forked from OSchip/llvm-project
95 lines
3.9 KiB
ArmAsm
95 lines
3.9 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv5-none-linux-gnueabi %s -o %t
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// RUN: ld.lld %t -o %t2 --shared 2>&1
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// RUN: llvm-objdump --start-address=7340044 --stop-address=7340048 --triple=armv5-none-linux-gnueabi -d %t2 | FileCheck %s
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// RUN: llvm-objdump --start-address=8388620 --stop-address=8388624 --triple=thumbv5-none-linux-gnueabi -d %t2 | FileCheck %s -check-prefix=CHECK-CALL
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// RUN: llvm-objdump --start-address=13631520 --stop-address=13631584 --triple=armv5-none-linux-gnueabi -d %t2 | FileCheck %s -check-prefix=CHECK-PLT
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// When we create a thunk to a PLT entry the relocation is redirected to the
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// Thunk, changing its expression to a non-PLT equivalent. If the thunk
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// becomes unusable we need to restore the relocation expression to the PLT
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// form so that when we create a new thunk it targets the PLT.
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// Test case that checks the case:
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// - Thunk is created on pass 1 to a PLT entry for preemptible
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// - Some other Thunk added in the same pass moves the thunk to
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// preemptible out of range of its caller.
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// - New Thunk is created on pass 2 to PLT entry for preemptible
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.globl preemptible
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.globl preemptible2
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.section .text.01, "ax", %progbits
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.balign 0x100000
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.thumb
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.globl needsplt
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.type needsplt, %function
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needsplt:
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bl preemptible
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.section .text.02, "ax", %progbits
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.space (1024 * 1024)
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.section .text.03, "ax", %progbits
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.space (1024 * 1024)
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.section .text.04, "ax", %progbits
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.space (1024 * 1024)
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.section .text.05, "ax", %progbits
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.space (1024 * 1024)
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.section .text.06, "ax", %progbits
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.space (1024 * 1024)
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.section .text.07, "ax", %progbits
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.space (1024 * 1024)
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// 0x70000c + 8 + 0x60002c = 0xd00040 = preemptible@plt
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// CHECK: 000000000070000c __ARMV5PILongThunk_preemptible:
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// CHECK-NEXT: 70000c: 0b 00 18 ea b #6291500
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.section .text.08, "ax", %progbits
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.space (1024 * 1024) - 4
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.section .text.10, "ax", %progbits
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.balign 2
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bl preemptible
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bl preemptible2
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// 0x80000c + 4 - 100004 = 0x70000c = __ARMv5PILongThunk_preemptible
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// CHECK-CALL: 80000c: ff f6 fe ef blx #-1048580
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.balign 2
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.globl preemptible
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.type preemptible, %function
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preemptible:
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bx lr
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.globl preemptible2
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.type preemptible2, %function
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preemptible2:
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bx lr
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.section .text.11, "ax", %progbits
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.space (5 * 1024 * 1024)
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// CHECK-PLT: Disassembly of section .plt:
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// CHECK-PLT-NEXT: 0000000000d00020 $a:
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// CHECK-PLT-NEXT: d00020: 04 e0 2d e5 str lr, [sp, #-4]!
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// CHECK-PLT-NEXT: d00024: 00 e6 8f e2 add lr, pc, #0, #12
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// CHECK-PLT-NEXT: d00028: 01 ea 8e e2 add lr, lr, #4096
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// CHECK-PLT-NEXT: d0002c: dc ff be e5 ldr pc, [lr, #4060]!
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// CHECK-PLT: 0000000000d00030 $d:
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// CHECK-PLT-NEXT: d00030: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK-PLT-NEXT: d00034: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK-PLT-NEXT: d00038: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK-PLT-NEXT: d0003c: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK-PLT: 0000000000d00040 $a:
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// CHECK-PLT-NEXT: d00040: 00 c6 8f e2 add r12, pc, #0, #12
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// CHECK-PLT-NEXT: d00044: 01 ca 8c e2 add r12, r12, #4096
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// CHECK-PLT-NEXT: d00048: c4 ff bc e5 ldr pc, [r12, #4036]!
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// CHECK-PLT: 0000000000d0004c $d:
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// CHECK-PLT-NEXT: d0004c: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK-PLT: 0000000000d00050 $a:
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// CHECK-PLT-NEXT: d00050: 00 c6 8f e2 add r12, pc, #0, #12
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// CHECK-PLT-NEXT: d00054: 01 ca 8c e2 add r12, r12, #4096
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// CHECK-PLT-NEXT: d00058: b8 ff bc e5 ldr pc, [r12, #4024]!
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// CHECK-PLT: 0000000000d0005c $d:
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// CHECK-PLT-NEXT: d0005c: d4 d4 d4 d4 .word 0xd4d4d4d4
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