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upx/src/packmast.cpp
Markus F.X.J. Oberhumer a627648249 all: assorted cleanups and updates 
Changes include:
  - add a bunch of "noexcept", mostly to operators and forceinline
  - use "uchar"
  - use "charptr"
  - rename options_t to Options
  - add ptr_check_no_overlap()
  - rewrite p_exe.cpp, NFCI
  - clang-format help.cpp
  - spelling fixes
2023-03-15 00:19:55 +01:00

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/* packmast.cpp --
This file is part of the UPX executable compressor.
Copyright (C) 1996-2023 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1996-2023 Laszlo Molnar
All Rights Reserved.
UPX and the UCL library are free software; you can redistribute them
and/or modify them 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; see the file COPYING.
If not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Markus F.X.J. Oberhumer Laszlo Molnar
<markus@oberhumer.com> <ezerotven+github@gmail.com>
*/
#include "conf.h"
#include "file.h"
#include "packmast.h"
#include "packer.h"
#include "lefile.h"
#include "pefile.h"
#include "p_elf.h"
#include "p_unix.h"
#include "p_com.h"
#include "p_djgpp2.h"
#include "p_exe.h"
#include "p_lx_exc.h"
#include "p_lx_elf.h"
#include "p_lx_interp.h"
#include "p_lx_sh.h"
#include "p_mach.h"
#include "p_ps1.h"
#include "p_sys.h"
#include "p_tmt.h"
#include "p_tos.h"
#include "p_vmlinx.h"
#include "p_vmlinz.h"
#include "p_w32pe_i386.h"
#include "p_w64pe_amd64.h"
#include "p_w64pe_arm64.h"
#include "p_wince_arm.h"
#include "p_wcle.h"
/*************************************************************************
//
**************************************************************************/
PackMaster::PackMaster(InputFile *f, Options *o) noexcept : fi(f) {
// replace global options with local options
if (o != nullptr) {
#if WITH_THREADS
std::lock_guard<std::mutex> lock(opt_lock_mutex);
#endif
saved_opt = o;
memcpy(&this->local_options, o, sizeof(*o)); // struct copy
opt = &this->local_options;
}
}
PackMaster::~PackMaster() noexcept {
delete packer;
packer = nullptr;
// restore global options
if (saved_opt != nullptr) {
#if WITH_THREADS
std::lock_guard<std::mutex> lock(opt_lock_mutex);
#endif
opt = saved_opt;
saved_opt = nullptr;
}
}
/*************************************************************************
//
**************************************************************************/
static Packer *try_can_pack(Packer *p, void *user) {
InputFile *f = (InputFile *) user;
try {
p->initPackHeader();
f->seek(0, SEEK_SET);
if (p->canPack()) {
if (opt->cmd == CMD_COMPRESS)
p->updatePackHeader();
f->seek(0, SEEK_SET);
return p;
}
} catch (const IOException &) {
} catch (...) {
delete p;
throw;
}
delete p;
return nullptr;
}
static Packer *try_can_unpack(Packer *p, void *user) {
InputFile *f = (InputFile *) user;
try {
p->initPackHeader();
f->seek(0, SEEK_SET);
int r = p->canUnpack();
if (r > 0) {
f->seek(0, SEEK_SET);
return p;
}
if (r < 0) {
// FIXME - could stop testing all other unpackers at this time
// see canUnpack() in packer.h
}
} catch (const IOException &) {
// ignored
} catch (...) {
delete p;
throw;
}
delete p;
return nullptr;
}
/*************************************************************************
//
**************************************************************************/
/*static*/
Packer *PackMaster::visitAllPackers(visit_func_t func, InputFile *f, const Options *o, void *user) {
#define D(Klass) \
ACC_BLOCK_BEGIN \
COMPILE_TIME_ASSERT(std::is_nothrow_destructible_v<Klass>) \
Klass *kp = new Klass(f); \
kp->assertPacker(); \
if (o->debug.debug_level) \
fprintf(stderr, "visitAllPackers: (ver=%d, fmt=%3d) %s\n", kp->getVersion(), \
kp->getFormat(), #Klass); \
Packer *p = func(kp, user); \
if (p != nullptr) \
return p; \
ACC_BLOCK_END
// NOTE: order of tries is important !!!
//
// .exe
//
if (!o->dos_exe.force_stub) {
// dos32
D(PackDjgpp2);
D(PackTmt);
D(PackWcle);
// Windows
// D(PackW64PeArm64EC); // NOT YET IMPLEMENTED
// D(PackW64PeArm64); // NOT YET IMPLEMENTED
D(PackW64PeAmd64);
D(PackW32PeI386);
D(PackWinCeArm);
}
D(PackExe); // dos/exe
//
// linux kernel
//
D(PackVmlinuxARMEL);
D(PackVmlinuxARMEB);
D(PackVmlinuxPPC32);
D(PackVmlinuxPPC64LE);
D(PackVmlinuxAMD64);
D(PackVmlinuxI386);
D(PackVmlinuzI386);
D(PackBvmlinuzI386);
D(PackVmlinuzARMEL);
//
// linux
//
if (!o->o_unix.force_execve) {
if (o->o_unix.use_ptinterp) {
D(PackLinuxElf32x86interp);
}
D(PackFreeBSDElf32x86);
D(PackNetBSDElf32x86);
D(PackOpenBSDElf32x86);
D(PackLinuxElf32x86);
D(PackLinuxElf64amd);
D(PackLinuxElf32armLe);
D(PackLinuxElf32armBe);
D(PackLinuxElf64arm);
D(PackLinuxElf32ppc);
D(PackLinuxElf64ppc);
D(PackLinuxElf64ppcle);
D(PackLinuxElf32mipsel);
D(PackLinuxElf32mipseb);
D(PackLinuxI386sh);
}
D(PackBSDI386);
D(PackMachFat); // cafebabe conflict
D(PackLinuxI386); // cafebabe conflict
// Mach (Darwin / macOS)
D(PackDylibAMD64);
D(PackMachPPC32); // TODO: this works with upx 3.91..3.94 but got broken in 3.95; FIXME
D(PackMachI386);
D(PackMachAMD64);
D(PackMachARMEL);
D(PackMachARM64EL);
// 2010-03-12 omit these because PackMachBase<T>::pack4dylib (p_mach.cpp)
// does not understand what the Darwin (Apple Mac OS X) dynamic loader
// assumes about .dylib file structure.
// D(PackDylibI386);
// D(PackDylibPPC32);
//
// misc
//
D(PackTos); // atari/tos
D(PackPs1); // ps1/exe
D(PackSys); // dos/sys
D(PackCom); // dos/com
return nullptr;
#undef D
}
/*static*/ Packer *PackMaster::getPacker(InputFile *f) {
Packer *p = visitAllPackers(try_can_pack, f, opt, f);
if (!p)
throwUnknownExecutableFormat();
return p;
}
/*static*/ Packer *PackMaster::getUnpacker(InputFile *f) {
Packer *p = visitAllPackers(try_can_unpack, f, opt, f);
if (!p)
throwNotPacked();
return p;
}
/*************************************************************************
// delegation from work.cpp
**************************************************************************/
void PackMaster::pack(OutputFile *fo) {
assert(packer == nullptr);
packer = getPacker(fi);
packer->doPack(fo);
}
void PackMaster::unpack(OutputFile *fo) {
assert(packer == nullptr);
packer = getUnpacker(fi);
packer->doUnpack(fo);
}
void PackMaster::test() {
assert(packer == nullptr);
packer = getUnpacker(fi);
packer->doTest();
}
void PackMaster::list() {
assert(packer == nullptr);
packer = getUnpacker(fi);
packer->doList();
}
void PackMaster::fileInfo() {
assert(packer == nullptr);
packer = visitAllPackers(try_can_unpack, fi, opt, fi);
if (!packer)
packer = visitAllPackers(try_can_pack, fi, opt, fi);
if (!packer)
throwUnknownExecutableFormat(nullptr, 1); // make a warning here
packer->doFileInfo();
}
/* vim:set ts=4 sw=4 et: */
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