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payload: Support setting boot-args as a payload.
Just use "boot-args=foo bar baz\n" as a payload Signed-off-by: Hector Martin <marcan@marcan.st>
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097c2f752a
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1 changed files with 31 additions and 0 deletions
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@ -135,6 +135,35 @@ static void *load_kernel(void *p, size_t size)
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}
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}
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#define MAX_VAR_NAME 32
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#define MAX_VAR_SIZE 1024
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#define IS_VAR(x) !strncmp((char *)*p, x, strlen(x))
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static bool check_var(u8 **p)
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{
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char *val = memchr(*p, '=', MAX_VAR_NAME + 1);
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if (!val)
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return false;
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val++;
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char *end = memchr(val, '\n', MAX_VAR_SIZE + 1);
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if (!end)
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return false;
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if (IS_VAR("boot-args=")) {
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*end = 0;
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kboot_set_bootargs(val);
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} else {
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return false;
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}
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printf("Found a variable at %p: %s\n", *p, (char *)*p);
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*p = (u8 *)(end + 1);
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return true;
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}
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static void *load_one_payload(void *start, size_t size)
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{
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u8 *p = start;
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@ -157,6 +186,8 @@ static void *load_one_payload(void *start, size_t size)
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} else if (!memcmp(p + 0x38, kernel_magic, sizeof kernel_magic)) {
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printf("Found a kernel at %p\n", p);
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return load_kernel(p, size);
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} else if (check_var(&p)) {
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return p;
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} else if (!memcmp(p, empty, sizeof empty)) {
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printf("No more payloads at %p\n", p);
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return NULL;
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