Update of /cvsroot/wisp/wisp/users/dig
In directory sc8-pr-cvs1:/tmp/cvs-serv23760
Modified Files:
linkie.py
Added Files:
.cvsignore makehello.py
Log Message:
imported makehello.py
--- NEW FILE: .cvsignore ---
*.pyc
*.pyo
--- NEW FILE: makehello.py ---
#### makehello.py - test linkie.py by creating a greeter
#
# Copyleft © 2002 by Andres Soolo (di...@us...)
# This file is licensed under the GNU GPL v2. If you
# don't know what that means, please do read the GPL.
#
#### @(#) $Id: makehello.py,v 1.1 2003/02/05 22:43:57 digg Exp $
from linkie import Linkie
code = Linkie('<') # ia32
code.place_symbol('_start')
code.emit_byte(0xBA); code.emit_tetra(14) # mov edx, 14
code.emit_byte(0xB9); code.emit_tetra_sum(['message']) # mov ecx, message
code.emit_byte(0xBB); code.emit_tetra(1) # mov ebx, 1
code.emit_byte(0xB8); code.emit_tetra(4) # mov eax, 4
code.emit_byte(0xCD); code.emit_byte(0x80) # int 0x80
code.emit_byte(0xBB); code.emit_tetra(0) # mov ebx, 0
code.emit_byte(0xB8); code.emit_tetra(1) # mov eax, 1
code.emit_byte(0xCD); code.emit_byte(0x80) # int 0x80
data = Linkie('<') # ia32
data.place_symbol('message')
data.emit_string('Hello, world!\n')
code.dump()
print
data.dump()
print
(code + data).dump()
Index: linkie.py
===================================================================
RCS file: /cvsroot/wisp/wisp/users/dig/linkie.py,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -d -r1.1 -r1.2
--- linkie.py 5 Feb 2003 20:46:25 -0000 1.1
+++ linkie.py 5 Feb 2003 22:43:57 -0000 1.2
@@ -8,10 +8,11 @@
from struct import pack, unpack
from array import array
+from types import *
class Linkie:
def __init__ (this, byte_order):
- this._symbols = {} # symbol -> address
+ this._symbols = [] # symbol -> address
this._alignment = 1 # minimal required alignment constraint
this._binary = array('c')
this._skipped = 0 # uninitialized space after bits
@@ -69,6 +70,8 @@
datum, = unpack(tpl, this._binary[ofs : ofs + 4])
this._binary[ofs : ofs + 4] = array('c', pack(tpl, datum + value))
+ def notify_linker (this, offset, type, arg):
+ this._linker_notes.append((offset, type, arg))
def _emit_sum (this, size, addends, delta = 0):
if this._skipped <> 0: raise "Events out of order", this
for a in addends:
@@ -78,7 +81,7 @@
else: # forwards
this._unresolved_locals.append((a, size, len(this._binary)))
elif type(a) == StringType: # global reference
- this.notify_linker(size, a)
+ this.notify_linker(this.memsz(), size, a)
else: raise 'Invalid addend', a
return delta
def emit_byte_sum (this, addends, delta = 0):
@@ -175,6 +178,11 @@
place_symbol."""
if this._unresolved_locals: raise 'Incomplete linkie', this
return this._symbols[:]
+ def get_notes (this):
+ """get_notes() -> list of (offset, type, argument) tuples
+ Returns a list of the linker notes from the linkie."""
+ if this._unresolved_locals: raise 'Incomplete linkie', this
+ return this._linker_notes[:]
def copy (this):
if this._unresolved_locals: raise 'Incomplete linkie', this
@@ -183,3 +191,42 @@
that._binary = this._binary[:]
that._skipped = this._skipped
that._symbols = this._symbols[:]
+ that._linker_notes = this._linker_notes[:]
+ return that
+
+ def __add__ (this, that):
+ if this._unresolved_locals: raise 'Incomplete linkie', this
+ if that._unresolved_locals: raise 'Incomplete linkie', that
+ this = this.copy()
+ if that.filesz(): this.deskip()
+ this.align(that._alignment)
+ delta = this.memsz()
+ this._binary.extend(that._binary)
+ this._skipped = that._skipped
+ for sym, val in that._symbols:
+ this._symbols.append((sym, val + delta))
+ for ofs, typ, arg in that._linker_notes:
+ this._linker_notes.append((ofs + delta, typ, arg))
+ return this
+
+ def dump (this):
+ rsymbols = {}; rnotes = {}
+ othersymbols = []
+ for sym, val in this._symbols:
+ if 0 <= val < this.memsz():
+ if rsymbols.has_key(val): rsymbols[val].append(sym)
+ else: rsymbols[val] = [sym]
+ else: othersymbols.append((sym, val))
+ buf = []; bufstart = 0
+ for i in range(this.memsz()):
+ if len(buf) >= 16 or rsymbols.has_key(i):
+ if buf: print ' %08x:' % bufstart, ' '.join(buf)
+ buf = []; bufstart = i
+ if rsymbols.has_key(i):
+ rsymbols[i].sort()
+ for s in rsymbols[i]: print s + ':'
+ if i < len(this._binary):
+ buf.append('%02x' % ord(this._binary[i]))
+ else:
+ buf.append('oo')
+ if buf: print ' %08x:' % bufstart, ' '.join(buf)
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