From: Ard Biesheuvel Date: Thu, 13 Jul 2017 12:41:12 +0000 (+0100) Subject: BaseTools/tools_def AARCH64: mark register x18 as reserved X-Git-Tag: edk2-stable201903~3803 X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=6d73863b5464f382af2a17b2c2ec1abc550d0af5 BaseTools/tools_def AARCH64: mark register x18 as reserved The AArch64 ABI classifies register x18 as a platform register, which means it should not be used unless the code is guaranteed to run on a platform that doesn't use it in such a capacity. GCC does not honour this requirement by default, and so we need to tell it not to touch it explicitly, by passing the -ffixed-x18 command line option. Link: https://bugzilla.tianocore.org/show_bug.cgi?id=625 Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel Reviewed-by: Leif Lindholm --- diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template index 7d3f542184..128da5131d 100755 --- a/BaseTools/Conf/tools_def.template +++ b/BaseTools/Conf/tools_def.template @@ -4341,7 +4341,7 @@ DEFINE GCC_X64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mno-red-zone -Wno-ad 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) -mlittle-endian -mabi=aapcs -fno-short-enums -funsigned-char -ffunction-sections -fdata-sections -fomit-frame-pointer -Wno-address -mthumb -mfloat-abi=soft -fno-pic -fno-pie DEFINE GCC_ARM_CC_XIPFLAGS = -mno-unaligned-access -DEFINE GCC_AARCH64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mlittle-endian -fno-short-enums -fverbose-asm -funsigned-char -ffunction-sections -fdata-sections -Wno-address -fno-asynchronous-unwind-tables -fno-pic -fno-pie +DEFINE GCC_AARCH64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mlittle-endian -fno-short-enums -fverbose-asm -funsigned-char -ffunction-sections -fdata-sections -Wno-address -fno-asynchronous-unwind-tables -fno-pic -fno-pie -ffixed-x18 DEFINE GCC_AARCH64_CC_XIPFLAGS = -mstrict-align DEFINE GCC_DLINK_FLAGS_COMMON = -nostdlib --pie DEFINE GCC_DLINK2_FLAGS_COMMON = -Wl,--script=$(EDK_TOOLS_PATH)/Scripts/GccBase.lds