diff options
Diffstat (limited to 'ld/emultempl/spuelf.em')
| -rw-r--r-- | ld/emultempl/spuelf.em | 167 |
1 files changed, 142 insertions, 25 deletions
diff --git a/ld/emultempl/spuelf.em b/ld/emultempl/spuelf.em index bfabb8b..f72690d 100644 --- a/ld/emultempl/spuelf.em +++ b/ld/emultempl/spuelf.em @@ -1,5 +1,5 @@ # This shell script emits a C file. -*- C -*- -# Copyright 2006, 2007, 2008 Free Software Foundation, Inc. +# Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc. # # This file is part of the GNU Binutils. # @@ -37,11 +37,13 @@ static struct spu_elf_params params = &spu_elf_load_ovl_mgr, &spu_elf_open_overlay_script, &spu_elf_relink, - 0, ovly_normal, 0, 0, 0, 0, + 0, ovly_normal, 0, 0, 0, 0, 0, 0, 0x3ffff, - 1, 0, 0, 2000 + 1, 0, 16, 0, 0, 2000 }; +static unsigned int num_lines_set = 0; +static unsigned int line_size_set = 0; static char *auto_overlay_file = 0; int my_argc; char **my_argv; @@ -52,7 +54,20 @@ EOF if ! cat ${srcdir}/emultempl/spu_ovl.o_c >> e${EMULATION_NAME}.c then echo >&2 "Missing ${srcdir}/emultempl/spu_ovl.o_c" - echo >&2 "You must build gas/as-new with --target=spu to build spu_ovl.o" + echo >&2 "You must build gas/as-new with --target=spu" + exit 1 +fi + +fragment <<EOF +}; + +static const char icache_mgr[] = { +EOF + +if ! cat ${srcdir}/emultempl/spu_icache.o_c >> e${EMULATION_NAME}.c +then + echo >&2 "Missing ${srcdir}/emultempl/spu_icache.o_c" + echo >&2 "You must build gas/as-new with --target=spu" exit 1 fi @@ -64,6 +79,11 @@ static const struct _ovl_stream ovl_mgr_stream = { ovl_mgr + sizeof (ovl_mgr) }; +static const struct _ovl_stream icache_mgr_stream = { + icache_mgr, + icache_mgr + sizeof (icache_mgr) +}; + static int is_spu_target (void) @@ -96,7 +116,8 @@ spu_after_open (void) } /* If O is NULL, add section S at the end of output section OUTPUT_NAME. - If O is not NULL, add section S at the beginning of output section O. + If O is not NULL, add section S at the beginning of output section O, + except for soft-icache which adds to the end. Really, we should be duplicating ldlang.c map_input_to_output_sections logic here, ie. using the linker script to find where the section @@ -115,8 +136,12 @@ spu_place_special_section (asection *s, asection *o, const char *output_name) output_name = o->name; os = lang_output_section_find (output_name); if (os == NULL) - gld${EMULATION_NAME}_place_orphan (s, output_name, 0); - else if (o != NULL && os->children.head != NULL) + { + os = gld${EMULATION_NAME}_place_orphan (s, output_name, 0); + os->addr_tree = NULL; + } + else if (params.ovly_flavour != ovly_soft_icache + && o != NULL && os->children.head != NULL) { lang_statement_list_type add; @@ -126,7 +151,21 @@ spu_place_special_section (asection *s, asection *o, const char *output_name) os->children.head = add.head; } else - lang_add_section (&os->children, s, os); + { + if (params.ovly_flavour == ovly_soft_icache && o != NULL) + { + /* Pad this stub section so that it finishes at the + end of the icache line. */ + etree_type *e_size; + lang_statement_list_type *save = stat_ptr; + + stat_ptr = &os->children; + e_size = exp_intop (params.line_size - s->size); + lang_add_assignment (exp_assop ('=', ".", e_size)); + stat_ptr = save; + } + lang_add_section (&os->children, s, os); + } s->output_section->size += s->size; } @@ -137,10 +176,19 @@ static bfd_size_type spu_elf_load_ovl_mgr (void) { struct elf_link_hash_entry *h; + const char *ovly_mgr_entry; + const struct _ovl_stream *mgr_stream; bfd_size_type total = 0; + ovly_mgr_entry = "__ovly_load"; + mgr_stream = &ovl_mgr_stream; + if (params.ovly_flavour == ovly_soft_icache) + { + ovly_mgr_entry = "__icache_br_handler"; + mgr_stream = &icache_mgr_stream; + } h = elf_link_hash_lookup (elf_hash_table (&link_info), - "__ovly_load", FALSE, FALSE, FALSE); + ovly_mgr_entry, FALSE, FALSE, FALSE); if (h != NULL && (h->root.type == bfd_link_hash_defined @@ -149,7 +197,7 @@ spu_elf_load_ovl_mgr (void) { /* User supplied __ovly_load. */ } - else if (ovl_mgr_stream.start == ovl_mgr_stream.end) + else if (mgr_stream->start == mgr_stream->end) einfo ("%F%P: no built-in overlay manager\n"); else { @@ -159,7 +207,7 @@ spu_elf_load_ovl_mgr (void) lang_input_file_is_file_enum, NULL); - if (!spu_elf_open_builtin_lib (&ovl_is->the_bfd, &ovl_mgr_stream)) + if (!spu_elf_open_builtin_lib (&ovl_is->the_bfd, mgr_stream)) einfo ("%X%P: can not open built-in overlay manager: %E\n"); else { @@ -168,13 +216,38 @@ spu_elf_load_ovl_mgr (void) 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. */ + /* Map overlay manager sections to output sections. + First try for a matching output section name, if that + fails then try mapping .abc.xyz to .abc, otherwise map + to .text. */ for (in = ovl_is->the_bfd->sections; in != NULL; in = in->next) if ((in->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) { - total += in->size; - spu_place_special_section (in, NULL, ".text"); + const char *oname = in->name; + if (strncmp (in->name, ".ovl.init", 9) != 0) + { + total += in->size; + if (!lang_output_section_find (oname)) + { + lang_output_section_statement_type *os = NULL; + char *p = strchr (oname + 1, '.'); + if (p != NULL) + { + size_t len = p - oname; + p = memcpy (xmalloc (len + 1), oname, len); + p[len] = '\0'; + os = lang_output_section_find (p); + free (p); + } + if (os != NULL) + oname = os->name; + else + oname = ".text"; + } + } + + spu_place_special_section (in, NULL, oname); } } } @@ -338,9 +411,6 @@ gld${EMULATION_NAME}_finish (void) } else if (params.auto_overlay) einfo ("%P: --auto-overlay ignored with zero local store range\n"); - - if (!spu_elf_build_stubs (&link_info)) - einfo ("%F%P: can not build overlay stubs: %E\n"); } finish_default (); @@ -520,8 +590,11 @@ PARSE_AND_LIST_PROLOGUE=' #define OPTION_SPU_AUTO_OVERLAY (OPTION_SPU_STACK_SYMS + 1) #define OPTION_SPU_AUTO_RELINK (OPTION_SPU_AUTO_OVERLAY + 1) #define OPTION_SPU_OVERLAY_RODATA (OPTION_SPU_AUTO_RELINK + 1) -#define OPTION_SPU_NUM_REGIONS (OPTION_SPU_OVERLAY_RODATA + 1) -#define OPTION_SPU_FIXED_SPACE (OPTION_SPU_NUM_REGIONS + 1) +#define OPTION_SPU_SOFT_ICACHE (OPTION_SPU_OVERLAY_RODATA + 1) +#define OPTION_SPU_LINE_SIZE (OPTION_SPU_SOFT_ICACHE + 1) +#define OPTION_SPU_NUM_LINES (OPTION_SPU_LINE_SIZE + 1) +#define OPTION_SPU_LRLIVE (OPTION_SPU_NUM_LINES + 1) +#define OPTION_SPU_FIXED_SPACE (OPTION_SPU_LRLIVE + 1) #define OPTION_SPU_RESERVED_SPACE (OPTION_SPU_FIXED_SPACE + 1) #define OPTION_SPU_EXTRA_STACK (OPTION_SPU_RESERVED_SPACE + 1) #define OPTION_SPU_NO_AUTO_OVERLAY (OPTION_SPU_EXTRA_STACK + 1) @@ -529,6 +602,10 @@ PARSE_AND_LIST_PROLOGUE=' PARSE_AND_LIST_LONGOPTS=' { "plugin", no_argument, NULL, OPTION_SPU_PLUGIN }, + { "soft-icache", no_argument, NULL, OPTION_SPU_SOFT_ICACHE }, + { "lrlive-analysis", no_argument, NULL, OPTION_SPU_LRLIVE }, + { "num-lines", required_argument, NULL, OPTION_SPU_NUM_LINES }, + { "line-size", required_argument, NULL, OPTION_SPU_LINE_SIZE }, { "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 }, @@ -538,7 +615,8 @@ PARSE_AND_LIST_LONGOPTS=' { "auto-overlay", optional_argument, NULL, OPTION_SPU_AUTO_OVERLAY }, { "auto-relink", no_argument, NULL, OPTION_SPU_AUTO_RELINK }, { "overlay-rodata", no_argument, NULL, OPTION_SPU_OVERLAY_RODATA }, - { "num-regions", required_argument, NULL, OPTION_SPU_NUM_REGIONS }, + { "num-regions", required_argument, NULL, OPTION_SPU_NUM_LINES }, + { "region-size", required_argument, NULL, OPTION_SPU_LINE_SIZE }, { "fixed-space", required_argument, NULL, OPTION_SPU_FIXED_SPACE }, { "reserved-space", required_argument, NULL, OPTION_SPU_RESERVED_SPACE }, { "extra-stack-space", required_argument, NULL, OPTION_SPU_EXTRA_STACK }, @@ -560,11 +638,16 @@ PARSE_AND_LIST_OPTIONS=' --overlay-rodata Place read-only data with associated function\n\ code in overlays.\n\ --num-regions Number of overlay buffers (default 1).\n\ + --region-size Size of overlay buffers (default 0, auto).\n\ --fixed-space=bytes Local store for non-overlay code and data.\n\ --reserved-space=bytes Local store for stack and heap. If not specified\n\ ld will estimate stack size and assume no heap.\n\ --extra-stack-space=bytes Space for negative sp access (default 2000) if\n\ - --reserved-space not given.\n" + --reserved-space not given.\n\ + --soft-icache Generate software icache overlays.\n\ + --num-lines Number of soft-icache lines (default 32).\n\ + --line-size Size of soft-icache lines (default 1k).\n\ + --lrlive-analysis Scan function prologue for lr liveness.\n" )); ' @@ -624,13 +707,47 @@ PARSE_AND_LIST_ARGS_CASES=' params.auto_overlay |= 4; break; - case OPTION_SPU_NUM_REGIONS: + case OPTION_SPU_SOFT_ICACHE: + params.ovly_flavour = ovly_soft_icache; + if (!num_lines_set) + params.num_lines = 32; + else if ((params.num_lines & -params.num_lines) != params.num_lines) + einfo (_("%P%F: invalid --num-lines/--num-regions `%u'\''\n"), + params.num_lines); + if (!line_size_set) + params.line_size = 1024; + else if ((params.line_size & -params.line_size) != params.line_size) + einfo (_("%P%F: invalid --line-size/--region-size `%u'\''\n"), + params.line_size); + break; + + case OPTION_SPU_LRLIVE: + params.lrlive_analysis = 1; + break; + + case OPTION_SPU_NUM_LINES: + { + char *end; + params.num_lines = strtoul (optarg, &end, 0); + num_lines_set = 1; + if (*end == 0 + && (params.ovly_flavour != ovly_soft_icache + || (params.num_lines & -params.num_lines) == params.num_lines)) + break; + einfo (_("%P%F: invalid --num-lines/--num-regions `%s'\''\n"), optarg); + } + break; + + case OPTION_SPU_LINE_SIZE: { char *end; - params.num_regions = strtoul (optarg, &end, 0); - if (*end == 0) + params.line_size = strtoul (optarg, &end, 0); + line_size_set = 1; + if (*end == 0 + && (params.ovly_flavour != ovly_soft_icache + || (params.line_size & -params.line_size) == params.line_size)) break; - einfo (_("%P%F: invalid --num-regions `%s'\''\n"), optarg); + einfo (_("%P%F: invalid --line-size/--region-size `%s'\''\n"), optarg); } break; |