lld/test/ELF/many-alloc-sections.s

   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: abs
  53 // GC:        Symbol {
  54 // GC-NEXT:     Name: common
  55 // GC:        Symbol {
  56 // GC-NEXT:     Name: _start
  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
 139 gen_sections32768 a
 140 gen_sections16384 b
 141 gen_sections8192 c
 142 gen_sections4096 d
 143 gen_sections2048 e
 144 gen_sections1024 f
 145 gen_sections512 g
 146 gen_sections256 h
 147 gen_sections128 i
 148 gen_sections64 j
 149 gen_sections32 k
 150 gen_sections16 l
 151 gen_sections8 m
 152 gen_sections4 n
 153
 154 .global abs
 155 abs = 0x12345678
 156
 157 .comm common,4,4
 158
 159 .global _start
 160 _start:
 161   .quad abs
 162   .quad common