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/*--------------------------------------------------------------------*/
/*--- User-mode execve. pub_core_ume.h ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2013 Julian Seward
jseward@acm.org
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file COPYING.
*/
#ifndef __PUB_CORE_UME_H
#define __PUB_CORE_UME_H
#include "pub_core_basics.h" // VG_ macro
//--------------------------------------------------------------------
// PURPOSE: This module implements user-mode execve, ie. program loading
// and exec'ing.
//--------------------------------------------------------------------
/*------------------------------------------------------------*/
/*--- Loading files ---*/
/*------------------------------------------------------------*/
// Info needed to load and run a program. IN/INOUT/OUT refers to the
// inputs/outputs of do_exec().
typedef
struct {
const HChar** argv; // IN: the original argv
Addr exe_base; // INOUT: lowest (allowed) address of exe
Addr exe_end; // INOUT: highest (allowed) address
#if !defined(VGO_darwin)
Addr phdr; // OUT: address phdr was mapped at
Int phnum; // OUT: number of phdrs
UInt stack_prot; // OUT: stack permissions
PtrdiffT interp_offset; // OUT: relocation offset for ld.so
#else
Addr stack_start; // OUT: address of start of stack segment (hot)
Addr stack_end; // OUT: address of end of stack segment (cold)
Addr text; // OUT: address of executable's Mach header
Bool dynamic; // OUT: False iff executable is static
HChar* executable_path; // OUT: path passed to execve()
#endif
Addr entry; // OUT: entrypoint in main executable
Addr init_ip; // OUT: address of first instruction to execute
Addr brkbase; // OUT: base address of brk segment
Addr init_toc; // OUT: address of table-of-contents, on
// platforms for which that makes sense
// (ppc64-linux only)
// These are the extra args added by #! scripts
HChar* interp_name; // OUT: the interpreter name
HChar* interp_args; // OUT: the args for the interpreter
}
ExeInfo;
// Do a number of appropriate checks to see if the file looks executable by
// the kernel: ie. it's a file, it's readable and executable, and it's in
// either binary or "#!" format. On success, 'out_fd' gets the fd of the file
// if it's non-NULL. Otherwise the fd is closed.
extern SysRes VG_(pre_exec_check)(const HChar* exe_name, Int* out_fd,
Bool allow_setuid);
// Does everything short of actually running 'exe': finds the file,
// checks execute permissions, sets up interpreter if program is a script,
// reads headers, maps file into memory, and returns important info about
// the program.
extern Int VG_(do_exec)(const HChar* exe, ExeInfo* info);
#endif /* __PUB_CORE_UME_H */
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/
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