mirror of
https://github.com/elliotnunn/NetBoot.git
synced 2024-12-21 10:30:03 +00:00
Early attempt at streaming boot
Tends to crash when RAM AppleTalk is loaded
This commit is contained in:
Elliot Nunn
parent
f24a4e630a
commit
9e43fdeb94
301
ChainBoot.py
Executable file
301
ChainBoot.py
Executable file
@ -0,0 +1,301 @@
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#!/usr/bin/env python3
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# Multicast client
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# Adapted from: http://chaos.weblogs.us/archives/164
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import socket
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import os
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from os import path
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import struct
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import sys
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import time
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from snefru_hash import append_snefru
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my_unique_ltoudp_id = b'El' + (os.getpid() & 0xFFFF).to_bytes(2, 'big')
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image = open('ChainLoader.bin', 'rb').read()
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image2 = sys.argv[1:]
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image2dict = {}
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for img2name in image2:
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img2 = open(img2name, 'rb').read()
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img2name = path.basename(img2name)
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while len(img2) % 512: img2 += b'\0'
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image2dict[img2name] = bytearray(img2)
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img2name = img2name.encode('mac_roman')
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image += struct.pack('>LB', len(img2)//512, len(img2name)) + img2name
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while len(image) % 2: image += b'\0'
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image += bytes(5)
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image += b'Elliot'*10000 # padding, too much!
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image = append_snefru(image)
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open('/tmp/imgdebug', 'wb').write(image)
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# typedef short (*j_code)( short command, # SP+4 (sign-extend to long)
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# DGlobals *g, # SP+8
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# int **var1, # SP+12
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# int **var2); # SP+16
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# We return our OSErr in d0, and leave the 16 bytes of arguments on the stack for the caller to clean
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ANY = "0.0.0.0"
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MCAST_ADDR = "239.192.76.84"
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MCAST_PORT = 1954
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# Create a UDP socket
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP) # IPPROTO_UDP could just be 0
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# Allow multiple sockets to use the same PORT number
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sock.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
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sock.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEPORT,1)
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# Bind to the port that we know will receive multicast data
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sock.bind((ANY,MCAST_PORT))
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# Tell the kernel that we want to add ourselves to a multicast group
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# The address for the multicast group is the third param
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status = sock.setsockopt(socket.IPPROTO_IP,
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socket.IP_ADD_MEMBERSHIP,
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socket.inet_aton(MCAST_ADDR) + socket.inet_aton(ANY))
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# Wrap up in all sorts of crap...
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def mk_ddp(dest_node, dest_socket, src_node, src_socket, proto_type, data):
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# Wrap into DDP datagram
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data = struct.pack('>HBBB', len(data) + 5, dest_socket, src_socket, proto_type) + data
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# Wrap into LLAP packet
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data = struct.pack('>BBB', dest_node, src_node, 1) + data
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# Wrap the novel LToUDP header
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data = my_unique_ltoudp_id + data
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return data
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def pstring(x):
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try:
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x = x.encode('mac_roman')
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except AttributeError:
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pass
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return bytes([len(x)]) + x
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while 1:
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data, addr = sock.recvfrom(1024)
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# Okay... LToUDP parsing here. Let's start with the LLAP packet.
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# Man, chaining protocols is hard. This will inevitably require a rewrite.
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# Be careful to keep this as one cascading thing...
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if len(data) < 4: continue
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if data.startswith(my_unique_ltoudp_id): continue
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data = data[4:] # Trim down to LLAP packet (not "frame")
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if len(data) < 3: continue
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llap_dest_node = data[0]
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llap_src_node = data[1]
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llap_proto_type = data[2]
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data = data[3:] # Trim down to LLAP payload
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# Try to extract a DDP header, which is all we want!
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if llap_proto_type == 1:
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# ddp, short
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if len(data) < 5: continue
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ddp_len, ddp_dest_socket, ddp_src_socket, ddp_proto_type = struct.unpack_from('>HBBB', data)
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data = data[5:ddp_len]
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elif llap_proto_type == 2:
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# ddp, long (what should we do with this extra information?)
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if len(data) < 13: continue
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ddp_len, ddp_cksum, ddp_dest_net, ddp_src_net, ddp_dest_node, ddp_src_node, ddp_dest_socket, ddp_src_socket = struct.unpack_from('>4H5B', data)
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ddp_hop_count = (ddp_len >> 10) & 0xF
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ddp_len &= 0x3FF
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data = data[13:ddp_len]
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else:
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# llap control packet -- can probably ignore!
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continue
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print(f'datagram {llap_src_node}:{ddp_src_socket}->{llap_dest_node}:{ddp_dest_socket}', end=' ')
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if ddp_proto_type == 2:
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# Name Binding Protocol
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if len(data) < 2: continue
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nbp_func = data[0] >> 4
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nbp_tuple_cnt = data[0] & 0xF
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nbp_id = data[1]
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data = data[2:]
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nbp_tuples = []
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while data and len(nbp_tuples) < nbp_tuple_cnt:
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if len(data) < 5: break
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this_tuple = list(struct.unpack_from('>HBBB', data))
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data = data[5:]
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for i in range(3):
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# This should be coded more defensively, perhaps using exceptions
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this_tuple.append(data[1:1+data[0]].decode('mac_roman'))
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data = data[1+data[0]:]
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nbp_tuples.append(tuple(this_tuple))
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print('nbp func', nbp_func, 'id', nbp_id)
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for t in nbp_tuples:
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print(f' net:node:sock={t[0]}:{t[1]}:{t[2]} enum={t[3]} object:type@zone={t[4]}:{t[5]}@{t[6]}')
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if nbp_func == 2:
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# NBP LkUp
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if len(nbp_tuples) == 1 and nbp_tuples[0][5] == 'BootServer': # Looking for us
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sock.sendto(mk_ddp(
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dest_node=llap_src_node, dest_socket=ddp_src_socket,
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src_node=99, src_socket=99,
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proto_type=2,
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data=bytes([0x31, nbp_id]) + # 3=LkUp-Reply, 1=number-of-tuples
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struct.pack('>HBBB', # Pack the first tuple
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0, # (My) Network number
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99, # (My) Node ID
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99, # (My) Socket number
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0, # (My) Enumerator (i.e. which of many possible names for 99/99 is this?)
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) +
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pstring(nbp_tuples[0][4]) + pstring('BootServer') + pstring('*')
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),
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(MCAST_ADDR, MCAST_PORT))
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elif ddp_proto_type == 10:
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# Mysterious ATBOOT protocol
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if len(data) < 2: continue
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boot_type, boot_vers = struct.unpack_from('>BB', data)
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data = data[2:]
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# rbNullCommand EQU 0 ; ignore this one
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# rbMapUser EQU 1 ; user record request
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# rbUserReply EQU 2 ; user record reply
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# rbImageRequest EQU 3 ; image request & bitmap
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# rbImageData EQU 4 ; image data
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# rbImageDone EQU 5 ; server done with current image
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# rbUserRecordUpdate EQU 6 ; new user info to server
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# rbUserRecordAck EQU 7 ; info received from server
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if boot_type == 1:
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# It might be neater to trim off the "type" and "version" fields a bit earlier
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boot_machine_id, boot_timestamp, boot_username = struct.unpack_from('>HL 34p', data)
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print(f'atboot type={boot_type}, vers={boot_vers}, machineID={boot_machine_id}, userName={boot_username}')
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# // This defines a user record.
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# // Some of these fields can be determined on the fly by the boot server,
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# // while others are stored on disk by the boot server
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# typedef struct
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# {
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# char serverName[serverNameLength]; // server name to boot off of
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# char serverZone[zoneNameLength]; // and the zone it lives in
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# char serverVol[volNameLength]; // the volume name
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# short serverAuthMeth; // authentication method to use (none, clear txt, rand)
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# unsigned long sharedSysDirID; // dir id of shared system folder
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# unsigned long userDirID; // dir id of the user's private system folder
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# unsigned long finderInfo[8]; // blessed folder dir id, startup folder dir id etc...
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# unsigned char bootBlocks[138]; // see Inside Mac V-135
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# unsigned short bootFlag; // server based flags
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# unsigned char pad[306-18]; // <pd 5>pad to ddpMaxData
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# }userRecord;
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# // This defines the user record reply sent to workstations.
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# typedef struct
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# {
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# unsigned char Command; /* record or image request command word */
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# unsigned char pversion; /* version of boot protocol spoken by requestor */
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# unsigned short osID; /* type and version of os */
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# unsigned int userData; /* time stamp goes here */
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# unsigned short blockSize; /* size of blocks we will send */
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# unsigned short imageID; /* image ID */
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# short result; /* error codes */
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# unsigned int imageSize; /* size of image in blocks */
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# userRecord userRec; /* tell user where to go */
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# }BootPktRply;
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# Ignore the silly user record. Just make the fucker work!
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sock.sendto(mk_ddp(
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dest_node=llap_src_node, dest_socket=ddp_src_socket,
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src_node=99, src_socket=99,
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proto_type=10,
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data=struct.pack('>BBHLHHhL', 2, 1, boot_machine_id, boot_timestamp, 512, 0, 0, len(image) // 512).ljust(586, b'\0')
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),
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(MCAST_ADDR, MCAST_PORT))
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elif boot_type == 3:
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# It seems to want part of the boot image!
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# print('it wants data', data)
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# typedef struct
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# {
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# unsigned short imageID; /* */
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# unsigned char section; /* "section" of the image the bitmap refers to */
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# unsigned char flags; /* ??? */
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# unsigned short replyDelay;
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# unsigned char bitmap[512]; /* bitmap of the section of the image requested */
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# }bir; // Boot Image Req
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print('Boot Image Req')
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if len(data) < 6: continue
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boot_image_id, boot_section, boot_flags, boot_reply_delay = struct.unpack_from('>HBBH', data)
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data = data[6:]
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# Okay, pretty much just send the bits that were requested!
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print('Sending blocks')
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for blocknum in range(len(image) // 512):
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if len(data) > blocknum // 8 and (data[blocknum // 8] >> (blocknum % 8)) & 1:
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# typedef struct {
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# unsigned char packetType; /* The command number */
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# unsigned char packetVersion; /* Protocol version number */
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# unsigned short packetImage; /* The image this block belongs to */
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# unsigned short packetBlockNo; /* The block of the image (starts with 1) */
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# unsigned char packetData[512];/* the data portion of the packet */
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# } BootBlock,*BootBlockPtr;
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# print(f' {blocknum}', end='', flush=True)
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sock.sendto(mk_ddp(
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dest_node=llap_src_node, dest_socket=ddp_src_socket,
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src_node=99, src_socket=99,
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proto_type=10,
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data=struct.pack('>BBHH', 4, 1, boot_image_id, blocknum) + image[blocknum*512:blocknum*512+512]
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),
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(MCAST_ADDR, MCAST_PORT))
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# time.sleep(0.5)
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# break # wait for another request, you mofo!
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elif boot_type == 128:
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boot_seq, boot_blkoffset, boot_bytelen, boot_imgname = struct.unpack_from('>HLL32p', data)
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boot_imgname = boot_imgname.decode('mac_roman')
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for ofs in range(0, boot_bytelen, 512):
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thisblk = image2dict[boot_imgname][boot_blkoffset*512+ofs:boot_blkoffset*512+ofs+512]
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sock.sendto(mk_ddp(
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dest_node=llap_src_node, dest_socket=ddp_src_socket,
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src_node=99, src_socket=99,
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proto_type=10,
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data=struct.pack('>BBHL', 129, 1, boot_seq, ofs) + thisblk
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),
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(MCAST_ADDR, MCAST_PORT))
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else:
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print(f'ATBOOT type={boot_type} vers={boot_vers} contents={repr(data)}')
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else:
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print('unknown ddp payload', ddp_proto_type)
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991
ChainLoader.a
Normal file
991
ChainLoader.a
Normal file
@ -0,0 +1,991 @@
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myUnitNum equ 52
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myDRefNum equ ~myUnitNum
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Code
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cmp.l #1,4(SP)
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beq getBootBlocks
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cmp.l #2,4(SP)
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beq getSysVol
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cmp.l #3,4(SP)
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beq mountSysVol
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move.l #-1,d0
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rts
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getBootBlocks
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; Now is the time to install our DRVR because we are guaranteed an opportunity to boot if we don't fuck up.
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link A6,#-$32
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movem.l A2-A4/D3-D7,-(SP)
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; Copy the DRVR -> A2
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move.l #DrvrEnd-DrvrBase,D0
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lea DrvrBase,A0
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bsr InstallUnderBufPtr
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move.l A0,A2
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; Patch the server address into the DRVR code
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move.l 12(A6),A0 ; global pointer
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move.l 24(A0),D0 ; AddrBlock
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lea gSaveAddr-DrvrBase(A2),A0
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move.b #10,15(A0) ; hardcode DDP protocol ID
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move.b D0,13(A0) ; socket
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lsr.w #4,D0
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lsr.w #4,D0
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move.b D0,11(A0) ; node
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swap D0
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move.w D0,7(A0) ; network
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; Patch the disk image name and size into the DRVR code
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bsr BootPicker ; A0 = pstring ptr
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lea gNumBlks-DrvrBase(A2),A1
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move.l -4(A0),(A1) ; the size is underneath the pstring ptr
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move.l -4(A0),D6 ; D6 = block count, needed for DQE
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lea gQFilename-DrvrBase(A2),A1 ; A1 = dest
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moveq.l #1,D0
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add.b (A0),D0
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dc.w $A22E ; _BlockMoveData
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; Install the driver in the unit table
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||||||
|
move.l #myDRefNum,D0
|
||||||
|
dc.w $A43D ; _DrvrInstall ReserveMem
|
||||||
|
|
||||||
|
; That call created a DCE. Find and lock.
|
||||||
|
move.l $11C,A0 ; UTableBase
|
||||||
|
move.l myUnitNum*4(A0),A0
|
||||||
|
dc.w $A029 ; _HLock
|
||||||
|
move.l (A0),A0
|
||||||
|
|
||||||
|
; Populate the empty DCE that DrvrInstall left us
|
||||||
|
move.l A2,0(A0) ; dCtlDriver is pointer (not hdl)
|
||||||
|
|
||||||
|
move.w 0(A2),D0 ; get DRVR.drvrFlags
|
||||||
|
bclr #6,D0 ; Clear dRAMBased bit (to treat dCtlDriver as a pointer)
|
||||||
|
move.w D0,4(A0) ; set DCE.dCtlFlags
|
||||||
|
|
||||||
|
move.w 2(A2),$22(A0) ; drvrDelay to dCtlDelay
|
||||||
|
move.w 4(A2),$24(A0) ; drvrEMask to dCtlEMask
|
||||||
|
move.w 6(A2),$26(A0) ; drvrMenu to dCtlMenu
|
||||||
|
|
||||||
|
; Open the driver
|
||||||
|
lea -$32(SP),SP
|
||||||
|
move.l SP,A0
|
||||||
|
bsr clearblock
|
||||||
|
lea DrvrNameString,A1
|
||||||
|
move.l A1,$12(A0) ; IOFileName
|
||||||
|
dc.w $A000 ; _Open
|
||||||
|
lea $32(SP),SP
|
||||||
|
|
||||||
|
; Create a DQE
|
||||||
|
move.l #$16,D0
|
||||||
|
dc.w $A71E ; _NewPtr ,Sys,Clear
|
||||||
|
add.l #4,A0 ; has some cheeky flags at negative offset
|
||||||
|
move.l A0,A3
|
||||||
|
lea gDQEAddr,A0
|
||||||
|
move.l A3,(A0)
|
||||||
|
|
||||||
|
; Populate the DQE
|
||||||
|
move.l D6,D0 ; needs fixing for Ruby Slipper
|
||||||
|
lsl.l #5,D0 ; convert to bytes
|
||||||
|
lsl.l #4,D0
|
||||||
|
swap D0
|
||||||
|
move.l D0,$C(A3) ; dQDrvSz/dQDrvSz2
|
||||||
|
move.l #$80080000,-4(A3) ; secret flags, see http://mirror.informatimago.com/next/developer.apple.com/documentation/mac/Files/Files-112.html
|
||||||
|
move.w #1,4(A3) ; qType
|
||||||
|
move.w #0,$A(A3) ; dQFSID should be for a native fs
|
||||||
|
|
||||||
|
; Into the drive queue (which will further populate the DQE)
|
||||||
|
bsr findFreeDriveNum ; get drvnum in D0
|
||||||
|
lea gDriveNum,A0
|
||||||
|
move.w D0,(A0)
|
||||||
|
swap D0
|
||||||
|
move.w #myDRefNum,D0 ; D0.H = drvnum, D0.L = drefnum
|
||||||
|
move.l D0,D3 ; we need this in a sec
|
||||||
|
move.l A3,A0
|
||||||
|
dc.w $A04E ; _AddDrive
|
||||||
|
|
||||||
|
; Open our socket
|
||||||
|
lea -$32(SP),SP
|
||||||
|
move.l SP,A0
|
||||||
|
bsr clearblock
|
||||||
|
move.w #-10,$18(A0) ; ioRefNum = .MPP
|
||||||
|
move.w #248,$1A(A0) ; csCode = openSkt
|
||||||
|
move.b #10,$1C(A0) ; socket = 10, same as ATBOOT uses
|
||||||
|
lea DrvrSockListener-DrvrBase(A2),A2
|
||||||
|
move.l A2,$1E(A0) ; listener
|
||||||
|
dc.w $A004 ; _Control
|
||||||
|
lea $32(SP),SP
|
||||||
|
|
||||||
|
; Get the real 1024k of boot blocks to a temp location
|
||||||
|
; (it will eventually get trashed, but we have time)
|
||||||
|
lea 4096(A5),A4 ; above BootGlobals
|
||||||
|
|
||||||
|
lea -$32(SP),SP
|
||||||
|
move.l SP,A0
|
||||||
|
bsr clearblock
|
||||||
|
move.l D3,22(A0) ; IOVRefNum=drvnum, IORefNum=drefnum
|
||||||
|
move.l A4,32(A0) ; IOBuffer
|
||||||
|
move.l #1024,36(A0) ; IOReqCount = 2 blocks
|
||||||
|
move.l #0,46(A0) ; IOPosOffset = 0
|
||||||
|
move.w #1,44(A0) ; IOPosMode = from start
|
||||||
|
dc.w $A002 ; _Read
|
||||||
|
lea $32(SP),SP
|
||||||
|
|
||||||
|
; Put the boot blocks in netBOOT's global data structure as requested
|
||||||
|
move.l A4,A0
|
||||||
|
move.l 12(A6),A1
|
||||||
|
lea $BA(A1),A1
|
||||||
|
move.l #$138,D0
|
||||||
|
dc.w $A22E ; _BlockMoveData
|
||||||
|
|
||||||
|
move.l A1,A0 ; A0 = truncated BBs
|
||||||
|
move.l A4,A1 ; A1 = full-length BBs
|
||||||
|
bsr HealInjuredBootBlocks
|
||||||
|
|
||||||
|
; Sundry hacks to make the boot process kinda-work
|
||||||
|
bsr DisableDiskCache
|
||||||
|
bsr TrackMostRecentResource
|
||||||
|
bsr FakeLapMgr
|
||||||
|
bsr InstallMPPWrapper
|
||||||
|
; bsr fixDriveNumBug ; not sure if I even need to do this any more?
|
||||||
|
|
||||||
|
; Clean up our stack frame
|
||||||
|
movem.l (SP)+,A2-A4/D3-D7
|
||||||
|
unlk A6
|
||||||
|
|
||||||
|
move.l #0,D0
|
||||||
|
rts
|
||||||
|
|
||||||
|
getSysVol ; pointless call :(
|
||||||
|
move.l #0,D0
|
||||||
|
rts
|
||||||
|
|
||||||
|
mountSysVol
|
||||||
|
link A6,#-$32
|
||||||
|
movem.l A2-A4/D3,-(SP)
|
||||||
|
|
||||||
|
lea gDriveNum,A0
|
||||||
|
move.w (A0),D3
|
||||||
|
|
||||||
|
; System 7 needs MountVol to return the right vRefNum
|
||||||
|
move.l $366,A0 ; Steal existing PB from FSQHead
|
||||||
|
|
||||||
|
; Set aside the FS queue to stop MountVol deadlocking
|
||||||
|
move.w $360,-(SP) ; FSBusy
|
||||||
|
move.l $362,-(SP) ; FSQHead
|
||||||
|
move.l $366,-(SP) ; FSQTail
|
||||||
|
clr.w $360
|
||||||
|
clr.l $362
|
||||||
|
clr.l $366
|
||||||
|
|
||||||
|
; MountVol
|
||||||
|
bsr clearblock
|
||||||
|
move.w D3,$16(A0) ; ioVRefNum = ioDrvNum = the drive number
|
||||||
|
dc.w $A00F ; _MountVol
|
||||||
|
bne error
|
||||||
|
|
||||||
|
; Restore the FS queue
|
||||||
|
move.l (SP)+,$366
|
||||||
|
move.l (SP)+,$362
|
||||||
|
move.w (SP)+,$360
|
||||||
|
|
||||||
|
; Tattle about the DQE and VCB
|
||||||
|
move.l 4+12(A6),A1
|
||||||
|
move.l $356+2,A0 ; VCBQHdr.QHead (maybe I should be clever-er)
|
||||||
|
move.l A0,(A1)
|
||||||
|
|
||||||
|
move.l 4+16(A6),A1
|
||||||
|
lea gDQEAddr,A0
|
||||||
|
move.l (A0),(A1)
|
||||||
|
|
||||||
|
movem.l (SP)+,A2-A4/D3
|
||||||
|
unlk A6
|
||||||
|
|
||||||
|
move.l #0,d0
|
||||||
|
rts
|
||||||
|
|
||||||
|
error
|
||||||
|
move.w #$7777,D0
|
||||||
|
dc.w $A9C9
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
; The .netBOOT driver installs a ToExtFS hook that triggers on _MountVol
|
||||||
|
; and calls our mountSysVol. The hook routine checks that the drive number
|
||||||
|
; is 4. On machines with >2 existing drives, this check fails, and we
|
||||||
|
; never get called (i.e. Mini vMac).
|
||||||
|
|
||||||
|
; The solution is to head patch the .netBOOT ToExtFS hook. We use a
|
||||||
|
; one-shot patch on _MountVol to gain control after the hook is installed
|
||||||
|
; but before it is called, and install our new hook.
|
||||||
|
|
||||||
|
bystanderTrap equ $A00F ; _MountVol
|
||||||
|
gTheirDriveNum dc.w 0
|
||||||
|
gOrigBystanderTrap dc.l 0
|
||||||
|
gOrigExtFS dc.l 0
|
||||||
|
NetBootName dc.b 8, ".netBOOT", 0
|
||||||
|
|
||||||
|
fixDriveNumBug
|
||||||
|
; Get the .netBOOT driver refnum (only to search for the right drive)
|
||||||
|
lea -$32(A6),A0 ; Use our caller's stack frame
|
||||||
|
bsr clearblock
|
||||||
|
lea NetBootName,A1
|
||||||
|
move.l A1,$12(A0) ; IOFileName
|
||||||
|
dc.w $A000 ; _Open
|
||||||
|
bne error
|
||||||
|
move.w $18(A0),D0 ; Result in IORefNum
|
||||||
|
|
||||||
|
; Search for the drive with that number in dQRefNum
|
||||||
|
lea 2(A1),A0 ; Treat qHead like qLink.
|
||||||
|
nbFindLoop move.l (A0),A0 ; follow qLink
|
||||||
|
cmp.w 8(A0),D0 ; is the dQRefNum the .netBOOT driver?
|
||||||
|
beq.s nbFound ; then we found the .netBOOT drive
|
||||||
|
cmp.l 6(A1),A0 ; have we reached qTail?
|
||||||
|
beq error ; then we didn't find the .netBOOT drive
|
||||||
|
bra.s nbFindLoop
|
||||||
|
nbFound move.w 6(A0),D0 ; Get dqDrive (drive number)
|
||||||
|
|
||||||
|
; Save drivenum in a global for our patch to use
|
||||||
|
lea gTheirDriveNum,A0
|
||||||
|
move.w D0,(A0)
|
||||||
|
|
||||||
|
; Only install the patch if we need to
|
||||||
|
cmp.w #4,D0 ; A drivenum of 4 will work anyway
|
||||||
|
bne.s installOneshotPatch
|
||||||
|
rts
|
||||||
|
|
||||||
|
|
||||||
|
; Install a self-disabling patch on _MountVol
|
||||||
|
installOneshotPatch
|
||||||
|
move.w #bystanderTrap,D0 ; Save original in a global
|
||||||
|
dc.w $A346 ; _GetOSTrapAddress
|
||||||
|
lea gOrigBystanderTrap,A1
|
||||||
|
move.l A0,(A1)
|
||||||
|
|
||||||
|
move.w #bystanderTrap,D0 ; Install
|
||||||
|
lea oneshotPatch,A0
|
||||||
|
dc.w $A247 ; _SetOSTrapAddress
|
||||||
|
|
||||||
|
rts
|
||||||
|
|
||||||
|
|
||||||
|
; Our _MountVol patch
|
||||||
|
oneshotPatch
|
||||||
|
clr.l -(SP)
|
||||||
|
movem.l D0/D1/A0/A1,-(SP) ; Save "OS trap" registers
|
||||||
|
|
||||||
|
move.l $3F2,A0 ; Save the ToExtFS hook in a global to call later
|
||||||
|
lea gOrigExtFS,A1
|
||||||
|
move.l A0,(A1)
|
||||||
|
lea toExtFSPatch,A0 ; Install the ToExtFS head patch
|
||||||
|
move.l A0,$3F2
|
||||||
|
|
||||||
|
lea gOrigBystanderTrap,A0 ; Remove this patch from _MountVol
|
||||||
|
move.l (A0),A0
|
||||||
|
move.l A0,16(SP)
|
||||||
|
move.w #bystanderTrap,D0
|
||||||
|
dc.w $A047 ; _SetTrapAddress
|
||||||
|
|
||||||
|
movem.l (SP)+,D0/D1/A0/A1
|
||||||
|
rts
|
||||||
|
|
||||||
|
|
||||||
|
; Our head patch on the ToExtFS hook
|
||||||
|
toExtFSPatch
|
||||||
|
movem.l A0-A4/D1-D2,-(SP) ; Save the same registers at the real ToExtFS hook
|
||||||
|
|
||||||
|
cmp.b #$F,$6+1(A0) ; Check for a _MountVol call (IOTrap+1)
|
||||||
|
bne.s hookReturn
|
||||||
|
|
||||||
|
lea gTheirDriveNum,A1 ; Check for the CORRECT drive number,
|
||||||
|
move.w (A1),D0 ; instead of erroneously checking for 4.
|
||||||
|
cmp.w $16(A0),D0 ; IODrvNum
|
||||||
|
bne.s hookReturn
|
||||||
|
|
||||||
|
lea gOrigExtFS,A1 ; Rejoin the ToExtFS hook AFTER the buggy code
|
||||||
|
move.l (A1),A1
|
||||||
|
hookScan add.l #2,A1 ; Scan for "lea DrvQHdr,A2" (or similar)
|
||||||
|
cmp.w #$308,2(A1)
|
||||||
|
bne.s hookScan
|
||||||
|
jmp (A1) ; and enter at that point
|
||||||
|
|
||||||
|
hookReturn movem.l (SP)+,A0-A4/D1-D2
|
||||||
|
rts
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
clearblock
|
||||||
|
move.w #$32/2-1,D0
|
||||||
|
.loop clr.w (A0)+
|
||||||
|
dbra D0,.loop
|
||||||
|
lea -$32(A0),A0
|
||||||
|
rts
|
||||||
|
|
||||||
|
findFreeDriveNum ; and return it in D0. Free to trash the usual registers
|
||||||
|
; Find a free drive number (nicked this code from BootUtils.a:AddMyDrive)
|
||||||
|
LEA $308,A0 ; [DrvQHdr]
|
||||||
|
MOVEQ #4,D0 ; start with drive number 4
|
||||||
|
.CheckDrvNum
|
||||||
|
MOVE.L 2(A0),A1 ; [qHead] start with first drive
|
||||||
|
.CheckDrv
|
||||||
|
CMP.W 6(A1),D0 ; [dqDrive] does this drive already have our number?
|
||||||
|
BEQ.S .NextDrvNum ; yep, bump the number and try again.
|
||||||
|
CMP.L 6(A0),A1 ; [qTail] no, are we at the end of the queue?
|
||||||
|
BEQ.S .GotDrvNum ; if yes, our number's unique! Go use it.
|
||||||
|
MOVE.L 0(A1),A1 ; [qLink] point to next queue element
|
||||||
|
BRA.S .CheckDrv ; go check it.
|
||||||
|
|
||||||
|
.NextDrvNum
|
||||||
|
; this drive number is taken, pick another
|
||||||
|
ADDQ.W #1,D0 ; bump to next possible drive number
|
||||||
|
BRA.S .CheckDrvNum ; try the new number
|
||||||
|
.GotDrvNum
|
||||||
|
rts
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
DrvrNameString
|
||||||
|
dc.b 8, ".LANDisk", 0
|
||||||
|
|
||||||
|
|
||||||
|
gDriveNum dc.w 0
|
||||||
|
gDQEAddr dc.l 0
|
||||||
|
|
||||||
|
|
||||||
|
; code on this side is for start only, and stays in the netBOOT driver globals until released
|
||||||
|
|
||||||
|
BufPtrCopy
|
||||||
|
|
||||||
|
; code on this side gets copied beneath BufPtr (is that the best place??)
|
||||||
|
|
||||||
|
|
||||||
|
; Shall we start with a driver?
|
||||||
|
DrvrBase
|
||||||
|
dc.w $4F00 ; dReadEnable dWritEnable dCtlEnable dStatEnable dNeedLock
|
||||||
|
dc.w 0 ; delay
|
||||||
|
dc.w 0 ; evt mask
|
||||||
|
dc.w 0 ; menu
|
||||||
|
|
||||||
|
dc.w DrvrOpen-DrvrBase
|
||||||
|
dc.w DrvrPrime-DrvrBase
|
||||||
|
dc.w DrvrControl-DrvrBase
|
||||||
|
dc.w DrvrStatus-DrvrBase
|
||||||
|
dc.w DrvrClose-DrvrBase
|
||||||
|
dc.b 8, ".LANDisk", 0
|
||||||
|
|
||||||
|
g
|
||||||
|
gNumBlks dc.l 0 ; the source of all truth
|
||||||
|
gMyDCE dc.l 0
|
||||||
|
gTheirPB dc.l 0 ; pointer to the pending ParamBlk
|
||||||
|
gQuery
|
||||||
|
gQTypeVer dc.w 0 ; part of gQuery
|
||||||
|
gQSeqNum dc.w 0 ; part of gQuery
|
||||||
|
gQOffset dc.l 0 ; part of gQuery
|
||||||
|
gQLen dc.l 0 ; part of gQuery
|
||||||
|
gQFilename dcb.b 32 ; part of gQuery ; set by the init code
|
||||||
|
gQueryEnd
|
||||||
|
gWDS dcb.b 2+4+2+4+2
|
||||||
|
gMyPB dcb.b $32+2 ; allow us to clear it with move.l's
|
||||||
|
odd
|
||||||
|
gSaveAddr dcb.b 16
|
||||||
|
gAddr dcb.b 16
|
||||||
|
even
|
||||||
|
|
||||||
|
; a0=iopb, a1=dce on entry to all of these...
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
DrvrOpen
|
||||||
|
move.l A0,-(SP)
|
||||||
|
lea gMyDCE,A0 ; dodgy, need this for IODone
|
||||||
|
move.l A1,(A0)
|
||||||
|
move.l (SP)+,A0
|
||||||
|
|
||||||
|
move.w #0,$10(A0) ; ioResult
|
||||||
|
rts
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
DrvrPrime
|
||||||
|
cmp.b #2,$7(A0) ; ioTrap == aRdCmd
|
||||||
|
bne .notRead
|
||||||
|
|
||||||
|
move.w #1,$10(A0) ; ioResult = pending. We will return without an answer.
|
||||||
|
|
||||||
|
move.l A1,D0 ; save and restore A1
|
||||||
|
lea gTheirPB,A1 ; keep a copy of the pending PB in our code (a bit messy)
|
||||||
|
move.l A0,(A1)
|
||||||
|
move.l D0,A1
|
||||||
|
|
||||||
|
; For short requests, DevMgr puts offset in DCE
|
||||||
|
; We, oddly, stuff a BLOCK offset into ioPosOffset
|
||||||
|
btst.b #0,$2C(A0) ; test ioPosMode & kUseWidePositioning
|
||||||
|
bne.s .wide
|
||||||
|
.notwide move.l $10(A1),D0
|
||||||
|
bra.s .gotD0
|
||||||
|
.wide move.l $2E(A0),D0 ; the block offset can only be up to 32 bits
|
||||||
|
or.l $32(A0),D0
|
||||||
|
.gotD0 ror.l #4,D0 ; now D0 = (LS 23 bits) followed by (MS 9 bits)
|
||||||
|
ror.l #5,D0
|
||||||
|
move.l D0,$2E(A0) ; ioPosOffset = D0 = byte_offset/512
|
||||||
|
|
||||||
|
movem.l A0-A4,-(SP) ; sleazy function that will trash stuff
|
||||||
|
bsr.s DrvrTransmitRequest ; takes A0 as PB argument
|
||||||
|
movem.l (SP)+,A0-A4
|
||||||
|
|
||||||
|
bge.s .noerr
|
||||||
|
dc.w $A9FF ; Elliot, this is where we get those "unimp traps"
|
||||||
|
move.w #-36,$10(A0) ; ioResult = ioErr
|
||||||
|
.noerr
|
||||||
|
|
||||||
|
rts
|
||||||
|
|
||||||
|
.notRead
|
||||||
|
move.w #$DDDD,D0
|
||||||
|
dc.w $A9C9
|
||||||
|
|
||||||
|
move.w #-20,$10(A0)
|
||||||
|
rts
|
||||||
|
|
||||||
|
DrvrTransmitRequest ; On entry, A0=pb. Trashes A0-A4/D0 so be careful. Uses our globals extensively.
|
||||||
|
lea g,A2
|
||||||
|
|
||||||
|
move.b gSaveAddr-g(A2),gAddr-g(A2) ; reasonable way to copy the address struct, I guess
|
||||||
|
move.l gSaveAddr-g+1(A2),gAddr-g+1(A2)
|
||||||
|
move.l gSaveAddr-g+5(A2),gAddr-g+5(A2)
|
||||||
|
move.l gSaveAddr-g+9(A2),gAddr-g+9(A2)
|
||||||
|
move.w gSaveAddr-g+13(A2),gAddr-g+13(A2)
|
||||||
|
move.b gSaveAddr-g+15(A2),gAddr-g+15(A2)
|
||||||
|
|
||||||
|
move.w #$8001,gQTypeVer-g(A2) ; Means a polite request, v1
|
||||||
|
addq.w #1,gQSeqNum-g(A2) ; Increment the sequence counter
|
||||||
|
|
||||||
|
move.l $28(A0),D0 ; [ioActCount (in bytes)
|
||||||
|
lsr.l #4,D0
|
||||||
|
lsr.l #5,D0 ; / 512]
|
||||||
|
add.l $2E(A0),D0 ; + ioPosOffset (in blocks)
|
||||||
|
move.l D0,gQOffset-g(A2) ; -> "offset" field of request
|
||||||
|
|
||||||
|
move.l $24(A0),D0 ; ioReqCount (in bytes)
|
||||||
|
sub.l $28(A0),D0 ; - ioActCount (in bytes)
|
||||||
|
move.l D0,gQLen-g(A2) ; -> "length" field of request
|
||||||
|
|
||||||
|
lea gAddr,A3
|
||||||
|
clr.w gWDS-g(A2) ; WDS+0 reserved field
|
||||||
|
move.l A3,gWDS-g+2(A2) ; WDS+2 pointer to address struct
|
||||||
|
lea gQuery,A3
|
||||||
|
move.w #gQueryEnd-gQuery,gWDS-g+6(A2) ; WDS+6 length of second entry
|
||||||
|
move.l A3,gWDS-g+8(A2) ; WDS+8 pointer to second entry
|
||||||
|
clr.w gWDS-g+12(A2) ; WDS+10 zero to end the list
|
||||||
|
|
||||||
|
lea gMyPB,A0
|
||||||
|
.retry
|
||||||
|
bsr DrvrClearBlock
|
||||||
|
move.w #-10,$18(A0) ; ioRefNum = .MPP
|
||||||
|
move.w #246,$1A(A0) ; csCode = writeDDP
|
||||||
|
move.b #10,$1C(A0) ; socket = 10 (hardcoded)
|
||||||
|
move.b #1,$1D(A0) ; set checksumFlag
|
||||||
|
pea gWDS
|
||||||
|
move.l (SP)+,$1E(A0) ; wdsPointer to our WriteDataStructure
|
||||||
|
dc.w $A404 ; _Control ,async
|
||||||
|
|
||||||
|
cmp.w #-91,$10(A0) ; This happens when the RAM MPP replaces the ROM one
|
||||||
|
bne.s .noNeedToRetry ; so we need to reopen socket #10, then retry...
|
||||||
|
|
||||||
|
bsr DrvrClearBlock
|
||||||
|
move.w #-10,$18(A0) ; ioRefNum = .MPP
|
||||||
|
move.w #248,$1A(A0) ; csCode = openSkt
|
||||||
|
move.b #10,$1C(A0) ; socket = 10 (hardcoded)
|
||||||
|
pea DrvrSockListener
|
||||||
|
move.l (SP)+,$1E(A0) ; listener
|
||||||
|
dc.w $A004 ; _Control (synchronous, better hope it doesn't deadlock!)
|
||||||
|
|
||||||
|
bra.s .retry
|
||||||
|
|
||||||
|
.noNeedToRetry
|
||||||
|
move.w $10(A0),D0 ; for our caller to figure out what went wrong
|
||||||
|
|
||||||
|
rts
|
||||||
|
|
||||||
|
DrvrClearBlock
|
||||||
|
move.w #$32/2-1,D0
|
||||||
|
.loop clr.w (A0)+
|
||||||
|
dbra D0,.loop
|
||||||
|
lea -$32(A0),A0
|
||||||
|
rts
|
||||||
|
|
||||||
|
DrvrSockListener ; works closely with the Prime routine
|
||||||
|
; A0 Reserved for internal use by the .MPP driver. You must preserve this register until after the ReadRest routine has completed execution.
|
||||||
|
; A1 Reserved for internal use by the .MPP driver. You must preserve this register until after the ReadRest routine has completed execution.
|
||||||
|
; A2 Pointer to the .MPP driver's local variables. Elliot says: the frame and packet header ("RHA") are at offset 1 from A2 (keeps the 2-byte fields aligned)
|
||||||
|
; A3 Pointer to the first byte in the RHA past the DDP header bytes (the first byte after the DDP protocol type field).
|
||||||
|
; A4 Pointer to the ReadPacket routine. The ReadRest routine starts 2 bytes after the start of the ReadPacket routine.
|
||||||
|
; A5 Free for your use before and until your socket listener calls the ReadRest routine.
|
||||||
|
; D0 Lower byte is the destination socket number of the packet.
|
||||||
|
; D1 Word indicating the number of bytes in the DDP packet left to be read (that is, the number of bytes following the DDP header).
|
||||||
|
; D2 Free for your use.
|
||||||
|
; D3 Free for your use.
|
||||||
|
|
||||||
|
cmp.b #10,-1(A3) ; DDP protocol type better be ATBOOT
|
||||||
|
bne.s .trashpacket
|
||||||
|
|
||||||
|
moveq.l #8,D3
|
||||||
|
jsr (A4) ; Read 8 bytes
|
||||||
|
|
||||||
|
cmp.w #$8101,-8(A3) ; Check protocol and version
|
||||||
|
bne.s .trashpacket
|
||||||
|
|
||||||
|
lea gQSeqNum,A5 ; Check packet sequence number
|
||||||
|
move.w (A5),D2
|
||||||
|
cmp.w -6(A3),D2
|
||||||
|
bne.s .trashpacket
|
||||||
|
|
||||||
|
lea gTheirPB,A5
|
||||||
|
move.l (A5),A5
|
||||||
|
move.l $28(A5),D2 ; keep this in D2 because we will use it in a sec
|
||||||
|
cmp.l -4(A3),D2 ; ioActCount = this offset?
|
||||||
|
bne.s .outoforder
|
||||||
|
|
||||||
|
move.l $20(A5),A3 ; ioBuffer
|
||||||
|
add.l D2,A3 ; A3 = ioBuffer + ioReqDone
|
||||||
|
move.l #512,D3 ; D3 = bytes to read = 512
|
||||||
|
add.l D3,D2 ; D2 = new ioReqDone = old ioReqDone + 512
|
||||||
|
jsr 2(A4) ; ReadRest
|
||||||
|
; From this point on, use A1 instead of A5
|
||||||
|
|
||||||
|
lea gTheirPB,A1
|
||||||
|
move.l (A1),A1
|
||||||
|
move.l D2,$28(A1) ; update ioActCount
|
||||||
|
cmp.l $24(A1),D2 ; does it equal ioReqCount?
|
||||||
|
bne.s .rts
|
||||||
|
|
||||||
|
lea gMyDCE,A1
|
||||||
|
move.l (A1),A1
|
||||||
|
|
||||||
|
moveq.l #0,D0
|
||||||
|
move.l $8FC,A0 ; jIODone (D0 = result, A1 = DCE)
|
||||||
|
jmp (A0)
|
||||||
|
|
||||||
|
|
||||||
|
.outoforder ; apparent dropped packet, so please resend
|
||||||
|
moveq.l #0,D3
|
||||||
|
jsr 2(A4) ; ReadRest nothing
|
||||||
|
|
||||||
|
movem.l A0-A4,-(SP)
|
||||||
|
lea gTheirPB,A0
|
||||||
|
move.l (A0),A0
|
||||||
|
bsr DrvrTransmitRequest
|
||||||
|
movem.l (SP)+,A0-A4
|
||||||
|
|
||||||
|
rts
|
||||||
|
|
||||||
|
move.w #$1111,D0 ; won't happen with old-school LocalTalk
|
||||||
|
dc.w $A9C9
|
||||||
|
|
||||||
|
.trashpacket
|
||||||
|
move.w #$BBBB,D0 ; take this out when I'm confident the case doesn't matter
|
||||||
|
dc.w $A9C9
|
||||||
|
|
||||||
|
moveq.l #0,D3
|
||||||
|
jmp 2(A4) ; ReadRest nothing
|
||||||
|
|
||||||
|
.rts
|
||||||
|
rts
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
DrvrControl
|
||||||
|
move.w #-17,$10(A0) ; ioResult = controlErr
|
||||||
|
bra DrvrFinish
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
DrvrStatus
|
||||||
|
cmp.w #6,$1A(A0)
|
||||||
|
beq.s status_fmtLstCode
|
||||||
|
cmp.w #8,$1A(A0)
|
||||||
|
beq.s status_drvStsCode
|
||||||
|
bra.s status_unknown
|
||||||
|
|
||||||
|
status_fmtLstCode ; tell them about our size
|
||||||
|
movem.l A2/A3,-(SP)
|
||||||
|
|
||||||
|
lea gNumBlks,A3
|
||||||
|
move.l (A3),D0
|
||||||
|
lsl.l #5,D0 ; convert from blocks to bytes
|
||||||
|
lsl.l #4,D0
|
||||||
|
|
||||||
|
move.w #1,$1C(A0)
|
||||||
|
move.l $1C+2(A0),A2
|
||||||
|
move.l D0,0(A2)
|
||||||
|
move.l #$40000000,4(A2)
|
||||||
|
|
||||||
|
movem.l (SP)+,A2/A3
|
||||||
|
|
||||||
|
move.w #0,$10(A0) ; ioResult = noErr
|
||||||
|
bra DrvrFinish
|
||||||
|
|
||||||
|
status_drvStsCode ; tell them about some of our flags
|
||||||
|
move.w #0,$1C(A0) ; csParam[0..1] = track no (0)
|
||||||
|
move.l #$80080000,$1C+2(A0) ; csParam[2..5] = same flags as dqe
|
||||||
|
|
||||||
|
move.w #0,$10(A0) ; ioResult = noErr
|
||||||
|
bra DrvrFinish
|
||||||
|
|
||||||
|
status_unknown
|
||||||
|
move.w $1A(A0),D0 ; dodgy, for debugging
|
||||||
|
add.w #$3000,D0
|
||||||
|
dc.w $A9C9
|
||||||
|
|
||||||
|
move.w #-18,$10(A0) ; ioResult
|
||||||
|
bra DrvrFinish
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
DrvrClose
|
||||||
|
move.w #$4444,D0
|
||||||
|
dc.w $A9C9
|
||||||
|
|
||||||
|
move.w #0,$10(A0) ; ioResult
|
||||||
|
rts
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
DrvrFinish
|
||||||
|
move.w 6(A0),D1 ; iopb.ioTrap
|
||||||
|
btst #9,D1 ; noQueueBit
|
||||||
|
bne.s DrvrNoIoDone
|
||||||
|
move.l $8FC,-(SP) ; jIODone
|
||||||
|
DrvrNoIoDone
|
||||||
|
rts
|
||||||
|
DrvrEnd
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
HealInjuredBootBlocks ; patch the BBs to fix themselves if executed
|
||||||
|
|
||||||
|
; Args: A0 = truncated boot blocks (138b), A1 = correct boot blocks (1024b)
|
||||||
|
|
||||||
|
; If these boot blocks are executable (from offset 2), then the 138 bytes of
|
||||||
|
; declarative data copied by the netBOOT driver are not enough. We edit the boot
|
||||||
|
; blocks with a stub that copies the entire 1k into place. System 7 needs this.
|
||||||
|
|
||||||
|
; This unfortunately clobbers the declarative part of the boot blocks, so we need to
|
||||||
|
; check for declarative boot blocks and leave them unchanged
|
||||||
|
|
||||||
|
move.l A0,-(SP) ; Save A1 to a global, but need to keep A0
|
||||||
|
lea .gFullLoc,A0
|
||||||
|
move.l A1,(A0)
|
||||||
|
move.l (SP)+,A0
|
||||||
|
|
||||||
|
move.b 6(A0),D0 ; BBVersion
|
||||||
|
cmp.b #$44,D0
|
||||||
|
beq.s .executable
|
||||||
|
and.b #$C0,D0
|
||||||
|
cmp.b #$C0,D0
|
||||||
|
beq.s .executable
|
||||||
|
rts
|
||||||
|
|
||||||
|
; Relevant structure of the boot blocks:
|
||||||
|
; 0-1 bbID always 'LK'
|
||||||
|
; 2-5 bbEntry BRA.W base+128
|
||||||
|
; 6-7 bbVersion interpreted as above
|
||||||
|
; 8-137 data
|
||||||
|
; 138-1023 code (MISSING from netBOOT's short version)
|
||||||
|
|
||||||
|
; Our self-repairing boot blocks:
|
||||||
|
; 0-1 bbID always 'LK'
|
||||||
|
; 2-5 bbEntry BRA.W base+8
|
||||||
|
; 6-7 bbVersion interpreted as above
|
||||||
|
; 8-13 JSR .inPlaceFixRoutine
|
||||||
|
; 14-137 junk
|
||||||
|
|
||||||
|
|
||||||
|
.executable ; Need to leave bytes 6,7 intact
|
||||||
|
move.l #$60000004,2(A0) ; BB+2: BRA.W BB+8
|
||||||
|
move.w #$4EB9,8(A0) ; BB+8: JSR .inPlaceFixRoutine (abs)
|
||||||
|
lea .inPlaceFixRoutine,A1
|
||||||
|
move.l A1,10(A0)
|
||||||
|
|
||||||
|
move.l A0,A1 ; Clear the icache with a BlockMove
|
||||||
|
move.l #138,D0
|
||||||
|
dc.w $A02E ; _BlockMove
|
||||||
|
|
||||||
|
rts
|
||||||
|
|
||||||
|
.inPlaceFixRoutine ; The BB stub JSRs to here
|
||||||
|
move.l (SP)+,A1 ; so the return address will be at BB+14
|
||||||
|
lea -14(A1),A1 ; "Rewind" to the start of the BB
|
||||||
|
move.l .gFullLoc,A0 ; And here are our full boot blocks
|
||||||
|
move.l #1024,D0
|
||||||
|
dc.w $A02E ; _BlockMove (needs to clear cache)
|
||||||
|
|
||||||
|
jmp 2(A1) ; Jump to the fixed-up BB
|
||||||
|
|
||||||
|
.gFullLoc dc.l 0 ; Stuff addr of full-length BB in here
|
||||||
|
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
DisableDiskCache
|
||||||
|
move.w #$1A0,D0 ; _GetResource
|
||||||
|
dc.w $A746 ; _GetToolTrapAddress
|
||||||
|
lea .jmpOld+2,A1
|
||||||
|
move.l A0,(A1)
|
||||||
|
|
||||||
|
lea .GetResourcePatch,A0
|
||||||
|
move.l #.GetResourcePatchEnd-.GetResourcePatch,D0
|
||||||
|
bsr InstallInSysHeap
|
||||||
|
|
||||||
|
move.w #$1A0,D0
|
||||||
|
dc.w $A647 ; _SetToolTrapAddress
|
||||||
|
|
||||||
|
rts
|
||||||
|
|
||||||
|
.GetResourcePatch
|
||||||
|
cmp.l #'ptch',6(SP)
|
||||||
|
bne.s .jmpOld
|
||||||
|
cmp.w #41,4(SP)
|
||||||
|
bne.s .jmpOld
|
||||||
|
|
||||||
|
bra.s .memoryhole
|
||||||
|
.jmpOld
|
||||||
|
jmp $12345678
|
||||||
|
.memoryhole move.l (SP)+,A0
|
||||||
|
addq #6,SP
|
||||||
|
clr.l (SP)
|
||||||
|
jmp (A0)
|
||||||
|
.GetResourcePatchEnd
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
TrackMostRecentResource
|
||||||
|
move.w #$1A0,D0 ; _GetResource
|
||||||
|
dc.w $A746 ; _GetToolTrapAddress
|
||||||
|
lea GRjmp+2,A1
|
||||||
|
move.l A0,(A1)
|
||||||
|
|
||||||
|
lea GetResourcePatch,A0
|
||||||
|
move.l #GetResourcePatchEnd-GetResourcePatch,D0
|
||||||
|
bsr InstallInSysHeap ; takes and returns A0
|
||||||
|
|
||||||
|
move.w #$1A0,D0
|
||||||
|
dc.w $A647 ; _SetToolTrapAddress
|
||||||
|
|
||||||
|
rts
|
||||||
|
|
||||||
|
GetResourcePatch
|
||||||
|
move.l A0,D0
|
||||||
|
lea GRrecord,A0
|
||||||
|
move.l 6(SP),(A0)+
|
||||||
|
move.w 4(SP),(A0)+
|
||||||
|
move.l 4(A6),(A0)+
|
||||||
|
move.l D0,A0 ; maybe the register needed saving??
|
||||||
|
GRjmp jmp $12345678
|
||||||
|
|
||||||
|
dc.l 'Elmo'
|
||||||
|
GRrecord dcb.b 20
|
||||||
|
GetResourcePatchEnd
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
FakeLapMgr
|
||||||
|
tst.l $B18
|
||||||
|
bgt.s .nofix
|
||||||
|
|
||||||
|
moveq.l #MyLapMgrEnd-MyLapMgr,D0
|
||||||
|
dc.w $A440 ; _ResrvMemSys
|
||||||
|
moveq.l #MyLapMgrEnd-MyLapMgr,D0
|
||||||
|
dc.w $A522 ; _NewHandleSys
|
||||||
|
dc.w $A029 ; _HLock
|
||||||
|
move.l (A0),A1
|
||||||
|
lea MyLapMgr,A0
|
||||||
|
moveq.l #MyLapMgrEnd-MyLapMgr,D0
|
||||||
|
dc.w $A02E ; _BlockMove
|
||||||
|
move.l A1,$B18 ; -> LAPMgrPtr
|
||||||
|
|
||||||
|
.nofix rts
|
||||||
|
|
||||||
|
MyLapMgr
|
||||||
|
nop
|
||||||
|
nop
|
||||||
|
nop
|
||||||
|
nop
|
||||||
|
nop
|
||||||
|
nop
|
||||||
|
nop
|
||||||
|
nop
|
||||||
|
nop
|
||||||
|
nop
|
||||||
|
nop
|
||||||
|
rts
|
||||||
|
.exit
|
||||||
|
MyLapMgrEnd
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
InstallMPPWrapper
|
||||||
|
movem.l A2-A4,-(SP)
|
||||||
|
|
||||||
|
; Copy the fake .MPP DRVR, with its address in A2
|
||||||
|
move.l #MPPWrapperEnd-MPPWrapper,D0
|
||||||
|
lea MPPWrapper,A0
|
||||||
|
bsr InstallInSysHeap
|
||||||
|
move.l A0,A2
|
||||||
|
|
||||||
|
; Get DCE ptr in A0
|
||||||
|
move.l $11C,A0 ; UTableBase
|
||||||
|
move.l 9*4(A0),A0
|
||||||
|
move.l (A0),A0 ; got ptr to MPP DCE
|
||||||
|
|
||||||
|
; I have commented out the "driver is in a handle" lines
|
||||||
|
; Get driver code ptr in A1
|
||||||
|
move.l (A0),A1 ; should be a ptr, never a handle
|
||||||
|
; btst.b #6,4+1(A0)
|
||||||
|
; beq.s .isptr
|
||||||
|
; move.l (A1),A1
|
||||||
|
.isptr
|
||||||
|
|
||||||
|
; Copy some information over...
|
||||||
|
move.l (A1),(A2) ; all the flags
|
||||||
|
move.l 4(A1),4(A2)
|
||||||
|
|
||||||
|
moveq.l #5-1,D0 ; do it five times
|
||||||
|
lea 8(A1),A3 ; A3 = original relative word-size ptr
|
||||||
|
lea MPPOrigOpen-MPPWrapper(A2),A4 ; A4 = new absolute long-size ptr
|
||||||
|
.routineloop
|
||||||
|
clr.l D1
|
||||||
|
move.w (A3)+,D1
|
||||||
|
add.l A1,D1
|
||||||
|
move.l D1,(A4)+
|
||||||
|
dbra D0,.routineloop
|
||||||
|
|
||||||
|
; And "take over" the execution of the driver code
|
||||||
|
move.l A2,(A0) ; dCtlDriver = our new driver code
|
||||||
|
; bclr.b #6,4+1(A0) ; bit of a race condition, but who cares
|
||||||
|
|
||||||
|
movem.l (SP)+,A2-A4
|
||||||
|
|
||||||
|
rts
|
||||||
|
|
||||||
|
|
||||||
|
MPPWrapper
|
||||||
|
dc.w 0 ; flags, to be filled in
|
||||||
|
dc.w 0 ; delay
|
||||||
|
dc.w 0 ; evt mask
|
||||||
|
dc.w 0 ; menu
|
||||||
|
dc.w MPPOpen-MPPWrapper
|
||||||
|
dc.w MPPPrime-MPPWrapper
|
||||||
|
dc.w MPPControl-MPPWrapper
|
||||||
|
dc.w MPPStatus-MPPWrapper
|
||||||
|
dc.w MPPClose-MPPWrapper
|
||||||
|
dc.b 4,".MPP "
|
||||||
|
dc.w $3004 ; a version code
|
||||||
|
|
||||||
|
MPPOrigOpen dc.l 0
|
||||||
|
MPPOrigPrime dc.l 0
|
||||||
|
MPPOrigControl dc.l 0
|
||||||
|
MPPOrigStatus dc.l 0
|
||||||
|
MPPOrigClose dc.l 0
|
||||||
|
|
||||||
|
MPPOpen
|
||||||
|
move.l MPPOrigOpen,-(SP)
|
||||||
|
rts
|
||||||
|
|
||||||
|
MPPPrime
|
||||||
|
move.l MPPOrigPrime,-(SP)
|
||||||
|
rts
|
||||||
|
|
||||||
|
MPPControl
|
||||||
|
move.l MPPOrigControl,-(SP)
|
||||||
|
rts
|
||||||
|
|
||||||
|
MPPStatus
|
||||||
|
move.l MPPOrigStatus,-(SP)
|
||||||
|
rts
|
||||||
|
|
||||||
|
MPPClose
|
||||||
|
movem.l A0-A4/D0-D7,-(SP) ; ultra-cautious
|
||||||
|
|
||||||
|
; Preload some resources before networking goes away
|
||||||
|
|
||||||
|
clr.l -(SP)
|
||||||
|
move.l #'lmgr',-(SP)
|
||||||
|
move.w #0,-(SP)
|
||||||
|
dc.w $A9A0 ; _GetResource
|
||||||
|
addq.l #4,SP
|
||||||
|
|
||||||
|
clr.l -(SP)
|
||||||
|
move.l #'AINI',-(SP)
|
||||||
|
move.w #30000,-(SP)
|
||||||
|
dc.w $A9A0 ; _GetResource
|
||||||
|
addq.l #4,SP
|
||||||
|
|
||||||
|
clr.l -(SP)
|
||||||
|
move.l #'STR ',-(SP)
|
||||||
|
move.w #$BFE3,-(SP)
|
||||||
|
dc.w $A9A0 ; _GetResource
|
||||||
|
addq.l #4,SP
|
||||||
|
|
||||||
|
clr.l -(SP)
|
||||||
|
move.l #'STR#',-(SP)
|
||||||
|
move.w #$BF89,-(SP)
|
||||||
|
dc.w $A9A0 ; _GetResource
|
||||||
|
addq.l #4,SP
|
||||||
|
|
||||||
|
movem.l (SP)+,A0-A4/D0-D7
|
||||||
|
|
||||||
|
move.l MPPOrigClose,-(SP)
|
||||||
|
rts
|
||||||
|
|
||||||
|
ResourcesToPreload
|
||||||
|
|
||||||
|
MPPWrapperEnd
|
||||||
|
|
||||||
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
InstallInSysHeap
|
||||||
|
; takes A0/D0 as args, returns ptr in A0
|
||||||
|
movem.l A0/D0,-(SP)
|
||||||
|
dc.w $A51E ; NewPtr ,Sys
|
||||||
|
movem.l (SP)+,A1/D0 ; now A1=old, A0=new
|
||||||
|
exg A0,A1 ; now A1=new, A0=old
|
||||||
|
move.l D0,-(SP)
|
||||||
|
dc.w $A02E ; _BlockMove
|
||||||
|
move.l (SP)+,D0
|
||||||
|
exg A1,A0 ; now A1=old, A0=new
|
||||||
|
|
||||||
|
subq.l #1,D0
|
||||||
|
.wipeloop move.b $99,(A1)+
|
||||||
|
dbra D0,.wipeloop
|
||||||
|
|
||||||
|
rts
|
||||||
|
|
||||||
|
|
||||||
|
InstallUnderBufPtr
|
||||||
|
; takes A0/D0 as args, returns ptr in A0
|
||||||
|
sub.l D0,$10C ; BufPtr
|
||||||
|
move.l $10C,A1
|
||||||
|
move.l D0,-(SP)
|
||||||
|
dc.w $A02E ; _BlockMove
|
||||||
|
move.l (SP)+,D0
|
||||||
|
exg A0,A1 ; now A1=old, A0=new
|
||||||
|
|
||||||
|
subq.l #1,D0
|
||||||
|
.wipeloop move.b $99,(A1)+
|
||||||
|
dbra D0,.wipeloop
|
||||||
|
|
||||||
|
rts
|
||||||
|
|
||||||
|
|
||||||
|
BootPicker include "BootPicker.a"
|
||||||
@ -100,8 +100,15 @@ while 1:
|
|||||||
print(' ATBOOT image request', data.hex())
|
print(' ATBOOT image request', data.hex())
|
||||||
elif boot_type == 4:
|
elif boot_type == 4:
|
||||||
print(' ATBOOT image reply', data.hex())
|
print(' ATBOOT image reply', data.hex())
|
||||||
|
elif boot_type == 128:
|
||||||
|
a, b, c, d = struct.unpack_from('>HLL32p', data)
|
||||||
|
d = d.decode('mac_roman')
|
||||||
|
print(f' ATBOOT Elliot block seq={hex(a)} blkIdx={hex(b)} byteLen={hex(c)} img={repr(d)}')
|
||||||
|
elif boot_type == 129:
|
||||||
|
a, b = struct.unpack_from('>HL', data)
|
||||||
|
print(f' ATBOOT Elliot reply seq={hex(a)} relByteIdx={hex(b)}')
|
||||||
else:
|
else:
|
||||||
print(' ' + data.hex())
|
print(' ATBOOT', boot_type, boot_vers, data.hex())
|
||||||
|
|
||||||
else:
|
else:
|
||||||
print('Totally unknown DDP type', ddp_proto_type)
|
print('Totally unknown DDP type', ddp_proto_type)
|
||||||
|
|||||||
6
Makefile
6
Makefile
@ -74,6 +74,12 @@ BootPicker.bin: BootPicker.a
|
|||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
ChainLoader.bin: ChainLoader.a BootPicker.a
|
||||||
|
vasm-1/vasmm68k_mot -quiet -Fbin -pic -o $@ $<
|
||||||
|
|
||||||
|
testchain: ChainLoader.bin FORCE
|
||||||
|
zsh -c 'trap "kill %1" SIGINT SIGTERM EXIT; ./ChainBoot.py **/*.dsk /Users/elliotnunn/Downloads/SSW-71-Universal/Hd-100.iso & make testclient'
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
FORCE:
|
FORCE:
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user