Revision: 18242
http://sourceforge.net/p/edk2/code/18242
Author: abiesheuvel
Date: 2015-08-20 06:39:12 +0000 (Thu, 20 Aug 2015)
Log Message:
-----------
BaseTools AARCH64: use tiny code model by default
The AARCH64 tiny code model produces more efficient code, since it
uses relative symbol references rather than absolute references, i.e.,
an emitted relative reference refers to the symbol directly rather
than a literal containing its 64-bit absolute address. This saves
space in the binary, and reduces the number of relocation fixups that
need to be applied by the PE/COFF loader.
So now that we support relative relocations in GenFw, move to the
tiny code model by default. Note that the large model can still be
selected by individual modules by adding -mcmodel=large to the
appropriate CC_FLAGS.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <[email protected]>
Reviewed-by: Laszlo Ersek <[email protected]>
Reviewed-by: Leif Lindholm <[email protected]>
Tested-by: Leif Lindholm <[email protected]>
Modified Paths:
--------------
trunk/edk2/BaseTools/Conf/tools_def.template
Modified: trunk/edk2/BaseTools/Conf/tools_def.template
===================================================================
--- trunk/edk2/BaseTools/Conf/tools_def.template 2015-08-20 06:39:04 UTC
(rev 18241)
+++ trunk/edk2/BaseTools/Conf/tools_def.template 2015-08-20 06:39:12 UTC
(rev 18242)
@@ -3812,7 +3812,7 @@
DEFINE GCC_X64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mno-red-zone
-Wno-address -mno-stack-arg-probe
DEFINE GCC_IPF_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS)
-minline-int-divide-min-latency
DEFINE GCC_ARM_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mword-relocations
-mlittle-endian -mabi=aapcs -mapcs -fno-short-enums -save-temps -fsigned-char
-ffunction-sections -fdata-sections -fomit-frame-pointer -Wno-address -mthumb
-mfloat-abi=soft
-DEFINE GCC_AARCH64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mcmodel=large
-mlittle-endian -fno-short-enums -save-temps -fverbose-asm -fsigned-char
-ffunction-sections -fdata-sections -fomit-frame-pointer -fno-builtin
-Wno-address -fno-asynchronous-unwind-tables
+DEFINE GCC_AARCH64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mcmodel=tiny
-mlittle-endian -fno-short-enums -save-temps -fverbose-asm -fsigned-char
-ffunction-sections -fdata-sections -fomit-frame-pointer -fno-builtin
-Wno-address -fno-asynchronous-unwind-tables
DEFINE GCC_DLINK_FLAGS_COMMON = -nostdlib --pie
DEFINE GCC_DLINK2_FLAGS_COMMON =
--script=$(EDK_TOOLS_PATH)/Scripts/GccBase.lds
DEFINE GCC_IA32_X64_DLINK_COMMON = DEF(GCC_DLINK_FLAGS_COMMON) --gc-sections
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