From 02b83698ef04a33a8c606efeceb8fe7cd9a9b344 Mon Sep 17 00:00:00 2001
From: Jan Beulich <jbeulich@suse.com>
Date: Mon, 4 Jul 2022 08:32:20 +0200
Subject: [PATCH] x86: restore masking of displacement kinds

Commit 7d5e4556a375 rendered the check near the end of what is now
i386_finalize_displacement() entirely dead for AT&T mode, since for
operands involving a displacement .unspecified will always be set. But
the logic there is bogus anyway - Intel syntax operand size specifiers
are of no interest there either. The only thing which matters in the
"displacement only" determination is .baseindex.

Of course when masking displacement kinds we should not at the same time
also mask off other attributes.

Furthermore the type mask returned by lex_got() also needs to be
adjusted: The only case where we want Disp32 (rather than Disp32S) is
when dealing with 32-bit addressing mode in 64-bit code.
---
 gas/config/tc-i386.c | 31 +++++++++++++++----------------
 opcodes/i386-gen.c   | 12 ++++++------
 opcodes/i386-init.h  | 12 ++++++------
 3 files changed, 27 insertions(+), 28 deletions(-)

diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index 8b245cc4d34..4cb7f179f4a 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -10380,7 +10380,7 @@ lex_got (enum bfd_reloc_code_real *rel,
       OPERAND_TYPE_IMM64, true },
     { STRING_COMMA_LEN ("PLT"),      { BFD_RELOC_386_PLT32,
 				       BFD_RELOC_X86_64_PLT32    },
-      OPERAND_TYPE_IMM32_32S_DISP32, false },
+      OPERAND_TYPE_IMM32_32S_DISP32S, false },
     { STRING_COMMA_LEN ("GOTPLT"),   { _dummy_first_bfd_reloc_code_real,
 				       BFD_RELOC_X86_64_GOTPLT64 },
       OPERAND_TYPE_IMM64_DISP64, true },
@@ -10389,28 +10389,28 @@ lex_got (enum bfd_reloc_code_real *rel,
       OPERAND_TYPE_IMM64_DISP64, true },
     { STRING_COMMA_LEN ("GOTPCREL"), { _dummy_first_bfd_reloc_code_real,
 				       BFD_RELOC_X86_64_GOTPCREL },
-      OPERAND_TYPE_IMM32_32S_DISP32, true },
+      OPERAND_TYPE_IMM32_32S_DISP32S, true },
     { STRING_COMMA_LEN ("TLSGD"),    { BFD_RELOC_386_TLS_GD,
 				       BFD_RELOC_X86_64_TLSGD    },
-      OPERAND_TYPE_IMM32_32S_DISP32, true },
+      OPERAND_TYPE_IMM32_32S_DISP32S, true },
     { STRING_COMMA_LEN ("TLSLDM"),   { BFD_RELOC_386_TLS_LDM,
 				       _dummy_first_bfd_reloc_code_real },
       OPERAND_TYPE_NONE, true },
     { STRING_COMMA_LEN ("TLSLD"),    { _dummy_first_bfd_reloc_code_real,
 				       BFD_RELOC_X86_64_TLSLD    },
-      OPERAND_TYPE_IMM32_32S_DISP32, true },
+      OPERAND_TYPE_IMM32_32S_DISP32S, true },
     { STRING_COMMA_LEN ("GOTTPOFF"), { BFD_RELOC_386_TLS_IE_32,
 				       BFD_RELOC_X86_64_GOTTPOFF },
-      OPERAND_TYPE_IMM32_32S_DISP32, true },
+      OPERAND_TYPE_IMM32_32S_DISP32S, true },
     { STRING_COMMA_LEN ("TPOFF"),    { BFD_RELOC_386_TLS_LE_32,
 				       BFD_RELOC_X86_64_TPOFF32  },
-      OPERAND_TYPE_IMM32_32S_64_DISP32_64, true },
+      OPERAND_TYPE_IMM32_32S_64_DISP32S_64, true },
     { STRING_COMMA_LEN ("NTPOFF"),   { BFD_RELOC_386_TLS_LE,
 				       _dummy_first_bfd_reloc_code_real },
       OPERAND_TYPE_NONE, true },
     { STRING_COMMA_LEN ("DTPOFF"),   { BFD_RELOC_386_TLS_LDO_32,
 				       BFD_RELOC_X86_64_DTPOFF32 },
-      OPERAND_TYPE_IMM32_32S_64_DISP32_64, true },
+      OPERAND_TYPE_IMM32_32S_64_DISP32S_64, true },
     { STRING_COMMA_LEN ("GOTNTPOFF"),{ BFD_RELOC_386_TLS_GOTIE,
 				       _dummy_first_bfd_reloc_code_real },
       OPERAND_TYPE_NONE, true },
@@ -10419,17 +10419,17 @@ lex_got (enum bfd_reloc_code_real *rel,
       OPERAND_TYPE_NONE, true },
     { STRING_COMMA_LEN ("GOT"),      { BFD_RELOC_386_GOT32,
 				       BFD_RELOC_X86_64_GOT32    },
-      OPERAND_TYPE_IMM32_32S_64_DISP32, true },
+      OPERAND_TYPE_IMM32_32S_64_DISP32S, true },
     { STRING_COMMA_LEN ("TLSDESC"),  { BFD_RELOC_386_TLS_GOTDESC,
 				       BFD_RELOC_X86_64_GOTPC32_TLSDESC },
-      OPERAND_TYPE_IMM32_32S_DISP32, true },
+      OPERAND_TYPE_IMM32_32S_DISP32S, true },
     { STRING_COMMA_LEN ("TLSCALL"),  { BFD_RELOC_386_TLS_DESC_CALL,
 				       BFD_RELOC_X86_64_TLSDESC_CALL },
-      OPERAND_TYPE_IMM32_32S_DISP32, true },
+      OPERAND_TYPE_IMM32_32S_DISP32S, true },
 #else /* TE_PE */
     { STRING_COMMA_LEN ("SECREL32"), { BFD_RELOC_32_SECREL,
 				       BFD_RELOC_32_SECREL },
-      OPERAND_TYPE_IMM32_32S_64_DISP32_64, false },
+      OPERAND_TYPE_IMM32_32S_64_DISP32S_64, false },
 #endif
   };
   char *cp;
@@ -11143,7 +11143,6 @@ static int
 i386_finalize_displacement (segT exp_seg ATTRIBUTE_UNUSED, expressionS *exp,
 			    i386_operand_type types, const char *disp_start)
 {
-  i386_operand_type bigdisp;
   int ret = 1;
 
   /* We do this to make sure that the section symbol is in
@@ -11208,10 +11207,10 @@ i386_finalize_displacement (segT exp_seg ATTRIBUTE_UNUSED, expressionS *exp,
     i.types[this_operand].bitfield.disp8 = 1;
 
   /* Check if this is a displacement only operand.  */
-  bigdisp = operand_type_and_not (i.types[this_operand], anydisp);
-  if (operand_type_all_zero (&bigdisp))
-    i.types[this_operand] = operand_type_and (i.types[this_operand],
-					      types);
+  if (!i.types[this_operand].bitfield.baseindex)
+    i.types[this_operand] =
+      operand_type_or (operand_type_and_not (i.types[this_operand], anydisp),
+		       operand_type_and (i.types[this_operand], types));
 
   return ret;
 }
diff --git a/opcodes/i386-gen.c b/opcodes/i386-gen.c
index d18a7d27545..1fe59e6cc14 100644
--- a/opcodes/i386-gen.c
+++ b/opcodes/i386-gen.c
@@ -529,14 +529,14 @@ static initializer operand_type_init[] =
     "Imm16|Imm32|Imm32S" },
   { "OPERAND_TYPE_IMM32_64",
     "Imm32|Imm64" },
-  { "OPERAND_TYPE_IMM32_32S_DISP32",
-    "Imm32|Imm32S|Disp32" },
+  { "OPERAND_TYPE_IMM32_32S_DISP32S",
+    "Imm32|Imm32S|Disp32S" },
   { "OPERAND_TYPE_IMM64_DISP64",
     "Imm64|Disp64" },
-  { "OPERAND_TYPE_IMM32_32S_64_DISP32",
-    "Imm32|Imm32S|Imm64|Disp32" },
-  { "OPERAND_TYPE_IMM32_32S_64_DISP32_64",
-    "Imm32|Imm32S|Imm64|Disp32|Disp64" },
+  { "OPERAND_TYPE_IMM32_32S_64_DISP32S",
+    "Imm32|Imm32S|Imm64|Disp32S" },
+  { "OPERAND_TYPE_IMM32_32S_64_DISP32S_64",
+    "Imm32|Imm32S|Imm64|Disp32S|Disp64" },
   { "OPERAND_TYPE_ANYIMM",
     "Imm1|Imm8|Imm8S|Imm16|Imm32|Imm32S|Imm64" },
 };
diff --git a/opcodes/i386-init.h b/opcodes/i386-init.h
index df2f7bcd498..84ed54e2d14 100644
--- a/opcodes/i386-init.h
+++ b/opcodes/i386-init.h
@@ -1964,20 +1964,20 @@
   { { 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
       0, 0, 0, 0, 0, 0, 0 } }
 
-#define OPERAND_TYPE_IMM32_32S_DISP32 \
-  { { 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, \
+#define OPERAND_TYPE_IMM32_32S_DISP32S \
+  { { 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, \
       0, 0, 0, 0, 0, 0, 0 } }
 
 #define OPERAND_TYPE_IMM64_DISP64 \
   { { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, \
       0, 0, 0, 0, 0, 0, 0 } }
 
-#define OPERAND_TYPE_IMM32_32S_64_DISP32 \
-  { { 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, \
+#define OPERAND_TYPE_IMM32_32S_64_DISP32S \
+  { { 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, \
       0, 0, 0, 0, 0, 0, 0 } }
 
-#define OPERAND_TYPE_IMM32_32S_64_DISP32_64 \
-  { { 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, \
+#define OPERAND_TYPE_IMM32_32S_64_DISP32S_64 \
+  { { 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, \
       0, 0, 0, 0, 0, 0, 0 } }
 
 #define OPERAND_TYPE_ANYIMM \
-- 
2.30.2