| /* |
| * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) |
| * Licensed under the GPL |
| */ |
| |
| #ifndef __OS_H__ |
| #define __OS_H__ |
| |
| #include "uml-config.h" |
| #include "asm/types.h" |
| #include "../os/include/file.h" |
| #include "sysdep/ptrace.h" |
| #include "kern_util.h" |
| #include "skas/mm_id.h" |
| #include "irq_user.h" |
| #include "sysdep/tls.h" |
| |
| #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 */ |
| |
| /* |
| * 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 void os_print_error(int error, const char* str); |
| extern int os_get_exec_close(int fd, int *close_on_exec); |
| extern int os_set_exec_close(int fd, int close_on_exec); |
| extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); |
| extern int os_window_size(int fd, int *rows, int *cols); |
| extern int os_new_tty_pgrp(int fd, int pid); |
| extern int os_get_ifname(int fd, char *namebuf); |
| extern int os_set_slip(int fd); |
| extern int os_set_owner(int fd, int pid); |
| extern int os_sigio_async(int master, int slave); |
| extern int os_mode_fd(int fd, int mode); |
| |
| extern int os_seek_file(int fd, __u64 offset); |
| extern int os_open_file(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_file_size(char *file, unsigned long long *size_out); |
| extern int os_file_modtime(char *file, unsigned long *modtime); |
| extern int os_pipe(int *fd, int stream, int close_on_exec); |
| extern int os_set_fd_async(int fd, int owner); |
| 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(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 create_unix_socket(char *file, int len, int close_on_exec); |
| extern int os_connect_socket(char *name); |
| extern int os_file_type(char *file); |
| extern int os_file_mode(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); |
| |
| /* start_up.c */ |
| extern void os_early_checks(void); |
| extern int can_do_skas(void); |
| extern void os_check_bugs(void); |
| extern void check_host_supports_tls(int *supports_tls, int *tls_min); |
| |
| /* Make sure they are clear when running in TT mode. Required by |
| * SEGV_MAYBE_FIXABLE */ |
| #ifdef UML_CONFIG_MODE_SKAS |
| #define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0) |
| #else |
| #define clear_can_do_skas() do {} while (0) |
| #endif |
| |
| /* 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_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 void os_usr1_process(int pid); |
| extern long os_ptrace_ldt(long pid, long addr, long data); |
| |
| extern int os_getpid(void); |
| extern int os_getpgrp(void); |
| |
| extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int)); |
| extern void init_new_thread_signals(void); |
| extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr); |
| |
| 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 void os_flush_stdout(void); |
| |
| /* tt.c |
| * for tt mode only (will be deleted in future...) |
| */ |
| extern void forward_ipi(int fd, int pid); |
| extern void kill_child_dead(int pid); |
| extern void stop(void); |
| extern int wait_for_stop(int pid, int sig, int cont_type, void *relay); |
| extern int protect_memory(unsigned long addr, unsigned long len, |
| int r, int w, int x, int must_succeed); |
| extern void forward_pending_sigio(int target); |
| extern int start_fork_tramp(void *arg, unsigned long temp_stack, |
| int clone_flags, int (*tramp)(void *)); |
| |
| /* uaccess.c */ |
| extern unsigned long __do_user_copy(void *to, const void *from, int n, |
| void **fault_addr, void **fault_catcher, |
| void (*op)(void *to, const void *from, |
| int n), int *faulted_out); |
| |
| /* helper.c */ |
| extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, |
| unsigned long *stack_out); |
| extern int run_helper_thread(int (*proc)(void *), void *arg, |
| unsigned int flags, unsigned long *stack_out, |
| int stack_order); |
| extern int helper_wait(int pid); |
| |
| |
| /* tls.c */ |
| extern int os_set_thread_area(user_desc_t *info, int pid); |
| extern int os_get_thread_area(user_desc_t *info, 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 set_sigstack(void *sig_stack, int size); |
| extern void remove_sigstack(void); |
| extern void set_handler(int sig, void (*handler)(int), int flags, ...); |
| 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 void os_usr1_signal(int on); |
| |
| /* trap.c */ |
| extern void os_fill_handlinfo(struct kern_handlers h); |
| extern void do_longjmp(void *p, int val); |
| |
| /* util.c */ |
| extern void stack_protections(unsigned long address); |
| extern void task_protections(unsigned long address); |
| extern int raw(int fd); |
| extern void setup_machinename(char *machine_out); |
| extern void setup_hostinfo(void); |
| extern int setjmp_wrapper(void (*proc)(void *, void *), ...); |
| |
| /* time.c */ |
| #define BILLION (1000 * 1000 * 1000) |
| |
| extern void switch_timers(int to_real); |
| extern void idle_sleep(int secs); |
| extern void enable_timer(void); |
| extern void disable_timer(void); |
| extern void user_time_init(void); |
| extern void uml_idle_timer(void); |
| extern unsigned 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 r, int w, int x, int phys_fd, |
| unsigned long long offset, int done, void **data); |
| extern int unmap(struct mm_id * mm_idp, void *addr, unsigned long len, |
| int done, void **data); |
| extern int protect(struct mm_id * mm_idp, unsigned long addr, |
| unsigned long len, int r, int w, int x, 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(union uml_pt_regs *regs); |
| extern void map_stub_pages(int fd, unsigned long code, |
| unsigned long data, unsigned long stack); |
| extern void new_thread(void *stack, void **switch_buf_ptr, |
| void **fork_buf_ptr, void (*handler)(int)); |
| extern void thread_wait(void *sw, void *fb); |
| extern void switch_threads(void *me, void *next); |
| extern int start_idle_thread(void *stack, void *switch_buf_ptr, |
| void **fork_buf_ptr); |
| 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(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 void os_set_ioignore(void); |
| extern void init_irq_signals(int on_sigstack); |
| |
| /* 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); |
| |
| /* skas/trap */ |
| extern void sig_handler_common_skas(int sig, void *sc_ptr); |
| extern void user_signal(int sig, union uml_pt_regs *regs, int pid); |
| |
| #endif |