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llvm-project/clang/test/Driver/arm-execute-only.c

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[ARM] Implement execute-only support in CodeGen Summary: This implements execute-only support for ARM code generation, which prevents the compiler from generating data accesses to code sections. The following changes are involved: * Add the CodeGen option "-arm-execute-only" to the ARM code generator. * Add the clang flag "-mexecute-only" as well as the GCC-compatible alias "-mpure-code" to enable this option. * When enabled, literal pools are replaced with MOVW/MOVT instructions, with VMOV used in addition for floating-point literals. As the MOVT instruction is required, execute-only support is only available in Thumb mode for targets supporting ARMv8-M baseline or Thumb2. * Jump tables are placed in data sections when in execute-only mode. * The execute-only text section is assigned section ID 0, and is marked as unreadable with the SHF_ARM_PURECODE flag with symbol 'y'. This also overrides selection of ELF sections for globals. Reviewers: t.p.northover, rengolin Subscribers: llvm-commits, aemerson Differential Revision: https://reviews.llvm.org/D27450 llvm-svn: 289786
2016-12-15 15:59:24 +08:00
// RUN: not %clang -c -target thumbv6m-eabi -mexecute-only %s 2>&1 | \
// RUN: FileCheck --check-prefix CHECK-EXECUTE-ONLY-NOT-SUPPORTED %s
// RUN: not %clang -target armv8m.main-eabi -mexecute-only -mno-movt %s 2>&1 \
// RUN: | FileCheck %s -check-prefix CHECK-EXECUTE-ONLY-NO-MOVT
// RUN: not %clang -target armv8m.main-eabi -mexecute-only -mlong-calls %s 2>&1 \
// RUN: | FileCheck %s -check-prefix CHECK-EXECUTE-ONLY-LONG-CALLS
// -mpure-code flag for GCC compatibility
// RUN: not %clang -c -target thumbv6m-eabi -mpure-code %s 2>&1 | \
// RUN: FileCheck --check-prefix CHECK-EXECUTE-ONLY-NOT-SUPPORTED %s
// RUN: not %clang -target armv8m.main-eabi -mpure-code -mno-movt %s 2>&1 \
// RUN: | FileCheck %s -check-prefix CHECK-EXECUTE-ONLY-NO-MOVT
// RUN: not %clang -target armv8m.main-eabi -mpure-code -mlong-calls %s 2>&1 \
// RUN: | FileCheck %s -check-prefix CHECK-EXECUTE-ONLY-LONG-CALLS
[ARM] Don't pass -arm-execute-only to cc1as The option -mexecute-only is translated into the backend option -arm-execute-only. But this option only makes sense for the compiler and the assembler does not recognize it. This patch stops clang from passing this option to the assembler. Change-Id: I4f4cb1162c13cfd50a0a36702a4ecab1bc0324ba Review: https://reviews.llvm.org/D30414 llvm-svn: 296454
2017-02-28 17:09:53 +08:00
// RUN: %clang -target armv7m-eabi -x assembler -mexecute-only %s -c -### 2>&1 \
// RUN: | FileCheck %s -check-prefix CHECK-NO-EXECUTE-ONLY -check-prefix CHECK-NO-EXECUTE-ONLY-ASM
[ARM] Implement execute-only support in CodeGen Summary: This implements execute-only support for ARM code generation, which prevents the compiler from generating data accesses to code sections. The following changes are involved: * Add the CodeGen option "-arm-execute-only" to the ARM code generator. * Add the clang flag "-mexecute-only" as well as the GCC-compatible alias "-mpure-code" to enable this option. * When enabled, literal pools are replaced with MOVW/MOVT instructions, with VMOV used in addition for floating-point literals. As the MOVT instruction is required, execute-only support is only available in Thumb mode for targets supporting ARMv8-M baseline or Thumb2. * Jump tables are placed in data sections when in execute-only mode. * The execute-only text section is assigned section ID 0, and is marked as unreadable with the SHF_ARM_PURECODE flag with symbol 'y'. This also overrides selection of ELF sections for globals. Reviewers: t.p.northover, rengolin Subscribers: llvm-commits, aemerson Differential Revision: https://reviews.llvm.org/D27450 llvm-svn: 289786
2016-12-15 15:59:24 +08:00
//
[ARM] Add missing -backend-option for -arm-execute-only llvm-svn: 290110
2016-12-19 23:43:33 +08:00
// CHECK-NO-EXECUTE-ONLY-NOT: "-backend-option" "-arm-execute-only"
// CHECK-EXECUTE-ONLY: "-backend-option" "-arm-execute-only"
[ARM] Implement execute-only support in CodeGen Summary: This implements execute-only support for ARM code generation, which prevents the compiler from generating data accesses to code sections. The following changes are involved: * Add the CodeGen option "-arm-execute-only" to the ARM code generator. * Add the clang flag "-mexecute-only" as well as the GCC-compatible alias "-mpure-code" to enable this option. * When enabled, literal pools are replaced with MOVW/MOVT instructions, with VMOV used in addition for floating-point literals. As the MOVT instruction is required, execute-only support is only available in Thumb mode for targets supporting ARMv8-M baseline or Thumb2. * Jump tables are placed in data sections when in execute-only mode. * The execute-only text section is assigned section ID 0, and is marked as unreadable with the SHF_ARM_PURECODE flag with symbol 'y'. This also overrides selection of ELF sections for globals. Reviewers: t.p.northover, rengolin Subscribers: llvm-commits, aemerson Differential Revision: https://reviews.llvm.org/D27450 llvm-svn: 289786
2016-12-15 15:59:24 +08:00
// CHECK-EXECUTE-ONLY-NOT-SUPPORTED: error: execute only is not supported for the thumbv6m sub-architecture
// CHECK-EXECUTE-ONLY-NO-MOVT: error: option '-mexecute-only' cannot be specified with '-mno-movt'
// CHECK-EXECUTE-ONLY-LONG-CALLS: error: option '-mexecute-only' cannot be specified with '-mlong-calls'
[ARM] Don't pass -arm-execute-only to cc1as The option -mexecute-only is translated into the backend option -arm-execute-only. But this option only makes sense for the compiler and the assembler does not recognize it. This patch stops clang from passing this option to the assembler. Change-Id: I4f4cb1162c13cfd50a0a36702a4ecab1bc0324ba Review: https://reviews.llvm.org/D30414 llvm-svn: 296454
2017-02-28 17:09:53 +08:00
// CHECK-NO-EXECUTE-ONLY-ASM: warning: argument unused during compilation: '-mexecute-only'