aboutsummaryrefslogtreecommitdiff
path: root/ld/emultempl/spuelf.em
diff options
context:
space:
mode:
Diffstat (limited to 'ld/emultempl/spuelf.em')
-rw-r--r--ld/emultempl/spuelf.em504
1 files changed, 504 insertions, 0 deletions
diff --git a/ld/emultempl/spuelf.em b/ld/emultempl/spuelf.em
new file mode 100644
index 000000000000..05adeb8582c6
--- /dev/null
+++ b/ld/emultempl/spuelf.em
@@ -0,0 +1,504 @@
+# This shell script emits a C file. -*- C -*-
+# Copyright 2006, 2007 Free Software Foundation, Inc.
+#
+# This file is part of GLD, the Gnu Linker.
+#
+# 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
+# (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.
+#
+
+# This file is sourced from elf32.em, and defines extra spu specific
+# features.
+#
+cat >>e${EMULATION_NAME}.c <<EOF
+#include "ldctor.h"
+#include "elf32-spu.h"
+
+/* Non-zero if no overlay processing should be done. */
+static int no_overlays = 0;
+
+/* Non-zero if we want stubs on all calls out of overlay regions. */
+static int non_overlay_stubs = 0;
+
+/* Whether to emit symbols for stubs. */
+static int emit_stub_syms = 0;
+
+/* Non-zero to perform stack space analysis. */
+static int stack_analysis = 0;
+
+/* Whether to emit symbols with stack requirements for each function. */
+static int emit_stack_syms = 0;
+
+/* Range of valid addresses for loadable sections. */
+static bfd_vma local_store_lo = 0;
+static bfd_vma local_store_hi = 0x3ffff;
+
+static const char ovl_mgr[] = {
+EOF
+
+../binutils/bin2c < ${srcdir}/emultempl/spu_ovl.o >> e${EMULATION_NAME}.c
+
+cat >>e${EMULATION_NAME}.c <<EOF
+};
+
+static const struct _ovl_stream ovl_mgr_stream = {
+ ovl_mgr,
+ ovl_mgr + sizeof (ovl_mgr)
+};
+
+static asection *toe = NULL;
+
+
+static int
+is_spu_target (void)
+{
+ extern const bfd_target bfd_elf32_spu_vec;
+
+ return link_info.hash->creator == &bfd_elf32_spu_vec;
+}
+
+/* Create our note section. */
+
+static void
+spu_after_open (void)
+{
+ if (is_spu_target ()
+ && !link_info.relocatable
+ && link_info.input_bfds != NULL
+ && !spu_elf_create_sections (output_bfd, &link_info,
+ stack_analysis, emit_stack_syms))
+ einfo ("%X%P: can not create note section: %E\n");
+
+ gld${EMULATION_NAME}_after_open ();
+}
+
+/* Add section S at the end of output section OUTPUT_NAME.
+
+ Really, we should be duplicating ldlang.c map_input_to_output_sections
+ logic here, ie. using the linker script to find where the section
+ goes. That's rather a lot of code, and we don't want to run
+ map_input_to_output_sections again because most sections are already
+ mapped. So cheat, and put the section in a fixed place, ignoring any
+ attempt via a linker script to put .stub, .ovtab, and built-in
+ overlay manager code somewhere else. */
+
+static void
+spu_place_special_section (asection *s, const char *output_name)
+{
+ lang_output_section_statement_type *os;
+
+ os = lang_output_section_find (output_name);
+ if (os == NULL)
+ {
+ const char *save = s->name;
+ s->name = output_name;
+ gld${EMULATION_NAME}_place_orphan (s);
+ s->name = save;
+ }
+ else
+ lang_add_section (&os->children, s, os);
+
+ s->output_section->size += s->size;
+}
+
+/* Load built-in overlay manager, and tweak overlay section alignment. */
+
+static void
+spu_elf_load_ovl_mgr (void)
+{
+ lang_output_section_statement_type *os;
+ struct elf_link_hash_entry *h;
+
+ h = elf_link_hash_lookup (elf_hash_table (&link_info),
+ "__ovly_load", FALSE, FALSE, FALSE);
+
+ if (h != NULL
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && h->def_regular)
+ {
+ /* User supplied __ovly_load. */
+ }
+ else if (ovl_mgr_stream.start == ovl_mgr_stream.end)
+ einfo ("%F%P: no built-in overlay manager\n");
+ else
+ {
+ lang_input_statement_type *ovl_is;
+
+ ovl_is = lang_add_input_file ("builtin ovl_mgr",
+ lang_input_file_is_file_enum,
+ NULL);
+
+ if (!spu_elf_open_builtin_lib (&ovl_is->the_bfd, &ovl_mgr_stream))
+ einfo ("%X%P: can not open built-in overlay manager: %E\n");
+ else
+ {
+ asection *in;
+
+ if (!load_symbols (ovl_is, NULL))
+ einfo ("%X%P: can not load built-in overlay manager: %E\n");
+
+ /* Map overlay manager sections to output sections. */
+ for (in = ovl_is->the_bfd->sections; in != NULL; in = in->next)
+ if ((in->flags & (SEC_ALLOC | SEC_LOAD))
+ == (SEC_ALLOC | SEC_LOAD))
+ spu_place_special_section (in, ".text");
+ }
+ }
+
+ /* Ensure alignment of overlay sections is sufficient. */
+ for (os = &lang_output_section_statement.head->output_section_statement;
+ os != NULL;
+ os = os->next)
+ if (os->bfd_section != NULL
+ && spu_elf_section_data (os->bfd_section) != NULL
+ && spu_elf_section_data (os->bfd_section)->ovl_index != 0)
+ {
+ if (os->bfd_section->alignment_power < 4)
+ os->bfd_section->alignment_power = 4;
+
+ /* Also ensure size rounds up. */
+ os->block_value = 16;
+ }
+}
+
+/* Go find if we need to do anything special for overlays. */
+
+static void
+spu_before_allocation (void)
+{
+ if (is_spu_target ()
+ && !link_info.relocatable
+ && !no_overlays)
+ {
+ /* Size the sections. This is premature, but we need to know the
+ rough layout so that overlays can be found. */
+ expld.phase = lang_mark_phase_enum;
+ expld.dataseg.phase = exp_dataseg_none;
+ one_lang_size_sections_pass (NULL, TRUE);
+
+ /* Find overlays by inspecting section vmas. */
+ if (spu_elf_find_overlays (output_bfd, &link_info))
+ {
+ asection *stub, *ovtab;
+
+ if (!spu_elf_size_stubs (output_bfd, &link_info, non_overlay_stubs,
+ stack_analysis, &stub, &ovtab, &toe))
+ einfo ("%X%P: can not size overlay stubs: %E\n");
+
+ if (stub != NULL)
+ {
+ spu_place_special_section (stub, ".text");
+ spu_place_special_section (ovtab, ".data");
+ spu_place_special_section (toe, ".toe");
+
+ spu_elf_load_ovl_mgr ();
+ }
+ }
+
+ /* We must not cache anything from the preliminary sizing. */
+ lang_reset_memory_regions ();
+ }
+
+ gld${EMULATION_NAME}_before_allocation ();
+}
+
+/* Final emulation specific call. */
+
+static void
+gld${EMULATION_NAME}_finish (void)
+{
+ int need_laying_out;
+
+ need_laying_out = bfd_elf_discard_info (output_bfd, &link_info);
+
+ gld${EMULATION_NAME}_map_segments (need_laying_out);
+
+ if (is_spu_target () && local_store_lo < local_store_hi)
+ {
+ asection *s;
+
+ s = spu_elf_check_vma (output_bfd, local_store_lo, local_store_hi);
+ if (s != NULL)
+ einfo ("%X%P: %A exceeds local store range\n", s);
+ }
+
+ if (toe != NULL
+ && !spu_elf_build_stubs (&link_info,
+ emit_stub_syms || link_info.emitrelocations,
+ toe))
+ einfo ("%X%P: can not build overlay stubs: %E\n");
+
+ finish_default ();
+}
+
+EOF
+
+if grep -q 'ld_elf.*ppc.*_emulation' ldemul-list.h; then
+ cat >>e${EMULATION_NAME}.c <<EOF
+#include "filenames.h"
+#include <fcntl.h>
+#include <sys/wait.h>
+
+struct tflist {
+ struct tflist *next;
+ char name[9];
+};
+
+static struct tflist *tmp_file_list;
+
+static void clean_tmp (void)
+{
+ for (; tmp_file_list != NULL; tmp_file_list = tmp_file_list->next)
+ unlink (tmp_file_list->name);
+}
+
+static const char *
+base_name (const char *path)
+{
+ const char *file = strrchr (path, '/');
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+ {
+ char *bslash = strrchr (path, '\\\\');
+
+ if (file == NULL || (bslash != NULL && bslash > file))
+ file = bslash;
+ if (file == NULL
+ && path[0] != '\0'
+ && path[1] == ':')
+ file = path + 1;
+ }
+#endif
+ if (file == NULL)
+ file = path;
+ else
+ ++file;
+ return file;
+}
+
+/* This function is called when building a ppc32 or ppc64 executable
+ to handle embedded spu images. */
+extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *);
+
+bfd_boolean
+embedded_spu_file (lang_input_statement_type *entry, const char *flags)
+{
+ const char *cmd[6];
+ const char *sym;
+ char *handle, *p;
+ struct tflist *tf;
+ char *oname;
+ int fd;
+ pid_t pid;
+ int status;
+ union lang_statement_union **old_stat_tail;
+ union lang_statement_union **old_file_tail;
+ union lang_statement_union *new_ent;
+ lang_input_statement_type *search;
+
+ if (entry->the_bfd->format != bfd_object
+ || strcmp (entry->the_bfd->xvec->name, "elf32-spu") != 0
+ || (entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_EXEC
+ && entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_DYN))
+ return FALSE;
+
+ /* Use the filename as the symbol marking the program handle struct. */
+ sym = base_name (entry->the_bfd->filename);
+
+ handle = xstrdup (sym);
+ for (p = handle; *p; ++p)
+ if (!(ISALNUM (*p) || *p == '$' || *p == '.'))
+ *p = '_';
+
+ if (tmp_file_list == NULL)
+ atexit (clean_tmp);
+ tf = xmalloc (sizeof (*tf));
+ tf->next = tmp_file_list;
+ tmp_file_list = tf;
+ oname = tf->name;
+ memcpy (tf->name, "ldXXXXXX", sizeof (tf->name));
+
+#ifdef HAVE_MKSTEMP
+ fd = mkstemp (oname);
+#else
+ oname = mktemp (oname);
+ if (oname == NULL)
+ return FALSE;
+ fd = open (oname, O_RDWR | O_CREAT | O_EXCL, 0600);
+#endif
+ if (fd == -1)
+ return FALSE;
+ close (fd);
+
+ for (search = (lang_input_statement_type *) input_file_chain.head;
+ search != NULL;
+ search = (lang_input_statement_type *) search->next_real_file)
+ {
+ const char *infile = base_name (search->filename);
+
+ if (infile != NULL
+ && strncmp (infile, "crtbegin", 8) == 0)
+ {
+ if (infile[8] == 'S')
+ flags = concat (flags, " -fPIC", NULL);
+ else if (infile[8] == 'T')
+ flags = concat (flags, " -fpie", NULL);
+ break;
+ }
+ }
+
+ /* Use fork() and exec() rather than system() so that we don't
+ need to worry about quoting args. */
+ cmd[0] = EMBEDSPU;
+ cmd[1] = flags;
+ cmd[2] = handle;
+ cmd[3] = entry->the_bfd->filename;
+ cmd[4] = oname;
+ cmd[5] = NULL;
+ if (trace_file_tries)
+ {
+ info_msg (_("running: %s \"%s\" \"%s\" \"%s\" \"%s\"\n"),
+ cmd[0], cmd[1], cmd[2], cmd[3], cmd[4]);
+ fflush (stdout);
+ }
+
+ pid = fork ();
+ if (pid == -1)
+ return FALSE;
+ if (pid == 0)
+ {
+ execvp (cmd[0], (char *const *) cmd);
+ if (strcmp ("embedspu", EMBEDSPU) != 0)
+ {
+ cmd[0] = "embedspu";
+ execvp (cmd[0], (char *const *) cmd);
+ }
+ perror (cmd[0]);
+ _exit (127);
+ }
+#ifdef HAVE_WAITPID
+#define WAITFOR(PID, STAT) waitpid (PID, STAT, 0)
+#else
+#define WAITFOR(PID, STAT) wait (STAT)
+#endif
+ if (WAITFOR (pid, &status) != pid
+ || !WIFEXITED (status)
+ || WEXITSTATUS (status) != 0)
+ return FALSE;
+#undef WAITFOR
+
+ old_stat_tail = stat_ptr->tail;
+ old_file_tail = input_file_chain.tail;
+ if (lang_add_input_file (oname, lang_input_file_is_file_enum, NULL) == NULL)
+ return FALSE;
+
+ /* lang_add_input_file put the new list entry at the end of the statement
+ and input file lists. Move it to just after the current entry. */
+ new_ent = *old_stat_tail;
+ *old_stat_tail = NULL;
+ stat_ptr->tail = old_stat_tail;
+ *old_file_tail = NULL;
+ input_file_chain.tail = old_file_tail;
+ new_ent->header.next = entry->header.next;
+ entry->header.next = new_ent;
+ new_ent->input_statement.next_real_file = entry->next_real_file;
+ entry->next_real_file = new_ent;
+
+ /* Ensure bfd sections are excluded from the output. */
+ bfd_section_list_clear (entry->the_bfd);
+ entry->loaded = TRUE;
+ return TRUE;
+}
+
+EOF
+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_SPU_PLUGIN 301
+#define OPTION_SPU_NO_OVERLAYS (OPTION_SPU_PLUGIN + 1)
+#define OPTION_SPU_STUB_SYMS (OPTION_SPU_NO_OVERLAYS + 1)
+#define OPTION_SPU_NON_OVERLAY_STUBS (OPTION_SPU_STUB_SYMS + 1)
+#define OPTION_SPU_LOCAL_STORE (OPTION_SPU_NON_OVERLAY_STUBS + 1)
+#define OPTION_SPU_STACK_ANALYSIS (OPTION_SPU_LOCAL_STORE + 1)
+#define OPTION_SPU_STACK_SYMS (OPTION_SPU_STACK_ANALYSIS + 1)
+'
+
+PARSE_AND_LIST_LONGOPTS='
+ { "plugin", no_argument, NULL, OPTION_SPU_PLUGIN },
+ { "no-overlays", no_argument, NULL, OPTION_SPU_NO_OVERLAYS },
+ { "emit-stub-syms", no_argument, NULL, OPTION_SPU_STUB_SYMS },
+ { "extra-overlay-stubs", no_argument, NULL, OPTION_SPU_NON_OVERLAY_STUBS },
+ { "local-store", required_argument, NULL, OPTION_SPU_LOCAL_STORE },
+ { "stack-analysis", no_argument, NULL, OPTION_SPU_STACK_ANALYSIS },
+ { "emit-stack-syms", no_argument, NULL, OPTION_SPU_STACK_SYMS },
+'
+
+PARSE_AND_LIST_OPTIONS='
+ fprintf (file, _("\
+ --plugin Make SPU plugin.\n\
+ --no-overlays No overlay handling.\n\
+ --emit-stub-syms Add symbols on overlay call stubs.\n\
+ --extra-overlay-stubs Add stubs on all calls out of overlay regions.\n\
+ --local-store=lo:hi Valid address range.\n\
+ --stack-analysis Estimate maximum stack requirement.\n\
+ --emit-stack-syms Add __stack_func giving stack needed for each func.\n"
+ ));
+'
+
+PARSE_AND_LIST_ARGS_CASES='
+ case OPTION_SPU_PLUGIN:
+ spu_elf_plugin (1);
+ break;
+
+ case OPTION_SPU_NO_OVERLAYS:
+ no_overlays = 1;
+ break;
+
+ case OPTION_SPU_STUB_SYMS:
+ emit_stub_syms = 1;
+ break;
+
+ case OPTION_SPU_NON_OVERLAY_STUBS:
+ non_overlay_stubs = 1;
+ break;
+
+ case OPTION_SPU_LOCAL_STORE:
+ {
+ char *end;
+ local_store_lo = strtoul (optarg, &end, 0);
+ if (*end == '\'':'\'')
+ {
+ local_store_hi = strtoul (end + 1, &end, 0);
+ if (*end == 0)
+ break;
+ }
+ einfo (_("%P%F: invalid --local-store address range `%s'\''\n"), optarg);
+ }
+ break;
+
+ 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
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-21 09:32:49 +0000