File: empty-section-start-stop.test

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.8-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,388 kB
  • sloc: cpp: 7,438,767; ansic: 1,393,871; asm: 1,012,926; python: 241,728; f90: 86,635; objc: 75,411; lisp: 42,144; pascal: 17,286; sh: 10,027; ml: 5,082; perl: 4,730; awk: 3,523; makefile: 3,349; javascript: 2,251; xml: 892; fortran: 672
file content (36 lines) | stat: -rw-r--r-- 1,092 bytes parent folder | download | duplicates (10) 
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
 
# REQUIRES: x86
## __start/__stop symbols retain the associated empty sections with C identifier names.

# RUN: rm -rf %t && split-file %s %t
# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/test.s -o %t.o
# RUN: ld.lld -T %t/ldscript -o %t.out %t.o -z start-stop-visibility=default
# RUN: llvm-objdump -h -t %t.out | FileCheck %s

# CHECK:      .text
# CHECK-NEXT: empty1
# CHECK-NEXT: empty2
# CHECK-NEXT: empty3

# CHECK:      [[#%x,ADDR:]]       l       empty1 0000000000000000 .hidden __start_empty1
# CHECK-NEXT: {{0*}}[[#ADDR]]     g       empty2 0000000000000000 .protected __stop_empty2
# CHECK-NEXT: {{0*}}[[#ADDR]]     g       empty3 0000000000000000 __stop_empty3

#--- ldscript
SECTIONS {
  .text : { *(.text .text.*) }
  empty0 : { *(empty0) }
  empty1 : { *(empty1) }
  empty2 : { *(empty2) }
  empty3 : { *(empty3) }
}

#--- test.s
.weak __start_empty1, __stop_empty2, __stop_empty3
.hidden __start_empty1
.protected __stop_empty2

.globl _start
_start:
  movq __start_empty1@GOTPCREL(%rip),%rax
  movq __stop_empty2@GOTPCREL(%rip),%rax
  movq __stop_empty3@GOTPCREL(%rip),%rax