cf783be8d7
(Fixed an issue about GOT on a copy relocated alias.) (Fixed an issue about not creating r_addend=0 IRELATIVE for unreferenced non-preemptible ifunc.) The idea is to make scanRelocations mark some actions are needed (GOT/PLT/etc) and postpone the real work to postScanRelocations. It gives some flexibility: * Make it feasible to support .plt.got (PR32938): we need to know whether GLOB_DAT and JUMP_SLOT are both needed. * Make non-preemptible IFUNC handling slightly cleaner: avoid setting/clearing sym.gotInIgot * -z nocopyrel: report all copy relocation places for one symbol * Make GOT deduplication feasible * Make parallel relocation scanning feasible (if we can avoid all stateful operations and make Symbol attributes atomic), but parallelism may not be the appealing choice Since this patch moves a large chunk of code out of ELFT templates. My x86-64 executable is actually a few hundred bytes smaller. For ppc32-ifunc-nonpreemptible-pic.s: I remove absolute relocation references to non-preemptible ifunc because absolute relocation references are incorrect in -fpie mode. Reviewed By: peter.smith, ikudrin Differential Revision: https://reviews.llvm.org/D114783
39 lines
894 B
ArmAsm
39 lines
894 B
ArmAsm
// REQUIRES: x86
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/// Test we correctly wrap PLT calls.
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// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t
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// RUN: ld.lld -o %t2 %t -wrap foo -shared
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// RUN: llvm-readobj -S -r %t2 | FileCheck %s
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// RUN: llvm-objdump -d %t2 | FileCheck --check-prefix=DISASM %s
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// CHECK: Relocations [
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// CHECK-NEXT: Section ({{.*}}) .rela.plt {
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// CHECK-NEXT: R_X86_64_JUMP_SLOT foo 0x0
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// CHECK-NEXT: R_X86_64_JUMP_SLOT __wrap_foo 0x0
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// CHECK-NEXT: R_X86_64_JUMP_SLOT _start 0x0
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// CHECK-NEXT: }
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// CHECK-NEXT: ]
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// DISASM: <_start>:
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// DISASM-NEXT: jmp {{.*}} <__wrap_foo@plt>
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// DISASM-NEXT: jmp {{.*}} <__wrap_foo@plt>
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// DISASM-NEXT: jmp {{.*}} <foo@plt>
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// DISASM-NEXT: jmp {{.*}} <_start@plt>
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.global foo
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foo:
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nop
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.global __wrap_foo
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__wrap_foo:
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nop
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.global _start
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_start:
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jmp foo@plt
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jmp __wrap_foo@plt
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jmp __real_foo@plt
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jmp _start@plt
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