m1x/x86_64: frame: Add frame management groundwork

Signed-off-by: Ian Moffett <ian@mirocom.org>

src/m1x/include/arch/x86_64/frameasm.h

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2026, Mirocom Laboratories
+ * Provided under the BSD-3 clause
+ */
+
+#ifndef _MACHINE_FRAMEASM_H_
+#define _MACHINE_FRAMEASM_H_ 1
+
+/*
+ * Push all registers onto the stack to construct
+ * the trapframe
+ */
+#define FRAME_PUSHALL    \
+    pushq %rsi          ;\
+    pushq %rdi          ;\
+    pushq %rcx          ;\
+    pushq %rdx          ;\
+    pushq %rax          ;\
+    pushq %rbp          ;\
+    pushq %rbx          ;\
+    pushq %r15          ;\
+    pushq %r14          ;\
+    pushq %r13          ;\
+    pushq %r12          ;\
+    pushq %r11          ;\
+    pushq %r10          ;\
+    pushq %r9           ;\
+    pushq %r8
+
+/*
+ * Used to restore all registers after an interrupt
+ * has completed
+ */
+#define FRAME_POPALL     \
+    popq %r8             ;\
+    popq %r9             ;\
+    popq %r10            ;\
+    popq %r11            ;\
+    popq %r12            ;\
+    popq %r13            ;\
+    popq %r14            ;\
+    popq %r15            ;\
+    popq %rbx            ;\
+    popq %rbp            ;\
+    popq %rax            ;\
+    popq %rdx            ;\
+    popq %rcx            ;\
+    popq %rdi            ;\
+    popq %rsi
+
+
+/*
+ * Used to push the trapframe if the exception has an
+ * error code.
+ */
+#define FRAME_PREAMBLE_EC ;\
+    testb $3, 16(%rsp)    ;\
+    jnz 1f                ;\
+    jmp 2f                ;\
+1:  lfence                ;\
+    swapgs                ;\
+2:  FRAME_PUSHALL
+
+/*
+ * Used to push the trapframe if the exception has no
+ * error code.
+ */
+#define FRAME_PREAMBLE    ;\
+    testb $3, 8(%rsp)     ;\
+    jnz 1f                ;\
+    jmp 2f                ;\
+1:  lfence                ;\
+    swapgs                ;\
+2:  FRAME_PUSHALL
+
+#endif  /* !_MACHINE_FRAMEASM_H_ */