Add testcases for POR_EL0 register access, POE pseudo-register access, SIGSEGV
diagnostics, fix-and-continue support (updating $por_el0 after SIGSEGV and
continuing with signal 0), core file support and the test for signal frame
unwinding support.
---
 gdb/testsuite/gdb.arch/aarch64-poe-core.exp   | 101 ++++++++++++++++++
 gdb/testsuite/gdb.arch/aarch64-poe-sigframe.c |  45 ++++++++
 .../gdb.arch/aarch64-poe-sigframe.exp         |  55 ++++++++++
 gdb/testsuite/gdb.arch/aarch64-poe-sigsegv.c  |  52 +++++++++
 .../gdb.arch/aarch64-poe-sigsegv.exp          |  55 ++++++++++
 gdb/testsuite/gdb.arch/aarch64-poe.c          |  29 +++++
 gdb/testsuite/gdb.arch/aarch64-poe.exp        |  60 +++++++++++
 gdb/testsuite/lib/gdb.exp                     |  55 ++++++++++
 8 files changed, 452 insertions(+)
 create mode 100644 gdb/testsuite/gdb.arch/aarch64-poe-core.exp
 create mode 100644 gdb/testsuite/gdb.arch/aarch64-poe-sigframe.c
 create mode 100644 gdb/testsuite/gdb.arch/aarch64-poe-sigframe.exp
 create mode 100644 gdb/testsuite/gdb.arch/aarch64-poe-sigsegv.c
 create mode 100644 gdb/testsuite/gdb.arch/aarch64-poe-sigsegv.exp
 create mode 100644 gdb/testsuite/gdb.arch/aarch64-poe.c
 create mode 100644 gdb/testsuite/gdb.arch/aarch64-poe.exp