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6ca8079c85
Fix for pr24346: arm asm label calculation error in sub
Some ARM instructions encode 32-bit immediates as a 8-bit integer
(0-255) and a 4-bit rotation (0-30, even) in its least significant 12
bits. The original fixup, FK_Data_4, patches the instruction by the
value bit-to-bit, regardless of the encoding. For example, assuming
the label L1 and L2 are 0x0 and 0x104 respectively, the following
instruction:
add r0, r0, #(L2 - L1) ; expects 0x104, i.e., 260
would be assembled to the following, which adds 1 to r0, instead of
260:
e2800104 add r0, r0, #4, 2 ; equivalently 1
The new fixup kind fixup_arm_mod_imm takes care of the encoding:
e2800f41 add r0, r0, #260
Patch by Ting-Yuan Huang!
This fixes label calculation for ARM assembly, and is needed to enable
ARM assembly sources for OpenSSL.
Requested by: jkim
MFC after: 3 days
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| .. | ||
| AArch64 | ||
| AMDGPU | ||
| ARM | ||
| AVR | ||
| BPF | ||
| CppBackend | ||
| Hexagon | ||
| Mips | ||
| MSP430 | ||
| NVPTX | ||
| PowerPC | ||
| Sparc | ||
| SystemZ | ||
| WebAssembly | ||
| X86 | ||
| XCore | ||
| Target.cpp | ||
| TargetIntrinsicInfo.cpp | ||
| TargetLoweringObjectFile.cpp | ||
| TargetMachine.cpp | ||
| TargetMachineC.cpp | ||
| TargetRecip.cpp | ||
| TargetSubtargetInfo.cpp | ||