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Date: Wed, 14 Apr 2010 06:47:00 -0000
From: Felipe Balbi <me@felipebalbi.com>
To: Felipe Balbi <me@felipebalbi.com>
Cc: gcc-help@gcc.gnu.org, iant@google.com
Subject: Re: Figuring out start and end of sections
Message-ID: <20100414064750.GD4285@gandalf>
Reply-To: me@felipebalbi.com
References: <20100414062234.GB4285@gandalf>  <20100414063043.GC4285@gandalf>
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Hi,

On Wed, Apr 14, 2010 at 09:30:43AM +0300, Felipe Balbi wrote:
> I commented the for loop just to get the thing compiling and nm doesn't
> show any __start_ symbols:

now I got it working:

#include <stdio.h>

typedef int (*initcall_t)(void);

extern initcall_t __start__initcall[];
extern initcall_t __stop__initcall[];

static int my_init(void)
{
	printf("hello world from _init\n");
}
static initcall_t __my_initcall_my_init
	__attribute__((__used__))
	__attribute__((section("_initcall"))) = my_init;

static void call_initcall(initcall_t fn)
{
	fn();
}

int main(int argc, char *argv[])
{
	initcall_t	*fn;

	for (fn = __start__initcall; fn
			< __stop__initcall; fn++)
		call_initcall(*fn);

	return
		0;
}

thanks a lot Ian and Andrew.

-- 
balbi