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__ __ ___ _ __ __ __ __ ___ _____ ____
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\ \/ / / __\/ | / /_ / / \ \/ / / __\|___ / |___ \
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\ / / / | || '_ \ / / \ / / / |_ \ __) |
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/ \ / /___ | || (_) | / / / \ / /___ ___) | / __/
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/_/\_\\____/ |_| \___/ /_/ /_/\_\\____/ |____/ |_____|
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r e s t r i c t i o n r e m o v a l r e v 4
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....eevblog member cv007.......................................................
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section1 -binary mods
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section2 -project settings (if not wanting to modify binary file)
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section3 -extra info
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...............................................................................
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///////////////////////////////////////////////////////////////////////////////
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Section1
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binary mods with hex editor for xc16, xc32, Windows, Linux, OSX
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change byte(s) at file offset as specified
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make backup copies first in case edit goes wrong
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make sure hex editor is REPLACING bytes and not adding additional bytes
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the GPL license allows you to modify the binaries listed here
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///////////////////////////////////////////////////////////////////////////////
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---------------------
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| xc16 version 1.33 |
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----------------------------------------------------------------------Windows--
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File: C:\Program Files\Microchip\xc16\v1.33\bin\bin\elf-cc1.exe
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Offset: 0x161E7E
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Change: 0x85 to 0x84
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-------------------------------------------------------------------------Linux-
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File: /opt/microchip/xc16/v1.33/bin/bin/elf-cc1
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Offset: 0x42ADBE
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Change: 0x85 to 0x84
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---------------------------------------------------------------------------OSX-
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File: /Applications/microchip/xc16/v1.33/bin/bin/elf-cc1
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Offset: 0x64CCC7
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Change: 0x85 to 0x84
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-------------------------------------------------------------------------------
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---------------------
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| xc32 version 1.44 |
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----------------------------------------------------------------------Windows--
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Dir: C:\Program Files\Microchip\xc32\v1.44\bin\bin\gcc\pic32mx\4.8.3\
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File: cc1plus Offset: 0x775510 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: cc1 Offset: 0x6C4410 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: lto1 Offset: 0x665010 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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-------------------------------------------------------------------------Linux-
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Dir: /opt/microchip/xc32/v1.44/bin/bin/gcc/pic32mx/4.8.3/
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File: cc1plus Offset: 0xB330B0 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: cc1 Offset: 0xA430B0 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: lto1 Offset: 0x9B1F70 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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---------------------------------------------------------------------------OSX-
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Dir: /Applications/microchip/xc32/v1.44/bin/bin/gcc/pic32mx/4.8.3/
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File: cc1plus Offset: 0x?????? Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: cc1 Offset: 0x?????? Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: lto1 Offset: 0x?????? Change: FFFFFFFFFFFFFFFF to 0600000000000000
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-------------------------------------------------------------------------------
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-------------------
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xc32 version 2.05 |
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----------------------------------------------------------------------Windows--
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Dir: C:\Program Files\Microchip\xc32\v2.05\bin\bin\gcc\pic32mx\4.8.3\
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File: cc1plus Offset: 0x774310 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: cc1 Offset: 0x6c3210 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: lto1 Offset: 0x664010 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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-------------------------------------------------------------------------Linux-
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Dir: /opt/microchip/xc32/v2.05/bin/bin/gcc/pic32mx/4.8.3/
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File: cc1plus Offset: 0xB320B0 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: cc1 Offset: 0xA420B0 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: lto1 Offset: 0x9B0F70 Change: FFFFFFFFFFFFFFFF to 0600000000000000
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---------------------------------------------------------------------------OSX-
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Dir: /Applications/microchip/xc32/v2.05/bin/bin/gcc/pic32mx/4.8.3/
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File: cc1plus Offset: 0x?????? Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: cc1 Offset: 0x?????? Change: FFFFFFFFFFFFFFFF to 0600000000000000
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File: lto1 Offset: 0x?????? Change: FFFFFFFFFFFFFFFF to 0600000000000000
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///////////////////////////////////////////////////////////////////////////////
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Section2
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XC32 C Compiler - run without restrictions
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tested with v1.44 (should also work with v1.42,1.43)
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tested with v2.05
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relevant files from the source code-
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xc32-v1.44-src/gcc/gcc/config/pic32/mchp.c
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xc32-v1.44-src/gcc/gcc/config/pic32/mchp.opt
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xc32-v2.05-src/pic32m-source/src48x/gcc/gcc/config/pic32/mchp.c
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xc32-v2.05-src/pic32m-source/src48x/gcc/gcc/config/pic32/mchp.opt
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///////////////////////////////////////////////////////////////////////////////
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create a file in the project folder, name it specs.txt (name not important)
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in that file add these three lines (second is blank)-
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*cc1:+ -mafrlcsj
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*cc1plus:+ -mafrlcsj
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then, in the project properites, under Categories, select XC32 (Global Options)
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in the Additional options field add the following option-
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-specs=specs.txt
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then press the OK button to close the dialog box
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(specs.txt name has to match the name of the created file)
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>>>>>> Explanation
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source code shows that MCHP has added an option to override the results of
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the license check, the option is -mafrlcsj
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the XC32-gcc and XC32-g++ front ends that are first called when compiling
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code, check the options provided and specifically remove the -mafrlcsj option
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and then exec's /bin/xc32-gcc (or /bin/xc32-g++) with the original options
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less the -mafrlcsj option if used
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if you can get the -mafrlcsj option to make it past the initial xc32-gcc/g++,
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then that option will work- in the case of XC32 the license check will run, but
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the results will be overridden if the -mafrlcsj option is present and removes
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all restrictions
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the way to prevent xc32-gcc/g++ from stripping that option is to instead
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provide a specs file that adds to the default specs the -mafrlcsj option
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///////////////////////////////////////////////////////////////////////////////
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XC16 C Compiler - run without restrictions
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tested with v1.33 (should also work with ver 1.26,1.30,1.31,1.32B)
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relevant files from the source code-
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v1.33.src/src/XC_GCC/gcc/gcc/config/pic30/pic30.c
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v1.33.src/src/XC_GCC/gcc/gcc/config/pic30/pic30.opt
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///////////////////////////////////////////////////////////////////////////////
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****** Simple option, no modification of any files
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same as XC32 , except there is no c++, so only the first line of the specs
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file is needed-
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*cc1:+ -mafrlcsj
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///////////////////////////////////////////////////////////////////////////////
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// Section3 - extra info
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///////////////////////////////////////////////////////////////////////////////
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#linux script used to get xc32 file location for 'mchp_pic32_license_valid'
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#cd to correct folder
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for f in cc1plus cc1 lto1; do
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[ -e $f.bak ] || cp $f $f.bak
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a=($(objdump -T $f | grep mchp_pic32_license_valid))
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b=($(objdump -h $f | grep " .data "))
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offset=$((0X${a[0]}-0x${b[4]}+0x${b[5]}))
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printf "File: %-8s Offset: 0x%X Change: FFFFFFFFFFFFFFFF to 0600000000000000\n" $f $offset
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done
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#linux script used to change xc32 initial value for 'mchp_pic32_license_valid'
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#(instead of hex editor)
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#cd to correct folder
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for f in cc1plus cc1 lto1; do
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[ -e $f.bak ] || cp $f $f.bak
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a=($(objdump -T $f | grep mchp_pic32_license_valid))
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b=($(objdump -h $f | grep " .data "))
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offset=$((0X${a[0]}-0x${b[4]}+0x${b[5]}))
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printf "%0.8x: 0600 0000 0000 0000" $offset | xxd -r - $f
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done
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#xc16 , linux script to replace jne to je
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#looking for jne after move of 'mchp_mafrlcsj' bss var
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# 8472db5: 8b 35 a0 25 94 08 mov 0x89425a0,%esi
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# 8472dbb: 85 f6 test %esi,%esi
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# 8472dbd: 0f 85 d2 05 00 00 jne 8473395 <pic30_override_options+0x895>
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#cd to correct folder
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for f in elf-cc1 coff-cc1; do
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[ -e $f.bak ] || cp $f $f.bak
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a=$(objdump -T $f | grep mchp_mafrlcsj)
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a=${a:6:2}${a:4:2}${a:2:2}${a:0:2}
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old="\(8b..${a}....0f\)85"
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new="\184"
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xxd -ps $f.bak | sed "s:$old:$new:" | xxd -r -p - $f
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done
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Windows process used to find var file offset address to change-
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using mingw objdump, get disassembly and section info-
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(section info appended to end of each file)
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C:\Program Files\Microchip\xc32\v2.05\bin\bin\gcc\pic32mx\4.8.3>objdump -d cc1.exe > cc1.txt
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C:\Program Files\Microchip\xc32\v2.05\bin\bin\gcc\pic32mx\4.8.3>objdump -d cc1plus.exe > cc1plus.txt
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C:\Program Files\Microchip\xc32\v2.05\bin\bin\gcc\pic32mx\4.8.3>objdump -d lto1.exe > lto1.txt
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C:\Program Files\Microchip\xc32\v2.05\bin\bin\gcc\pic32mx\4.8.3>objdump -h cc1.exe >> cc1.txt
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C:\Program Files\Microchip\xc32\v2.05\bin\bin\gcc\pic32mx\4.8.3>objdump -h cc1plus.exe >> cc1plus.txt
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C:\Program Files\Microchip\xc32\v2.05\bin\bin\gcc\pic32mx\4.8.3>objdump -h lto1.exe >> lto1.txt
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open each exe in hex editor, search for string-
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Could not retrieve compiler license (%s)
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note file offset address
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cc1.exe 0x729e54
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cc1plus.exe 0x7f2cc8
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lto1.exe 0x6d4368
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find section address from file offset (from section info )
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cc1.exe----------------------------------------\
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Idx Name Size VMA LMA File off Algn
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2 .rdata 00240cb8 00ace000 00ace000 006cc800 2**5
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string-file-offset - section-address = string-section-offset
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string-section-offset + section-vma-address = string-vma-address
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0x729e54 - 0x6cc800 = 0x5d654 + 0xace000 = 0xb2b654
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search for 0xb2b654 in cc1.txt-
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653117: 89 44 24 08 mov %eax,0x8(%esp)
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65311b: c7 44 24 04 54 b6 b2 movl $0xb2b654,0x4(%esp)
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653122: 00
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653123: c7 04 24 00 00 00 00 movl $0x0,(%esp)
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65312a: c7 05 10 40 ac 00 00 movl $0x0,0xac4010
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653131: 00 00 00
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653134: c7 05 14 40 ac 00 00 movl $0x0,0xac4014
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65313b: 00 00 00
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65313e: e8 4d 3b 3b 00 call 0xa06c90
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653143: a1 f0 57 e1 00 mov 0xe157f0,%eax
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653148: c7 44 24 04 b8 b5 b2 movl $0xb2b5b8,0x4(%esp)
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movl's loading 0x0000000000000000 to 0xac4010
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0xac4010 is our variable address
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now work back that address to file offset
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cc1.exe--------------------\
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Idx Name Size VMA LMA File off Algn
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1 .data 0000c420 00ac1000 00ac1000 006c0200 2**5
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var-vma-address - section-vma-address = var-section-offset
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var-section-offset + section-file-offset = var-file-offset
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0xac4010 - 0xac1000 = 0x3010 + 0x6c0200 = 0x6c3210
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0x6c3210 is our file offset address to change
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find that address in the hex editor
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should be 6 FF bytes, change first one to 06, the next five to 00
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do the same procedure for the other two files
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results-
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cc1.exe 0x6c3210
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cc1plus.exe 0x774310
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lto1.exe 0x664010
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Osx-
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need an OSX disassembler to essentially do the same
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