304 lines
9.9 KiB
C
304 lines
9.9 KiB
C
/*
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* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#ifndef __OS_H__
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#define __OS_H__
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#include <stdarg.h>
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#include "irq_user.h"
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#include "longjmp.h"
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#include "mm_id.h"
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#include "sysdep/tls.h"
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#define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
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#define OS_TYPE_FILE 1
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#define OS_TYPE_DIR 2
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#define OS_TYPE_SYMLINK 3
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#define OS_TYPE_CHARDEV 4
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#define OS_TYPE_BLOCKDEV 5
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#define OS_TYPE_FIFO 6
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#define OS_TYPE_SOCK 7
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/* os_access() flags */
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#define OS_ACC_F_OK 0 /* Test for existence. */
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#define OS_ACC_X_OK 1 /* Test for execute permission. */
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#define OS_ACC_W_OK 2 /* Test for write permission. */
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#define OS_ACC_R_OK 4 /* Test for read permission. */
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#define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
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/*
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* types taken from stat_file() in hostfs_user.c
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* (if they are wrong here, they are wrong there...).
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*/
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struct uml_stat {
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int ust_dev; /* device */
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unsigned long long ust_ino; /* inode */
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int ust_mode; /* protection */
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int ust_nlink; /* number of hard links */
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int ust_uid; /* user ID of owner */
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int ust_gid; /* group ID of owner */
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unsigned long long ust_size; /* total size, in bytes */
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int ust_blksize; /* blocksize for filesystem I/O */
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unsigned long long ust_blocks; /* number of blocks allocated */
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unsigned long ust_atime; /* time of last access */
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unsigned long ust_mtime; /* time of last modification */
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unsigned long ust_ctime; /* time of last change */
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};
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struct openflags {
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unsigned int r : 1;
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unsigned int w : 1;
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unsigned int s : 1; /* O_SYNC */
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unsigned int c : 1; /* O_CREAT */
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unsigned int t : 1; /* O_TRUNC */
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unsigned int a : 1; /* O_APPEND */
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unsigned int e : 1; /* O_EXCL */
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unsigned int cl : 1; /* FD_CLOEXEC */
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};
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#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
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.t = 0, .a = 0, .e = 0, .cl = 0 })
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static inline struct openflags of_read(struct openflags flags)
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{
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flags.r = 1;
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return flags;
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}
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static inline struct openflags of_write(struct openflags flags)
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{
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flags.w = 1;
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return flags;
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}
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static inline struct openflags of_rdwr(struct openflags flags)
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{
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return of_read(of_write(flags));
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}
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static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
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{
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flags.r = r;
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flags.w = w;
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return flags;
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}
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static inline struct openflags of_sync(struct openflags flags)
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{
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flags.s = 1;
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return flags;
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}
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static inline struct openflags of_create(struct openflags flags)
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{
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flags.c = 1;
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return flags;
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}
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static inline struct openflags of_trunc(struct openflags flags)
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{
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flags.t = 1;
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return flags;
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}
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static inline struct openflags of_append(struct openflags flags)
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{
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flags.a = 1;
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return flags;
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}
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static inline struct openflags of_excl(struct openflags flags)
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{
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flags.e = 1;
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return flags;
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}
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static inline struct openflags of_cloexec(struct openflags flags)
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{
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flags.cl = 1;
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return flags;
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}
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/* file.c */
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extern int os_stat_file(const char *file_name, struct uml_stat *buf);
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extern int os_stat_fd(const int fd, struct uml_stat *buf);
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extern int os_access(const char *file, int mode);
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extern int os_set_exec_close(int fd);
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extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
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extern int os_get_ifname(int fd, char *namebuf);
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extern int os_set_slip(int fd);
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extern int os_mode_fd(int fd, int mode);
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extern int os_seek_file(int fd, unsigned long long offset);
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extern int os_open_file(const char *file, struct openflags flags, int mode);
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extern int os_read_file(int fd, void *buf, int len);
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extern int os_write_file(int fd, const void *buf, int count);
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extern int os_file_size(const char *file, unsigned long long *size_out);
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extern int os_file_modtime(const char *file, unsigned long *modtime);
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extern int os_pipe(int *fd, int stream, int close_on_exec);
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extern int os_set_fd_async(int fd);
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extern int os_clear_fd_async(int fd);
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extern int os_set_fd_block(int fd, int blocking);
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extern int os_accept_connection(int fd);
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extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
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extern int os_shutdown_socket(int fd, int r, int w);
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extern void os_close_file(int fd);
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extern int os_rcv_fd(int fd, int *helper_pid_out);
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extern int create_unix_socket(char *file, int len, int close_on_exec);
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extern int os_connect_socket(const char *name);
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extern int os_file_type(char *file);
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extern int os_file_mode(const char *file, struct openflags *mode_out);
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extern int os_lock_file(int fd, int excl);
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extern void os_flush_stdout(void);
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extern int os_stat_filesystem(char *path, long *bsize_out,
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long long *blocks_out, long long *bfree_out,
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long long *bavail_out, long long *files_out,
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long long *ffree_out, void *fsid_out,
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int fsid_size, long *namelen_out,
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long *spare_out);
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extern int os_change_dir(char *dir);
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extern int os_fchange_dir(int fd);
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/* start_up.c */
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extern void os_early_checks(void);
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extern void can_do_skas(void);
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extern void os_check_bugs(void);
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extern void check_host_supports_tls(int *supports_tls, int *tls_min);
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/* mem.c */
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extern int create_mem_file(unsigned long long len);
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/* process.c */
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extern unsigned long os_process_pc(int pid);
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extern int os_process_parent(int pid);
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extern void os_stop_process(int pid);
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extern void os_kill_process(int pid, int reap_child);
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extern void os_kill_ptraced_process(int pid, int reap_child);
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extern long os_ptrace_ldt(long pid, long addr, long data);
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extern int os_getpid(void);
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extern int os_getpgrp(void);
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extern void init_new_thread_signals(void);
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extern int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr);
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extern int os_map_memory(void *virt, int fd, unsigned long long off,
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unsigned long len, int r, int w, int x);
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extern int os_protect_memory(void *addr, unsigned long len,
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int r, int w, int x);
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extern int os_unmap_memory(void *addr, int len);
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extern int os_drop_memory(void *addr, int length);
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extern int can_drop_memory(void);
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extern void os_flush_stdout(void);
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/* uaccess.c */
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extern unsigned long __do_user_copy(void *to, const void *from, int n,
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void **fault_addr, jmp_buf **fault_catcher,
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void (*op)(void *to, const void *from,
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int n), int *faulted_out);
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/* execvp.c */
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extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
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/* helper.c */
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extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
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extern int run_helper_thread(int (*proc)(void *), void *arg,
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unsigned int flags, unsigned long *stack_out);
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extern int helper_wait(int pid);
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/* tls.c */
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extern int os_set_thread_area(user_desc_t *info, int pid);
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extern int os_get_thread_area(user_desc_t *info, int pid);
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/* umid.c */
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extern int umid_file_name(char *name, char *buf, int len);
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extern int set_umid(char *name);
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extern char *get_umid(void);
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/* signal.c */
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extern void timer_init(void);
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extern void set_sigstack(void *sig_stack, int size);
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extern void remove_sigstack(void);
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extern void set_handler(int sig, void (*handler)(int), int flags, ...);
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extern int change_sig(int signal, int on);
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extern void block_signals(void);
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extern void unblock_signals(void);
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extern int get_signals(void);
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extern int set_signals(int enable);
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/* util.c */
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extern void stack_protections(unsigned long address);
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extern int raw(int fd);
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extern void setup_machinename(char *machine_out);
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extern void setup_hostinfo(char *buf, int len);
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extern void os_dump_core(void) __attribute__ ((noreturn));
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/* time.c */
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extern void idle_sleep(unsigned long long nsecs);
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extern int set_interval(void);
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extern int timer_one_shot(int ticks);
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extern long long disable_timer(void);
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extern void uml_idle_timer(void);
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extern long long os_nsecs(void);
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/* skas/mem.c */
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extern long run_syscall_stub(struct mm_id * mm_idp,
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int syscall, unsigned long *args, long expected,
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void **addr, int done);
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extern long syscall_stub_data(struct mm_id * mm_idp,
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unsigned long *data, int data_count,
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void **addr, void **stub_addr);
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extern int map(struct mm_id * mm_idp, unsigned long virt,
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unsigned long len, int prot, int phys_fd,
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unsigned long long offset, int done, void **data);
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extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
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int done, void **data);
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extern int protect(struct mm_id * mm_idp, unsigned long addr,
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unsigned long len, unsigned int prot, int done, void **data);
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/* skas/process.c */
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extern int is_skas_winch(int pid, int fd, void *data);
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extern int start_userspace(unsigned long stub_stack);
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extern int copy_context_skas0(unsigned long stack, int pid);
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extern void userspace(struct uml_pt_regs *regs);
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extern int map_stub_pages(int fd, unsigned long code, unsigned long data,
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unsigned long stack);
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extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
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extern void switch_threads(jmp_buf *me, jmp_buf *you);
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extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
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extern void initial_thread_cb_skas(void (*proc)(void *),
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void *arg);
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extern void halt_skas(void);
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extern void reboot_skas(void);
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/* irq.c */
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extern int os_waiting_for_events(struct irq_fd *active_fds);
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extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds);
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extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
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struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2);
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extern void os_free_irq_later(struct irq_fd *active_fds,
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int irq, void *dev_id);
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extern int os_get_pollfd(int i);
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extern void os_set_pollfd(int i, int fd);
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extern void os_set_ioignore(void);
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/* sigio.c */
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extern int add_sigio_fd(int fd);
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extern int ignore_sigio_fd(int fd);
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extern void maybe_sigio_broken(int fd, int read);
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extern void sigio_broken(int fd, int read);
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/* sys-x86_64/prctl.c */
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extern int os_arch_prctl(int pid, int code, unsigned long *addr);
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/* tty.c */
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extern int get_pty(void);
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/* sys-$ARCH/task_size.c */
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extern unsigned long os_get_top_address(void);
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#endif
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