# This shell script emits a C file. -*- C -*-
-# Copyright 2003, 2005, 2007, 2008, 2009, 2010, 2011, 2012
-# Free Software Foundation, Inc.
+# Copyright (C) 2003-2021 Free Software Foundation, Inc.
#
# This file is part of the GNU Binutils.
#
# 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.
#
fragment <<EOF
-#include "libbfd.h"
#include "elf32-ppc.h"
#include "ldlex.h"
+#include "ldlang.h"
#define is_ppc_elf(bfd) \
(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
/* Whether to run tls optimization. */
static int notlsopt = 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 bfd_vma pagesize = 0;
-
-static struct ppc_elf_params params = { PLT_UNSET, -1, 0, 0, 0, 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 || link_info.shared;
- if (pagesize == 0)
- pagesize = config.commonpagesize;
- params.pagesize_p2 = bfd_log2 (pagesize);
+ 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 "$VXWORKS_BASE_EM_FILE" ; then
+ fragment <<EOF
static void
-ppc_after_open (void)
+ppc_after_check_relocs (void)
{
if (is_ppc_elf (link_info.output_bfd))
{
new_plt = ppc_elf_select_plt_layout (link_info.output_bfd, &link_info);
if (new_plt < 0)
- einfo ("%X%P: select_plt_layout problem %E\n");
+ einfo (_("%X%P: select_plt_layout problem %E\n"));
num_got = 0;
num_plt = 0;
- for (os = &lang_output_section_statement.head->output_section_statement;
+ for (os = (void *) lang_os_list.head;
os != NULL;
os = os->next)
{
}
}
- gld${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
{
if (is_ppc_elf (link_info.output_bfd))
{
+ 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 (link_info.output_bfd, &link_info))
{
- einfo ("%X%P: TLS problem %E\n");
+ einfo (_("%X%P: TLS problem %E\n"));
return;
}
}
gld${EMULATION_NAME}_before_allocation ();
+ ppc_elf_maybe_strip_sdata_syms (&link_info);
+
if (RELAXATION_ENABLED)
params.branch_trampolines = 1;
bfd_vma high = 0;
asection *o;
- /* Run lang_size_sections (if not already done). */
- if (expld.phase != lang_mark_phase_enum)
- {
- expld.phase = lang_mark_phase_enum;
- expld.dataseg.phase = exp_dataseg_none;
- one_lang_size_sections_pass (NULL, FALSE);
- lang_reset_memory_regions ();
- }
+ /* Run lang_size_sections even if already done, so as to pick
+ up gld${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)
{
params.branch_trampolines = 1;
}
- if (params.ppc476_workaround || params.branch_trampolines)
+ 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
+no_zero_padding (lang_statement_union_type *l)
+{
+ 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)
+ {
+ 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 gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *);
static bfd_boolean
ppc_recognized_file (lang_input_statement_type *entry)
if (embedded_spu_file (entry, "-m32"))
return TRUE;
- return gld${EMULATION_NAME}_load_symbols (entry);
+ return ldelf_load_symbols (entry);
}
EOF
# parse_args and list_options functions.
#
PARSE_AND_LIST_PROLOGUE=${PARSE_AND_LIST_PROLOGUE}'
-#define OPTION_NO_TLS_OPT 321
-#define OPTION_NO_TLS_GET_ADDR_OPT (OPTION_NO_TLS_OPT + 1)
-#define OPTION_NEW_PLT (OPTION_NO_TLS_GET_ADDR_OPT + 1)
-#define OPTION_OLD_PLT (OPTION_NEW_PLT + 1)
-#define OPTION_OLD_GOT (OPTION_OLD_PLT + 1)
-#define OPTION_STUBSYMS (OPTION_OLD_GOT + 1)
-#define OPTION_NO_STUBSYMS (OPTION_STUBSYMS + 1)
-#define OPTION_PPC476_WORKAROUND (OPTION_NO_STUBSYMS + 1)
-#define OPTION_NO_PPC476_WORKAROUND (OPTION_PPC476_WORKAROUND + 1)
+enum ppc32_opt
+{
+ OPTION_NO_TLS_OPT = 321,
+ OPTION_NO_TLS_GET_ADDR_OPT,
+ OPTION_NEW_PLT,
+ OPTION_OLD_PLT,
+ OPTION_PLT_ALIGN,
+ OPTION_NO_PLT_ALIGN,
+ OPTION_NO_INLINE_OPT,
+ OPTION_OLD_GOT,
+ OPTION_STUBSYMS,
+ OPTION_NO_STUBSYMS,
+ OPTION_PPC476_WORKAROUND,
+ OPTION_NO_PPC476_WORKAROUND,
+ OPTION_NO_PICFIXUP,
+ OPTION_VLE_RELOC_FIXUP
+};
'
PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}'
{ "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 },
+ { "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}'
fprintf (file, _("\
- --emit-stub-syms Label linker stubs with a symbol.\n\
- --no-emit-stub-syms Don'\''t label linker stubs with a symbol.\n\
- --no-tls-optimize Don'\''t try to optimize TLS accesses.\n\
- --no-tls-get-addr-optimize Don'\''t use a special __tls_get_addr call.\n\
- --secure-plt Use new-style PLT if possible.\n\
- --bss-plt Force old-style BSS PLT.\n\
- --sdata-got Force GOT location just before .sdata.\n\
+ --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"
+ ));
+ 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=${PARSE_AND_LIST_OPTIONS}'\
+ fprintf (file, _("\
--ppc476-workaround [=pagesize]\n\
- Avoid a cache bug on ppc476.\n\
- --no-ppc476-workaround Disable workaround.\n"
+ Avoid a cache bug on ppc476\n"
+ ));
+ fprintf (file, _("\
+ --no-ppc476-workaround Disable workaround\n"
+ ));
+ fprintf (file, _("\
+ --no-pic-fixup Don'\''t edit non-pic to pic\n"
+ ));
+ fprintf (file, _("\
+ --vle-reloc-fixup Correct old object file 16A/16D relocation\n"
));
'
params.plt_style = PLT_OLD;
break;
+ case OPTION_PLT_ALIGN:
+ if (optarg != NULL)
+ {
+ char *end;
+ unsigned long val = strtoul (optarg, &end, 0);
+ if (*end || val > 5)
+ einfo (_("%F%P: invalid --plt-align `%s'\''\n"), optarg);
+ params.plt_stub_align = val;
+ }
+ else
+ params.plt_stub_align = 5;
+ break;
+
+ case OPTION_NO_PLT_ALIGN:
+ params.plt_stub_align = 0;
+ break;
+
+ case OPTION_NO_INLINE_OPT:
+ no_inline_opt = 1;
+ break;
+
case OPTION_OLD_GOT:
old_got = 1;
break;
if (optarg != NULL)
{
char *end;
- pagesize = strtoul (optarg, &end, 0);
+ params.pagesize = strtoul (optarg, &end, 0);
if (*end
- || (pagesize < 4096 && pagesize != 0)
- || pagesize != (pagesize & -pagesize))
- einfo (_("%P%F: invalid pagesize `%s'\''\n"), optarg);
+ || (params.pagesize < 4096 && params.pagesize != 0)
+ || params.pagesize != (params.pagesize & -params.pagesize))
+ einfo (_("%F%P: invalid pagesize `%s'\''\n"), optarg);
}
break;
case OPTION_NO_PPC476_WORKAROUND:
params.ppc476_workaround = 0;
break;
+
+ case OPTION_NO_PICFIXUP:
+ params.pic_fixup = -1;
+ break;
+
+ case OPTION_VLE_RELOC_FIXUP:
+ params.vle_reloc_fixup = 1;
+ break;
'
# Put these extra ppc32elf routines in ld_${EMULATION_NAME}_emulation
#
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=ppc_after_open_output
-LDEMUL_AFTER_OPEN=ppc_after_open
+if test -z "$VXWORKS_BASE_EM_FILE" ; then
+ LDEMUL_AFTER_CHECK_RELOCS=ppc_after_check_relocs
+fi
LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation
+LDEMUL_FINISH=ppc_finish
projects / thirdparty / binutils-gdb.git / blobdiff