aboutsummaryrefslogtreecommitdiff
path: root/test/ELF/eh-frame-hdr.s
blob: 4498d7d30eaa4446196ddd229055857f17ef2cb3 (plain) (blame)
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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
// REQUIRES: x86
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o

// RUN: ld.lld %t.o -o %t
// RUN: llvm-readobj -file-headers -s -section-data -program-headers -symbols %t \
// RUN:   | FileCheck %s --check-prefix=NOHDR

// RUN: ld.lld -eh-frame-hdr -no-eh-frame-hdr %t.o -o %t
// RUN: llvm-readobj -file-headers -s -section-data -program-headers -symbols %t \
// RUN:   | FileCheck %s --check-prefix=NOHDR

// RUN: ld.lld --eh-frame-hdr %t.o -o %t
// RUN: llvm-readobj -file-headers -s -section-data -program-headers -symbols %t \
// RUN:   | FileCheck %s --check-prefix=HDR
// RUN: llvm-objdump -d %t | FileCheck %s --check-prefix=HDRDISASM

.section foo,"ax",@progbits
.cfi_startproc
 nop
.cfi_endproc

.section bar,"ax",@progbits
.cfi_startproc
 nop
.cfi_endproc

.section dah,"ax",@progbits
.cfi_startproc
 nop
.cfi_endproc

.text
.globl _start
_start:

// NOHDR:       Sections [
// NOHDR-NOT:    Name: .eh_frame_hdr
// NOHDR:      ProgramHeaders [
// NOHDR-NOT:   PT_GNU_EH_FRAME

//HDRDISASM:      Disassembly of section foo:
//HDRDISASM-NEXT: foo:
//HDRDISASM-NEXT:    201000: 90 nop
//HDRDISASM-NEXT: Disassembly of section bar:
//HDRDISASM-NEXT: bar:
//HDRDISASM-NEXT:    201001: 90 nop
//HDRDISASM-NEXT: Disassembly of section dah:
//HDRDISASM-NEXT: dah:
//HDRDISASM-NEXT:    201002: 90 nop

// HDR:       Section {
// HDR:         Index:
// HDR:         Name: .eh_frame_hdr
// HDR-NEXT:    Type: SHT_PROGBITS
// HDR-NEXT:    Flags [
// HDR-NEXT:      SHF_ALLOC
// HDR-NEXT:    ]
// HDR-NEXT:    Address: 0x200158
// HDR-NEXT:    Offset: 0x158
// HDR-NEXT:    Size: 36
// HDR-NEXT:    Link: 0
// HDR-NEXT:    Info: 0
// HDR-NEXT:    AddressAlignment: 1
// HDR-NEXT:    EntrySize: 0
// HDR-NEXT:    SectionData (
// HDR-NEXT:      0000: 011B033B 24000000 03000000 A80E0000
// HDR-NEXT:      0010: 40000000 A90E0000 58000000 AA0E0000
// HDR-NEXT:      0020: 70000000
// HDR-NEXT:    )
//              Header (always 4 bytes): 0x011B033B
//                 24000000 = .eh_frame(0x200180) - .eh_frame_hdr(0x200158) - 4
//                 03000000 = 3 = the number of FDE pointers in the table.
//              Entry(1): A80E0000 40000000
//                 480E0000 = 0x201000 - .eh_frame_hdr(0x200158) = 0xEA8
//                 40000000 = address of FDE(1) - .eh_frame_hdr(0x200158) =
//                    = .eh_frame(0x200180) + 24 - 0x200158 = 0x40
//              Entry(2): A90E0000 58000000
//                 A90E0000 = 0x201001 - .eh_frame_hdr(0x200158) = 0xEA9
//                 58000000 = address of FDE(2) - .eh_frame_hdr(0x200158) =
//                    = .eh_frame(0x200180) + 24 + 24 - 0x200158 = 0x58
//              Entry(3): AA0E0000 70000000
//                 AA0E0000 = 0x201002 - .eh_frame_hdr(0x200158) = 0xEAA
//                 70000000 = address of FDE(3) - .eh_frame_hdr(0x200158) =
//                    = .eh_frame(0x200180) + 24 + 24 + 24 - 0x200158 = 0x70
// HDR-NEXT:  }
// HDR-NEXT:  Section {
// HDR-NEXT:    Index:
// HDR-NEXT:    Name: .eh_frame
// HDR-NEXT:    Type: SHT_PROGBITS
// HDR-NEXT:    Flags [
// HDR-NEXT:      SHF_ALLOC
// HDR-NEXT:    ]
// HDR-NEXT:    Address: 0x200180
// HDR-NEXT:    Offset: 0x180
// HDR-NEXT:    Size: 96
// HDR-NEXT:    Link: 0
// HDR-NEXT:    Info: 0
// HDR-NEXT:    AddressAlignment: 8
// HDR-NEXT:    EntrySize: 0
// HDR-NEXT:    SectionData (
// HDR-NEXT:      0000: 14000000 00000000 017A5200 01781001
// HDR-NEXT:      0010: 1B0C0708 90010000 14000000 1C000000
// HDR-NEXT:      0020: 600E0000 01000000 00000000 00000000
// HDR-NEXT:      0030: 14000000 34000000 490E0000 01000000
// HDR-NEXT:      0040: 00000000 00000000 14000000 4C000000
// HDR-NEXT:      0050: 320E0000 01000000 00000000 00000000
// HDR-NEXT:    )
//            CIE: 14000000 00000000 017A5200 01781001 1B0C0708 90010000
//            FDE(1): 14000000 1C000000 600E0000 01000000 00000000 00000000
//                    address of data (starts with 0x600E0000) = 0x200180 + 0x0020 = 0x2001A0
//                    The starting address to which this FDE applies = 0xE60 + 0x2001A0 = 0x201000
//                    The number of bytes after the start address to which this FDE applies = 0x01000000 = 1
//            FDE(2): 14000000 34000000 490E0000 01000000 00000000 00000000
//                    address of data (starts with 0x490E0000) = 0x200180 + 0x0038 = 0x2001B8
//                    The starting address to which this FDE applies = 0xE49 + 0x2001B8 = 0x201001
//                    The number of bytes after the start address to which this FDE applies = 0x01000000 = 1
//            FDE(3): 14000000 4C000000 320E0000 01000000 00000000 00000000
//                    address of data (starts with 0x320E0000) = 0x200180 + 0x0050 = 0x2001D0
//                    The starting address to which this FDE applies = 0xE5A + 0x2001D0 = 0x201002
//                    The number of bytes after the start address to which this FDE applies = 0x01000000 = 1
// HDR-NEXT:  }
// HDR:     ProgramHeaders [
// HDR:      ProgramHeader {
// HDR:       Type: PT_GNU_EH_FRAME
// HDR-NEXT:   Offset: 0x158
// HDR-NEXT:   VirtualAddress: 0x200158
// HDR-NEXT:   PhysicalAddress: 0x200158
// HDR-NEXT:   FileSize: 36
// HDR-NEXT:   MemSize: 36
// HDR-NEXT:   Flags [
// HDR-NEXT:     PF_R
// HDR-NEXT:   ]
// HDR-NEXT:   Alignment: 1
// HDR-NEXT: }