--- /dev/null
+--- a/arch/mips/kernel/machine_kexec.c
++++ b/arch/mips/kernel/machine_kexec.c
+@@ -23,67 +23,104 @@ void (*relocated_kexec_smp_wait) (void *
+ atomic_t kexec_ready_to_reboot = ATOMIC_INIT(0);
+ #endif
+
+-static void machine_kexec_init_args(void)
++#define KEXEC_MIPS_ARGV_BUF_SIZE COMMAND_LINE_SIZE
++#define KEXEC_MIPS_ARGV_MAX_ARGS (COMMAND_LINE_SIZE / 15)
++
++char kexec_argv_buf[KEXEC_MIPS_ARGV_BUF_SIZE] __kexec;
++int kexec_argv[KEXEC_MIPS_ARGV_MAX_ARGS] __kexec;
++
++static void
++machine_kexec_print_args(void)
+ {
+- kexec_args[0] = fw_arg0;
+- kexec_args[1] = fw_arg1;
+- kexec_args[2] = fw_arg2;
+- kexec_args[3] = fw_arg3;
++ int i;
+
+ pr_info("kexec_args[0] (argc): %lu\n", kexec_args[0]);
+ pr_info("kexec_args[1] (argv): %p\n", (void *)kexec_args[1]);
+ pr_info("kexec_args[2] (env ): %p\n", (void *)kexec_args[2]);
+ pr_info("kexec_args[3] (desc): %p\n", (void *)kexec_args[3]);
+-}
+
+-#define ARGV_MAX_ARGS (COMMAND_LINE_SIZE / 15)
++ for (i = 0; i < kexec_args[0]; i++)
++ pr_info("kexec_argv[%d] = %p, %s\n", i,
++ (char *)kexec_argv[i], (char *)kexec_argv[i]);
++}
+
+-int machine_kexec_pass_args(struct kimage *image)
++static void
++machine_kexec_init_argv(struct kimage *image)
+ {
+- int i, argc = 0;
+- char *bootloader = "kexec";
+- int *kexec_argv = (int *)kexec_args[1];
++ void __user *buf;
++ size_t bufsz;
++ size_t size;
++ int i;
+
++ bufsz = 0;
+ for (i = 0; i < image->nr_segments; i++) {
+- if (!strncmp(bootloader, (char *)image->segment[i].buf,
+- strlen(bootloader))) {
+- /*
+- * convert command line string to array
+- * of parameters (as bootloader does).
+- */
+- /*
+- * Note: we do treat the 1st string "kexec" as an
+- * argument ;-) so, argc here is 1.
+- */
+- char *str = (char *)image->segment[i].buf;
+- char *ptr = strchr(str, ' ');
+- char *kbuf = (char *)kexec_argv[0];
+- /* Whenever --command-line or --append used, "kexec" is copied */
+- argc = 1;
+- /* Parse the offset */
+- while (ptr && (ARGV_MAX_ARGS > argc)) {
+- *ptr = '\0';
+- if (ptr[1] != ' ' && ptr[1] != '\0') {
+- int offt = (int)(ptr - str + 1);
+- kexec_argv[argc] = (int)kbuf + offt;
+- argc++;
+- }
+- ptr = strchr(ptr + 1, ' ');
+- }
+- if (argc > 1) {
+- /* Copy to kernel space */
+- copy_from_user(kbuf, (char *)image->segment[i].buf, image->segment[i].bufsz);
+- fw_arg0 = kexec_args[0] = argc;
+- }
+- break;
++ struct kexec_segment *seg;
++
++ seg = &image->segment[i];
++ if (seg->bufsz < 6)
++ continue;
++
++ if (strncmp((char *) seg->buf, "kexec", 5))
++ continue;
++
++ /* don't copy "kexec" */
++ buf = seg->buf + 5;
++ bufsz = seg->bufsz - 5;
++ break;
++ }
++
++ if (i >= image->nr_segments)
++ return;
++
++ size = KEXEC_MIPS_ARGV_BUF_SIZE - 1;
++ size = min(size, bufsz);
++ if (size < bufsz)
++ pr_warn("kexec command line truncated to %d bytes\n", size);
++
++ /* Copy to kernel space */
++ copy_from_user(kexec_argv_buf, buf, size);
++}
++
++static void
++machine_kexec_parse_argv(struct kimage *image)
++{
++ char *reboot_code_buffer;
++ int reloc_delta;
++ char *ptr;
++ int argc;
++ int i;
++
++ ptr = kexec_argv_buf;
++ argc = 0;
++
++ /*
++ * convert command line string to array of parameters
++ * (as bootloader does).
++ */
++ while (ptr && *ptr && (KEXEC_MIPS_ARGV_MAX_ARGS > argc)) {
++ if (*ptr == ' ') {
++ *ptr++ = '\0';
++ continue;
+ }
++
++ kexec_argv[argc++] = (int) ptr;
++ ptr = strchr(ptr, ' ');
+ }
+
+- pr_info("argc = %lu\n", kexec_args[0]);
+- for (i = 0; i < kexec_args[0]; i++)
+- pr_info("argv[%d] = %p, %s\n", i, (char *)kexec_argv[i], (char *)kexec_argv[i]);
++ if (!argc)
++ return;
+
+- return 0;
++ kexec_args[0] = argc;
++ kexec_args[1] = (int) kexec_argv;
++ kexec_args[2] = 0;
++ kexec_args[3] = 0;
++
++ reboot_code_buffer = page_address(image->control_code_page);
++ reloc_delta = reboot_code_buffer - (char *) &__start___kexec_relocate;
++
++ kexec_args[1] += reloc_delta;
++ for (i = 0; i < argc; i++)
++ kexec_argv[i] += reloc_delta;
+ }
+
+ int
+@@ -95,8 +132,14 @@ machine_kexec_prepare(struct kimage *kim
+ *
+ * This can be overrided by _machine_kexec_prepare().
+ */
+- machine_kexec_init_args();
+- machine_kexec_pass_args(kimage);
++
++ kexec_args[0] = fw_arg0;
++ kexec_args[1] = fw_arg1;
++ kexec_args[2] = fw_arg2;
++ kexec_args[3] = fw_arg3;
++
++ machine_kexec_init_argv(kimage);
++ machine_kexec_parse_argv(kimage);
+
+ if (_machine_kexec_prepare)
+ return _machine_kexec_prepare(kimage);
+@@ -152,11 +195,13 @@ machine_kexec(struct kimage *image)
+ pr_info("kexec_indirection_page = %p\n",
+ (void *)kexec_indirection_page);
+
++ pr_info("Copy kexec_relocate section from %p to reboot_code_buffer: %p\n",
++ &__start___kexec_relocate, (void *)reboot_code_buffer);
++
+ memcpy((void *)reboot_code_buffer, &__start___kexec_relocate,
+ kexec_relocate_size);
+
+- pr_info("Copy kexec_relocate section from %p to reboot_code_buffer: %p\n",
+- &__start___kexec_relocate, (void *)reboot_code_buffer);
++ machine_kexec_print_args();
+
+ /*
+ * The generic kexec code builds a page list with physical
projects / openwrt.git / blobdiff