diff options
Diffstat (limited to 'arch/um/include/shared/os.h')
| -rw-r--r-- | arch/um/include/shared/os.h | 171 |
1 files changed, 105 insertions, 66 deletions
diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h index 574e03fc7ba2..b26e94292fc1 100644 --- a/arch/um/include/shared/os.h +++ b/arch/um/include/shared/os.h @@ -1,17 +1,22 @@ +/* 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) - * Licensed under the GPL */ #ifndef __OS_H__ #define __OS_H__ -#include <stdarg.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)) @@ -36,6 +41,8 @@ #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...). @@ -136,9 +143,7 @@ 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); @@ -148,7 +153,7 @@ 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, unsigned long *modtime); +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); @@ -156,44 +161,48 @@ 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 int os_dup_file(int fd); extern void os_close_file(int fd); -extern int os_rcv_fd(int fd, int *helper_pid_out); -extern int create_unix_socket(char *file, int len, int close_on_exec); +ssize_t os_rcv_fd_msg(int fd, int *fds, unsigned int n_fds, + void *data, size_t data_len); 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 int os_stat_filesystem(char *path, long *bsize_out, - long long *blocks_out, long long *bfree_out, - long long *bavail_out, long long *files_out, - long long *ffree_out, void *fsid_out, - int fsid_size, long *namelen_out, - long *spare_out); -extern int os_change_dir(char *dir); -extern int os_fchange_dir(int fd); 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); +void *os_mmap_rw_shared(int fd, size_t size); +void *os_mremap_rw_shared(void *old_addr, size_t old_size, size_t new_size); /* 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); +/* tlb.c */ +extern void report_enomem(void); + /* process.c */ -extern unsigned long os_process_pc(int pid); -extern int os_process_parent(int pid); +pid_t os_reap_child(void); 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); @@ -204,8 +213,11 @@ extern int os_protect_memory(void *addr, unsigned long len, 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 void os_flush_stdout(void); -extern int os_mincore(void *addr, unsigned long len); + +void os_set_pdeathsig(void); + +int os_futex_wait(void *uaddr, unsigned int val); +int os_futex_wake(void *uaddr); /* execvp.c */ extern int execvp_noalloc(char *buf, const char *file, char *const argv[]); @@ -215,6 +227,11 @@ extern int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags, unsigned long *stack_out); extern int helper_wait(int pid); +struct os_helper_thread; +int os_run_helper_thread(struct os_helper_thread **td_out, + void *(*routine)(void *), void *arg); +void os_kill_helper_thread(struct os_helper_thread *td); +void os_fix_helper_thread_signals(void); /* umid.c */ extern int umid_file_name(char *name, char *buf, int len); @@ -224,21 +241,26 @@ 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 remove_sigstack(void); 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 get_signals(void); -extern int set_signals(int enable); -extern int os_is_signal_stack(void); +extern int um_get_signals(void); +extern int um_set_signals(int enable); +extern int um_set_signals_trace(int enable); 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); @@ -248,39 +270,29 @@ extern void os_warn(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); /* time.c */ -extern void os_idle_sleep(unsigned long long nsecs); -extern int os_timer_create(void* timer); -extern int os_timer_set_interval(void* timer, void* its); -extern int os_timer_one_shot(int ticks); -extern long long os_timer_disable(void); -extern long os_timer_remain(void* timer); -extern void uml_idle_timer(void); +void os_idle_prepare(void); +extern void os_idle_sleep(void); +extern int os_timer_create(void); +extern int os_timer_set_interval(int cpu, unsigned long long nsecs); +extern int os_timer_one_shot(int cpu, unsigned long long nsecs); +extern void os_timer_disable(int cpu); extern long long os_persistent_clock_emulation(void); extern long long os_nsecs(void); -extern long long os_vnsecs(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); +int syscall_stub_flush(struct mm_id *mm_idp); +struct stub_syscall *syscall_stub_alloc(struct mm_id *mm_idp); +void syscall_stub_dump_error(struct mm_id *mm_idp); + +int map(struct mm_id *mm_idp, unsigned long virt, + unsigned long len, int prot, int phys_fd, + unsigned long long offset); +int unmap(struct mm_id *mm_idp, unsigned long addr, unsigned long len); /* 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 int start_userspace(struct mm_id *mm_id); extern void userspace(struct uml_pt_regs *regs); -extern int map_stub_pages(int fd, unsigned long code, unsigned long data, - unsigned long stack); 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); @@ -290,31 +302,58 @@ extern void halt_skas(void); extern void reboot_skas(void); /* irq.c */ -extern int os_waiting_for_events(struct irq_fd *active_fds); -extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds); -extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg, - struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2); -extern void os_free_irq_later(struct irq_fd *active_fds, - int irq, void *dev_id); -extern int os_get_pollfd(int i); -extern void os_set_pollfd(int i, int fd); +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, int read); -extern void sigio_broken(int fd, int read); - -/* prctl.c */ -extern int os_arch_prctl(int pid, int option, unsigned long *arg2); +extern void maybe_sigio_broken(int fd); +extern void sigio_broken(void); +/* + * 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); /* 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); + +/* smp.c */ +#if IS_ENABLED(CONFIG_SMP) +void os_init_smp(void); +int os_start_cpu_thread(int cpu); +void os_start_secondary(void *arg, jmp_buf *switch_buf); +int os_send_ipi(int cpu, int vector); +void os_local_ipi_enable(void); +void os_local_ipi_disable(void); +#else /* !CONFIG_SMP */ +static inline void os_local_ipi_enable(void) { } +static inline void os_local_ipi_disable(void) { } +#endif /* CONFIG_SMP */ + #endif |