what does this do ?
rameshpa at gmail.com
Mon Jan 14 10:20:46 EST 2013
On Sun, Jan 13, 2013 at 8:50 PM, horseriver <horserivers at gmail.com> wrote:
> On Sun, Jan 13, 2013 at 09:27:45PM -0800, Dave Hylands wrote:
> > Hi,
> > On Sun, Jan 13, 2013 at 11:29 AM, horseriver <horserivers at gmail.com>
> > >
> > > hi:
> > >
> > > In kernel code . some function is defined by
> > __attribute__((__section__(".initcall" level ".init")))
> > >
> > > what does this do ?
> > It puts the address of the function in a linker section named
> > .initcallX.init where X is replaced by the level.
> > These functions are called in order to initialize various subsystems and
> > drivers during kernel bootup.
> Another question:
> __attribute__((regparm(3))) ; what does this do ?
It causes the compiler to pass the argument (3 in this case) to be passed
in registers (like EAX, ECX and EDX) instead of stack.
> > --
> > Dave Hylands
> > Shuswap, BC, Canada
> > http://www.davehylands.com
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> Kernelnewbies at kernelnewbies.org
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