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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-07-13 13:41:12 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-07-14 17:28:49 +0100 |
| commit | 6d73863b5464f382af2a17b2c2ec1abc550d0af5 (patch) | |
| tree | 7d6b8d490645a0d2c874648df8d4399e849b0963 /BaseTools | |
| parent | b926f2f2a4cd404df1d2c1dddbcd1178acc63b5e (diff) | |
| download | edk2-6d73863b5464f382af2a17b2c2ec1abc550d0af5.tar.gz edk2-6d73863b5464f382af2a17b2c2ec1abc550d0af5.tar.bz2 edk2-6d73863b5464f382af2a17b2c2ec1abc550d0af5.zip | |
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 <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Diffstat (limited to 'BaseTools')
| -rwxr-xr-x | BaseTools/Conf/tools_def.template | 2 |
1 files changed, 1 insertions, 1 deletions
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
|