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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-10-28 12:36:19 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-10-28 16:26:15 +0100 |
| commit | 4101c8753f4dfcb489afcba6d7dd20216545c417 (patch) | |
| tree | 299065c94e3535f522d527987acdb45ee905531c /ArmPkg/Include | |
| parent | c44f9a42d4a564cb04372389276cd48c05ad9914 (diff) | |
| download | edk2-4101c8753f4dfcb489afcba6d7dd20216545c417.tar.gz edk2-4101c8753f4dfcb489afcba6d7dd20216545c417.tar.bz2 edk2-4101c8753f4dfcb489afcba6d7dd20216545c417.zip | |
ArmPkg RVCT: add ADRL/LDRL macro equivalents
The GCC ARM builds have access to ADRL/LDRL macros that emit relative
symbol references, i.e., references that do not require fixing up at
load time (or FV generation time for XIP modules)
Implement equivalent functionality for RVCT: note that this does not
use movw/movt pairs, but the more compatible add/add/add or add/add/ldr
sequences (which Clang does not support, unfortunately, hence the use
of movw/movt for the GCC toolchain family)
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 'ArmPkg/Include')
| -rw-r--r-- | ArmPkg/Include/AsmMacroIoLib.inc | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/ArmPkg/Include/AsmMacroIoLib.inc b/ArmPkg/Include/AsmMacroIoLib.inc index c9cad5230c..4bc3146fb3 100644 --- a/ArmPkg/Include/AsmMacroIoLib.inc +++ b/ArmPkg/Include/AsmMacroIoLib.inc @@ -26,4 +26,24 @@ ldr $Reg, =($Data)
MEND
+ MACRO
+ adrll $Reg, $Symbol
+ add $Reg, pc, #-8
+ RELOC R_ARM_ALU_PC_G0_NC, $Symbol
+ add $Reg, $Reg, #-4
+ RELOC R_ARM_ALU_PC_G1_NC, $Symbol
+ add $Reg, $Reg, #0
+ RELOC R_ARM_ALU_PC_G2, $Symbol
+ MEND
+
+ MACRO
+ ldrl $Reg, $Symbol
+ add $Reg, pc, #-8
+ RELOC R_ARM_ALU_PC_G0_NC, $Symbol
+ add $Reg, $Reg, #-4
+ RELOC R_ARM_ALU_PC_G1_NC, $Symbol
+ ldr $Reg, [$Reg, #0]
+ RELOC R_ARM_LDR_PC_G2, $Symbol
+ MEND
+
END
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