eh-frame-value-format8.s
1.95 KB
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
# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
# RUN: ld.lld --eh-frame-hdr --section-start .text=0x1000 %t.o -o %t
# RUN: llvm-readobj -S --section-data %t | FileCheck %s
## Check we are able to handle DW_EH_PE_absptr encoding.
# CHECK: Section {
# CHECK: Index:
# CHECK: Name: .eh_frame_hdr
# CHECK-NEXT: Type: SHT_PROGBITS
# CHECK-NEXT: Flags [
# CHECK-NEXT: SHF_ALLOC
# CHECK-NEXT: ]
# CHECK-NEXT: Address: 0x2004
# CHECK-NEXT: Offset: 0x1004
# CHECK-NEXT: Size: 20
# CHECK-NEXT: Link: 0
# CHECK-NEXT: Info: 0
# CHECK-NEXT: AddressAlignment: 4
# CHECK-NEXT: EntrySize: 0
# CHECK-NEXT: SectionData (
# CHECK-NEXT: 0000: 011B033B 10000000 01000000 30F2FFFF
# CHECK-NEXT: 0010: 24000000
# Header (always 4 bytes): 011B033B
# 10000000 = .eh_frame(0x2018) - .eh_frame_hdr(0x2004) - 4
# 01000000 = 1 = the number of FDE pointers in the table.
# 30F2FFFF = foo(0x1000) - 0x234(addend) - .eh_frame_hdr(0x2004)
# CHECK: Section {
# CHECK: Index:
# CHECK: Name: .eh_frame
# CHECK-NEXT: Type: SHT_PROGBITS
# CHECK-NEXT: Flags [
# CHECK-NEXT: SHF_ALLOC
# CHECK-NEXT: ]
# CHECK-NEXT: Address: 0x2018
# CHECK-NEXT: Offset: 0x1018
# CHECK-NEXT: Size:
# CHECK-NEXT: Link:
# CHECK-NEXT: Info:
# CHECK-NEXT: AddressAlignment:
# CHECK-NEXT: EntrySize:
# CHECK-NEXT: SectionData (
# CHECK-NEXT: 0000: 0C000000 00000000 01520001 010100FF
# CHECK-NEXT: 0010: 0C000000 14000000 34120000 00000000
# ^
# ---> ADDR(foo) + 0x234 = 0x1234
.text
.global foo
foo:
nop
.section .eh_frame,"a",@unwind
.long 12 # Size
.long 0x00 # ID
.byte 0x01 # Version.
.byte 0x52 # Augmentation string: 'R','\0'
.byte 0x00
.byte 0x01
.byte 0x01 # LEB128
.byte 0x01 # LEB128
.byte 0x00 # DW_EH_PE_absptr
.byte 0xFF
.long 12 # Size
.long 0x14 # ID
.quad foo + 0x234