https://sourceware.org/bugzilla/show_bug.cgi?id=22423
Bug ID: 22423
Summary: PT_PHDR segment is marked with PF_X
Product: binutils
Version: 2.30 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
[hjl@gnu-tools-1 tmp]$ cat
/export/gnu/import/git/sources/binutils-gdb/ld/testsuite/ld-elf/start.s
.text
.global start /* Used by SH targets. */
start:
.global _start
_start:
.global __start
__start:
.global main /* Used by HPPA targets. */
main:
.dc.a 0
[hjl@gnu-tools-1 tmp]$ as -o x.o
/export/gnu/import/git/sources/binutils-gdb/ld/testsuite/ld-elf/start.s
[hjl@gnu-tools-1 tmp]$ ld -pie --no-dynamic-linker x.o
[hjl@gnu-tools-1 tmp]$ readelf -l a.out
Elf file type is DYN (Shared object file)
Entry point 0x169
There are 4 program headers, starting at offset 64
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
LOAD 0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000178 0x0000000000000178 R E 0x200000
LOAD 0x0000000000000f20 0x0000000000200f20 0x0000000000200f20
0x00000000000000e0 0x00000000000000e0 RW 0x200000
DYNAMIC 0x0000000000000f20 0x0000000000200f20 0x0000000000200f20
0x00000000000000e0 0x00000000000000e0 RW 0x8
GNU_RELRO 0x0000000000000f20 0x0000000000200f20 0x0000000000200f20
0x00000000000000e0 0x00000000000000e0 R 0x1
Section to Segment mapping:
Segment Sections...
00 .hash .gnu.hash .dynsym .dynstr .text
01 .dynamic
02 .dynamic
03 .dynamic
[hjl@gnu-tools-1 tmp]$ ld.gold -pie x.o
[hjl@gnu-tools-1 tmp]$ readelf -l a.out
Elf file type is DYN (Shared object file)
Entry point 0x1f0
There are 6 program headers, starting at offset 64
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
PHDR 0x0000000000000040 0x0000000000000040 0x0000000000000040
0x0000000000000150 0x0000000000000150 R 0x8
INTERP 0x0000000000000190 0x0000000000000190 0x0000000000000190
0x000000000000000f 0x000000000000000f R 0x1
[Requesting program interpreter: /lib/ld64.so.1]
LOAD 0x0000000000000000 0x0000000000000000 0x0000000000000000
0x00000000000001f8 0x00000000000001f8 R E 0x1000
LOAD 0x0000000000000f30 0x0000000000001f30 0x0000000000001f30
0x00000000000000d0 0x00000000000000d0 RW 0x1000
DYNAMIC 0x0000000000000f30 0x0000000000001f30 0x0000000000001f30
0x00000000000000d0 0x00000000000000d0 RW 0x8
GNU_RELRO 0x0000000000000f30 0x0000000000001f30 0x0000000000001f30
0x00000000000000d0 0x00000000000000d0 RW 0x8
Section to Segment mapping:
Segment Sections...
00
01 .interp
02 .interp .dynsym .dynstr .gnu.hash .hash .text
03 .dynamic
04 .dynamic
05 .dynamic
[hjl@gnu-tools-1 tmp]$
We have]
m->p_type = PT_PHDR;
/* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
m->p_flags = PF_R | PF_X;
m->p_flags_valid = 1;
m->includes_phdrs = 1;
It was reasonable 20 years ago. But it is wrong today when the primary
OS of GNU ld is Linux.
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