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]> --- 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 5e710dce3e86..aa2b6b1488c4 100644 --- a/BaseTools/Conf/tools_def.template +++ b/BaseTools/Conf/tools_def.template @@ -3812,7 +3812,7 @@ DEFINE GCC_IA32_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -m32 -malign-double - 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 -- 1.9.1 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
