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Re: [PATCH v2 7/8] travis: Add ARM thumb target to tests
From: |
Leif Lindholm |
Subject: |
Re: [PATCH v2 7/8] travis: Add ARM thumb target to tests |
Date: |
Tue, 14 May 2019 15:06:44 +0100 |
User-agent: |
NeoMutt/20170113 (1.7.2) |
On Tue, May 14, 2019 at 06:32:06AM -0700, Alexander Graf wrote:
> > But, wait...
> > arm-linux-gnueabi is the softfloat (v5te) toolchain - if we want to
> > test that, fine - but we definitely need to test arm-linux-gnueabihf.
> >
> > First of all, I would expect that this toolchain will not use T32
> > (Thumb-2) instructions by default, so much of the code will end up
> > being compiled as A32 anyway.
>
>
> Yeah, that's why we don't need to pass in -marm I guess. But I also
> don't see an explicit hardfloat cross gcc on kernel.org?
>
> https://mirrors.kernel.org/pub/tools/crosstool/files/bin/x86_64/8.1.0/
Urgh.
Yeah, so the default output of that toolchain gives
File Attributes
Tag_CPU_name: "5T"
Tag_CPU_arch: v5T
Tag_ARM_ISA_use: Yes
Tag_THUMB_ISA_use: Thumb-1
In theory, you should be OK just adding
"-mfloat-abi=hard -march=armv7-a+vfpv3-d16" to CFLAGS, since we're not
using any toolchain-provided libraries:
Tag_CPU_name: "7-A"
Tag_CPU_arch: v7
Tag_CPU_arch_profile: Application
Tag_ARM_ISA_use: Yes
Tag_THUMB_ISA_use: Thumb-2
Tag_FP_arch: VFPv3-D16
Tag_ABI_PCS_wchar_t: 4
Tag_ABI_FP_denormal: Needed
Tag_ABI_FP_exceptions: Needed
Tag_ABI_FP_number_model: IEEE 754
Tag_ABI_align_needed: 8-byte
Tag_ABI_align_preserved: 8-byte, except leaf SP
Tag_ABI_enum_size: int
Tag_ABI_VFP_args: VFP registers
/
Leif
[PATCH v2 8/8] travis: Test module loading from tftp as well, Alexander Graf, 2019/05/02
[PATCH v2 2/8] travis: Fix sparc64 test, Alexander Graf, 2019/05/02
[PATCH v2 4/8] travis: Fix arm coreboot test and make loop more robus, Alexander Graf, 2019/05/02
[PATCH v2 5/8] arm coreboot: Use common directory path, Alexander Graf, 2019/05/02
[PATCH v2 1/8] travis: Run bootstrap instead of autogen.sh, Alexander Graf, 2019/05/02