Move [PAC] into a new MI field addr_flags

Add a new print_pc which prints both the PC and a new field addr_flags.
Call this wherever the PC is printed in stack.c.

Add a new gdbarch method get_pc_address_flags to obtain the addr_flag
contents. By default returns an empty string, on AArch64 this returns
PAC if the address has been masked in the frame.

Document this in the manual and NEWS file.

gdb/ChangeLog:

	* NEWS (Other MI changes): New subsection.
	* aarch64-tdep.c (aarch64_get_pc_address_flags): New function.
	(aarch64_gdbarch_init): Add aarch64_get_pc_address_flags.
	* arch-utils.c (default_get_pc_address_flags): New function.
	* arch-utils.h (default_get_pc_address_flags): New declaration.
	* gdbarch.sh: Add get_pc_address_flags.
	* gdbarch.c: Regenerate.
	* gdbarch.h: Likewise.
	* stack.c (print_pc): New function.
	(print_frame_info) (print_frame): Call print_pc.

gdb/doc/ChangeLog:

	* gdb.texinfo (AArch64 Pointer Authentication)
	(GDB/MI Breakpoint Information) (Frame Information): Document
	addr_field.

1 files changed, 3 insertions, 0 deletions

diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index 2f9fbbc56cd..d589b2c49a0 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -1210,6 +1210,9 @@ v;const disasm_options_and_args_t *;valid_disassembler_options;;;0;0;;0;host_add
 # default rules as laid out in gdbtypes.c:type_align.
 m;ULONGEST;type_align;struct type *type;type;;default_type_align;;0
 
+# Return a string containing any flags for the given PC in the given FRAME.
+f;std::string;get_pc_address_flags;frame_info *frame, CORE_ADDR pc;frame, pc;;default_get_pc_address_flags;;0
+
 EOF
 }