fix incorrect tss rsp assignment

2 files changed, 34 insertions, 3 deletions

diff --git a/abi/permission.h b/abi/permission.h
index 5ca56e0..10bc6a3 100644
--- a/abi/permission.h
+++ b/abi/permission.h
@@ -1,6 +1,8 @@
 #ifndef JOVE_ABI_PERMISSION_H
 #define JOVE_ABI_PERMISSION_H 1
 
-#define PERM_MEMSRV 0
+#define PERM_MEM_PD 1 /* Permission to write to any PD. */
+#define PERM_MEM_MAP 2 /* Permission to map physical pages. */
+#define PERM_MEM_ALLOC 4 /* Permission to allocate and free physical memory.*/
 
 #endif
diff --git a/abi/syscall.h b/abi/syscall.h
index 95cd4a5..54a67b9 100644
--- a/abi/syscall.h
+++ b/abi/syscall.h
@@ -1,6 +1,8 @@
 #ifndef JOVE_ABI_SYSCALL_H
 #define JOVE_ABI_SYSCALL_H 1
 
+#include <stdint.h>
+
 typedef struct syscall {
     int id;
 } syscall_t;
@@ -10,15 +12,32 @@ struct syscall_log {
     const char *message;
 };
 
+struct syscall_tid {
+    syscall_t syscall;
+    intmax_t value;
+};
+
+struct syscall_mem_map {
+    syscall_t syscall;
+    uintptr_t phys;
+    uintptr_t virt;
+    intmax_t tid;
+};
+
 enum
 {
     SYSCALL_LOG = 0,
+    SYSCALL_TID,
+    SYSCALL_MEM_MAP,
     SYSCALL_COUNT
 };
 
-#define _SYSCALL(data) __asm__ volatile("movq %0, %%rdi\nsyscall":: "r"(data))
+#define _SYSCALL(data) \
+    intmax_t ax; \
+    __asm__ volatile("movq %0, %%rdi\nsyscall": "=a"(ax): "r"(data): "memory"); \
+    return ax
 
-void _syscall_log(const char *message) {
+int _syscall_log(const char *message) {
     struct syscall_log syscall_data = {
         .syscall = (syscall_t){ .id = SYSCALL_LOG },
         .message = message
@@ -26,4 +45,14 @@ void _syscall_log(const char *message) {
     _SYSCALL(&syscall_data);
 }
 
+intmax_t _syscall_tid(void) {
+    syscall_t syscall_data = { SYSCALL_TID };
+    _SYSCALL(&syscall_data);
+}
+
+void __syscall_mem_map(uintptr_t phys, uintptr_t virt, intmax_t tid)
+{
+    
+}
+
 #endif