Cannot build on Big endian platform #24
Comments
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There is a bug in the endings detection... We are working on it |
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I have pull request for this already. you can review and consider for merge it |
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Pull request merged. |
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When I build on ARM 64 this error happen， I'm on the llvm-4.0 branch In file included from /home/ubuntu/obfuscator/include/llvm/Transforms/Obfuscation/BogusControlFlow.h:37:0, |
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Errors also occur when I built on ARM 32 with llvm-3.4 branch: In file included from /root/obfuscator/include/llvm/Transforms/Obfuscation/Flattening.h:27:0, |
The Select insn in BPF is expensive as BPF backend needs to resolve with conditionals. This patch set the getCmpSelInstrCost() to SCEVCheapExpansionBudget for Select insn to prevent some Select insn related optimizations. This change is motivated during bcc code review for iovisor/bcc#3270 where IndVarSimplifyPass eventually caused generating the following asm code: ; for (i = 0; (i < VIRTIO_MAX_SGS) && (i < num); i++) { 14: 16 05 40 00 00 00 00 00 if w5 == 0 goto +64 <LBB0_6> 15: bc 51 00 00 00 00 00 00 w1 = w5 16: 04 01 00 00 ff ff ff ff w1 += -1 17: 67 05 00 00 20 00 00 00 r5 <<= 32 18: 77 05 00 00 20 00 00 00 r5 >>= 32 19: a6 01 01 00 05 00 00 00 if w1 < 5 goto +1 <LBB0_4> 20: b7 05 00 00 06 00 00 00 r5 = 6 00000000000000a8 <LBB0_4>: 21: b7 02 00 00 00 00 00 00 r2 = 0 22: b7 01 00 00 00 00 00 00 r1 = 0 ; for (i = 0; (i < VIRTIO_MAX_SGS) && (i < num); i++) { 23: 7b 1a e0 ff 00 00 00 00 *(u64 *)(r10 - 32) = r1 24: 7b 5a c0 ff 00 00 00 00 *(u64 *)(r10 - 64) = r5 Note that insn heroims#15 has w1 = w5 and w1 is refined later but r5(w5) is eventually saved on stack at insn heroims#24 for later use. This cause later verifier failures. With this change, IndVarSimplifyPass won't do the above transformation any more. Differential Revision: https://reviews.llvm.org/D97479 (cherry picked from commit 1959ead525b8830cc8a345f45e1c3ef9902d3229)
When I build on PowerPC 64 this error happen
[ 23%] Building CXX object lib/Transforms/Obfuscation/CMakeFiles/LLVMObfuscation.dir/BogusControlFlow.cpp.o
In file included from /home/llvm-obfuscator/obfuscator/include/llvm/Transforms/Obfuscation/Substitution.h:26:0,
from /home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/Substitution.cpp:15:
/home/u0015999/llvm-obfuscator/obfuscator/include/llvm/CryptoUtils.h:80:2: error: #error "Unknown endianness of the compilation platform, check this header aes_encrypt.h"
#error
^
In file included from /home/llvm-obfuscator/obfuscator/include/llvm/Transforms/Obfuscation/BogusControlFlow.h:37:0,
from /home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/BogusControlFlow.cpp:93:
/home/llvm-obfuscator/obfuscator/include/llvm/CryptoUtils.h:80:2: error: #error "Unknown endianness of the compilation platform, check this header aes_encrypt.h"
#error
^
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp: In member function ‘unsigned int llvm::CryptoUtils::scramble32(unsigned int, const char_)’:
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp:545:20: error: ‘LOAD32H’ was not declared in this scope
LOAD32H(tmpA, key);
^
/home//llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp: In member function ‘void llvm::CryptoUtils::inc_ctr()’:
/home/u0015999/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp:658:25: error: ‘LOAD64H’ was not declared in this scope
LOAD64H(iseed, ctr + 8);
^
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp:660:26: error: ‘STORE64H’ was not declared in this scope
STORE64H(ctr + 8, iseed);
^
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp: In member function ‘uint32_t llvm::CryptoUtils::get_uint32_t()’:
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp:735:19: error: ‘LOAD32H’ was not declared in this scope
LOAD32H(ret, tmp);
^
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp: In member function ‘uint64_t llvm::CryptoUtils::get_uint64_t()’:
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp:748:19: error: ‘LOAD64H’ was not declared in this scope
LOAD64H(ret, tmp);
^
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp: In member function ‘void llvm::CryptoUtils::aes_compute_ks(uint32_t_, const char_)’:
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp:787:19: error: ‘LOAD32H’ was not declared in this scope
LOAD32H(ks[0], k);
^
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp: In member function ‘void llvm::CryptoUtils::aes_encrypt(char_, const char_, const uint32_t_)’:
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp:819:25: error: ‘LOAD32H’ was not declared in this scope
LOAD32H(state0, in + 0);
^
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp:868:27: error: ‘STORE32H’ was not declared in this scope
STORE32H(out + 0, state0);
^
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp: In static member function ‘static int llvm::CryptoUtils::sha256_compress(llvm::CryptoUtils::sha256_state_, unsigned char_)’:
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp:921:32: error: ‘LOAD32H’ was not declared in this scope
LOAD32H(W[i], buf + (4 * i));
^
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp: In member function ‘int llvm::CryptoUtils::sha256_done(llvm::CryptoUtils::sha256_state_, unsigned char_)’:
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp:1064:36: error: ‘STORE64H’ was not declared in this scope
STORE64H(md->buf + 56, md->length);
^
/home/llvm-obfuscator/obfuscator/lib/Transforms/Obfuscation/CryptoUtils.cpp:1069:41: error: ‘STORE32H’ was not declared in this scope
STORE32H(out + (4 * i), md->state[i]);
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