https://sourceware.org/bugzilla/show_bug.cgi?id=34003
Bug ID: 34003
Summary: --rosegment puts read-only data in code segment
Product: binutils
Version: 2.47 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: hjl.tools at gmail dot com
CC: r at hev dot cc
Target Milestone: ---
-pie -z separate-code --no-rosegment generates:
Elf file type is DYN (Position-Independent Executable file)
Entry point 0x1050
There are 13 program headers, starting at offset 52
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
PHDR 0x000034 0x00000034 0x00000034 0x001a0 0x001a0 R 0x4
INTERP 0x0001f8 0x000001f8 0x000001f8 0x0001a 0x0001a R 0x1
[Requesting program interpreter: /libx32/ld-linux-x32.so.2]
LOAD 0x000000 0x00000000 0x00000000 0x00404 0x00404 R 0x1000
LOAD 0x001000 0x00001000 0x00001000 0x00161 0x00161 R E 0x1000
LOAD 0x002000 0x00002000 0x00002000 0x00114 0x00114 R 0x1000
LOAD 0x002eac 0x00003eac 0x00003eac 0x00160 0x00164 RW 0x1000
DYNAMIC 0x002eb8 0x00003eb8 0x00003eb8 0x00108 0x00108 RW 0x4
NOTE 0x0001d4 0x000001d4 0x000001d4 0x00024 0x00024 R 0x4
NOTE 0x0020c0 0x000020c0 0x000020c0 0x00054 0x00054 R 0x4
GNU_PROPERTY 0x0020c0 0x000020c0 0x000020c0 0x00034 0x00034 R 0x4
GNU_EH_FRAME 0x00200c 0x0000200c 0x0000200c 0x0002c 0x0002c R 0x4
GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RW 0x10
GNU_RELRO 0x002eac 0x00003eac 0x00003eac 0x00154 0x00154 R 0x1
Section to Segment mapping:
Segment Sections...
00
01 .interp
02 .note.gnu.build-id .interp .gnu.hash .dynsym .dynstr .gnu.version
.gnu.version_r .rela.dyn .rela.plt
03 .init .plt .plt.got .text .fini
04 .rodata .eh_frame_hdr .eh_frame .note.gnu.property .note.ABI-tag
05 .init_array .fini_array .data.rel.ro .dynamic .got .got.plt .data
.bss
06 .dynamic
07 .note.gnu.build-id
08 .note.gnu.property .note.ABI-tag
09 .note.gnu.property
10 .eh_frame_hdr
11
12 .init_array .fini_array .data.rel.ro .dynamic .got
-pie -z separate-code --rosegment generates:
Elf file type is DYN (Position-Independent Executable file)
Entry point 0x230
There are 12 program headers, starting at offset 52
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
PHDR 0x000034 0x00000034 0x00000034 0x00180 0x00180 R 0x4
INTERP 0x001000 0x00001000 0x00001000 0x0001a 0x0001a R 0x1
[Requesting program interpreter: /libx32/ld-linux-x32.so.2]
LOAD 0x000000 0x00000000 0x00000000 0x00341 0x00341 R E 0x1000
LOAD 0x001000 0x00001000 0x00001000 0x00320 0x00320 R 0x1000
LOAD 0x001eac 0x00002eac 0x00002eac 0x00160 0x00164 RW 0x1000
DYNAMIC 0x001eb8 0x00002eb8 0x00002eb8 0x00108 0x00108 RW 0x4
NOTE 0x0001b4 0x000001b4 0x000001b4 0x00024 0x00024 R 0x4
NOTE 0x0012cc 0x000012cc 0x000012cc 0x00054 0x00054 R 0x4
GNU_PROPERTY 0x0012cc 0x000012cc 0x000012cc 0x00034 0x00034 R 0x4
GNU_EH_FRAME 0x001218 0x00001218 0x00001218 0x0002c 0x0002c R 0x4
GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RW 0x10
GNU_RELRO 0x001eac 0x00002eac 0x00002eac 0x00154 0x00154 R 0x1
Section to Segment mapping:
Segment Sections...
00
01 .interp
02 .note.gnu.build-id .init .plt .plt.got .text .fini
03 .interp .gnu.hash .dynsym .dynstr .gnu.version .gnu.version_r
.rela.dyn .rela.plt .rodata .eh_frame_hdr .eh_frame .note.gnu.property
.note.ABI-tag
04 .init_array .fini_array .data.rel.ro .dynamic .got .got.plt .data
.bss
05 .dynamic
06 .note.gnu.build-id
07 .note.gnu.property .note.ABI-tag
08 .note.gnu.property
09 .eh_frame_hdr
10
11 .init_array .fini_array .data.rel.ro .dynamic .got
The read-only PHDR and INTERP segments are placed in the executable segment,
which defeats the purpose of -z separate-code.
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