aarch64-tlsdesc.s 2.01 KB
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-pc-linux %s -o %t.o
// RUN: ld.lld --hash-style=sysv -shared %t.o -o %t.so
// RUN: llvm-objdump -d --no-show-raw-insn %t.so | FileCheck %s
// RUN: llvm-readobj -r %t.so | FileCheck --check-prefix=REL %s

	.text
        adrp    x0, :tlsdesc:a
        ldr     x1, [x0, :tlsdesc_lo12:a]
        add     x0, x0, :tlsdesc_lo12:a
        .tlsdesccall a
        blr     x1

// Create relocation against local TLS symbols where linker should
// create target specific dynamic TLSDESC relocation where addend is
// the symbol VMA in tls block.

// CHECK:      10298: adrp    x0, #65536
// CHECK-NEXT: 1029c: ldr     x1, [x0, #856]
// CHECK-NEXT: 102a0: add     x0, x0, #856
// CHECK-NEXT: 102a4: blr     x1

	adrp	x0, :tlsdesc:local1
	ldr	x1, [x0, :tlsdesc_lo12:local1]
	add	x0, x0, :tlsdesc_lo12:local1
        .tlsdesccall a
        blr     x1

// CHECK:      102a8: adrp    x0, #65536
// CHECK-NEXT: 102ac: ldr     x1, [x0, #872]
// CHECK-NEXT: 102b0: add     x0, x0, #872
// CHECK-NEXT: 102b4: blr     x1

	adrp	x0, :tlsdesc:local2
	ldr	x1, [x0, :tlsdesc_lo12:local2]
	add	x0, x0, :tlsdesc_lo12:local2
        .tlsdesccall a
        blr     x1

// CHECK:      102b8: adrp    x0, #65536
// CHECK-NEXT: 102bc: ldr     x1, [x0, #888]
// CHECK-NEXT: 102c0: add     x0, x0, #888
// CHECK-NEXT: 102c4: blr     x1

        .section .tbss,"awT",@nobits
        .type   local1,@object
        .p2align 2
local1:
        .word   0
        .size   local1, 4

        .type   local2,@object
        .p2align 3
local2:
        .xword  0
        .size   local2, 8


// 0x1000 + 4096 + 160 = 0x20A0
// 0x1000 + 4096 + 176 = 0x20B0
// 0x1000 + 4096 + 144 = 0x2090

// R_AARCH64_TLSDESC - 0x0 -> start of tls block
// R_AARCH64_TLSDESC - 0x8 -> align (sizeof (local1), 8)

// REL:      Relocations [
// REL-NEXT:   Section (4) .rela.dyn {
// REL-NEXT:     0x20368 R_AARCH64_TLSDESC - 0x0
// REL-NEXT:     0x20378 R_AARCH64_TLSDESC - 0x8
// REL-NEXT:     0x20358 R_AARCH64_TLSDESC a 0x0
// REL-NEXT:   }
// REL-NEXT: ]