Category : Pascal Source Code
Archive   : INTRFC61.ZIP
Filename : BLOCKS.PAS

unit blocks;

interface

type
entry_pt_ptr = ^entry_pt_rec;
entry_pt_rec = record
w1,w2 : word;
code_block, offset : word;
end;

block_ptr = ^block_rec;
block_rec = record
w1,size : word;
relocbytes,owner : word;
end;

const_block_ptr = ^const_block_rec;
const_block_rec = record
w1,size : word;
relocbytes,obj_ofs : word;
end;

vmt_block_ptr = ^vmt_block_rec;
vmt_block_rec = record
unitnum,rtype : byte;
entrynum,w3,vmt_ofs : word;
end;

unit_block_ptr = ^unit_block_rec;
unit_block_rec = record
w1 : word;
name : string;
end;

debug_block_ptr = ^debug_block_rec;
debug_block_rec = record
obj_ofs, w2, w3, startline, len : word;
bytes_per_line : array[1..1] of byte;
end;

procedure print_entries;
procedure print_code_blocks;
procedure print_const_blocks;
procedure print_var_blocks;
procedure print_mystery;
procedure print_unit_blocks;

function unit_name(ofs:word):string;
procedure write_code_block_name(debug_ofs : word);
procedure write_const_block_name(info_ofs : word);

procedure add_referenced_units;

implementation

uses dump,util,globals,head,loader,namelist,nametype,reloc;

procedure print_entries;
var
block:entry_pt_ptr;
ofs,limit : word;
begin
ofs := 0;
limit := header^.ofs_code_blocks-header^.ofs_entry_pts;
if ofs begin
writeln('Entry records');
writeln(' Proc Code block:offset');
end;
while ofs begin
block := add_offset(buffer,header^.ofs_entry_pts+ofs);
writeln(hexword2(ofs):8,
hexword2(block^.code_block):12,':',hexword(block^.offset));
inc(ofs,sizeof(block^));
end;
end;

procedure write_code_block_name(debug_ofs : word);
var
debug : debug_block_ptr;
obj : obj_ptr;
info : func_info_ptr;
parent_info : word;
parent_obj : obj_ptr;
begin
if debug_ofs = $FFFF then
exit;
debug := add_offset(buffer,header^.ofs_line_lengths+debug_ofs);
if debug^.obj_ofs = 0 then
write('Startup code')
else
begin
obj := add_offset(buffer,debug^.obj_ofs);
if obj^.obj_type = proc_id then
begin
info := add_offset(obj,4+length(obj^.name));
parent_info := info^.parent_ofs;
if parent_info <> 0 then
begin
parent_obj := find_type(unit_list[1],parent_info);
if parent_obj <> nil then
write(parent_obj^.name,'.')
else
write('obj',hexword(parent_info),'.');
end;
end;
write(obj^.name);
end;
end;

procedure write_const_block_name(info_ofs : word);
var
obj : obj_ptr;
begin
if info_ofs = 0 then
exit;
obj := find_type(unit_list[1],info_ofs);
if obj <> nil then
write(obj^.name)
else
write('obj',hexword(info_ofs));
end;

procedure print_blocks(blocktype:string; base,limit:word);
var
ofs : word;
block : block_ptr;
begin
writeln;
ofs := 0;
if ofs < limit then
begin
writeln(blocktype,' blocks');
writeln('Blocknum Bytes Relocrecs Owner');
end;
while ofs < limit do
begin
block := add_offset(buffer,base+ofs);
with block^ do
begin
write(hexword2(ofs):8,hexword2(size):8,hexword2(relocbytes):8,
hexword2(owner):8,' ');
if blocktype = 'Code' then
write_code_block_name(owner)
else if blocktype = 'Const' then
write_const_block_name(owner);
writeln;
if w1 <> 0 then
writeln(' w1 = ',hexword(w1));
end;
inc(ofs,sizeof(block_rec));
end;
end;

procedure print_code_blocks;
var
base,limit:word;
begin
base := header^.ofs_code_blocks;
limit := header^.ofs_const_blocks - base;
print_blocks('Code',base,limit);
end;

procedure print_const_blocks;
var
base,limit:word;
begin
base := header^.ofs_const_blocks;
limit := header^.ofs_var_blocks - base;
print_blocks('Const',base,limit);
end;

procedure print_var_blocks;
var
base,limit:word;
begin
base := header^.ofs_var_blocks;
limit := header^.ofs_unit_list - base;
print_blocks('Var',base,limit);
end;

procedure print_mystery;
begin
with header^ do
if ofs_unit_list > ofs_mystery then
begin
writeln;
writeln(^G'You have a mystery section! Please see the TPU60.DOC file.');
writeln('Here''s a dump:');
dumpbytes(buffer^,ofs_mystery,ofs_unit_list-ofs_mystery);
end;
end;

procedure print_unit_blocks;
var
base,ofs,limit:word;
block : unit_block_ptr;
begin
base := header^.ofs_unit_list;
ofs := 0;
limit := header^.ofs_src_name - ofs;
writeln('Unit list');
writeln(' Offset w1 Name');
while base+ofs < limit do
begin
block := add_offset(buffer,base+ofs);
with block^ do
begin
writeln(hexword2(ofs):8,hexword2(w1):8,' ',name);
ofs := ofs + 3 + length(name);
end;
end;
end;

function unit_name(ofs:word):string;
begin
unit_name := unit_block_ptr(
add_offset(buffer,header^.ofs_unit_list+ofs))^.name;
end;

procedure add_referenced_units;
var
block : unit_block_ptr;
ofs : word;
begin
ofs := header^.ofs_unit_list;
while ofs < header^.ofs_src_name do
begin
block := add_offset(buffer,ofs);
add_unit(block^.name);
ofs := ofs + 3 + length(block^.name);
end;
end;

end.