[mono] Remove unused x86/arm mach-support code (#101339)

We no longer support Apple x86 or 32bit ARM targets so we can remove that code.

Author: akoeplinger

src/mono/mono/utils/CMakeLists.txt

@@ -187,15 +187,9 @@ set(utils_arch_sources mach-support-unknown.c)
 elseif(HOST_AMD64)
 set(utils_arch_sources
     mach-support-amd64.c)
-elseif(HOST_X86)
-set(utils_arch_sources
-    mach-support-x86.c)
 elseif(HOST_ARM64)
 set(utils_arch_sources
     mach-support-arm64.c)
-elseif(HOST_ARM)
-set(utils_arch_sources
-    mach-support-arm.c)
 else()
 #message(FATAL_ERROR "")
 endif()

src/mono/mono/utils/mach-support-arm.c

@@ -20,11 +20,6 @@
 #include "utils/mono-compiler.h"
 #include "mach-support.h"
 
-/* _mcontext.h now defines __darwin_mcontext32, not __darwin_mcontext, starting with Xcode 5.1 */
-#ifdef _STRUCT_MCONTEXT32
-       #define __darwin_mcontext       __darwin_mcontext32
-#endif
-
 int
 mono_mach_arch_get_mcontext_size (void)
 {

src/mono/mono/utils/mach-support-arm64.c

@@ -18,11 +18,6 @@
 #include <mach/thread_status.h>
 
 #define MONO_MACH_ARCH_SUPPORTED 1
-#if defined(__arm__)
-typedef _STRUCT_MCONTEXT *mcontext_t;
-#elif defined(__aarch64__)
-typedef _STRUCT_MCONTEXT64 *mcontext_t;
-#endif
 
 int mono_mach_arch_get_mcontext_size (void);
 void mono_mach_arch_thread_states_to_mcontext (thread_state_t state, thread_state_t fpstate, void *context);