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tools: patch-image: Added optional size option

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Added optional command line option for patch-image tool
Default 16KB size is still maintained as this is an optional argument.
if one wants to specify or increase size they can provide this option.
sample usage: patch-dtb <file> <dtb> [dtb max size]

Signed-off-by: Vishnu Swaroop Duddu <duddu.swaroop@intel.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Vishnu Swaroop Duddu
2016-05-12 20:07:29 +05:30
committed by Hauke Mehrtens
parent 63cb2fb88d
commit ee613097be
2 changed files with 24 additions and 12 deletions
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14
tools/patch-image/src/patch-cmdline.c
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@@ -35,10 +35,16 @@ int main(int argc, char **argv)
{
int fd, found = 0, len, ret = -1;
char *ptr, *p;
unsigned int search_space;
if (argc != 3) {
fprintf(stderr, "Usage: %s <file> <cmdline>\n", argv[0]);
if (argc <= 2 || argc > 4) {
fprintf(stderr, "Usage: %s <file> <cmdline> [size]\n", argv[0]);
goto err1;
} else if (argc == 3) {
fprintf(stdout, "search space used is default of 16KB\n");
search_space = SEARCH_SPACE;
} else {
search_space = atoi(argv[3]);
}
len = strlen(argv[2]);
if (len + 9 > CMDLINE_MAX) {
@@ -47,12 +53,12 @@ int main(int argc, char **argv)
}
if (((fd = open(argv[1], O_RDWR)) < 0) ||
(ptr = (char *) mmap(0, SEARCH_SPACE + CMDLINE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1)) {
(ptr = (char *) mmap(0, search_space + CMDLINE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1)) {
fprintf(stderr, "Could not open kernel image");
goto err2;
}
for (p = ptr; p < (ptr + SEARCH_SPACE); p += 4) {
for (p = ptr; p < (ptr + search_space); p += 4) {
if (memcmp(p, "CMDLINE:", 8) == 0) {
found = 1;
p += 8;