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binutils/0005-S-390-z13-use-GNU-attribute-to-indicate-vector-ABI.patch

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From d77ae458893b48e4e4ad5aa74a94023dff4ec4e1 Mon Sep 17 00:00:00 2001
From: Andreas Krebbel <krebbel@linux.vnet.ibm.com>
Date: Mon, 27 Apr 2015 10:32:23 +0200
Subject: [PATCH 5/5] S/390: z13 use GNU attribute to indicate vector ABI
bfd/
* elf-s390-common.c (elf_s390_merge_obj_attributes): New function.
* elf32-s390.c (elf32_s390_merge_private_bfd_data): Call
elf_s390_merge_obj_attributes.
* elf64-s390.c (elf64_s390_merge_private_bfd_data): New function.
binutils/
* readelf.c (display_s390_gnu_attribute): New function.
(process_s390_specific): New function.
(process_arch_specific): Call process_s390_specific.
gas/
* doc/as.texinfo: Document Tag_GNU_S390_ABI_Vector.
include/elf/
* s390.h: Define Tag_GNU_S390_ABI_Vector.
# Conflicts:
# bfd/ChangeLog
# binutils/ChangeLog
# gas/testsuite/ChangeLog
# include/elf/ChangeLog
# Conflicts:
# bfd/elf-s390-common.c
---
bfd/elf-s390-common.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++
bfd/elf32-s390.c | 9 ++++++++
bfd/elf64-s390.c | 18 +++++++++++++++-
binutils/readelf.c | 46 ++++++++++++++++++++++++++++++++++++++++
gas/doc/as.texinfo | 16 ++++++++++++++
include/elf/s390.h | 15 +++++++++++--
6 files changed, 159 insertions(+), 3 deletions(-)
Index: binutils-2.25.0/bfd/elf-s390-common.c
===================================================================
--- binutils-2.25.0.orig/bfd/elf-s390-common.c 2015-07-09 16:44:50.000000000 +0200
+++ binutils-2.25.0/bfd/elf-s390-common.c 2015-07-09 16:44:51.000000000 +0200
@@ -254,3 +254,61 @@ elf_s390_elf_sort_relocs_p (asection *se
{
return (sec->flags & SEC_CODE) == 0;
}
+
+/* Merge object attributes from IBFD into OBFD. Raise an error if
+ there are conflicting attributes. */
+static bfd_boolean
+elf_s390_merge_obj_attributes (bfd *ibfd, bfd *obfd)
+{
+ obj_attribute *in_attr, *in_attrs;
+ obj_attribute *out_attr, *out_attrs;
+
+ if (!elf_known_obj_attributes_proc (obfd)[0].i)
+ {
+ /* This is the first object. Copy the attributes. */
+ _bfd_elf_copy_obj_attributes (ibfd, obfd);
+
+ /* Use the Tag_null value to indicate the attributes have been
+ initialized. */
+ elf_known_obj_attributes_proc (obfd)[0].i = 1;
+
+ return TRUE;
+ }
+
+ in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
+ out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
+
+ /* Check for conflicting Tag_GNU_S390_ABI_Vector attributes and
+ merge non-conflicting ones. */
+ in_attr = &in_attrs[Tag_GNU_S390_ABI_Vector];
+ out_attr = &out_attrs[Tag_GNU_S390_ABI_Vector];
+
+ if (in_attr->i > 2)
+ _bfd_error_handler
+ (_("Warning: %B uses unknown vector ABI %d"), ibfd,
+ in_attr->i);
+ else if (out_attr->i > 2)
+ _bfd_error_handler
+ (_("Warning: %B uses unknown vector ABI %d"), obfd,
+ out_attr->i);
+ else if (in_attr->i != out_attr->i)
+ {
+ out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
+
+ if (in_attr->i && out_attr->i)
+ {
+ const char abi_str[3][9] = { "none", "software", "hardware" };
+
+ _bfd_error_handler
+ (_("Warning: %B uses vector %s ABI, %B uses %s ABI"),
+ ibfd, obfd, abi_str[in_attr->i], abi_str[out_attr->i]);
+ }
+ if (in_attr->i > out_attr->i)
+ out_attr->i = in_attr->i;
+ }
+
+ /* Merge Tag_compatibility attributes and any common GNU ones. */
+ _bfd_elf_merge_object_attributes (ibfd, obfd);
+
+ return TRUE;
+}
Index: binutils-2.25.0/bfd/elf32-s390.c
===================================================================
--- binutils-2.25.0.orig/bfd/elf32-s390.c 2015-07-09 16:44:50.000000000 +0200
+++ binutils-2.25.0/bfd/elf32-s390.c 2015-07-09 16:44:51.000000000 +0200
@@ -4001,9 +4001,18 @@ elf_s390_plt_sym_val (bfd_vma i, const a
return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
}
+/* Merge backend specific data from an object file to the output
+ object file when linking. */
+
static bfd_boolean
elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
{
+ if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
+ return TRUE;
+
+ if (!elf_s390_merge_obj_attributes (ibfd, obfd))
+ return FALSE;
+
elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
return TRUE;
}
Index: binutils-2.25.0/bfd/elf64-s390.c
===================================================================
--- binutils-2.25.0.orig/bfd/elf64-s390.c 2015-07-09 16:44:50.000000000 +0200
+++ binutils-2.25.0/bfd/elf64-s390.c 2015-07-09 16:44:51.000000000 +0200
@@ -3766,6 +3766,21 @@ elf_s390_plt_sym_val (bfd_vma i, const a
return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
}
+/* Merge backend specific data from an object file to the output
+ object file when linking. */
+
+static bfd_boolean
+elf64_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
+{
+ if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
+ return TRUE;
+
+ if (!elf_s390_merge_obj_attributes (ibfd, obfd))
+ return FALSE;
+
+ return TRUE;
+}
+
/* Why was the hash table entry size definition changed from
ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
this is the only reason for the s390_elf64_size_info structure. */
@@ -3824,7 +3839,8 @@ const struct elf_size_info s390_elf64_si
#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
-#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
+#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
+#define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
#define elf_backend_check_relocs elf_s390_check_relocs
Index: binutils-2.25.0/binutils/readelf.c
===================================================================
--- binutils-2.25.0.orig/binutils/readelf.c 2015-07-09 16:44:50.000000000 +0200
+++ binutils-2.25.0/binutils/readelf.c 2015-07-09 16:44:51.000000000 +0200
@@ -12462,6 +12462,41 @@ display_power_gnu_attribute (unsigned ch
return display_tag_value (tag & 1, p, end);
}
+static unsigned char *
+display_s390_gnu_attribute (unsigned char * p,
+ int tag,
+ const unsigned char * const end)
+{
+ unsigned int len;
+ int val;
+
+ if (tag == Tag_GNU_S390_ABI_Vector)
+ {
+ val = read_uleb128 (p, &len, end);
+ p += len;
+ printf (" Tag_GNU_S390_ABI_Vector: ");
+
+ switch (val)
+ {
+ case 0:
+ printf (_("any\n"));
+ break;
+ case 1:
+ printf (_("software\n"));
+ break;
+ case 2:
+ printf (_("hardware\n"));
+ break;
+ default:
+ printf ("??? (%d)\n", val);
+ break;
+ }
+ return p;
+ }
+
+ return display_tag_value (tag & 1, p, end);
+}
+
static void
display_sparc_hwcaps (int mask)
{
@@ -13233,6 +13268,13 @@ process_power_specific (FILE * file)
}
static int
+process_s390_specific (FILE * file)
+{
+ return process_attributes (file, NULL, SHT_GNU_ATTRIBUTES, NULL,
+ display_s390_gnu_attribute);
+}
+
+static int
process_sparc_specific (FILE * file)
{
return process_attributes (file, NULL, SHT_GNU_ATTRIBUTES, NULL,
@@ -15046,6 +15088,10 @@ process_arch_specific (FILE * file)
case EM_PPC:
return process_power_specific (file);
break;
+ case EM_S390:
+ case EM_S390_OLD:
+ return process_s390_specific (file);
+ break;
case EM_SPARC:
case EM_SPARC32PLUS:
case EM_SPARCV9:
Index: binutils-2.25.0/gas/doc/as.texinfo
===================================================================
--- binutils-2.25.0.orig/gas/doc/as.texinfo 2015-07-09 16:44:51.000000000 +0200
+++ binutils-2.25.0/gas/doc/as.texinfo 2015-07-09 16:44:51.000000000 +0200
@@ -7086,6 +7086,22 @@ The vector ABI used by this object file.
@end itemize
@end table
+@subsection IBM z Systems Attributes
+
+@table @r
+@item Tag_GNU_S390_ABI_Vector (8)
+The vector ABI used by this object file. The value will be:
+
+@itemize @bullet
+@item
+0 for files not affected by the vector ABI.
+@item
+1 for files using software vector ABI.
+@item
+2 for files using hardware vector ABI.
+@end itemize
+@end table
+
@node Defining New Object Attributes
@section Defining New Object Attributes
Index: binutils-2.25.0/include/elf/s390.h
===================================================================
--- binutils-2.25.0.orig/include/elf/s390.h 2015-01-15 09:57:57.000000000 +0100
+++ binutils-2.25.0/include/elf/s390.h 2015-07-09 16:44:51.000000000 +0200
@@ -129,6 +129,17 @@ START_RELOC_NUMBERS (elf_s390_reloc_type
RELOC_NUMBER (R_390_GNU_VTENTRY, 251)
END_RELOC_NUMBERS (R_390_max)
-#endif /* _ELF_390_H */
+/* Object attribute tags. */
+enum
+{
+ /* 0-3 are generic. */
+ /* 4 is reserved for the FP ABI. */
+ /* Vector ABI:
+ 0 = not affected by the vector ABI, or not tagged.
+ 1 = software vector ABI being used
+ 2 = hardware vector ABI being used. */
+ Tag_GNU_S390_ABI_Vector = 8,
+};
+#endif /* _ELF_390_H */
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