acc5db2bed
When generating armv6-m (Thumb1) Position Independent (PI) code
there are currently some code sequences that are not compatible
with eXecute-Only (XO) code.
For example, this simple code sequence when compiler for XO & PI:
extern int x;
int fn() { return x; }
is a problem as the address of x is currently loaded by:
ldr r0, .L0
:
:
.L0:
.long x
which is not XO compiant as this involves reading the value at
.L0 which is in the code section. Generating correct code is
currently hindered by lack of suitable relocations.
Disallow the generation of armv6-m PI code together with XO code
until they can be made to work together.
Differential Revision: https://reviews.llvm.org/D157620
47 lines
3.1 KiB
C
47 lines
3.1 KiB
C
// RUN: %clang --sysroot=%S/Inputs -c -fdriver-only -Werror --target=arm-arm-none-eabi \
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// RUN: -march=armv6-m -mexecute-only %s 2>&1 | count 0
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// RUN: not %clang -### -c --target=arm-arm-none-eabi -march=armv6 -mexecute-only %s 2>&1 | \
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// RUN: FileCheck --check-prefix CHECK-EXECUTE-ONLY-NOT-SUPPORTED %s
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// CHECK-EXECUTE-ONLY-NOT-SUPPORTED: error: execute only is not supported for the armv6 sub-architecture
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// RUN: not %clang -### --target=arm-arm-none-eabi -march=armv8-m.main -mexecute-only -mno-movt %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix CHECK-EXECUTE-ONLY-NO-MOVT
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// CHECK-EXECUTE-ONLY-NO-MOVT: error: option '-mexecute-only' cannot be specified with '-mno-movt'
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// RUN: %clang -### --target=arm-arm-none-eabi -march=armv7-m -x assembler -mexecute-only %s -c -### 2>&1 \
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// RUN: | FileCheck %s --check-prefix=CHECK-NO-EXECUTE-ONLY-ASM
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// CHECK-NO-EXECUTE-ONLY-ASM: warning: argument unused during compilation: '-mexecute-only'
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// -mpure-code flag for GCC compatibility
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// RUN: not %clang -### -c --target=arm-arm-none-eabi -march=armv6 -mpure-code %s 2>&1 | \
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// RUN: FileCheck --check-prefix CHECK-EXECUTE-ONLY-NOT-SUPPORTED %s
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// RUN: not %clang -### --target=arm-arm-none-eabi -march=armv8-m.main -mpure-code -mno-movt %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix CHECK-PURE-CODE-NO-MOVT
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// CHECK-PURE-CODE-NO-MOVT: error: option '-mpure-code' cannot be specified with '-mno-movt'
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// RUN: not %clang -### --target=arm-arm-none-eabi -march=armv6-m -mexecute-only -fropi %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix CHECK-NO-EXECUTE-ROPI
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// CHECK-NO-EXECUTE-ROPI: error: option '-mexecute-only' cannot be specified with '-fropi' for the thumbv6m sub-architecture
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// RUN: not %clang -### --target=arm-arm-none-eabi -march=armv6-m -mexecute-only -frwpi %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix CHECK-NO-EXECUTE-RWPI
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// CHECK-NO-EXECUTE-RWPI: error: option '-mexecute-only' cannot be specified with '-frwpi' for the thumbv6m sub-architecture
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// RUN: not %clang -### --target=arm-arm-none-eabi -march=armv6-m -mexecute-only -fpic %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix CHECK-NO-EXECUTE-PIC
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// CHECK-NO-EXECUTE-PIC: error: option '-mexecute-only' cannot be specified with '-fpic' for the thumbv6m sub-architecture
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// RUN: not %clang -### --target=arm-arm-none-eabi -march=armv6-m -mexecute-only -fpie %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix CHECK-NO-EXECUTE-PIE
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// CHECK-NO-EXECUTE-PIE: error: option '-mexecute-only' cannot be specified with '-fpie' for the thumbv6m sub-architecture
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// RUN: not %clang -### --target=arm-arm-none-eabi -march=armv6-m -mexecute-only -fPIC %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix CHECK-NO-EXECUTE-PIC2
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// CHECK-NO-EXECUTE-PIC2: error: option '-mexecute-only' cannot be specified with '-fPIC' for the thumbv6m sub-architecture
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// RUN: not %clang -### --target=arm-arm-none-eabi -march=armv6-m -mexecute-only -fPIE %s 2>&1 \
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// RUN: | FileCheck %s -check-prefix CHECK-NO-EXECUTE-PIE2
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// CHECK-NO-EXECUTE-PIE2: error: option '-mexecute-only' cannot be specified with '-fPIE' for the thumbv6m sub-architecture
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