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PowerPC: downgrade FP mismatch error for shared libraries to a warning 

PR 25882
bfd/
	* elf32-ppc.c (_bfd_elf_ppc_merge_fp_attributes): Don't init FP
	attributes from shared libraries, and do not return an error if
	they don't match.
gold/
	* powerpc.cc (merge_object_attributes): Replace name param with
	obj param.  Update callers.  Don't init FP attributes from shared
	libraries, and do not emit an error if they don't match.
This commit is contained in:
Alan Modra 2020-05-22 11:42:43 +09:30
parent 1b2e4380eb
commit 6f3fe02b0b
4 changed files with 73 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
bfd/ChangeLog
View File

@ -1,3 +1,10 @@
2020-05-22 Alan Modra <amodra@gmail.com>
PR 25882
* elf32-ppc.c (_bfd_elf_ppc_merge_fp_attributes): Don't init FP
attributes from shared libraries, and do not return an error if
they don't match.
2020-05-21 Alan Modra <amodra@gmail.com>
PR 25993

45
bfd/elf32-ppc.c
View File

@ -3557,6 +3557,17 @@ _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
obj_attribute *in_attr, *in_attrs;
obj_attribute *out_attr, *out_attrs;
bfd_boolean ret = TRUE;
bfd_boolean warn_only;
/* We only warn about shared library mismatches, because common
libraries advertise support for a particular long double variant
but actually support more than one variant. For example, glibc
typically supports 128-bit IBM long double in the shared library
but has a compatibility static archive for 64-bit long double.
The linker doesn't have the smarts to see that an app using
object files marked as 64-bit long double call the compatibility
layer objects and only from there call into the shared library. */
warn_only = (ibfd->flags & DYNAMIC) != 0;
in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
@ -3574,9 +3585,12 @@ _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
;
else if (out_fp == 0)
{
out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
out_attr->i ^= in_fp;
last_fp = ibfd;
if (!warn_only)
{
out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
out_attr->i ^= in_fp;
last_fp = ibfd;
}
}
else if (out_fp != 2 && in_fp == 2)
{
@ -3584,7 +3598,7 @@ _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
/* xgettext:c-format */
(_("%pB uses hard float, %pB uses soft float"),
last_fp, ibfd);
ret = FALSE;
ret = warn_only;
}
else if (out_fp == 2 && in_fp != 2)
{
@ -3592,7 +3606,7 @@ _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
/* xgettext:c-format */
(_("%pB uses hard float, %pB uses soft float"),
ibfd, last_fp);
ret = FALSE;
ret = warn_only;
}
else if (out_fp == 1 && in_fp == 3)
{
@ -3600,7 +3614,7 @@ _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
/* xgettext:c-format */
(_("%pB uses double-precision hard float, "
"%pB uses single-precision hard float"), last_fp, ibfd);
ret = FALSE;
ret = warn_only;
}
else if (out_fp == 3 && in_fp == 1)
{
@ -3608,7 +3622,7 @@ _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
/* xgettext:c-format */
(_("%pB uses double-precision hard float, "
"%pB uses single-precision hard float"), ibfd, last_fp);
ret = FALSE;
ret = warn_only;
}
in_fp = in_attr->i & 0xc;
@ -3617,9 +3631,12 @@ _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
;
else if (out_fp == 0)
{
out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
out_attr->i ^= in_fp;
last_ld = ibfd;
if (!warn_only)
{
out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
out_attr->i ^= in_fp;
last_ld = ibfd;
}
}
else if (out_fp != 2 * 4 && in_fp == 2 * 4)
{
@ -3627,7 +3644,7 @@ _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
/* xgettext:c-format */
(_("%pB uses 64-bit long double, "
"%pB uses 128-bit long double"), ibfd, last_ld);
ret = FALSE;
ret = warn_only;
}
else if (in_fp != 2 * 4 && out_fp == 2 * 4)
{
@ -3635,7 +3652,7 @@ _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
/* xgettext:c-format */
(_("%pB uses 64-bit long double, "
"%pB uses 128-bit long double"), last_ld, ibfd);
ret = FALSE;
ret = warn_only;
}
else if (out_fp == 1 * 4 && in_fp == 3 * 4)
{
@ -3643,7 +3660,7 @@ _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
/* xgettext:c-format */
(_("%pB uses IBM long double, "
"%pB uses IEEE long double"), last_ld, ibfd);
ret = FALSE;
ret = warn_only;
}
else if (out_fp == 3 * 4 && in_fp == 1 * 4)
{
@ -3651,7 +3668,7 @@ _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
/* xgettext:c-format */
(_("%pB uses IBM long double, "
"%pB uses IEEE long double"), ibfd, last_ld);
ret = FALSE;
ret = warn_only;
}
}

7
gold/ChangeLog
View File

@ -1,3 +1,10 @@
2020-05-22 Alan Modra <amodra@gmail.com>
PR 25882
* powerpc.cc (merge_object_attributes): Replace name param with
obj param. Update callers. Don't init FP attributes from shared
libraries, and do not emit an error if they don't match.
2020-05-15 Nikita Ermakov <coffe92@gmail.com>
* powerpc.cc (do_gc_mark_symbol): Don't segfault on plugin symbols.

42
gold/powerpc.cc
View File

@ -1204,7 +1204,7 @@ class Target_powerpc : public Sized_target<size, big_endian>
// Merge object attributes from input object with those in the output.
void
merge_object_attributes(const char*, const Attributes_section_data*);
merge_object_attributes(const Object*, const Attributes_section_data*);
private:
@ -9481,7 +9481,7 @@ Target_powerpc<size, big_endian>::do_finalize_sections(
Powerpc_relobj<size, big_endian>* ppc_relobj
= static_cast<Powerpc_relobj<size, big_endian>*>(*p);
if (ppc_relobj->attributes_section_data())
this->merge_object_attributes(ppc_relobj->name().c_str(),
this->merge_object_attributes(ppc_relobj,
ppc_relobj->attributes_section_data());
}
for (Input_objects::Dynobj_iterator p = input_objects->dynobj_begin();
@ -9491,7 +9491,7 @@ Target_powerpc<size, big_endian>::do_finalize_sections(
Powerpc_dynobj<size, big_endian>* ppc_dynobj
= static_cast<Powerpc_dynobj<size, big_endian>*>(*p);
if (ppc_dynobj->attributes_section_data())
this->merge_object_attributes(ppc_dynobj->name().c_str(),
this->merge_object_attributes(ppc_dynobj,
ppc_dynobj->attributes_section_data());
}
@ -9514,7 +9514,7 @@ Target_powerpc<size, big_endian>::do_finalize_sections(
template<int size, bool big_endian>
void
Target_powerpc<size, big_endian>::merge_object_attributes(
const char* name,
const Object* obj,
const Attributes_section_data* pasd)
{
// Return if there is no attributes section data.
@ -9530,12 +9530,14 @@ Target_powerpc<size, big_endian>::merge_object_attributes(
Object_attribute* out_attr
= this->attributes_section_data_->known_attributes(vendor);
const char* name = obj->name().c_str();
const char* err;
const char* first;
const char* second;
int tag = elfcpp::Tag_GNU_Power_ABI_FP;
int in_fp = in_attr[tag].int_value() & 0xf;
int out_fp = out_attr[tag].int_value() & 0xf;
bool warn_only = obj->is_dynamic();
if (in_fp != out_fp)
{
err = NULL;
@ -9543,10 +9545,13 @@ Target_powerpc<size, big_endian>::merge_object_attributes(
;
else if ((out_fp & 3) == 0)
{
out_fp |= in_fp & 3;
out_attr[tag].set_int_value(out_fp);
out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL);
this->last_fp_ = name;
if (!warn_only)
{
out_fp |= in_fp & 3;
out_attr[tag].set_int_value(out_fp);
out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL);
this->last_fp_ = name;
}
}
else if ((out_fp & 3) != 2 && (in_fp & 3) == 2)
{
@ -9579,10 +9584,13 @@ Target_powerpc<size, big_endian>::merge_object_attributes(
;
else if ((out_fp & 0xc) == 0)
{
out_fp |= in_fp & 0xc;
out_attr[tag].set_int_value(out_fp);
out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL);
this->last_ld_ = name;
if (!warn_only)
{
out_fp |= in_fp & 0xc;
out_attr[tag].set_int_value(out_fp);
out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL);
this->last_ld_ = name;
}
}
else if ((out_fp & 0xc) != 2 * 4 && (in_fp & 0xc) == 2 * 4)
{
@ -9612,10 +9620,16 @@ Target_powerpc<size, big_endian>::merge_object_attributes(
if (err)
{
if (parameters->options().warn_mismatch())
gold_error(_(err), first, second);
{
if (warn_only)
gold_warning(_(err), first, second);
else
gold_error(_(err), first, second);
}
// Arrange for this attribute to be deleted. It's better to
// say "don't know" about a file than to wrongly claim compliance.
out_attr[tag].set_type(0);
if (!warn_only)
out_attr[tag].set_type(0);
}
}