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author | Ian Lance Taylor <iant@google.com> | 2008-03-19 21:41:38 +0000 |
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committer | Ian Lance Taylor <iant@google.com> | 2008-03-19 21:41:38 +0000 |
commit | 96a2b4e4bf67a7430e7ddd06a1d0730a49e6b07e (patch) | |
tree | 071317d44af235c3687bd900897968735303ebf2 /gold/output.cc | |
parent | 49a834f99faef9fd60532e6601c33bbeac27142b (diff) | |
download | binutils-96a2b4e4bf67a7430e7ddd06a1d0730a49e6b07e.zip binutils-96a2b4e4bf67a7430e7ddd06a1d0730a49e6b07e.tar.gz binutils-96a2b4e4bf67a7430e7ddd06a1d0730a49e6b07e.tar.bz2 |
Make sure the start and size of the TLS segment are aligned.
Diffstat (limited to 'gold/output.cc')
-rw-r--r-- | gold/output.cc | 87 |
1 files changed, 74 insertions, 13 deletions
diff --git a/gold/output.cc b/gold/output.cc index ba4f6c8..85cc2b2 100644 --- a/gold/output.cc +++ b/gold/output.cc @@ -2483,7 +2483,8 @@ Output_segment::dynamic_reloc_count_list(const Output_data_list* pdl) const // *POFF and *PSHNDX. uint64_t -Output_segment::set_section_addresses(bool reset, uint64_t addr, off_t* poff, +Output_segment::set_section_addresses(const Layout* layout, bool reset, + uint64_t addr, off_t* poff, unsigned int* pshndx) { gold_assert(this->type_ == elfcpp::PT_LOAD); @@ -2500,17 +2501,31 @@ Output_segment::set_section_addresses(bool reset, uint64_t addr, off_t* poff, this->are_addresses_set_ = true; } + bool in_tls = false; + off_t orig_off = *poff; this->offset_ = orig_off; - addr = this->set_section_list_addresses(reset, &this->output_data_, - addr, poff, pshndx); + addr = this->set_section_list_addresses(layout, reset, &this->output_data_, + addr, poff, pshndx, &in_tls); this->filesz_ = *poff - orig_off; off_t off = *poff; - uint64_t ret = this->set_section_list_addresses(reset, &this->output_bss_, - addr, poff, pshndx); + uint64_t ret = this->set_section_list_addresses(layout, reset, + &this->output_bss_, + addr, poff, pshndx, + &in_tls); + + // If the last section was a TLS section, align upward to the + // alignment of the TLS segment, so that the overall size of the TLS + // segment is aligned. + if (in_tls) + { + uint64_t segment_align = layout->tls_segment()->maximum_alignment(); + *poff = align_address(*poff, segment_align); + } + this->memsz_ = *poff - orig_off; // Ignore the file offset adjustments made by the BSS Output_data @@ -2524,9 +2539,11 @@ Output_segment::set_section_addresses(bool reset, uint64_t addr, off_t* poff, // structures. uint64_t -Output_segment::set_section_list_addresses(bool reset, Output_data_list* pdl, +Output_segment::set_section_list_addresses(const Layout* layout, bool reset, + Output_data_list* pdl, uint64_t addr, off_t* poff, - unsigned int* pshndx) + unsigned int* pshndx, + bool* in_tls) { off_t startoff = *poff; @@ -2542,7 +2559,42 @@ Output_segment::set_section_list_addresses(bool reset, Output_data_list* pdl, // already have an address. if (!(*p)->is_address_valid()) { - off = align_address(off, (*p)->addralign()); + uint64_t align = (*p)->addralign(); + + if ((*p)->is_section_flag_set(elfcpp::SHF_TLS)) + { + // Give the first TLS section the alignment of the + // entire TLS segment. Otherwise the TLS segment as a + // whole may be misaligned. + if (!*in_tls) + { + Output_segment* tls_segment = layout->tls_segment(); + gold_assert(tls_segment != NULL); + uint64_t segment_align = tls_segment->maximum_alignment(); + gold_assert(segment_align >= align); + align = segment_align; + + *in_tls = true; + } + } + else + { + // If this is the first section after the TLS segment, + // align it to at least the alignment of the TLS + // segment, so that the size of the overall TLS segment + // is aligned. + if (*in_tls) + { + uint64_t segment_align = + layout->tls_segment()->maximum_alignment(); + if (segment_align > align) + align = segment_align; + + *in_tls = false; + } + } + + off = align_address(off, align); (*p)->set_address_and_file_offset(addr + (off - startoff), off); } else @@ -2555,11 +2607,10 @@ Output_segment::set_section_list_addresses(bool reset, Output_data_list* pdl, (*p)->finalize_data_size(); } - // Unless this is a PT_TLS segment, we want to ignore the size - // of a SHF_TLS/SHT_NOBITS section. Such a section does not - // affect the size of a PT_LOAD segment. - if (this->type_ == elfcpp::PT_TLS - || !(*p)->is_section_flag_set(elfcpp::SHF_TLS) + // We want to ignore the size of a SHF_TLS or SHT_NOBITS + // section. Such a section does not affect the size of a + // PT_LOAD segment. + if (!(*p)->is_section_flag_set(elfcpp::SHF_TLS) || !(*p)->is_section_type(elfcpp::SHT_NOBITS)) off += (*p)->data_size(); @@ -2626,6 +2677,16 @@ Output_segment::set_offset() this->memsz_ = (last->address() + last->data_size() - this->vaddr_); + + // If this is a TLS segment, align the memory size. The code in + // set_section_list ensures that the section after the TLS segment + // is aligned to give us room. + if (this->type_ == elfcpp::PT_TLS) + { + uint64_t segment_align = this->maximum_alignment(); + gold_assert(this->vaddr_ == align_address(this->vaddr_, segment_align)); + this->memsz_ = align_address(this->memsz_, segment_align); + } } // Set the TLS offsets of the sections in the PT_TLS segment. |