Re: svn commit: r339898 - head/lib/libc/amd64/sys

On 03/11/2018 11:29, Konstantin Belousov wrote:
> Some minimal amount of facts instead of guesses would be much more useful.
> 
Yeah, being sleep deprived and hurried (on my end) certainly doesn't help.
> What is the instruction which faulted ?  Disassemble the text at 0x2f5664.
> Regardless of what is the instruction, show either the output from
> 'x86info -f' on the machine, or cpu identification lines from the
> _verbose_ boot dmesg.
> 
It appears that 0x2f5664 does not exist:

Disassembly of section .init:

00000000002f565c <_init>:
  2f565c:       48 83 ec 08             sub    $0x8,%rsp
  2f5660:       e8 fb 3c f3 ff          callq  229360 <frame_dummy>
  2f5665:       e8 b6 ff ff ff          callq  2f5620
<__do_global_ctors_aux>
  2f566a:       48 83 c4 08             add    $0x8,%rsp
  2f566e:       c3                      retq

CPU ident:

CPU: Intel(R) Core(TM) i7-5500U CPU _at_ 2.40GHz (2394.52-MHz K8-class CPU)
  Origin="GenuineIntel"  Id=0x306d4  Family=0x6  Model=0x3d  Stepping=4

Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>

Features2=0x7ffafbbf<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,SDBG,FMA,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
  AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
  AMD Features2=0x121<LAHF,ABM,Prefetch>
  Structured Extended
Features=0x21c27ab<FSGSBASE,TSCADJ,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,NFPUSG,RDSEED,ADX,SMAP,PROCTRACE>
  Structured Extended Features3=0x9c000000<IBPB,STIBP,L1DFL,SSBD>
  XSAVE Features=0x1<XSAVEOPT>
  VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID
  TSC: P-state invariant, performance statistics
> make is statically linked, do dynamically linked program fault ?
> 
After some more checks, only the statically linked programs crash.

-- 
Charlie Li
Can't think of a witty .sigline today…

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