# This shell script emits a C file. -*- C -*-
-# Copyright 2003, 2005 Free Software Foundation, Inc.
+# Copyright (C) 2003-2021 Free Software Foundation, Inc.
#
-# This file is part of GLD, the Gnu Linker.
+# 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 2 of the License, or
+# 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,
#
# 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.
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
#
-# This file is sourced from elf32.em, and defines extra powerpc32-elf
+# This file is sourced from elf.em, and defines extra powerpc32-elf
# specific routines.
#
-cat >>e${EMULATION_NAME}.c <<EOF
+fragment <<EOF
-#include "libbfd.h"
#include "elf32-ppc.h"
+#include "ldlex.h"
+#include "ldlang.h"
-extern const bfd_target bfd_elf32_powerpc_vec;
-extern const bfd_target bfd_elf32_powerpcle_vec;
+#define is_ppc_elf(bfd) \
+ (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
+ && elf_object_id (bfd) == PPC32_ELF_DATA)
/* Whether to run tls optimization. */
static int notlsopt = 0;
-/* Chooses the correct place for .plt and .got. */
-static int old_plt = 0;
+/* Whether to convert inline PLT calls to direct. */
+static int no_inline_opt = 0;
+
+/* Choose the correct place for .got. */
static int old_got = 0;
+static struct ppc_elf_params params = { PLT_UNSET, 0, -1,
+ 0, 0, 0, 0, 0, 0, 0 };
+
+static void
+ppc_after_open_output (void)
+{
+ if (params.emit_stub_syms < 0)
+ params.emit_stub_syms = (link_info.emitrelocations
+ || bfd_link_pic (&link_info));
+ if (params.pagesize == 0)
+ params.pagesize = link_info.commonpagesize;
+ ppc_elf_link_params (&link_info, ¶ms);
+}
+
+EOF
+
+# No --secure-plt, --bss-plt, or --sdata-got for vxworks.
+if test -z "$VXWORKS_BASE_EM_FILE" ; then
+ fragment <<EOF
static void
-ppc_after_open (void)
+ppc_after_check_relocs (void)
{
- if (link_info.hash->creator == &bfd_elf32_powerpc_vec
- || link_info.hash->creator == &bfd_elf32_powerpcle_vec)
+ if (is_ppc_elf (link_info.output_bfd))
{
int new_plt;
int keep_new;
lang_output_section_statement_type *plt_os[2];
lang_output_section_statement_type *got_os[2];
- new_plt = ppc_elf_select_plt_layout (output_bfd, &link_info, old_plt);
+ new_plt = ppc_elf_select_plt_layout (link_info.output_bfd, &link_info);
if (new_plt < 0)
- einfo ("%X%P: select_plt_layout problem %E\n");
+ einfo (_("%X%P: select_plt_layout problem %E\n"));
num_got = 0;
num_plt = 0;
- for (os = &lang_output_section_statement.head->output_section_statement;
+ for (os = (void *) lang_os_list.head;
os != NULL;
os = os->next)
{
}
}
- gld${EMULATION_NAME}_after_open ();
+ after_check_relocs_default ();
+}
+
+EOF
+fi
+fragment <<EOF
+static void
+prelim_size_sections (void)
+{
+ if (expld.phase != lang_mark_phase_enum)
+ {
+ expld.phase = lang_mark_phase_enum;
+ expld.dataseg.phase = exp_seg_none;
+ one_lang_size_sections_pass (NULL, FALSE);
+ /* We must not cache anything from the preliminary sizing. */
+ lang_reset_memory_regions ();
+ }
}
static void
ppc_before_allocation (void)
{
- if (link_info.hash->creator == &bfd_elf32_powerpc_vec
- || link_info.hash->creator == &bfd_elf32_powerpcle_vec)
+ if (is_ppc_elf (link_info.output_bfd))
{
- if (ppc_elf_tls_setup (output_bfd, &link_info) && !notlsopt)
+ if (!no_inline_opt
+ && !bfd_link_relocatable (&link_info))
+ {
+ prelim_size_sections ();
+
+ if (!ppc_elf_inline_plt (&link_info))
+ einfo (_("%X%P: inline PLT: %E\n"));
+ }
+
+ if (ppc_elf_tls_setup (link_info.output_bfd, &link_info)
+ && !notlsopt)
{
- if (!ppc_elf_tls_optimize (output_bfd, &link_info))
+ if (!ppc_elf_tls_optimize (link_info.output_bfd, &link_info))
{
- einfo ("%X%P: TLS problem %E\n");
+ einfo (_("%X%P: TLS problem %E\n"));
return;
}
}
}
+
gld${EMULATION_NAME}_before_allocation ();
+
+ ppc_elf_maybe_strip_sdata_syms (&link_info);
+
+ if (RELAXATION_ENABLED)
+ params.branch_trampolines = 1;
+
+ /* Turn on relaxation if executable sections have addresses that
+ might make branches overflow. */
+ else if (!RELAXATION_DISABLED_BY_USER)
+ {
+ bfd_vma low = (bfd_vma) -1;
+ bfd_vma high = 0;
+ asection *o;
+
+ /* Run lang_size_sections even if already done, so as to pick
+ up gld${EMULATION_NAME}_before_allocation sizing. This
+ matters when we have an executable bss plt which will
+ typically be laid out near the end of the image, ie. worst
+ case for branches at the start of .text. */
+ expld.phase = lang_first_phase_enum;
+ prelim_size_sections ();
+
+ for (o = link_info.output_bfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & (SEC_ALLOC | SEC_CODE)) != (SEC_ALLOC | SEC_CODE))
+ continue;
+ if (o->rawsize == 0)
+ continue;
+ if (low > o->vma)
+ low = o->vma;
+ if (high < o->vma + o->rawsize - 1)
+ high = o->vma + o->rawsize - 1;
+ }
+ if (high > low && high - low > (1 << 25) - 1)
+ params.branch_trampolines = 1;
+ }
+
+ if (params.branch_trampolines
+ || params.ppc476_workaround
+ || params.pic_fixup > 0)
+ ENABLE_RELAXATION;
}
+/* Replaces default zero fill padding in executable sections with
+ "ba 0" instructions. This works around the ppc476 icache bug if we
+ have a function pointer tail call near the end of a page, some
+ small amount of padding, then the function called at the beginning
+ of the next page. If the "ba 0" is ever executed we should hit a
+ segv, so it's almost as good as an illegal instruction (zero). */
+
static void
-gld${EMULATION_NAME}_after_allocation (void)
+no_zero_padding (lang_statement_union_type *l)
{
- if (link_info.hash->creator == &bfd_elf32_powerpc_vec
- || link_info.hash->creator == &bfd_elf32_powerpcle_vec)
+ if (l->header.type == lang_padding_statement_enum
+ && l->padding_statement.size != 0
+ && l->padding_statement.output_section != NULL
+ && (l->padding_statement.output_section->flags & SEC_CODE) != 0
+ && l->padding_statement.fill->size == 0)
{
- if (!ppc_elf_set_sdata_syms (output_bfd, &link_info))
- einfo ("%X%P: cannot set sdata syms %E\n");
+ struct _ppc_fill_type
+ {
+ size_t size;
+ unsigned char data[4];
+ };
+ static struct _ppc_fill_type fill_be = { 4, {0x48, 0, 0, 2} };
+ static struct _ppc_fill_type fill_le = { 4, {2, 0, 0, 0x48} };
+
+ if (bfd_big_endian (link_info.output_bfd))
+ l->padding_statement.fill = (struct _fill_type *) &fill_be;
+ else
+ l->padding_statement.fill = (struct _fill_type *) &fill_le;
}
}
+static void
+ppc_finish (void)
+{
+ if (params.ppc476_workaround)
+ lang_for_each_statement (no_zero_padding);
+ if (!ppc_finish_symbols (&link_info))
+ einfo (_("%X%P: ppc_finish_symbols problem %E\n"));
+ finish_default ();
+}
+
EOF
+if grep -q 'ld_elf32_spu_emulation' ldemul-list.h; then
+ fragment <<EOF
+/* Special handling for embedded SPU executables. */
+extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *);
+
+static bfd_boolean
+ppc_recognized_file (lang_input_statement_type *entry)
+{
+ if (embedded_spu_file (entry, "-m32"))
+ return TRUE;
+
+ return ldelf_load_symbols (entry);
+}
+
+EOF
+LDEMUL_RECOGNIZED_FILE=ppc_recognized_file
+fi
+
# 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_NO_TLS_OPT 301
-#define OPTION_OLD_PLT 302
-#define OPTION_OLD_GOT 303
+PARSE_AND_LIST_PROLOGUE=${PARSE_AND_LIST_PROLOGUE}'
+enum ppc32_opt
+{
+ OPTION_NO_TLS_OPT = 321,
+ OPTION_NO_TLS_GET_ADDR_OPT,
+ OPTION_NEW_PLT,
+ OPTION_OLD_PLT,
+ OPTION_PLT_ALIGN,
+ OPTION_NO_PLT_ALIGN,
+ OPTION_NO_INLINE_OPT,
+ OPTION_OLD_GOT,
+ OPTION_STUBSYMS,
+ OPTION_NO_STUBSYMS,
+ OPTION_PPC476_WORKAROUND,
+ OPTION_NO_PPC476_WORKAROUND,
+ OPTION_NO_PICFIXUP,
+ OPTION_VLE_RELOC_FIXUP
+};
'
-PARSE_AND_LIST_LONGOPTS='
+PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}'
+ { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS },
+ { "no-emit-stub-syms", no_argument, NULL, OPTION_NO_STUBSYMS },
{ "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT },
+ { "no-tls-get-addr-optimize", no_argument, NULL, OPTION_NO_TLS_GET_ADDR_OPT },'
+if test -z "$VXWORKS_BASE_EM_FILE" ; then
+ PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}'
+ { "secure-plt", no_argument, NULL, OPTION_NEW_PLT },
{ "bss-plt", no_argument, NULL, OPTION_OLD_PLT },
- { "sdata-got", no_argument, NULL, OPTION_OLD_GOT },
+ { "plt-align", optional_argument, NULL, OPTION_PLT_ALIGN },
+ { "no-plt-align", no_argument, NULL, OPTION_NO_PLT_ALIGN },
+ { "no-inline-optimize", no_argument, NULL, OPTION_NO_INLINE_OPT },
+ { "sdata-got", no_argument, NULL, OPTION_OLD_GOT },'
+fi
+PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}'
+ { "ppc476-workaround", optional_argument, NULL, OPTION_PPC476_WORKAROUND },
+ { "no-ppc476-workaround", no_argument, NULL, OPTION_NO_PPC476_WORKAROUND },
+ { "no-pic-fixup", no_argument, NULL, OPTION_NO_PICFIXUP },
+ { "vle-reloc-fixup", no_argument, NULL, OPTION_VLE_RELOC_FIXUP },
'
-PARSE_AND_LIST_OPTIONS='
+PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}'
+ fprintf (file, _("\
+ --emit-stub-syms Label linker stubs with a symbol\n"
+ ));
+ fprintf (file, _("\
+ --no-emit-stub-syms Don'\''t label linker stubs with a symbol\n"
+ ));
fprintf (file, _("\
- --no-tls-optimize Don'\''t try to optimize TLS accesses.\n\
- --bss-plt Force old-style BSS PLT.\n\
- --sdata-got Force GOT location just before .sdata.\n"
+ --no-tls-optimize Don'\''t try to optimize TLS accesses\n"
+ ));
+ fprintf (file, _("\
+ --no-tls-get-addr-optimize Don'\''t use a special __tls_get_addr call\n"
+ ));'
+if test -z "$VXWORKS_BASE_EM_FILE" ; then
+ PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}'\
+ fprintf (file, _("\
+ --secure-plt Use new-style PLT if possible\n"
+ ));
+ fprintf (file, _("\
+ --bss-plt Force old-style BSS PLT\n"
+ ));
+ fprintf (file, _("\
+ --plt-align Align PLT call stubs to fit cache lines\n"
+ ));
+ fprintf (file, _("\
+ --no-plt-align Dont'\''t align individual PLT call stubs\n"
+ ));
+ fprintf (file, _("\
+ --no-inline-optimize Don'\''t convert inline PLT to direct calls\n"
+ ));
+ fprintf (file, _("\
+ --sdata-got Force GOT location just before .sdata\n"
+ ));'
+fi
+PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}'\
+ fprintf (file, _("\
+ --ppc476-workaround [=pagesize]\n\
+ Avoid a cache bug on ppc476\n"
+ ));
+ fprintf (file, _("\
+ --no-ppc476-workaround Disable workaround\n"
+ ));
+ fprintf (file, _("\
+ --no-pic-fixup Don'\''t edit non-pic to pic\n"
+ ));
+ fprintf (file, _("\
+ --vle-reloc-fixup Correct old object file 16A/16D relocation\n"
));
'
-PARSE_AND_LIST_ARGS_CASES='
+PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}'
+ case OPTION_STUBSYMS:
+ params.emit_stub_syms = 1;
+ break;
+
+ case OPTION_NO_STUBSYMS:
+ params.emit_stub_syms = 0;
+ break;
+
case OPTION_NO_TLS_OPT:
notlsopt = 1;
break;
+ case OPTION_NO_TLS_GET_ADDR_OPT:
+ params.no_tls_get_addr_opt = 1;
+ break;
+
+ case OPTION_NEW_PLT:
+ params.plt_style = PLT_NEW;
+ break;
+
case OPTION_OLD_PLT:
- old_plt = 1;
+ params.plt_style = PLT_OLD;
+ break;
+
+ case OPTION_PLT_ALIGN:
+ if (optarg != NULL)
+ {
+ char *end;
+ unsigned long val = strtoul (optarg, &end, 0);
+ if (*end || val > 5)
+ einfo (_("%F%P: invalid --plt-align `%s'\''\n"), optarg);
+ params.plt_stub_align = val;
+ }
+ else
+ params.plt_stub_align = 5;
+ break;
+
+ case OPTION_NO_PLT_ALIGN:
+ params.plt_stub_align = 0;
+ break;
+
+ case OPTION_NO_INLINE_OPT:
+ no_inline_opt = 1;
break;
case OPTION_OLD_GOT:
old_got = 1;
break;
+
+ case OPTION_TRADITIONAL_FORMAT:
+ notlsopt = 1;
+ params.no_tls_get_addr_opt = 1;
+ return FALSE;
+
+ case OPTION_PPC476_WORKAROUND:
+ params.ppc476_workaround = 1;
+ if (optarg != NULL)
+ {
+ char *end;
+ params.pagesize = strtoul (optarg, &end, 0);
+ if (*end
+ || (params.pagesize < 4096 && params.pagesize != 0)
+ || params.pagesize != (params.pagesize & -params.pagesize))
+ einfo (_("%F%P: invalid pagesize `%s'\''\n"), optarg);
+ }
+ break;
+
+ case OPTION_NO_PPC476_WORKAROUND:
+ params.ppc476_workaround = 0;
+ break;
+
+ case OPTION_NO_PICFIXUP:
+ params.pic_fixup = -1;
+ break;
+
+ case OPTION_VLE_RELOC_FIXUP:
+ params.vle_reloc_fixup = 1;
+ break;
'
# Put these extra ppc32elf routines in ld_${EMULATION_NAME}_emulation
#
-LDEMUL_AFTER_OPEN=ppc_after_open
+LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=ppc_after_open_output
+if test -z "$VXWORKS_BASE_EM_FILE" ; then
+ LDEMUL_AFTER_CHECK_RELOCS=ppc_after_check_relocs
+fi
LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation
-LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
+LDEMUL_FINISH=ppc_finish
projects / thirdparty / binutils-gdb.git / blobdiff