Update of /cvsroot/wisp/wisp/users/dig
In directory sc8-pr-cvs1:/tmp/cvs-serv3355
Modified Files:
makehello.py
Log Message:
made make_executable able to generate symbolless ELF executables
Index: makehello.py
===================================================================
RCS file: /cvsroot/wisp/wisp/users/dig/makehello.py,v
retrieving revision 1.15
retrieving revision 1.16
diff -u -d -r1.15 -r1.16
--- makehello.py 24 Mar 2003 21:18:13 -0000 1.15
+++ makehello.py 1 Apr 2003 09:07:12 -0000 1.16
@@ -80,7 +80,9 @@
if 'x' in flags: p_flags |= PF.X
return p_flags
-def make_executable (text = None, data = None, memory_bottom = 0x08048000):
+def make_executable (text = None, data = None,
+ memory_bottom = 0x08048000,
+ want_symbols = 1):
# Will set given sections' origins.
sections = {}
@@ -94,17 +96,20 @@
binary.place_symbol('#elf/machine', EM.I386)
binary.place_symbol('#elf/flags', 0) # no flags for ia386
- shentnames = ['.text', '.data', '.symstr', '.symtab', '.shstrtab']
+ shentnames = ['.text', '.data']
+ if want_symbols: shentnames += ['.symstr', '.symtab']
+ shentnames.append('.shstrtab')
sections['.shstrtab'] = Linkie('<')
sections['.shstrtab'].emit_byte(0)
- sections['.symstr'] = Linkie('<')
- sections['.symstr'].emit_byte(0)
+ if want_symbols:
+ sections['.symstr'] = Linkie('<')
+ sections['.symstr'].emit_byte(0)
- sections['.symtab'] = Linkie('<')
- sections['.symtab'].align(4)
- sections['.symtab'].emit_string('\0' * 16)
+ sections['.symtab'] = Linkie('<')
+ sections['.symtab'].align(4)
+ sections['.symtab'].emit_string('\0' * 16)
phentnames = []
for name in shentnames:
@@ -158,19 +163,20 @@
# alignment has been processed already
binary.place_symbol('!' + name)
binary.paste(-1, section)
- for symbol, value in section.get_symbols():
- if symbol[0] != '&': continue # only process memory references
- symbol = symbol[1:] # but not their prefixen
- symstr = sections['.symstr']
- symstr.place_symbol('#.symstr/strings/' + symbol)
- sections['.symstr'].emit_string(symbol)
- sections['.symstr'].emit_byte(0)
- sections['.symtab'].emit_tetra_sum(['#.symstr/strings/' + symbol])
- sections['.symtab'].emit_tetra_sum(['&' + name])
- sections['.symtab'].emit_tetra(0)
- sections['.symtab'].emit_byte(STB.GLOBAL << 4 | STT.NOTYPE)
- sections['.symtab'].emit_byte(0)
- sections['.symtab'].emit_wyde(shentnames.index(name) + 1)
+ if want_symbols:
+ for symbol, value in section.get_symbols():
+ if symbol[0] != '&': continue # only process memory references
+ symbol = symbol[1:] # but not their prefixen
+ symstr = sections['.symstr']
+ symstr.place_symbol('#.symstr/strings/' + symbol)
+ sections['.symstr'].emit_string(symbol)
+ sections['.symstr'].emit_byte(0)
+ sections['.symtab'].emit_tetra_sum(['#.symstr/strings/' + symbol])
+ sections['.symtab'].emit_tetra_sum(['&' + name])
+ sections['.symtab'].emit_tetra(0)
+ sections['.symtab'].emit_byte(STB.GLOBAL << 4 | STT.NOTYPE)
+ sections['.symtab'].emit_byte(0)
+ sections['.symtab'].emit_wyde(shentnames.index(name) + 1)
memory_boundary += section.memsz()
memory_boundary = (memory_boundary + 0xFFF) & ~0xFFF
@@ -182,9 +188,18 @@
binary.link()
return binary
+print 'With symbols'
hello = make_executable(text = code, data = data)
hello.dump()
f = open('hello', 'w')
hello.get_file().tofile(f)
+f.close()
+
+print 'Without symbols'
+hellowosym = make_executable(text = code, data = data, want_symbols = 0)
+hellowosym.dump()
+
+f = open('hellowosym', 'w')
+hellowosym.get_file().tofile(f)
f.close()
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