mirror of
https://github.com/Zenithsiz/ftmemsim-valgrind.git
synced 2026-02-10 13:40:25 +00:00
db29debc13
suggested in #119404. Prior to this commit, if the current traced process attempted to execve a setuid executable, an error was always returned. The revised behaviour is: If the current (traced) process attempts to execve a setuid executable: * If --trace-children=yes is not in effect, the execve is allowed. * If --trace-children=yes is in effect, the execve is disallowed (as at present), but an error message is printed (unless in XML mode), so at least the execve does not fail silently any more. As per discussion on #119404 we could probably do a lot better, but these changes are at least simple, useful and uncontroversial. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7175
101 lines
3.9 KiB
C
101 lines
3.9 KiB
C
|
|
/*--------------------------------------------------------------------*/
|
|
/*--- User-mode execve. pub_core_ume.h ---*/
|
|
/*--------------------------------------------------------------------*/
|
|
|
|
/*
|
|
This file is part of Valgrind, a dynamic binary instrumentation
|
|
framework.
|
|
|
|
Copyright (C) 2000-2007 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
|
|
|
|
//--------------------------------------------------------------------
|
|
// PURPOSE: This module implements user-mode execve, ie. program loading
|
|
// and exec'ing.
|
|
//--------------------------------------------------------------------
|
|
|
|
/*------------------------------------------------------------*/
|
|
/*--- Loading ELF files ---*/
|
|
/*------------------------------------------------------------*/
|
|
|
|
// Info needed to load and run a program. IN/INOUT/OUT refers to the
|
|
// inputs/outputs of do_exec().
|
|
typedef
|
|
struct {
|
|
HChar** argv; // IN: the original argv
|
|
|
|
Addr exe_base; // INOUT: lowest (allowed) address of exe
|
|
Addr exe_end; // INOUT: highest (allowed) address
|
|
|
|
Addr phdr; // OUT: address phdr was mapped at
|
|
Int phnum; // OUT: number of phdrs
|
|
Addr interp_base; // OUT: where interpreter (ld.so) was mapped
|
|
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 ELF 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);
|
|
|
|
/*------------------------------------------------------------*/
|
|
/*--- Finding and dealing with auxv ---*/
|
|
/*------------------------------------------------------------*/
|
|
|
|
struct ume_auxv
|
|
{
|
|
Word a_type;
|
|
union {
|
|
void *a_ptr;
|
|
Word a_val;
|
|
} u;
|
|
};
|
|
|
|
extern struct ume_auxv *VG_(find_auxv)(UWord* orig_esp);
|
|
|
|
#endif /* __PUB_CORE_UME_H */
|
|
|
|
/*--------------------------------------------------------------------*/
|
|
/*--- end ---*/
|
|
/*--------------------------------------------------------------------*/
|