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Re: [Qemu-devel] Question about module load
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] Question about module load |
Date: |
Mon, 16 Dec 2013 16:50:25 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Mon, Dec 16, 2013 at 02:44:19PM +0900, Choonho Son wrote:
> I cannot understand QEMU iniitialization.
> Before starting main function(address@hidden), how modules are loaded?
>
> Since module are already loaded in module_call_init(MODULE_INIT_QOM);
Look at the source:
/* This should not be used directly. Use block_init etc. instead. */
#define module_init(function, type) \
static void __attribute__((constructor)) do_qemu_init_ ## function(void) { \
register_module_init(function, type); \
}
The __attribute__((constructor)) means the function gets invoked by the
runtime during startup (before main() is executed).
Check the gcc documentation for a detailed explanation:
http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
Stefan