PATCH [1/4] arm: Add Tag_PAC_extension build attribute

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

	* elf32-arm.c (elf32_arm_merge_eabi_attributes): Add
	'Tag_PAC_extension' 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_PAC_extension' enum.

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

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

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

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

diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index a9119c497805e5bf2e54e8fa1fee81694326e2b1..bb4ba89357e357be7ed9fc8fa62c1dbb72591e8e 100644 (file)
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -14612,6 +14612,7 @@ elf32_arm_merge_eabi_attributes (bfd *ibfd, struct bfd_link_info *info)
        case Tag_T2EE_use:
        case Tag_MPextension_use:
        case Tag_MVE_arch:
+       case Tag_PAC_extension:
          /* 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 bedd3893b59b937a9501ed7ccb27620258a5604a..d38a07f0fa583cc1b139ef8543ac77628075229a 100644 (file)
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -16139,6 +16139,11 @@ static const char *const arm_attr_tag_MPextension_use_legacy[] =
 static const char *const arm_attr_tag_MVE_arch[] =
   {"No MVE", "MVE Integer only", "MVE Integer and FP"};
 
+static const char * arm_attr_tag_PAC_extension[] =
+  {"No PAC/AUT instructions",
+   "PAC/AUT instructions permitted in the NOP space",
+   "PAC/AUT instructions permitted in the NOP and in the non-NOP space"};
+
 #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[] =
@@ -16179,6 +16184,7 @@ static arm_attr_public_tag arm_attr_public_tags[] =
   LOOKUP(44, DIV_use),
   LOOKUP(46, DSP_extension),
   LOOKUP(48, MVE_arch),
+  LOOKUP(50, PAC_extension),
   {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 1d3102ff7487964878087d5b6ee1cad4fbe975ed..ce682a5bdc62fd6268acfbfe7371aaa7c1d9a03f 100644 (file)
--- a/elfcpp/arm.h
+++ b/elfcpp/arm.h
@@ -306,6 +306,7 @@ enum
   Tag_undefined43 = 43,
   Tag_DIV_use = 44,
   Tag_MVE_arch = 48,
+  Tag_PAC_extension = 50,
   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 21a2e2d3053e8da9d2d7363d915bf3678e6b5177..2827e2949c3e103fd42f3ce50824f79d04e1fea1 100644 (file)
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -33516,6 +33516,7 @@ arm_convert_symbolic_attribute (const char *name)
       T (Tag_Virtualization_use),
       T (Tag_DSP_extension),
       T (Tag_MVE_arch),
+      T (Tag_PAC_extension),
       /* We deliberately do not include Tag_MPextension_use_legacy.  */
 #undef T
     };

diff --git a/include/elf/arm.h b/include/elf/arm.h
index 5b6e403dd28993f71ee5b8928d8155e45579cffc..27b676860dd685da746a35d83ab5752afc361a0b 100644 (file)
--- a/include/elf/arm.h
+++ b/include/elf/arm.h
@@ -327,6 +327,7 @@ enum
   Tag_DIV_use,
   Tag_DSP_extension = 46,
   Tag_MVE_arch = 48,
+  Tag_PAC_extension = 50,
   Tag_nodefaults = 64,
   Tag_also_compatible_with,
   Tag_T2EE_use,