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Diffstat (limited to 'arch/um/include/shared/os.h')
| -rw-r--r-- | arch/um/include/shared/os.h | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h new file mode 100644 index 000000000..0df646c66 --- /dev/null +++ b/arch/um/include/shared/os.h @@ -0,0 +1,346 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk}) + * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de) + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + */ + +#ifndef __OS_H__ +#define __OS_H__ + +#include <irq_user.h> +#include <longjmp.h> +#include <mm_id.h> +/* This is to get size_t */ +#ifndef __UM_HOST__ +#include <linux/types.h> +#else +#include <sys/types.h> +#endif + +#define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR)) + +#define OS_TYPE_FILE 1 +#define OS_TYPE_DIR 2 +#define OS_TYPE_SYMLINK 3 +#define OS_TYPE_CHARDEV 4 +#define OS_TYPE_BLOCKDEV 5 +#define OS_TYPE_FIFO 6 +#define OS_TYPE_SOCK 7 + +/* os_access() flags */ +#define OS_ACC_F_OK 0 /* Test for existence. */ +#define OS_ACC_X_OK 1 /* Test for execute permission. */ +#define OS_ACC_W_OK 2 /* Test for write permission. */ +#define OS_ACC_R_OK 4 /* Test for read permission. */ +#define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */ + +#ifdef CONFIG_64BIT +#define OS_LIB_PATH "/usr/lib64/" +#else +#define OS_LIB_PATH "/usr/lib/" +#endif + +#define OS_SENDMSG_MAX_FDS 8 + +/* + * types taken from stat_file() in hostfs_user.c + * (if they are wrong here, they are wrong there...). + */ +struct uml_stat { + int ust_dev; /* device */ + unsigned long long ust_ino; /* inode */ + int ust_mode; /* protection */ + int ust_nlink; /* number of hard links */ + int ust_uid; /* user ID of owner */ + int ust_gid; /* group ID of owner */ + unsigned long long ust_size; /* total size, in bytes */ + int ust_blksize; /* blocksize for filesystem I/O */ + unsigned long long ust_blocks; /* number of blocks allocated */ + unsigned long ust_atime; /* time of last access */ + unsigned long ust_mtime; /* time of last modification */ + unsigned long ust_ctime; /* time of last change */ +}; + +struct openflags { + unsigned int r : 1; + unsigned int w : 1; + unsigned int s : 1; /* O_SYNC */ + unsigned int c : 1; /* O_CREAT */ + unsigned int t : 1; /* O_TRUNC */ + unsigned int a : 1; /* O_APPEND */ + unsigned int e : 1; /* O_EXCL */ + unsigned int cl : 1; /* FD_CLOEXEC */ +}; + +#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \ + .t = 0, .a = 0, .e = 0, .cl = 0 }) + +static inline struct openflags of_read(struct openflags flags) +{ + flags.r = 1; + return flags; +} + +static inline struct openflags of_write(struct openflags flags) +{ + flags.w = 1; + return flags; +} + +static inline struct openflags of_rdwr(struct openflags flags) +{ + return of_read(of_write(flags)); +} + +static inline struct openflags of_set_rw(struct openflags flags, int r, int w) +{ + flags.r = r; + flags.w = w; + return flags; +} + +static inline struct openflags of_sync(struct openflags flags) +{ + flags.s = 1; + return flags; +} + +static inline struct openflags of_create(struct openflags flags) +{ + flags.c = 1; + return flags; +} + +static inline struct openflags of_trunc(struct openflags flags) +{ + flags.t = 1; + return flags; +} + +static inline struct openflags of_append(struct openflags flags) +{ + flags.a = 1; + return flags; +} + +static inline struct openflags of_excl(struct openflags flags) +{ + flags.e = 1; + return flags; +} + +static inline struct openflags of_cloexec(struct openflags flags) +{ + flags.cl = 1; + return flags; +} + +/* file.c */ +extern int os_stat_file(const char *file_name, struct uml_stat *buf); +extern int os_stat_fd(const int fd, struct uml_stat *buf); +extern int os_access(const char *file, int mode); +extern int os_set_exec_close(int fd); +extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); +extern int os_get_ifname(int fd, char *namebuf); +extern int os_set_slip(int fd); +extern int os_mode_fd(int fd, int mode); +extern int os_fsync_file(int fd); + +extern int os_seek_file(int fd, unsigned long long offset); +extern int os_open_file(const char *file, struct openflags flags, int mode); +extern int os_read_file(int fd, void *buf, int len); +extern int os_write_file(int fd, const void *buf, int count); +extern int os_sync_file(int fd); +extern int os_file_size(const char *file, unsigned long long *size_out); +extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset); +extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset); +extern int os_file_modtime(const char *file, long long *modtime); +extern int os_pipe(int *fd, int stream, int close_on_exec); +extern int os_set_fd_async(int fd); +extern int os_clear_fd_async(int fd); +extern int os_set_fd_block(int fd, int blocking); +extern int os_accept_connection(int fd); +extern int os_create_unix_socket(const char *file, int len, int close_on_exec); +extern int os_shutdown_socket(int fd, int r, int w); +extern void os_close_file(int fd); +extern int os_rcv_fd(int fd, int *helper_pid_out); +extern int os_connect_socket(const char *name); +extern int os_file_type(char *file); +extern int os_file_mode(const char *file, struct openflags *mode_out); +extern int os_lock_file(int fd, int excl); +extern void os_flush_stdout(void); +extern unsigned os_major(unsigned long long dev); +extern unsigned os_minor(unsigned long long dev); +extern unsigned long long os_makedev(unsigned major, unsigned minor); +extern int os_falloc_punch(int fd, unsigned long long offset, int count); +extern int os_falloc_zeroes(int fd, unsigned long long offset, int count); +extern int os_eventfd(unsigned int initval, int flags); +extern int os_sendmsg_fds(int fd, const void *buf, unsigned int len, + const int *fds, unsigned int fds_num); +int os_poll(unsigned int n, const int *fds); + +/* start_up.c */ +extern void os_early_checks(void); +extern void os_check_bugs(void); +extern void check_host_supports_tls(int *supports_tls, int *tls_min); +extern void get_host_cpu_features( + void (*flags_helper_func)(char *line), + void (*cache_helper_func)(char *line)); + +/* mem.c */ +extern int create_mem_file(unsigned long long len); + +/* process.c */ +extern unsigned long os_process_pc(int pid); +extern int os_process_parent(int pid); +extern void os_alarm_process(int pid); +extern void os_stop_process(int pid); +extern void os_kill_process(int pid, int reap_child); +extern void os_kill_ptraced_process(int pid, int reap_child); + +extern int os_getpid(void); +extern int os_getpgrp(void); + +extern void init_new_thread_signals(void); + +extern int os_map_memory(void *virt, int fd, unsigned long long off, + unsigned long len, int r, int w, int x); +extern int os_protect_memory(void *addr, unsigned long len, + int r, int w, int x); +extern int os_unmap_memory(void *addr, int len); +extern int os_drop_memory(void *addr, int length); +extern int can_drop_memory(void); +extern int os_mincore(void *addr, unsigned long len); + +/* execvp.c */ +extern int execvp_noalloc(char *buf, const char *file, char *const argv[]); +/* helper.c */ +extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv); +extern int run_helper_thread(int (*proc)(void *), void *arg, + unsigned int flags, unsigned long *stack_out); +extern int helper_wait(int pid); + + +/* umid.c */ +extern int umid_file_name(char *name, char *buf, int len); +extern int set_umid(char *name); +extern char *get_umid(void); + +/* signal.c */ +extern void timer_set_signal_handler(void); +extern void set_sigstack(void *sig_stack, int size); +extern void set_handler(int sig); +extern void send_sigio_to_self(void); +extern int change_sig(int signal, int on); +extern void block_signals(void); +extern void unblock_signals(void); +extern int um_set_signals(int enable); +extern int um_set_signals_trace(int enable); +extern int os_is_signal_stack(void); +extern void deliver_alarm(void); +extern void register_pm_wake_signal(void); +extern void block_signals_hard(void); +extern void unblock_signals_hard(void); +extern void mark_sigio_pending(void); + +/* util.c */ +extern void stack_protections(unsigned long address); +extern int raw(int fd); +extern void setup_machinename(char *machine_out); +extern void setup_hostinfo(char *buf, int len); +extern ssize_t os_getrandom(void *buf, size_t len, unsigned int flags); +extern void os_dump_core(void) __attribute__ ((noreturn)); +extern void um_early_printk(const char *s, unsigned int n); +extern void os_fix_helper_signals(void); +extern void os_info(const char *fmt, ...) + __attribute__ ((format (printf, 1, 2))); +extern void os_warn(const char *fmt, ...) + __attribute__ ((format (printf, 1, 2))); + +/* time.c */ +extern void os_idle_sleep(void); +extern int os_timer_create(void); +extern int os_timer_set_interval(unsigned long long nsecs); +extern int os_timer_one_shot(unsigned long long nsecs); +extern void os_timer_disable(void); +extern long long os_persistent_clock_emulation(void); +extern long long os_nsecs(void); + +/* skas/mem.c */ +extern long run_syscall_stub(struct mm_id * mm_idp, + int syscall, unsigned long *args, long expected, + void **addr, int done); +extern long syscall_stub_data(struct mm_id * mm_idp, + unsigned long *data, int data_count, + void **addr, void **stub_addr); +extern int map(struct mm_id * mm_idp, unsigned long virt, + unsigned long len, int prot, int phys_fd, + unsigned long long offset, int done, void **data); +extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, + int done, void **data); +extern int protect(struct mm_id * mm_idp, unsigned long addr, + unsigned long len, unsigned int prot, int done, void **data); + +/* skas/process.c */ +extern int is_skas_winch(int pid, int fd, void *data); +extern int start_userspace(unsigned long stub_stack); +extern int copy_context_skas0(unsigned long stack, int pid); +extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs); +extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)); +extern void switch_threads(jmp_buf *me, jmp_buf *you); +extern int start_idle_thread(void *stack, jmp_buf *switch_buf); +extern void initial_thread_cb_skas(void (*proc)(void *), + void *arg); +extern void halt_skas(void); +extern void reboot_skas(void); + +/* irq.c */ +extern int os_waiting_for_events_epoll(void); +extern void *os_epoll_get_data_pointer(int index); +extern int os_epoll_triggered(int index, int events); +extern int os_event_mask(enum um_irq_type irq_type); +extern int os_setup_epoll(void); +extern int os_add_epoll_fd(int events, int fd, void *data); +extern int os_mod_epoll_fd(int events, int fd, void *data); +extern int os_del_epoll_fd(int fd); +extern void os_set_ioignore(void); +extern void os_close_epoll_fd(void); +extern void um_irqs_suspend(void); +extern void um_irqs_resume(void); + +/* sigio.c */ +extern int add_sigio_fd(int fd); +extern int ignore_sigio_fd(int fd); +extern void maybe_sigio_broken(int fd); +extern void sigio_broken(int fd); +/* + * unlocked versions for IRQ controller code. + * + * This is safe because it's used at suspend/resume and nothing + * else is running. + */ +extern int __add_sigio_fd(int fd); +extern int __ignore_sigio_fd(int fd); + +/* prctl.c */ +extern int os_arch_prctl(int pid, int option, unsigned long *arg2); + +/* tty.c */ +extern int get_pty(void); + +/* sys-$ARCH/task_size.c */ +extern unsigned long os_get_top_address(void); + +long syscall(long number, ...); + +/* irqflags tracing */ +extern void block_signals_trace(void); +extern void unblock_signals_trace(void); +extern void um_trace_signals_on(void); +extern void um_trace_signals_off(void); + +/* time-travel */ +extern void deliver_time_travel_irqs(void); + +#endif |