Russel has suggested that I compile the kernel decompression code without
optimistation. For some reason changing the top level CFLAGS (was this the
wrong place to do it) has resulted in the makefile deciding to recompile
everything. Howver, it's spitting out warnings like
gcc -D__KERNEL__ -I/usr/src/linux/include -mapcs-32 -mshort-load-bytes
-mcpu=strongarm110 -Wall -Wstrict-prototypes -pipe -DEXPORT_SYMTAB -c console.c
{standard input}: Assembler messages:
{standard input}:11238: Warning: destination register same as write-back base
left, right and centre. Such lines look like this:
1: ldrbt r6,[r6],#0
1: ldrbt r4,[r4],#0
I don't recognise the t flag, and I can't remeber what happens with ldr
(ldm, IIRC, does the writeback after the first register load, but all that
might have changed/become undefined with StrongARM) but the instruction as
shown looks very odd - is it a very expensive No-op? Or is it doing something
cunning? Should the #0 be pre-increment instead?
(b.t.w. I get no warnings with -O2, which was what I was using)
Nick
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