> EBX is a reserved as the base register when compiling with -fPIC. > Otherwise it get a "error: can't find a register in class 'BREG' while > reloading 'asm'".
In this case you have to dwarf annotate the push/pop > > > Also I if this calls syscall.S:__kernel_vsyscall it clobbers more registers > > (ecx at least?) and you need to describe that to gcc with a + > > Sine ECX is in use as the second parameter it is still marked as > clobbered. No input parameters are not clobbered. > I think it should word... As i know a system call will preserve all > register expect the EAX, which is marked as in and out for this asm() > directive. Yes the syscall does, but the vsyscall stub does not (for the !0x80 case) > This is due the -m32 compilation, i will get a log of > "warning: integer constant is too large for 'unsigned long' type", > because a unsigned long is only 32 bit. Don't explain it to me, put it into a comment. -Andi -- [email protected] -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
