derek.holloway
7502bf64a4
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103 lines
3.1 KiB
ArmAsm
103 lines
3.1 KiB
ArmAsm
# REQUIRES: riscv
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# RUN: llvm-mc -filetype=obj -triple=riscv64 /dev/null -o %t2.o
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# RUN: ld.lld -shared -soname=t2 %t2.o -o %t2.so
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# RUN: llvm-mc -filetype=obj -triple=riscv64 %s -o %t.o
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# RUN: llvm-readobj -r %t.o | FileCheck --check-prefix=RELOC %s
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# RUN: ld.lld -e absolute %t.o -o %t
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# RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck --check-prefixes=CHECK,PC %s
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# RUN: llvm-readelf -x .data %t | FileCheck --check-prefixes=HEX,HEX-WITHOUT-PLT %s
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# RUN: ld.lld -e absolute %t.o -o %t %t2.so
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# RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck --check-prefixes=CHECK,PLT %s
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# RUN: llvm-readelf -x .data %t | FileCheck --check-prefixes=HEX,HEX-WITH-PLT %s
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.option exact
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.weak target
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.global absolute, relative, branch
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## Absolute relocations are resolved to 0.
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# RELOC: 0x0 R_RISCV_HI20 target 0x1
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# RELOC-NEXT: 0x4 R_RISCV_LO12_I target 0x1
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# CHECK-LABEL: <absolute>:
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# CHECK-NEXT: lui t0, 0x0
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# CHECK-NEXT: addi t0, t0, 0x1
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absolute:
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lui t0, %hi(target+1)
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addi t0, t0, %lo(target+1)
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## Currently, PC-relative relocations are resolved to 0.
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# RELOC-NEXT: 0x8 R_RISCV_PCREL_HI20 target 0x0
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# RELOC-NEXT: 0xC R_RISCV_PCREL_LO12_I .Lpcrel_hi0 0x0
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# RELOC-NEXT: 0x10 R_RISCV_PCREL_HI20 target 0x2
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# RELOC-NEXT: 0x14 R_RISCV_PCREL_LO12_S .Lpcrel_hi1 0x0
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## 1048559 should be -0x11.
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# CHECK-LABEL: <relative>:
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# CHECK-NEXT: 11{{...}}: auipc a1, 0xfffef
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# PC-NEXT: addi a1, a1, -0x160
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# PLT-NEXT: addi a1, a1, -0x290
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# CHECK-LABEL: <.Lpcrel_hi1>:
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# CHECK-NEXT: 11{{...}}: auipc t1, 0xfffef
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# PC-NEXT: sd a2, -0x166(t1)
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# PLT-NEXT: sd a2, -0x296(t1)
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relative:
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la a1, target
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sd a2, target+2, t1
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## Branch relocations
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## If .dynsym does not exist, an undefined weak symbol is non-preemptible.
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## Treat them as PC relative relocations.
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# RELOC: 0x18 R_RISCV_CALL_PLT target 0x0
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# RELOC-NEXT: 0x20 R_RISCV_JAL target 0x0
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# RELOC-NEXT: 0x24 R_RISCV_BRANCH target 0x0
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# PC-LABEL: <branch>:
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# PC-NEXT: auipc ra, 0x0
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# PC-NEXT: jalr ra
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# PC-NEXT: [[#%x,ADDR:]]:
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# PC-SAME: j 0x[[#ADDR]]
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# PC-NEXT: [[#%x,ADDR:]]:
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# PC-SAME: beqz zero, 0x[[#ADDR]]
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## If .dynsym exists, an undefined weak symbol is preemptible.
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## We create a PLT entry and redirect the reference to it.
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# PLT-LABEL: <branch>:
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# PLT-NEXT: auipc ra, 0x0
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# PLT-NEXT: jalr 0x30(ra)
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# PLT-NEXT: [[#%x,ADDR:]]:
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# PLT-SAME: j 0x[[#ADDR]]
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# PLT-NEXT: [[#%x,ADDR:]]:
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# PLT-SAME: beqz zero, 0x[[#ADDR]]
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branch:
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call target
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jal x0, target
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beq x0, x0, target
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## Absolute relocations are resolved to 0.
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# RELOC: 0x0 R_RISCV_64 target 0x3
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# RELOC-NEXT: 0x8 R_RISCV_32 target 0x4
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# RELOC-NEXT: 0xC R_RISCV_PLT32 target 0x0
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# HEX: section '.data':
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# HEX-NEXT: 03000000 00000000 04000000
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# HEX-WITHOUT-PLT-SAME: 00000000
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## A plt entry is created for target, so this is the offset between the
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## plt entry and this address.
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##
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## S - A + P = -0x0x20ec = 0xffffdf14
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# HEX-WITH-PLT-SAME: 14dfffff
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.data
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.p2align 3
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.quad target+3
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.long target+4
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# PC-NOT: .plt:
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# PLT: .plt:
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.word %pltpcrel(target)
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