BaseTools: Use SEH exceptions in CLANGPDB for IA32

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2628

This patch reduces the size of IA32 binaries by ensuring that
no .debug_frame / .eh_frame sections are generated through forcing
SEH exception model, which is already the default in clang for X64.

EDK II does not support exceptions, and in future we should disable
them instead of switching to some other variant. Currently this
is not possible due to the following LLVM bugs:

https://bugs.llvm.org/show_bug.cgi?id=45324
https://bugs.llvm.org/show_bug.cgi?id=45325

Upon applying this patch OvmfPkgIA32.dsc compilation in DEBUG mode
gets the following size decrease with clang 9.0.1.

Before: FV Space Information
SECFV [11%Full] 212992 total, 24512 used, 188480 free
PEIFV [22%Full] 917504 total, 203048 used, 714456 free
DXEFV [36%Full] 11534336 total, 4215672 used, 7318664 free
FVMAIN_COMPACT [37%Full] 3440640 total, 1287776 used, 2152864 free

After: FV Space Information
SECFV [10%Full] 212992 total, 22112 used, 190880 free
PEIFV [19%Full] 917504 total, 176392 used, 741112 free
DXEFV [31%Full] 11534336 total, 3657112 used, 7877224 free
FVMAIN_COMPACT [33%Full] 3440640 total, 1153896 used, 2286744 free

Cc: Liming Gao <liming.gao@intel.com>
Cc: Marvin H?user <mhaeuser@outlook.de>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Vitaly Cheptsov <vit9696@protonmail.com>

1 files changed, 7 insertions, 7 deletions

diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
index 2b17d3b297..88d7ab8cab 100755
--- a/BaseTools/Conf/tools_def.template
+++ b/BaseTools/Conf/tools_def.template
@@ -2759,7 +2759,7 @@ DEFINE CLANGPDB_IA32_TARGET          = -target i686-unknown-windows-gnu
 DEFINE CLANGPDB_X64_TARGET           = -target x86_64-unknown-windows-gnu

 

 DEFINE CLANGPDB_WARNING_OVERRIDES    = -Wno-parentheses-equality -Wno-tautological-compare -Wno-tautological-constant-out-of-range-compare -Wno-empty-body -Wno-unused-const-variable -Wno-varargs -Wno-unknown-warning-option -Wno-microsoft-enum-forward-reference

-DEFINE CLANGPDB_ALL_CC_FLAGS         = DEF(GCC48_ALL_CC_FLAGS) DEF(CLANGPDB_WARNING_OVERRIDES) -fno-stack-protector -funsigned-char -ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -Wno-address -Wno-shift-negative-value -Wno-unknown-pragmas -Wno-incompatible-library-redeclaration -Wno-null-dereference -mno-implicit-float -mms-bitfields -mno-stack-arg-probe -nostdlib -nostdlibinc

+DEFINE CLANGPDB_ALL_CC_FLAGS         = DEF(GCC48_ALL_CC_FLAGS) DEF(CLANGPDB_WARNING_OVERRIDES) -fno-stack-protector -funsigned-char -ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -Wno-address -Wno-shift-negative-value -Wno-unknown-pragmas -Wno-incompatible-library-redeclaration -Wno-null-dereference -mno-implicit-float -mms-bitfields -mno-stack-arg-probe -nostdlib -nostdlibinc -fseh-exceptions

 

 ###########################

 # CLANGPDB IA32 definitions

@@ -2784,15 +2784,15 @@ DEFINE CLANGPDB_ALL_CC_FLAGS         = DEF(GCC48_ALL_CC_FLAGS) DEF(CLANGPDB_WARN
 *_CLANGPDB_IA32_VFRPP_FLAGS          = DEF(GCC_VFRPP_FLAGS) DEF(CLANGPDB_IA32_TARGET)

 

 DEBUG_CLANGPDB_IA32_CC_FLAGS         = DEF(CLANGPDB_ALL_CC_FLAGS) -m32 -Oz -flto -march=i586 DEF(CLANGPDB_IA32_TARGET) -gcodeview

-DEBUG_CLANGPDB_IA32_DLINK_FLAGS      = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /SECTION:.xdata,D /SECTION:.pdata,D /MACHINE:X86 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /DEBUG:GHASH  /lldmap

+DEBUG_CLANGPDB_IA32_DLINK_FLAGS      = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /SECTION:.xdata,D /SECTION:.pdata,D /MACHINE:X86 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /DEBUG:GHASH /MLLVM:-exception-model=wineh /lldmap

 DEBUG_CLANGPDB_IA32_DLINK2_FLAGS     =

 

 RELEASE_CLANGPDB_IA32_CC_FLAGS       = DEF(CLANGPDB_ALL_CC_FLAGS) -m32 -Oz -flto -march=i586 DEF(CLANGPDB_IA32_TARGET)

-RELEASE_CLANGPDB_IA32_DLINK_FLAGS    = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /IGNORE:4254 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /SECTION:.xdata,D /SECTION:.pdata,D /MACHINE:X86 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /MERGE:.rdata=.data  /lldmap

+RELEASE_CLANGPDB_IA32_DLINK_FLAGS    = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /IGNORE:4254 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /SECTION:.xdata,D /SECTION:.pdata,D /MACHINE:X86 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /MERGE:.rdata=.data /MLLVM:-exception-model=wineh /lldmap

 RELEASE_CLANGPDB_IA32_DLINK2_FLAGS   =

 

 NOOPT_CLANGPDB_IA32_CC_FLAGS         = DEF(CLANGPDB_ALL_CC_FLAGS) -m32 -O0 -march=i586 DEF(CLANGPDB_IA32_TARGET) -gcodeview

-NOOPT_CLANGPDB_IA32_DLINK_FLAGS      = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /SECTION:.xdata,D /SECTION:.pdata,D /MACHINE:X86 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /DEBUG:GHASH  /lldmap

+NOOPT_CLANGPDB_IA32_DLINK_FLAGS      = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /SECTION:.xdata,D /SECTION:.pdata,D /MACHINE:X86 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /DEBUG:GHASH /MLLVM:-exception-model=wineh /lldmap

 NOOPT_CLANGPDB_IA32_DLINK2_FLAGS     =

 

 ##########################

@@ -2818,17 +2818,17 @@ NOOPT_CLANGPDB_IA32_DLINK2_FLAGS     =
 *_CLANGPDB_X64_VFRPP_FLAGS          = DEF(GCC_VFRPP_FLAGS) DEF(CLANGPDB_X64_TARGET)

 

 DEBUG_CLANGPDB_X64_CC_FLAGS         = DEF(CLANGPDB_ALL_CC_FLAGS) -m64 "-DEFIAPI=__attribute__((ms_abi))" -mno-red-zone -mcmodel=small -Oz -flto DEF(CLANGPDB_X64_TARGET) -gcodeview  -funwind-tables

-DEBUG_CLANGPDB_X64_DLINK_FLAGS      = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /Machine:X64 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /DEBUG:GHASH  /lldmap

+DEBUG_CLANGPDB_X64_DLINK_FLAGS      = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /Machine:X64 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /DEBUG:GHASH /MLLVM:-exception-model=wineh /lldmap

 DEBUG_CLANGPDB_X64_DLINK2_FLAGS     =

 DEBUG_CLANGPDB_X64_GENFW_FLAGS      = --keepexceptiontable

 

 RELEASE_CLANGPDB_X64_CC_FLAGS       = DEF(CLANGPDB_ALL_CC_FLAGS) -m64 "-DEFIAPI=__attribute__((ms_abi))" -mno-red-zone -mcmodel=small -Oz -flto DEF(CLANGPDB_X64_TARGET) -fno-unwind-tables

-RELEASE_CLANGPDB_X64_DLINK_FLAGS    = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /IGNORE:4254 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /SECTION:.xdata,D /SECTION:.pdata,D /Machine:X64 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /MERGE:.rdata=.data  /lldmap

+RELEASE_CLANGPDB_X64_DLINK_FLAGS    = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /IGNORE:4254 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /SECTION:.xdata,D /SECTION:.pdata,D /Machine:X64 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /MERGE:.rdata=.data /MLLVM:-exception-model=wineh /lldmap

 RELEASE_CLANGPDB_X64_DLINK2_FLAGS   =

 RELEASE_CLANGPDB_X64_GENFW_FLAGS    =

 

 NOOPT_CLANGPDB_X64_CC_FLAGS         = DEF(CLANGPDB_ALL_CC_FLAGS) -m64 "-DEFIAPI=__attribute__((ms_abi))" -mno-red-zone -mcmodel=small -O0 DEF(CLANGPDB_X64_TARGET) -gcodeview -funwind-tables

-NOOPT_CLANGPDB_X64_DLINK_FLAGS      = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /Machine:X64 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /DEBUG:GHASH  /lldmap

+NOOPT_CLANGPDB_X64_DLINK_FLAGS      = /NOLOGO /NODEFAULTLIB /IGNORE:4001 /OPT:REF /OPT:ICF=10 /ALIGN:32 /FILEALIGN:32 /Machine:X64 /DLL /ENTRY:$(IMAGE_ENTRY_POINT) /SUBSYSTEM:EFI_BOOT_SERVICE_DRIVER /SAFESEH:NO /BASE:0 /DEBUG:GHASH /MLLVM:-exception-model=wineh /lldmap

 NOOPT_CLANGPDB_X64_DLINK2_FLAGS     =

 NOOPT_CLANGPDB_X64_GENFW_FLAGS      = --keepexceptiontable