[PATCH] D32991: [ELF] Initial migration of AVR target

[Leslie Zhai via Phabricator via llvm-commits]

xiangzhai added a comment.

Dear Dylan,

LLVM AVR backend's `printInstruction` issue:

generated by clang

  lldb /data/project/LLVM/llvm/build/bin/llvm-objdump
  (lldb) target create "/data/project/LLVM/llvm/build/bin/llvm-objdump"
  Current executable set to '/data/project/LLVM/llvm/build/bin/llvm-objdump' (x86_64).
  (lldb) r -d clang-BareMinimum
  Process 16278 launched: '/data/project/LLVM/llvm/build/bin/llvm-objdump' (x86_64)
  
  clang-BareMinimum:      file format ELF32-avr
  
  Disassembly of section .text:
  setup:
     11000:       08 95   ret
  
  loop:
     11002:       08 95   ret
  
  main:
     11004:       80 e0   ldi     0, Process 16278 stopped
  * thread #1, name = 'llvm-objdump', stop reason = signal SIGSEGV: invalid address (fault address: 0x0)
      frame #0: 0x00007ffff6ca35d3 libLLVM-5.0svn.so`llvm::MCExpr::print(llvm::raw_ostream&, llvm::MCAsmInfo const*, bool) const + 67
  libLLVM-5.0svn.so`llvm::MCExpr::print:
  ->  0x7ffff6ca35d3 <+67>: movl   (%rbx), %eax
      0x7ffff6ca35d5 <+69>: cmpq   $0x3, %rax
      0x7ffff6ca35d9 <+73>: ja     0x7ffff6ca3ae7            ; <+1367>
      0x7ffff6ca35df <+79>: movslq (%rbp,%rax,4), %rax
  (lldb) bt
  * thread #1, name = 'llvm-objdump', stop reason = signal SIGSEGV: invalid address (fault address: 0x0)
    * frame #0: 0x00007ffff6ca35d3 libLLVM-5.0svn.so`llvm::MCExpr::print(llvm::raw_ostream&, llvm::MCAsmInfo const*, bool) const + 67
      frame #1: 0x00007ffff7912c88 libLLVM-5.0svn.so`llvm::AVRInstPrinter::printInstruction(llvm::MCInst const*, llvm::raw_ostream&) + 872
      frame #2: 0x00007ffff7913858 libLLVM-5.0svn.so`llvm::AVRInstPrinter::printInst(llvm::MCInst const*, llvm::raw_ostream&, llvm::StringRef, llvm::MCSubtargetInfo const&) + 520
      frame #3: 0x0000000000226c9f llvm-objdump`(anonymous namespace)::PrettyPrinter::printInst(llvm::MCInstPrinter&, llvm::MCInst const*, llvm::ArrayRef<unsigned char>, unsigned long, llvm::raw_ostream&, llvm::StringRef, llvm::MCSubtargetInfo const&, (anonymous namespace)::SourcePrinter*) + 207
      frame #4: 0x0000000000234ec0 llvm-objdump`DisassembleObject(llvm::object::ObjectFile const*, bool) + 14288
      frame #5: 0x0000000000230e1f llvm-objdump`DumpObject(llvm::object::ObjectFile*, llvm::object::Archive const*) + 687
      frame #6: 0x0000000000226a4d llvm-objdump`main + 1309
      frame #7: 0x00007ffff3b902f1 libc.so.6`__libc_start_main(main=(llvm-objdump`main), argc=3, argv=0x00007fffffffdaa8, init=<unavailable>, fini=<unavailable>, rtld_fini=<unavailable>, stack_end=0x00007fffffffda98) at libc-start.c:289
      frame #8: 0x000000000022102a llvm-objdump`_start + 42
  (lldb)

or by avr-gcc

  lldb /data/project/LLVM/llvm/build/bin/llvm-objdump
  (lldb) target create "/data/project/LLVM/llvm/build/bin/llvm-objdump"
  Current executable set to '/data/project/LLVM/llvm/build/bin/llvm-objdump' (x86_64).
  (lldb) r -d avr-gcc-BareMinimum
  Process 15772 launched: '/data/project/LLVM/llvm/build/bin/llvm-objdump' (x86_64)
  
  avr-gcc-BareMinimum:    file format ELF32-avr
  
  Disassembly of section .text:
  __vectors:
         0:       0c 94 34 00  <unknown>
         4:       0c 94 3e 00  <unknown>
         8:       0c 94 3e 00  <unknown>
         c:       0c 94 3e 00  <unknown>
        10:       0c 94 3e 00  <unknown>
        14:       0c 94 3e 00  <unknown>
        18:       0c 94 3e 00  <unknown>
        1c:       0c 94 3e 00  <unknown>
        20:       0c 94 3e 00  <unknown>
        24:       0c 94 3e 00  <unknown>
        28:       0c 94 3e 00  <unknown>
        2c:       0c 94 3e 00  <unknown>
        30:       0c 94 3e 00  <unknown>
        34:       0c 94 3e 00  <unknown>
        38:       0c 94 3e 00  <unknown>
        3c:       0c 94 3e 00  <unknown>
        40:       0c 94 3e 00  <unknown>
        44:       0c 94 3e 00  <unknown>
        48:       0c 94 3e 00  <unknown>
        4c:       0c 94 3e 00  <unknown>
        50:       0c 94 3e 00  <unknown>
        54:       0c 94 3e 00  <unknown>
        58:       0c 94 3e 00  <unknown>
        5c:       0c 94 3e 00  <unknown>
        60:       0c 94 3e 00  <unknown>
        64:       0c 94 3e 00  <unknown>
  
  __trampolines_start:
        68:       11 24   eor     Process 15772 stopped
  * thread #1, name = 'llvm-objdump', stop reason = signal SIGSEGV: invalid address (fault address: 0x6)
      frame #0: 0x00007ffff6ca35ed libLLVM-5.0svn.so`llvm::MCExpr::print(llvm::raw_ostream&, llvm::MCAsmInfo const*, bool) const + 93
  libLLVM-5.0svn.so`llvm::MCExpr::print:
  ->  0x7ffff6ca35ed <+93>:  movl   (%rdi), %eax
      0x7ffff6ca35ef <+95>:  decl   %eax
      0x7ffff6ca35f1 <+97>:  cmpl   $0x1, %eax
      0x7ffff6ca35f4 <+100>: ja     0x7ffff6ca3685            ; <+245>
  (lldb) bt
  * thread #1, name = 'llvm-objdump', stop reason = signal SIGSEGV: invalid address (fault address: 0x6)
    * frame #0: 0x00007ffff6ca35ed libLLVM-5.0svn.so`llvm::MCExpr::print(llvm::raw_ostream&, llvm::MCAsmInfo const*, bool) const + 93
      frame #1: 0x00007ffff7912a83 libLLVM-5.0svn.so`llvm::AVRInstPrinter::printInstruction(llvm::MCInst const*, llvm::raw_ostream&) + 355
      frame #2: 0x00007ffff7913858 libLLVM-5.0svn.so`llvm::AVRInstPrinter::printInst(llvm::MCInst const*, llvm::raw_ostream&, llvm::StringRef, llvm::MCSubtargetInfo const&) + 520
      frame #3: 0x0000000000226c9f llvm-objdump`(anonymous namespace)::PrettyPrinter::printInst(llvm::MCInstPrinter&, llvm::MCInst const*, llvm::ArrayRef<unsigned char>, unsigned long, llvm::raw_ostream&, llvm::StringRef, llvm::MCSubtargetInfo const&, (anonymous namespace)::SourcePrinter*) + 207
      frame #4: 0x0000000000234ec0 llvm-objdump`DisassembleObject(llvm::object::ObjectFile const*, bool) + 14288
      frame #5: 0x0000000000230e1f llvm-objdump`DumpObject(llvm::object::ObjectFile*, llvm::object::Archive const*) + 687
      frame #6: 0x0000000000226a4d llvm-objdump`main + 1309
      frame #7: 0x00007ffff3b902f1 libc.so.6`__libc_start_main(main=(llvm-objdump`main), argc=3, argv=0x00007fffffffda98, init=<unavailable>, fini=<unavailable>, rtld_fini=<unavailable>, stack_end=0x00007fffffffda88) at libc-start.c:289
      frame #8: 0x000000000022102a llvm-objdump`_start + 42
  (lldb) 

Regards,
Leslie Zhai


Repository:
  rL LLVM

https://reviews.llvm.org/D32991