File: wrap-plt.s

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (38 lines) | stat: -rw-r--r-- 894 bytes parent folder | download | duplicates (19)
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