mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
f41325db5f
Replace the a.out emulation of 'struct linker_set' with something a little more flexible. <sys/linker_set.h> now provides macros for accessing elements and completely hides the implementation. The linker_set.h macros have been on the back burner in various forms since 1998 and has ideas and code from Mike Smith (SET_FOREACH()), John Polstra (ELF clue) and myself (cleaned up API and the conversion of the rest of the kernel to use it). The macros declare a strongly typed set. They return elements with the type that you declare the set with, rather than a generic void *. For ELF, we use the magic ld symbols (__start_<setname> and __stop_<setname>). Thanks to Richard Henderson <rth@redhat.com> for the trick about how to force ld to provide them for kld's. For a.out, we use the old linker_set struct. NOTE: the item lists are no longer null terminated. This is why the code impact is high in certain areas. The runtime linker has a new method to find the linker set boundaries depending on which backend format is in use. linker sets are still module/kld unfriendly and should never be used for anything that may be modular one day. Reviewed by: eivind
126 lines
3.0 KiB
C
126 lines
3.0 KiB
C
/*-
|
|
* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer as
|
|
* the first lines of this file unmodified.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_syscons.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/consio.h>
|
|
|
|
#include <dev/syscons/syscons.h>
|
|
#include <dev/syscons/sctermvar.h>
|
|
|
|
SET_DECLARE(scterm_set, sc_term_sw_t);
|
|
|
|
/* exported subroutines */
|
|
|
|
void
|
|
sc_move_cursor(scr_stat *scp, int x, int y)
|
|
{
|
|
if (x < 0)
|
|
x = 0;
|
|
if (y < 0)
|
|
y = 0;
|
|
if (x >= scp->xsize)
|
|
x = scp->xsize - 1;
|
|
if (y >= scp->ysize)
|
|
y = scp->ysize - 1;
|
|
scp->xpos = x;
|
|
scp->ypos = y;
|
|
scp->cursor_pos = scp->ypos*scp->xsize + scp->xpos;
|
|
}
|
|
|
|
void
|
|
sc_clear_screen(scr_stat *scp)
|
|
{
|
|
(*scp->tsw->te_clear)(scp);
|
|
scp->cursor_oldpos = scp->cursor_pos;
|
|
sc_remove_cutmarking(scp);
|
|
}
|
|
|
|
/* terminal emulator manager routines */
|
|
|
|
static LIST_HEAD(, sc_term_sw) sc_term_list =
|
|
LIST_HEAD_INITIALIZER(sc_term_list);
|
|
|
|
int
|
|
sc_term_add(sc_term_sw_t *sw)
|
|
{
|
|
LIST_INSERT_HEAD(&sc_term_list, sw, link);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
sc_term_remove(sc_term_sw_t *sw)
|
|
{
|
|
LIST_REMOVE(sw, link);
|
|
return 0;
|
|
}
|
|
|
|
sc_term_sw_t
|
|
*sc_term_match(char *name)
|
|
{
|
|
sc_term_sw_t **list;
|
|
sc_term_sw_t *p;
|
|
|
|
if (!LIST_EMPTY(&sc_term_list)) {
|
|
LIST_FOREACH(p, &sc_term_list, link) {
|
|
if ((strcmp(name, p->te_name) == 0)
|
|
|| (strcmp(name, "*") == 0)) {
|
|
return p;
|
|
}
|
|
}
|
|
} else {
|
|
SET_FOREACH(list, scterm_set) {
|
|
p = *list;
|
|
if ((strcmp(name, p->te_name) == 0)
|
|
|| (strcmp(name, "*") == 0)) {
|
|
return p;
|
|
}
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
sc_term_sw_t
|
|
*sc_term_match_by_number(int index)
|
|
{
|
|
sc_term_sw_t *p;
|
|
|
|
if (index <= 0)
|
|
return NULL;
|
|
LIST_FOREACH(p, &sc_term_list, link) {
|
|
if (--index <= 0)
|
|
return p;
|
|
}
|
|
|
|
return NULL;
|
|
}
|