Add missing MULTIBOOT_INFO_MODS flag

Author: mosmeh

src/cpu.js

@@ -1302,6 +1302,7 @@ CPU.prototype.load_multiboot_option_rom = function(buffer, initrd, cmdline)
     const MULTIBOOT_SEARCH_BYTES = 8192;
     const MULTIBOOT_INFO_STRUCT_LEN = 116;
     const MULTIBOOT_INFO_CMDLINE = 0x4;
+    const MULTIBOOT_INFO_MODS = 0x8;
     const MULTIBOOT_INFO_MEM_MAP = 0x40;
 
     if(buffer.byteLength < MULTIBOOT_SEARCH_BYTES)
@@ -1397,8 +1398,6 @@ CPU.prototype.load_multiboot_option_rom = function(buffer, initrd, cmdline)
                 cpu.write32(multiboot_info_addr + 44, multiboot_mmap_count);
             }
 
-            cpu.write32(multiboot_info_addr, info);
-
             let entrypoint = 0;
             let top_of_load = 0;
 
@@ -1508,6 +1507,8 @@ CPU.prototype.load_multiboot_option_rom = function(buffer, initrd, cmdline)
 
             if(initrd)
             {
+                info |= MULTIBOOT_INFO_MODS;
+
                 cpu.write32(multiboot_info_addr + 20, 1); // mods_count
                 cpu.write32(multiboot_info_addr + 24, multiboot_data); // mods_addr;
 
@@ -1530,6 +1531,8 @@ CPU.prototype.load_multiboot_option_rom = function(buffer, initrd, cmdline)
                 cpu.write_blob(new Uint8Array(initrd), ramdisk_address);
             }
 
+            cpu.write32(multiboot_info_addr, info);
+
             // set state for multiboot
 
             cpu.reg32[REG_EBX] = multiboot_info_addr;