Changes in kernel/arch/ia32/src/asm.S [91ef7cfd:d029434] in mainline

File:

• kernel/arch/ia32/src/asm.S (modified) (4 diffs)

kernel/arch/ia32/src/asm.S

@@ -175 +175 @@
 
 /*
+ * Size of the entire istate structure including the error word and the
+ * hardware-saved part.
+ */
+#define ISTATE_REAL_SIZE  (ISTATE_SOFT_SIZE + 24)
+
+/*
  * The SYSENTER syscall mechanism can be used for syscalls with
  * four or fewer arguments. To pass these four arguments, we
@@ -185 +191 @@
 .global sysenter_handler
 sysenter_handler:
-
-        /*
-         * Note that the space needed for the istate structure has been
-         * preallocated on the stack by before_thread_runs_arch().
-         */
+        subl $(ISTATE_REAL_SIZE), %esp
 
         /*
@@ -258 +260 @@
         movl ISTATE_OFFSET_ESP(%esp), %ecx
 
+        addl $(ISTATE_REAL_SIZE), %esp
+        
         sysexit   /* return to userspace */
 
@@ -349 +353 @@
 #define ERROR_WORD_INTERRUPT_LIST  0x00027d00
 
+/** Declare interrupt handlers
+ *
+ * Declare interrupt handlers for n interrupt
+ * vectors starting at vector i.
+ *
+ */
 .macro handler i
 .global int_\i