checkstack.pl: port to AArch64

AArch64 stores the frame pointer and return pointer, and decrements the
stack. Also remove my (no longer valid) email address.

Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index c05d586..d54a114 100755 (executable)
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -13,7 +13,7 @@
 #      Random bits by Matt Mackall <mpm@selenic.com>
 #      M68k port by Geert Uytterhoeven and Andreas Schwab
 #      AVR32 port by Haavard Skinnemoen (Atmel)
-#      PARISC port by Kyle McMartin <kyle@parisc-linux.org>
+#      AArch64, PARISC ports by Kyle McMartin
 #      sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
 #
 #      Usage:
@@ -45,7 +45,10 @@ my (@stack, $re, $dre, $x, $xs, $funcre);
        $x      = "[0-9a-f]";   # hex character
        $xs     = "[0-9a-f ]";  # hex character or space
        $funcre = qr/^$x* <(.*)>:$/;
-       if ($arch eq 'arm') {
+       if ($arch eq 'aarch64') {
+               #ffffffc0006325cc:       a9bb7bfd        stp     x29, x30, [sp,#-80]!
+               $re = qr/^.*stp.*sp,\#-([0-9]{1,8})\]\!/o;
+       } elsif ($arch eq 'arm') {
                #c0008ffc:      e24dd064        sub     sp, sp, #100    ; 0x64
                $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
        } elsif ($arch eq 'avr32') {