coregrind/pub_core_initimg.h

   1
   2 /*--------------------------------------------------------------------*/
   3 /*--- Create initial process image on for the client               ---*/
   4 /*---                                           pub_core_initimg.h ---*/
   5 /*--------------------------------------------------------------------*/
   6
   7 /*
   8    This file is part of Valgrind, a dynamic binary instrumentation
   9    framework.
  10
  11    Copyright (C) 2006-2017 OpenWorks LLP
  12       info@open-works.co.uk
  13
  14    This program is free software; you can redistribute it and/or
  15    modify it under the terms of the GNU General Public License as
  16    published by the Free Software Foundation; either version 2 of the
  17    License, or (at your option) any later version.
  18
  19    This program is distributed in the hope that it will be useful, but
  20    WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  22    General Public License for more details.
  23
  24    You should have received a copy of the GNU General Public License
  25    along with this program; if not, see <http://www.gnu.org/licenses/>.
  26
  27    The GNU General Public License is contained in the file COPYING.
  28 */
  29
  30 #ifndef __PUB_CORE_INITIMG_H
  31 #define __PUB_CORE_INITIMG_H
  32
  33 #include "pub_core_basics.h"      // Addr
  34 #include "libvex.h"
  35
  36 //--------------------------------------------------------------------
  37 // PURPOSE: Map the client executable into memory, then set up its
  38 // stack, environment and data section, ready for execution.  Quite a
  39 // lot of work on Linux (ELF).
  40 //--------------------------------------------------------------------
  41
  42 /* These are OS-specific and defined below. */
  43 typedef  struct _IICreateImageInfo    IICreateImageInfo;
  44 typedef  struct _IIFinaliseImageInfo  IIFinaliseImageInfo;
  45
  46 /* This is a two stage process.  The first stage, which is most of the
  47    work, creates the initial image in memory to the extent possible.
  48    To do this it takes a bundle of information in an IICreateImageInfo
  49    structure, which is gathered in an OS-specific way at startup.
  50    This returns an IIFinaliseImageInfo structure: */
  51 extern
  52 IIFinaliseImageInfo VG_(ii_create_image)( IICreateImageInfo,
  53                                           const VexArchInfo* vex_archinfo );
  54
  55 /* Just before starting the client, we may need to make final
  56    adjustments to its initial image.  Also we need to set up the VEX
  57    guest state for thread 1 (the root thread) and copy in essential
  58    starting values.  This is handed the IIFinaliseImageInfo created by
  59    VG_(ii_create_image). */
  60 extern
  61 void VG_(ii_finalise_image)( IIFinaliseImageInfo );
  62
  63 /* Note that both IICreateImageInfo and IIFinaliseImageInfo are
  64    OS-specific.  We now go on to give instantiations of them
  65    for supported OSes. */
  66
  67 /* ------------------------- Linux ------------------------- */
  68
  69 #if defined(VGO_linux)
  70
  71 struct _IICreateImageInfo {
  72    /* ------ Mandatory fields ------ */
  73    const HChar*  toolname;
  74    Addr    sp_at_startup;
  75    Addr    clstack_end; // Highest stack addressable byte
  76    /* ------ Per-OS fields ------ */
  77    HChar** argv;
  78    HChar** envp;
  79 };
  80
  81 struct _IIFinaliseImageInfo {
  82    /* ------ Mandatory fields ------ */
  83    SizeT clstack_max_size;
  84    Addr  initial_client_SP;
  85    /* ------ Per-OS fields ------ */
  86    Addr  initial_client_IP;
  87    Addr  initial_client_TOC;
  88    UInt* client_auxv;
  89    /* ------ Arch-specific ELF loading state ------ */
  90    struct vki_arch_elf_state arch_elf_state;
  91 };
  92
  93 /* ------------------------- Darwin ------------------------- */
  94
  95 #elif defined(VGO_darwin)
  96
  97 struct _IICreateImageInfo {
  98    /* ------ Mandatory fields ------ */
  99    const HChar*  toolname;
 100    Addr    sp_at_startup;
 101    Addr    clstack_end; // highest stack addressable byte
 102    /* ------ Per-OS fields ------ */
 103    HChar** argv;
 104    HChar** envp;
 105    Addr    entry;            /* &_start */
 106    Addr    init_ip;          /* &__dyld_start, or copy of entry */
 107    Addr    stack_start;      /* stack segment hot */
 108    Addr    stack_end;        /* stack segment cold */
 109    Addr    text;             /* executable's Mach header */
 110    Bool    dynamic;          /* False iff executable is static */
 111    HChar*  executable_path;  /* path passed to execve() */
 112 };
 113
 114 struct _IIFinaliseImageInfo {
 115    /* ------ Mandatory fields ------ */
 116    SizeT clstack_max_size;
 117    Addr  initial_client_SP;
 118    /* ------ Per-OS fields ------ */
 119    Addr  initial_client_IP;
 120 };
 121
 122 /* ------------------------- Solaris ------------------------- */
 123
 124 #elif defined(VGO_solaris)
 125
 126 struct _IICreateImageInfo {
 127    /* ------ Mandatory fields ------ */
 128    const HChar* toolname;
 129    Addr    sp_at_startup;
 130    Addr    clstack_end; /* highest stack addressable byte */
 131    /* ------ Per-OS fields ------ */
 132    HChar** argv;
 133    HChar** envp;
 134 };
 135
 136 struct _IIFinaliseImageInfo {
 137    /* ------ Mandatory fields ------ */
 138    SizeT clstack_max_size;
 139    Addr  initial_client_SP;
 140    /* ------ Per-OS fields ------ */
 141    Addr  initial_client_IP;
 142    Addr  initial_client_TOC;
 143    UInt* client_auxv;
 144    Addr  initial_client_TP; /* thread pointer */
 145 };
 146
 147 #else
 148 #  error "Unknown OS"
 149 #endif
 150
 151
 152 #endif   // __PUB_CORE_INITIMG_H
 153
 154 /*--------------------------------------------------------------------*/
 155 /*--- end                                                          ---*/
 156 /*--------------------------------------------------------------------*/