ced875130d
Uses of mallocarray(9). The use of mallocarray(9) has rocketed the required swap to build FreeBSD. This is likely caused by the allocation size attributes which put extra pressure on the compiler. Given that most of these checks are superfluous we have to choose better where to use mallocarray(9). We still have more uses of mallocarray(9) but hopefully this is enough to bring swap usage to a reasonable level. Reported by: wosch PR: 225197
218 lines
5.1 KiB
C
218 lines
5.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer as
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* the first lines of this file unmodified.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_splash.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/linker.h>
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#include <sys/fbio.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <dev/fb/fbreg.h>
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#include <dev/fb/splashreg.h>
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MODULE_VERSION(splash, 1);
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/* video adapter and image decoder */
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static video_adapter_t *splash_adp;
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static splash_decoder_t *splash_decoder;
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/* decoder candidates */
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static int decoders;
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static splash_decoder_t **decoder_set;
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#define DECODER_ARRAY_DELTA 4
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/* console driver callback */
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static int (*splash_callback)(int, void *);
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static void *splash_arg;
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static int
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splash_find_data(splash_decoder_t *decoder)
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{
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caddr_t image_module;
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void *ptr;
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size_t sz;
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if (decoder->data_type == NULL)
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return (0);
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image_module = preload_search_by_type(decoder->data_type);
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if (image_module == NULL)
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return (ENOENT);
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ptr = preload_fetch_addr(image_module);
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sz = preload_fetch_size(image_module);
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if (ptr == NULL || sz == 0)
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return (ENOENT);
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if (bootverbose)
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printf("splash: image@%p, size:%zu\n", ptr, sz);
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decoder->data = ptr;
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decoder->data_size = sz;
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return (0);
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}
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static int
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splash_test(splash_decoder_t *decoder)
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{
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if (splash_find_data(decoder))
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return ENOENT; /* XXX */
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if (*decoder->init && (*decoder->init)(splash_adp)) {
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decoder->data = NULL;
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decoder->data_size = 0;
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return ENODEV; /* XXX */
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}
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if (bootverbose)
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printf("splash: image decoder found: %s\n", decoder->name);
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return 0;
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}
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static void
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splash_new(splash_decoder_t *decoder)
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{
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splash_decoder = decoder;
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if (splash_callback != NULL)
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(*splash_callback)(SPLASH_INIT, splash_arg);
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}
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int
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splash_register(splash_decoder_t *decoder)
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{
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splash_decoder_t **p;
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int error;
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int i;
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if (splash_adp != NULL) {
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/*
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* If the video card has already been initialized, test
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* this decoder immediately.
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*/
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error = splash_test(decoder);
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if (error == 0) {
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/* replace the current decoder with new one */
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if (splash_decoder != NULL)
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error = splash_term(splash_adp);
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if (error == 0)
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splash_new(decoder);
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}
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return error;
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} else {
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/* register the decoder for later use */
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for (i = 0; i < decoders; ++i) {
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if (decoder_set[i] == NULL)
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break;
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}
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if ((i >= decoders) && (decoders % DECODER_ARRAY_DELTA) == 0) {
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p = malloc(sizeof(*p)*(decoders + DECODER_ARRAY_DELTA),
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M_DEVBUF, M_NOWAIT);
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if (p == NULL)
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return ENOMEM;
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if (decoder_set != NULL) {
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bcopy(decoder_set, p, sizeof(*p)*decoders);
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free(decoder_set, M_DEVBUF);
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}
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decoder_set = p;
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i = decoders++;
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}
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decoder_set[i] = decoder;
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}
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return 0;
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}
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int
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splash_unregister(splash_decoder_t *decoder)
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{
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int error;
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if (splash_decoder == decoder) {
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if ((error = splash_term(splash_adp)) != 0)
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return error;
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}
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return 0;
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}
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int
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splash_init(video_adapter_t *adp, int (*callback)(int, void *), void *arg)
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{
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int i;
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splash_adp = adp;
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splash_callback = callback;
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splash_arg = arg;
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splash_decoder = NULL;
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for (i = 0; i < decoders; ++i) {
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if (decoder_set[i] == NULL)
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continue;
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if (splash_test(decoder_set[i]) == 0) {
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splash_new(decoder_set[i]);
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break;
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}
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decoder_set[i] = NULL;
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}
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for (++i; i < decoders; ++i) {
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decoder_set[i] = NULL;
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}
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return 0;
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}
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int
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splash_term(video_adapter_t *adp)
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{
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int error = 0;
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if (splash_adp != adp)
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return EINVAL;
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if (splash_decoder != NULL) {
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if (splash_callback != NULL)
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error = (*splash_callback)(SPLASH_TERM, splash_arg);
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if (error == 0 && splash_decoder->term)
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error = (*splash_decoder->term)(adp);
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if (error == 0)
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splash_decoder = NULL;
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}
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return error;
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}
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int
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splash(video_adapter_t *adp, int on)
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{
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if (splash_decoder != NULL)
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return (*splash_decoder->splash)(adp, on);
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return ENODEV;
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}
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