Re: SPARC assembly - a beginner's question...
Jeff Damens <[email protected]>
| Newsgroups | gmane.comp.security.sun |
|---|---|
| Message-ID | <[email protected]> |
> Running my assembly code does not.... > or %g0, %g0, [%fp-12] ! clear %fp-12 ... > expanding "clr [%fp-12]" to "or %g0, %g0, [%fp-12]" I think this is where the problem lies. I don't believe there is an addressing mode which lets you or two registers into a memory location. I think the 'clr' pseudo-op actually expands to st %g0, [%fp-12] (g0 is assumed to contain 0 always). > If I load the binary into gdb and take a look, a lot of it seems to be > missing: Ahhh... > set 0x2F736800, %o0 ! %o0=/sh\0 The \0 terminates the string literal being passed to __asm__ !!! This may explain why it didn't complain about the or %g0, %g0, [%fp-12]. I hope this helps... Regards, Jeff ---------------------------------------------------------------- Jeff Damens Unix Systems Administrator Polytechnic University [email protected] 6 Metrotech (718) 260-3492 Brooklyn, New York 11201