I'm not really sure if this question belongs here, but nopbody has ben able
to answer this question on the forums I posted it to, so I thought why not
ask the real experts:
I'm writing an OS kernel and I want to dump some functions and data from
memory when initialization is complete (like in Linux). So I gave all
functions I wanted to dump __attribute__ ((section (.text.init))). The
broblem is that GCC thinks .text.init is a DATA sections. So when I build
with -O3 it adds padding to aling the code, but it is padded with 0x00
instead of 0x90 (NOPs). This causes the kernel to crash when it encounters
the padding (0x00 0x00 0x?? 0x?? means ADD [????], ??, which always accesses
memory that isn't mapped, basically a SIGSEGV). How do I change it. I
couldn't find it in the documentation of GCC. I think doing something in LD
is to late (the 0x00 have already been written to the object file) So my
best guess is the assembler. Could some one help me?
Thanks in advance Rudy Koot (rudykoot at trinary dot tk)
_________________________________________________________________
Tired of spam? Get advanced junk mail protection with MSN 8.
http://join.msn.com/?page=features/junkmail
