Kernel+Userland: Remove uses of the __i386__ compiler macro

Kernel/Arch/mcontext.h

@@ -6,7 +6,7 @@
 
 #pragma once
 
-#if defined(__i386__) || defined(__x86_64__)
+#if defined(__x86_64__)
 #    include <Kernel/Arch/x86_64/mcontext.h>
 #elif defined(__aarch64__)
 #    include <Kernel/Arch/aarch64/mcontext.h>

Kernel/Arch/x86_64/mcontext.h

@@ -13,18 +13,6 @@ extern "C" {
 #endif
 
 struct __attribute__((packed)) __mcontext {
-#ifdef __i386__
-    uint32_t eax;
-    uint32_t ecx;
-    uint32_t edx;
-    uint32_t ebx;
-    uint32_t esp;
-    uint32_t ebp;
-    uint32_t esi;
-    uint32_t edi;
-    uint32_t eip;
-    uint32_t eflags;
-#else
     uint64_t rax;
     uint64_t rcx;
     uint64_t rdx;
@@ -43,7 +31,6 @@ struct __attribute__((packed)) __mcontext {
     uint64_t r14;
     uint64_t r15;
     uint64_t rflags;
-#endif
     uint32_t cs;
     uint32_t ss;
     uint32_t ds;

Userland/Libraries/LibC/elf.h

@@ -39,11 +39,7 @@
 #    include <AK/Types.h>
 #endif
 
-#ifdef __i386__
-#    define ElfW(type) Elf32_##type
-#else
-#    define ElfW(type) Elf64_##type
-#endif
+#define ElfW(type) Elf64_##type
 
 typedef uint8_t Elf_Byte;
 

Userland/Libraries/LibC/inttypes.h

@@ -12,13 +12,8 @@
 
 __BEGIN_DECLS
 
-#ifdef __i386__
-#    define __PRI64_PREFIX "ll"
-#    define __PRIPTR_PREFIX
-#else
-#    define __PRI64_PREFIX "l"
-#    define __PRIPTR_PREFIX "l"
-#endif
+#define __PRI64_PREFIX "l"
+#define __PRIPTR_PREFIX "l"
 
 #define PRId8 "d"
 #define PRId16 "d"

Userland/Libraries/LibC/setjmp.h

@@ -19,14 +19,7 @@ __BEGIN_DECLS
 //
 
 struct __jmp_buf {
-#ifdef __i386__
-    uint32_t ebx;
-    uint32_t esi;
-    uint32_t edi;
-    uint32_t ebp;
-    uint32_t esp;
-    uint32_t eip;
-#elif defined(__x86_64__)
+#if defined(__x86_64__)
     uint64_t rbx;
     uint64_t r12;
     uint64_t r13;
@@ -52,9 +45,7 @@ typedef struct __jmp_buf sigjmp_buf[1];
  * Since setjmp.h may be included by ports written in C, we need to guard this.
  */
 #ifdef __cplusplus
-#    ifdef __i386__
-static_assert(sizeof(struct __jmp_buf) == 32, "struct __jmp_buf unsynchronized with i386/setjmp.S");
-#    elif defined(__x86_64__)
+#    if defined(__x86_64__)
 static_assert(sizeof(struct __jmp_buf) == 72, "struct __jmp_buf unsynchronized with x86_64/setjmp.S");
 #    elif defined(__aarch64__)
 static_assert(sizeof(struct __jmp_buf) == 184, "struct __jmp_buf unsynchronized with aarch64/setjmp.S");