#include "dynobj.h"
#include "ehframe.h"
#include "compressed_output.h"
+#include "reduced_debug_output.h"
#include "reloc.h"
+#include "descriptors.h"
#include "layout.h"
+#include "plugin.h"
namespace gold
{
added_eh_frame_data_(false),
eh_frame_hdr_section_(NULL),
build_id_note_(NULL),
+ debug_abbrev_(NULL),
+ debug_info_(NULL),
group_signatures_(),
output_file_size_(-1),
input_requires_executable_stack_(false),
".debug_str",
};
+static const char* lines_only_debug_sections[] =
+{ ".debug_abbrev",
+ // ".debug_aranges", // not used by gdb as of 6.7.1
+ // ".debug_frame",
+ ".debug_info",
+ ".debug_line",
+ // ".debug_loc",
+ // ".debug_macinfo",
+ // ".debug_pubnames", // not used by gdb as of 6.7.1
+ // ".debug_ranges",
+ ".debug_str",
+};
+
static inline bool
is_gdb_debug_section(const char* str)
{
return false;
}
+static inline bool
+is_lines_only_debug_section(const char* str)
+{
+ // We can do this faster: binary search or a hashtable. But why bother?
+ for (size_t i = 0;
+ i < sizeof(lines_only_debug_sections)/sizeof(*lines_only_debug_sections);
+ ++i)
+ if (strcmp(str, lines_only_debug_sections[i]) == 0)
+ return true;
+ return false;
+}
+
// Whether to include this section in the link.
template<int size, bool big_endian>
Layout::include_section(Sized_relobj<size, big_endian>*, const char* name,
const elfcpp::Shdr<size, big_endian>& shdr)
{
+ if (shdr.get_sh_flags() & elfcpp::SHF_EXCLUDE)
+ return false;
+
switch (shdr.get_sh_type())
{
case elfcpp::SHT_NULL:
case elfcpp::SHT_SYMTAB:
case elfcpp::SHT_DYNSYM:
- case elfcpp::SHT_STRTAB:
case elfcpp::SHT_HASH:
case elfcpp::SHT_DYNAMIC:
case elfcpp::SHT_SYMTAB_SHNDX:
return false;
+ case elfcpp::SHT_STRTAB:
+ // Discard the sections which have special meanings in the ELF
+ // ABI. Keep others (e.g., .stabstr). We could also do this by
+ // checking the sh_link fields of the appropriate sections.
+ return (strcmp(name, ".dynstr") != 0
+ && strcmp(name, ".strtab") != 0
+ && strcmp(name, ".shstrtab") != 0);
+
case elfcpp::SHT_RELA:
case elfcpp::SHT_REL:
case elfcpp::SHT_GROUP:
if (is_debug_info_section(name))
return false;
}
+ if (parameters->options().strip_debug_non_line()
+ && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0)
+ {
+ // Debugging sections can only be recognized by name.
+ if (is_prefix_of(".debug", name)
+ && !is_lines_only_debug_section(name))
+ return false;
+ }
if (parameters->options().strip_debug_gdb()
&& (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0)
{
&& !is_gdb_debug_section(name))
return false;
}
+ if (parameters->options().strip_lto_sections()
+ && !parameters->options().relocatable()
+ && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0)
+ {
+ // Ignore LTO sections containing intermediate code.
+ if (is_prefix_of(".gnu.lto_", name))
+ return false;
+ }
return true;
default:
const char* name, const elfcpp::Shdr<size, big_endian>& shdr,
unsigned int reloc_shndx, unsigned int, off_t* off)
{
+ *off = 0;
+
if (!this->include_section(object, name, shdr))
return NULL;
&& strcmp(this->options_.compress_debug_sections(), "none") != 0
&& is_compressible_debug_section(name))
os = new Output_compressed_section(&this->options_, name, type, flags);
- else
+
+ else if ((flags & elfcpp::SHF_ALLOC) == 0
+ && this->options_.strip_debug_non_line()
+ && strcmp(".debug_abbrev", name) == 0)
+ {
+ os = this->debug_abbrev_ = new Output_reduced_debug_abbrev_section(
+ name, type, flags);
+ if (this->debug_info_)
+ this->debug_info_->set_abbreviations(this->debug_abbrev_);
+ }
+ else if ((flags & elfcpp::SHF_ALLOC) == 0
+ && this->options_.strip_debug_non_line()
+ && strcmp(".debug_info", name) == 0)
+ {
+ os = this->debug_info_ = new Output_reduced_debug_info_section(
+ name, type, flags);
+ if (this->debug_abbrev_)
+ this->debug_info_->set_abbreviations(this->debug_abbrev_);
+ }
+ else
os = new Output_section(name, type, flags);
this->section_list_.push_back(os);
++p)
{
if ((*p)->type() == elfcpp::PT_LOAD
- && ((*p)->flags() & elfcpp::PF_W) == (seg_flags & elfcpp::PF_W))
+ && (parameters->options().omagic()
+ || ((*p)->flags() & elfcpp::PF_W) == (seg_flags & elfcpp::PF_W)))
{
// If -Tbss was specified, we need to separate the data
// and BSS segments.
if ((flags & elfcpp::SHF_TLS) != 0)
{
if (this->tls_segment_ == NULL)
- this->tls_segment_ = this->make_output_segment(elfcpp::PT_TLS,
- seg_flags);
+ this->make_output_segment(elfcpp::PT_TLS, seg_flags);
this->tls_segment_->add_output_section(os, seg_flags);
}
{
gold_assert(seg_flags == (elfcpp::PF_R | elfcpp::PF_W));
if (this->relro_segment_ == NULL)
- this->relro_segment_ = this->make_output_segment(elfcpp::PT_GNU_RELRO,
- seg_flags);
+ this->make_output_segment(elfcpp::PT_GNU_RELRO, seg_flags);
this->relro_segment_->add_output_section(os, seg_flags);
}
}
{
if ((*p)->type() == elfcpp::PT_LOAD
&& ((*p)->flags() & elfcpp::PF_R) != 0
- && ((*p)->flags() & elfcpp::PF_W) == 0)
+ && (parameters->options().omagic()
+ || ((*p)->flags() & elfcpp::PF_W) == 0))
return *p;
}
char buffer[uuidsz];
memset(buffer, 0, uuidsz);
- int descriptor = ::open("/dev/urandom", O_RDONLY);
+ int descriptor = open_descriptor(-1, "/dev/urandom", O_RDONLY);
if (descriptor < 0)
gold_error(_("--build-id=uuid failed: could not open /dev/urandom: %s"),
strerror(errno));
else
{
ssize_t got = ::read(descriptor, buffer, uuidsz);
- ::close(descriptor);
+ release_descriptor(descriptor, true);
if (got < 0)
gold_error(_("/dev/urandom: read failed: %s"), strerror(errno));
else if (static_cast<size_t>(got) != uuidsz)
}
}
+ const bool check_sections = parameters->options().check_sections();
+ Output_segment* last_load_segment = NULL;
+
bool was_readonly = false;
for (Segment_list::iterator p = this->segment_list_.begin();
p != this->segment_list_.end();
uint64_t aligned_addr = 0;
uint64_t abi_pagesize = target->abi_pagesize();
+ uint64_t common_pagesize = target->common_pagesize();
- // FIXME: This should depend on the -n and -N options.
- (*p)->set_minimum_p_align(target->common_pagesize());
+ if (!parameters->options().nmagic()
+ && !parameters->options().omagic())
+ (*p)->set_minimum_p_align(common_pagesize);
if (are_addresses_set)
{
- // Adjust the file offset to the same address modulo the
- // page size.
- uint64_t unsigned_off = off;
- uint64_t aligned_off = ((unsigned_off & ~(abi_pagesize - 1))
- | (addr & (abi_pagesize - 1)));
- if (aligned_off < unsigned_off)
- aligned_off += abi_pagesize;
- off = aligned_off;
+ if (!parameters->options().nmagic()
+ && !parameters->options().omagic())
+ {
+ // Adjust the file offset to the same address modulo
+ // the page size.
+ uint64_t unsigned_off = off;
+ uint64_t aligned_off = ((unsigned_off & ~(abi_pagesize - 1))
+ | (addr & (abi_pagesize - 1)));
+ if (aligned_off < unsigned_off)
+ aligned_off += abi_pagesize;
+ off = aligned_off;
+ }
}
else
{
if (!are_addresses_set && aligned_addr != addr)
{
- uint64_t common_pagesize = target->common_pagesize();
uint64_t first_off = (common_pagesize
- (aligned_addr
& (common_pagesize - 1)));
if (((*p)->flags() & elfcpp::PF_W) == 0)
was_readonly = true;
+
+ // Implement --check-sections. We know that the segments
+ // are sorted by LMA.
+ if (check_sections && last_load_segment != NULL)
+ {
+ gold_assert(last_load_segment->paddr() <= (*p)->paddr());
+ if (last_load_segment->paddr() + last_load_segment->memsz()
+ > (*p)->paddr())
+ {
+ unsigned long long lb1 = last_load_segment->paddr();
+ unsigned long long le1 = lb1 + last_load_segment->memsz();
+ unsigned long long lb2 = (*p)->paddr();
+ unsigned long long le2 = lb2 + (*p)->memsz();
+ gold_error(_("load segment overlap [0x%llx -> 0x%llx] and "
+ "[0x%llx -> 0x%llx]"),
+ lb1, le1, lb2, le2);
+ }
+ }
+ last_load_segment = *p;
}
}
}
if (parameters->options().shared() && this->has_static_tls())
flags |= elfcpp::DF_STATIC_TLS;
+ if (parameters->options().origin())
+ flags |= elfcpp::DF_ORIGIN;
odyn->add_constant(elfcpp::DT_FLAGS, flags);
flags = 0;
flags &= ~(elfcpp::DF_1_INITFIRST
| elfcpp::DF_1_NODELETE
| elfcpp::DF_1_NOOPEN);
+ if (parameters->options().origin())
+ flags |= elfcpp::DF_1_ORIGIN;
if (flags)
odyn->add_constant(elfcpp::DT_FLAGS_1, flags);
}
if (ins.first->second.group_)
{
// We've already seen a real section group with this signature.
+ // If the kept group is from a plugin object, and we're in
+ // the replacement phase, accept the new one as a replacement.
+ if (ins.first->second.object_ == NULL
+ && parameters->options().plugins()->in_replacement_phase())
+ {
+ ins.first->second = kept;
+ return true;
+ }
return false;
}
else if (group)
gold_assert(!parameters->options().relocatable());
Output_segment* oseg = new Output_segment(type, flags);
this->segment_list_.push_back(oseg);
+
+ if (type == elfcpp::PT_TLS)
+ this->tls_segment_ = oseg;
+ else if (type == elfcpp::PT_GNU_RELRO)
+ this->relro_segment_ = oseg;
+
return oseg;
}
projects / deliverable / binutils-gdb.git / blobdiff