* emultempl/mmo.em (mmo_place_orphan): Rewrite to also attach
orphan sections to .data and .bss output sections, not just .text. When giving up on finding a suitable output section, attach to any output section other than .MMIX.reg_contents, if it exists. * scripttempl/mmo.sc: Move output debug sections to just before .MMIX.reg_contents. Add .gnu.attributes. Add new . = . NOP assignments and move end-of-section provide-symbols after them to force the end-of-section symbols to the address after orphan placement. Add SORT_NONE to .init and .fini sections.
This commit is contained in:
parent
e81fea4d17
commit
a9ae0bdaba
12
ld/ChangeLog
12
ld/ChangeLog
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@ -1,3 +1,15 @@
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2012-09-09 Hans-Peter Nilsson <hp@bitrange.com>
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* emultempl/mmo.em (mmo_place_orphan): Rewrite to also attach
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orphan sections to .data and .bss output sections, not just .text.
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When giving up on finding a suitable output section, attach to any
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output section other than .MMIX.reg_contents, if it exists.
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* scripttempl/mmo.sc: Move output debug sections to just before
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.MMIX.reg_contents. Add .gnu.attributes. Add new . = . NOP
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assignments and move end-of-section provide-symbols after them
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to force the end-of-section symbols to the address after orphan
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placement. Add SORT_NONE to .init and .fini sections.
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2012-08-30 H.J. Lu <hongjiu.lu@intel.com>
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2012-08-30 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/14525
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PR ld/14525
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@ -53,22 +53,49 @@ mmo_place_orphan (asection *s,
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const char *secname,
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const char *secname,
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int constraint ATTRIBUTE_UNUSED)
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int constraint ATTRIBUTE_UNUSED)
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{
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{
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static struct orphan_save hold_text =
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static struct
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{
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flagword nonzero_flags;
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struct orphan_save orphansave;
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} holds[] =
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{
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{
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SEC_CODE | SEC_READONLY,
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{
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{
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MMO_TEXT_SECTION_NAME,
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MMO_TEXT_SECTION_NAME,
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SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
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SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,
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0, 0, 0, 0
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0, 0, 0, 0
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}
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},
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{
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SEC_LOAD | SEC_DATA,
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{
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MMO_DATA_SECTION_NAME,
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SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,
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0, 0, 0, 0
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}
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},
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{
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SEC_ALLOC,
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{
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".bss",
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SEC_ALLOC,
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0, 0, 0, 0
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}
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}
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};
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};
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struct orphan_save *place;
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struct orphan_save *place = NULL;
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lang_output_section_statement_type *after;
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lang_output_section_statement_type *after;
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lang_output_section_statement_type *os;
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lang_output_section_statement_type *os;
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size_t i;
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/* We have nothing to say for anything other than a final link. */
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/* We have nothing to say for anything other than a final link or
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for sections that are excluded. */
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if (link_info.relocatable
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if (link_info.relocatable
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|| (s->flags & (SEC_EXCLUDE | SEC_LOAD)) != SEC_LOAD)
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|| (s->flags & SEC_EXCLUDE) != 0)
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return NULL;
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return NULL;
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/* Only care for sections we're going to load. */
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os = lang_output_section_find (secname);
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os = lang_output_section_find (secname);
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/* We have an output section by this name. Place the section inside it
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/* We have an output section by this name. Place the section inside it
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@ -79,31 +106,66 @@ mmo_place_orphan (asection *s,
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return os;
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return os;
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}
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}
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/* If this section does not have .text-type section flags or there's no
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/* Check for matching section type flags for sections we care about.
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MMO_TEXT_SECTION_NAME, we don't have anything to say. */
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A section without contents can have SEC_LOAD == 0, but we still
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if ((s->flags & (SEC_CODE | SEC_READONLY)) == 0)
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want it attached to a sane section so the symbols appear as
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expected. */
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if ((s->flags & (SEC_ALLOC | SEC_READONLY)) != SEC_READONLY)
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for (i = 0; i < sizeof (holds) / sizeof (holds[0]); i++)
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if ((s->flags & holds[i].nonzero_flags) != 0)
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{
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place = &holds[i].orphansave;
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if (place->os == NULL)
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place->os = lang_output_section_find (place->name);
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break;
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}
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if (place == NULL)
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{
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/* For other combinations, we have to give up, except we make
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sure not to place the orphan section after the
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linker-generated register section; that'd make it continue
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the reg section and we never want that to happen for orphan
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sections. */
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lang_output_section_statement_type *before;
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lang_output_section_statement_type *lookup;
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static struct orphan_save hold_nonreg =
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{
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NULL,
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SEC_READONLY,
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0, 0, 0, 0
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};
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if (hold_nonreg.os == NULL)
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{
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before = lang_output_section_find (MMIX_REG_CONTENTS_SECTION_NAME);
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/* If we have no such section, all fine; we don't care where
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it's placed. */
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if (before == NULL)
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return NULL;
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return NULL;
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if (hold_text.os == NULL)
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/* We have to find the oss before this one, so we can use that as
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hold_text.os = lang_output_section_find (hold_text.name);
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"after". */
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for (lookup = &lang_output_section_statement.head->output_section_statement;
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lookup != NULL && lookup->next != before;
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lookup = lookup->next)
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;
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place = &hold_text;
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hold_nonreg.os = lookup;
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if (hold_text.os != NULL)
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}
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after = hold_text.os;
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else
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after = &lang_output_section_statement.head->output_section_statement;
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/* If there's an output section by this name, we'll use it, regardless
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place = &hold_nonreg;
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of section flags, in contrast to what's done in elf32.em. */
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}
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after = place->os;
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if (after == NULL)
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return NULL;
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/* If there's an output section by *this* name, we'll use it, regardless
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of actual section flags, in contrast to what's done in elf32.em. */
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os = lang_insert_orphan (s, secname, 0, after, place, NULL, NULL);
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os = lang_insert_orphan (s, secname, 0, after, place, NULL, NULL);
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/* We need an output section for .text as a root, so if there was none
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(might happen with a peculiar linker script such as in "map
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addresses", map-address.exp), we grab the output section created
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above. */
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if (hold_text.os == NULL)
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hold_text.os = os;
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return os;
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return os;
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}
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}
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@ -20,12 +20,12 @@ SECTIONS
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/* FIXME: Move .init, .fini, .ctors and .dtors to their own sections. */
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/* FIXME: Move .init, .fini, .ctors and .dtors to their own sections. */
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${RELOCATING+ PROVIDE (_init_start = .);}
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${RELOCATING+ PROVIDE (_init_start = .);}
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${RELOCATING+ PROVIDE (_init = .);}
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${RELOCATING+ PROVIDE (_init = .);}
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${RELOCATING+ KEEP (*(.init))}
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${RELOCATING+ KEEP (*(SORT_NONE(.init)))}
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${RELOCATING+ PROVIDE (_init_end = .);}
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${RELOCATING+ PROVIDE (_init_end = .);}
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${RELOCATING+ PROVIDE (_fini_start = .);}
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${RELOCATING+ PROVIDE (_fini_start = .);}
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${RELOCATING+ PROVIDE (_fini = .);}
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${RELOCATING+ PROVIDE (_fini = .);}
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${RELOCATING+ KEEP (*(.fini))}
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${RELOCATING+ KEEP (*(SORT_NONE(.fini)))}
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${RELOCATING+ PROVIDE (_fini_end = .);}
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${RELOCATING+ PROVIDE (_fini_end = .);}
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/* FIXME: Align ctors, dtors, ehframe. */
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/* FIXME: Align ctors, dtors, ehframe. */
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@ -57,11 +57,54 @@ SECTIONS
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${RELOCATING+KEEP (*(.eh_frame))}
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${RELOCATING+KEEP (*(.eh_frame))}
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${RELOCATING+*(.gcc_except_table)}
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${RELOCATING+*(.gcc_except_table)}
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${RELOCATING+Main = DEFINED (Main) ? Main : (DEFINED (_start) ? _start : ADDR (.text));}
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}
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/* The following NOP assignment and those after .data and .bss, are
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necessary to get orphan sections adopted by the .text inserted before
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the following end-section symbols. An output section would also serve
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this purpose, but we can't do that. */
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. = .;
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${RELOCATING+ PROVIDE(etext = .);}
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${RELOCATING+ PROVIDE(etext = .);}
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${RELOCATING+ PROVIDE(_etext = .);}
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${RELOCATING+ PROVIDE(_etext = .);}
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${RELOCATING+ PROVIDE(__etext = .);}
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${RELOCATING+ PROVIDE(__etext = .);}
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${RELOCATING+Main = DEFINED (Main) ? Main : (DEFINED (_start) ? _start : ADDR (.text));}
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.data ${RELOCATING+ ${DATA_ADDR}}:
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{
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${RELOCATING+ PROVIDE(__Sdata = .);}
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*(.data);
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${RELOCATING+*(.data.*)}
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${RELOCATING+*(.gnu.linkonce.d*)}
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}
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}
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. = .;
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${RELOCATING+ PROVIDE(__Edata = .);}
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/* Deprecated, use __Edata. */
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${RELOCATING+ PROVIDE(edata = .);}
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${RELOCATING+ PROVIDE(_edata = .);}
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${RELOCATING+ PROVIDE(__edata = .);}
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/* At the moment, although perhaps we should, we can't map sections
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without contents to sections *with* contents due to FIXME: a BFD bug.
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Anyway, the mmo back-end ignores sections without contents when
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writing out sections, so this works fine. */
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.bss :
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{
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${RELOCATING+ PROVIDE(__Sbss = .);}
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${RELOCATING+ PROVIDE(__bss_start = .);}
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${RELOCATING+ *(.sbss);}
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${RELOCATING+ *(.bss);}
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${RELOCATING+*(.bss.*)}
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${RELOCATING+ *(COMMON);}
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}
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. = .;
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${RELOCATING+ PROVIDE(__Ebss = .);}
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/* Deprecated, use __Ebss or __Eall as appropriate. */
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${RELOCATING+ PROVIDE(end = .);}
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${RELOCATING+ PROVIDE(_end = .);}
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${RELOCATING+ PROVIDE(__end = .);}
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${RELOCATING+ PROVIDE(__Eall = .);}
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.stab 0 : { *(.stab) }
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stabstr 0 : { *(.stabstr) }
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@ -87,43 +130,6 @@ SECTIONS
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/* DWARF Extension. */
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/* DWARF Extension. */
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.debug_macro 0 : { *(.debug_macro) }
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.debug_macro 0 : { *(.debug_macro) }
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.data ${RELOCATING+ ${DATA_ADDR}}:
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{
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${RELOCATING+ PROVIDE(__Sdata = .);}
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*(.data);
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${RELOCATING+*(.data.*)}
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${RELOCATING+*(.gnu.linkonce.d*)}
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${RELOCATING+ PROVIDE(__Edata = .);}
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/* Deprecated, use __Edata. */
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${RELOCATING+ PROVIDE(edata = .);}
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${RELOCATING+ PROVIDE(_edata = .);}
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${RELOCATING+ PROVIDE(__edata = .);}
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}
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/* At the moment, although perhaps we should, we can't map sections
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without contents to sections *with* contents due to FIXME: a BFD bug.
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Anyway, the mmo back-end ignores sections without contents when
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writing out sections, so this works fine. */
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.bss :
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{
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${RELOCATING+ PROVIDE(__Sbss = .);}
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${RELOCATING+ PROVIDE(__bss_start = .);}
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${RELOCATING+ *(.sbss);}
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${RELOCATING+ *(.bss);}
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${RELOCATING+*(.bss.*)}
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${RELOCATING+ *(COMMON);}
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${RELOCATING+ PROVIDE(__Ebss = .);}
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}
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/* Deprecated, use __Ebss or __Eall as appropriate. */
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${RELOCATING+ PROVIDE(end = .);}
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${RELOCATING+ PROVIDE(_end = .);}
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${RELOCATING+ PROVIDE(__end = .);}
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${RELOCATING+ PROVIDE(__Eall = .);}
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.MMIX.reg_contents :
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.MMIX.reg_contents :
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{
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{
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/* Note that this section always has a fixed VMA - that of its
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/* Note that this section always has a fixed VMA - that of its
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@ -140,5 +146,7 @@ SECTIONS
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It can probably be fixed with some amount of work. */
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It can probably be fixed with some amount of work. */
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/DISCARD/ :
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/DISCARD/ :
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{ ${RELOCATING+ *(.gnu.warning.*);} }
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{ ${RELOCATING+ *(.gnu.warning.*);} }
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.gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
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}
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}
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EOF
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EOF
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