1 2 /*--------------------------------------------------------------------*/ 3 /*--- User-mode execve. pub_core_ume.h ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2000-2012 Julian Seward 11 jseward (at) acm.org 12 13 This program is free software; you can redistribute it and/or 14 modify it under the terms of the GNU General Public License as 15 published by the Free Software Foundation; either version 2 of the 16 License, or (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, but 19 WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 26 02111-1307, USA. 27 28 The GNU General Public License is contained in the file COPYING. 29 */ 30 31 #ifndef __PUB_CORE_UME_H 32 #define __PUB_CORE_UME_H 33 34 //-------------------------------------------------------------------- 35 // PURPOSE: This module implements user-mode execve, ie. program loading 36 // and exec'ing. 37 //-------------------------------------------------------------------- 38 39 /*------------------------------------------------------------*/ 40 /*--- Loading files ---*/ 41 /*------------------------------------------------------------*/ 42 43 // Info needed to load and run a program. IN/INOUT/OUT refers to the 44 // inputs/outputs of do_exec(). 45 typedef 46 struct { 47 HChar** argv; // IN: the original argv 48 49 Addr exe_base; // INOUT: lowest (allowed) address of exe 50 Addr exe_end; // INOUT: highest (allowed) address 51 52 #if !defined(VGO_darwin) 53 Addr phdr; // OUT: address phdr was mapped at 54 Int phnum; // OUT: number of phdrs 55 Addr interp_base; // OUT: where interpreter (ld.so) was mapped 56 #else 57 Addr stack_start; // OUT: address of start of stack segment (hot) 58 Addr stack_end; // OUT: address of end of stack segment (cold) 59 Addr text; // OUT: address of executable's Mach header 60 Bool dynamic; // OUT: False iff executable is static 61 char* executable_path; // OUT: path passed to execve() 62 #endif 63 64 Addr entry; // OUT: entrypoint in main executable 65 Addr init_ip; // OUT: address of first instruction to execute 66 Addr brkbase; // OUT: base address of brk segment 67 Addr init_toc; // OUT: address of table-of-contents, on 68 // platforms for which that makes sense 69 // (ppc64-linux only) 70 71 // These are the extra args added by #! scripts 72 HChar* interp_name; // OUT: the interpreter name 73 HChar* interp_args; // OUT: the args for the interpreter 74 } 75 ExeInfo; 76 77 // Do a number of appropriate checks to see if the file looks executable by 78 // the kernel: ie. it's a file, it's readable and executable, and it's in 79 // either binary or "#!" format. On success, 'out_fd' gets the fd of the file 80 // if it's non-NULL. Otherwise the fd is closed. 81 extern SysRes VG_(pre_exec_check)(const HChar* exe_name, Int* out_fd, 82 Bool allow_setuid); 83 84 // Does everything short of actually running 'exe': finds the file, 85 // checks execute permissions, sets up interpreter if program is a script, 86 // reads headers, maps file into memory, and returns important info about 87 // the program. 88 extern Int VG_(do_exec)(const HChar* exe, ExeInfo* info); 89 90 #endif /* __PUB_CORE_UME_H */ 91 92 /*--------------------------------------------------------------------*/ 93 /*--- end ---*/ 94 /*--------------------------------------------------------------------*/ 95
