47f6dab9a3
overlays where possible. Use a faster call stub, or optionally at compile time, a more compact stub. Double size of _ovly_buf_table so that low bit of _ovly_table.buf can be used as a "present" bit. Reserve an extra _ovly_table entry for index zero.
507 lines
14 KiB
Plaintext
507 lines
14 KiB
Plaintext
# This shell script emits a C file. -*- C -*-
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# Copyright 2006, 2007 Free Software Foundation, Inc.
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#
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# This file is part of the GNU Binutils.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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# MA 02110-1301, USA.
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#
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# This file is sourced from elf32.em, and defines extra spu specific
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# features.
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#
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fragment <<EOF
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#include "ldctor.h"
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#include "elf32-spu.h"
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/* Non-zero if no overlay processing should be done. */
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static int no_overlays = 0;
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/* Non-zero if we want stubs on all calls out of overlay regions. */
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static int non_overlay_stubs = 0;
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/* Whether to emit symbols for stubs. */
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static int emit_stub_syms = 0;
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/* Non-zero to perform stack space analysis. */
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static int stack_analysis = 0;
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/* Whether to emit symbols with stack requirements for each function. */
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static int emit_stack_syms = 0;
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/* Range of valid addresses for loadable sections. */
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static bfd_vma local_store_lo = 0;
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static bfd_vma local_store_hi = 0x3ffff;
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static const char ovl_mgr[] = {
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EOF
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../binutils/bin2c < ${srcdir}/emultempl/spu_ovl.o >> e${EMULATION_NAME}.c
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fragment <<EOF
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};
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static const struct _ovl_stream ovl_mgr_stream = {
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ovl_mgr,
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ovl_mgr + sizeof (ovl_mgr)
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};
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static int
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is_spu_target (void)
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{
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extern const bfd_target bfd_elf32_spu_vec;
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return link_info.hash->creator == &bfd_elf32_spu_vec;
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}
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/* Create our note section. */
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static void
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spu_after_open (void)
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{
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if (is_spu_target ()
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&& !link_info.relocatable
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&& link_info.input_bfds != NULL
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&& !spu_elf_create_sections (output_bfd, &link_info,
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stack_analysis, emit_stack_syms))
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einfo ("%X%P: can not create note section: %E\n");
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gld${EMULATION_NAME}_after_open ();
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}
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/* If O is NULL, add section S at the end of output section OUTPUT_NAME.
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If O is not NULL, add section S at the beginning of output section O.
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Really, we should be duplicating ldlang.c map_input_to_output_sections
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logic here, ie. using the linker script to find where the section
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goes. That's rather a lot of code, and we don't want to run
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map_input_to_output_sections again because most sections are already
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mapped. So cheat, and put the section in a fixed place, ignoring any
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attempt via a linker script to put .stub, .ovtab, and built-in
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overlay manager code somewhere else. */
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static void
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spu_place_special_section (asection *s, asection *o, const char *output_name)
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{
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lang_output_section_statement_type *os;
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os = lang_output_section_find (o != NULL ? o->name : output_name);
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if (os == NULL)
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{
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const char *save = s->name;
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s->name = output_name;
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gld${EMULATION_NAME}_place_orphan (s);
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s->name = save;
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}
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else if (o != NULL && os->children.head != NULL)
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{
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lang_statement_list_type add;
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lang_list_init (&add);
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lang_add_section (&add, s, os);
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*add.tail = os->children.head;
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os->children.head = add.head;
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}
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else
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lang_add_section (&os->children, s, os);
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s->output_section->size += s->size;
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}
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/* Load built-in overlay manager, and tweak overlay section alignment. */
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static void
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spu_elf_load_ovl_mgr (void)
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{
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lang_output_section_statement_type *os;
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struct elf_link_hash_entry *h;
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h = elf_link_hash_lookup (elf_hash_table (&link_info),
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"__ovly_load", FALSE, FALSE, FALSE);
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if (h != NULL
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&& (h->root.type == bfd_link_hash_defined
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|| h->root.type == bfd_link_hash_defweak)
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&& h->def_regular)
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{
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/* User supplied __ovly_load. */
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}
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else if (ovl_mgr_stream.start == ovl_mgr_stream.end)
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einfo ("%F%P: no built-in overlay manager\n");
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else
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{
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lang_input_statement_type *ovl_is;
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ovl_is = lang_add_input_file ("builtin ovl_mgr",
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lang_input_file_is_file_enum,
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NULL);
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if (!spu_elf_open_builtin_lib (&ovl_is->the_bfd, &ovl_mgr_stream))
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einfo ("%X%P: can not open built-in overlay manager: %E\n");
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else
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{
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asection *in;
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if (!load_symbols (ovl_is, NULL))
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einfo ("%X%P: can not load built-in overlay manager: %E\n");
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/* Map overlay manager sections to output sections. */
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for (in = ovl_is->the_bfd->sections; in != NULL; in = in->next)
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if ((in->flags & (SEC_ALLOC | SEC_LOAD))
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== (SEC_ALLOC | SEC_LOAD))
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spu_place_special_section (in, NULL, ".text");
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}
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}
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/* Ensure alignment of overlay sections is sufficient. */
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for (os = &lang_output_section_statement.head->output_section_statement;
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os != NULL;
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os = os->next)
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if (os->bfd_section != NULL
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&& spu_elf_section_data (os->bfd_section) != NULL
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&& spu_elf_section_data (os->bfd_section)->u.o.ovl_index != 0)
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{
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if (os->bfd_section->alignment_power < 4)
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os->bfd_section->alignment_power = 4;
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/* Also ensure size rounds up. */
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os->block_value = 16;
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}
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}
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/* Go find if we need to do anything special for overlays. */
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static void
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spu_before_allocation (void)
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{
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if (is_spu_target ()
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&& !link_info.relocatable
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&& !no_overlays)
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{
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/* Size the sections. This is premature, but we need to know the
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rough layout so that overlays can be found. */
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expld.phase = lang_mark_phase_enum;
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expld.dataseg.phase = exp_dataseg_none;
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one_lang_size_sections_pass (NULL, TRUE);
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/* Find overlays by inspecting section vmas. */
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if (spu_elf_find_overlays (output_bfd, &link_info))
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{
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int ret;
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ret = spu_elf_size_stubs (output_bfd, &link_info,
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spu_place_special_section,
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non_overlay_stubs);
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if (ret == 0)
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einfo ("%X%P: can not size overlay stubs: %E\n");
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else if (ret == 2)
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spu_elf_load_ovl_mgr ();
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}
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/* We must not cache anything from the preliminary sizing. */
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lang_reset_memory_regions ();
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}
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gld${EMULATION_NAME}_before_allocation ();
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}
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/* Final emulation specific call. */
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static void
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gld${EMULATION_NAME}_finish (void)
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{
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int need_laying_out;
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need_laying_out = bfd_elf_discard_info (output_bfd, &link_info);
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gld${EMULATION_NAME}_map_segments (need_laying_out);
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if (is_spu_target () && local_store_lo < local_store_hi)
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{
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asection *s;
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s = spu_elf_check_vma (output_bfd, local_store_lo, local_store_hi);
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if (s != NULL)
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einfo ("%X%P: %A exceeds local store range\n", s);
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}
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if (!spu_elf_build_stubs (&link_info,
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emit_stub_syms || link_info.emitrelocations))
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einfo ("%X%P: can not build overlay stubs: %E\n");
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finish_default ();
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}
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EOF
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if grep -q 'ld_elf.*ppc.*_emulation' ldemul-list.h; then
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fragment <<EOF
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#include "filenames.h"
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#include <fcntl.h>
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#include <sys/wait.h>
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struct tflist {
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struct tflist *next;
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char name[9];
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};
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static struct tflist *tmp_file_list;
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static void clean_tmp (void)
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{
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for (; tmp_file_list != NULL; tmp_file_list = tmp_file_list->next)
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unlink (tmp_file_list->name);
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}
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static const char *
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base_name (const char *path)
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{
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const char *file = strrchr (path, '/');
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#ifdef HAVE_DOS_BASED_FILE_SYSTEM
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{
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char *bslash = strrchr (path, '\\\\');
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if (file == NULL || (bslash != NULL && bslash > file))
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file = bslash;
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if (file == NULL
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&& path[0] != '\0'
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&& path[1] == ':')
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file = path + 1;
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}
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#endif
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if (file == NULL)
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file = path;
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else
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++file;
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return file;
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}
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/* This function is called when building a ppc32 or ppc64 executable
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to handle embedded spu images. */
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extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *);
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bfd_boolean
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embedded_spu_file (lang_input_statement_type *entry, const char *flags)
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{
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const char *cmd[6];
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const char *sym;
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char *handle, *p;
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struct tflist *tf;
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char *oname;
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int fd;
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pid_t pid;
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int status;
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union lang_statement_union **old_stat_tail;
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union lang_statement_union **old_file_tail;
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union lang_statement_union *new_ent;
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lang_input_statement_type *search;
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if (entry->the_bfd->format != bfd_object
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|| strcmp (entry->the_bfd->xvec->name, "elf32-spu") != 0
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|| (entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_EXEC
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&& entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_DYN))
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return FALSE;
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/* Use the filename as the symbol marking the program handle struct. */
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sym = base_name (entry->the_bfd->filename);
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handle = xstrdup (sym);
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for (p = handle; *p; ++p)
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if (!(ISALNUM (*p) || *p == '$' || *p == '.'))
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*p = '_';
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if (tmp_file_list == NULL)
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atexit (clean_tmp);
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tf = xmalloc (sizeof (*tf));
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tf->next = tmp_file_list;
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tmp_file_list = tf;
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oname = tf->name;
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memcpy (tf->name, "ldXXXXXX", sizeof (tf->name));
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#ifdef HAVE_MKSTEMP
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fd = mkstemp (oname);
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#else
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oname = mktemp (oname);
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if (oname == NULL)
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return FALSE;
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fd = open (oname, O_RDWR | O_CREAT | O_EXCL, 0600);
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#endif
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if (fd == -1)
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return FALSE;
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close (fd);
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for (search = (lang_input_statement_type *) input_file_chain.head;
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search != NULL;
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search = (lang_input_statement_type *) search->next_real_file)
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if (search->filename != NULL)
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{
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const char *infile = base_name (search->filename);
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if (strncmp (infile, "crtbegin", 8) == 0)
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{
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if (infile[8] == 'S')
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flags = concat (flags, " -fPIC", NULL);
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else if (infile[8] == 'T')
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flags = concat (flags, " -fpie", NULL);
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break;
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}
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}
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/* Use fork() and exec() rather than system() so that we don't
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need to worry about quoting args. */
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cmd[0] = EMBEDSPU;
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cmd[1] = flags;
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cmd[2] = handle;
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cmd[3] = entry->the_bfd->filename;
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cmd[4] = oname;
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cmd[5] = NULL;
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if (trace_file_tries)
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{
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info_msg (_("running: %s \"%s\" \"%s\" \"%s\" \"%s\"\n"),
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cmd[0], cmd[1], cmd[2], cmd[3], cmd[4]);
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fflush (stdout);
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}
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pid = fork ();
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if (pid == -1)
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return FALSE;
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if (pid == 0)
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{
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execvp (cmd[0], (char *const *) cmd);
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if (strcmp ("embedspu", EMBEDSPU) != 0)
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{
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cmd[0] = "embedspu";
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execvp (cmd[0], (char *const *) cmd);
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}
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perror (cmd[0]);
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_exit (127);
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}
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#ifdef HAVE_WAITPID
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#define WAITFOR(PID, STAT) waitpid (PID, STAT, 0)
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#else
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#define WAITFOR(PID, STAT) wait (STAT)
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#endif
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if (WAITFOR (pid, &status) != pid
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|| !WIFEXITED (status)
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|| WEXITSTATUS (status) != 0)
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return FALSE;
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#undef WAITFOR
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old_stat_tail = stat_ptr->tail;
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old_file_tail = input_file_chain.tail;
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if (lang_add_input_file (oname, lang_input_file_is_file_enum, NULL) == NULL)
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return FALSE;
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/* lang_add_input_file put the new list entry at the end of the statement
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and input file lists. Move it to just after the current entry. */
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new_ent = *old_stat_tail;
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*old_stat_tail = NULL;
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stat_ptr->tail = old_stat_tail;
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*old_file_tail = NULL;
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input_file_chain.tail = old_file_tail;
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new_ent->header.next = entry->header.next;
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entry->header.next = new_ent;
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new_ent->input_statement.next_real_file = entry->next_real_file;
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entry->next_real_file = new_ent;
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/* Ensure bfd sections are excluded from the output. */
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bfd_section_list_clear (entry->the_bfd);
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entry->loaded = TRUE;
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return TRUE;
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}
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EOF
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fi
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# Define some shell vars to insert bits of code into the standard elf
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# parse_args and list_options functions.
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#
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PARSE_AND_LIST_PROLOGUE='
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#define OPTION_SPU_PLUGIN 301
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#define OPTION_SPU_NO_OVERLAYS (OPTION_SPU_PLUGIN + 1)
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#define OPTION_SPU_STUB_SYMS (OPTION_SPU_NO_OVERLAYS + 1)
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#define OPTION_SPU_NON_OVERLAY_STUBS (OPTION_SPU_STUB_SYMS + 1)
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#define OPTION_SPU_LOCAL_STORE (OPTION_SPU_NON_OVERLAY_STUBS + 1)
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#define OPTION_SPU_STACK_ANALYSIS (OPTION_SPU_LOCAL_STORE + 1)
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#define OPTION_SPU_STACK_SYMS (OPTION_SPU_STACK_ANALYSIS + 1)
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'
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PARSE_AND_LIST_LONGOPTS='
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{ "plugin", no_argument, NULL, OPTION_SPU_PLUGIN },
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{ "no-overlays", no_argument, NULL, OPTION_SPU_NO_OVERLAYS },
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{ "emit-stub-syms", no_argument, NULL, OPTION_SPU_STUB_SYMS },
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{ "extra-overlay-stubs", no_argument, NULL, OPTION_SPU_NON_OVERLAY_STUBS },
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{ "local-store", required_argument, NULL, OPTION_SPU_LOCAL_STORE },
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{ "stack-analysis", no_argument, NULL, OPTION_SPU_STACK_ANALYSIS },
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{ "emit-stack-syms", no_argument, NULL, OPTION_SPU_STACK_SYMS },
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'
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|
PARSE_AND_LIST_OPTIONS='
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|
fprintf (file, _("\
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|
--plugin Make SPU plugin.\n\
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|
--no-overlays No overlay handling.\n\
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|
--emit-stub-syms Add symbols on overlay call stubs.\n\
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|
--extra-overlay-stubs Add stubs on all calls out of overlay regions.\n\
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|
--local-store=lo:hi Valid address range.\n\
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|
--stack-analysis Estimate maximum stack requirement.\n\
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|
--emit-stack-syms Add sym giving stack needed for each func.\n"
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));
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'
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PARSE_AND_LIST_ARGS_CASES='
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case OPTION_SPU_PLUGIN:
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spu_elf_plugin (1);
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break;
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|
case OPTION_SPU_NO_OVERLAYS:
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|
no_overlays = 1;
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|
break;
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case OPTION_SPU_STUB_SYMS:
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|
emit_stub_syms = 1;
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break;
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case OPTION_SPU_NON_OVERLAY_STUBS:
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non_overlay_stubs = 1;
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break;
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|
case OPTION_SPU_LOCAL_STORE:
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|
{
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|
char *end;
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|
local_store_lo = strtoul (optarg, &end, 0);
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|
if (*end == '\'':'\'')
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|
{
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|
local_store_hi = strtoul (end + 1, &end, 0);
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|
if (*end == 0)
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|
break;
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|
}
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|
einfo (_("%P%F: invalid --local-store address range `%s'\''\n"), optarg);
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|
}
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|
break;
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|
case OPTION_SPU_STACK_ANALYSIS:
|
|
stack_analysis = 1;
|
|
break;
|
|
|
|
case OPTION_SPU_STACK_SYMS:
|
|
emit_stack_syms = 1;
|
|
break;
|
|
'
|
|
|
|
LDEMUL_AFTER_OPEN=spu_after_open
|
|
LDEMUL_BEFORE_ALLOCATION=spu_before_allocation
|
|
LDEMUL_FINISH=gld${EMULATION_NAME}_finish
|