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[mips] Correct ELF e_flags for the N32 ABI when using a mips-* triple rather than a mips64-* triple

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Summary:
Generally speaking, mips-* vs mips64-* should not be used to make decisions
about the content or format of the ELF. This should be based on the ABI
and CPU in use. For example, `mips-linux-gnu-clang -mips64r2 -mabi=64`
should produce an ELF64 as should `mips64-linux-gnu-clang -mabi=64`.
Conversely, `mips64-linux-gnu-clang -mabi=n32` should produce an ELF32 as
should `mips-linux-gnu-clang -mips64r2 -mabi=n32`.

This patch fixes the e_flags but leaves the ELF32 vs ELF64 issue for now
since there is no apparent way to base this decision on the ABI and CPU.

Differential Revision: http://reviews.llvm.org/D4539


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213244 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Sanders 2014-07-17 10:02:08 +00:00
parent 0a342e9992
commit 3da6527068
2 changed files with 18 additions and 21 deletions
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26
lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp
View File

@ -281,22 +281,18 @@ MipsTargetELFStreamer::MipsTargetELFStreamer(MCStreamer &S,
else
EFlags |= ELF::EF_MIPS_ARCH_1;
if (T.isArch64Bit()) {
if (Features & Mips::FeatureN32)
EFlags |= ELF::EF_MIPS_ABI2;
else if (Features & Mips::FeatureO32) {
EFlags |= ELF::EF_MIPS_ABI_O32;
EFlags |= ELF::EF_MIPS_32BITMODE; /* Compatibility Mode */
}
// No need to set any bit for N64 which is the default ABI at the moment
// for 64-bit Mips architectures.
} else {
if (Features & Mips::FeatureMips64r2 || Features & Mips::FeatureMips64)
EFlags |= ELF::EF_MIPS_32BITMODE;
// ABI
// ABI
// N64 does not require any ABI bits.
if (Features & Mips::FeatureO32)
EFlags |= ELF::EF_MIPS_ABI_O32;
}
else if (Features & Mips::FeatureN32)
EFlags |= ELF::EF_MIPS_ABI2;
if (Features & Mips::FeatureGP64Bit) {
if (Features & Mips::FeatureO32)
EFlags |= ELF::EF_MIPS_32BITMODE; /* Compatibility Mode */
} else if (Features & Mips::FeatureMips64r2 || Features & Mips::FeatureMips64)
EFlags |= ELF::EF_MIPS_32BITMODE;
// Other options.
if (Features & Mips::FeatureNaN2008)

13
test/MC/Mips/elf_eflags.s
View File

@ -2,22 +2,22 @@
# corresponding options (-mcpu=mips32 -> -mips32 for example).
# RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux -mcpu=mips64r6 %s -o -| llvm-readobj -h | FileCheck --check-prefix=MIPSEL-MIPS64R6 %s
# MIPSEL-MIPS64R6: Flags [ (0xA0001506)
# MIPSEL-MIPS64R6: Flags [ (0xA0000406)
# RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux -mcpu=mips64r6 -mattr=+nan2008 %s -o -| llvm-readobj -h | FileCheck --check-prefix=MIPSEL-MIPS64R6-NAN2008 %s
# MIPSEL-MIPS64R6-NAN2008: Flags [ (0xA0001506)
# MIPSEL-MIPS64R6-NAN2008: Flags [ (0xA0000406)
# RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux -mcpu=mips64r2 %s -o -| llvm-readobj -h | FileCheck --check-prefix=MIPSEL-MIPS64R2 %s
# MIPSEL-MIPS64R2: Flags [ (0x80001106)
# MIPSEL-MIPS64R2: Flags [ (0x80000006)
# RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux -mcpu=mips64r2 -mattr=+nan2008 %s -o -| llvm-readobj -h | FileCheck --check-prefix=MIPSEL-MIPS64R2-NAN2008 %s
# MIPSEL-MIPS64R2-NAN2008: Flags [ (0x80001506)
# MIPSEL-MIPS64R2-NAN2008: Flags [ (0x80000406)
# RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux -mcpu=mips64 %s -o -| llvm-readobj -h | FileCheck --check-prefix=MIPSEL-MIPS64 %s
# MIPSEL-MIPS64: Flags [ (0x60001106)
# MIPSEL-MIPS64: Flags [ (0x60000006)
# RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux -mcpu=mips64 -mattr=+nan2008 %s -o -| llvm-readobj -h | FileCheck --check-prefix=MIPSEL-MIPS64-NAN2008 %s
# MIPSEL-MIPS64-NAN2008: Flags [ (0x60001506)
# MIPSEL-MIPS64-NAN2008: Flags [ (0x60000406)
# RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux -mcpu=mips32r6 %s -o -| llvm-readobj -h | FileCheck --check-prefix=MIPSEL-MIPS32R6 %s
# MIPSEL-MIPS32R6: Flags [ (0x90001404)
@ -37,6 +37,7 @@
# RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux -mcpu=mips32 -mattr=+nan2008 %s -o -| llvm-readobj -h | FileCheck --check-prefix=MIPSEL-MIPS32-NAN2008 %s
# MIPSEL-MIPS32-NAN2008: Flags [ (0x50001404)
# RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux -mcpu=mips64r2 -mattr=-n64,n32 %s -o -| llvm-readobj -h | FileCheck --check-prefix=MIPS64EL-MIPS64R2-N32 %s
# RUN: llvm-mc -filetype=obj -triple mips64el-unknown-linux -mcpu=mips64r2 -mattr=-n64,n32 %s -o -| llvm-readobj -h | FileCheck --check-prefix=MIPS64EL-MIPS64R2-N32 %s
# MIPS64EL-MIPS64R2-N32: Flags [ (0x80000024)