We are always pretty near to the end of RAM, so now that we
have a reserved stack area, we can also check if it overlows.
When it happens, let's print a message forever, so a user who
comes and see what's up will see it eventually.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This renames ram.ld to ram.ld.S, adding a preprocessing rule. The
commit has no techcnical effect: it is only preparation for the next one.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

When we'll enable pp_printf, we'll need to resolve mprintf to
it. Local files are fixed by #define in wrc.h, but ptp-noposix has
explicit mprintf calls inside.  By using "PROVIDE" in the linker
script, we resolve mprintf to pp_printf only if no native mprintf
is part of the link stage. This has no effect if pp_printf is
not selected.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Remove all unneeded stuff from the linker script. Now the script only
includes what is actually used: it is easier to understand and change
(we'll add some local ELF sections), and it makes a better reference
for possible porting to a different architecture.

This commit also moves the default libraries from the linker script
itself to the LDFLAGS in Makefile, where they really belong.

CONFIG_DETERMINISTIC_BINARY confirms this makes no difference in
the generated binary (nor the ELF FWIW).

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Instead of picking libraries from the linker script, common practice
is listing them in LDFLAGS. This simplifies review and modification.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

If you find this patch with "git blame" please use "git blame -w"
to have all white-space ignored while associating lines to commits.

This commit has no practical effect but cleanup. I made it
with sed like this:

  git grep -l '[ \t]$' | xargs sed -i 's/[ \t]*$//'

However, I had to manually restore doc/wrpc_mon.png after the fact.
Similarly, I restored the include/hw/*regs.h files, as they
are (most likely) auto-generated.