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Restore the ability to continue booting after legacy image overwrite

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Before new uImage code was merged, bootm code allowed for the kernel image to
get overwritten during decompresion. new uImage introduced a check for image
overwrites and refused to boot the image that got overwritten. This patch
restores the old behavior. It also adds a warning when the image overwriten is
a multi-image file, because in such case accessing componentes other than the
first one will fail.

Signed-off-by: Marian Balakowicz <m8@semihalf.com>
This commit is contained in:
Marian Balakowicz
2008-04-11 11:07:49 +02:00
committed by Wolfgang Denk
parent de2b3216e6
commit cb1c489690
12 changed files with 40 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
common/cmd_bootm.c
View File

@@ -286,9 +286,16 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
debug ("image_start = 0x%lX, image_end = 0x%lx\n", image_start, image_end);
debug ("load_start = 0x%lx, load_end = 0x%lx\n", load_start, load_end);
puts ("ERROR: image overwritten - must RESET the board to recover.\n");
show_boot_progress (-113);
do_reset (cmdtp, flag, argc, argv);
if (images.legacy_hdr_valid) {
if (image_get_type (&images.legacy_hdr_os_copy) == IH_TYPE_MULTI)
puts ("WARNING: legacy format multi component "
"image overwritten\n");
} else {
puts ("ERROR: new format image overwritten - "
"must RESET the board to recover\n");
show_boot_progress (-113);
do_reset (cmdtp, flag, argc, argv);
}
}
show_boot_progress (8);
@@ -533,9 +540,17 @@ static void *boot_get_kernel (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]
show_boot_progress (-5);
return NULL;
}
images->legacy_hdr_os = hdr;
images->legacy_hdr_valid = 1;
/*
* copy image header to allow for image overwrites during kernel
* decompression.
*/
memmove (&images->legacy_hdr_os_copy, hdr, sizeof(image_header_t));
/* save pointer to image header */
images->legacy_hdr_os = hdr;
images->legacy_hdr_valid = 1;
show_boot_progress (6);
break;
#if defined(CONFIG_FIT)
@@ -890,7 +905,7 @@ static void do_bootm_netbsd (cmd_tbl_t *cmdtp, int flag,
* address of the original image header.
*/
os_hdr = NULL;
if (image_check_type (hdr, IH_TYPE_MULTI)) {
if (image_check_type (&images->legacy_hdr_os_copy, IH_TYPE_MULTI)) {
image_multi_getimg (hdr, 1, &kernel_data, &kernel_len);
if (kernel_len)
os_hdr = hdr;
@@ -947,7 +962,7 @@ static void do_bootm_lynxkdi (cmd_tbl_t *cmdtp, int flag,
int argc, char *argv[],
bootm_headers_t *images)
{
image_header_t *hdr = images->legacy_hdr_os;
image_header_t *hdr = &images->legacy_hdr_os_copy;
#if defined(CONFIG_FIT)
if (!images->legacy_hdr_valid) {
@@ -964,7 +979,7 @@ static void do_bootm_rtems (cmd_tbl_t *cmdtp, int flag,
int argc, char *argv[],
bootm_headers_t *images)
{
image_header_t *hdr = images->legacy_hdr_os;
image_header_t *hdr = &images->legacy_hdr_os_copy;
void (*entry_point)(bd_t *);
#if defined(CONFIG_FIT)
@@ -994,10 +1009,10 @@ static void do_bootm_vxworks (cmd_tbl_t *cmdtp, int flag,
bootm_headers_t *images)
{
char str[80];
image_header_t *hdr = images->legacy_hdr_os;
image_header_t *hdr = &images->legacy_hdr_os_copy;
#if defined(CONFIG_FIT)
if (hdr == NULL) {
if (!images->legacy_hdr_valid) {
fit_unsupported_reset ("VxWorks");
do_reset (cmdtp, flag, argc, argv);
}
@@ -1014,7 +1029,7 @@ static void do_bootm_qnxelf(cmd_tbl_t *cmdtp, int flag,
{
char *local_args[2];
char str[16];
image_header_t *hdr = images->legacy_hdr_os;
image_header_t *hdr = &images->legacy_hdr_os_copy;
#if defined(CONFIG_FIT)
if (!images->legacy_hdr_valid) {
@@ -1041,7 +1056,7 @@ static void do_bootm_artos (cmd_tbl_t *cmdtp, int flag,
int i, j, nxt, len, envno, envsz;
bd_t *kbd;
void (*entry)(bd_t *bd, char *cmdline, char **fwenv, ulong top);
image_header_t *hdr = images->legacy_hdr_os;
image_header_t *hdr = &images->legacy_hdr_os_copy;
#if defined(CONFIG_FIT)
if (!images->legacy_hdr_valid) {

2
common/image.c
View File

@@ -983,7 +983,7 @@ int boot_get_ramdisk (int argc, char *argv[], bootm_headers_t *images,
#endif /* CONFIG_B2 || CONFIG_EVB4510 || CONFIG_ARMADILLO */
} else if (images->legacy_hdr_valid &&
image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
image_check_type (&images->legacy_hdr_os_copy, IH_TYPE_MULTI)) {
/*
* Now check if we have a legacy mult-component image,
* get second entry data start address and len.