Update libvpx snapshot to v0.9.7-p1 (Cayuga).

source/libvpx/build/make/ads2gas.pl

Index: source/libvpx/build/make/ads2gas.pl
===================================================================
--- source/libvpx/build/make/ads2gas.pl	(revision 96967)
+++ source/libvpx/build/make/ads2gas.pl	(working copy)
@@ -21,8 +21,14 @@
 print "@  using the ads2gas.pl script.\n";
 print "\t.equ DO1STROUNDING, 0\n";
 
+# Stack of procedure names.
+@proc_stack = ();
+
 while (<STDIN>)
 {
+    # Load and store alignment
+    s/@/,:/g;
+
     # Comment character
     s/;/@/g;
 
@@ -79,7 +85,10 @@
     s/CODE([0-9][0-9])/.code $1/;
 
     # No AREA required
-    s/^\s*AREA.*$/.text/;
+    # But ALIGNs in AREA must be obeyed
+    s/^\s*AREA.*ALIGN=([0-9])$/.text\n.p2align $1/;
+    # If no ALIGN, strip the AREA and align to 4 bytes
+    s/^\s*AREA.*$/.text\n.p2align 2/;
 
     # DCD to .word
     # This one is for incoming symbols
@@ -114,8 +123,8 @@
     # put the colon at the end of the line in the macro
     s/^([a-zA-Z_0-9\$]+)/$1:/ if !/EQU/;
 
-    # Strip ALIGN
-    s/\sALIGN/@ ALIGN/g;
+    # ALIGN directive
+    s/ALIGN/.balign/g;
 
     # Strip ARM
     s/\sARM/@ ARM/g;
@@ -127,9 +136,23 @@
     # Strip PRESERVE8
     s/\sPRESERVE8/@ PRESERVE8/g;
 
-    # Strip PROC and ENDPROC
-    s/\sPROC/@/g;
-    s/\sENDP/@/g;
+    # Use PROC and ENDP to give the symbols a .size directive.
+    # This makes them show up properly in debugging tools like gdb and valgrind.
+    if (/\bPROC\b/)
+    {
+        my $proc;
+        /^_([\.0-9A-Z_a-z]\w+)\b/;
+        $proc = $1;
+        push(@proc_stack, $proc) if ($proc);
+        s/\bPROC\b/@ $&/;
+    }
+    if (/\bENDP\b/)
+    {
+        my $proc;
+        s/\bENDP\b/@ $&/;
+        $proc = pop(@proc_stack);
+        $_ = "\t.size $proc, .-$proc".$_ if ($proc);
+    }
 
     # EQU directive
     s/(.*)EQU(.*)/.equ $1, $2/;
@@ -148,3 +171,6 @@
     next if /^\s*END\s*$/;
     print;
 }
+
+# Mark that this object doesn't need an executable stack.
+printf ("\t.section\t.note.GNU-stack,\"\",\%\%progbits\n");