[Crash-utility] [ANNOUNCE] crash gcore command, version 1.5.0 is released

[Hatayama, Daisuke]

This is the release of crash gcore command, version 1.5.0.

The aim of this release is mainly to support v4.18 and newer kernels.

ChangeLog:

  - Fix the issue that special vmas such as vdso and vsyscall are not
    saved in a produced core file due to the commit
    78d683e838a60ec4ba4591cca4364cba84a9e626 titled "mm, fs: Add
    vm_ops->name as an alternative to arch_vma_name" and merged at
    v3.15-rc5, which replaced the way of naming special vma such as
    vdso and vsyscall.

  - Fix the issue that no NT_PRFPREG is collected due to repeated
    changes on the x86 FPU code in the upstream kernel. Note that
    although the issue that no NT_PRFPREG is collected is (probably
    temporarily) fixed, its content would be useless in most cases
    since the FPU registers to be saved in NT_PRFPREG are now read
    dynamically when a core file is created.

  - Change the logic of restoring general-purpose registers at
    interrupt contexts according to the commit
    ff467594f2a4be01a0fa5e9ffc223fa930d232dd titled "x86/asm/entry/64:
    Save all regs on interrupt entry" and merged at v4.2-rc2 where all
    the registers including callee-saved registers are saved on
    interrupt entry. Thus, we don't have to try to restore
    callee-saved registers in the function frames. I'm very happy.

  - Address the change of vsyscall logic that vsyscall page is not
    mapped in user-space if vsyscall=none is configured in the kernel
    command-line parameters by the commit
    87983c66bc02c9cd8e4a42e7924435145d52bb13 titled "x86_64, vsyscall:
    Turn vsyscalls all the way off when vsyscall==none" and merged at
    v3.18-rc3.

  - Fix NULL pointer dereference caused by the removal of old_rsp
    symbol by the commit 9854dd74c3f6af8d9d527de86c6074b7ed0495f1
    titled "x86: fix NULL pointer dereference caused by the removal of
    old_rsp" and merged at v4.0-rc3. But the commit simplifies how to
    save old_rsp and now it is saved in the bottom of kernel stack as
    part of a pt_regs structure object. Hence this also simplifies
    gcore's register restoration logic.

MD5 CheckSum:

  # md5sum ./crash-gcore-command-1.5.0.tar.gz
  b420bb5be8013c8482861171ff78fbaf  ./crash-gcore-command-1.5.0.tar.gz

--
Thanks.
HATAYAMA, Daisuke

-------------- next part --------------
A non-text attachment was scrubbed...
Name: crash-gcore-command-1.5.0.tar.gz
Type: application/x-gzip
Size: 53097 bytes
Desc: crash-gcore-command-1.5.0.tar.gz
URL: <http://listman.redhat.com/archives/crash-utility/attachments/20181130/ae3d3c6c/attachment.bin>