Fix RhpCallCatchFunclet .text relocation on amd64. (#111227)

c8e4f2c
changed asm implementation in RhpThrowHwEx on amd64 from a relative
jump, using jmp RhpThrowHwEx to a mov rax, RhpThrowHwEx that is later
jumped to using jmp rax.

This introduce a ADDR64 relocation record in the generated object file:

000004EC  ADDR64            00000000 00000000        2A  RhpThrowHwEx

That will then be left as a relocation that needs to be fixed up
by the loader:

73000 RVA,        C SizeOfBlock
     F7C  DIR64      0000000140073A90  RhpThrowHwEx
       0  ABS

Where the RVA 73000 is part of the .text section that is read, execute
section.

Having relocations done to the .text section is however not supported on
all Windows platform configurations leading to loader errors
blocking use of nativeaot on these configurations.

This commit change the mov to a lea instruction using relative offset
to calculate address of RhpThrowHwEx. That will end up with a REL32
relocation record in the generated object file:

000004ED  REL32                      00000000        2A  RhpThrowHwEx

Since this uses relative addressing it won't leave any
relocation in the final image making sure the generated nativeaot image
can be successfully loaded on Windows platforms with configurations
preventing relocation in .text section.

Author: lateralusX

src/coreclr/nativeaot/Runtime/amd64/ExceptionHandling.asm

@@ -532,7 +532,7 @@ endif
         ;; It was the ThreadAbortException, so rethrow it
         mov     rcx, STATUS_REDHAWK_THREAD_ABORT
         mov     rdx, rax                                            ;; rdx <- continuation address as exception RIP
-        mov     rax, RhpThrowHwEx                                   ;; Throw the ThreadAbortException as a special kind of hardware exception
+        lea     rax, [RhpThrowHwEx]                                 ;; Throw the ThreadAbortException as a special kind of hardware exception
 
         ;; reset RSP and jump to RAX
    @@:  mov     rsp, r8                                             ;; reset the SP to resume SP value