asm: make use regular asserts that will just work on baremetal

Previously had wonky line pointer in asm_main. New interface simpler and more portable.

Add tests for ASSERT_EQ_ and family in arm and aarch64, previously on x86_64.

ASSERT_EQ_ and family in ARM can now either take =123, =addr or var, before this
the = was added on macros so var was not possible.

Define the main function directly in assembly, the C driver was useless.

lkmc/x86_64.h

@@ -0,0 +1,62 @@
+#ifndef LKMC_X86_64_H
+#define LKMC_X86_64_H
+
+/* This and other macros may make C function calls, and therefore can destroy
+ * non-callee saved registers. */
+#define LKMC_ASSERT_EQ(general1, general2) \
+    mov general2, %rdi; \
+    push %rdi; \
+    mov general1, %rdi; \
+    pop %rsi; \
+    mov $__LINE__, %edx; \
+    call lkmc_assert_eq_64; \
+;
+
+#define LKMC_ASSERT_FAIL \
+    mov $__LINE__, %edi; \
+    call lkmc_assert_fail; \
+;
+
+/* Assert that two memory arrays are the same. */
+#define LKMC_ASSERT_MEMCMP(label1, label2, const_size) \
+    lea label1(%rip), %rdi; \
+    lea label2(%rip), %rsi; \
+    mov const_size, %rdx; \
+    mov $__LINE__, %ecx; \
+    call lkmc_assert_memcmp; \
+;
+
+/* Function epilogue.
+ *
+ * https://github.com/cirosantilli/linux-kernel-module-cheat#x86_64-calling-convention
+ */
+#define LKMC_EPILOGUE \
+    pop %rbx; \
+    pop %r12; \
+    pop %r13; \
+    pop %r14; \
+    pop %r15; \
+    pop %rbp; \
+    mov $0, %rax; \
+    ret; \
+;
+
+/* Function prologue.
+ *
+ * https://github.com/cirosantilli/linux-kernel-module-cheat#x86_64-calling-convention
+ */
+#define LKMC_PROLOGUE \
+.text; \
+.global main; \
+main: \
+    push %rbp; \
+    mov %rsp, %rbp; \
+    push %r15; \
+    push %r14; \
+    push %r13; \
+    push %r12; \
+    push %rbx; \
+main_after_prologue: \
+;
+
+#endif