Function cbmem_console_snapshot

payloads/libpayload/drivers/cbmem_console.c:100–140

}

char *cbmem_console_snapshot(void)
{
	const struct cbmem_console *const console_p = phys_to_virt(cbmem_console_p);
	char *console_c;
	uint32_t size, cursor, overflow, newc, oldc;

	if (!console_p) {
		printf("ERROR: No cbmem console found in coreboot table\n");
		return NULL;
	}

	cursor = console_p->cursor & CURSOR_MASK;
	overflow = console_p->cursor & OVERFLOW;
	if (!overflow && cursor < console_p->size)
		size = cursor;
	else
		size = console_p->size;

	console_c = malloc(size + 1);
	if (!console_c) {
		printf("ERROR: Not enough memory for console (size = %u)\n",
		       size);
		return NULL;
	}

	newc = 0;
	if (overflow) {
		if (cursor >= size) {
			printf("ERROR: CBMEM console struct is corrupted\n");
			free(console_c);
			return NULL;
		}
		for (oldc = cursor; oldc < size; oldc++)
			snapshot_putc(console_c, &newc, console_p->body[oldc]);
	}
	for (oldc = 0; oldc < size && oldc < cursor; oldc++)
		snapshot_putc(console_c, &newc, console_p->body[oldc]);
	console_c[newc] = '\0';

	return console_c;
}