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https://github.com/brain-hackers/u-boot-brain
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60d7d5a631
Most of the various environment functions create CONFIG_ENV_SIZE buffers on the stack. At least on ARM and PPC which have 4KB stacks, this can overflow the stack if we have large environment sizes. So move all the buffers off the stack to static buffers. Signed-off-by: Rob Herring <rob.herring@calxeda.com>
161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
/*
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* (c) Copyright 2011 by Tigris Elektronik GmbH
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*
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* Author:
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* Maximilian Schwerin <mvs@tigris.de>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <linux/stddef.h>
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#include <malloc.h>
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#include <search.h>
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#include <errno.h>
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#include <fat.h>
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#include <mmc.h>
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char *env_name_spec = "FAT";
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env_t *env_ptr;
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static char env_buf[CONFIG_ENV_SIZE];
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DECLARE_GLOBAL_DATA_PTR;
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int env_init(void)
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{
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/* use default */
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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return 0;
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}
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#ifdef CONFIG_CMD_SAVEENV
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int saveenv(void)
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{
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env_t *env_new = env_buf;
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ssize_t len;
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char *res;
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block_dev_desc_t *dev_desc = NULL;
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int dev = FAT_ENV_DEVICE;
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int part = FAT_ENV_PART;
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int err;
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res = (char *)env_new->data;
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len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
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if (len < 0) {
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error("Cannot export environment: errno = %d\n", errno);
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return 1;
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}
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#ifdef CONFIG_MMC
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if (strcmp(FAT_ENV_INTERFACE, "mmc") == 0) {
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struct mmc *mmc = find_mmc_device(dev);
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if (!mmc) {
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printf("no mmc device at slot %x\n", dev);
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return 1;
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}
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mmc->has_init = 0;
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mmc_init(mmc);
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}
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#endif /* CONFIG_MMC */
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dev_desc = get_dev(FAT_ENV_INTERFACE, dev);
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if (dev_desc == NULL) {
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printf("Failed to find %s%d\n",
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FAT_ENV_INTERFACE, dev);
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return 1;
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}
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err = fat_register_device(dev_desc, part);
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if (err) {
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printf("Failed to register %s%d:%d\n",
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FAT_ENV_INTERFACE, dev, part);
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return 1;
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}
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env_new->crc = crc32(0, env_new->data, ENV_SIZE);
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err = file_fat_write(FAT_ENV_FILE, (void *)env_new, sizeof(env_t));
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if (err == -1) {
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printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
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FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
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return 1;
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}
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puts("done\n");
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return 0;
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}
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#endif /* CONFIG_CMD_SAVEENV */
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void env_relocate_spec(void)
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{
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char *buf = env_buf;
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block_dev_desc_t *dev_desc = NULL;
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int dev = FAT_ENV_DEVICE;
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int part = FAT_ENV_PART;
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int err;
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#ifdef CONFIG_MMC
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if (strcmp(FAT_ENV_INTERFACE, "mmc") == 0) {
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struct mmc *mmc = find_mmc_device(dev);
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if (!mmc) {
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printf("no mmc device at slot %x\n", dev);
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set_default_env(NULL);
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return;
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}
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mmc->has_init = 0;
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mmc_init(mmc);
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}
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#endif /* CONFIG_MMC */
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dev_desc = get_dev(FAT_ENV_INTERFACE, dev);
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if (dev_desc == NULL) {
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printf("Failed to find %s%d\n",
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FAT_ENV_INTERFACE, dev);
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set_default_env(NULL);
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return;
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}
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err = fat_register_device(dev_desc, part);
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if (err) {
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printf("Failed to register %s%d:%d\n",
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FAT_ENV_INTERFACE, dev, part);
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set_default_env(NULL);
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return;
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}
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err = file_fat_read(FAT_ENV_FILE, (uchar *)&buf, CONFIG_ENV_SIZE);
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if (err == -1) {
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printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
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FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
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set_default_env(NULL);
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return;
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}
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env_import(buf, 1);
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}
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