[Bug libc/14890] New: Make NT_PRFPREG canonical.

["carlos_odonell at mentor dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=14890

             Bug #: 14890
           Summary: Make NT_PRFPREG canonical.
           Product: glibc
           Version: 2.17
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: unassigned@sourceware.org
        ReportedBy: carlos_odonell@mentor.com
                CC: drepper.fsp@gmail.com
    Classification: Unclassified


Created attachment 6761
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6761
Define NT_PRFPREG, leaving NT_FPREGSET as a legacy alias.

The Linux kernel header linux/elf.h defines NT_PRFPREG with a value of 2.

This is the same as the userspace NT_FPREGSET which also has a value of 2.

For all intents and purposes the two macros mean the same thing but have
different macro names.

For example:

x86 uses the note value to write out the core file...

linux/arch/x86/kernel/ptrace.c
~~~
...
        [REGSET_FP] = {
                .core_note_type = NT_PRFPREG,
                .n = sizeof(struct user_i387_struct) / sizeof(long),
                .size = sizeof(long), .align = sizeof(long),
                .active = xfpregs_active, .get = xfpregs_get, .set =
xfpregs_set
        },
...
~~~

... and the target independent portions of gdb process it into a section
    for the debugger to inspect.

gdb/bfd/elf.c
~~~
...
    case NT_FPREGSET:           /* FIXME: rename to NT_PRFPREG */
      return elfcore_grok_prfpreg (abfd, note);
...
~~~

Note: gdb actually has it's own copies of the NT_* values in
include/elf/common.h.

The following patch adds an alias to the user distributed header file elf.h. 

Similar changes have been sent to the binutils list here:
http://sourceware.org/ml/binutils/2012-11/msg00417.html

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.