diff options
Diffstat (limited to 'gdb/remote-fileio.c')
| -rw-r--r-- | gdb/remote-fileio.c | 1314 |
1 files changed, 13 insertions, 1301 deletions
diff --git a/gdb/remote-fileio.c b/gdb/remote-fileio.c index e51f272..9a961f4 100644 --- a/gdb/remote-fileio.c +++ b/gdb/remote-fileio.c @@ -24,441 +24,14 @@ #include "gdbcmd.h" #include "remote.h" #include "gdb/fileio.h" -#include "gdb_wait.h" -#include "gdb_stat.h" #include "exceptions.h" #include "remote-fileio.h" +#include "target-fileio.h" -#include <fcntl.h> -#include <sys/time.h> -#ifdef __CYGWIN__ -#include <sys/cygwin.h> /* For cygwin_conv_to_full_posix_path. */ -#endif #include <signal.h> -static struct { - int *fd_map; - int fd_map_size; -} remote_fio_data; - -#define FIO_FD_INVALID -1 -#define FIO_FD_CONSOLE_IN -2 -#define FIO_FD_CONSOLE_OUT -3 - -static int remote_fio_system_call_allowed = 0; - -static int -remote_fileio_init_fd_map (void) -{ - int i; - - if (!remote_fio_data.fd_map) - { - remote_fio_data.fd_map = (int *) xmalloc (10 * sizeof (int)); - remote_fio_data.fd_map_size = 10; - remote_fio_data.fd_map[0] = FIO_FD_CONSOLE_IN; - remote_fio_data.fd_map[1] = FIO_FD_CONSOLE_OUT; - remote_fio_data.fd_map[2] = FIO_FD_CONSOLE_OUT; - for (i = 3; i < 10; ++i) - remote_fio_data.fd_map[i] = FIO_FD_INVALID; - } - return 3; -} - -static int -remote_fileio_resize_fd_map (void) -{ - int i = remote_fio_data.fd_map_size; - - if (!remote_fio_data.fd_map) - return remote_fileio_init_fd_map (); - remote_fio_data.fd_map_size += 10; - remote_fio_data.fd_map = - (int *) xrealloc (remote_fio_data.fd_map, - remote_fio_data.fd_map_size * sizeof (int)); - for (; i < remote_fio_data.fd_map_size; i++) - remote_fio_data.fd_map[i] = FIO_FD_INVALID; - return remote_fio_data.fd_map_size - 10; -} - -static int -remote_fileio_next_free_fd (void) -{ - int i; - - for (i = 0; i < remote_fio_data.fd_map_size; ++i) - if (remote_fio_data.fd_map[i] == FIO_FD_INVALID) - return i; - return remote_fileio_resize_fd_map (); -} - -static int -remote_fileio_fd_to_targetfd (int fd) -{ - int target_fd = remote_fileio_next_free_fd (); - remote_fio_data.fd_map[target_fd] = fd; - return target_fd; -} - -static int -remote_fileio_map_fd (int target_fd) -{ - remote_fileio_init_fd_map (); - if (target_fd < 0 || target_fd >= remote_fio_data.fd_map_size) - return FIO_FD_INVALID; - return remote_fio_data.fd_map[target_fd]; -} - -static void -remote_fileio_close_target_fd (int target_fd) -{ - remote_fileio_init_fd_map (); - if (target_fd >= 0 && target_fd < remote_fio_data.fd_map_size) - remote_fio_data.fd_map[target_fd] = FIO_FD_INVALID; -} - -static int -remote_fileio_oflags_to_host (long flags) -{ - int hflags = 0; - - if (flags & FILEIO_O_CREAT) - hflags |= O_CREAT; - if (flags & FILEIO_O_EXCL) - hflags |= O_EXCL; - if (flags & FILEIO_O_TRUNC) - hflags |= O_TRUNC; - if (flags & FILEIO_O_APPEND) - hflags |= O_APPEND; - if (flags & FILEIO_O_RDONLY) - hflags |= O_RDONLY; - if (flags & FILEIO_O_WRONLY) - hflags |= O_WRONLY; - if (flags & FILEIO_O_RDWR) - hflags |= O_RDWR; -/* On systems supporting binary and text mode, always open files in - binary mode. */ -#ifdef O_BINARY - hflags |= O_BINARY; -#endif - return hflags; -} - -static mode_t -remote_fileio_mode_to_host (long mode, int open_call) -{ - mode_t hmode = 0; - - if (!open_call) - { - if (mode & FILEIO_S_IFREG) - hmode |= S_IFREG; - if (mode & FILEIO_S_IFDIR) - hmode |= S_IFDIR; - if (mode & FILEIO_S_IFCHR) - hmode |= S_IFCHR; - } - if (mode & FILEIO_S_IRUSR) - hmode |= S_IRUSR; - if (mode & FILEIO_S_IWUSR) - hmode |= S_IWUSR; - if (mode & FILEIO_S_IXUSR) - hmode |= S_IXUSR; -#ifdef S_IRGRP - if (mode & FILEIO_S_IRGRP) - hmode |= S_IRGRP; -#endif -#ifdef S_IWGRP - if (mode & FILEIO_S_IWGRP) - hmode |= S_IWGRP; -#endif -#ifdef S_IXGRP - if (mode & FILEIO_S_IXGRP) - hmode |= S_IXGRP; -#endif - if (mode & FILEIO_S_IROTH) - hmode |= S_IROTH; -#ifdef S_IWOTH - if (mode & FILEIO_S_IWOTH) - hmode |= S_IWOTH; -#endif -#ifdef S_IXOTH - if (mode & FILEIO_S_IXOTH) - hmode |= S_IXOTH; -#endif - return hmode; -} - -static LONGEST -remote_fileio_mode_to_target (mode_t mode) -{ - mode_t tmode = 0; - - if (S_ISREG(mode)) - tmode |= FILEIO_S_IFREG; - if (S_ISDIR(mode)) - tmode |= FILEIO_S_IFDIR; - if (S_ISCHR(mode)) - tmode |= FILEIO_S_IFCHR; - if (mode & S_IRUSR) - tmode |= FILEIO_S_IRUSR; - if (mode & S_IWUSR) - tmode |= FILEIO_S_IWUSR; - if (mode & S_IXUSR) - tmode |= FILEIO_S_IXUSR; -#ifdef S_IRGRP - if (mode & S_IRGRP) - tmode |= FILEIO_S_IRGRP; -#endif -#ifdef S_IWRGRP - if (mode & S_IWGRP) - tmode |= FILEIO_S_IWGRP; -#endif -#ifdef S_IXGRP - if (mode & S_IXGRP) - tmode |= FILEIO_S_IXGRP; -#endif - if (mode & S_IROTH) - tmode |= FILEIO_S_IROTH; -#ifdef S_IWOTH - if (mode & S_IWOTH) - tmode |= FILEIO_S_IWOTH; -#endif -#ifdef S_IXOTH - if (mode & S_IXOTH) - tmode |= FILEIO_S_IXOTH; -#endif - return tmode; -} - -static int -remote_fileio_errno_to_target (int error) -{ - switch (error) - { - case EPERM: - return FILEIO_EPERM; - case ENOENT: - return FILEIO_ENOENT; - case EINTR: - return FILEIO_EINTR; - case EIO: - return FILEIO_EIO; - case EBADF: - return FILEIO_EBADF; - case EACCES: - return FILEIO_EACCES; - case EFAULT: - return FILEIO_EFAULT; - case EBUSY: - return FILEIO_EBUSY; - case EEXIST: - return FILEIO_EEXIST; - case ENODEV: - return FILEIO_ENODEV; - case ENOTDIR: - return FILEIO_ENOTDIR; - case EISDIR: - return FILEIO_EISDIR; - case EINVAL: - return FILEIO_EINVAL; - case ENFILE: - return FILEIO_ENFILE; - case EMFILE: - return FILEIO_EMFILE; - case EFBIG: - return FILEIO_EFBIG; - case ENOSPC: - return FILEIO_ENOSPC; - case ESPIPE: - return FILEIO_ESPIPE; - case EROFS: - return FILEIO_EROFS; - case ENOSYS: - return FILEIO_ENOSYS; - case ENAMETOOLONG: - return FILEIO_ENAMETOOLONG; - } - return FILEIO_EUNKNOWN; -} - -static int -remote_fileio_seek_flag_to_host (long num, int *flag) -{ - if (!flag) - return 0; - switch (num) - { - case FILEIO_SEEK_SET: - *flag = SEEK_SET; - break; - case FILEIO_SEEK_CUR: - *flag = SEEK_CUR; - break; - case FILEIO_SEEK_END: - *flag = SEEK_END; - break; - default: - return -1; - } - return 0; -} - -static int -remote_fileio_extract_long (char **buf, LONGEST *retlong) -{ - char *c; - int sign = 1; - - if (!buf || !*buf || !**buf || !retlong) - return -1; - c = strchr (*buf, ','); - if (c) - *c++ = '\0'; - else - c = strchr (*buf, '\0'); - while (strchr ("+-", **buf)) - { - if (**buf == '-') - sign = -sign; - ++*buf; - } - for (*retlong = 0; **buf; ++*buf) - { - *retlong <<= 4; - if (**buf >= '0' && **buf <= '9') - *retlong += **buf - '0'; - else if (**buf >= 'a' && **buf <= 'f') - *retlong += **buf - 'a' + 10; - else if (**buf >= 'A' && **buf <= 'F') - *retlong += **buf - 'A' + 10; - else - return -1; - } - *retlong *= sign; - *buf = c; - return 0; -} - -static int -remote_fileio_extract_int (char **buf, long *retint) -{ - int ret; - LONGEST retlong; - - if (!retint) - return -1; - ret = remote_fileio_extract_long (buf, &retlong); - if (!ret) - *retint = (long) retlong; - return ret; -} - -static int -remote_fileio_extract_ptr_w_len (char **buf, CORE_ADDR *ptrval, int *length) -{ - char *c; - LONGEST retlong; - - if (!buf || !*buf || !**buf || !ptrval || !length) - return -1; - c = strchr (*buf, '/'); - if (!c) - return -1; - *c++ = '\0'; - if (remote_fileio_extract_long (buf, &retlong)) - return -1; - *ptrval = (CORE_ADDR) retlong; - *buf = c; - if (remote_fileio_extract_long (buf, &retlong)) - return -1; - *length = (int) retlong; - return 0; -} - -/* Convert to big endian */ -static void -remote_fileio_to_be (LONGEST num, char *buf, int bytes) -{ - int i; - - for (i = 0; i < bytes; ++i) - buf[i] = (num >> (8 * (bytes - i - 1))) & 0xff; -} - -static void -remote_fileio_to_fio_uint (long num, fio_uint_t fnum) -{ - remote_fileio_to_be ((LONGEST) num, (char *) fnum, 4); -} - -static void -remote_fileio_to_fio_mode (mode_t num, fio_mode_t fnum) -{ - remote_fileio_to_be (remote_fileio_mode_to_target(num), (char *) fnum, 4); -} - -static void -remote_fileio_to_fio_time (time_t num, fio_time_t fnum) -{ - remote_fileio_to_be ((LONGEST) num, (char *) fnum, 4); -} - -static void -remote_fileio_to_fio_long (LONGEST num, fio_long_t fnum) -{ - remote_fileio_to_be (num, (char *) fnum, 8); -} - -static void -remote_fileio_to_fio_ulong (LONGEST num, fio_ulong_t fnum) -{ - remote_fileio_to_be (num, (char *) fnum, 8); -} - -static void -remote_fileio_to_fio_stat (struct stat *st, struct fio_stat *fst) -{ - LONGEST blksize; - - /* `st_dev' is set in the calling function */ - remote_fileio_to_fio_uint ((long) st->st_ino, fst->fst_ino); - remote_fileio_to_fio_mode (st->st_mode, fst->fst_mode); - remote_fileio_to_fio_uint ((long) st->st_nlink, fst->fst_nlink); - remote_fileio_to_fio_uint ((long) st->st_uid, fst->fst_uid); - remote_fileio_to_fio_uint ((long) st->st_gid, fst->fst_gid); - remote_fileio_to_fio_uint ((long) st->st_rdev, fst->fst_rdev); - remote_fileio_to_fio_ulong ((LONGEST) st->st_size, fst->fst_size); -#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE - blksize = st->st_blksize; -#else - blksize = 512; -#endif - remote_fileio_to_fio_ulong (blksize, fst->fst_blksize); -#if HAVE_STRUCT_STAT_ST_BLOCKS - remote_fileio_to_fio_ulong ((LONGEST) st->st_blocks, fst->fst_blocks); -#else - /* FIXME: This is correct for DJGPP, but other systems that don't - have st_blocks, if any, might prefer 512 instead of st_blksize. - (eliz, 30-12-2003) */ - remote_fileio_to_fio_ulong (((LONGEST) st->st_size + blksize - 1) - / blksize, - fst->fst_blocks); -#endif - remote_fileio_to_fio_time (st->st_atime, fst->fst_atime); - remote_fileio_to_fio_time (st->st_mtime, fst->fst_mtime); - remote_fileio_to_fio_time (st->st_ctime, fst->fst_ctime); -} - -static void -remote_fileio_to_fio_timeval (struct timeval *tv, struct fio_timeval *ftv) -{ - remote_fileio_to_fio_time (tv->tv_sec, ftv->ftv_sec); - remote_fileio_to_fio_long (tv->tv_usec, ftv->ftv_usec); -} static int remote_fio_ctrl_c_flag = 0; -static int remote_fio_no_longjmp = 0; #if defined (HAVE_SIGACTION) && defined (SA_RESTART) static struct sigaction remote_fio_sa; @@ -508,7 +81,7 @@ remote_fileio_ctrl_c_signal_handler (int signo) { remote_fileio_sig_set (SIG_IGN); remote_fio_ctrl_c_flag = 1; - if (!remote_fio_no_longjmp) + if (!target_fio_no_longjmp) deprecated_throw_reason (RETURN_QUIT); remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); } @@ -543,30 +116,6 @@ remote_fileio_reply (int retcode, int error) putpkt (buf); } -static void -remote_fileio_ioerror (void) -{ - remote_fileio_reply (-1, FILEIO_EIO); -} - -static void -remote_fileio_badfd (void) -{ - remote_fileio_reply (-1, FILEIO_EBADF); -} - -static void -remote_fileio_return_errno (int retcode) -{ - remote_fileio_reply (retcode, - retcode < 0 ? remote_fileio_errno_to_target (errno) : 0); -} - -static void -remote_fileio_return_success (int retcode) -{ - remote_fileio_reply (retcode, 0); -} /* Wrapper function for remote_write_bytes() which has the disadvantage to write only one packet, regardless of the requested number of bytes to @@ -586,791 +135,11 @@ remote_fileio_write_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len) return ret; } -static void -remote_fileio_func_open (char *buf) -{ - CORE_ADDR ptrval; - int length, retlength; - long num; - int flags, fd; - mode_t mode; - char *pathname; - struct stat st; - - /* 1. Parameter: Ptr to pathname / length incl. trailing zero */ - if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) - { - remote_fileio_ioerror (); - return; - } - /* 2. Parameter: open flags */ - if (remote_fileio_extract_int (&buf, &num)) - { - remote_fileio_ioerror (); - return; - } - flags = remote_fileio_oflags_to_host (num); - /* 3. Parameter: open mode */ - if (remote_fileio_extract_int (&buf, &num)) - { - remote_fileio_ioerror (); - return; - } - mode = remote_fileio_mode_to_host (num, 1); - - /* Request pathname using 'm' packet */ - pathname = alloca (length); - retlength = remote_read_bytes (ptrval, (gdb_byte *) pathname, length); - if (retlength != length) - { - remote_fileio_ioerror (); - return; - } - - /* Check if pathname exists and is not a regular file or directory. If so, - return an appropriate error code. Same for trying to open directories - for writing. */ - if (!stat (pathname, &st)) - { - if (!S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) - { - remote_fileio_reply (-1, FILEIO_ENODEV); - return; - } - if (S_ISDIR (st.st_mode) - && ((flags & O_WRONLY) == O_WRONLY || (flags & O_RDWR) == O_RDWR)) - { - remote_fileio_reply (-1, FILEIO_EISDIR); - return; - } - } - - remote_fio_no_longjmp = 1; - fd = open (pathname, flags, mode); - if (fd < 0) - { - remote_fileio_return_errno (-1); - return; - } - - fd = remote_fileio_fd_to_targetfd (fd); - remote_fileio_return_success (fd); -} - -static void -remote_fileio_func_close (char *buf) -{ - long num; - int fd; - - /* Parameter: file descriptor */ - if (remote_fileio_extract_int (&buf, &num)) - { - remote_fileio_ioerror (); - return; - } - fd = remote_fileio_map_fd ((int) num); - if (fd == FIO_FD_INVALID) - { - remote_fileio_badfd (); - return; - } - - remote_fio_no_longjmp = 1; - if (fd != FIO_FD_CONSOLE_IN && fd != FIO_FD_CONSOLE_OUT && close (fd)) - remote_fileio_return_errno (-1); - remote_fileio_close_target_fd ((int) num); - remote_fileio_return_success (0); -} static void -remote_fileio_func_read (char *buf) +set_ctrl_c_signal_handler(void) { - long target_fd, num; - LONGEST lnum; - CORE_ADDR ptrval; - int fd, ret, retlength; - gdb_byte *buffer; - size_t length; - off_t old_offset, new_offset; - - /* 1. Parameter: file descriptor */ - if (remote_fileio_extract_int (&buf, &target_fd)) - { - remote_fileio_ioerror (); - return; - } - fd = remote_fileio_map_fd ((int) target_fd); - if (fd == FIO_FD_INVALID) - { - remote_fileio_badfd (); - return; - } - /* 2. Parameter: buffer pointer */ - if (remote_fileio_extract_long (&buf, &lnum)) - { - remote_fileio_ioerror (); - return; - } - ptrval = (CORE_ADDR) lnum; - /* 3. Parameter: buffer length */ - if (remote_fileio_extract_int (&buf, &num)) - { - remote_fileio_ioerror (); - return; - } - length = (size_t) num; - - switch (fd) - { - case FIO_FD_CONSOLE_OUT: - remote_fileio_badfd (); - return; - case FIO_FD_CONSOLE_IN: - { - static char *remaining_buf = NULL; - static int remaining_length = 0; - - buffer = (gdb_byte *) xmalloc (32768); - if (remaining_buf) - { - remote_fio_no_longjmp = 1; - if (remaining_length > length) - { - memcpy (buffer, remaining_buf, length); - memmove (remaining_buf, remaining_buf + length, - remaining_length - length); - remaining_length -= length; - ret = length; - } - else - { - memcpy (buffer, remaining_buf, remaining_length); - xfree (remaining_buf); - remaining_buf = NULL; - ret = remaining_length; - } - } - else - { - ret = ui_file_read (gdb_stdtargin, (char *) buffer, 32767); - remote_fio_no_longjmp = 1; - if (ret > 0 && (size_t)ret > length) - { - remaining_buf = (char *) xmalloc (ret - length); - remaining_length = ret - length; - memcpy (remaining_buf, buffer + length, remaining_length); - ret = length; - } - } - } - break; - default: - buffer = (gdb_byte *) xmalloc (length); - /* POSIX defines EINTR behaviour of read in a weird way. It's allowed - for read() to return -1 even if "some" bytes have been read. It - has been corrected in SUSv2 but that doesn't help us much... - Therefore a complete solution must check how many bytes have been - read on EINTR to return a more reliable value to the target */ - old_offset = lseek (fd, 0, SEEK_CUR); - remote_fio_no_longjmp = 1; - ret = read (fd, buffer, length); - if (ret < 0 && errno == EINTR) - { - new_offset = lseek (fd, 0, SEEK_CUR); - /* If some data has been read, return the number of bytes read. - The Ctrl-C flag is set in remote_fileio_reply() anyway */ - if (old_offset != new_offset) - ret = new_offset - old_offset; - } - break; - } - - if (ret > 0) - { - retlength = remote_fileio_write_bytes (ptrval, buffer, ret); - if (retlength != ret) - ret = -1; /* errno has been set to EIO in remote_fileio_write_bytes() */ - } - - if (ret < 0) - remote_fileio_return_errno (-1); - else - remote_fileio_return_success (ret); - - xfree (buffer); -} - -static void -remote_fileio_func_write (char *buf) -{ - long target_fd, num; - LONGEST lnum; - CORE_ADDR ptrval; - int fd, ret, retlength; - gdb_byte *buffer; - size_t length; - - /* 1. Parameter: file descriptor */ - if (remote_fileio_extract_int (&buf, &target_fd)) - { - remote_fileio_ioerror (); - return; - } - fd = remote_fileio_map_fd ((int) target_fd); - if (fd == FIO_FD_INVALID) - { - remote_fileio_badfd (); - return; - } - /* 2. Parameter: buffer pointer */ - if (remote_fileio_extract_long (&buf, &lnum)) - { - remote_fileio_ioerror (); - return; - } - ptrval = (CORE_ADDR) lnum; - /* 3. Parameter: buffer length */ - if (remote_fileio_extract_int (&buf, &num)) - { - remote_fileio_ioerror (); - return; - } - length = (size_t) num; - - buffer = (gdb_byte *) xmalloc (length); - retlength = remote_read_bytes (ptrval, buffer, length); - if (retlength != length) - { - xfree (buffer); - remote_fileio_ioerror (); - return; - } - - remote_fio_no_longjmp = 1; - switch (fd) - { - case FIO_FD_CONSOLE_IN: - remote_fileio_badfd (); - xfree (buffer); - return; - case FIO_FD_CONSOLE_OUT: - ui_file_write (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr, - (char *) buffer, length); - gdb_flush (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr); - ret = length; - break; - default: - ret = write (fd, buffer, length); - if (ret < 0 && errno == EACCES) - errno = EBADF; /* Cygwin returns EACCESS when writing to a R/O file.*/ - break; - } - - if (ret < 0) - remote_fileio_return_errno (-1); - else - remote_fileio_return_success (ret); - - xfree (buffer); -} - -static void -remote_fileio_func_lseek (char *buf) -{ - long num; - LONGEST lnum; - int fd, flag; - off_t offset, ret; - - /* 1. Parameter: file descriptor */ - if (remote_fileio_extract_int (&buf, &num)) - { - remote_fileio_ioerror (); - return; - } - fd = remote_fileio_map_fd ((int) num); - if (fd == FIO_FD_INVALID) - { - remote_fileio_badfd (); - return; - } - else if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT) - { - remote_fileio_reply (-1, FILEIO_ESPIPE); - return; - } - - /* 2. Parameter: offset */ - if (remote_fileio_extract_long (&buf, &lnum)) - { - remote_fileio_ioerror (); - return; - } - offset = (off_t) lnum; - /* 3. Parameter: flag */ - if (remote_fileio_extract_int (&buf, &num)) - { - remote_fileio_ioerror (); - return; - } - if (remote_fileio_seek_flag_to_host (num, &flag)) - { - remote_fileio_reply (-1, FILEIO_EINVAL); - return; - } - - remote_fio_no_longjmp = 1; - ret = lseek (fd, offset, flag); - - if (ret == (off_t) -1) - remote_fileio_return_errno (-1); - else - remote_fileio_return_success (ret); -} - -static void -remote_fileio_func_rename (char *buf) -{ - CORE_ADDR old_ptr, new_ptr; - int old_len, new_len, retlength; - char *oldpath, *newpath; - int ret, of, nf; - struct stat ost, nst; - - /* 1. Parameter: Ptr to oldpath / length incl. trailing zero */ - if (remote_fileio_extract_ptr_w_len (&buf, &old_ptr, &old_len)) - { - remote_fileio_ioerror (); - return; - } - - /* 2. Parameter: Ptr to newpath / length incl. trailing zero */ - if (remote_fileio_extract_ptr_w_len (&buf, &new_ptr, &new_len)) - { - remote_fileio_ioerror (); - return; - } - - /* Request oldpath using 'm' packet */ - oldpath = alloca (old_len); - retlength = remote_read_bytes (old_ptr, (gdb_byte *) oldpath, old_len); - if (retlength != old_len) - { - remote_fileio_ioerror (); - return; - } - - /* Request newpath using 'm' packet */ - newpath = alloca (new_len); - retlength = remote_read_bytes (new_ptr, (gdb_byte *) newpath, new_len); - if (retlength != new_len) - { - remote_fileio_ioerror (); - return; - } - - /* Only operate on regular files and directories */ - of = stat (oldpath, &ost); - nf = stat (newpath, &nst); - if ((!of && !S_ISREG (ost.st_mode) && !S_ISDIR (ost.st_mode)) - || (!nf && !S_ISREG (nst.st_mode) && !S_ISDIR (nst.st_mode))) - { - remote_fileio_reply (-1, FILEIO_EACCES); - return; - } - - remote_fio_no_longjmp = 1; - ret = rename (oldpath, newpath); - - if (ret == -1) - { - /* Special case: newpath is a non-empty directory. Some systems - return ENOTEMPTY, some return EEXIST. We coerce that to be - always EEXIST. */ - if (errno == ENOTEMPTY) - errno = EEXIST; -#ifdef __CYGWIN__ - /* Workaround some Cygwin problems with correct errnos. */ - if (errno == EACCES) - { - if (!of && !nf && S_ISDIR (nst.st_mode)) - { - if (S_ISREG (ost.st_mode)) - errno = EISDIR; - else - { - char oldfullpath[PATH_MAX + 1]; - char newfullpath[PATH_MAX + 1]; - int len; - - cygwin_conv_to_full_posix_path (oldpath, oldfullpath); - cygwin_conv_to_full_posix_path (newpath, newfullpath); - len = strlen (oldfullpath); - if (newfullpath[len] == '/' - && !strncmp (oldfullpath, newfullpath, len)) - errno = EINVAL; - else - errno = EEXIST; - } - } - } -#endif - - remote_fileio_return_errno (-1); - } - else - remote_fileio_return_success (ret); -} - -static void -remote_fileio_func_unlink (char *buf) -{ - CORE_ADDR ptrval; - int length, retlength; - char *pathname; - int ret; - struct stat st; - - /* Parameter: Ptr to pathname / length incl. trailing zero */ - if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) - { - remote_fileio_ioerror (); - return; - } - /* Request pathname using 'm' packet */ - pathname = alloca (length); - retlength = remote_read_bytes (ptrval, (gdb_byte *) pathname, length); - if (retlength != length) - { - remote_fileio_ioerror (); - return; - } - - /* Only operate on regular files (and directories, which allows to return - the correct return code) */ - if (!stat (pathname, &st) && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) - { - remote_fileio_reply (-1, FILEIO_ENODEV); - return; - } - - remote_fio_no_longjmp = 1; - ret = unlink (pathname); - - if (ret == -1) - remote_fileio_return_errno (-1); - else - remote_fileio_return_success (ret); -} - -static void -remote_fileio_func_stat (char *buf) -{ - CORE_ADDR statptr, nameptr; - int ret, namelength, retlength; - char *pathname; - LONGEST lnum; - struct stat st; - struct fio_stat fst; - - /* 1. Parameter: Ptr to pathname / length incl. trailing zero */ - if (remote_fileio_extract_ptr_w_len (&buf, &nameptr, &namelength)) - { - remote_fileio_ioerror (); - return; - } - - /* 2. Parameter: Ptr to struct stat */ - if (remote_fileio_extract_long (&buf, &lnum)) - { - remote_fileio_ioerror (); - return; - } - statptr = (CORE_ADDR) lnum; - - /* Request pathname using 'm' packet */ - pathname = alloca (namelength); - retlength = remote_read_bytes (nameptr, (gdb_byte *) pathname, namelength); - if (retlength != namelength) - { - remote_fileio_ioerror (); - return; - } - - remote_fio_no_longjmp = 1; - ret = stat (pathname, &st); - - if (ret == -1) - { - remote_fileio_return_errno (-1); - return; - } - /* Only operate on regular files and directories */ - if (!ret && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) - { - remote_fileio_reply (-1, FILEIO_EACCES); - return; - } - if (statptr) - { - remote_fileio_to_fio_stat (&st, &fst); - remote_fileio_to_fio_uint (0, fst.fst_dev); - - retlength = remote_fileio_write_bytes (statptr, - (gdb_byte *) &fst, sizeof fst); - if (retlength != sizeof fst) - { - remote_fileio_return_errno (-1); - return; - } - } - remote_fileio_return_success (ret); -} - -static void -remote_fileio_func_fstat (char *buf) -{ - CORE_ADDR ptrval; - int fd, ret, retlength; - long target_fd; - LONGEST lnum; - struct stat st; - struct fio_stat fst; - struct timeval tv; - - /* 1. Parameter: file descriptor */ - if (remote_fileio_extract_int (&buf, &target_fd)) - { - remote_fileio_ioerror (); - return; - } - fd = remote_fileio_map_fd ((int) target_fd); - if (fd == FIO_FD_INVALID) - { - remote_fileio_badfd (); - return; - } - /* 2. Parameter: Ptr to struct stat */ - if (remote_fileio_extract_long (&buf, &lnum)) - { - remote_fileio_ioerror (); - return; - } - ptrval = (CORE_ADDR) lnum; - - remote_fio_no_longjmp = 1; - if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT) - { - remote_fileio_to_fio_uint (1, fst.fst_dev); - st.st_mode = S_IFCHR | (fd == FIO_FD_CONSOLE_IN ? S_IRUSR : S_IWUSR); - st.st_nlink = 1; -#ifdef HAVE_GETUID - st.st_uid = getuid (); -#else - st.st_uid = 0; -#endif -#ifdef HAVE_GETGID - st.st_gid = getgid (); -#else - st.st_gid = 0; -#endif - st.st_rdev = 0; - st.st_size = 0; -#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE - st.st_blksize = 512; -#endif -#if HAVE_STRUCT_STAT_ST_BLOCKS - st.st_blocks = 0; -#endif - if (!gettimeofday (&tv, NULL)) - st.st_atime = st.st_mtime = st.st_ctime = tv.tv_sec; - else - st.st_atime = st.st_mtime = st.st_ctime = (time_t) 0; - ret = 0; - } - else - ret = fstat (fd, &st); - - if (ret == -1) - { - remote_fileio_return_errno (-1); - return; - } - if (ptrval) - { - remote_fileio_to_fio_stat (&st, &fst); - - retlength = remote_fileio_write_bytes (ptrval, (gdb_byte *) &fst, sizeof fst); - if (retlength != sizeof fst) - { - remote_fileio_return_errno (-1); - return; - } - } - remote_fileio_return_success (ret); -} - -static void -remote_fileio_func_gettimeofday (char *buf) -{ - LONGEST lnum; - CORE_ADDR ptrval; - int ret, retlength; - struct timeval tv; - struct fio_timeval ftv; - - /* 1. Parameter: struct timeval pointer */ - if (remote_fileio_extract_long (&buf, &lnum)) - { - remote_fileio_ioerror (); - return; - } - ptrval = (CORE_ADDR) lnum; - /* 2. Parameter: some pointer value... */ - if (remote_fileio_extract_long (&buf, &lnum)) - { - remote_fileio_ioerror (); - return; - } - /* ...which has to be NULL */ - if (lnum) - { - remote_fileio_reply (-1, FILEIO_EINVAL); - return; - } - - remote_fio_no_longjmp = 1; - ret = gettimeofday (&tv, NULL); - - if (ret == -1) - { - remote_fileio_return_errno (-1); - return; - } - - if (ptrval) - { - remote_fileio_to_fio_timeval (&tv, &ftv); - - retlength = remote_fileio_write_bytes (ptrval, (gdb_byte *) &ftv, sizeof ftv); - if (retlength != sizeof ftv) - { - remote_fileio_return_errno (-1); - return; - } - } - remote_fileio_return_success (ret); -} - -static void -remote_fileio_func_isatty (char *buf) -{ - long target_fd; - int fd; - - /* Parameter: file descriptor */ - if (remote_fileio_extract_int (&buf, &target_fd)) - { - remote_fileio_ioerror (); - return; - } - remote_fio_no_longjmp = 1; - fd = remote_fileio_map_fd ((int) target_fd); - remote_fileio_return_success (fd == FIO_FD_CONSOLE_IN || - fd == FIO_FD_CONSOLE_OUT ? 1 : 0); -} - -static void -remote_fileio_func_system (char *buf) -{ - CORE_ADDR ptrval; - int ret, length, retlength; - char *cmdline = NULL; - - /* Parameter: Ptr to commandline / length incl. trailing zero */ - if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) - { - remote_fileio_ioerror (); - return; - } - - if (length) - { - /* Request commandline using 'm' packet */ - cmdline = alloca (length); - retlength = remote_read_bytes (ptrval, (gdb_byte *) cmdline, length); - if (retlength != length) - { - remote_fileio_ioerror (); - return; - } - } - - /* Check if system(3) has been explicitely allowed using the - `set remote system-call-allowed 1' command. If length is 0, - indicating a NULL parameter to the system call, return zero to - indicate a shell is not available. Otherwise fail with EPERM. */ - if (!remote_fio_system_call_allowed) - { - if (!length) - remote_fileio_return_success (0); - else - remote_fileio_reply (-1, FILEIO_EPERM); - return; - } - - remote_fio_no_longjmp = 1; - ret = system (cmdline); - - if (!length) - remote_fileio_return_success (ret); - else if (ret == -1) - remote_fileio_return_errno (-1); - else - remote_fileio_return_success (WEXITSTATUS (ret)); -} - -static struct { - char *name; - void (*func)(char *); -} remote_fio_func_map[] = { - { "open", remote_fileio_func_open }, - { "close", remote_fileio_func_close }, - { "read", remote_fileio_func_read }, - { "write", remote_fileio_func_write }, - { "lseek", remote_fileio_func_lseek }, - { "rename", remote_fileio_func_rename }, - { "unlink", remote_fileio_func_unlink }, - { "stat", remote_fileio_func_stat }, - { "fstat", remote_fileio_func_fstat }, - { "gettimeofday", remote_fileio_func_gettimeofday }, - { "isatty", remote_fileio_func_isatty }, - { "system", remote_fileio_func_system }, - { NULL, NULL } -}; - -static int -do_remote_fileio_request (struct ui_out *uiout, void *buf_arg) -{ - char *buf = buf_arg; - char *c; - int idx; - remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); - - c = strchr (++buf, ','); - if (c) - *c++ = '\0'; - else - c = strchr (buf, '\0'); - for (idx = 0; remote_fio_func_map[idx].name; ++idx) - if (!strcmp (remote_fio_func_map[idx].name, buf)) - break; - if (!remote_fio_func_map[idx].name) /* ERROR: No such function. */ - return RETURN_ERROR; - remote_fio_func_map[idx].func (c); - return 0; } /* Close any open descriptors, and reinitialize the file mapping. */ @@ -1378,85 +147,28 @@ do_remote_fileio_request (struct ui_out *uiout, void *buf_arg) void remote_fileio_reset (void) { - int ix; - - for (ix = 0; ix != remote_fio_data.fd_map_size; ix++) - { - int fd = remote_fio_data.fd_map[ix]; - - if (fd >= 0) - close (fd); - } - if (remote_fio_data.fd_map) - { - free (remote_fio_data.fd_map); - remote_fio_data.fd_map = NULL; - remote_fio_data.fd_map_size = 0; - } + target_fileio_reset(); } void remote_fileio_request (char *buf) { - int ex; + static struct file_io_operations operations = + { + remote_read_bytes, + remote_fileio_write_bytes, + remote_fileio_reply, + set_ctrl_c_signal_handler + }; remote_fileio_sig_init (); - - remote_fio_ctrl_c_flag = 0; - remote_fio_no_longjmp = 0; - - ex = catch_exceptions (uiout, do_remote_fileio_request, (void *)buf, - RETURN_MASK_ALL); - switch (ex) - { - case RETURN_ERROR: - remote_fileio_reply (-1, FILEIO_ENOSYS); - break; - case RETURN_QUIT: - remote_fileio_reply (-1, FILEIO_EINTR); - break; - default: - break; - } - + target_fileio_request(buf, &operations); remote_fileio_sig_exit (); } -static void -set_system_call_allowed (char *args, int from_tty) -{ - if (args) - { - char *arg_end; - int val = strtoul (args, &arg_end, 10); - if (*args && *arg_end == '\0') - { - remote_fio_system_call_allowed = !!val; - return; - } - } - error (_("Illegal argument for \"set remote system-call-allowed\" command")); -} - -static void -show_system_call_allowed (char *args, int from_tty) -{ - if (args) - error (_("Garbage after \"show remote system-call-allowed\" command: `%s'"), args); - printf_unfiltered ("Calling host system(3) call from target is %sallowed\n", - remote_fio_system_call_allowed ? "" : "not "); -} - void initialize_remote_fileio (struct cmd_list_element *remote_set_cmdlist, struct cmd_list_element *remote_show_cmdlist) { - add_cmd ("system-call-allowed", no_class, - set_system_call_allowed, - _("Set if the host system(3) call is allowed for the target."), - &remote_set_cmdlist); - add_cmd ("system-call-allowed", no_class, - show_system_call_allowed, - _("Show if the host system(3) call is allowed for the target."), - &remote_show_cmdlist); + initialize_target_fileio(remote_set_cmdlist, remote_show_cmdlist); } |