mirror of
https://github.com/Zenithsiz/ftmemsim-valgrind.git
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6118f9352c
work: start with with the correct toc pointer (r2), rather than some nonsense value. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@5465
132 lines
5.1 KiB
C
132 lines
5.1 KiB
C
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/*--------------------------------------------------------------------*/
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/*--- User-mode execve. pub_core_ume.h ---*/
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/*--------------------------------------------------------------------*/
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/*
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This file is part of Valgrind, a dynamic binary instrumentation
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framework.
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Copyright (C) 2000-2005 Julian Seward
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jseward@acm.org
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307, USA.
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The GNU General Public License is contained in the file COPYING.
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*/
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#ifndef __PUB_CORE_UME_H
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#define __PUB_CORE_UME_H
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//--------------------------------------------------------------------
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// PURPOSE: This module implements user-mode execve, ie. program loading
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// and exec'ing. It is shared between stage1 and stage2.
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//--------------------------------------------------------------------
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#include <elf.h>
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#include <sys/types.h>
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/*------------------------------------------------------------*/
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/*--- General stuff ---*/
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/*------------------------------------------------------------*/
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/* This is only here so it can be shared between stage1 and stage2 */
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/* JRS 9 Aug 05: both of these are apparently unused, except by
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memcheck/tests/vgtest_ume.c. */
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//zz extern
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//zz void VG_(foreach_map)(int (*fn)(char *start, char *end,
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//zz const char *perm, off_t offset,
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//zz int maj, int min, int ino, void* extra),
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//zz void* extra);
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//zz
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//zz /* Jump to 'dst', but first set the stack pointer to 'stack'. Also,
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//zz clear all the integer registers before entering 'dst'. It's
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//zz important that the stack pointer is set to exactly 'stack' and not
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//zz (eg) stack - apparently_harmless_looking_small_offset. Basically
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//zz because the code at 'dst' might be wanting to scan the area above
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//zz 'stack' (viz, the auxv array), and putting spurious words on the
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//zz stack confuses it.
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//zz
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//zz This is only exported so that vgtest_ume.c can use it.
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//zz */
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//zz extern
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//zz __attribute__((noreturn))
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//zz void VG_(jump_and_switch_stacks) ( Addr stack, Addr dst );
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/*------------------------------------------------------------*/
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/*--- Loading ELF files ---*/
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/*------------------------------------------------------------*/
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// Info needed to load and run a program. IN/INOUT/OUT refers to the
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// inputs/outputs of do_exec().
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typedef
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struct {
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HChar** argv; // IN: the original argv
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Addr exe_base; // INOUT: lowest (allowed) address of exe
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Addr exe_end; // INOUT: highest (allowed) address
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Addr phdr; // OUT: address phdr was mapped at
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Int phnum; // OUT: number of phdrs
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Addr interp_base; // OUT: where interpreter (ld.so) was mapped
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Addr entry; // OUT: entrypoint in main executable
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Addr init_ip; // OUT: address of first instruction to execute
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Addr brkbase; // OUT: base address of brk segment
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Addr init_toc; // OUT: address of table-of-contents, on
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// platforms for which that makes sense
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// (ppc64-linux only)
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// These are the extra args added by #! scripts
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HChar* interp_name; // OUT: the interpreter name
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HChar* interp_args; // OUT: the args for the interpreter
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}
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ExeInfo;
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// Do a number of appropriate checks to see if the file looks executable by
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// the kernel: ie. it's a file, it's readable and executable, and it's in
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// either ELF or "#!" format. On success, 'out_fd' gets the fd of the file
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// if it's non-NULL. Otherwise the fd is closed.
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extern SysRes VG_(pre_exec_check)(const HChar* exe_name, Int* out_fd);
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// Does everything short of actually running 'exe': finds the file,
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// checks execute permissions, sets up interpreter if program is a script,
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// reads headers, maps file into memory, and returns important info about
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// the program.
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extern Int VG_(do_exec)(const HChar* exe, ExeInfo* info);
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/*------------------------------------------------------------*/
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/*--- Finding and dealing with auxv ---*/
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/*------------------------------------------------------------*/
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struct ume_auxv
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{
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Word a_type;
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union {
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void *a_ptr;
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Word a_val;
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} u;
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};
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extern struct ume_auxv *VG_(find_auxv)(UWord* orig_esp);
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#endif /* __PUB_CORE_UME_H */
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/*--------------------------------------------------------------------*/
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/*--- end ---*/
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/*--------------------------------------------------------------------*/
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