We have a special version of CpuExceptionHandlerLib for XCODE5, whose
linker (LLD) does not permit absolute symbol references in read-only
sections.
Instead of fixing this up at runtime for all toolchains (which is done
by writing the fixed up values to the .text section, which we'd prefer
to avoid), tweak the SEC/PEI version so it does not need this, and
update the remaining versions to only incorporate this logic when using
the XCODE toolchain.
Changes since v3:
- As Marvin points out, using '-read_only_relocs suppress' with the X64
XCODE linker is a terrible idea, as it corrupts the resulting PE
binaries, so instead, let's do the following:
. tweak the SEC/PEI version of the library so the relocs are emitted
into .data when using XCODE;
. tweak the other versions so the runtime fixups are only done when
using XCODE
- add acks from Jiewen and Ray
Changes since v2:
- pass linker switches to permit absolute relocations in read-only
regions, and keep all code in .text
Cc: "Ni, Ray" <ray...@intel.com>
Cc: Andrew Fish <af...@apple.com>
Cc: "Kinney, Michael D" <michael.d.kin...@intel.com>
Cc: "Liu, Zhiguang" <zhiguang....@intel.com>
Cc: Rebecca Cran <rebe...@bsdio.com>
Cc: Tom Lendacky <thomas.lenda...@amd.com>
Cc: Marvin Häuser <mhaeu...@posteo.de>
Ard Biesheuvel (5):
BaseTools/tools_def CLANGDWARF: Permit text relocations
UefiCpuPkg/CpuExceptionHandlerLib: Use single SEC/PEI version
UefiCpuPkg/CpuExceptionHandlerLib: Make runtime fixups XCODE-only
OvmfPkg: Drop special Xcode5 version of exception handler library
UefiCpuPkg/CpuExceptionHandlerLib: Drop special XCODE5 version
BaseTools/Conf/tools_def.template
| 2 +-
OvmfPkg/AmdSev/AmdSevX64.dsc
| 4 -
OvmfPkg/CloudHv/CloudHvX64.dsc
| 4 -
OvmfPkg/IntelTdx/IntelTdxX64.dsc
| 4 -
OvmfPkg/Microvm/MicrovmX64.dsc
| 4 -
OvmfPkg/OvmfPkgIa32.dsc
| 4 -
OvmfPkg/OvmfPkgIa32X64.dsc
| 4 -
OvmfPkg/OvmfPkgX64.dsc
| 4 -
OvmfPkg/OvmfXen.dsc
| 4 -
UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
| 5 +-
UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuExceptionHandlerLib.inf
| 4 +-
UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf
| 4 +-
UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmCpuExceptionHandlerLib.inf
| 4 +-
UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ExceptionHandlerAsm.nasm
| 116 +++++++++++++++++---
UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/{Xcode5ExceptionHandlerAsm.nasm
=> SecPeiExceptionHandlerAsm.nasm} | 108 +++---------------
UefiCpuPkg/Library/CpuExceptionHandlerLib/Xcode5SecPeiCpuExceptionHandlerLib.inf
| 65 -----------
UefiCpuPkg/Library/CpuExceptionHandlerLib/Xcode5SecPeiCpuExceptionHandlerLib.uni
| 18 ---
UefiCpuPkg/UefiCpuPkg.dsc
| 7 --
18 files changed, 133 insertions(+), 232 deletions(-)
rename
UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/{Xcode5ExceptionHandlerAsm.nasm
=> SecPeiExceptionHandlerAsm.nasm} (70%)
delete mode 100644
UefiCpuPkg/Library/CpuExceptionHandlerLib/Xcode5SecPeiCpuExceptionHandlerLib.inf
delete mode 100644
UefiCpuPkg/Library/CpuExceptionHandlerLib/Xcode5SecPeiCpuExceptionHandlerLib.uni
--
2.39.2
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