wargio / libvle Goto Github PK

I have compiled the project using make.exe and it gave me a static library (.a file extension)
Then i imported the static library into my Qt project.
I wanna paste the code that you have written in 'example' section in your README file but there is one argument 'buffer' is missed.
What is the 'buffer' argument in vle_init(...) and what should i pass ??

hi, seems it's not possible to disasm bytes 32 e4 00 60

from IDA

.text:00000000  32 E4 00 60                 e_lbz     r23, 0x60(r4)

Hi,
I am developing yet another PPC disasm several month ago. Right now I compare codes of different authors (like qemu_ppc, etc). I reviewed and tried out your code already. Please see my findings, and accept the pull request. The first one is tst1 for test the actual code, the second one is fix1, which contains the fixes.

Findigs (E:error, C:cosmetic):
E: vle_next() can return one more se_* after end pos. (there's no range check)
C: vle_next() pos incremented after range check, multiple checks occures. Can be a better order of those.
E: some op filter masks are wrong (testcases will be inculded soon)
E: some ops are missing
C: compiler can make sign extension some cases, U suffix for constants may be a good idea.
C: header file isn't c++ compatible, use ifdef __cplusplus and extern "C" kind of thing...
E: some operand fields are handled wrong. (i.e. using of spr nr and extended register nr.) So, even if the op filter fixed or new rule added, the reported operands will be wrong.
E: one of the break is missing from a switch/case.
C: E_NONE is used instead of F_NONE around switch default cases.

Thanks, B.

hi, seems it's not possible to disasm bytes 5b 86 00 58

from Ghidra I get:

 00000038 5b  86  00  58    e_lhz      r28 ,0x58 (r6)

Hi!
I was considering basing a VLE architecture plugin for Binary Ninja around this library, but first I'd like to get some clarification about what software license I'd be subject to.

Could you add a software license to the repo? https://help.github.com/articles/licensing-a-repository/
Thanks!

edit
I see there's an LGPL reference at the top of vle_internal.h. I'd be happy to put together a pull request to include the LGPL in the project if that license was your intended one. :)

It's not possible to disasm bytes 7C 00 22 78 seems only IDA can do it atm

seg000:000D9FB0 7C 00 22 78                 xor       r0, r0, r4

		{ "e_srwi."     , 0x7C000471, 0x7C000471 | E_MASK_X   , E_XRA   , {TYPE_REG, TYPE_REG, TYPE_IMM, TYPE_NONE, TYPE_NONE}},
		{ "e_stb"       , 0x34000000, 0x34000000 | E_MASK_D   , E_D     , {TYPE_REG, TYPE_MEM, TYPE_IMM, TYPE_NONE, TYPE_NONE}},
		{ "e_stbu"      , 0x18000400, 0x18000400 | E_MASK_D8  , E_D8    , {TYPE_REG, TYPE_MEM, TYPE_REG, TYPE_NONE, TYPE_NONE}},

Shouldn't the third type in the list for e_stb be TYPE_REG?

Hi, seems the branch dest address decoding/calculation is incorrect(?)

==================================== 
libvle
====================================
 
.Bin:0009b7f0 78050C61                   e_bl 0x50c60
.Bin:0009b7f4 79FACB5F                   e_bl 0xfdfacb5e
.Bin:0009b7f8 79F69BAF                   e_bl 0xfdf69bae
.Bin:0009b7fc 79FACB59                   e_bl 0xfdfacb58

====================================
IDA
====================================

ROM:0009B7F0             # Segment type: Pure code
ROM:0009B7F0                             .section "ROM",text_vle
ROM:0009B7F0 78 05 0C 61                 e_bl      0xEC450
ROM:0009B7F4 79 FA CB 5F                 e_bl      0x48352
ROM:0009B7F8 79 F6 9B AF                 e_bl      0x53A6
ROM:0009B7FC 79 FA CB 59                 e_bl      0x48354
ROM:0009B7FC

====================================  
//Ghidra  0009b7f0
====================================   

0009b7f0 78 05 0c 61     e_bl       SUB_000ec450
0009b7f4 79 fa cb 5f     e_bl       SUB_00048352
0009b7f8 79 f6 9b af     e_bl       SUB_000053a6
0009b7fc 79 fa cb 59     e_bl       SUB_00048354

hi, seems it's not possible to disasm bytes 7C 07 D8 EE

from IDA

ROM:00000000             # Segment type: Pure code
ROM:00000000                             .section "ROM",text_vle
ROM:00000000 7C 07 D8 EE                 lbzux     r0, r7, r27

hi, seems it's not possible to disasm bytes 13 16 00 06

Testing with IDA and Ghidra I get:

ROM:00000048 13 16 00 06                 vcmpequb  v24, v22, v0

Hi, would be great if you could implement floating-point instructions support..seems only IDA, objdump can disasm the FPU instructions e.g.

10 60 02 D1     efscfsi   r3, r0
13 a3 02 c9 	efsdiv  r29,r3,r0

even the NSA baby (Ghidra 9.0.1) failed on this :(

thanks for this lib. I started playing with ppc32 arch and I noticed incorrect disassembly of instruction:

7A 20 FF F8                   e_bgectr cr0 0xfffffff8

seems it should be e_bdnz at least that's what IDA prints (other tools like Ghidra failed to disasm this instr)

7A 20 FF F8                 e_bdnz    loc_4028E