diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 0fe164458e..482bf81e68 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,8 @@
+2020-05-28  Stephen Casner  <casner@acm.org>
+
+	* pdp11.c: Implement BRD_RELOC_32 to relocate the low 16 bits of
+	addreses in .long (used in testsuites) and .stab values.
+
 2020-05-27  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/22909
diff --git a/bfd/pdp11.c b/bfd/pdp11.c
index adcf34da1d..375fbedccf 100644
--- a/bfd/pdp11.c
+++ b/bfd/pdp11.c
@@ -255,6 +255,7 @@ reloc_howto_type howto_table_pdp11[] =
   /* type	       rs size bsz  pcrel bitpos ovrf			  sf name     part_inpl readmask  setmask    pcdone */
 HOWTO( 0,	       0,  1,  16,  FALSE, 0, complain_overflow_signed,0,"16",	TRUE, 0x0000ffff,0x0000ffff, FALSE),
 HOWTO( 1,	       0,  1,  16,  TRUE,  0, complain_overflow_signed,0,"DISP16",	TRUE, 0x0000ffff,0x0000ffff, FALSE),
+HOWTO( 2,	       0,  2,  32,  FALSE, 0, complain_overflow_signed,0,"32",	TRUE, 0x0000ffff,0x0000ffff, FALSE),
 };
 
 #define TABLE_SIZE(TABLE)	(sizeof(TABLE)/sizeof(TABLE[0]))
@@ -276,6 +277,8 @@ NAME (aout, reloc_type_lookup) (bfd * abfd ATTRIBUTE_UNUSED,
       return &howto_table_pdp11[0];
     case BFD_RELOC_16_PCREL:
       return &howto_table_pdp11[1];
+    case BFD_RELOC_32:
+      return &howto_table_pdp11[2];
     default:
       return NULL;
     }
diff --git a/gas/ChangeLog b/gas/ChangeLog
index 2f719e7c8c..07509cc737 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,16 @@
+2020-05-28  Stephen Casner  <casner@acm.org>
+
+	Fix unexpected failures in gas testsuite for pdp11-aout target.
+	These are caused by the PDP11's mix of little-endian octets in
+	shorts but shorts in big endian order for long or quad.
+
+	* config/tc-pdp11.c (md_number_to_chars): Implement .quad
+	* testsuite/gas/all/gas.exp: Select alternate test scripts for
+	pdp11, skip octa test completely.
+	* testsuite/gas/all/eqv-dot-pdp11.s: Identical to eqv-dot.s
+	* testsuite/gas/all/eqv-dot-pdp11.d: Match different octet order.
+	* testsuite/gas/all/cond-pdp11.l: Match different octet order.
+
 2020-05-28  Alex Coplan  <alex.coplan@arm.com>
 
 	* frags.c (frag_grow): Fix comment.
diff --git a/gas/config/tc-pdp11.c b/gas/config/tc-pdp11.c
index 57daa0f509..7de42aea95 100644
--- a/gas/config/tc-pdp11.c
+++ b/gas/config/tc-pdp11.c
@@ -222,6 +222,16 @@ md_number_to_chars (char con[], valueT value, int nbytes)
       con[2] =  value        & 0xff;
       con[3] = (value >>  8) & 0xff;
       break;
+    case 8:
+      con[0] = (value >> 48) & 0xff;
+      con[1] = (value >> 56) & 0xff;
+      con[2] = (value >> 32) & 0xff;
+      con[3] = (value >> 40) & 0xff;
+      con[4] = (value >> 16) & 0xff;
+      con[5] = (value >> 24) & 0xff;
+      con[6] =  value        & 0xff;
+      con[7] = (value >>  8) & 0xff;
+      break;
     default:
       BAD_CASE (nbytes);
     }
diff --git a/gas/testsuite/gas/all/cond-pdp11.l b/gas/testsuite/gas/all/cond-pdp11.l
new file mode 100644
index 0000000000..d722a0cc66
--- /dev/null
+++ b/gas/testsuite/gas/all/cond-pdp11.l
@@ -0,0 +1,74 @@
+# This should match the output of gas -alc cond.s.
+
+.*cond.s.*
+
+
+   1[ 	]+.if	0
+   8[ 	]+.else
+   9[ 	]+.if	1
+  10[ 	]+.endc
+  11 0000 00 ?00 ?02 ?00[ 	]+.long[ 	]+2
+  12[ 	]+.if	0
+  14[ 	]+.else
+  15 0004 00 ?00 ?04 ?00[ 	]+.long[ 	]+4
+  16[ 	]+.endc
+  17[ 	]+.endc
+  18[ 	]+
+  19[ 	]+.if	0
+  21[ 	]+.elseif	1
+  22[ 	]+.if	0
+  24[ 	]+.elseif	1
+  25 0008 00 ?00 ?07 ?00[ 	]+.long[ 	]+7
+  26[ 	]+.endif
+  27[ 	]+.elseif	1
+  29[ 	]+.else
+  31[ 	]+.endif
+[ 	]*[1-9][0-9]*[ 	]+
+[ 	]*[1-9][0-9]*[ 	]+\.comm[ 	]+v_c,[ 	]*1[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.ifndef[ 	]+v_c[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.endif[ 	]*
+[ 	]*[1-9][0-9]*[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.if[ 	]+x[ 	]*<>[ 	]*x[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.endif[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.equiv[ 	]+y,[ 	]*x[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.ifndef[ 	]+y[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.endif[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.if[ 	]+x[ 	]*<>[ 	]*y[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.endif[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.equiv[ 	]+z,[ 	]*x[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.if[ 	]+y[ 	]*<>[ 	]*z[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.endif[ 	]*
+[ 	]*[1-9][0-9]*[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.equiv[ 	]+v_a,[ 	]*y[ 	]*\+[ 	]*1[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.equiv[ 	]+v_b,[ 	]*z[ 	]*-[ 	]*1[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.if[ 	]+v_a[ 	]*==[ 	]*x[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.endif[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.if[ 	]+v_a[ 	]*-[ 	]*1[ 	]*<>[ 	]*x[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.endif[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.if[ 	]+v_a[ 	]*<>[ 	]*v_b[ 	]*\+[ 	]*2[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.endif[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.if[ 	]+v_a[ 	]*-[ 	]*v_b[ 	]*<>[ 	]*2[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.endif[ 	]*
+[ 	]*[1-9][0-9]*[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.equiv[ 	]+x,[ 	]*0[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.if[ 	]+y[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.elseif[ 	]+y[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.endif[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+
+[ 	]*[1-9][0-9]*[ 	]+\.macro[ 	]+m[ 	]+x,[ 	]*y[ 	]*
+#...
+[ 	]*[1-9][0-9]*[ 	]+\.endm[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+[0-9a-f]+[048c] FF ?FF ?FF ?FF[ 	]+m[ 	]+,[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+FF ?FF ?FF ?FF[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+[0-9a-f]+[048c] FF ?FF ?FF ?FF[ 	]+m[ 	]+,[ 	]*10[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+00 ?00 ?0A ?00[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+[0-9a-f]+[048c] 00 ?00 ?0B ?00[ 	]+m[ 	]+11,[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+FF ?FF ?FF ?FF[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+[0-9a-f]+[048c] 00 ?00 ?0C ?00[ 	]+m[ 	]+12,[ 	]*13[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+00 ?00 ?0D ?00[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+
+[ 	]*[1-9][0-9]*[ 	]+\.if[ 	]+0[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+\.endif[ 	]*
+[ 	]*[1-9][0-9]*[ 	]+
+[ 	]*[1-9][0-9]*[ 	]+.*\.p2align 5,0
+#pass
diff --git a/gas/testsuite/gas/all/eqv-dot-pdp11.d b/gas/testsuite/gas/all/eqv-dot-pdp11.d
new file mode 100644
index 0000000000..0e2ddcdbcf
--- /dev/null
+++ b/gas/testsuite/gas/all/eqv-dot-pdp11.d
@@ -0,0 +1,12 @@
+#objdump: -s -j .data
+#name: eqv involving dot (PDP11)
+# Special for PDP11 which is little-endian for octets in shorts
+# but big-endian for shorts in longs per register assignments for
+# mul/div and in by convention in memory (at least for Unix).
+
+.*: .*
+
+Contents of section \.data:
+ 0000 0+0000 0+0100 0+0200 0+0c00  .*
+ 0010 0+1000 140+ 0+1000 1c0+  .*
+#pass
diff --git a/gas/testsuite/gas/all/eqv-dot-pdp11.s b/gas/testsuite/gas/all/eqv-dot-pdp11.s
new file mode 100644
index 0000000000..cd8cb9198b
--- /dev/null
+++ b/gas/testsuite/gas/all/eqv-dot-pdp11.s
@@ -0,0 +1,8 @@
+	.data
+x:	.long 0, 1, 2, . - x
+ y = . - x
+ z == . - x
+	.long y
+	.long z
+	.long y
+	.long z
diff --git a/gas/testsuite/gas/all/gas.exp b/gas/testsuite/gas/all/gas.exp
index 1664018c0f..c782955370 100644
--- a/gas/testsuite/gas/all/gas.exp
+++ b/gas/testsuite/gas/all/gas.exp
@@ -91,7 +91,11 @@ switch -glob $target_triplet {
 
 gas_test "eqv-ok.s" "" "" ".eqv support"
 gas_test_error "eqv-bad.s" "" ".eqv for symbol already set"
-run_dump_test eqv-dot
+if { [istarget "pdp11-*-*"] } then {
+    run_dump_test eqv-dot-pdp11
+} else {
+    run_dump_test eqv-dot
+}
 
 if { ![istarget "bfin-*-*"] } then {
     gas_test "assign-ok.s" "" "" "== assignment support"
@@ -326,12 +330,17 @@ proc test_cond {} {
     global subdir
 
     set testname "conditional listings"
+    if { [istarget "pdp11-*-*"] } then {
+	set listing "cond-pdp11.l"
+    } else {
+	set listing "cond.l"
+    }
     gas_run cond.s "-alc" ">dump.out"
     if ![string match "" $comp_output] {
 	send_log "$comp_output\n"
 	fail $testname
     } else {
-	if { [regexp_diff dump.out $srcdir/$subdir/cond.l] } {
+	if { [regexp_diff dump.out $srcdir/$subdir/$listing] } {
 	    fail $testname
 	} else {
 	    pass $testname
@@ -392,7 +401,11 @@ if { ![istarget "powerpc*-*-*"] && ![istarget "rs6000*-*-*"] && ![istarget "s390
 }
 
 run_dump_test quad
-run_dump_test octa
+
+# poor little PDP-11 can't handle 16-byte values
+if { ![istarget "pdp11-*-*"] } {
+    run_dump_test octa
+}
 
 # .set works differently on some targets.
 switch -glob $target_triplet {