80 lines
3.1 KiB
Text
80 lines
3.1 KiB
Text
|
The coff patches intend to do the following :
|
||
|
|
|
||
|
|
. Generate coff files very compatible with vanilla linker.
|
||
|
|
. Understands coff debug directives.
|
||
|
|
|
||
|
|
Here are the guidelines of the work I have done :
|
||
|
|
|
||
|
|
. Encapsulate format dependent code in macros where it is possible.
|
||
|
|
. Where not possible differenciate with #ifdef
|
||
|
|
. try not to change the calling conventions of the existing functions.
|
||
|
|
I made one exception : symbol_new. I would be pleased to hear about
|
||
|
|
a better solution. (symbols.c)
|
||
|
|
. Extend the use of N_TYPE_seg seg_N_TYPE tables so that segments can
|
||
|
|
be manipulated without using their format dependent name. (subsegs.c)
|
||
|
|
. Write a function to parse the .def debug directives
|
||
|
|
. Write two small peaces of code to handle the .ln directive.
|
||
|
|
. In write.c try to move all the cross compilation specifics (md_..) to
|
||
|
|
format dependent files.
|
||
|
|
. Encapsulate the data structures using generic types, macros calls.
|
||
|
|
. Added too much code to resolve the complexity of the symbol table
|
||
|
|
generated. Most of the code deals with debug stuff.
|
||
|
|
. Create another makefile, shorter, cleaner.
|
||
|
|
. Create a config.gas shell script to mimic the gcc,gdb... configuration
|
||
|
|
mechanism. This reduce the complexity of the makefile.
|
||
|
|
. Isolate the format dependent code in two files
|
||
|
|
coff.c coff.h
|
||
|
|
aout.c aout.h
|
||
|
|
elf.c elf.h [ Not yet ;-]
|
||
|
|
. added a little stack management routine for coff in file stack.c
|
||
|
|
. isolate os specific flags in m- files
|
||
|
|
|
||
|
|
If further development is planed on it is should solve the following problems :
|
||
|
|
|
||
|
|
. Encapsulate DESC & OTHER tests in a macro call. I'm not aware
|
||
|
|
of their exact semantics.
|
||
|
|
. Clean up the seg_N_TYPE N_TYPE_seg naming scheme
|
||
|
|
. Try to remove as much reference to segment dependent names as possible
|
||
|
|
. Find a cleaner solution for symbol_new.
|
||
|
|
. Report the modifications on vax, ns32k, sparc machine dependent files.
|
||
|
|
To acheive this goal, search for \<N_, sy_, symbol_new and symbolS.
|
||
|
|
. Allow an arbitrary number of segments (spare sections .ctor .dtor .bletch)
|
||
|
|
. Find a way to extend the debug information without breaking sdb
|
||
|
|
compatibility. Mainly intended for G++.
|
||
|
|
. should it do something to generate shared libraries objects ?
|
||
|
|
|
||
|
|
I have tested this code on the following processor/os. gcc-1.37.1 was
|
||
|
|
used for all the tests.
|
||
|
|
|
||
|
|
386 SCO unix ODT
|
||
|
|
gcc-1.37.1, gas, emacs-18.55
|
||
|
|
|
||
|
|
386 Esix rev C
|
||
|
|
gas-1.37/write.s
|
||
|
|
|
||
|
|
386 Ix 2.02
|
||
|
|
gas, all the X11R4 mit clients
|
||
|
|
|
||
|
|
386 CTIX 3.2
|
||
|
|
xsol (X11R4 solitary game), gas
|
||
|
|
|
||
|
|
68030 unisoft 1.3
|
||
|
|
the kernel (V.3.2) + tcp/ip extensions
|
||
|
|
bash-1.05, bison-1.11, compress-4.0, cproto, shar-3.49, diff-1.14,
|
||
|
|
dist-18.55, flex-2.3, gas-1.37, gcc-1.37.1, gdb-3.6, grep-1.5,
|
||
|
|
kermit, make-3.58, makedep, patch, printf, makeinfo, g++-1.37.1,
|
||
|
|
tar-1.08, texi2roff, uuencode, uutraf-1.2, libg++-1.37.2, groff-0.5
|
||
|
|
|
||
|
|
68020 sunos 3.5 (no, not coff, just to be sure that I didn't
|
||
|
|
introduce errors)
|
||
|
|
gcc-1.37.1, gas, emacs-18.55, gdb-3.6, bison-1.11, diff-1.14,
|
||
|
|
make-3.58, tar-1.08
|
||
|
|
|
||
|
|
68030 sunos 4.0.3 (idem)
|
||
|
|
gas
|
||
|
|
|
||
|
|
I would be glad to hear about new experiences
|
||
|
|
|
||
|
|
Loic (loic@adesign.uucp or loic@afp.uucp)
|
||
|
|
|