/* * 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" #include "sysdep/tls.h" #include "../os/include/file.h" #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 */ /* * 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_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_file_size(const char *file, unsigned long long *size_out); extern int os_file_modtime(const 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); 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 create_unix_socket(char *file, int len, int close_on_exec); 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); /* start_up.c */ extern void os_early_checks(void); extern void can_do_skas(void); extern void os_check_bugs(void); extern void check_host_supports_tls(int *supports_tls, int *tls_min); /* 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 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_signals(void); extern int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **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); /* uaccess.c */ extern unsigned long __do_user_copy(void *to, const void *from, int n, void **fault_addr, jmp_buf **fault_catcher, void (*op)(void *to, const void *from, int n), int *faulted_out); /* 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); /* 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 timer_init(void); 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); /* 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 void os_dump_core(void) __attribute__ ((noreturn)); /* time.c */ extern void idle_sleep(unsigned long long nsecs); extern int set_interval(void); extern int timer_one_shot(int ticks); extern long long disable_timer(void); extern void uml_idle_timer(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); 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); 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); /* 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); /* sys-x86_64/prctl.c */ extern int os_arch_prctl(int pid, int code, unsigned long *addr); /* tty.c */ extern int get_pty(void); /* sys-$ARCH/task_size.c */ extern unsigned long os_get_task_size(void); #endif