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
62
63
|
// REQUIRES: arm
// RUN: llvm-mc --triple=armv7a-linux-gnueabihf -arm-add-build-attributes -filetype=obj -o %t.o %s
// RUN: ld.lld %t.o -o %t
// RUN: llvm-objdump --no-print-imm-hex --triple=armv7a-none-linux-gnueabi -d --no-show-raw-insn %t | FileCheck %s
/// A symbol assignment defined alias inherits st_type and gets the same treatment.
// RUN: llvm-mc --triple=armv7a-linux-gnueabihf -arm-add-build-attributes -filetype=obj --defsym ALIAS=1 -o %t1.o %s
// RUN: ld.lld --defsym foo=foo1 %t1.o -o %t1
// RUN: llvm-objdump --no-print-imm-hex --triple=armv7a-none-linux-gnueabi -d --no-show-raw-insn %t | FileCheck %s
/// Non-preemptible ifuncs are called via a PLT entry which is always Arm
/// state, expect the ARM callers to go direct to the PLT entry, Thumb
/// branches are indirected via state change thunks, the bl is changed to blx.
.syntax unified
.text
.balign 0x1000
.ifdef ALIAS
.type foo1 STT_GNU_IFUNC
.globl foo1
foo1:
.else
.type foo STT_GNU_IFUNC
.globl foo
foo:
.endif
bx lr
.section .text.1, "ax", %progbits
.arm
.global _start
_start:
b foo
bl foo
.section .text.2, "ax", %progbits
.thumb
.global thumb_caller
thumb_caller:
b foo
b.w foo
bl foo
// CHECK: 00021004 <_start>:
// CHECK-NEXT: b 0x21030
// CHECK-NEXT: bl 0x21030
// CHECK: 0002100c <thumb_caller>:
// CHECK-NEXT: b.w 0x21018 <__Thumbv7ABSLongThunk_foo>
// CHECK-NEXT: b.w 0x21018 <__Thumbv7ABSLongThunk_foo>
// CHECK-NEXT: blx 0x21030
// CHECK: 00021018 <__Thumbv7ABSLongThunk_foo>:
// CHECK-NEXT: movw r12, #4144
// CHECK-NEXT: movt r12, #2
// CHECK-NEXT: bx r12
// CHECK: Disassembly of section .iplt:
// CHECK: 00021030 <$a>:
// CHECK-NEXT: add r12, pc, #0, #12
// CHECK-NEXT: add r12, r12, #16, #20
// CHECK-NEXT: ldr pc, [r12, #8]!
|
