Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: md.c 7259 2007-01-30 13:58:35Z twisti $
-
*/
#include "vm/jit/asmpart.h"
#include "vm/jit/md.h"
+#include "vm/jit/codegen-common.h" /* REMOVE ME: for codegendata */
+
/* md_init *********************************************************************
}
-/* 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
{
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;
}
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;