[Bug libc/21548] New: [mips] get/set/make/swap context for MIPS O32 assume wrong size for general purpose registers in mcontext_t structure

["gordana.cmiljanovic at imgtec dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=21548

            Bug ID: 21548
           Summary: [mips] get/set/make/swap context for MIPS O32 assume
                    wrong size for general purpose registers in mcontext_t
                    structure
           Product: glibc
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: gordana.cmiljanovic at imgtec dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

General purpose registers in mcontext_t structure
are 8 bytes long for both MIPS32/MIPS64, as per:
https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/mips/sys/ucontext.h;h=f766dacd205f49a479f17b19df476a8103f55a2e;hb=refs/heads/master#l35
and
https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/mips/sys/ucontext.h;h=f766dacd205f49a479f17b19df476a8103f55a2e;hb=refs/heads/master#l68

but get/set/make/swap context implementations for MIPS O32
incorrectly assume that general purpose registers
in this structure are 4 bytes long.

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