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[ELF] Remove -Wl,-z,notext hint
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The hint does not pull its weight:

* adding -Wl,-z,notext often won't work (relocation types other than `symbolRel`, e.g. `R_AARCH64_LDST32_ABS_LO12_NC`)
* for pure (no assembly) C/C++ projects, the "-fPIC" hint is sufficient
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MaskRay committed Oct 31, 2021
1 parent 81a6eab commit 55e69ec
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Showing 31 changed files with 39 additions and 58 deletions.
17 changes: 4 additions & 13 deletions lld/ELF/Relocations.cpp
Expand Up @@ -1095,19 +1095,10 @@ static void processRelocAux(InputSectionBase &sec, RelExpr expr, RelType type,
}

if (config->isPic) {
if (!canWrite && !isRelExpr(expr))
errorOrWarn(
"can't create dynamic relocation " + toString(type) + " against " +
(sym.getName().empty() ? "local symbol"
: "symbol: " + toString(sym)) +
" in readonly segment; recompile object files with -fPIC "
"or pass '-Wl,-z,notext' to allow text relocations in the output" +
getLocation(sec, sym, offset));
else
errorOrWarn(
"relocation " + toString(type) + " cannot be used against " +
(sym.getName().empty() ? "local symbol" : "symbol " + toString(sym)) +
"; recompile with -fPIC" + getLocation(sec, sym, offset));
errorOrWarn("relocation " + toString(type) + " cannot be used against " +
(sym.getName().empty() ? "local symbol"
: "symbol '" + toString(sym) + "'") +
"; recompile with -fPIC" + getLocation(sec, sym, offset));
return;
}

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2 changes: 1 addition & 1 deletion lld/test/ELF/aarch64-abs32-dyn.s
Expand Up @@ -4,7 +4,7 @@

## Test we don't create R_AARCH64_RELATIVE.

# CHECK: error: relocation R_AARCH64_ABS32 cannot be used against symbol hidden; recompile with -fPIC
# CHECK: error: relocation R_AARCH64_ABS32 cannot be used against symbol 'hidden'; recompile with -fPIC

.globl hidden
.hidden hidden
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2 changes: 1 addition & 1 deletion lld/test/ELF/aarch64-fpic-abs16.s
@@ -1,7 +1,7 @@
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-freebsd %s -o %t.o
// RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s
// CHECK: relocation R_AARCH64_ABS16 cannot be used against symbol foo; recompile with -fPIC
// CHECK: relocation R_AARCH64_ABS16 cannot be used against symbol 'foo'; recompile with -fPIC
// CHECK-NEXT: >>> defined in {{.*}}.o
// CHECK-NEXT: >>> referenced by {{.*}}.o:(.data+0x0)

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2 changes: 1 addition & 1 deletion lld/test/ELF/aarch64-fpic-add_abs_lo12_nc.s
@@ -1,7 +1,7 @@
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-freebsd %s -o %t.o
// RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s
// CHECK: can't create dynamic relocation R_AARCH64_ADD_ABS_LO12_NC against symbol: dat in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
// CHECK: error: relocation R_AARCH64_ADD_ABS_LO12_NC cannot be used against symbol 'dat'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}.o
// CHECK: >>> referenced by {{.*}}.o:(.text+0x0)

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2 changes: 1 addition & 1 deletion lld/test/ELF/aarch64-fpic-adr_prel_lo21.s
@@ -1,7 +1,7 @@
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-freebsd %s -o %t.o
// RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s
// CHECK: relocation R_AARCH64_ADR_PREL_LO21 cannot be used against symbol dat; recompile with -fPIC
// CHECK: error: relocation R_AARCH64_ADR_PREL_LO21 cannot be used against symbol 'dat'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}.o
// CHECK: >>> referenced by {{.*}}.o:(.text+0x0)

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4 changes: 2 additions & 2 deletions lld/test/ELF/aarch64-fpic-adr_prel_pg_hi21.s
@@ -1,10 +1,10 @@
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-freebsd %s -o %t.o
// RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s
// CHECK: relocation R_AARCH64_ADR_PREL_PG_HI21 cannot be used against symbol dat; recompile with -fPIC
// CHECK: error: relocation R_AARCH64_ADR_PREL_PG_HI21 cannot be used against symbol 'dat'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}.o
// CHECK: >>> referenced by {{.*}}.o:(.text+0x0)
// CHECK: relocation R_AARCH64_ADR_PREL_PG_HI21_NC cannot be used against symbol dat; recompile with -fPIC
// CHECK: error: relocation R_AARCH64_ADR_PREL_PG_HI21_NC cannot be used against symbol 'dat'; recompile with -fPIC

adrp x0, dat
adrp x0, :pg_hi21_nc:dat
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2 changes: 1 addition & 1 deletion lld/test/ELF/aarch64-fpic-ldst32_abs_lo12_nc.s
@@ -1,7 +1,7 @@
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-freebsd %s -o %t.o
// RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s
// CHECK: can't create dynamic relocation R_AARCH64_LDST32_ABS_LO12_NC against symbol: dat in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
// CHECK: error: relocation R_AARCH64_LDST32_ABS_LO12_NC cannot be used against symbol 'dat'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}.o
// CHECK: >>> referenced by {{.*}}.o:(.text+0x0)

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2 changes: 1 addition & 1 deletion lld/test/ELF/aarch64-fpic-ldst64_abs_lo12_nc.s
@@ -1,7 +1,7 @@
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-freebsd %s -o %t.o
// RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s
// CHECK: can't create dynamic relocation R_AARCH64_LDST64_ABS_LO12_NC against symbol: dat in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
// CHECK: error: relocation R_AARCH64_LDST64_ABS_LO12_NC cannot be used against symbol 'dat'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}.o
// CHECK: >>> referenced by {{.*}}.o:(.text+0x0)

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2 changes: 1 addition & 1 deletion lld/test/ELF/aarch64-fpic-ldst8_abs_lo12_nc.s
@@ -1,7 +1,7 @@
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-freebsd %s -o %t.o
// RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s
// CHECK: can't create dynamic relocation R_AARCH64_LDST8_ABS_LO12_NC against symbol: dat in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
// CHECK: error: relocation R_AARCH64_LDST8_ABS_LO12_NC cannot be used against symbol 'dat'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}.o
// CHECK: >>> referenced by {{.*}}.o:(.text+0x0)

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2 changes: 1 addition & 1 deletion lld/test/ELF/aarch64-fpic-prel16.s
@@ -1,7 +1,7 @@
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-freebsd %s -o %t.o
// RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s
// CHECK: R_AARCH64_PREL16 cannot be used against symbol foo; recompile with -fPIC
// CHECK: R_AARCH64_PREL16 cannot be used against symbol 'foo'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}
// CHECK: >>> referenced by {{.*}}:(.data+0x0)

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2 changes: 1 addition & 1 deletion lld/test/ELF/aarch64-fpic-prel32.s
@@ -1,7 +1,7 @@
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-freebsd %s -o %t.o
// RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s
// CHECK: relocation R_AARCH64_PREL32 cannot be used against symbol foo; recompile with -fPIC
// CHECK: error: relocation R_AARCH64_PREL32 cannot be used against symbol 'foo'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}
// CHECK: >>> referenced by {{.*}}:(.data+0x0)

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2 changes: 1 addition & 1 deletion lld/test/ELF/aarch64-fpic-prel64.s
@@ -1,7 +1,7 @@
// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64-none-freebsd %s -o %t.o
// RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s
// CHECK: relocation R_AARCH64_PREL64 cannot be used against symbol foo; recompile with -fPIC
// CHECK: error: relocation R_AARCH64_PREL64 cannot be used against symbol 'foo'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}
// CHECK: >>> referenced by {{.*}}:(.data+0x0)

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2 changes: 1 addition & 1 deletion lld/test/ELF/arm-target1.s
Expand Up @@ -32,6 +32,6 @@
// RELATIVE: <$d.0>:
// RELATIVE: 10150: 04 00 00 00 .word 0x00000004

// ABS: can't create dynamic relocation R_ARM_TARGET1 against symbol: patatino in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
// ABS: relocation R_ARM_TARGET1 cannot be used against symbol 'patatino'; recompile with -fPIC
// ABS: >>> defined in {{.*}}.o
// ABS: >>> referenced by {{.*}}.o:(.text+0x0)
2 changes: 1 addition & 1 deletion lld/test/ELF/copy-in-shared.s
Expand Up @@ -4,7 +4,7 @@
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t2.o
// RUN: not ld.lld %t2.o %t1.so -o /dev/null -shared 2>&1 | FileCheck %s

// CHECK: can't create dynamic relocation R_X86_64_64 against symbol: foo in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
// CHECK: error: relocation R_X86_64_64 cannot be used against symbol 'foo'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}.so
// CHECK: >>> referenced by {{.*}}.o:(.text+0x0)

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10 changes: 0 additions & 10 deletions lld/test/ELF/dynamic-reloc-in-ro.s

This file was deleted.

2 changes: 1 addition & 1 deletion lld/test/ELF/eh-frame-dyn-rel.s
Expand Up @@ -2,7 +2,7 @@
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
// RUN: not ld.lld %t.o %t.o -o /dev/null -shared 2>&1 | FileCheck %s

// CHECK: can't create dynamic relocation R_X86_64_64 against symbol: foo in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
// CHECK: error: relocation R_X86_64_64 cannot be used against symbol 'foo'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}.o
// CHECK: >>> referenced by {{.*}}.o:(.eh_frame+0x12)

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2 changes: 1 addition & 1 deletion lld/test/ELF/linkerscript/symbol-location.s
Expand Up @@ -5,7 +5,7 @@

## Here we check that symbol 'foo' location is reported properly.

# CHECK: error: relocation R_X86_64_PC32 cannot be used against symbol foo
# CHECK: error: relocation R_X86_64_PC32 cannot be used against symbol 'foo'
# CHECK: >>> defined in {{.*}}.script:1
# CHECK: >>> referenced by {{.*}}.o:(.text+0x1)

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4 changes: 2 additions & 2 deletions lld/test/ELF/mips-eh_frame-pic.s
Expand Up @@ -10,7 +10,7 @@
# RUN: not ld.lld -shared %t-nopic.o -o /dev/null 2>&1 | FileCheck %s --check-prefix=NOPIC-ERR
## Note: ld.bfd can link this file because it rewrites the .eh_frame section to use
## relative addressing.
# NOPIC-ERR: ld.lld: error: can't create dynamic relocation R_MIPS_64 against local symbol in readonly segment
# NOPIC-ERR: ld.lld: error: relocation R_MIPS_64 cannot be used against local symbol

## For -fPIC, .eh_frame should contain DW_EH_PE_pcrel | DW_EH_PE_sdata4 values:
# RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux --position-independent %s -o %t-pic.o
Expand All @@ -25,7 +25,7 @@
# RUN: not ld.lld -shared %t-nopic32.o -o /dev/null 2>&1 | FileCheck %s --check-prefix=NOPIC32-ERR
## Note: ld.bfd can link this file because it rewrites the .eh_frame section to use
## relative addressing.
# NOPIC32-ERR: ld.lld: error: can't create dynamic relocation R_MIPS_32 against local symbol in readonly segment
# NOPIC32-ERR: ld.lld: error: relocation R_MIPS_32 cannot be used against local symbol

## For -fPIC, .eh_frame should contain DW_EH_PE_pcrel | DW_EH_PE_sdata4 values:
# RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux --position-independent %s -o %t-pic32.o
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2 changes: 1 addition & 1 deletion lld/test/ELF/ppc64-abs32-dyn.s
Expand Up @@ -4,7 +4,7 @@

## Test we don't create R_AARCH64_RELATIVE.

# CHECK: error: relocation R_PPC64_ADDR32 cannot be used against symbol hidden; recompile with -fPIC
# CHECK: error: relocation R_PPC64_ADDR32 cannot be used against symbol 'hidden'; recompile with -fPIC

.globl hidden
.hidden hidden
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2 changes: 1 addition & 1 deletion lld/test/ELF/relocation-size-err.s
Expand Up @@ -2,7 +2,7 @@
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
// RUN: not ld.lld %t.o -o /dev/null -shared 2>&1 | FileCheck %s

// CHECK: error: can't create dynamic relocation R_X86_64_SIZE64 against symbol: foo in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
// CHECK: error: relocation R_X86_64_SIZE64 cannot be used against symbol 'foo'; recompile with -fPIC

.global foo
foo:
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2 changes: 1 addition & 1 deletion lld/test/ELF/riscv-gp.s
Expand Up @@ -22,7 +22,7 @@
# DIS: 1000: auipc gp, 3
# DIS-NEXT: addi gp, gp, -2048

# ERR: error: relocation R_RISCV_PCREL_HI20 cannot be used against symbol __global_pointer$; recompile with -fPIC
# ERR: error: relocation R_RISCV_PCREL_HI20 cannot be used against symbol '__global_pointer$'; recompile with -fPIC

lla gp, __global_pointer$

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2 changes: 1 addition & 1 deletion lld/test/ELF/riscv-reloc-64-pic.s
Expand Up @@ -2,7 +2,7 @@
# RUN: llvm-mc -filetype=obj -triple=riscv64 %s -o %t.o
# RUN: not ld.lld -shared %t.o -o /dev/null 2>&1 | FileCheck %s

# CHECK: error: relocation R_RISCV_32 cannot be used against symbol a
# CHECK: error: relocation R_RISCV_32 cannot be used against symbol 'a'

.globl a

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4 changes: 2 additions & 2 deletions lld/test/ELF/vs-diagnostics-dynamic-relocation.s
Expand Up @@ -2,12 +2,12 @@
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
// RUN: not ld.lld -shared --vs-diagnostics %t.o -o /dev/null 2>&1 | FileCheck %s

// CHECK: dyn.s(15): error: can't create dynamic relocation R_X86_64_64 against local symbol in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
// CHECK: dyn.s(15): error: relocation R_X86_64_64 cannot be used against local symbol; recompile with -fPIC
// CHECK-NEXT: >>> defined in {{.*}}.o
// CHECK-NEXT: >>> referenced by dyn.s:15
// CHECK-NEXT: >>>{{.*}}.o:(.text+0x{{.+}})

// CHECK: /tmp{{/|\\}}dyn.s(20): error: can't create dynamic relocation {{.*}}
// CHECK: /tmp{{/|\\}}dyn.s(20): error: relocation R_X86_64_64 cannot be used against local symbol; recompile with -fPIC
// CHECK-NEXT: >>> defined in {{.*}}.o
// CHECK-NEXT: >>> referenced by dyn.s:20 (/tmp{{/|\\}}dyn.s:20)
// CHECK-NEXT: >>>{{.*}}.o:(.text+0x{{.+}})
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2 changes: 1 addition & 1 deletion lld/test/ELF/x86-64-dyn-rel-error.s
Expand Up @@ -9,7 +9,7 @@ _start:
.data
.long zed

// CHECK: relocation R_X86_64_32 cannot be used against symbol zed; recompile with -fPIC
// CHECK: error: relocation R_X86_64_32 cannot be used against symbol 'zed'; recompile with -fPIC

// RUN: ld.lld --noinhibit-exec %t.o %t2.so -o /dev/null 2>&1 | FileCheck --check-prefix=WARN %s
// RUN: not ld.lld --export-dynamic --unresolved-symbols=ignore-all %t.o -o /dev/null 2>&1 | FileCheck --check-prefix=WARN %s
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2 changes: 1 addition & 1 deletion lld/test/ELF/x86-64-dyn-rel-error2.s
Expand Up @@ -4,7 +4,7 @@
// RUN: ld.lld %t2.o -shared -o %t2.so
// RUN: not ld.lld -shared %t.o %t2.so -o /dev/null 2>&1 | FileCheck %s

// CHECK: relocation R_X86_64_PC32 cannot be used against symbol zed; recompile with -fPIC
// CHECK: error: relocation R_X86_64_PC32 cannot be used against symbol 'zed'; recompile with -fPIC
// CHECK: >>> defined in {{.*}}.so
// CHECK: >>> referenced by {{.*}}.o:(.data+0x0)

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8 changes: 4 additions & 4 deletions lld/test/ELF/x86-64-dyn-rel-error3.s
Expand Up @@ -2,10 +2,10 @@
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
# RUN: not ld.lld %t.o -shared -o /dev/null 2>&1 | FileCheck %s

# CHECK: relocation R_X86_64_8 cannot be used against symbol foo; recompile with -fPIC
# CHECK: relocation R_X86_64_16 cannot be used against symbol foo; recompile with -fPIC
# CHECK: relocation R_X86_64_PC8 cannot be used against symbol foo; recompile with -fPIC
# CHECK: relocation R_X86_64_PC16 cannot be used against symbol foo; recompile with -fPIC
# CHECK: error: relocation R_X86_64_8 cannot be used against symbol 'foo'; recompile with -fPIC
# CHECK: error: relocation R_X86_64_16 cannot be used against symbol 'foo'; recompile with -fPIC
# CHECK: error: relocation R_X86_64_PC8 cannot be used against symbol 'foo'; recompile with -fPIC
# CHECK: error: relocation R_X86_64_PC16 cannot be used against symbol 'foo'; recompile with -fPIC

.global foo

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2 changes: 1 addition & 1 deletion lld/test/ELF/x86-64-dyn-rel-error5.s
Expand Up @@ -18,7 +18,7 @@ hidden:
# CHECK: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC

# PIE: error: cannot preempt symbol: hidden
# SHARED: error: relocation R_X86_64_32 cannot be used against symbol hidden; recompile with -fPIC
# SHARED: error: relocation R_X86_64_32 cannot be used against symbol 'hidden'; recompile with -fPIC

.data
.byte local # R_X86_64_8
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2 changes: 1 addition & 1 deletion lld/test/ELF/x86-64-reloc-32.s
Expand Up @@ -5,7 +5,7 @@
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %t/shared.s -o %t/shared.o
# RUN: not ld.lld -shared %t/shared.o -o /dev/null 2>&1 | FileCheck %s

# CHECK: relocation R_X86_64_32 cannot be used against symbol _shared; recompile with -fPIC
# CHECK: error: relocation R_X86_64_32 cannot be used against symbol '_shared'; recompile with -fPIC
# CHECK: >>> defined in {{.*}}
# CHECK: >>> referenced by {{.*}}:(.data+0x0)

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2 changes: 1 addition & 1 deletion lld/test/ELF/x86-64-reloc-pc32.s
Expand Up @@ -5,7 +5,7 @@
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %t/shared.s -o %t/shared.o
# RUN: not ld.lld -shared %t/shared.o -o /dev/null 2>&1 | FileCheck %s

# CHECK: relocation R_X86_64_PC32 cannot be used against symbol _shared; recompile with -fPIC
# CHECK: error: relocation R_X86_64_PC32 cannot be used against symbol '_shared'; recompile with -fPIC
# CHECK: >>> defined in {{.*}}
# CHECK: >>> referenced by {{.*}}:(.data+0x1)

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2 changes: 1 addition & 1 deletion lld/test/ELF/znotext-weak-undef.s
@@ -1,7 +1,7 @@
# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
# RUN: not ld.lld -z notext -shared %t.o -o /dev/null 2>&1 | FileCheck %s
# CHECK: relocation R_X86_64_32 cannot be used against symbol foo; recompile with -fPIC
# CHECK: error: relocation R_X86_64_32 cannot be used against symbol 'foo'; recompile with -fPIC

# RUN: ld.lld -z notext %t.o -o %t
# RUN: llvm-readobj -r %t | FileCheck %s --check-prefix=EXE
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2 changes: 1 addition & 1 deletion lld/test/ELF/ztext.s
Expand Up @@ -12,7 +12,7 @@

# RUN: not ld.lld %t.o %t2.so -o /dev/null -shared 2>&1 | FileCheck --check-prefix=ERR %s
# RUN: not ld.lld -z text %t.o %t2.so -o /dev/null -shared 2>&1 | FileCheck --check-prefix=ERR %s
# ERR: error: can't create dynamic relocation
# ERR: error: relocation R_X86_64_64 cannot be used against symbol 'bar'; recompile with -fPIC

# If the preference is to have text relocations, don't create plt of copy relocations.

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