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Date: Wed, 14 Apr 2010 06:50:00 -0000
To: gcc-help@gcc.gnu.org
From: Fabian Cenedese <Cenedese@indel.ch>
Subject: Re: Figuring out start and end of sections
In-Reply-To: <20100414063043.GC4285@gandalf>
References: <20100414062234.GB4285@gandalf>  <20100414062234.GB4285@gandalf>
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>I commented the for loop just to get the thing compiling and nm doesn't
>show any __start_ symbols:
>
>$ nm tst | grep init
>080494cc d __init_array_end
>080494cc d __init_array_start
>08048400 T __libc_csu_init
>080495d4 d __my_initcall_my_init
>08048298 T _init
>080483c4 t my_init

Here's what we do for structures:

In the linker script:
        PROVIDE (__HWDEVICE_DESC_BEGIN = .);
        .struct_hw_dev_desc : {*(.struct_hw_dev_desc)} > ram
        PROVIDE (__HWDEVICE_DESC_END = .);

In the code:
#define STRUCT_HW_DEV_DESC __attribute__ ((section (".struct_hw_dev_desc")))

STRUCT_HW_DEV_DESC SINOSHwDeviceDesc { definition }

extern char* __HWDEVICE_DESC_BEGIN[];
extern char* __HWDEVICE_DESC_END[];

        SINOSHwDeviceDesc* desc = (SINOSHwDeviceDesc*) __HWDEVICE_DESC_BEGIN;
        desc++;

And then you can use these values for whatever you want
until you reach __HWDEVICE_DESC_END.

bye  Fabi