Always use arm-elf2aout; no a.out support both for binutils{,.old}

Switch to elf2aout for new binutils

branches: 1.35.16; 1.35.18;
Define ${LINKSCRIPT} in one place.

Use variables where appropriate.

Tweak previous.

Define the rule to generate the dynamic `ldscript', depending on
${SYSTEM_OBJS} properly. Don't forget cleaning the generated `ldscript'.
One less ${SYSTEM_LD_HEAD_EXTRA} use as a bonus.

No binary changes in ldscript/kernel files are observed.

branches: 1.31.2;
Explicitly set LOADADDRESS, the linker script hack is overriden by
command line arguments now.

Hi uebs!

Set dependency via KERNLDSCRIPT. Don't touch SYSTEM_DEP from outside.

Use LINKSCRIPT.

Missing dependency on ldscript files.

Use -fno-unwind-tables when creating a.out kernels.

branches: 1.26.2;
Don't force MACHINE_ARCH to be arm

branches: 1.25.2; 1.25.12;
Use common ${OBJCOPY_ELF2AOUT_FLAGS}.

Sync with src/sys/arch/shark/conf/Makefile.shark.inc rev 1.14:
> also need to strip out GCC 4.5's new .debug_pubtypes section.
> while here, minor cleanup.

XXX: probably we should have something like ${ARM_AOUT_REMOVE_SECTIONS}
XXX: in bsd.own.mk

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

branches: 1.22.2; 1.22.4;
Remove .ARM.attributes when converting from ELF to a.out.

Mirror the change from shark: something, somewhere is emitting new
ELF sections which we need to filter out when objcopying to the a.out
kernel. The new sections are .debug_frame, .debug_loc, .debug_pubnames,
and .debug_aranges.

branches: 1.20.6; 1.20.8; 1.20.10; 1.20.12;
Remove the debugging sections too when converting from an ELF
to an a.out file, after the addition of the "debugging always
included" file added recently.

branches: 1.19.6;
Remove the .note section when creating the a.out kernel image.

branches: 1.18.2; 1.18.16; 1.18.18; 1.18.20; 1.18.22; 1.18.26; 1.18.28;
Move mkldscript.sh, which is used to create ldscript dynamically to
merge link_set_* sections into the text section for a.out kernels,
from sys/arch/arm/conf/ to sys/conf/ since there is no ARM specific
stuff in it and other ports would share it.

branches: 1.17.24; 1.17.26; 1.17.30;
. Have dbsym explicitly suggest increasing SYMTAB_SPACE when
an overflow occurs.
. Make this error a fatal build time error
. Move the support for dbsym into the MI Makefile.kern.inc,
conditional upon the SYMTAB_SPACE option being defined in
the kernel config file.

branches: 1.16.12; 1.16.18;
work around a binutils bug where converting ELF kernels to a.out with objcopy
produces corrupted binaries when the link_set_* sections extend into another
page after the end of the .text section by using a generated an ldscript that
puts all the link_set_* data into the .text section in the first place.

branches: 1.15.2;
Add Experimental ELF support for cats. Only to be used if you feel daring
enough to run the ABLE firmware.

Need to remove .comment too.

branches: 1.13.2;
Don't define -D${MACHINE} in Makefile.arm. Instead, let platforms
that care define it themselves. Note that evbarm NO LONGER defines
-D${MACHINE}.

Take the newly added kern.ldscript for handling ELF->a.out from jason, and
apply to the cats kernel build. Seems to work happily for me.

Checkin new interrupt handling code for the footbridge.
This is based upon Jason's work on xscale.

Most of the interrupt handling code is now written in C using an asm stub to
call into the C code.

spl* now only updates a software mask, and does not update the hardware,
this should be much faster.

The new code works well on cats, it's untested on netwinder, but should work.

The code implements generic soft interrupts.

More work is still required to bring the isa interrupt handling code upto
scratch currently all isa interrupts are handled at IPL_BIO on the footbridge.
This may cause isa interrupts to be handled later than they should be.
I plan to fix this in the near future.

Echo dbsym command.

cats has full protos.

branches: 1.8.4;
The results of my cats NWDO hacking.

This was tested using a custom INSTALL kernel. The current one is >4Mb
which the cats firmware can't currently boot. We need to decide what
needs to be removed from INSTALL.

Remove trailing whitespace.

Update elf2aout to cope with infile and outfile being the same.
Make the cats a.out kernel be called netbsd. This means that make install installs the correct kernel

Adjust for new location of elf2aout.sh, and echo the command before
executing it (like we do for other commands).

LINKADDRESS != LOADADDRESS, so fix that typo.
Also move the elf2aout conversion to be last in the build sequence, this means that strip is run on the elf kernel.
Also have dbsym run on the kernel, this should allow us to have symbols in the kernel.
This now means kernels boot and run, and can also have ddb symbols.

Initial mechanism for building a working cats kernel with ELF compiler. Note that the shell script needs work, currently it assumes TOOLDIR is valid, if it's not it should probably just try using objdump and size. So some work still to do, but you can cross compile cats kernels now.

Set LOOSE_PROTOTYPES to no for cats. This means cats now uses stricter prototype checking.

branches: 1.1.2; 1.1.4;
Move interrupt-related stuff out of the generic 32-bit ARM genassym.cf
and into platform-specific genassym.cf files.