87de9a0786
``` // llvm-objdump -d output (before) 400000: e8 0b 00 00 00 callq 11 400005: e8 0b 00 00 00 callq 11 // llvm-objdump -d output (after) 400000: e8 0b 00 00 00 callq 0x400010 400005: e8 0b 00 00 00 callq 0x400015 // GNU objdump -d. The lack of 0x is not ideal because the result cannot be re-assembled 400000: e8 0b 00 00 00 callq 400010 400005: e8 0b 00 00 00 callq 400015 ``` In llvm-objdump, we pass the address of the next MCInst. Ideally we should just thread the address of the current address, unfortunately we cannot call X86MCCodeEmitter::encodeInstruction (X86MCCodeEmitter requires MCInstrInfo and MCContext) to get the length of the MCInst. MCInstPrinter::printInst has other callers (e.g llvm-mc -filetype=asm, llvm-mca) which set Address to 0. They leave MCInstPrinter::PrintBranchImmAsAddress as false and this change is a no-op for them. Reviewed By: jhenderson Differential Revision: https://reviews.llvm.org/D76580
83 lines
2.3 KiB
ArmAsm
83 lines
2.3 KiB
ArmAsm
// REQUIRES: x86
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/// For non-preemptable ifunc, place ifunc PLT entries after regular PLT entries.
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// RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o
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// RUN: ld.lld --shared -o %t.so %t.o
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// RUN: llvm-objdump -d --no-show-raw-insn %t.so | FileCheck %s --check-prefix=DISASM
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// RUN: llvm-readobj -r %t.so | FileCheck %s
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// Check that an IRELATIVE relocation is used for a non-preemptible ifunc
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// handler and a JUMP_SLOT is used for a preemptible ifunc
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// DISASM: Disassembly of section .text:
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// DISASM-EMPTY:
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// DISASM-NEXT: <fct>:
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// DISASM-NEXT: 1308: retq
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// DISASM: <fct2>:
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// DISASM-NEXT: 1309: retq
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// DISASM: <f1>:
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// DISASM-NEXT: 130a: callq 0x1350
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// DISASM-NEXT: 130f: callq 0x1330
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// DISASM-NEXT: 1314: callq 0x1340
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// DISASM-NEXT: 1319: retq
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// DISASM: <f2>:
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// DISASM-NEXT: 131a: retq
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// DISASM-EMPTY:
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// DISASM-NEXT: Disassembly of section .plt:
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// DISASM-EMPTY:
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// DISASM-NEXT: <.plt>:
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// DISASM-NEXT: 1320: pushq 8482(%rip)
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// DISASM-NEXT: 1326: jmpq *8484(%rip)
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// DISASM-NEXT: 132c: nopl (%rax)
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// DISASM-EMPTY:
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// DISASM-NEXT: <fct2@plt>:
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// DISASM-NEXT: 1330: jmpq *8482(%rip)
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// DISASM-NEXT: 1336: pushq $0
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// DISASM-NEXT: 133b: jmp 0x1320 <.plt>
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// DISASM-EMPTY:
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// DISASM-NEXT: <f2@plt>:
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// DISASM-NEXT: 1340: jmpq *8474(%rip)
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// DISASM-NEXT: 1346: pushq $1
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// DISASM-NEXT: 134b: jmp 0x1320 <.plt>
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// DISASM: Disassembly of section .iplt:
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// DISASM-EMPTY:
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// DISASM: <.iplt>:
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// DISASM-NEXT: 1350: jmpq *8466(%rip)
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// DISASM-NEXT: 1356: pushq $0
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// DISASM-NEXT: 135b: jmp 0x1320 <.plt>
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// CHECK: Relocations [
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// CHECK-NEXT: Section (5) .rela.dyn {
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// CHECK-NEXT: 0x3468 R_X86_64_IRELATIVE - 0x1308
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// CHECK-NEXT: }
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// CHECK-NEXT: Section (6) .rela.plt {
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// CHECK-NEXT: 0x3458 R_X86_64_JUMP_SLOT fct2 0x0
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// CHECK-NEXT: 0x3460 R_X86_64_JUMP_SLOT f2 0x0
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// CHECK-NEXT: }
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// Hidden expect IRELATIVE
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.globl fct
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.hidden fct
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.type fct, STT_GNU_IFUNC
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fct:
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ret
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// Not hidden expect JUMP_SLOT
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.globl fct2
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.type fct2, STT_GNU_IFUNC
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fct2:
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ret
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.globl f1
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.type f1, @function
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f1:
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call fct
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call fct2
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call f2@PLT
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ret
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.globl f2
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.type f2, @function
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f2:
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ret
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