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llvm-project/lld/test/ELF/arm-plt-reloc.s

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// REQUIRES: arm
// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %p/Inputs/arm-plt-reloc.s -o %t1
// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t2
// RUN: ld.lld %t1 %t2 -o %t
// RUN: llvm-objdump --triple=armv7a-none-linux-gnueabi -d --no-show-raw-insn %t | FileCheck %s
// RUN: ld.lld -shared %t1 %t2 -o %t3
// RUN: llvm-objdump --triple=armv7a-none-linux-gnueabi -d --no-show-raw-insn %t3 | FileCheck --check-prefix=DSO %s
// RUN: llvm-readobj -S -r %t3 | FileCheck -check-prefix=DSOREL %s
//
// Test PLT entry generation
.syntax unified
.text
.align 2
.globl _start
.type _start,%function
_start:
b func1
bl func2
beq func3
// Executable, expect no PLT
// CHECK: Disassembly of section .text:
// CHECK-EMPTY:
// CHECK-NEXT: <func1>:
// CHECK-NEXT: 200b4: bx lr
// CHECK: <func2>:
// CHECK-NEXT: 200b8: bx lr
// CHECK: <func3>:
// CHECK-NEXT: 200bc: bx lr
// CHECK: <_start>:
// CHECK-NEXT: 200c0: b #-20 <func1>
// CHECK-NEXT: 200c4: bl #-20 <func2>
// CHECK-NEXT: 200c8: beq #-20 <func3>
// Expect PLT entries as symbols can be preempted
// The .got.plt and .plt displacement is small so we can use small PLT entries.
// DSO: Disassembly of section .text:
// DSO-EMPTY:
// DSO-NEXT: <func1>:
// DSO-NEXT: 10214: bx lr
// DSO: <func2>:
// DSO-NEXT: 10218: bx lr
// DSO: <func3>:
// DSO-NEXT: 1021c: bx lr
// DSO: <_start>:
// S(0x10214) - P(0x10220) + A(-8) = 0x2c = 32
// DSO-NEXT: 10220: b #40
// S(0x10218) - P(0x10224) + A(-8) = 0x38 = 56
// DSO-NEXT: 10224: bl #52
// S(0x1021c) - P(0x10228) + A(-8) = 0x44 = 68
// DSO-NEXT: 10228: beq #64
// DSO-EMPTY:
// DSO-NEXT: Disassembly of section .plt:
// DSO-EMPTY:
// DSO-NEXT: <$a>:
// DSO-NEXT: 10230: str lr, [sp, #-4]!
// (0x10234 + 8) + (0 RoR 12) + 8192 + 164 = 0x32e0 = .got.plt[2]
// DSO-NEXT: 10234: add lr, pc, #0, #12
// DSO-NEXT: 10238: add lr, lr, #32
// DSO-NEXT: 1023c: ldr pc, [lr, #164]!
// DSO: <$d>:
// DSO-NEXT: 10240: d4 d4 d4 d4 .word 0xd4d4d4d4
// DSO-NEXT: 10244: d4 d4 d4 d4 .word 0xd4d4d4d4
// DSO-NEXT: 10248: d4 d4 d4 d4 .word 0xd4d4d4d4
// DSO-NEXT: 1024c: d4 d4 d4 d4 .word 0xd4d4d4d4
// DSO: <$a>:
// (0x10250 + 8) + (0 RoR 12) + 8192 + 140 = 0x32e4
// DSO-NEXT: 10250: add r12, pc, #0, #12
// DSO-NEXT: 10254: add r12, r12, #32
// DSO-NEXT: 10258: ldr pc, [r12, #140]!
// DSO: <$d>:
// DSO-NEXT: 1025c: d4 d4 d4 d4 .word 0xd4d4d4d4
// DSO: <$a>:
// (0x10260 + 8) + (0 RoR 12) + 8192 + 128 = 0x32e8
// DSO-NEXT: 10260: add r12, pc, #0, #12
// DSO-NEXT: 10264: add r12, r12, #32
// DSO-NEXT: 10268: ldr pc, [r12, #128]!
// DSO: <$d>:
// DSO-NEXT: 1026c: d4 d4 d4 d4 .word 0xd4d4d4d4
// DSO: <$a>:
// (0x10270 + 8) + (0 RoR 12) + 8192 + 116 = 0x32ec
// DSO-NEXT: 10270: add r12, pc, #0, #12
// DSO-NEXT: 10274: add r12, r12, #32
// DSO-NEXT: 10278: ldr pc, [r12, #116]!
// DSO: <$d>:
// DSO-NEXT: 1027c: d4 d4 d4 d4 .word 0xd4d4d4d4
// DSOREL: Name: .got.plt
// DSOREL-NEXT: Type: SHT_PROGBITS
// DSOREL-NEXT: Flags [
// DSOREL-NEXT: SHF_ALLOC
// DSOREL-NEXT: SHF_WRITE
// DSOREL-NEXT: ]
// DSOREL-NEXT: Address: 0x302D8
// DSOREL-NEXT: Offset:
// DSOREL-NEXT: Size: 24
// DSOREL-NEXT: Link:
// DSOREL-NEXT: Info:
// DSOREL-NEXT: AddressAlignment: 4
// DSOREL-NEXT: EntrySize:
// DSOREL: Relocations [
// DSOREL-NEXT: Section {{.*}} .rel.plt {
// DSOREL-NEXT: 0x302E4 R_ARM_JUMP_SLOT func1 0x0
// DSOREL-NEXT: 0x302E8 R_ARM_JUMP_SLOT func2 0x0
// DSOREL-NEXT: 0x302EC R_ARM_JUMP_SLOT func3 0x0
// Test a large separation between the .plt and .got.plt
// The .got.plt and .plt displacement is large but still within the range
// of the short plt sequence.
// RUN: echo "SECTIONS { \
// RUN: .text 0x1000 : { *(.text) } \
// RUN: .plt 0x2000 : { *(.plt) *(.plt.*) } \
// RUN: .got.plt 0x1100000 : { *(.got.plt) } \
// RUN: }" > %t.script
// RUN: ld.lld --hash-style=sysv --script %t.script -shared %t1 %t2 -o %t4
// RUN: llvm-objdump --triple=armv7a-none-linux-gnueabi -d --no-show-raw-insn %t4 | FileCheck --check-prefix=CHECKHIGH %s
// RUN: llvm-readobj -S -r %t4 | FileCheck --check-prefix=DSORELHIGH %s
// CHECKHIGH: Disassembly of section .text:
// CHECKHIGH-EMPTY:
// CHECKHIGH-NEXT: <func1>:
// CHECKHIGH-NEXT: 1000: bx lr
// CHECKHIGH: <func2>:
// CHECKHIGH-NEXT: 1004: bx lr
// CHECKHIGH: <func3>:
// CHECKHIGH-NEXT: 1008: bx lr
// CHECKHIGH: <_start>:
// CHECKHIGH-NEXT: 100c: b #4108 <$a>
// CHECKHIGH-NEXT: 1010: bl #4120 <$a>
// CHECKHIGH-NEXT: 1014: beq #4132 <$a>
// CHECKHIGH-EMPTY:
// CHECKHIGH-NEXT: Disassembly of section .plt:
// CHECKHIGH-EMPTY:
// CHECKHIGH-NEXT: <$a>:
// CHECKHIGH-NEXT: 2000: str lr, [sp, #-4]!
// CHECKHIGH-NEXT: 2004: add lr, pc, #16, #12
// CHECKHIGH-NEXT: 2008: add lr, lr, #1036288
// CHECKHIGH-NEXT: 200c: ldr pc, [lr, #4092]!
// CHECKHIGH: <$d>:
// CHECKHIGH-NEXT: 2010: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKHIGH-NEXT: 2014: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKHIGH-NEXT: 2018: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKHIGH-NEXT: 201c: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKHIGH: <$a>:
// CHECKHIGH-NEXT: 2020: add r12, pc, #16, #12
// CHECKHIGH-NEXT: 2024: add r12, r12, #1036288
// CHECKHIGH-NEXT: 2028: ldr pc, [r12, #4068]!
// CHECKHIGH: <$d>:
// CHECKHIGH-NEXT: 202c: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKHIGH: <$a>:
// CHECKHIGH-NEXT: 2030: add r12, pc, #16, #12
// CHECKHIGH-NEXT: 2034: add r12, r12, #1036288
// CHECKHIGH-NEXT: 2038: ldr pc, [r12, #4056]!
// CHECKHIGH: <$d>:
// CHECKHIGH-NEXT: 203c: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKHIGH: <$a>:
// CHECKHIGH-NEXT: 2040: add r12, pc, #16, #12
// CHECKHIGH-NEXT: 2044: add r12, r12, #1036288
// CHECKHIGH-NEXT: 2048: ldr pc, [r12, #4044]!
// CHECKHIGH: <$d>:
// CHECKHIGH-NEXT: 204c: d4 d4 d4 d4 .word 0xd4d4d4d4
// DSORELHIGH: Name: .got.plt
// DSORELHIGH-NEXT: Type: SHT_PROGBITS
// DSORELHIGH-NEXT: Flags [
// DSORELHIGH-NEXT: SHF_ALLOC
// DSORELHIGH-NEXT: SHF_WRITE
// DSORELHIGH-NEXT: ]
// DSORELHIGH-NEXT: Address: 0x1100000
// DSORELHIGH: Relocations [
// DSORELHIGH-NEXT: Section {{.*}} .rel.plt {
// DSORELHIGH-NEXT: 0x110000C R_ARM_JUMP_SLOT func1 0x0
// DSORELHIGH-NEXT: 0x1100010 R_ARM_JUMP_SLOT func2 0x0
// DSORELHIGH-NEXT: 0x1100014 R_ARM_JUMP_SLOT func3 0x0
// Test a very large separation between the .plt and .got.plt so we must use
// large plt entries that do not have any range restriction.
// RUN: echo "SECTIONS { \
// RUN: .text 0x1000 : { *(.text) } \
// RUN: .plt 0x2000 : { *(.plt) *(.plt.*) } \
// RUN: .got.plt 0x11111100 : { *(.got.plt) } \
// RUN: }" > %t2.script
// RUN: ld.lld --hash-style=sysv --script %t2.script -shared %t1 %t2 -o %t5
// RUN: llvm-objdump --triple=armv7a-none-linux-gnueabi -d --no-show-raw-insn %t5 | FileCheck --check-prefix=CHECKLONG %s
// RUN: llvm-readobj -S -r %t5 | FileCheck --check-prefix=DSORELLONG %s
// CHECKLONG: Disassembly of section .text:
// CHECKLONG-EMPTY:
// CHECKLONG-NEXT: <func1>:
// CHECKLONG-NEXT: 1000: bx lr
// CHECKLONG: <func2>:
// CHECKLONG-NEXT: 1004: bx lr
// CHECKLONG: <func3>:
// CHECKLONG-NEXT: 1008: bx lr
// CHECKLONG: <_start>:
// CHECKLONG-NEXT: 100c: b #4108 <$a>
// CHECKLONG-NEXT: 1010: bl #4120 <$a>
// CHECKLONG-NEXT: 1014: beq #4132 <$a>
// CHECKLONG-EMPTY:
// CHECKLONG-NEXT: Disassembly of section .plt:
// CHECKLONG-EMPTY:
// CHECKLONG-NEXT: <$a>:
// CHECKLONG-NEXT: 2000: str lr, [sp, #-4]!
// CHECKLONG-NEXT: 2004: ldr lr, [pc, #4]
// CHECKLONG-NEXT: 2008: add lr, pc, lr
// CHECKLONG-NEXT: 200c: ldr pc, [lr, #8]!
// CHECKLONG: <$d>:
// CHECKLONG-NEXT: 2010: f0 f0 10 11 .word 0x1110f0f0
// CHECKLONG-NEXT: 2014: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKLONG-NEXT: 2018: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKLONG-NEXT: 201c: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKLONG: <$a>:
// CHECKLONG-NEXT: 2020: ldr r12, [pc, #4]
// CHECKLONG-NEXT: 2024: add r12, r12, pc
// CHECKLONG-NEXT: 2028: ldr pc, [r12]
// CHECKLONG: <$d>:
// CHECKLONG-NEXT: 202c: e0 f0 10 11 .word 0x1110f0e0
// CHECKLONG: <$a>:
// CHECKLONG-NEXT: 2030: ldr r12, [pc, #4]
// CHECKLONG-NEXT: 2034: add r12, r12, pc
// CHECKLONG-NEXT: 2038: ldr pc, [r12]
// CHECKLONG: <$d>:
// CHECKLONG-NEXT: 203c: d4 f0 10 11 .word 0x1110f0d4
// CHECKLONG: <$a>:
// CHECKLONG-NEXT: 2040: ldr r12, [pc, #4]
// CHECKLONG-NEXT: 2044: add r12, r12, pc
// CHECKLONG-NEXT: 2048: ldr pc, [r12]
// CHECKLONG: <$d>:
// CHECKLONG-NEXT: 204c: c8 f0 10 11 .word 0x1110f0c8
// DSORELLONG: Name: .got.plt
// DSORELLONG-NEXT: Type: SHT_PROGBITS
// DSORELLONG-NEXT: Flags [
// DSORELLONG-NEXT: SHF_ALLOC
// DSORELLONG-NEXT: SHF_WRITE
// DSORELLONG-NEXT: ]
// DSORELLONG-NEXT: Address: 0x11111100
// DSORELLONG: Relocations [
// DSORELLONG-NEXT: Section {{.*}} .rel.plt {
// DSORELLONG-NEXT: 0x1111110C R_ARM_JUMP_SLOT func1 0x0
// DSORELLONG-NEXT: 0x11111110 R_ARM_JUMP_SLOT func2 0x0
// DSORELLONG-NEXT: 0x11111114 R_ARM_JUMP_SLOT func3 0x0
// Test a separation between the .plt and .got.plt that is part in range of
// short table entries and part needing long entries. We use the long entries
// only when we need to.
// RUN: echo "SECTIONS { \
// RUN: .text 0x1000 : { *(.text) } \
// RUN: .plt 0x2000 : { *(.plt) *(.plt.*) } \
// RUN: .got.plt 0x8002020 : { *(.got.plt) } \
// RUN: }" > %t3.script
// RUN: ld.lld --hash-style=sysv --script %t3.script -shared %t1 %t2 -o %t6
// RUN: llvm-objdump --triple=armv7a-none-linux-gnueabi -d --no-show-raw-insn %t6 | FileCheck --check-prefix=CHECKMIX %s
// RUN: llvm-readobj -S -r %t6 | FileCheck --check-prefix=DSORELMIX %s
// CHECKMIX: Disassembly of section .text:
// CHECKMIX-EMPTY:
// CHECKMIX-NEXT: <func1>:
// CHECKMIX-NEXT: 1000: bx lr
// CHECKMIX: <func2>:
// CHECKMIX-NEXT: 1004: bx lr
// CHECKMIX: <func3>:
// CHECKMIX-NEXT: 1008: bx lr
// CHECKMIX: <_start>:
// CHECKMIX-NEXT: 100c: b #4108 <$a>
// CHECKMIX-NEXT: 1010: bl #4120 <$a>
// CHECKMIX-NEXT: 1014: beq #4132 <$a>
// CHECKMIX-EMPTY:
// CHECKMIX-NEXT: Disassembly of section .plt:
// CHECKMIX-EMPTY:
// CHECKMIX-NEXT: <$a>:
// CHECKMIX-NEXT: 2000: str lr, [sp, #-4]!
// CHECKMIX-NEXT: 2004: ldr lr, [pc, #4]
// CHECKMIX-NEXT: 2008: add lr, pc, lr
// CHECKMIX-NEXT: 200c: ldr pc, [lr, #8]!
// CHECKMIX: <$d>:
// CHECKMIX-NEXT: 2010: 10 00 00 08 .word 0x08000010
// CHECKMIX-NEXT: 2014: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKMIX-NEXT: 2018: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKMIX-NEXT: 201c: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKMIX: <$a>:
// CHECKMIX-NEXT: 2020: ldr r12, [pc, #4]
// CHECKMIX-NEXT: 2024: add r12, r12, pc
// CHECKMIX-NEXT: 2028: ldr pc, [r12]
// CHECKMIX: <$d>:
// CHECKMIX-NEXT: 202c: 00 00 00 08 .word 0x08000000
// CHECKMIX: <$a>:
// CHECKMIX-NEXT: 2030: add r12, pc, #133169152
// CHECKMIX-NEXT: 2034: add r12, r12, #1044480
// CHECKMIX-NEXT: 2038: ldr pc, [r12, #4088]!
// CHECKMIX: <$d>:
// CHECKMIX-NEXT: 203c: d4 d4 d4 d4 .word 0xd4d4d4d4
// CHECKMIX: <$a>:
// CHECKMIX-NEXT: 2040: add r12, pc, #133169152
// CHECKMIX-NEXT: 2044: add r12, r12, #1044480
// CHECKMIX-NEXT: 2048: ldr pc, [r12, #4076]!
// CHECKMIX: <$d>:
// CHECKMIX-NEXT: 204c: d4 d4 d4 d4 .word 0xd4d4d4d4
// DSORELMIX: Name: .got.plt
// DSORELMIX-NEXT: Type: SHT_PROGBITS
// DSORELMIX-NEXT: Flags [
// DSORELMIX-NEXT: SHF_ALLOC
// DSORELMIX-NEXT: SHF_WRITE
// DSORELMIX-NEXT: ]
// DSORELMIX-NEXT: Address: 0x8002020
// DSORELMIX: Section {{.*}} .rel.plt {
// DSORELMIX-NEXT: 0x800202C R_ARM_JUMP_SLOT func1 0x0
// DSORELMIX-NEXT: 0x8002030 R_ARM_JUMP_SLOT func2 0x0
// DSORELMIX-NEXT: 0x8002034 R_ARM_JUMP_SLOT func3 0x0
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