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instead of our custom .go format, use elf

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* libguile/objcodes.c: Change to expect objcode on disk to be embedded
  in ELF instead of having the funky cookie.

  (to_native_order): Use already existing SCM_BYTE_ORDER style byte
  order instead of chars.
  (bytecode_to_objcode): No need for word_size arg.
  (scm_bytecode_to_objcode, scm_objcode_to_bytecode): Take optional
  endianness arg instead of sometimes using target-endianness.
  (scm_load_objcode, scm_write_objcode, scm_bytecode_to_native_objcode):
  Remove.

* libguile/objcodes.h: Adapt.

* libguile/vm.c (scm_load_compiled_with_vm): Use
  scm_load_thunk_from_file.
  (make_boot_program): Adapt to use scm_bytecode_to_objcode with
  endianness arg.

* module/Makefile.am (OBJCODE_LANG_SOURCES): Add (language objcode
  elf).
* module/language/objcode/elf.scm: New module, embeds objcode in ELF.

* module/language/bytecode/spec.scm (compile-objcode):
  (decompile-objcode): Use (target-endianness).

* module/language/objcode/spec.scm: use (language objcode elf) for
  write-objcode.

* module/scripts/disassemble.scm (disassemble):
* module/system/repl/command.scm (disassemble-file): Use
  load-thunk-from-file.

* module/system/vm/objcode.scm: Remove load-objcode and write-objcode.

* test-suite/tests/asm-to-bytecode.test (test-target): Adapt to the new
  ELF world.
This commit is contained in:
Andy Wingo 2012-06-22 13:35:55 +02:00
parent afc74c2920
commit b8bc86bce1
12 changed files with 192 additions and 325 deletions
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27
doc/ref/compiler.texi
View file

@ -1,6 +1,6 @@
@c -*-texinfo-*-
@c This is part of the GNU Guile Reference Manual.
@c Copyright (C) 2008, 2009, 2010, 2011
@c Copyright (C) 2008, 2009, 2010, 2011, 2012
@c Free Software Foundation, Inc.
@c See the file guile.texi for copying conditions.
@ -800,29 +800,36 @@ objcode)} module.
Returns @code{#f} iff @var{obj} is object code, @code{#f} otherwise.
@end deffn
@deffn {Scheme Procedure} bytecode->objcode bytecode
@deffn {Scheme Procedure} bytecode->objcode bytecode [endianness]
@deffnx {C Function} scm_bytecode_to_objcode (bytecode)
Makes a bytecode object from @var{bytecode}, which should be a
bytevector. @xref{Bytevectors}.
bytevector. @xref{Bytevectors}. By default, the embedded length fields
in the bytevector are interpreted in the native byte order.
@end deffn
@deffn {Scheme Variable} load-objcode file
@deffnx {C Function} scm_load_objcode (file)
@deffn {Scheme Variable} load-thunk-from-file file
@deffnx {C Function} scm_load_thunk_from_file (file)
Load object code from a file named @var{file}. The file will be mapped
into memory via @code{mmap}, so this is a very fast operation.
On disk, object code has an sixteen-byte cookie prepended to it, to
prevent accidental loading of arbitrary garbage.
On disk, object code is embedded in ELF, a flexible container format
created for use in UNIX systems. Guile has its own ELF linker and
loader, so it uses the ELF format on all systems.
@end deffn
@deffn {Scheme Variable} write-objcode objcode file
@deffnx {C Function} scm_write_objcode (objcode)
Write object code out to a file, prepending the sixteen-byte cookie.
Embed object code into an ELF container, and write it out to a file.
This procedure is part of a separate module, @code{(language objcode
elf)}.
@end deffn
@deffn {Scheme Variable} objcode->bytecode objcode
@deffn {Scheme Variable} objcode->bytecode objcode [endianness]
@deffnx {C Function} scm_objcode_to_bytecode (objcode)
Copy object code out to a bytevector for analysis by Scheme.
Copy object code out to a bytevector for analysis by Scheme. By
default, the length fields in the @code{struct scm_objcode} are
interpreted in the native byte order.
@end deffn
The following procedure is actually in @code{(system vm program)}, but