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Diffstat (limited to 'arch/um/include/shared/os.h')
| -rw-r--r-- | arch/um/include/shared/os.h | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h new file mode 100644 index 00000000000..cd40fddcf99 --- /dev/null +++ b/arch/um/include/shared/os.h @@ -0,0 +1,303 @@ +/* + * 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" + +#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); +extern void 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_top_address(void); + +#endif |