This is the mail archive of the libc-alpha@sourceware.org mailing list for the glibc project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: execve system call

From: "Carlos O'Donell" <carlos at systemhalted dot org>
To: "Neo Jia" <neojia at gmail dot com>
Cc: libc-alpha at sourceware dot org
Date: Mon, 26 Mar 2007 18:47:01 -0400
Subject: Re: execve system call
References: <5d649bdb0703260331l53419cd3h50e697cf7e9c659@mail.gmail.com>

On 3/26/07, Neo Jia <neojia@gmail.com> wrote:

hi,

I am trying to figure out the system call from user space to kernel
space. So, I read glibc wrapper first. But I cannot figure out the
exact meaning of INTERNAL_SYSCALL for execve system call on IA32 arch.
In this macro, which function will be called by the following assmebly
code ""call *%%gs:%P2\n\t"?

Is there anyone can help me clarify it?

Yes.

1. Build the library
2. Look at the disassembled output for execve using objdump -ldr.

I would also recommend that you familiarize yourself with the GNU
Assembler http://sourceware.org/binutils/docs-2.17/as/index.html

Cheers,
Carlos.

References:
- execve system call
  - From: Neo Jia

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]