[hjl@gnu-cfl-1 note]$ cat x.s .text .globl _start .type _start, @function _start: ret .section ".note.1", "a" .p2align 3 .long 1f - 0f /* name length. */ .long 3f - 1f /* data length. */ .long 12345 /* note type. */ 0: .asciz "GNU" /* vendor name. */ 1: .p2align 3 .long 0 /* pr_type. */ .long 5f - 4f /* pr_datasz. */ 4: .zero 0x10 5: .p2align 3 3: [hjl@gnu-cfl-1 note]$ cat y.s .section ".note.2", "a" .p2align 2 .long 1f - 0f /* name length. */ .long 3f - 1f /* data length. */ .long 12345 /* note type. */ 0: .asciz "GNU" /* vendor name. */ 1: .p2align 2 .long 0 /* pr_type. */ .long 5f - 4f /* pr_datasz. */ 4: .zero 0x10 5: .p2align 2 3: [hjl@gnu-cfl-1 note]$ cat z.s .section ".note.3", "a" .p2align 2 .long 1f - 0f /* name length. */ .long 3f - 1f /* data length. */ .long 12345 /* note type. */ 0: .asciz "GNU" /* vendor name. */ 1: .p2align 2 .long 0 /* pr_type. */ .long 5f - 4f /* pr_datasz. */ 4: .zero 0x10 5: .p2align 2 3: [hjl@gnu-cfl-1 note]$ make as -mx86-used-note=yes -o y.o y.s as -mx86-used-note=yes -o x.o x.s as -mx86-used-note=yes -o z.o z.s ./ld -z noseparate-code --build-id -o x y.o x.o z.o readelf -lW x Elf file type is EXEC (Executable file) Entry point 0x400224 There are 5 program headers, starting at offset 64 Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align LOAD 0x000000 0x0000000000400000 0x0000000000400000 0x000225 0x000225 R E 0x1000 NOTE 0x000158 0x0000000000400158 0x0000000000400158 0x000028 0x000028 R 0x4 NOTE 0x000180 0x0000000000400180 0x0000000000400180 0x000030 0x000030 R 0x8 NOTE 0x0001b0 0x00000000004001b0 0x00000000004001b0 0x000028 0x000028 R 0x8 NOTE 0x0001d8 0x00000000004001d8 0x00000000004001d8 0x00004c 0x00004c R 0x4 Section to Segment mapping: Segment Sections... 00 .note.2 .note.gnu.property .note.1 .note.3 .note.gnu.build-id .text 01 .note.2 02 .note.gnu.property 03 .note.1 04 .note.3 .note.gnu.build-id [hjl@gnu-cfl-1 note]$ We can create just 2 PT_NOTE segments, instead of 4.
The master branch has been updated by H.J. Lu <hjl@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=23e463ed7c0d289e2291aaefd576bf02efd98df8 commit 23e463ed7c0d289e2291aaefd576bf02efd98df8 Author: H.J. Lu <hjl.tools@gmail.com> Date: Wed Oct 3 13:22:26 2018 -0700 ELF: Group PT_NOTE segments by section alignments Alignments of SHT_NOTE sections can be 8 bytes for 64-bit ELF files. We should put all adjacent SHT_NOTE sections with the same section alignment into a single PT_NOTE segment even when the section alignment != 4 bytes. Also check SHT_NOTE section type instead of section name. PR ld/23658 * elf.c (get_program_header_size): Put all adjacent SHT_NOTE sections with the same section alignment into a single PT_NOTE segment. Check SHT_NOTE section type instead of section name. (_bfd_elf_map_sections_to_segments): Likewise.
The master branch has been updated by H.J. Lu <hjl@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=1887ae7304dced5b081ee200a9e27fbb8f180143 commit 1887ae7304dced5b081ee200a9e27fbb8f180143 Author: H.J. Lu <hjl.tools@gmail.com> Date: Wed Oct 3 13:25:16 2018 -0700 ELF: Group and sort output note sections by section alignments To support putting all adjacent SHT_NOTE sections with the same section alignment into a single PT_NOTE segment, lang_insert_orphan must group and sort output note sections by section alignments in both output section list as well as output section statement list. PR ld/23658 * ldlang.c (lang_insert_orphan): Group and sort output note sections by section alignments.
The master branch has been updated by H.J. Lu <hjl@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=fb9bbfd7f2d39a1d4850fcf0f63ef1f077f55e4b commit fb9bbfd7f2d39a1d4850fcf0f63ef1f077f55e4b Author: H.J. Lu <hjl.tools@gmail.com> Date: Wed Oct 3 14:11:43 2018 -0700 ELF: Add testcases for PR ld/23658 Add testcases to verify that all SHT_NOTE sections with the same section alignment are placed in a single PT_NOTE segment. PR ld/23658 * testsuite/ld-elf/pr23658-1.d: New file. * testsuite/ld-elf/pr23658-1a.s: Likewise. * testsuite/ld-elf/pr23658-1b.s: Likewise. * testsuite/ld-elf/pr23658-1c.s: Likewise. * testsuite/ld-elf/pr23658-1d.s: Likewise. * testsuite/ld-elf/pr23658-2.rd: Likewise. * testsuite/ld-elf/pr23658-3.d: Likewise. * testsuite/ld-elf/pr23658-3.s: Likewise. * testsuite/ld-elf/pr23658-3.t: Likewise. * testsuite/ld-elf/shared.exp: Run PR ld/23658 tests.
Fixed.
The master branch has been updated by H.J. Lu <hjl@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=b35334aa98b75e4e166d30d673fd3bf1238dc7b7 commit b35334aa98b75e4e166d30d673fd3bf1238dc7b7 Author: H.J. Lu <hjl.tools@gmail.com> Date: Thu Oct 4 12:06:33 2018 -0700 pr23658-1.d: Also xfail ft32-* and xgate-* Since ft32-* and xgate-* use generic linker, SHT_NOTE sections aren't grouped nor sorted. PR ld/23658 * testsuite/ld-elf/pr23658-1.d: Also xfail ft32-* and xgate-*.
It isn't right for -shared: /export/build/gnu/binutils/build-x86_64-linux/ld/../gas/as-new --defsym ALIGN=3 -mx86-used-note=no -o tmpdir/pr23658-1a.o /export/gnu/import/git/sources/binutils-gdb/ld/testsuite/ld-elf/pr23658-1a.s /export/build/gnu/binutils/build-x86_64-linux/ld/../gas/as-new --defsym ALIGN=3 -mx86-used-note=no -o tmpdir/pr23658-1b.o /export/gnu/import/git/sources/binutils-gdb/ld/testsuite/ld-elf/pr23658-1b.s /export/build/gnu/binutils/build-x86_64-linux/ld/../gas/as-new --defsym ALIGN=3 -mx86-used-note=no -o tmpdir/pr23658-1c.o /export/gnu/import/git/sources/binutils-gdb/ld/testsuite/ld-elf/pr23658-1c.s /export/build/gnu/binutils/build-x86_64-linux/ld/../gas/as-new --defsym ALIGN=3 -mx86-used-note=no -o tmpdir/pr23658-1d.o /export/gnu/import/git/sources/binutils-gdb/ld/testsuite/ld-elf/pr23658-1d.s /export/build/gnu/binutils/build-x86_64-linux/ld/../gas/as-new --defsym ALIGN=3 -mx86-used-note=no -o tmpdir/start.o /export/gnu/import/git/sources/binutils-gdb/ld/testsuite/ld-elf/start.s ./ld-new -z norelro -L/export/gnu/import/git/sources/binutils-gdb/ld/testsuite/ld-elf --build-id -shared -o tmpdir/dump tmpdir/pr23658-1a.o tmpdir/pr23658-1b.o tmpdir/pr23658-1c.o tmpdir/pr23658-1d.o tmpdir/start.o /export/build/gnu/binutils/build-x86_64-linux/ld/../binutils/readelf -S -l --wide tmpdir/dump There are 16 section headers, starting at offset 0x2550: Section Headers: [Nr] Name Type Address Off Size ES Flg Lk Inf Al [ 0] NULL 0000000000000000 000000 000000 00 0 0 0 [ 1] .note.4 NOTE 0000000000002000 002000 000028 00 A 0 0 8 [ 2] .note.1 NOTE 0000000000002028 002028 000028 00 A 0 0 8 [ 3] .note.gnu.build-id NOTE 0000000000000200 000200 000024 00 A 0 0 4 [ 4] .note.2 NOTE 0000000000002050 002050 000028 00 A 0 0 4 [ 5] .note.3 NOTE 0000000000002078 002078 000028 00 A 0 0 4 [ 6] .hash HASH 0000000000000228 000228 000030 04 A 8 0 8 [ 7] .gnu.hash GNU_HASH 0000000000000258 000258 00003c 00 A 8 0 8 [ 8] .dynsym DYNSYM 0000000000000298 000298 0000a8 18 A 9 1 8 [ 9] .dynstr STRTAB 0000000000000340 000340 000013 00 A 0 0 1 [10] .text PROGBITS 0000000000001000 001000 000010 00 AX 0 0 1 [11] .eh_frame PROGBITS 00000000000020a0 0020a0 000000 00 A 0 0 8 [12] .dynamic DYNAMIC 00000000000030a0 0020a0 0000c0 10 WA 9 0 8 [13] .symtab SYMTAB 0000000000000000 002160 0002e8 18 14 25 8 [14] .strtab STRTAB 0000000000000000 002448 000081 00 0 0 1 [15] .shstrtab STRTAB 0000000000000000 0024c9 000081 00 0 0 1 Key to Flags: W (write), A (alloc), X (execute), M (merge), S (strings), I (info), L (link order), O (extra OS processing required), G (group), T (TLS), C (compressed), x (unknown), o (OS specific), E (exclude), l (large), p (processor specific) Elf file type is DYN (Shared object file) Entry point 0x1008 There are 8 program headers, starting at offset 64 Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align LOAD 0x000000 0x0000000000000000 0x0000000000000000 0x000353 0x000353 R 0x1000 LOAD 0x001000 0x0000000000001000 0x0000000000001000 0x000010 0x000010 R E 0x1000 LOAD 0x002000 0x0000000000002000 0x0000000000002000 0x0000a0 0x0000a0 R 0x1000 LOAD 0x0020a0 0x00000000000030a0 0x00000000000030a0 0x0000c0 0x0000c0 RW 0x1000 DYNAMIC 0x0020a0 0x00000000000030a0 0x00000000000030a0 0x0000c0 0x0000c0 RW 0x8 NOTE 0x002000 0x0000000000002000 0x0000000000002000 0x000050 0x000050 R 0x8 NOTE 0x000200 0x0000000000000200 0x0000000000000200 0x000024 0x000024 R 0x4 NOTE 0x002050 0x0000000000002050 0x0000000000002050 0x000050 0x000050 R 0x4 Section to Segment mapping: Segment Sections... 00 .note.gnu.build-id .hash .gnu.hash .dynsym .dynstr 01 .text 02 .note.4 .note.1 .note.2 .note.3 03 .dynamic 04 .dynamic 05 .note.4 .note.1 06 .note.gnu.build-id 07 .note.2 .note.3
gld${EMULATION_NAME}_place_orphan has else if ((flags & SEC_LOAD) != 0 && ((elfinput && sh_type == SHT_NOTE) || (!elfinput && CONST_STRNEQ (secname, ".note")))) place = &hold[orphan_interp]; linker script for -shared has SECTIONS { /* Read-only sections, merged into text segment: */ . = SEGMENT_START("text-segment", 0) + SIZEOF_HEADERS; .note.gnu.build-id : { *(.note.gnu.build-id) } .hash : { *(.hash) } .gnu.hash : { *(.gnu.hash) } There is no way to place a note section before .note.gnu.build-id in output statements since lang_insert_orphan can only insert an output statement after another output statement, not before another output statement.
The master branch has been updated by H.J. Lu <hjl@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f3e660db14a0a95f3953496d8beb7c58ef34c6d5 commit f3e660db14a0a95f3953496d8beb7c58ef34c6d5 Author: H.J. Lu <hjl.tools@gmail.com> Date: Mon Oct 8 04:39:09 2018 -0700 ELF: Properly group and place orphan note sections Properly group orphan note sections. When placing orphan note section as the first note section, place it after the section before all note sections. PR ld/23658 * ldlang.c (lang_insert_orphan): Properly group and place orphan note sections. Properly handle orphan note section before all note sections. * testsuite/ld-elf/pr23658-1.d: Renamed to ... * testsuite/ld-elf/pr23658-1a.d: This. Updated. * testsuite/ld-elf/pr23658-1b.d: New test. * testsuite/ld-elf/pr23658-1c.d: Likewise.
Fixed for 2.32.
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