+/*
+ * Copyright (C) 2009 Sony Computer Entertainment Inc.
+ * Copyright 2009 Sony Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#define _GNU_SOURCE
+
+#include <assert.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include "log/log.h"
+#include <system/system.h>
+#include "talloc/talloc.h"
+#include "loader.h"
+#include "ui-system.h"
+
+/**
+ * run_kexec_local - Final kexec helper.
+ * @l_image: The local image file for kexec to execute.
+ * @l_initrd: Optional local initrd file for kexec --initrd, can be NULL.
+ * @args: Optional command line args for kexec --append, can be NULL.
+ */
+
+static int run_kexec_local(const char *l_image, const char *l_initrd,
+ const char *args)
+{
+ int result;
+ const char *argv[8];
+ const char **p;
+
+ p = argv;
+ *p++ = pb_system_apps.kexec; /* 1 */
+
+ if (l_initrd) {
+ *p++ = "--initrd"; /* 2 */
+ *p++ = l_initrd; /* 3 */
+ }
+
+ if (args) {
+ *p++ = "--append"; /* 4 */
+ *p++ = args; /* 5 */
+ }
+
+ /* First try by telling kexec to run shutdown */
+
+ *(p + 0) = l_image;
+ *(p + 1) = NULL;
+
+ result = pb_run_cmd(argv);
+
+ /* kexec will return zero on success */
+ /* On error, force a kexec with the -f option */
+
+ if (result) {
+ *(p + 0) = "-f"; /* 6 */
+ *(p + 1) = l_image; /* 7 */
+ *(p + 2) = NULL; /* 8 */
+
+ result = pb_run_cmd(argv);
+ }
+
+ if (result)
+ pb_log("%s: failed: (%d)\n", __func__, result);
+
+ return result;
+}
+
+/**
+ * pb_run_kexec - Run kexec with the supplied boot options.
+ *
+ * For the convenience of the user, tries to load both files before
+ * returning error.
+ */
+
+int pb_run_kexec(const struct pb_kexec_data *kd)
+{
+ int result;
+ char *l_image;
+ char *l_initrd;
+
+ pb_log("%s: image: '%s'\n", __func__, kd->image);
+ pb_log("%s: initrd: '%s'\n", __func__, kd->initrd);
+ pb_log("%s: args: '%s'\n", __func__, kd->args);
+
+ if (kd->image)
+ l_image = pb_load_file(NULL, kd->image);
+ else {
+ l_image = NULL;
+ pb_log("%s: error null image\n", __func__);
+ }
+
+ l_initrd = kd->initrd ? pb_load_file(NULL, kd->initrd) : NULL;
+
+ if (!l_image || (kd->initrd && !l_initrd))
+ result = -1;
+ else
+ result = run_kexec_local(l_image, l_initrd, kd->args);
+
+ talloc_free(l_image);
+ talloc_free(l_initrd);
+
+ return result;
+}
+
+/**
+ * pb_elf_hash - Standard elf hash routine.
+ */
+
+unsigned int pb_elf_hash(const char *str)
+{
+ unsigned int h = 0, g;
+
+ while (*str) {
+ h = (h << 4) + *str++;
+ g = h & 0xf0000000;
+ if (g)
+ h ^= g >> 24;
+ h &= ~g;
+ }
+ pb_log("%s: %x\n", __func__, h);
+ return h;
+}
+
+/**
+ * pb_cat_hash - Hashes concatenation of two strings.
+ */
+
+unsigned int pb_cat_hash(const char *a, const char *b)
+{
+ unsigned int h;
+ char *s;
+
+ s = talloc_asprintf(NULL, "%s%s", a, b);
+ h = pb_elf_hash(s);
+ talloc_free(s);
+
+ return h;
+}
projects / petitboot / commitdiff