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[ARM] Support .reloc *, R_ARM_NONE, *
R_ARM_NONE can be used to create references among sections. When --gc-sections is used, the referenced section will be retained if the origin section is retained. Add a generic MCFixupKind FK_NONE as this kind of no-op relocation is ubiquitous on ELF and COFF, and probably available on many other binary formats. See D62014. Reviewed By: peter.smith Differential Revision: https://reviews.llvm.org/D61992 llvm-svn: 360980
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# RUN: llvm-mc -triple=armv7-linux-gnueabi %s | FileCheck --check-prefix=PRINT %s | ||
# RUN: llvm-mc -triple=armv7eb-linux-gnueabi %s | FileCheck --check-prefix=PRINT %s | ||
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# RUN: llvm-mc -filetype=obj -triple=armv7-linux-gnueabi %s -o %t | ||
# RUN: llvm-readobj -r %t | FileCheck %s | ||
# RUN: llvm-readelf -x .data %t | FileCheck --check-prefix=HEX %s | ||
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# RUN: llvm-mc -filetype=obj -triple=armv7eb-linux-gnueabi %s -o %t | ||
# RUN: llvm-readobj -r %t | FileCheck %s | ||
# RUN: llvm-readelf -x .data %t | FileCheck --check-prefix=HEX %s | ||
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.text | ||
bx lr | ||
nop | ||
nop | ||
.reloc 8, R_ARM_NONE, .data | ||
.reloc 4, R_ARM_NONE, foo+4 | ||
.reloc 0, R_ARM_NONE, 8 | ||
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.data | ||
.globl foo | ||
foo: | ||
.word 0 | ||
.word 0 | ||
.word 0 | ||
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# PRINT: .reloc 8, R_ARM_NONE, .data | ||
# PRINT: .reloc 4, R_ARM_NONE, foo+4 | ||
# PRINT: .reloc 0, R_ARM_NONE, 8 | ||
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# ARM relocations use the Elf32_Rel format. Addends are neither stored in the | ||
# relocation entries nor applied in the referenced locations. | ||
# CHECK: 0x8 R_ARM_NONE .data 0x0 | ||
# CHECK-NEXT: 0x4 R_ARM_NONE foo 0x0 | ||
# CHECK-NEXT: 0x0 R_ARM_NONE - 0x0 | ||
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# HEX: 0x00000000 00000000 00000000 |