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binutils/binutils-2.23.2-arm-add-flo...

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commit cd49363b8ae1725522ea29ccc0dda7b138f3d5aa
Author: Nick Clifton <nickc@redhat.com>
Date: Tue Oct 30 12:44:53 2012 +0000
bfd:
* elf32-arm.c (elf32_arm_print_private_bfd_data): Recognise and
display the new ARM hard-float/soft-float ABI flags for EABI_VER5
(elf32_arm_post_process_headers): Add the hard-float/soft-float
ABI flag as appropriate for ET_DYN/ET_EXEC in EABI_VER5.
binutils:
* readelf.c (decode_ARM_machine_flags): Recognise and display the
new ARM hard-float/soft-float ABI flags for EABI_VER5. Split out
the code for EABI_VER4 and EABI_VER5 to allow this.
elfcpp:
* arm.h: New enum for EABI soft- and hard-float flags.
gold:
* gold.cc (Target_arm::do_adjust_elf_header): Add the
hard-float/soft-float ABI flag as appropriate for ET_DYN/ET_EXEC
in EABI_VER5.
include:
* elf/arm.h (EF_ARM_ABI_FLOAT_SOFT): New define.
(EF_ARM_ABI_FLOAT_HARD): Likewise.
ld/testsuite:
* ld-arm/eabi-hard-float.s: New test source.
* ld-arm/eabi-soft-float.s: New test source.
* ld-arm/eabi-hard-float.d: New test.
* ld-arm/eabi-soft-float.d: New test.
* ld-arm/eabi-soft-float-ABI4.d: New test.
* ld-arm/eabi-soft-float-r.d: New test.
* ld-arm/arm-elf.xp: Use the new tests.
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -12110,6 +12110,15 @@ elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
case EF_ARM_EABI_VER5:
fprintf (file, _(" [Version5 EABI]"));
+
+ if (flags & EF_ARM_ABI_FLOAT_SOFT)
+ fprintf (file, _(" [soft-float ABI]"));
+
+ if (flags & EF_ARM_ABI_FLOAT_HARD)
+ fprintf (file, _(" [hard-float ABI]"));
+
+ flags &= ~(EF_ARM_ABI_FLOAT_SOFT | EF_ARM_ABI_FLOAT_HARD);
+
eabi:
if (flags & EF_ARM_BE8)
fprintf (file, _(" [BE8]"));
@@ -14417,6 +14426,16 @@ elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATT
if (globals != NULL && globals->byteswap_code)
i_ehdrp->e_flags |= EF_ARM_BE8;
}
+
+ if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_VER5
+ && ((i_ehdrp->e_type == ET_DYN) || (i_ehdrp->e_type == ET_EXEC)))
+ {
+ int abi = bfd_elf_get_obj_attr_int (abfd, OBJ_ATTR_PROC, Tag_ABI_VFP_args);
+ if (abi)
+ i_ehdrp->e_flags |= EF_ARM_ABI_FLOAT_HARD;
+ else
+ i_ehdrp->e_flags |= EF_ARM_ABI_FLOAT_SOFT;
+ }
}
static enum elf_reloc_type_class
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -2122,11 +2134,34 @@ decode_ARM_machine_flags (unsigned e_flags, char buf[])
case EF_ARM_EABI_VER4:
strcat (buf, ", Version4 EABI");
- goto eabi;
+ while (e_flags)
+ {
+ unsigned flag;
+
+ /* Process flags one bit at a time. */
+ flag = e_flags & - e_flags;
+ e_flags &= ~ flag;
+
+ switch (flag)
+ {
+ case EF_ARM_BE8:
+ strcat (buf, ", BE8");
+ break;
+
+ case EF_ARM_LE8:
+ strcat (buf, ", LE8");
+ break;
+
+ default:
+ unknown = 1;
+ break;
+ }
+ break;
+ }
+ break;
case EF_ARM_EABI_VER5:
strcat (buf, ", Version5 EABI");
- eabi:
while (e_flags)
{
unsigned flag;
@@ -2145,6 +2180,14 @@ decode_ARM_machine_flags (unsigned e_flags, char buf[])
strcat (buf, ", LE8");
break;
+ case EF_ARM_ABI_FLOAT_SOFT: /* Conflicts with EF_ARM_SOFT_FLOAT. */
+ strcat (buf, ", soft-float ABI");
+ break;
+
+ case EF_ARM_ABI_FLOAT_HARD: /* Conflicts with EF_ARM_VFP_FLOAT. */
+ strcat (buf, ", hard-float ABI");
+ break;
+
default:
unknown = 1;
break;
diff --git a/elfcpp/arm.h b/elfcpp/arm.h
index cb85eeb..ab0618a 100644
--- a/elfcpp/arm.h
+++ b/elfcpp/arm.h
@@ -1,6 +1,6 @@
// arm.h -- ELF definitions specific to EM_ARM -*- C++ -*-
-// Copyright 2009, Free Software Foundation, Inc.
+// Copyright 2009, 2012 Free Software Foundation, Inc.
// Written by Doug Kwan <dougkwan@google.com>.
// This file is part of elfcpp.
@@ -222,6 +222,14 @@ inline Elf_Word
arm_eabi_version(Elf_Word flags)
{ return flags & EF_ARM_EABIMASK; }
+// EABI_VER5 e_flags values for identifying soft- and hard-float ABI
+// choice.
+enum
+{
+ EF_ARM_ABI_FLOAT_SOFT = 0x200,
+ EF_ARM_ABI_FLOAT_HARD = 0x400,
+};
+
// Values for the Tag_CPU_arch EABI attribute.
enum
{
diff --git a/gold/arm.cc b/gold/arm.cc
index d847126..5770c8a 100644
--- a/gold/arm.cc
+++ b/gold/arm.cc
@@ -2476,7 +2476,7 @@ class Target_arm : public Sized_target<32, big_endian>
{ return new Arm_output_section<big_endian>(name, type, flags); }
void
- do_adjust_elf_header(unsigned char* view, int len) const;
+ do_adjust_elf_header(unsigned char* view, int len);
// We only need to generate stubs, and hence perform relaxation if we are
// not doing relocatable linking.
@@ -10016,15 +10016,16 @@ template<bool big_endian>
void
Target_arm<big_endian>::do_adjust_elf_header(
unsigned char* view,
- int len) const
+ int len)
{
gold_assert(len == elfcpp::Elf_sizes<32>::ehdr_size);
elfcpp::Ehdr<32, big_endian> ehdr(view);
+ elfcpp::Elf_Word flags = this->processor_specific_flags();
unsigned char e_ident[elfcpp::EI_NIDENT];
memcpy(e_ident, ehdr.get_e_ident(), elfcpp::EI_NIDENT);
- if (elfcpp::arm_eabi_version(this->processor_specific_flags())
+ if (elfcpp::arm_eabi_version(flags)
== elfcpp::EF_ARM_EABI_UNKNOWN)
e_ident[elfcpp::EI_OSABI] = elfcpp::ELFOSABI_ARM;
else
@@ -10033,6 +10034,21 @@ Target_arm<big_endian>::do_adjust_elf_header(
// FIXME: Do EF_ARM_BE8 adjustment.
+ // If we're working in EABI_VER5, set the hard/soft float ABI flags
+ // as appropriate.
+ if (elfcpp::arm_eabi_version(flags) == elfcpp::EF_ARM_EABI_VER5)
+ {
+ elfcpp::Elf_Half type = ehdr.get_e_type();
+ if (type == elfcpp::ET_EXEC || type == elfcpp::ET_DYN)
+ {
+ Object_attribute* attr = this->get_aeabi_object_attribute(elfcpp::Tag_ABI_VFP_args);
+ if (attr->int_value())
+ flags |= elfcpp::EF_ARM_ABI_FLOAT_HARD;
+ else
+ flags |= elfcpp::EF_ARM_ABI_FLOAT_SOFT;
+ this->set_processor_specific_flags(flags);
+ }
+ }
elfcpp::Ehdr_write<32, big_endian> oehdr(view);
oehdr.put_e_ident(e_ident);
}
diff --git a/include/elf/arm.h b/include/elf/arm.h
index 8ea3fe8..d799303 100644
--- a/include/elf/arm.h
+++ b/include/elf/arm.h
@@ -46,6 +46,11 @@
#define EF_ARM_MAPSYMSFIRST 0x10 /* NB conflicts with EF_APCS_FLOAT. */
#define EF_ARM_EABIMASK 0xFF000000
+/* New constants defined in the ARM ELF spec. version XXX.
+ Only valid in conjunction with EF_ARM_EABI_VER5. */
+#define EF_ARM_ABI_FLOAT_SOFT 0x200 /* NB conflicts with EF_ARM_SOFT_FLOAT. */
+#define EF_ARM_ABI_FLOAT_HARD 0x400 /* NB conflicts with EF_ARM_VFP_FLOAT. */
+
/* Constants defined in AAELF. */
#define EF_ARM_BE8 0x00800000
#define EF_ARM_LE8 0x00400000
diff --git a/ld/testsuite/ld-arm/arm-elf.exp b/ld/testsuite/ld-arm/arm-elf.exp
index 8e15ffe..81ee0bd 100644
--- a/ld/testsuite/ld-arm/arm-elf.exp
+++ b/ld/testsuite/ld-arm/arm-elf.exp
@@ -271,6 +271,21 @@ set armelftests_common {
{"Simple non-PIC shared library (no PLT check)" "-shared" "" {arm-lib.s}
{{objdump -Rw arm-lib.r}}
"arm-lib.so"}
+ {"EABI soft-float ET_EXEC ABI flag" "-T arm.ld" "-mfloat-abi=soft -meabi=5" {eabi-soft-float.s}
+ {{readelf -h eabi-soft-float.d}}
+ "eabi-soft-float"}
+ {"EABI hard-float ET_EXEC ABI flag" "-T arm.ld" "-mfloat-abi=hard -meabi=5" {eabi-hard-float.s}
+ {{readelf -h eabi-hard-float.d}}
+ "eabi-hard-float"}
+ {"EABI hard-float ET_DYN ABI flag" "-shared" "-mfloat-abi=hard -meabi=5" {eabi-hard-float.s}
+ {{readelf -h eabi-hard-float.d}}
+ "eabi-hard-float.so"}
+ {"EABI ABI flags wrong ABI version" "-T arm.ld" "-mfloat-abi=soft -meabi=4" {eabi-soft-float.s}
+ {{readelf -h eabi-soft-float-ABI4.d}}
+ "eabi-soft-float-no-flags"}
+ {"EABI ABI flags ld -r" "-r" "-mfloat-abi=soft -meabi=5" {eabi-soft-float.s}
+ {{readelf -h eabi-soft-float-r.d}}
+ "eabi-soft-float-r.o"}
}
set armelftests_nonacl {
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