[kaffe] [PATCH] JIT on arm

[Sascha Hauer]

Hi all,

There is a comment in config/arm/linux/md.c which claims that Kernel 2.6
needs a VM_EXEC flag. Fact is that 2.6 never needed this flag, but since
2.6.9 it no longer ignores it.
I have two patches attached, the first one is the change in between 2.6.8
and 2.6.9 and the second one puts the arm jit back into business for kernels
>2.6.9

Have fun,

 Sascha



diff -purN linux-2.6.8/arch/arm/kernel/traps.c linux-2.6.9/arch/arm/kernel/traps.c
--- linux-2.6.8/arch/arm/kernel/traps.c	2004-08-14 07:36:56.000000000 +0200
+++ linux-2.6.9/arch/arm/kernel/traps.c	2004-10-18 23:53:51.000000000 +0200
@@ -381,7 +381,7 @@ do_cache_op(unsigned long start, unsigne
 {
 	struct vm_area_struct *vma;
 
-	if (end < start)
+	if (end < start || flags)
 		return;
 
 	vma = find_vma(current->active_mm, start);


Index: kaffe-1.1.7/config/arm/linux/md.c
===================================================================
--- kaffe-1.1.7.orig/config/arm/linux/md.c
+++ kaffe-1.1.7/config/arm/linux/md.c
@@ -35,7 +35,7 @@ init_md(void)
 void flush_dcache(void *start, void *end) {
   __asm __volatile ("mov r0, %0\n"
 		    "mov r1, %1\n"
-		    "mov r2, #4\n"		/* this is VM_EXEC from linux/mm.h, needed for Kernel 2.6 */
+		    "mov r2, #0\n"
 		    "swi " __sys1(__ARM_NR_cacheflush) "\n"
 		    : /* no return value */
 		    : "r" ((long)start), "r" ((long)end)


-- 
 Dipl.-Ing. Sascha Hauer | http://www.pengutronix.de
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