mirror of
https://github.com/darlinghq/darling-gdb.git
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* scripttempl/pe.sc: Use SORT to sort sections appropriately.
* emultempl/pe.em (sort_by_file_name): Remove.
(sort_by_section_name): Remove.
(sort_sections_1, sort_sections): Remove.
(gld_${EMULATION_NAME}_before_allocation): Don't call
sort_sections.
(hold_section, hold_section_name): New static variables.
(hold_use, hold_text, hold_rdata, hold_data, hold_bss): Likewise.
(gld_${EMULATION_NAME}_place_orphan): Rewrite. Look for a good
place to put the section. Align the section. Sort the input
sections by name.
(gld_${EMULATION_NAME}_place_section): New static function.
This commit is contained in:
Ian Lance Taylor
parent
6ccce8e82b
commit
7617a82283
@ -52,18 +52,11 @@ static void gld_${EMULATION_NAME}_after_parse PARAMS ((void));
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static void gld_${EMULATION_NAME}_before_allocation PARAMS ((void));
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static boolean gld_${EMULATION_NAME}_place_orphan
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PARAMS ((lang_input_statement_type *, asection *));
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static void gld${EMULATION_NAME}_place_section
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PARAMS ((lang_statement_union_type *));
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static char *gld_${EMULATION_NAME}_get_script PARAMS ((int *));
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static int gld_${EMULATION_NAME}_parse_args PARAMS ((int, char **));
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#if 0 /* argument to qsort so don't prototype */
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static int sort_by_file_name PARAMS ((void *, void *));
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static int sort_by_section_name PARAMS ((void *, void *));
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#endif
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static lang_statement_union_type **sort_sections_1
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PARAMS ((lang_statement_union_type **, lang_statement_union_type *, int,
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int (*)()));
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static void sort_sections PARAMS ((lang_statement_union_type *));
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static struct internal_extra_pe_aouthdr pe;
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static int dll;
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static int support_old_code = 0;
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@ -479,173 +472,9 @@ gld_${EMULATION_NAME}_after_open ()
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#endif
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}
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/* Callback functions for qsort in sort_sections. */
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static int
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sort_by_file_name (a, b)
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void *a;
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void *b;
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{
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lang_statement_union_type **ra = a;
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lang_statement_union_type **rb = b;
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int i;
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i = strcmp ((*ra)->input_section.ifile->the_bfd->my_archive->filename,
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(*rb)->input_section.ifile->the_bfd->my_archive->filename);
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if (i != 0)
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return i;
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return strcmp ((*ra)->input_section.ifile->filename,
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(*rb)->input_section.ifile->filename);
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}
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static int
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sort_by_section_name (a, b)
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void *a;
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void *b;
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{
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lang_statement_union_type **ra = a;
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lang_statement_union_type **rb = b;
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return strcmp ((*ra)->input_section.section->name,
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(*rb)->input_section.section->name);
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}
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/* Subroutine of sort_sections to a contiguous subset of a list of sections.
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NEXT_AFTER is the element after the last one to sort.
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The result is a pointer to the last element's "next" pointer. */
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static lang_statement_union_type **
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sort_sections_1 (startptr, next_after, count, sort_func)
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lang_statement_union_type **startptr,*next_after;
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int count;
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int (*sort_func) ();
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{
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lang_statement_union_type **vec;
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lang_statement_union_type *p;
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int i;
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lang_statement_union_type **ret;
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if (count == 0)
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return startptr;
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vec = ((lang_statement_union_type **)
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xmalloc (count * sizeof (lang_statement_union_type *)));
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for (p = *startptr, i = 0; i < count; i++, p = p->next)
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vec[i] = p;
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qsort (vec, count, sizeof (vec[0]), sort_func);
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/* Fill in the next pointers again. */
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*startptr = vec[0];
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for (i = 0; i < count - 1; i++)
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vec[i]->header.next = vec[i + 1];
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vec[i]->header.next = next_after;
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ret = &vec[i]->header.next;
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free (vec);
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return ret;
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}
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/* Sort the .idata\$foo input sections of archives into filename order.
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The reason is so dlltool can arrange to have the pe dll import information
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generated correctly - the head of the list goes into dh.o, the tail into
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dt.o, and the guts into ds[nnnn].o. Note that this is only needed for the
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.idata section.
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FIXME: This may no longer be necessary with grouped sections. Instead of
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sorting on dh.o, ds[nnnn].o, dt.o, one could, for example, have dh.o use
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.idata\$4h, have ds[nnnn].o use .idata\$4s[nnnn], and have dt.o use .idata\$4t.
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This would have to be elaborated upon to handle multiple dll's
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[assuming such an eloboration is possible of course].
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We also sort sections in '\$' wild statements. These are created by the
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place_orphans routine to implement grouped sections. */
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static void
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sort_sections (s)
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lang_statement_union_type *s;
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{
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for (; s ; s = s->next)
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switch (s->header.type)
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{
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case lang_output_section_statement_enum:
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sort_sections (s->output_section_statement.children.head);
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break;
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case lang_wild_statement_enum:
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{
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lang_statement_union_type **p = &s->wild_statement.children.head;
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/* Is this the .idata section? */
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if (s->wild_statement.section_name != NULL
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&& strncmp (s->wild_statement.section_name, ".idata", 6) == 0)
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{
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/* Sort the children. We want to sort any objects in
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the same archive. In order to handle the case of
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including a single archive multiple times, we sort
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all the children by archive name and then by object
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name. After sorting them, we re-thread the pointer
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chain. */
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while (*p)
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{
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lang_statement_union_type *start = *p;
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if (start->header.type != lang_input_section_enum
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|| !start->input_section.ifile->the_bfd->my_archive)
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p = &(start->header.next);
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else
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{
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lang_statement_union_type *end;
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int count;
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for (end = start, count = 0;
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end && end->header.type == lang_input_section_enum;
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end = end->next)
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count++;
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p = sort_sections_1 (p, end, count, sort_by_file_name);
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}
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}
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break;
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}
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/* If this is a collection of grouped sections, sort them.
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The linker script must explicitly mention "*(.foo\$)" or
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"*(.foo\$*)". Don't sort them if \$ is not the last
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character (not sure if this is really useful, but it
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allows explicitly mentioning some \$ sections and letting
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the linker handle the rest). */
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if (s->wild_statement.section_name != NULL)
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{
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char *q = strchr (s->wild_statement.section_name, '\$');
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if (q != NULL
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&& (q[1] == '\0'
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|| (q[1] == '*' && q[2] == '\0')))
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{
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lang_statement_union_type *end;
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int count;
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for (end = *p, count = 0; end; end = end->next)
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{
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if (end->header.type != lang_input_section_enum)
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abort ();
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count++;
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}
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(void) sort_sections_1 (p, end, count, sort_by_section_name);
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}
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break;
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}
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}
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break;
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default:
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break;
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}
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}
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static void
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gld_${EMULATION_NAME}_before_allocation()
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{
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extern lang_statement_list_type *stat_ptr;
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#ifdef TARGET_IS_ppcpe
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/* Here we rummage through the found bfds to collect toc information */
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{
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@ -686,20 +515,31 @@ gld_${EMULATION_NAME}_before_allocation()
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/* We have seen it all. Allocate it, and carry on */
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bfd_arm_allocate_interworking_sections (& link_info);
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#endif /* TARGET_IS_armpe */
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sort_sections (stat_ptr->head);
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}
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/* Place an orphan section. We use this to put sections with a '\$' in them
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into the right place. Any section with a '\$' in them (e.g. .text\$foo)
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gets mapped to the output section with everything from the '\$' on stripped
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(e.g. .text).
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See the Microsoft Portable Executable and Common Object File Format
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Specification 4.1, section 4.2, Grouped Sections.
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/* Place an orphan section.
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FIXME: This is now handled by the linker script using wildcards,
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but I'm leaving this here in case we want to enable it for sections
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which are not mentioned in the linker script. */
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We use this to put sections in a reasonable place in the file, and
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to ensure that they are aligned as required.
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We handle grouped sections here as well. A section named .foo$nn
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goes into the output section .foo. All grouped sections are sorted
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by name.
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Grouped sections for the default sections are handled by the
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default linker script using wildcards, and are sorted by
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sort_sections. */
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static asection *hold_section;
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static char *hold_section_name;
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static lang_output_section_statement_type *hold_use;
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static lang_output_section_statement_type *hold_text;
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static lang_output_section_statement_type *hold_rdata;
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static lang_output_section_statement_type *hold_data;
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static lang_output_section_statement_type *hold_bss;
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/* Place an orphan section. We use this to put random SHF_ALLOC
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sections in the right segment. */
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/*ARGSUSED*/
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static boolean
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@ -708,76 +548,207 @@ gld_${EMULATION_NAME}_place_orphan (file, s)
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asection *s;
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{
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const char *secname;
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char *output_secname, *ps;
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lang_output_section_statement_type *os;
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lang_statement_union_type *l;
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char *dollar;
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if ((s->flags & SEC_ALLOC) == 0)
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return false;
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/* Don't process grouped sections unless doing a final link.
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If they're marked as COMDAT sections, we don't want .text\$foo to
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end up in .text and then have .text disappear because it's marked
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link-once-discard. */
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if (link_info.relocateable)
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return false;
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secname = bfd_get_section_name (s->owner, s);
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/* Everything from the '\$' on gets deleted so don't allow '\$' as the
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first character. */
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if (*secname == '\$')
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einfo ("%P%F: section %s has '\$' as first character\n", secname);
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if (strchr (secname + 1, '\$') == NULL)
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return false;
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/* Look through the script to see where to place this section. */
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/* Look up the output section. The Microsoft specs say sections names in
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image files never contain a '\$'. Fortunately, lang_..._lookup creates
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the section if it doesn't exist. */
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output_secname = buystring (secname);
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ps = strchr (output_secname + 1, '\$');
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*ps = 0;
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os = lang_output_section_statement_lookup (output_secname);
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hold_section = s;
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/* Find the '\$' wild statement for this section. We currently require the
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linker script to explicitly mention "*(.foo\$)".
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FIXME: ppcpe.sc has .CRT\$foo in the .rdata section. According to the
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Microsoft docs this isn't correct so it's not (currently) handled. */
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hold_section_name = xstrdup (secname);
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dollar = strchr (hold_section_name, '$');
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if (dollar != NULL)
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*dollar = '\0';
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ps[0] = '\$';
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ps[1] = 0;
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for (l = os->children.head; l; l = l->next)
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hold_use = NULL;
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lang_for_each_statement (gld${EMULATION_NAME}_place_section);
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if (hold_use == NULL)
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{
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if (l->header.type == lang_wild_statement_enum
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&& strcmp (l->wild_statement.section_name, output_secname) == 0)
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break;
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}
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ps[0] = 0;
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if (l == NULL)
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#if 1
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einfo ("%P%F: *(%s\$) missing from linker script\n", output_secname);
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#else /* FIXME: This block is untried. It exists to convey the intent,
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should one decide to not require *(.foo\$) to appear in the linker
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script. */
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{
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lang_wild_statement_type *new = new_stat (lang_wild_statement,
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&os->children);
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new->section_name = xmalloc (strlen (output_secname) + 2);
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sprintf (new->section_name, "%s\$", output_secname);
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new->filename = NULL;
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lang_list_init (&new->children);
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l = new;
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}
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#endif
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lang_output_section_statement_type *place;
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char *outsecname;
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asection *snew, **pps;
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lang_statement_list_type *old;
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lang_statement_list_type add;
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etree_type *address;
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/* Link the input section in and we're done for now.
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The sections still have to be sorted, but that has to wait until
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all such sections have been processed by us. The sorting is done by
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sort_sections. */
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wild_doit (&l->wild_statement.children, s, os, file);
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/* Try to put the new output section in a reasonable place based
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on the section name and section flags. */
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place = NULL;
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if ((s->flags & SEC_HAS_CONTENTS) == 0
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&& hold_bss != NULL)
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place = hold_bss;
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else if ((s->flags & SEC_READONLY) == 0
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&& hold_data != NULL)
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place = hold_data;
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else if ((s->flags & SEC_CODE) == 0
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&& (s->flags & SEC_READONLY) != 0
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&& hold_rdata != NULL)
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place = hold_rdata;
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else if ((s->flags & SEC_READONLY) != 0
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&& hold_text != NULL)
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place = hold_text;
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/* Choose a unique name for the section. This will be needed if
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the same section name appears in the input file with
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different loadable or allocateable characteristics. */
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outsecname = xstrdup (hold_section_name);
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if (bfd_get_section_by_name (output_bfd, outsecname) != NULL)
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{
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unsigned int len;
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char *newname;
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unsigned int i;
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len = strlen (outsecname);
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newname = xmalloc (len + 5);
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strcpy (newname, outsecname);
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i = 0;
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do
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{
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sprintf (newname + len, "%d", i);
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++i;
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}
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while (bfd_get_section_by_name (output_bfd, newname) != NULL);
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free (outsecname);
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outsecname = newname;
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}
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/* We don't want to free OUTSECNAME, as it may get attached to
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the output section statement. */
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/* Create the section in the output file, and put it in the
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right place. This shuffling is to make the output file look
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neater. */
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snew = bfd_make_section (output_bfd, outsecname);
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if (snew == NULL)
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einfo ("%P%F: output format %s cannot represent section called %s\n",
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output_bfd->xvec->name, outsecname);
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if (place != NULL && place->bfd_section != NULL)
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{
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for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
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;
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*pps = snew->next;
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snew->next = place->bfd_section->next;
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place->bfd_section->next = snew;
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}
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/* Start building a list of statements for this section. */
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old = stat_ptr;
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stat_ptr = &add;
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lang_list_init (stat_ptr);
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if (link_info.relocateable)
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address = NULL;
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else
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{
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/* All sections in an executable must be aligned to a page
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boundary. */
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address = exp_unop (ALIGN_K,
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exp_nameop (NAME, "__section_alignment__"));
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}
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lang_enter_output_section_statement (outsecname, address, 0,
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(bfd_vma) 0,
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(etree_type *) NULL,
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(etree_type *) NULL,
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(etree_type *) NULL);
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hold_use = lang_output_section_statement_lookup (outsecname);
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lang_leave_output_section_statement
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((bfd_vma) 0, "*default*",
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(struct lang_output_section_phdr_list *) NULL);
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/* Now stick the new statement list right after PLACE. */
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if (place != NULL)
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{
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*add.tail = place->header.next;
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place->header.next = add.head;
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}
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stat_ptr = old;
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}
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if (dollar == NULL)
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wild_doit (&hold_use->children, s, hold_use, file);
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else
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{
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lang_statement_union_type **pl;
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boolean found_dollar;
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lang_statement_list_type list;
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/* The section name has a '$'. Sort it with the other '$'
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sections. */
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found_dollar = false;
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for (pl = &hold_use->children.head; *pl != NULL; pl = &(*pl)->next)
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{
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lang_input_section_type *ls;
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const char *lname;
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if ((*pl)->header.type != lang_input_section_enum)
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continue;
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ls = &(*pl)->input_section;
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lname = bfd_get_section_name (ls->ifile->the_bfd, ls->section);
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if (strchr (lname, '$') == NULL)
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{
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if (found_dollar)
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break;
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}
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else
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{
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found_dollar = true;
|
||||
if (strcmp (secname, lname) < 0)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
lang_list_init (&list);
|
||||
wild_doit (&list, s, hold_use, file);
|
||||
ASSERT (list.head != NULL && list.head->next == NULL);
|
||||
|
||||
list.head->next = *pl;
|
||||
*pl = list.head;
|
||||
}
|
||||
|
||||
free (hold_section_name);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static void
|
||||
gld${EMULATION_NAME}_place_section (s)
|
||||
lang_statement_union_type *s;
|
||||
{
|
||||
lang_output_section_statement_type *os;
|
||||
|
||||
if (s->header.type != lang_output_section_statement_enum)
|
||||
return;
|
||||
|
||||
os = &s->output_section_statement;
|
||||
|
||||
if (strcmp (os->name, hold_section_name) == 0
|
||||
&& os->bfd_section != NULL
|
||||
&& ((hold_section->flags & (SEC_LOAD | SEC_ALLOC))
|
||||
== (os->bfd_section->flags & (SEC_LOAD | SEC_ALLOC))))
|
||||
hold_use = os;
|
||||
|
||||
if (strcmp (os->name, ".text") == 0)
|
||||
hold_text = os;
|
||||
else if (strcmp (os->name, ".rdata") == 0)
|
||||
hold_rdata = os;
|
||||
else if (strcmp (os->name, ".data") == 0)
|
||||
hold_data = os;
|
||||
else if (strcmp (os->name, ".bss") == 0)
|
||||
hold_bss = os;
|
||||
}
|
||||
|
||||
static char *
|
||||
gld_${EMULATION_NAME}_get_script(isfile)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user