diff options
Diffstat (limited to 'sys/isa/syscons.c')
| -rw-r--r-- | sys/isa/syscons.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/sys/isa/syscons.c b/sys/isa/syscons.c index 000f9d733ee4..b996d39de587 100644 --- a/sys/isa/syscons.c +++ b/sys/isa/syscons.c @@ -25,7 +25,7 @@ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * - * $Id: syscons.c,v 1.268 1998/08/03 09:09:34 yokota Exp $ + * $Id: syscons.c,v 1.269 1998/08/03 09:15:36 yokota Exp $ */ #include "sc.h" @@ -184,6 +184,7 @@ static char vgaregs[MODE_PARAM_SIZE]; static char vgaregs2[MODE_PARAM_SIZE]; static int rows_offset = 1; static char *cut_buffer; +static int cut_buffer_size; static int mouse_level = 0; /* sysmouse protocol level */ static mousestatus_t mouse_status = { 0, 0, 0, 0, 0, 0 }; static u_short mouse_and_mask[16] = { @@ -720,7 +721,10 @@ scattach(struct isa_device *dev) scp = console[0]; if (crtc_vga) { - cut_buffer = (char *)malloc(scp->xsize*scp->ysize, M_DEVBUF, M_NOWAIT); + cut_buffer_size = scp->xsize * scp->ysize + 1; + cut_buffer = (char *)malloc(cut_buffer_size, M_DEVBUF, M_NOWAIT); + if (cut_buffer != NULL) + cut_buffer[0] = '\0'; } scp->scr_buf = (u_short *)malloc(scp->xsize*scp->ysize*sizeof(u_short), @@ -1289,7 +1293,7 @@ scioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) else psignal(cur_console->mouse_proc, cur_console->mouse_signal); } - else if (mouse->operation == MOUSE_ACTION) { + else if (mouse->operation == MOUSE_ACTION && cut_buffer != NULL) { /* process button presses */ if ((cur_console->mouse_buttons ^ mouse->u.data.buttons) && !(cur_console->status & UNKNOWN_MODE)) { @@ -1356,7 +1360,7 @@ scioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) break; } - if (cur_console->status & UNKNOWN_MODE) + if ((cur_console->status & UNKNOWN_MODE) || (cut_buffer == NULL)) break; switch (mouse->u.event.id) { @@ -1641,9 +1645,16 @@ scioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) scp->mouse_pos = scp->mouse_oldpos = scp->scr_buf + (scp->mouse_ypos / scp->font_size) * scp->xsize + scp->mouse_xpos / 8; - free(cut_buffer, M_DEVBUF); - cut_buffer = (char *)malloc(scp->xsize*scp->ysize, M_DEVBUF, M_NOWAIT); - cut_buffer[0] = 0x00; + /* allocate a larger cut buffer if necessary */ + if ((cut_buffer == NULL) + || (cut_buffer_size < scp->xsize * scp->ysize + 1)) { + if (cut_buffer != NULL) + free(cut_buffer, M_DEVBUF); + cut_buffer_size = scp->xsize * scp->ysize + 1; + cut_buffer = (char *)malloc(cut_buffer_size, M_DEVBUF, M_NOWAIT); + if (cut_buffer != NULL) + cut_buffer[0] = '\0'; + } splx(s); usp = scp->history; |