File: x86-64-gotpc-offset.s

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (30 lines) | stat: -rw-r--r-- 913 bytes parent folder | download | duplicates (23) 
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
 
# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o
# RUN: ld.lld %t.o -o %t
# RUN: llvm-objdump -s -d %t | FileCheck %s

# CHECK:      Contents of section .got:
# CHECK-NEXT: {{^}} [[#%x,ADDR:]] {{.*}} 00000000

# CHECK:      leal {{.*}}(%rip), %eax  # {{.*}} <foo>
# CHECK-NEXT: movl {{.*}}(%rip), %eax  # 0x[[#ADDR+4]]
# CHECK-NEXT: movq {{.*}}(%rip), %rax  # 0x[[#ADDR+1]]

## movl foo@GOTPCREL(%rip), %eax
  movl 0(%rip), %eax
  .reloc .-4, R_X86_64_GOTPCRELX, foo-4

## The instruction has an offset (addend!=-4). It is incorrect to relax movl to leal.
## movl foo@GOTPCREL+4(%rip), %eax
  movl 0(%rip), %eax
  .reloc .-4, R_X86_64_GOTPCRELX, foo

## This does not make sense because it loads one byte past the GOT entry.
## It is just to demonstrate the behavior.
## movq foo@GOTPCREL+1(%rip), %rax
  movq 0(%rip), %rax
  .reloc .-4, R_X86_64_REX_GOTPCRELX, foo-3

.globl foo
foo:
  nop