diff options
Diffstat (limited to 'gold/plugin.cc')
| -rw-r--r-- | gold/plugin.cc | 78 |
1 files changed, 77 insertions, 1 deletions
diff --git a/gold/plugin.cc b/gold/plugin.cc index 5aadc55..c39e11ec 100644 --- a/gold/plugin.cc +++ b/gold/plugin.cc @@ -115,6 +115,15 @@ update_section_order(const struct ld_plugin_section *section_list, static enum ld_plugin_status allow_section_ordering(); +static enum ld_plugin_status +allow_unique_segment_for_sections(); + +static enum ld_plugin_status +unique_segment_for_sections(const char* segment_name, + uint64_t flags, + uint64_t align, + const struct ld_plugin_section *section_list, + unsigned int num_sections); }; #endif // ENABLE_PLUGINS @@ -159,7 +168,7 @@ Plugin::load() sscanf(ver, "%d.%d", &major, &minor); // Allocate and populate a transfer vector. - const int tv_fixed_size = 24; + const int tv_fixed_size = 26; int tv_size = this->args_.size() + tv_fixed_size; ld_plugin_tv* tv = new ld_plugin_tv[tv_size]; @@ -273,6 +282,15 @@ Plugin::load() tv[i].tv_u.tv_allow_section_ordering = allow_section_ordering; ++i; + tv[i].tv_tag = LDPT_ALLOW_UNIQUE_SEGMENT_FOR_SECTIONS; + tv[i].tv_u.tv_allow_unique_segment_for_sections + = allow_unique_segment_for_sections; + + ++i; + tv[i].tv_tag = LDPT_UNIQUE_SEGMENT_FOR_SECTIONS; + tv[i].tv_u.tv_unique_segment_for_sections = unique_segment_for_sections; + + ++i; tv[i].tv_tag = LDPT_NULL; tv[i].tv_u.tv_val = 0; @@ -1685,6 +1703,64 @@ allow_section_ordering() return LDPS_OK; } +// Let the linker know that a subset of sections could be mapped +// to a unique segment. + +static enum ld_plugin_status +allow_unique_segment_for_sections() +{ + gold_assert(parameters->options().has_plugins()); + Layout* layout = parameters->options().plugins()->layout(); + layout->set_unique_segment_for_sections_specified(); + return LDPS_OK; +} + +// This function should map the list of sections specified in the +// SECTION_LIST to a unique segment. ELF segments do not have names +// and the NAME is used to identify Output Section which should contain +// the list of sections. This Output Section will then be mapped to +// a unique segment. FLAGS is used to specify if any additional segment +// flags need to be set. For instance, a specific segment flag can be +// set to identify this segment. Unsetting segment flags is not possible. +// ALIGN specifies the alignment of the segment. + +static enum ld_plugin_status +unique_segment_for_sections(const char* segment_name, + uint64_t flags, + uint64_t align, + const struct ld_plugin_section* section_list, + unsigned int num_sections) +{ + gold_assert(parameters->options().has_plugins()); + + if (num_sections == 0) + return LDPS_OK; + + if (section_list == NULL) + return LDPS_ERR; + + Layout* layout = parameters->options().plugins()->layout(); + gold_assert (layout != NULL); + + Layout::Unique_segment_info* s = new Layout::Unique_segment_info; + s->name = segment_name; + s->flags = flags; + s->align = align; + + for (unsigned int i = 0; i < num_sections; ++i) + { + Object* obj = parameters->options().plugins()->get_elf_object( + section_list[i].handle); + if (obj == NULL) + return LDPS_BAD_HANDLE; + unsigned int shndx = section_list[i].shndx; + Const_section_id secn_id(obj, shndx); + layout->insert_section_segment_map(secn_id, s); + } + + return LDPS_OK; +} + #endif // ENABLE_PLUGINS // Allocate a Pluginobj object of the appropriate size and endianness. |