From 252b5132c753830d5fd56823373aed85f2a0db63 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 3 May 1999 07:29:11 +0000 Subject: 19990502 sourceware import --- ld/emultempl/beos.em | 837 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 837 insertions(+) create mode 100644 ld/emultempl/beos.em (limited to 'ld/emultempl/beos.em') diff --git a/ld/emultempl/beos.em b/ld/emultempl/beos.em new file mode 100644 index 0000000..c2b3ec2 --- /dev/null +++ b/ld/emultempl/beos.em @@ -0,0 +1,837 @@ +# This shell script emits a C file. -*- C -*- +# It does some substitutions. +cat >e${EMULATION_NAME}.c <children); + + for (j = 0; init[j].ptr; j++) + { + long val = init[j].value; + lang_add_assignment (exp_assop ('=' ,init[j].symbol, exp_intop (val))); + if (init[j].size == sizeof(short)) + *(short *)init[j].ptr = val; + else if (init[j].size == sizeof(int)) + *(int *)init[j].ptr = val; + else if (init[j].size == sizeof(long)) + *(long *)init[j].ptr = val; + /* This might be a long long or other special type. */ + else if (init[j].size == sizeof(bfd_vma)) + *(bfd_vma *)init[j].ptr = val; + else abort(); + } + /* Restore the pointer. */ + stat_ptr = save; + + if (pe.FileAlignment > + pe.SectionAlignment) + { + einfo ("%P: warning, file alignment > section alignment.\n"); + } +} + +static void +gld_${EMULATION_NAME}_after_open() +{ + /* Pass the wacky PE command line options into the output bfd. + FIXME: This should be done via a function, rather than by + including an internal BFD header. */ + if (!coff_data(output_bfd)->pe) + { + einfo ("%F%P: PE operations on non PE file.\n"); + } + + pe_data(output_bfd)->pe_opthdr = pe; + pe_data(output_bfd)->dll = init[DLLOFF].value; + +} + +/* Callback functions for qsort in sort_sections. */ + +static int +sort_by_file_name (a, b) + void *a; + void *b; +{ + lang_statement_union_type **ra = a; + lang_statement_union_type **rb = b; + int i, a_sec, b_sec; + + i = strcmp ((*ra)->input_section.ifile->the_bfd->my_archive->filename, + (*rb)->input_section.ifile->the_bfd->my_archive->filename); + if (i != 0) + return i; + + i = strcmp ((*ra)->input_section.ifile->filename, + (*rb)->input_section.ifile->filename); + if (i != 0) + return i; + /* the tail idata4/5 are the only ones without relocs to an + idata$6 section unless we are importing by ordinal, + so sort them to last to terminate the IAT + and HNT properly. if no reloc this one is import by ordinal + so we have to sort by section contents */ + + if ( ((*ra)->input_section.section->reloc_count + (*rb)->input_section.section->reloc_count) ) + { + i = (((*ra)->input_section.section->reloc_count > + (*rb)->input_section.section->reloc_count) ? -1 : 0); + if ( i != 0) + return i; + + return (((*ra)->input_section.section->reloc_count > + (*rb)->input_section.section->reloc_count) ? 0 : 1); + } + else + { + if ( (strcmp( (*ra)->input_section.section->name, ".idata$6") == 0) ) + return 0; /* don't sort .idata$6 or .idata$7 FIXME dlltool eliminate .idata$7 */ + + if (! bfd_get_section_contents ((*ra)->input_section.ifile->the_bfd, + (*ra)->input_section.section, &a_sec, (file_ptr) 0, (bfd_size_type)sizeof(a_sec))) + einfo ("%F%B: Can't read contents of section .idata: %E\n", + (*ra)->input_section.ifile->the_bfd); + + if (! bfd_get_section_contents ((*rb)->input_section.ifile->the_bfd, + (*rb)->input_section.section, &b_sec, (file_ptr) 0, (bfd_size_type)sizeof(b_sec) )) + einfo ("%F%B: Can't read contents of section .idata: %E\n", + (*rb)->input_section.ifile->the_bfd); + + i = ((a_sec < b_sec) ? -1 : 0); + if ( i != 0) + return i; + return ((a_sec < b_sec) ? 0 : 1); + } +return 0; +} + +static int +sort_by_section_name (a, b) + void *a; + void *b; +{ + lang_statement_union_type **ra = a; + lang_statement_union_type **rb = b; + int i; + i = strcmp ((*ra)->input_section.section->name, + (*rb)->input_section.section->name); +/* this is a hack to make .stab and .stabstr last, so we don't have + to fix strip/objcopy for .reloc sections. + FIXME stripping images with a .rsrc section still needs to be fixed */ + if ( i != 0) + { + if ((strncmp ((*ra)->input_section.section->name, ".stab", 5) == 0) + && (strncmp ((*rb)->input_section.section->name, ".stab", 5) != 0)) + return 1; + return i; + } + return i; +} + +/* Subroutine of sort_sections to a contiguous subset of a list of sections. + NEXT_AFTER is the element after the last one to sort. + The result is a pointer to the last element's "next" pointer. */ + +static lang_statement_union_type ** +sort_sections_1 (startptr, next_after, count, sort_func) + lang_statement_union_type **startptr,*next_after; + int count; + int (*sort_func) (); +{ + lang_statement_union_type **vec; + lang_statement_union_type *p; + int i; + lang_statement_union_type **ret; + + if (count == 0) + return startptr; + + vec = ((lang_statement_union_type **) + xmalloc (count * sizeof (lang_statement_union_type *))); + + for (p = *startptr, i = 0; i < count; i++, p = p->next) + vec[i] = p; + + qsort (vec, count, sizeof (vec[0]), sort_func); + + /* Fill in the next pointers again. */ + *startptr = vec[0]; + for (i = 0; i < count - 1; i++) + vec[i]->header.next = vec[i + 1]; + vec[i]->header.next = next_after; + ret = &vec[i]->header.next; + free (vec); + return ret; +} + +/* Sort the .idata\$foo input sections of archives into filename order. + The reason is so dlltool can arrange to have the pe dll import information + generated correctly - the head of the list goes into dh.o, the tail into + dt.o, and the guts into ds[nnnn].o. Note that this is only needed for the + .idata section. + FIXME: This may no longer be necessary with grouped sections. Instead of + sorting on dh.o, ds[nnnn].o, dt.o, one could, for example, have dh.o use + .idata\$4h, have ds[nnnn].o use .idata\$4s[nnnn], and have dt.o use .idata\$4t. + This would have to be elaborated upon to handle multiple dll's + [assuming such an eloboration is possible of course]. + + We also sort sections in '\$' wild statements. These are created by the + place_orphans routine to implement grouped sections. */ + +static void +sort_sections (s) + lang_statement_union_type *s; +{ + for (; s ; s = s->next) + switch (s->header.type) + { + case lang_output_section_statement_enum: + sort_sections (s->output_section_statement.children.head); + break; + case lang_wild_statement_enum: + { + lang_statement_union_type **p = &s->wild_statement.children.head; + + /* Is this the .idata section? */ + if (s->wild_statement.section_name != NULL + && strncmp (s->wild_statement.section_name, ".idata", 6) == 0) + { + /* Sort the children. We want to sort any objects in + the same archive. In order to handle the case of + including a single archive multiple times, we sort + all the children by archive name and then by object + name. After sorting them, we re-thread the pointer + chain. */ + + while (*p) + { + lang_statement_union_type *start = *p; + if (start->header.type != lang_input_section_enum + || !start->input_section.ifile->the_bfd->my_archive) + p = &(start->header.next); + else + { + lang_statement_union_type *end; + int count; + + for (end = start, count = 0; + end && end->header.type == lang_input_section_enum; + end = end->next) + count++; + + p = sort_sections_1 (p, end, count, sort_by_file_name); + } + } + break; + } + + /* If this is a collection of grouped sections, sort them. + The linker script must explicitly mention "*(.foo\$)" or + "*(.foo\$*)". Don't sort them if \$ is not the last + character (not sure if this is really useful, but it + allows explicitly mentioning some \$ sections and letting + the linker handle the rest). */ + if (s->wild_statement.section_name != NULL) + { + char *q = strchr (s->wild_statement.section_name, '\$'); + + if (q != NULL + && (q[1] == '\0' + || (q[1] == '*' && q[2] == '\0'))) + { + lang_statement_union_type *end; + int count; + + for (end = *p, count = 0; end; end = end->next) + { + if (end->header.type != lang_input_section_enum) + abort (); + count++; + } + (void) sort_sections_1 (p, end, count, sort_by_section_name); + } + break; + } + } + break; + default: + break; + } +} + +static void +gld_${EMULATION_NAME}_before_allocation() +{ + extern lang_statement_list_type *stat_ptr; + +#ifdef TARGET_IS_ppcpe + /* Here we rummage through the found bfds to collect toc information */ + { + LANG_FOR_EACH_INPUT_STATEMENT (is) + { + if (!ppc_process_before_allocation(is->the_bfd, &link_info)) + { + einfo("Errors encountered processing file %s\n", is->filename); + } + } + } + + /* We have seen it all. Allocate it, and carry on */ + ppc_allocate_toc_section (&link_info); +#else +#ifdef TARGET_IS_armpe + /* FIXME: we should be able to set the size of the interworking stub + section. + + Here we rummage through the found bfds to collect glue + information. FIXME: should this be based on a command line + option? krk@cygnus.com */ + { + LANG_FOR_EACH_INPUT_STATEMENT (is) + { + if (!arm_process_before_allocation (is->the_bfd, & link_info)) + { + einfo ("Errors encountered processing file %s", is->filename); + } + } + } + + /* We have seen it all. Allocate it, and carry on */ + arm_allocate_interworking_sections (& link_info); +#endif /* TARGET_IS_armpe */ +#endif /* TARGET_IS_ppcpe */ + + sort_sections (stat_ptr->head); +} + +/* Place an orphan section. We use this to put sections with a '\$' in them + into the right place. Any section with a '\$' in them (e.g. .text\$foo) + gets mapped to the output section with everything from the '\$' on stripped + (e.g. .text). + See the Microsoft Portable Executable and Common Object File Format + Specification 4.1, section 4.2, Grouped Sections. + + FIXME: This is now handled by the linker script using wildcards, + but I'm leaving this here in case we want to enable it for sections + which are not mentioned in the linker script. */ + +/*ARGSUSED*/ +static boolean +gld${EMULATION_NAME}_place_orphan (file, s) + lang_input_statement_type *file; + asection *s; +{ + const char *secname; + char *output_secname, *ps; + lang_output_section_statement_type *os; + lang_statement_union_type *l; + + if ((s->flags & SEC_ALLOC) == 0) + return false; + + /* Don't process grouped sections unless doing a final link. + If they're marked as COMDAT sections, we don't want .text\$foo to + end up in .text and then have .text disappear because it's marked + link-once-discard. */ + if (link_info.relocateable) + return false; + + secname = bfd_get_section_name (s->owner, s); + + /* Everything from the '\$' on gets deleted so don't allow '\$' as the + first character. */ + if (*secname == '\$') + einfo ("%P%F: section %s has '\$' as first character\n", secname); + if (strchr (secname + 1, '\$') == NULL) + return false; + + /* Look up the output section. The Microsoft specs say sections names in + image files never contain a '\$'. Fortunately, lang_..._lookup creates + the section if it doesn't exist. */ + output_secname = buystring (secname); + ps = strchr (output_secname + 1, '\$'); + *ps = 0; + os = lang_output_section_statement_lookup (output_secname); + + /* Find the '\$' wild statement for this section. We currently require the + linker script to explicitly mention "*(.foo\$)". + FIXME: ppcpe.sc has .CRT\$foo in the .rdata section. According to the + Microsoft docs this isn't correct so it's not (currently) handled. */ + + ps[0] = '\$'; + ps[1] = 0; + for (l = os->children.head; l; l = l->next) + { + if (l->header.type == lang_wild_statement_enum + && strcmp (l->wild_statement.section_name, output_secname) == 0) + break; + } + ps[0] = 0; + if (l == NULL) +#if 1 + einfo ("%P%F: *(%s\$) missing from linker script\n", output_secname); +#else /* FIXME: This block is untried. It exists to convey the intent, + should one decide to not require *(.foo\$) to appear in the linker + script. */ + { + lang_wild_statement_type *new = new_stat (lang_wild_statement, + &os->children); + new->section_name = xmalloc (strlen (output_secname) + 2); + sprintf (new->section_name, "%s\$", output_secname); + new->filename = NULL; + lang_list_init (&new->children); + l = new; + } +#endif + + /* Link the input section in and we're done for now. + The sections still have to be sorted, but that has to wait until + all such sections have been processed by us. The sorting is done by + sort_sections. */ + wild_doit (&l->wild_statement.children, s, os, file); + + return true; +} + +static char * +gld_${EMULATION_NAME}_get_script(isfile) + int *isfile; +EOF +# Scripts compiled in. +# sed commands to quote an ld script as a C string. +sc="-f ${srcdir}/emultempl/stringify.sed" + +cat >>e${EMULATION_NAME}.c <> e${EMULATION_NAME}.c +echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c +echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c +echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c +echo ' ; else return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c +echo '; }' >> e${EMULATION_NAME}.c + +cat >>e${EMULATION_NAME}.c <