1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
# REQUIRES: x86
# RUN: rm -rf %t && split-file %s %t
# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/a.s -o %t/a.o
# RUN: llvm-mc -filetype=obj -triple=x86_64 %p/Inputs/shared.s -o %t/b.o
# RUN: ld.lld -shared -soname=b %t/b.o -o %t/b.so
## With relro or without DATA_SEGMENT_RELRO_END just aligns to
## page boundary.
# RUN: ld.lld --hash-style=sysv -z norelro %t/a.o %t/b.so -T %t/1.t -o %t/a1
# RUN: llvm-readelf -S -l %t/a1 | FileCheck %s --check-prefixes=CHECK,CHECK1
# RUN: ld.lld --hash-style=sysv -z relro %t/a.o %t/b.so -T %t/1.t -o %t/a2
# RUN: llvm-readelf -S -l %t/a2 | FileCheck %s --check-prefixes=CHECK,CHECK2
# CHECK: Name Type Address Off Size ES Flg
# CHECK-NEXT: NULL {{.*}}
# CHECK: .orphan.ro PROGBITS {{.*}} A
# CHECK: .dynamic DYNAMIC {{.*}} WA
# CHECK-NEXT: __libc_atexit PROGBITS {{.*}} WA
# CHECK-NEXT: .got PROGBITS {{.*}} WA
# CHECK-NEXT: .got.plt PROGBITS {{.*}} WA
# CHECK: .orphan.rw PROGBITS {{.*}} WA
# CHECK1: Program Headers:
# CHECK1-NOT: GNU_RELRO
# CHECK2: Program Headers:
# CHECK2-NEXT: Type
# CHECK2-NEXT: PHDR
# CHECK2-NEXT: LOAD
# CHECK2-NEXT: LOAD
# CHECK2-NEXT: LOAD
# CHECK2-NEXT: LOAD
# CHECK2-NEXT: DYNAMIC
# CHECK2-NEXT: GNU_RELRO
# CHECK2-NEXT: GNU_STACK
# CHECK2: Section to Segment mapping:
# CHECK2: 06 .dynamic __libc_atexit .got {{$}}
# RUN: sed '/DATA_SEGMENT_RELRO_END/d' %t/1.t > %t/2.t
# RUN: not ld.lld %t/a.o %t/b.so -T %t/2.t -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR
# ERR: error: section: .got is not contiguous with other relro sections
#--- a.s
.global _start
_start:
.long bar
jmp *bar2@GOTPCREL(%rip)
.section .data,"aw"
.quad 0
.zero 4
.section .foo,"aw"
.section .bss,"",@nobits
.section __libc_atexit,"aw",@progbits
.dc.a __libc_atexit
.section .orphan.ro,"a",@progbits
.dc.a 0
.section .orphan.rw,"aw",@progbits
.dc.a .orphan.rw
#--- 1.t
SECTIONS {
. = SIZEOF_HEADERS;
.plt : { *(.plt) }
.text : { *(.text) }
. = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE));
.dynamic : { *(.dynamic) }
## The custom section __libc_atexit is made relro.
__libc_atexit : { *(__libc_atexit) }
.got : { *(.got) }
. = DATA_SEGMENT_RELRO_END (1 ? 24 : 0, .);
.got.plt : { *(.got.plt) }
.data : { *(.data) }
.bss : { *(.bss) }
. = DATA_SEGMENT_END (.);
.comment 0 : { *(.comment) }
}
|
