diff options
Diffstat (limited to 'bfd/mmo.c')
| -rw-r--r-- | bfd/mmo.c | 145 |
1 files changed, 118 insertions, 27 deletions
@@ -464,6 +464,10 @@ static bfd_boolean mmo_write_object_contents PARAMS ((bfd *)); static long mmo_canonicalize_reloc PARAMS ((bfd *, sec_ptr, arelent **, asymbol **)); +static bfd_boolean mmo_write_section_description + PARAMS ((bfd *, asection *)); +static bfd_boolean mmo_has_leading_or_trailing_zero_tetra_p + PARAMS ((bfd *, asection *)); /* Global "const" variables initialized once. Must not depend on particular input or caller; put such things into the bfd or elsewhere. @@ -2264,6 +2268,7 @@ mmo_canonicalize_symtab (abfd, alocation) { asection *textsec = bfd_get_section_by_name (abfd, MMO_TEXT_SECTION_NAME); + asection *datasec; if (textsec != NULL && c->value >= textsec->vma @@ -2272,6 +2277,23 @@ mmo_canonicalize_symtab (abfd, alocation) c->section = textsec; c->value -= c->section->vma; } + /* In mmo, symbol types depend on the VMA. Therefore, if + the data section isn't within the usual bounds, its + symbols are marked as absolute. Correct that. This + means we can't have absolute symbols with values matching + data section addresses, but we also can't have with + absolute symbols with values matching text section + addresses. For such needs, use the ELF format. */ + else if ((datasec + = bfd_get_section_by_name (abfd, + MMO_DATA_SECTION_NAME)) + != NULL + && c->value >= datasec->vma + && c->value <= datasec->vma + datasec->size) + { + c->section = datasec; + c->value -= c->section->vma; + } else c->section = bfd_abs_section_ptr; } @@ -2441,6 +2463,27 @@ bfd_sec_flags_from_mmo_flags (flags) return oflags; } +/* Return TRUE iff the leading or trailing tetrabyte in SEC is defined and + is 0. */ + +static bfd_boolean +mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec) + bfd *abfd; + asection *sec; +{ + bfd_vma secaddr = bfd_get_section_vma (abfd, sec); + + if (sec->size < 4) + return FALSE; + + if (bfd_get_32 (abfd, mmo_get_loc (sec, secaddr, 4)) == 0 + && bfd_get_32 (abfd, + mmo_get_loc (sec, secaddr + sec->size - 4, 4)) == 0) + return TRUE; + + return FALSE; +} + /* Write a section. */ static bfd_boolean @@ -2461,10 +2504,44 @@ mmo_internal_write_section (abfd, sec) above. */ if (strcmp (sec->name, MMO_TEXT_SECTION_NAME) == 0) - /* FIXME: Output source file name and line number. */ - return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); + { + bfd_vma secaddr = bfd_get_section_vma (abfd, sec); + + /* Because leading and trailing zeros are omitted in output, we need to + specify the section boundaries so they're correct when the file + is read in again. That's also the case if this section is + specified as not within its usual boundaries or alignments. */ + if (sec->size != 0 + && (secaddr + sec->size >= (bfd_vma) 1 << 56 + || (secaddr & 3) != 0 + || (sec->size & 3) != 0 + || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) + { + if (!mmo_write_section_description (abfd, sec)) + return FALSE; + } + + /* FIXME: Output source file name and line number. */ + return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); + } else if (strcmp (sec->name, MMO_DATA_SECTION_NAME) == 0) - return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); + { + bfd_vma secaddr = bfd_get_section_vma (abfd, sec); + + /* Same goes as for MMO_TEXT_SECTION_NAME above. */ + if (sec->size != 0 + && (secaddr < (bfd_vma) 0x20 << 56 + || secaddr + sec->size >= (bfd_vma) 0x21 << 56 + || (secaddr & 3) != 0 + || (sec->size & 3) != 0 + || mmo_has_leading_or_trailing_zero_tetra_p (abfd, sec))) + { + if (!mmo_write_section_description (abfd, sec)) + return FALSE; + } + + return mmo_write_loc_chunk_list (abfd, mmo_section_data (sec)->head); + } else if (strcmp (sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) /* Not handled here. */ { @@ -2486,7 +2563,31 @@ mmo_internal_write_section (abfd, sec) else if ((bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS) != 0 && sec->size != 0) { - /* Keep the document-comment formatted the way it is. */ + if (!mmo_write_section_description (abfd, sec)) + return FALSE; + + /* Writing a LOP_LOC ends the LOP_SPEC data, and makes data actually + loaded. */ + if (bfd_get_section_flags (abfd, sec) & SEC_LOAD) + return (! abfd->tdata.mmo_data->have_error + && mmo_write_loc_chunk_list (abfd, + mmo_section_data (sec)->head)); + return (! abfd->tdata.mmo_data->have_error + && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); + } + + /* Some section without contents. */ + return TRUE; +} + +/* Write the description of a section, extended-mmo-style. */ + +static bfd_boolean +mmo_write_section_description (abfd, sec) + bfd *abfd; + asection *sec; +{ + /* Keep the following document-comment formatted the way it is. */ /* INODE mmo section mapping, , Symbol-table, mmo @@ -2579,29 +2680,19 @@ EXAMPLE special data. The address is usually unimportant but might provide information for e.g.@: the DWARF 2 debugging format. */ - mmo_write_tetra_raw (abfd, LOP_SPEC_SECTION); - mmo_write_tetra (abfd, (strlen (sec->name) + 3) / 4); - mmo_write_chunk (abfd, sec->name, strlen (sec->name)); - mmo_flush_chunk (abfd); - /* FIXME: We can get debug sections (.debug_line & Co.) with a - section flag still having SEC_RELOC set. Investigate. This - might be true for all alien sections; perhaps mmo.em should clear - that flag. Might be related to weak references. */ - mmo_write_tetra (abfd, - mmo_sec_flags_from_bfd_flags - (bfd_get_section_flags (abfd, sec))); - mmo_write_octa (abfd, sec->size); - mmo_write_octa (abfd, bfd_get_section_vma (abfd, sec)); - - /* Writing a LOP_LOC ends the LOP_SPEC data, and makes data actually - loaded. */ - if (bfd_get_section_flags (abfd, sec) & SEC_LOAD) - return (! abfd->tdata.mmo_data->have_error - && mmo_write_loc_chunk_list (abfd, - mmo_section_data (sec)->head)); - return (! abfd->tdata.mmo_data->have_error - && mmo_write_chunk_list (abfd, mmo_section_data (sec)->head)); - } + mmo_write_tetra_raw (abfd, LOP_SPEC_SECTION); + mmo_write_tetra (abfd, (strlen (sec->name) + 3) / 4); + mmo_write_chunk (abfd, sec->name, strlen (sec->name)); + mmo_flush_chunk (abfd); + /* FIXME: We can get debug sections (.debug_line & Co.) with a section + flag still having SEC_RELOC set. Investigate. This might be true + for all alien sections; perhaps mmo.em should clear that flag. Might + be related to weak references. */ + mmo_write_tetra (abfd, + mmo_sec_flags_from_bfd_flags + (bfd_get_section_flags (abfd, sec))); + mmo_write_octa (abfd, sec->size); + mmo_write_octa (abfd, bfd_get_section_vma (abfd, sec)); return TRUE; } |