diff options
| -rw-r--r-- | code/qcommon/vm.c | 41 |
1 files changed, 25 insertions, 16 deletions
diff --git a/code/qcommon/vm.c b/code/qcommon/vm.c index fc795cd..8ebe73d 100644 --- a/code/qcommon/vm.c +++ b/code/qcommon/vm.c @@ -373,33 +373,42 @@ vmHeader_t *VM_LoadQVM( vm_t *vm, qboolean alloc ) { return NULL; } - // byte swap the header - for ( i = 0 ; i < sizeof( *header ) / 4 ; i++ ) { - ((int *)header)[i] = LittleLong( ((int *)header)[i] ); - } - - if( header->vmMagic == VM_MAGIC_VER2 ) { + if( LittleLong( header->vmMagic ) == VM_MAGIC_VER2 ) { Com_Printf( "...which has vmMagic VM_MAGIC_VER2\n" ); + + // byte swap the header + for ( i = 0 ; i < sizeof( vmHeader_t ) / 4 ; i++ ) { + ((int *)header)[i] = LittleLong( ((int *)header)[i] ); + } + // validate - if ( header->vmMagic != VM_MAGIC_VER2 - || header->jtrgLength < 0 - || header->bssLength < 0 - || header->dataLength < 0 - || header->litLength < 0 + if ( header->jtrgLength < 0 + || header->bssLength < 0 + || header->dataLength < 0 + || header->litLength < 0 || header->codeLength <= 0 ) { VM_Free( vm ); Com_Error( ERR_FATAL, "%s has bad header", filename ); } - } else { + } else if( LittleLong( header->vmMagic ) == VM_MAGIC ) { + // byte swap the header + // sizeof( vmHeader_t ) - sizeof( int ) is the 1.32b vm header size + for ( i = 0 ; i < ( sizeof( vmHeader_t ) - sizeof( int ) ) / 4 ; i++ ) { + ((int *)header)[i] = LittleLong( ((int *)header)[i] ); + } + // validate - if ( header->vmMagic != VM_MAGIC - || header->bssLength < 0 - || header->dataLength < 0 - || header->litLength < 0 + if ( header->bssLength < 0 + || header->dataLength < 0 + || header->litLength < 0 || header->codeLength <= 0 ) { VM_Free( vm ); Com_Error( ERR_FATAL, "%s has bad header", filename ); } + } else { + VM_Free( vm ); + Com_Error( ERR_FATAL, "%s does not have a recognisable " + "magic number in its header", filename ); } // round up to next power of 2 so all data operations can |