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