PATCH [4/4] arm: Add Tag_PACRET_use build attribute

bfd/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* elf32-arm.c (elf32_arm_merge_eabi_attributes): Add
	'Tag_PACRET_use' case.

binutils/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* readelf.c (arm_attr_tag_PAC_extension): Declare.
	(arm_attr_public_tags): Add 'PAC_extension' lookup.

elfcpp/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* arm.h: Define 'Tag_PACRET_use' enum.

gas/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* config/tc-arm.c (arm_convert_symbolic_attribute): Add
	'Tag_PACRET_use' to the attribute_table.

include/
2021-07-06  Andrea Corallo  <andrea.corallo@arm.com>

	* elf/arm.h (elf_arm_reloc_type): Add 'Tag_PACRET_use'.

diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index 98f9240..2cb8768 100644 (file)
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -14615,6 +14615,7 @@ elf32_arm_merge_eabi_attributes (bfd *ibfd, struct bfd_link_info *info)
        case Tag_PAC_extension:
        case Tag_BTI_extension:
        case Tag_BTI_use:
+       case Tag_PACRET_use:
          /* Use the largest value specified.  */
          if (in_attr[i].i > out_attr[i].i)
            out_attr[i].i = in_attr[i].i;

diff --git a/binutils/readelf.c b/binutils/readelf.c
index 5893be3..582c9dc 100644 (file)
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -16153,6 +16153,10 @@ static const char * arm_attr_tag_BTI_use[] =
   {"Compiled without branch target enforcement",
    "Compiled with branch target enforcement"};
 
+static const char * arm_attr_tag_PACRET_use[] =
+  {"Compiled without return address signing and authentication",
+   "Compiled with return address signing and authentication"};
+
 #define LOOKUP(id, name) \
   {id, #name, 0x80 | ARRAY_SIZE(arm_attr_tag_##name), arm_attr_tag_##name}
 static arm_attr_public_tag arm_attr_public_tags[] =
@@ -16196,6 +16200,7 @@ static arm_attr_public_tag arm_attr_public_tags[] =
   LOOKUP(50, PAC_extension),
   LOOKUP(52, BTI_extension),
   LOOKUP(74, BTI_use),
+  LOOKUP(76, PACRET_use),
   {64, "nodefaults", 0, NULL},
   {65, "also_compatible_with", 0, NULL},
   LOOKUP(66, T2EE_use),

diff --git a/elfcpp/arm.h b/elfcpp/arm.h
index 12ba3fa..db549a8 100644 (file)
--- a/elfcpp/arm.h
+++ b/elfcpp/arm.h
@@ -309,6 +309,7 @@ enum
   Tag_PAC_extension = 50,
   Tag_BTI_extension = 52,
   Tag_BTI_use = 74,
+  Tag_PACRET_use = 76,
   Tag_nodefaults = 64,
   Tag_also_compatible_with = 65,
   Tag_T2EE_use = 66,

diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index 8a0fe8b..d288d8d 100644 (file)
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -33519,6 +33519,7 @@ arm_convert_symbolic_attribute (const char *name)
       T (Tag_PAC_extension),
       T (Tag_BTI_extension),
       T (Tag_BTI_use),
+      T (Tag_PACRET_use),
       /* We deliberately do not include Tag_MPextension_use_legacy.  */
 #undef T
     };

diff --git a/include/elf/arm.h b/include/elf/arm.h
index 0f6e734..299f394 100644 (file)
--- a/include/elf/arm.h
+++ b/include/elf/arm.h
@@ -330,6 +330,7 @@ enum
   Tag_PAC_extension = 50,
   Tag_BTI_extension = 52,
   Tag_BTI_use = 74,
+  Tag_PACRET_use = 76,
   Tag_nodefaults = 64,
   Tag_also_compatible_with,
   Tag_T2EE_use,