--- /dev/null
+/* S/390-specific support for ELF.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+
+ This file is part of BFD, the Binary File Descriptor library.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
+
+/* Used to pass info between ld and bfd. */
+struct s390_elf_params
+{
+ /* Tell the kernel to allocate 4k page tables. */
+ int pgste;
+};
+
+bfd_boolean bfd_elf_s390_set_options (struct bfd_link_info *info,
+ struct s390_elf_params *params);
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/s390.h"
+#include "elf-s390.h"
#include <stdarg.h>
/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
/* Small local sym cache. */
struct sym_cache sym_cache;
+
+ /* Options passed from the linker. */
+ struct s390_elf_params *params;
};
/* Get the s390 ELF linker hash table from a link_info structure. */
return elf_s390_merge_obj_attributes (ibfd, info);
}
+/* We may add a PT_S390_PGSTE program header. */
+
+static int
+elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ struct elf_s390_link_hash_table *htab;
+
+ htab = elf_s390_hash_table (info);
+ return htab->params->pgste;
+}
+
+
+/* Add the PT_S390_PGSTE program header. */
+
+static bfd_boolean
+elf_s390_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ struct elf_s390_link_hash_table *htab;
+ struct elf_segment_map *m, *pm = NULL;
+
+ htab = elf_s390_hash_table (info);
+ if (!htab->params->pgste)
+ return TRUE;
+
+ /* If there is already a PT_S390_PGSTE header, avoid adding
+ another. */
+ m = elf_seg_map (abfd);
+ while (m && m->p_type != PT_S390_PGSTE)
+ {
+ pm = m;
+ m = m->next;
+ }
+
+ if (m)
+ return TRUE;
+
+ m = (struct elf_segment_map *)
+ bfd_zalloc (abfd, sizeof (struct elf_segment_map));
+ if (m == NULL)
+ return FALSE;
+ m->p_type = PT_S390_PGSTE;
+ m->count = 0;
+ m->next = NULL;
+ if (pm)
+ pm->next = m;
+
+ return TRUE;
+}
+
+bfd_boolean
+bfd_elf_s390_set_options (struct bfd_link_info *info,
+ struct s390_elf_params *params)
+{
+ struct elf_s390_link_hash_table *htab;
+
+ htab = elf_s390_hash_table (info);
+ htab->params = params;
+
+ 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. */
#define elf_backend_plt_sym_val elf_s390_plt_sym_val
#define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
+#define elf_backend_additional_program_headers elf_s390_additional_program_headers
+#define elf_backend_modify_segment_map elf_s390_modify_segment_map
#define bfd_elf64_mkobject elf_s390_mkobject
#define elf_backend_object_p elf_s390_object_p
}
}
+static const char *
+get_s390_segment_type (unsigned long type)
+{
+ switch (type)
+ {
+ case PT_S390_PGSTE: return "S390_PGSTE";
+ default: return NULL;
+ }
+}
+
static const char *
get_mips_segment_type (unsigned long type)
{
case EM_TI_C6000:
result = get_tic6x_segment_type (p_type);
break;
+ case EM_S390:
+ case EM_S390_OLD:
+ result = get_s390_segment_type (p_type);
+ break;
default:
result = NULL;
break;
// Platform architecture compatibility information
PT_AARCH64_ARCHEXT = 0x70000000,
// Exception unwind tables
- PT_AARCH64_UNWIND = 0x70000001
+ PT_AARCH64_UNWIND = 0x70000001,
+ // 4k page table size
+ PT_S390_PGSTE = 0x70000000,
};
// The valid bit flags found in the Phdr p_flags field.
#define EF_S390_HIGH_GPRS 0x00000001
+/* Request 4k page table size. */
+#define PT_S390_PGSTE (PT_LOPROC + 0)
+
/* Relocation types. */
START_RELOC_NUMBERS (elf_s390_reloc_type)
$(srcdir)/scripttempl/ia64vms.sc ${GEN_DEPENDS}
eelf64_s390.c: $(srcdir)/emulparams/elf64_s390.sh \
+ $(srcdir)/emultempl/s390.em \
$(ELF_DEPS) $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
eelf64_sparc.c: $(srcdir)/emulparams/elf64_sparc.sh \
GENERATE_SHLIB_SCRIPT=yes
GENERATE_PIE_SCRIPT=yes
NO_SMALL_DATA=yes
+EXTRA_EM_FILE=s390
IREL_IN_PLT=
# Treat a host that matches the target with the possible exception of "x"
--- /dev/null
+# This shell script emits a C file. -*- C -*-
+# Copyright (C) 2017 Free Software Foundation, Inc.
+#
+# This file is part of the GNU Binutils.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the license, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING3. If not,
+# see <http://www.gnu.org/licenses/>.
+#
+
+# This file is sourced from elf-generic.em, and defines S/390
+# specific routines.
+#
+fragment <<EOF
+
+#include "ldctor.h"
+#include "elf-s390.h"
+
+static struct s390_elf_params params = { 0 };
+
+/* This is a convenient point to tell BFD about target specific flags.
+ After the output has been created, but before inputs are read. */
+static void
+s390_elf_create_output_section_statements (void)
+{
+ if (!bfd_elf_s390_set_options (&link_info, ¶ms))
+ einfo ("%F%P: can not init BFD: %E\n");
+}
+
+EOF
+
+# Define some shell vars to insert bits of code into the standard elf
+# parse_args and list_options functions.
+#
+PARSE_AND_LIST_PROLOGUE='
+#define OPTION_PGSTE 301
+'
+
+PARSE_AND_LIST_LONGOPTS='
+ { "s390-pgste", no_argument, NULL, OPTION_PGSTE},
+'
+
+PARSE_AND_LIST_OPTIONS='
+ fprintf (file, _(" --s390-pgste Tell the kernel to "
+ "allocate 4k page tables\n"));
+'
+
+PARSE_AND_LIST_ARGS_CASES='
+ case OPTION_PGSTE:
+ params.pgste = 1;
+ break;
+'
+
+LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=s390_elf_create_output_section_statements
@set POWERPC
@set POWERPC64
@set Renesas
+@set S/390
@set SPU
@set TICOFF
@set WIN32
@set POWERPC
@set POWERPC64
@set Renesas
+@set S/390
@set SPU
@set TICOFF
@set WIN32
@ifset POWERPC64
* PowerPC64 ELF64:: ld and PowerPC64 64-bit ELF Support
@end ifset
+@ifset S/390
+* S/390 ELF:: ld and S/390 ELF Support
+@end ifset
@ifset SPU
* SPU ELF:: ld and SPU ELF Support
@end ifset
@ifset POWERPC64
* PowerPC64 ELF64:: @command{ld} and PowerPC64 64-bit ELF Support
@end ifset
+@ifset S/390
+* S/390 ELF:: @command{ld} and S/390 ELF Support
+@end ifset
@ifset SPU
* SPU ELF:: @command{ld} and SPU ELF Support
@end ifset
@end ifclear
@end ifset
+@ifset S/390
+@ifclear GENERIC
+@raisesections
+@end ifclear
+
+@node S/390 ELF
+@section @command{ld} and S/390 ELF Support
+
+@cindex S/390 ELF options
+@table @option
+
+@cindex S/390
+@kindex --s390-pgste
+@item --s390-pgste
+This option marks the result file with a @code{PT_S390_PGSTE}
+segment. The Linux kernel is supposed to allocate 4k page tables for
+binaries marked that way.
+@end table
+
+@ifclear GENERIC
+@lowersections
+@end ifclear
+@end ifset
+
@ifset SPU
@ifclear GENERIC
@raisesections
projects / binutils-gdb.git / commitdiff