Implement the ECOFF `.aent' pseudo-op for ECOFF-style `.mdebug' section
support with ELF objects and, for consistency, also with ECOFF objects.
This is so that the same MIPS source can be assembled without and with
`.mdebug' section generation enabled.
Taking the `gas/testsuite/gas/mips/aent.s' test case source as an
example and the `mips-linux' target we have:
$ as -o aent.o aent.s
$ as -mdebug -o aent.o aent.s
aent.s: Assembler messages:
aent.s:10: Error: unknown pseudo-op: `.aent'
$
because for the !ECOFF_DEBUGGING case (which is the default) the
pseudo-op is already handled by the MIPS backend with `s_mips_ent',
however no handler is present for the opposite case.
For the MIPS target this is a functional regression introduced with
commit ecb4347ade ("Last take: approval for MIPS_STABS_ELF killing"),
<https://sourceware.org/ml/binutils/2002-06/msg00443.html>, where
support for the `.mdebug' section was added along with its associated
`-mdebug'/`-no-mdebug' command-line options, bringing an inconsistency
between the assembly syntax supported for each of these options as far
as the `.aent' pseudo-op is concerned.
Assembly language documentation available describes the pseudo-op
respectively as follows[1]:
"
.aent name, symno Sets an alternate entry point for the current
procedure. Use this information when you want
to generate information for the debugger. It must
appear inside an .ent/.end pair."
and[2]:
"
.aent name [,symno]
Sets an alternate entry point for the current procedure. Use this
information when you want to generate information for the debugger.
This directive must appear between a pair of .ent and .end directives.
(The optional symno is for compiler use only. It refers to a dense
number in a .T file (symbol table).)"
Copy the approach from `s_mips_ent' then and add `.aent' support to the
`.ent' pseudo-op handler shared between the ELF and ECOFF object file
format backends, by setting BSF_FUNCTION for the symbol requested.
References:
[1] "MIPSpro Assembly Language Programmer's Guide", Silicon Graphics,
Inc., Document Number 007-2418-004, Section 8.1 "Op-Codes", p. 96
<http://techpubs.sgi.com/library/manuals/2000/007-2418-004/pdf/007-2418-004.pdf>
[2] "Digital UNIX Assembly Language Programmer's Guide", Digital
Equipment Corporation, Order Number: AA-PS31D-TE, March 1996,
Chapter 5 "Assembler Directives", p. 5-2
<http://h41361.www4.hpe.com/docs/base_doc/DOCUMENTATION/V40G_PDF/APS31DTE.PDF>
gas/
* ecoff.c (ecoff_directive_ent, add_procedure): Handle `.aent'.
* config/obj-ecoff.c (obj_pseudo_table): Add "aent" entry.
* config/obj-elf.c (ecoff_debug_pseudo_table): Likewise.
* testsuite/gas/mips/aent-2.d: New test.
* testsuite/gas/mips/aent-mdebug.d: New test.
* testsuite/gas/mips/aent-mdebug-2.d: New test.
* testsuite/gas/mips/mips.exp: Run the new tests.
list traversal. Use bfd_section_list_prepend.
* config/tc-mmix.c (mmix_frob_file): Don't needlessly iterate
over the section list.
* config/tc-xtensa.c (xtensa_remove_section): Delete.
(xtensa_insert_section): Delete.
(xtensa_move_seg_list_to_beginning): Use bfd_section_list_remove
and bfd_section_list_prepend.
(xtensa_reorder_seg_list): Use bfd_section_list_remove and
bfd_section_list_insert_after.
* doc/as.texinfo (.symver): Updated for versioned symbol
reference.
* obj.h (format_ops): Add the frob_file_before_adjust field.
* config/obj-aout.c (aout_format_ops): Set the
frob_file_before_adjust field to 0.
* config/obj-coff.c (coff_format_ops): Likewise.
* config/obj-ecoff.c (ecoff_format_ops): Likewise.
* config/obj-elf.c (obj_elf_symver): Allow duplicated version
name.
(elf_frob_file_before_adjust): New function to remove unneeded
versioned symbols from the symbol table.
(elf_format_ops): Set the frob_file_before_adjust field to
elf_frob_file_before_adjust.
* config/obj-elf.h (obj_frob_file_before_adjust): Defined if
not defined.
* config/obj-multi.h (obj_frob_file_before_adjust): Defined.
assembler. ie. You will be able to do "as --em=i386aout" on an x86
linux-elf assembler to generate aout format object files, rather than
using a separate assembler. The aout emulation is enabled by giving
"--enable-targets=i386-linuxaout" to configure.
Oh yeah, there's a couple of fixes too. Error messages shouldn't be
passed to printf in the format arg just in case someone puts a `%' in
the message.
Alan Modra
Maciej W. Rozycki
Ambrogino Modigliani
Nick Clifton
H.J. Lu
Kazu Hirata
Hans-Peter Nilsson
Ian Lance Taylor
Richard Henderson