derek.holloway
7502bf64a4
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70 lines
3.6 KiB
ArmAsm
70 lines
3.6 KiB
ArmAsm
# REQUIRES: mips
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## Check that we can link a shared library containing an eh_frame section without
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## -z notext. This was not possible LLVM started emitting values using the
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## DW_EH_PE_pcrel | DW_EH_PE_sdata4 encoding.
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## It should not be possible to link code compiled without -fPIC:
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# RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux %s -o %t-nopic.o
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# RUN: llvm-dwarfdump --eh-frame %t-nopic.o | FileCheck %s --check-prefix=ABS64-EH-FRAME
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# RUN: llvm-readobj -r %t-nopic.o | FileCheck %s --check-prefixes=RELOCS,ABS64-RELOCS
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# RUN: not ld.lld -shared %t-nopic.o -o /dev/null 2>&1 | FileCheck %s --check-prefix=NOPIC-ERR
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## Note: ld.bfd can link this file because it rewrites the .eh_frame section to use
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## relative addressing.
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# NOPIC-ERR: ld.lld: error: relocation R_MIPS_64 cannot be used against local symbol
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## For -fPIC, .eh_frame should contain DW_EH_PE_pcrel | DW_EH_PE_sdata4 values:
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# RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux --position-independent %s -o %t-pic.o
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# RUN: llvm-readobj -r %t-pic.o | FileCheck %s --check-prefixes=RELOCS,PIC64-RELOCS
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# RUN: ld.lld -shared %t-pic.o -o %t-pic.so
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# RUN: llvm-dwarfdump --eh-frame %t-pic.so | FileCheck %s --check-prefix=PIC64-EH-FRAME
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## Also check MIPS32:
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# RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux %s -o %t-nopic32.o
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# RUN: llvm-dwarfdump --eh-frame %t-nopic32.o | FileCheck %s --check-prefix=ABS32-EH-FRAME
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# RUN: llvm-readobj -r %t-nopic32.o | FileCheck %s --check-prefixes=RELOCS,ABS32-RELOCS
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# RUN: not ld.lld -shared %t-nopic32.o -o /dev/null 2>&1 | FileCheck %s --check-prefix=NOPIC32-ERR
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## Note: ld.bfd can link this file because it rewrites the .eh_frame section to use
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## relative addressing.
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# NOPIC32-ERR: ld.lld: error: relocation R_MIPS_32 cannot be used against local symbol
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## https://github.com/llvm/llvm-project/issues/88852: getFdePc should return a
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## 32-bit address.
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# RUN: ld.lld --eh-frame-hdr -Ttext=0x80000000 %t-nopic32.o -o %t-nopic32
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# RUN: llvm-readelf -x .eh_frame_hdr %t-nopic32 | FileCheck %s --check-prefix=NOPIC32-HDR
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## For -fPIC, .eh_frame should contain DW_EH_PE_pcrel | DW_EH_PE_sdata4 values:
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# RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux --position-independent %s -o %t-pic32.o
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# RUN: llvm-readobj -r %t-pic32.o | FileCheck %s --check-prefixes=RELOCS,PIC32-RELOCS
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# RUN: ld.lld -shared %t-pic32.o -o %t-pic32.so
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# RUN: llvm-dwarfdump --eh-frame %t-pic32.so | FileCheck %s --check-prefix=PIC32-EH-FRAME
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# RELOCS: .rel{{a?}}.eh_frame {
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# ABS32-RELOCS-NEXT: 0x1C R_MIPS_32 .text
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# ABS64-RELOCS-NEXT: 0x1C R_MIPS_64/R_MIPS_NONE/R_MIPS_NONE .text
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# PIC64-RELOCS-NEXT: 0x1C R_MIPS_PC32/R_MIPS_NONE/R_MIPS_NONE .L0
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# PIC32-RELOCS-NEXT: 0x1C R_MIPS_PC32 .L0
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# RELOCS-NEXT: }
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# ABS64-EH-FRAME: Augmentation data: 0C
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## ^^ fde pointer encoding: DW_EH_PE_sdata8
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# ABS32-EH-FRAME: Augmentation data: 0B
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## ^^ fde pointer encoding: DW_EH_PE_sdata4
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# PIC32-EH-FRAME: Augmentation data: 1B
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## ^^ fde pointer encoding: DW_EH_PE_pcrel | DW_EH_PE_sdata4
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# PIC64-EH-FRAME: Augmentation data: 1B
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## ^^ fde pointer encoding: DW_EH_PE_pcrel | DW_EH_PE_sdata4
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## Note: ld.bfd converts the R_MIPS_64 relocs to DW_EH_PE_pcrel | DW_EH_PE_sdata8
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## for N64 ABI (and DW_EH_PE_pcrel | DW_EH_PE_sdata4 for MIPS32)
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# NOPIC32-HDR: Hex dump of section '.eh_frame_hdr':
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# NOPIC32-HDR: 0x80010038 011b033b 00000010 00000001 fffeffc8 .
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# NOPIC32-HDR: 0x80010048 00000028 .
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.ent func
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.global func
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func:
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.cfi_startproc
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nop
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.cfi_endproc
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.end func
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