1// REQUIRES: x86
2// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o %t.o
3// RUN: echo "SECTIONS { . = SIZEOF_HEADERS; .text : { *(.text) } }" > %t.script
4// RUN: ld.lld -T %t.script %t.o -o %t
5// RUN: llvm-readobj --symbols %t | FileCheck %s
6
7// Test that _start is in the correct section.
8// CHECK:      Name: _start
9// CHECK-NEXT: Value:
10// CHECK-NEXT: Size: 0
11// CHECK-NEXT: Binding: Global
12// CHECK-NEXT: Type: None
13// CHECK-NEXT: Other: 0
14// CHECK-NEXT: Section: dn
15
16// Show that --gc-sections works when there are many sections, and that
17// referenced common and absolute symbols in such cases are not removed, nor are
18// they incorrectly attributed to the sections with index 0xFFF1 or 0xFFF2.
19// RUN: ld.lld %t.o -T %t.script -o %t --gc-sections
20// RUN: llvm-readobj --symbols --sections %t | FileCheck %s --check-prefix=GC
21
22// GC:      Sections [
23// GC-NEXT:   Section {
24// GC-NEXT:     Index: 0
25// GC-NEXT:     Name:  (0)
26// GC:        Section {
27// GC-NEXT:     Index: 1
28// GC-NEXT:     Name: dn
29// GC:        Section {
30// GC-NEXT:     Index: 2
31// GC-NEXT:     Name: .bss
32// GC:        Section {
33// GC-NEXT:     Index: 3
34// GC-NEXT:     Name: .comment
35// GC:        Section {
36// GC-NEXT:     Index: 4
37// GC-NEXT:     Name: .symtab
38// GC:        Section {
39// GC-NEXT:     Index: 5
40// GC-NEXT:     Name: .shstrtab
41// GC:        Section {
42// GC-NEXT:     Index: 6
43// GC-NEXT:     Name: .strtab
44// GC-NOT:    Section {
45
46// GC:      Symbols [
47// GC-NEXT:   Symbol {
48// GC-NEXT:     Name:  (0)
49// GC:        Symbol {
50// GC-NEXT:     Name: sdn
51// GC:        Symbol {
52// GC-NEXT:     Name: _start
53// GC:        Symbol {
54// GC-NEXT:     Name: abs
55// GC:        Symbol {
56// GC-NEXT:     Name: common
57// GC-NOT:    Symbol {
58
59.macro gen_sections4 x
60        .section a\x,"a"
61        .global sa\x
62        sa\x:
63        .section b\x,"a"
64        .global sa\x
65        sb\x:
66        .section c\x,"a"
67        .global sa\x
68        sc\x:
69        .section d\x,"a"
70        .global sa\x
71        sd\x:
72.endm
73
74.macro gen_sections8 x
75        gen_sections4 a\x
76        gen_sections4 b\x
77.endm
78
79.macro gen_sections16 x
80        gen_sections8 a\x
81        gen_sections8 b\x
82.endm
83
84.macro gen_sections32 x
85        gen_sections16 a\x
86        gen_sections16 b\x
87.endm
88
89.macro gen_sections64 x
90        gen_sections32 a\x
91        gen_sections32 b\x
92.endm
93
94.macro gen_sections128 x
95        gen_sections64 a\x
96        gen_sections64 b\x
97.endm
98
99.macro gen_sections256 x
100        gen_sections128 a\x
101        gen_sections128 b\x
102.endm
103
104.macro gen_sections512 x
105        gen_sections256 a\x
106        gen_sections256 b\x
107.endm
108
109.macro gen_sections1024 x
110        gen_sections512 a\x
111        gen_sections512 b\x
112.endm
113
114.macro gen_sections2048 x
115        gen_sections1024 a\x
116        gen_sections1024 b\x
117.endm
118
119.macro gen_sections4096 x
120        gen_sections2048 a\x
121        gen_sections2048 b\x
122.endm
123
124.macro gen_sections8192 x
125        gen_sections4096 a\x
126        gen_sections4096 b\x
127.endm
128
129.macro gen_sections16384 x
130        gen_sections8192 a\x
131        gen_sections8192 b\x
132.endm
133
134.macro gen_sections32768 x
135        gen_sections16384 a\x
136        gen_sections16384 b\x
137.endm
138
139gen_sections32768 a
140gen_sections16384 b
141gen_sections8192 c
142gen_sections4096 d
143gen_sections2048 e
144gen_sections1024 f
145gen_sections512 g
146gen_sections256 h
147gen_sections128 i
148gen_sections64 j
149gen_sections32 k
150gen_sections16 l
151gen_sections8 m
152gen_sections4 n
153
154.global abs
155abs = 0x12345678
156
157.comm common,4,4
158
159.global _start
160_start:
161  .quad abs
162  .quad common
163