68000: for 32bit platforms we need a codebase field

diff --git a/Kernel/include/kernel.h b/Kernel/include/kernel.h
index 76c2632..cb3c64c 100644 (file)
--- a/Kernel/include/kernel.h
+++ b/Kernel/include/kernel.h
@@ -402,6 +402,11 @@ typedef struct p_tab {
 #endif
 } p_tab, *ptptr;
 
+/*
+ *     We copy the u_data block between processes when we fork and on some
+ *     platforms it moves. This means that there must be *no* internal pointer
+ *     references to the udata within u_data itself.
+ */
 typedef struct u_data {
     /**** If you change this top section, also update offsets in "kernel.def" ****/
     struct p_tab *u_ptab;       /* Process table pointer */
@@ -422,6 +427,9 @@ typedef struct u_data {
     void *      u_isp;          /* Value of initial sp (argv) */
     usize_t    u_top;          /* Top of memory for this task */
     uaddr_t    u_break;        /* Top of data space */
+#ifdef CONFIG_32BIT
+    uaddr_t    u_codebase;     /* 32bit platform base pointers */
+#endif
     int     (*u_sigvec[NSIGS])(int);   /* Array of signal vectors */
     /**** If you change this top section, also update offsets in "kernel.def" ****/
 

diff --git a/Kernel/kernel-68000.def b/Kernel/kernel-68000.def
index f3c00c1..b22e4e2 100644 (file)
--- a/Kernel/kernel-68000.def
+++ b/Kernel/kernel-68000.def
@@ -16,7 +16,8 @@
 #define U_DATA__U_ARGN2                34
 #define U_DATA__U_ARGN3                38
 #define U_DATA__U_ISP          42
-#define U_DATA__U_SIGVEC       46
+#define U_DATA__U_CODEBASE     46
+#define U_DATA__U_SIGVEC       50
 
 #define P_TAB__P_STATUS_OFFSET 0
 #define P_TAB__P_TTY_OFFSET    1