File: aarch64-undefined-weak.s

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.8-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,696 kB
  • sloc: cpp: 7,438,781; ansic: 1,393,871; asm: 1,012,926; python: 241,771; f90: 86,635; objc: 75,411; lisp: 42,144; pascal: 17,286; sh: 8,596; ml: 5,082; perl: 4,730; makefile: 3,591; awk: 3,523; javascript: 2,251; xml: 892; fortran: 672
file content (61 lines) | stat: -rw-r--r-- 1,846 bytes parent folder | download | duplicates (5)
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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64 %s -o %t.o
// RUN: ld.lld --image-base=0x10000000 %t.o -o %t
// RUN: llvm-objdump -d -z --no-show-raw-insn %t | FileCheck %s

// Check that the ARM 64-bit ABI rules for undefined weak symbols are applied.
// Branch instructions are resolved to the next instruction. Undefined
// Symbols in relative are resolved to the place so S - P + A = A.
// We place the image-base at 0x10000000 to test that a range extensions thunk
// is not generated.
 .weak target

.weak undefweak2
.hidden undefweak2

 .text
 .global _start
_start:
// R_AARCH64_JUMP26
 b target
// R_AARCH64_CALL26
 bl target
// R_AARCH64_CONDBR19
 b.eq target
// R_AARCH64_TSTBR14
 cbz x1, target
// R_AARCH64_ADR_PREL_LO21
 adr x0, target
// R_AARCH64_ADR_PREL_PG_HI21
 adrp x0, target
// R_AARCH64_LD_PREL_LO19
 ldr x8, target
// R_AARCH64_PREL32
 .word target - .
// R_AARCH64_PREL64
 .xword target - .
// R_AARCH64_PREL16
 .hword target - .
// R_AARCH64_PLT32
 .word target@PLT - .

bl_undefweak2:
 bl undefweak2

// CHECK: Disassembly of section .text:
// CHECK-EMPTY:
// CHECK-NEXT: 0000000010010120 <_start>:
// CHECK-NEXT: 10010120: b       0x10010124
// CHECK-NEXT: 10010124: bl      0x10010128
// CHECK-NEXT: 10010128: b.eq    0x1001012c
// CHECK-NEXT: 1001012c: cbz     x1, 0x10010130
// CHECK-NEXT: 10010130: adr     x0, 0x10010130
// CHECK-NEXT: 10010134: adrp    x0, 0x10010000
// CHECK-NEXT: 10010138: ldr     x8, 0x10010138
// CHECK:      1001013c: 00 00 00 00     .word   0x00000000
// CHECK-NEXT: 10010140: 00 00 00 00     .word   0x00000000
// CHECK-NEXT: 10010144: 00 00 00 00     .word   0x00000000
// CHECK-NEXT: 10010148: 00 00 00 00     .word   0x00000000
// CHECK-NEXT: 1001014c: 00 00           .short  0x0000
// CHECK-LABEL: <bl_undefweak2>:
// CHECK-NEXT:    bl {{.*}} <bl_undefweak2+0x4>