Date: Sun, 3 Oct 2004 21:33:04 +0200 From: Aurelien Nephtali <aurelien.nephtali@wanadoo.fr> To: current@freebsd.org Subject: Re: .symtab section is now broken ? Message-ID: <20041003193304.GA1202@nebula.wanadoo.fr> In-Reply-To: <20041003164006.GA20441@nebula.wanadoo.fr> References: <20041003164006.GA20441@nebula.wanadoo.fr>
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I fixed the problem by linking with -static but I'm sure that before I wasn't
using this.
On Sun, Oct 03, 2004 at 06:40:06PM +0200, Aurelien NEPHTALI wrote:
> Hi,
>
> I have coded some tools that read ELF binaries. Thet used to work 1 or 2 years
> ago but now they don't. These tools parse an ELF file to get addresses of
> malloc(),free(),etc into the PLT to put breakpoint on them.
>
> The problem comes from the .symtab section. I'm using this struct to read
> symbols:
>
> typedef struct s_symhdr
> {
> unsigned int st_name;
> unsigned int st_value;
> unsigned int st_size;
> unsigned char st_info;
> unsigned char st_other;
> unsigned short st_shndx;
> } t_symhdr;
>
> Before, the field 'st_value' contained the symbol's address into the PLT,
> now it's null, ie (readelf output):
>
> 71: 00000000 41 FUNC GLOBAL DEFAULT UND malloc
> ^^^^^^^^
> value
>
> I was suspecting the new gcc so I installed gcc 2.95 but it's the same problem.
>
> Is there a reason ? What to do to still get the value I want ?
>
> I have tested on NetBSD 1.6.1 and it works fine.
>
> Thanks.
>
> --
> NEPHTALI 'dak' Aurelien
> TEK2 - Promo 2008
> 06.19.84.90.10
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--
NEPHTALI 'dak' Aurelien
TEK2 - Promo 2008
06.19.84.90.10
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