Reviewed-by: Liming Gao <gaolim...@byosoft.com.cn>
> -----邮件原件-----
> 发件人: Yeping Song <quic_yepi...@quicinc.com>
> 发送时间: 2023年11月4日 0:38
> 收件人: devel@edk2.groups.io
> 抄送: Yeping Song <quic_yepi...@quicinc.com>; Rebecca Cran
> <rebe...@bsdio.com>; Liming Gao <gaolim...@byosoft.com.cn>; Bob Feng
> <bob.c.f...@intel.com>; Yuwei Chen <yuwei.c...@intel.com>; Ard
> Biesheuvel <ardb+tianoc...@kernel.org>; Leif Lindholm
> <quic_llind...@quicinc.com>; Sami Mujawar <sami.muja...@arm.com>
> 主题: [PATCH 1/1] BaseTools/tools_def: drop -mgeneral-regs-only for
> AArch64 CLANGDWARF
>
> 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_yepi...@quicinc.com>
> Cc: Rebecca Cran <rebe...@bsdio.com>
> Cc: Liming Gao <gaolim...@byosoft.com.cn>
> Cc: Bob Feng <bob.c.f...@intel.com>
> Cc: Yuwei Chen <yuwei.c...@intel.com>
> Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org>
> Cc: Leif Lindholm <quic_llind...@quicinc.com>
> Cc: Sami Mujawar <sami.muja...@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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