File: wrap-plt.s

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (38 lines) | stat: -rw-r--r-- 894 bytes parent folder | download | duplicates (18)
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
// REQUIRES: x86

/// Test we correctly wrap PLT calls.

// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t

// RUN: ld.lld -o %t2 %t -wrap foo -shared
// RUN: llvm-readobj -S -r %t2 | FileCheck %s
// RUN: llvm-objdump -d %t2 | FileCheck --check-prefix=DISASM %s

// CHECK:      Relocations [
// CHECK-NEXT:   Section ({{.*}}) .rela.plt {
// CHECK-NEXT:     R_X86_64_JUMP_SLOT foo 0x0
// CHECK-NEXT:     R_X86_64_JUMP_SLOT __wrap_foo 0x0
// CHECK-NEXT:     R_X86_64_JUMP_SLOT _start 0x0
// CHECK-NEXT:   }
// CHECK-NEXT: ]

// DISASM:      <_start>:
// DISASM-NEXT:   jmp {{.*}} <__wrap_foo@plt>
// DISASM-NEXT:   jmp {{.*}} <__wrap_foo@plt>
// DISASM-NEXT:   jmp {{.*}} <foo@plt>
// DISASM-NEXT:   jmp {{.*}} <_start@plt>

.global foo
foo:
  nop

.global __wrap_foo
__wrap_foo:
  nop

.global _start
_start:
  jmp foo@plt
  jmp __wrap_foo@plt
  jmp __real_foo@plt
  jmp _start@plt