Xing GUO 91f02ebcd5 [BinaryFormat] Add DT_USED tag into dynamic section. ... Summary: This tag is documented in https://docs.oracle.com/cd/E19253-01/817-1984/chapter6-42444/index.html Though I could not find some docs that describe it in detail, I found some code snippets. 1. ``` /* * Look up the string in the string table and get its offset. If * this succeeds, then it is possible that there is a DT_NEEDED * dynamic entry that references it. */ have_string = elfedit_sec_findstr(argstate->str.sec, strpad_elt.dn_dyn.d_un.d_val, arg, &str_offset) != 0; if (have_string) { dyn = argstate->dynamic.data; for (ndx = 0; ndx < numdyn; dyn++, ndx++) { if (((dyn->d_tag == DT_NEEDED) || (dyn->d_tag == DT_USED)) && (dyn->d_un.d_val == str_offset)) goto done; } } ``` 80192cd83b/usr/src/cmd/sgs/elfedit/modules/common/syminfo.c (L512) 2. ``` case DT_USED: case DT_INIT_ARRAY: case DT_FINI_ARRAY: if (do_dynamic) { if (entry->d_tag == DT_USED && VALID_DYNAMIC_NAME (entry->d_un.d_val)) { char *name = GET_DYNAMIC_NAME (entry->d_un.d_val); if (*name) { printf (_("Not needed object: [%s]\n"), name); break; } } print_vma (entry->d_un.d_val, PREFIX_HEX); putchar ('\n'); } break; ``` http://web.mit.edu/freebsd/head/contrib/binutils/binutils/readelf.c 3. ``` #define DT_USED 0x7ffffffe /* ignored - same as needed */ ``` https://github.com/switchbrew/switch-tools/blob/master/src/elf_common.h Reviewers: jhenderson, grimar Reviewed By: jhenderson, grimar Subscribers: emaste, krytarowski, fedor.sergeev, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D58762 llvm-svn: 355468		2019-03-06 01:28:40 +00:00
..
dsymutil	dsymutil support for DW_OP_convert	2019-02-28 22:12:32 +00:00
gold
llvm-ar	[llvm-ar] Implement the P modifier.	2019-02-14 18:35:13 +00:00
llvm-cfi-verify
llvm-config
llvm-cov	[llvm-cov] Add support for gcov --hash-filenames option	2019-02-19 20:45:00 +00:00
llvm-cvtres
llvm-cxxdump
llvm-cxxfilt	[llvm-cxxfilt] Re-enable split and demangle stdin input on certain non-alphanumerics.	2019-02-27 21:39:11 +00:00
llvm-cxxmap
llvm-diff
llvm-dlltool
llvm-dwarfdump	[DWARFFormValue] Don't consider DW_FORM_data4/8 to be section offsets.	2019-03-05 23:47:22 +00:00
llvm-dwp	[llvm-dwp] Avoid writing the output dwp file when there is an error	2019-02-12 20:00:51 +00:00
llvm-elfabi	[yaml2obj][obj2yaml] - Add support for dumping/parsing .dynamic sections.	2019-02-09 11:34:28 +00:00
llvm-exegesis	[llvm-exegesis] Teach llvm-exegesis to handle instructions with multiple tied variables.	2019-02-26 10:54:45 +00:00
llvm-extract
llvm-isel-fuzzer
llvm-lib	[llvm-ar][libObject] Fix relative paths when nesting thin archives.	2019-02-13 23:39:41 +00:00
llvm-lit
llvm-lto
llvm-lto2
llvm-mc
llvm-mca	[MCA] Highlight kernel bottlenecks in the summary view.	2019-03-04 11:52:34 +00:00
llvm-modextract
llvm-mt
llvm-nm	[WebAssembly] Remove uses of ThreadModel	2019-02-28 18:39:08 +00:00
llvm-objcopy	[llvm-objcopy] - Simplify isCompressable and fix the issue relative.	2019-03-05 13:07:43 +00:00
llvm-objdump	[llvm-objdump] Should print unknown d_tag in hex format	2019-03-02 04:20:28 +00:00
llvm-opt-fuzzer
llvm-opt-report
llvm-pdbdump	[NativePDB] Fix access to both old & new fpo data entries from dbi stream	2019-01-30 10:40:45 +00:00
llvm-profdata
llvm-rc
llvm-readobj	[llvm-readobj] Display section names for STT_SECTION symbols.	2019-03-01 17:31:32 +00:00
llvm-size
llvm-split
llvm-strings
llvm-symbolizer	[symbolizer] Avoid collecting symbols belonging to invalid sections.	2019-02-14 23:50:35 +00:00
llvm-xray/X86
lto
obj2yaml	[BinaryFormat] Add DT_USED tag into dynamic section.	2019-03-06 01:28:40 +00:00
opt-viewer	[opt-viewer] Add --filter option to select remarks for displaying.	2019-02-06 18:43:37 +00:00
sancov
sanstats
yaml2obj	[yaml2obj] - Allow setting custom sh_info for RawContentSection sections.	2019-03-01 10:18:16 +00:00