4645311933
Two code paths may reach the EHFrame case in SectionBase::getOffset: * .eh_frame reference * relocation copy for --emit-relocs The first may be used by clang_rt.crtbegin.o and GCC crtbeginT.o to get the start address of the output .eh_frame. The relocation has an offset of 0 or (x86-64 PC-relative leaq for clang_rt.crtbegin.o) -4. The current code just returns `offset`, which handles this case well. The second is related to InputSection::copyRelocations on .eh_frame (used by --emit-relocs). .eh_frame pieces may be dropped due to GC/ICF, so we should convert the input offset to the output offset. Use the same way as MergeInputSection with a special case handling outSecOff==-1 for an invalid piece (see eh-frame-marker.s). This exposes an issue in mips64-eh-abs-reloc.s that we don't reliably handle anyway. Just add --no-check-dynamic-relocations to paper over it. Differential Revision: https://reviews.llvm.org/D122459
32 lines
971 B
ArmAsm
32 lines
971 B
ArmAsm
// REQUIRES: x86
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// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
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// RUN: echo '.cfi_startproc; .cfi_endproc' | llvm-mc -filetype=obj -triple=x86_64 - -o %t2.o
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// RUN: ld.lld %t.o %t2.o -o %t
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// RUN: llvm-readobj -S %t | FileCheck %s
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// RUN: llvm-objdump -d --print-imm-hex %t | FileCheck --check-prefix=DISASM %s
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// CHECK: Name: .eh_frame
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// CHECK-NEXT: Type: SHT_PROGBITS
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// CHECK-NEXT: Flags [
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// CHECK-NEXT: SHF_ALLOC
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// CHECK-NEXT: ]
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// CHECK-NEXT: Address: 0x200120
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// CHECK-NEXT: Offset:
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// CHECK-NEXT: Size: 52
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// CHECK-NOT: .eh_frame
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// DISASM: Disassembly of section .text:
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// DISASM-EMPTY:
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// DISASM-NEXT: <_start>:
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// DISASM-NEXT: movq 0x200120, %rax
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// DISASM-NEXT: leaq {{.*}}(%rip), %rax # {{.*}} <__EH_FRAME_LIST__>
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.section .eh_frame,"a",@unwind
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__EH_FRAME_LIST__:
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.section .text
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.globl _start
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_start:
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movq .eh_frame, %rax # addend=0
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leaq __EH_FRAME_LIST__(%rip), %rax # addend=-4, used by libclang_rt.crtbegin.o
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