usermode capable kernel with logging syscall

2 files changed, 35 insertions, 0 deletions

diff --git a/abi/permission.h b/abi/permission.h
new file mode 100644
index 0000000..5ca56e0
--- /dev/null
+++ b/abi/permission.h
@@ -0,0 +1,6 @@
+#ifndef JOVE_ABI_PERMISSION_H
+#define JOVE_ABI_PERMISSION_H 1
+
+#define PERM_MEMSRV 0
+
+#endif
diff --git a/abi/syscall.h b/abi/syscall.h
new file mode 100644
index 0000000..95cd4a5
--- /dev/null
+++ b/abi/syscall.h
@@ -0,0 +1,29 @@
+#ifndef JOVE_ABI_SYSCALL_H
+#define JOVE_ABI_SYSCALL_H 1
+
+typedef struct syscall {
+    int id;
+} syscall_t;
+
+struct syscall_log {
+    syscall_t syscall;
+    const char *message;
+};
+
+enum
+{
+    SYSCALL_LOG = 0,
+    SYSCALL_COUNT
+};
+
+#define _SYSCALL(data) __asm__ volatile("movq %0, %%rdi\nsyscall":: "r"(data))
+
+void _syscall_log(const char *message) {
+    struct syscall_log syscall_data = {
+        .syscall = (syscall_t){ .id = SYSCALL_LOG },
+        .message = message
+    };
+    _SYSCALL(&syscall_data);
+}
+
+#endif