* Removed all Id tags.

[cacao.git] / src / vm / jit / arm / md.c

diff --git a/src/vm/jit/arm/md.c b/src/vm/jit/arm/md.c
index 61d33173929bff6a4263fe4abda2e531cd1b8688..5d89dd8a6d85ba3d63b036422fb13cc1824a7d16 100644 (file)
--- a/src/vm/jit/arm/md.c
+++ b/src/vm/jit/arm/md.c
@@ -22,8 +22,6 @@
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
    02110-1301, USA.
 
-   $Id: md.c 7504 2007-03-12 13:17:07Z twisti $
-
 */
 
 
@@ -56,34 +54,6 @@ void md_init(void)
 }
 
 
-/* md_codegen_patch_branch *****************************************************
-
-   Back-patches a branch instruction.
-
-*******************************************************************************/
-
-void md_codegen_patch_branch(codegendata *cd, s4 branchmpc, s4 targetmpc)
-{
-       s4 *mcodeptr;
-       s4  disp;                           /* branch displacement                */
-
-       /* calculate the patch position */
-
-       mcodeptr = (s4 *) (cd->mcodebase + branchmpc);
-
-       /* Calculate the branch displacement. */
-
-       disp = (targetmpc - branchmpc - 4) >> 2;
-
-       if ((disp < (s4) 0xff000000) || (disp > (s4) 0x00ffffff))
-               vm_abort("md_codegen_patch_branch: branch displacement out of range: %d > +/-%d", disp, 0x00ffffff);
-
-       /* patch the branch instruction before the mcodeptr */
-
-       mcodeptr[-1] |= (disp & 0x00ffffff);
-}
-
-
 /* md_stacktrace_get_returnaddress *********************************************
 
    Returns the return address of the current stackframe, specified by
@@ -95,14 +65,12 @@ u1 *md_stacktrace_get_returnaddress(u1 *sp, u4 framesize)
 {
        u1 *ra;
 
-       /*printf("md_stacktrace_get_returnaddress(): called (sp=%x, framesize=%d)\n", sp, framesize);*/
+       /* On ARM the return address is located on the top of the
+          stackframe. */
+       /* ATTENTION: This is only true for non-leaf methods!!! */
 
-       /* on ARM the return address is located on the top of the stackframe */
-       /* ATTENTION: this is only true for non-leaf methods !!! */
        ra = *((u1 **) (sp + framesize - SIZEOF_VOID_P));
 
-       /*printf("md_stacktrace_get_returnaddress(): result (ra=%x)\n", ra);*/
-
        return ra;
 }
 
@@ -158,6 +126,11 @@ u1 *md_get_method_patch_address(u1 *ra, stackframeinfo *sfi, u1 *mptr)
 
                assert((mcode & 0x00800000) == 0x00800000);
 
+               /* return NULL if no mptr was specified (used for replacement) */
+
+               if (mptr == NULL)
+                       return NULL;
+
                /* we loaded from REG_METHODPTR */
 
                pa = mptr + offset;