openflags of_cloexec(struct openflags flags)
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{
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flags.cl = 1;
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return flags;
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}
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/* file.c */
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extern int os_stat_file(const char *file_name, struct uml_stat *buf);
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extern int os_stat_fd(const int fd, struct uml_stat *buf);
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extern int os_access(const char *file, int mode);
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extern int os_set_exec_close(int fd);
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extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
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extern int os_get_ifname(int fd, char *namebuf);
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extern int os_set_slip(int fd);
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extern int os_mode_fd(int fd, int mode);
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extern int os_fsync_file(int fd);
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extern int os_seek_file(int fd, unsigned long long offset);
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extern int os_open_file(const char *file, struct openflags flags, int mode);
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extern int os_read_file(int fd, void *buf, int len);
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extern int os_write_file(int fd, const void *buf, int count);
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extern int os_sync_file(int fd);
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extern int os_file_size(const char *file, unsigned long long *size_out);
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extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset);
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extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset);
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extern int os_file_modtime(const char *file, long long *modtime);
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extern int os_pipe(int *fd, int stream, int close_on_exec);
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extern int os_set_fd_async(int fd);
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extern int os_clear_fd_async(int fd);
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extern int os_set_fd_block(int fd, int blocking);
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extern int os_accept_connection(int fd);
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extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
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extern int os_shutdown_socket(int fd, int r, int w);
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extern void os_close_file(int fd);
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extern int os_rcv_fd(int fd, int *helper_pid_out);
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extern int os_connect_socket(const char *name);
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extern int os_file_type(char *file);
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extern int os_file_mode(const char *file, struct openflags *mode_out);
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extern int os_lock_file(int fd, int excl);
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extern void os_flush_stdout(void);
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extern unsigned os_major(unsigned long long dev);
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extern unsigned os_minor(unsigned long long dev);
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extern unsigned long long os_makedev(unsigned major, unsigned minor);
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extern int os_falloc_punch(int fd, unsigned long long offset, int count);
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extern int os_falloc_zeroes(int fd, unsigned long long offset, int count);
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extern int os_eventfd(unsigned int initval, int flags);
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extern int os_sendmsg_fds(int fd, const void *buf, unsigned int len,
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const int *fds, unsigned int fds_num);
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int os_poll(unsigned int n, const int *fds);
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/* start_up.c */
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extern void os_early_checks(void);
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extern void os_check_bugs(void);
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extern void check_host_supports_tls(int *supports_tls, int *tls_min);
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extern void get_host_cpu_features(
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void (*flags_helper_func)(char *line),
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void (*cache_helper_func)(char *line));
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/* mem.c */
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extern int create_mem_file(unsigned long long len);
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/* process.c */
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extern unsigned long os_process_pc(int pid);
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extern int os_process_parent(int pid);
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extern void os_alarm_process(int pid);
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extern void os_stop_process(int pid);
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extern void os_kill_process(int pid, int reap_child);
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extern void os_kill_ptraced_process(int pid, int reap_child);
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extern int os_getpid(void);
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extern int os_getpgrp(void);
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extern void init_new_thread_signals(void);
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extern int os_map_memory(void *virt, int fd, unsigned long long off,
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unsigned long len, int r, int w, int x);
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extern int os_protect_memory(void *addr, unsigned long len,
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int r, int w, int x);
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extern int os_unmap_memory(void *addr, int len);
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extern int os_drop_memory(void *addr, int length);
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extern int can_drop_memory(void);
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extern int os_mincore(void *addr, unsigned long len);
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/* execvp.c */
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extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
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/* helper.c */
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extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
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extern int run_helper_thread(int (*proc)(void *), void *arg,
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unsigned int flags, unsigned long *stack_out);
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extern int helper_wait(int pid);
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/* umid.c */
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extern int umid_file_name(char *name, char *buf, int len);
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extern int set_umid(char *name);
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extern char *get_umid(void);
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/* signal.c */
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extern void timer_set_signal_handler(void);
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extern void set_sigstack(void *sig_stack, int size);
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extern void set_handler(int sig);
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extern void send_sigio_to_self(void);
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extern int change_sig(int signal, int on);
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extern void block_signals(void);
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extern void unblock_signals(void);
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extern int um_set_signals(int enable);
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extern int um_set_signals_trace(int enable);
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extern int os_is_signal_stack(void);
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extern void deliver_alarm(void);
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extern void register_pm_wake_signal(void);
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extern void block_signals_hard(void);
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extern void unblock_signals_hard(void);
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extern void mark_sigio_pending(void);
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/* util.c */
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extern void stack_protections(unsigned long address);
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extern int raw(int fd);
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extern void setup_machinename(char *machine_out);
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extern void setup_hostinfo(char *buf, int len);
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extern ssize_t os_getrandom(void *buf, size_t len, unsigned int flags);
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extern void os_dump_core(void) __attribute__ ((noreturn));
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extern void um_early_printk(const char *s, unsigned int n);
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extern void os_fix_helper_signals(void);
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extern void os_info(const char *fmt, ...)
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__attribute__ ((format (printf, 1, 2)));
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extern void os_warn(const char *fmt, ...)
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__attribute__ ((format (printf, 1, 2)));
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/* time.c */
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extern void os_idle_sleep(void);
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extern int os_timer_create(void);
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extern int os_timer_set_interval(unsigned long long nsecs);
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extern int os_timer_one_shot(unsigned long long nsecs);
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extern void os_timer_disable(void);
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extern long long os_persistent_clock_emulation(void);
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extern long long os_nsecs(void);
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/* skas/mem.c */
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extern long run_syscall_stub(struct mm_id * mm_idp,
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int syscall, unsigned long *args, long expected,
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void **addr, int done);
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extern long syscall_stub_data(struct mm_id * mm_idp,
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unsigned long *data, int data_count,
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void **addr, void **stub_addr);
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extern int map(struct mm_id * mm_idp, unsigned long virt,
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unsigned long len, int prot, int phys_fd,
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unsigned long long offset, int done, void **data);
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extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
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int done, void **data);
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extern int protect(struct mm_id * mm_idp, unsigned long addr,
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unsigned long len, unsigned int prot, int done, void **data);
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/* skas/process.c */
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extern int is_skas_winch(int pid, int fd, void *data);
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extern int start_userspace(unsigned long stub_stack);
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extern int copy_context_skas0(unsigned long stack, int pid);
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extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs);
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extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
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extern void switch_threads(jmp_buf *me, jmp_buf *you);
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extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
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extern void initial_thread_cb_skas(void (*proc)(void *),
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void *arg);
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extern void halt_skas(void);
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extern void reboot_skas(void);
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/* irq.c */
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extern int os_waiting_for_events_epoll(void);
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extern void *os_epoll_get_data_pointer(int index);
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extern int os_epoll_triggered(int index, int events);
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extern int os_event_mask(enum um_irq_type irq_type);
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extern int os_setup_epoll(void);
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extern int os_add_epoll_fd(int events, int fd, void *data);
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extern int os_mod_epoll_fd(int events, int fd, void *data);
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extern int os_del_epoll_fd(int fd);
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extern void os_set_ioignore(void);
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extern void os_close_epoll_fd(void);
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extern void um_irqs_suspend(void);
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extern void um_irqs_resume(void);
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/* sigio.c */
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extern int add_sigio_fd(int fd);
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extern int ignore_sigio_fd(int fd);
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extern void maybe_sigio_broken(int fd);
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extern void sigio_broken(int fd);
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/*
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* unlocked versions for IRQ controller code.
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*
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* This is safe because it's used at suspend/resume and nothing
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* else is running.
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*/
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extern int __add_sigio_fd(int fd);
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extern int __ignore_sigio_fd(int fd);
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/* prctl.c */
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extern int os_arch_prctl(int pid, int option, unsigned long *arg2);
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/* tty.c */
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extern int get_pty(void);
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/* sys-$ARCH/task_size.c */
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extern unsigned long os_get_top_address(void);
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long syscall(long number, ...);
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/* irqflags tracing */
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extern void block_signals_trace(void);
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extern void unblock_signals_trace(void);
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extern void um_trace_signals_on(void);
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extern void um_trace_signals_off(void);
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/* time-travel */
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extern void deliver_time_travel_irqs(void);
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#endif
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