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Code Issues Releases Wiki Activity

Rewrote the new vmlinuz/i386 format in a more object-oriented way. This

Browse Source 
should hopefully also help adding support for filters and other
things.

committer: mfx <mfx> 976723821 +0000
This commit is contained in:
Markus F.X.J. Oberhumer 2000-12-13 16:10:21 +00:00
parent d266c6bff1
commit 04c3173ef3
7 changed files with 197 additions and 87 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/.cvsignore
View File

@ -4,6 +4,7 @@
*.pdb
*.upx
.gdbinit
.Attic
upx
upx_nrv
upx_nrv.*

14
src/Makefile
View File

@ -59,7 +59,7 @@ OBJECTS1 = \
packer$o packhead$o packmast$o \
p_com$o p_djgpp2$o p_exe$o p_lx_elf$o p_lx_sep$o p_lx_sh$o \
p_sys$o p_tmt$o p_tos$o \
p_unix$o p_w32pe$o p_wcle$o p_vmlinz$o
p_unix$o p_vmlinz$o p_w32pe$o p_wcle$o
# no exceptions or RTTI
OBJECTS2 = \
@ -122,7 +122,7 @@ LDFLAGS = -s
endif
LDFLAGS += -Wl,-Map,$(basename $@).map
LDLIBS =
##LDLIBS = -lz
LDLIBS = -lz
LIBDIRS =
DOS_LIBDIRS =
@ -164,7 +164,7 @@ DEFS += '-DUPX_CONFIG_H="config_h/linux.h"'
##CFLAGS_M += -mno-schedule-prologue
CFLAGS_M += -march=i386 -mcpu=pentium
CFLAGS_WERROR = -Werror
LDLIBS += -lmcheck -lz
LDLIBS += -lmcheck
ifeq (1,2) # checkergcc
CC = checkergcc
@ -435,7 +435,7 @@ packhead$o: packer.h
packmast$o: packmast.h packer.h lefile.h \
p_com.h p_djgpp2.h p_exe.h p_lx_elf.h p_lx_sep.h p_lx_sh.h \
p_sys.h p_tmt.h p_tos.h \
p_unix.h p_vxd.h p_w32pe.h p_wcle.h p_vmlinz.h
p_unix.h p_vmlinz.h p_vxd.h p_w32pe.h p_wcle.h
ui$o: packer.h ui.h
work$o: packer.h ui.h packmast.h
@ -456,13 +456,11 @@ p_tos$o: packer.h p_tos.h \
stub/l_t_n2d.h stub/l_t_n2ds.h
p_unix$o: packer.h p_unix.h p_elf.h \
stub/l_lx_n2b.h stub/l_lx_n2d.h
p_vmlinux$o: packer.h p_unix.h p_elf.h \
stub/l_lx_n2b.h stub/l_lx_n2d.h
p_vmlinz$o: packer.h p_vmlinz.h \
stub/l_vmlinz.h
p_w32pe$o: packer.h p_w32pe.h \
stub/l_w32pe.h
p_wcle$o: packer.h p_wcle.h lefile.h \
stub/l_wcle.h
p_vmlinz$o: packer.h p_vmlinz.h \
stub/l_vmlinz.h
# vi:nowrap

165
src/p_vmlinz.cpp
View File

@ -36,22 +36,26 @@
static const
#include "stub/l_vmlinz.h"
const unsigned kernel_entry = 0x100000;
const unsigned stack_during_uncompression = 0x90000;
static const unsigned kernel_entry = 0x100000;
static const unsigned stack_during_uncompression = 0x90000;
// from /usr/src/linux/arch/i386/boot/compressed/Makefile
const unsigned bzimage_offset = 0x100000;
const unsigned zimage_offset = 0x1000;
static const unsigned zimage_offset = 0x1000;
static const unsigned bzimage_offset = 0x100000;
PackvmlinuzI386::PackvmlinuzI386(InputFile *f) :
/*************************************************************************
//
**************************************************************************/
PackVmlinuzI386::PackVmlinuzI386(InputFile *f) :
super(f)
{
assert(sizeof(boot_sect_t) == 0x218);
}
int PackvmlinuzI386::getCompressionMethod() const
int PackVmlinuzI386::getCompressionMethod() const
{
if (M_IS_NRV2B(opt->method))
return M_NRV2B_LE32;
@ -61,25 +65,37 @@ int PackvmlinuzI386::getCompressionMethod() const
}
const int *PackvmlinuzI386::getFilters() const
const int *PackVmlinuzI386::getFilters() const
{
return NULL;
}
bool PackvmlinuzI386::canPack()
/*************************************************************************
//
**************************************************************************/
int PackVmlinuzI386::readHeader()
{
boot_sect_t h;
fi->readx(&h, sizeof(h));
if (h.boot_flag != 0xAA55)
return false;
return -1;
setup_size = (1 + (h.setup_sects ? h.setup_sects : 4)) * 0x200;
if (setup_size > file_size)
return false;
return -1;
bzImage = memcmp(h.hdrs, "HdrS", 4) == 0 && (h.load_flags & 1) != 0;
if (memcmp(h.hdrs, "HdrS", 4) == 0 && (h.load_flags & 1) != 0)
return UPX_F_BVMLINUZ_i386;
return UPX_F_VMLINUZ_i386;
}
bool PackVmlinuzI386::readKernel()
{
obuf.alloc(file_size);
fi->seek(0, SEEK_SET);
fi->readx(obuf, file_size);
@ -104,48 +120,42 @@ bool PackvmlinuzI386::canPack()
if (zf == 0)
return false;
ulen = gzread(zf, ibuf, ibuf.getSize());
return ulen > (unsigned) file_size;
return ulen > (unsigned) file_size && ulen < ibuf.getSize();
#endif
}
return false;
}
void PackvmlinuzI386::pack(OutputFile *fo)
/*************************************************************************
// vmlinuz specific
**************************************************************************/
bool PackVmlinuzI386::canPack()
{
return readHeader() == UPX_F_VMLINUZ_i386;
}
void PackVmlinuzI386::pack(OutputFile *fo)
{
if (!readKernel())
throwCantPack("kernel decompression failed");
// OutputFile::dump("kernel.img", ibuf, ulen);
MemBuffer setupbuf(setup_size);
memcpy(setupbuf, obuf, setup_size);
obuf.free();
obuf.allocForCompression(ibuf.getSize());
// FILE *f1 = fopen("kernel.img", "wb"); fwrite(ibuf, 1, ulen, f1); fclose(f1);
ph.u_len = ulen;
if (!compress(ibuf, obuf))
throwNotCompressible();
const unsigned clen = ph.c_len;
initLoader(nrv_loader, sizeof(nrv_loader));
const unsigned overlapoh = bzImage ? findOverlapOverhead(obuf, 512) : 0;
unsigned clen = ph.c_len;
if (bzImage)
{
// align everything to dword boundary - it is easier to handle
memset(obuf + clen, 0, 4);
clen = ALIGN_UP(clen, 4);
addLoader("LINUZ000""LBZIMAGE""IDENTSTR",
"+40D++++", // align the stuff to 4 byte boundary
"UPX1HEAD", // 32 byte
"LZCUTPOI""+0000000",
getDecompressor(),
"LINUZ990",
NULL
);
}
else
addLoader("LINUZ000""LZIMAGE0",
getDecompressor(),
"LINUZ990""IDENTSTR""UPX1HEAD",
@ -156,13 +166,77 @@ void PackvmlinuzI386::pack(OutputFile *fo)
MemBuffer loader(lsize);
memcpy(loader, getLoader(), lsize);
int e_len = bzImage ? getLoaderSectionStart("LZCUTPOI") : lsize;
patchPackHeader(loader, lsize);
if (bzImage)
patch_le32(loader, lsize, "ESI1", zimage_offset + lsize);
patch_le32(loader, lsize, "KEIP", kernel_entry);
patch_le32(loader, lsize, "STAK", stack_during_uncompression);
((boot_sect_t *)((unsigned char *)setupbuf))->sys_size = ALIGN_UP(lsize + clen, 16) / 16;
fo->write(setupbuf, setupbuf.getSize());
fo->write(loader, lsize);
fo->write(obuf, clen);
//if (!checkCompressionRatio(file_size, fo->getBytesWritten()))
// throwNotCompressible();
}
/*************************************************************************
// bvmlinuz specific
**************************************************************************/
bool PackBvmlinuzI386::canPack()
{
return readHeader() == UPX_F_BVMLINUZ_i386;
}
void PackBvmlinuzI386::pack(OutputFile *fo)
{
if (!readKernel())
throwCantPack("kernel decompression failed");
// OutputFile::dump("kernel.img", ibuf, ulen);
MemBuffer setupbuf(setup_size);
memcpy(setupbuf, obuf, setup_size);
obuf.free();
obuf.allocForCompression(ibuf.getSize());
ph.u_len = ulen;
if (!compress(ibuf, obuf))
throwNotCompressible();
const unsigned overlapoh = findOverlapOverhead(obuf, 512);
// align everything to dword boundary - it is easier to handle
unsigned clen = ph.c_len;
memset(obuf + clen, 0, 4);
clen = ALIGN_UP(clen, 4);
initLoader(nrv_loader, sizeof(nrv_loader));
addLoader("LINUZ000""LBZIMAGE""IDENTSTR",
"+40D++++", // align the stuff to 4 byte boundary
"UPX1HEAD", // 32 byte
"LZCUTPOI""+0000000",
getDecompressor(),
"LINUZ990",
NULL
);
const unsigned lsize = getLoaderSize();
MemBuffer loader(lsize);
memcpy(loader, getLoader(), lsize);
const int e_len = getLoaderSectionStart("LZCUTPOI");
assert(e_len > 0);
patchPackHeader(loader, lsize);
const unsigned d_len4 = ALIGN_UP(lsize - e_len, 4);
const unsigned decompr_pos = ALIGN_UP(ulen + overlapoh, 16);
const unsigned copy_size = clen + d_len4;
@ -176,9 +250,6 @@ void PackvmlinuzI386::pack(OutputFile *fo)
patch_le32(loader, e_len, "ECX0", copy_size / 4);
patch_le32(loader, e_len, "EDI0", bzimage_offset + edi);
patch_le32(loader, e_len, "ESI0", bzimage_offset + esi);
}
else
patch_le32(loader, lsize, "ESI1", zimage_offset + lsize);
patch_le32(loader, e_len, "KEIP", kernel_entry);
patch_le32(loader, e_len, "STAK", stack_during_uncompression);
@ -194,18 +265,26 @@ void PackvmlinuzI386::pack(OutputFile *fo)
// throwNotCompressible();
}
/*************************************************************************
//
// unpack
**************************************************************************/
int PackvmlinuzI386::canUnpack()
int PackVmlinuzI386::canUnpack()
{
return false;
}
void PackvmlinuzI386::unpack(OutputFile *)
void PackVmlinuzI386::unpack(OutputFile *)
{
// no uncompression support for this format, so
// no uncompression support for this format, so that
// it is possible to remove the original deflate code (>10KB)
throwCantUnpack("build a new kernel instead :-)");
}
/*
vi:ts=4:et
*/

40
src/p_vmlinz.h
View File

@ -25,15 +25,20 @@
markus.oberhumer@jk.uni-linz.ac.at ml1050@cdata.tvnet.hu
*/
#ifndef __UPX_P_VMLINZ_H
#define __UPX_P_VMLINZ_H
/*************************************************************************
// vmlinuz/i386 (zlib compressed Linux kernel image)
**************************************************************************/
class PackvmlinuzI386 : public Packer
class PackVmlinuzI386 : public Packer
{
typedef Packer super;
public:
PackvmlinuzI386(InputFile *f);
PackVmlinuzI386(InputFile *f);
virtual int getVersion() const { return 1; }
virtual int getFormat() const { return UPX_F_VMLINUZ_i386; }
virtual const char *getName() const { return "vmlinuz/386"; }
@ -47,6 +52,9 @@ public:
virtual int canUnpack();
protected:
virtual int readHeader();
virtual bool readKernel();
// virtual const upx_byte *getLoader() const;
// virtual int getLoaderSize() const;
@ -72,6 +80,32 @@ protected:
};
off_t setup_size;
bool bzImage;
unsigned long ulen;
};
/*************************************************************************
// bvmlinuz/i386 (zlib compressed Linux kernel image)
**************************************************************************/
class PackBvmlinuzI386 : public PackVmlinuzI386
{
typedef PackVmlinuzI386 super;
public:
PackBvmlinuzI386(InputFile *f) : super(f) { }
virtual int getFormat() const { return UPX_F_BVMLINUZ_i386; }
virtual const char *getName() const { return "bvmlinuz/386"; }
virtual void pack(OutputFile *fo);
virtual bool canPack();
};
#endif /* already included */
/*
vi:ts=4:et
*/

6
src/packmast.cpp
View File

@ -174,11 +174,9 @@ static Packer* try_packers(InputFile *f, try_function func)
return p;
if ((p = func(new PackLinuxI386sh(f),f)) != NULL)
return p;
#if 0
if ((p = func(new PackBvmlinuxI386(f),f)) != NULL)
if ((p = func(new PackBvmlinuzI386(f),f)) != NULL)
return p;
#endif
if ((p = func(new PackvmlinuzI386(f),f)) != NULL)
if ((p = func(new PackVmlinuzI386(f),f)) != NULL)
return p;
if ((p = func(new PackLinuxI386(f),f)) != NULL)
return p;

20
src/stub/Makefile
View File

@ -157,10 +157,6 @@ l_sys.h: l_sys.asx
$(NASM) -f bin -o $T.bin $<
$(BIN2H) $T.bin nrv2b_loader $@
l_tmt.h: l_tmt.asx
$(NASM) -f bin -o $T.bin $<
$(BIN2H) $T.bin nrv_loader $@
l_t_n2b.h: l_tos.s
$(CPP_A68K) -DNRV2B -o $T.i $<
$(A68K) $T.i
@ -185,7 +181,15 @@ l_t_n2ds.h: l_tos.s
$(O2BIN) $T.o $T.bin 'UPX1' 'UPX9'
$(BIN2H) $T.bin nrv2d_loader_small $@
l_vxd.h: l_vxd.asm
l_tmt.h: l_tmt.asx
$(NASM) -f bin -o $T.bin $<
$(BIN2H) $T.bin nrv_loader $@
l_vmlinz.h: l_vmlinz.asx
$(NASM) -f bin -o $T.bin $<
$(BIN2H) $T.bin nrv_loader $@
l_vxd.h: l_vxd.asx
$(NASM) -f bin -o $T.bin $<
$(BIN2H) $T.bin nrv_loader $@
@ -197,10 +201,6 @@ l_w32pe.h: l_w32pe.asx
$(NASM) -f bin -o $T.bin $<
$(BIN2H) $T.bin nrv_loader $@
l_vmlinz.h: l_vmlinz.asx
$(NASM) -f bin -o $T.bin $<
$(BIN2H) $T.bin nrv_loader $@
# /***********************************************************************
# // linux rules (exec, elf, sh, sep)
@ -301,10 +301,10 @@ l_t_n2bs.h: n2b_d.ash bits.ash $(DEPS1)
l_t_n2d.h: n2d_d.ash bits.ash $(DEPS1)
l_t_n2ds.h: n2d_d.ash bits.ash $(DEPS1)
l_tmt.h: n2b_d32.asy n2d_d32.asy $(DEPS2)
l_vmlinz.h: n2b_d32.asy n2d_d32.asy $(DEPS2)
l_vxd.h: n2b_d32.asy n2d_d32.asy $(DEPS2)
l_wcle.h: n2b_d32.asy n2d_d32.asy $(DEPS2)
l_w32pe.h: n2b_d32.asy n2d_d32.asy $(DEPS2)
l_vmlinz.h: n2b_d32.asy n2d_d32.asy $(DEPS2)
l_xe_n2b.o: n2b_d32.ash $(DEPS1)
l_6e_n2b.o: n2b_d32.ash $(DEPS1)

2
src/unupx.h
View File

@ -81,7 +81,7 @@ typedef unsigned upx_uint32;
#define UPX_F_LINUX_SEP_i386 13
#define UPX_F_LINUX_SH_i386 14
#define UPX_F_VMLINUZ_i386 15
#define UPX_F_BVMLINUX_i386 16
#define UPX_F_BVMLINUZ_i386 16
#define UPX_F_ATARI_TOS 129
#define UPX_F_SOLARIS_SPARC 130