Re: [edk2-devel] [PATCH 1/1] BaseTools/tools_def: drop -mgeneral-regs-only for AArch64 CLANGDWARF

["Leif Lindholm" <quic_llindhol@quicinc.com>]

Liming,

You reviewed this patch before the stable tag. Am I OK to stage a github 
PR for this change?

Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>

Regards,

Leif

On 2023-11-07 13:11, Yeping Song (QUIC) wrote:
> Hi all,
> I would like for this to be include in stable tag. Please help to review and merge this patch into stable release.
> Thanks
> Yepings
> 
> 
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Yeping Song
> Sent: Saturday, November 4, 2023 12:38 AM
> To: devel@edk2.groups.io
> Cc: Yeping Song (QUIC) <quic_yepings@quicinc.com>; Rebecca Cran <rebecca@bsdio.com>; Liming Gao <gaoliming@byosoft.com.cn>; Bob Feng <bob.c.feng@intel.com>; Yuwei Chen <yuwei.chen@intel.com>; Ard Biesheuvel <ardb+tianocore@kernel.org>; Leif Lindholm (QUIC) <quic_llindhol@quicinc.com>; Sami Mujawar <sami.mujawar@arm.com>
> Subject: [edk2-devel] [PATCH 1/1] BaseTools/tools_def: drop -mgeneral-regs-only for AArch64 CLANGDWARF
> 
> WARNING: This email originated from outside of Qualcomm. Please be wary of any links or attachments, and do not enable macros.
> 
> Commit 0df6c8c157af9 ("BaseTools/tools_def AARCH64:
> avoid SIMD registers in XIP code")
> adds -mgeneral-regs-only to GCC_AARCH64_CC_XIPFLAGS, in order to avoid a bug present in certain versions of GCC.
> This was never a problem for clang.
> That's given the history of what the problem is.
> Then we can describe how we fix it:
> Change *_CLANGDWARF_AARCH64_CC_XIPFLAGS to set the required -mstrict-align option instead of importing the whole GCC variable.
> 
> Signed-off-by: Yeping Song <quic_yepings@quicinc.com>
> Cc: Rebecca Cran <rebecca@bsdio.com>
> Cc: Liming Gao <gaoliming@byosoft.com.cn>
> Cc: Bob Feng <bob.c.feng@intel.com>
> Cc: Yuwei Chen <yuwei.chen@intel.com>
> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
> Cc: Leif Lindholm <quic_llindhol@quicinc.com>
> Cc: Sami Mujawar <sami.mujawar@arm.com>
> ---
>   BaseTools/Conf/tools_def.template | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
> index 5bd5283655ea..c34ecfd557c5 100755
> --- a/BaseTools/Conf/tools_def.template
> +++ b/BaseTools/Conf/tools_def.template
> @@ -2015,7 +2015,7 @@ DEFINE CLANGDWARF_AARCH64_DLINK_FLAGS  = DEF(CLANGDWARF_AARCH64_TARGET) DEF(GCC_
>   *_CLANGDWARF_AARCH64_RC_FLAGS       = DEF(GCC_AARCH64_RC_FLAGS) DEF(GCC_AARCH64_RC_BTI_FLAGS)
>   *_CLANGDWARF_AARCH64_VFRPP_FLAGS    = DEF(GCC_VFRPP_FLAGS) DEF(CLANGDWARF_AARCH64_TARGET) $(PLATFORM_FLAGS)
>   *_CLANGDWARF_AARCH64_ASLPP_FLAGS    = DEF(GCC_ASLPP_FLAGS) DEF(CLANGDWARF_AARCH64_TARGET)
> -*_CLANGDWARF_AARCH64_CC_XIPFLAGS    = DEF(GCC_AARCH64_CC_XIPFLAGS)
> +*_CLANGDWARF_AARCH64_CC_XIPFLAGS    = -mstrict-align
> 
>     DEBUG_CLANGDWARF_AARCH64_CC_FLAGS    = DEF(CLANGDWARF_AARCH64_CC_FLAGS) $(PLATFORM_FLAGS) -flto -O1
>     DEBUG_CLANGDWARF_AARCH64_DLINK_FLAGS = DEF(CLANGDWARF_AARCH64_DLINK_FLAGS) -flto -Wl,-O1 -fuse-ld=lld -L$(WORKSPACE)/ArmPkg/Library/GccLto -llto-aarch64 -Wl,-plugin-opt=-pass-through=-llto-aarch64 -Wl,--no-pie,--no-relax
> --
> 2.25.1
> 
> 
> 
> 
> 
> 



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