/* src/vm/jit/powerpc/patcher.c - PowerPC code patching functions
- Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
- C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
- E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
- J. Wenninger, Institut f. Computersprachen - TU Wien
+ Copyright (C) 1996-2005, 2006, 2007, 2008
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
+ Copyright (C) 2008 Theobroma Systems Ltd.
This file is part of CACAO.
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: patcher.c 7431 2007-03-01 13:49:14Z edwin $
-
*/
#include "config.h"
#include <assert.h>
+#include <stdint.h>
#include "vm/types.h"
+#include "vm/jit/powerpc/md.h"
+
#include "mm/memory.h"
-#include "native/native.h"
-#include "vm/builtin.h"
-#include "vm/exceptions.h"
-#include "vm/initialize.h"
+#include "native/native.hpp"
+
+#include "vm/jit/builtin.hpp"
+#include "vm/class.hpp"
+#include "vm/field.hpp"
+#include "vm/initialize.hpp"
+#include "vm/options.h"
+#include "vm/references.h"
+#include "vm/resolve.hpp"
#include "vm/jit/asmpart.h"
-#include "vm/jit/patcher.h"
-#include "vm/jit/md.h"
#include "vm/jit/methodheader.h"
-#include "vm/jit/stacktrace.h"
-
-#include "vmcore/class.h"
-#include "vmcore/field.h"
-#include "vmcore/options.h"
-#include "vmcore/resolve.h"
-#include "vmcore/references.h"
-
+#include "vm/jit/patcher-common.hpp"
-/* patcher_wrapper *************************************************************
- Wrapper for all patchers. It also creates the stackframe info
- structure.
+/* patcher_patch_code **********************************************************
- If the return value of the patcher function is false, it gets the
- exception object, clears the exception pointer and returns the
- exception.
+ Just patches back the original machine code.
*******************************************************************************/
-java_objectheader *patcher_wrapper(u1 *sp, u1 *pv, u1 *ra)
+void patcher_patch_code(patchref_t *pr)
{
- stackframeinfo sfi;
- u1 *xpc;
- java_objectheader *o;
- u4 mcode;
- functionptr f;
- bool result;
- java_objectheader *e;
-
- /* define the patcher function */
-
- bool (*patcher_function)(u1 *);
-
- assert(pv != NULL);
-
- /* get stuff from the stack */
-
- xpc = (u1 *) *((ptrint *) (sp + 5 * 4));
- o = (java_objectheader *) *((ptrint *) (sp + 4 * 4));
- f = (functionptr) *((ptrint *) (sp + 0 * 4));
-
- /* Correct RA is calculated in codegen.c and stored in the patcher
- stub stack. There's no need to adjust xpc. */
-
- /* store PV into the patcher function position */
-
- *((ptrint *) (sp + 0 * 4)) = (ptrint) pv;
-
- /* cast the passed function to a patcher function */
-
- patcher_function = (bool (*)(u1 *)) (ptrint) f;
-
- /* enter a monitor on the patching position */
-
- PATCHER_MONITORENTER;
-
- /* create the stackframeinfo */
-
- stacktrace_create_extern_stackframeinfo(&sfi, pv, sp + 8 * 4, ra, xpc);
-
- /* call the proper patcher function */
-
- result = (patcher_function)(sp);
-
- /* remove the stackframeinfo */
-
- stacktrace_remove_stackframeinfo(&sfi);
-
- /* check for return value and exit accordingly */
-
- if (result == false) {
- e = exceptions_get_and_clear_exception();
-
- PATCHER_MONITOREXIT;
-
- return e;
- }
-
- /* patch back original code */
-
- mcode = *((u4 *) (sp + 3 * 4));
-
- *((u4 *) xpc) = mcode;
-
- /* synchronize instruction cache */
-
- md_icacheflush(xpc, 4);
-
- PATCHER_MARK_PATCHED_MONITOREXIT;
+ // Patch back original code.
+ *((uint32_t*) pr->mpc) = pr->mcode;
- return NULL;
+ // Synchronize instruction cache.
+ md_icacheflush((void*) pr->mpc, 1 * 4);
}
-/* patcher_initialize_class ****************************************************
-
- Initalizes a given classinfo pointer. This function does not patch
- any data.
-
-*******************************************************************************/
-
-bool patcher_initialize_class(u1 *sp)
-{
- classinfo *c;
-
- /* get stuff from the stack */
-
- c = (classinfo *) *((ptrint *) (sp + 2 * 4));
-
- /* check if the class is initialized */
-
- if (!(c->state & CLASS_INITIALIZED))
- if (!initialize_class(c))
- return false;
-
- return true;
-}
-
-
-/* patcher_resolve_class *******************************************************
-
- Resolves a given unresolved_class pointer. This function does not
- patch any data.
-
-*******************************************************************************/
-
-#ifdef ENABLE_VERIFIER
-bool patcher_resolve_class(u1 *sp)
+/**
+ * Check if the trap instruction at the given PC is valid.
+ *
+ * @param pc Program counter.
+ *
+ * @return true if valid, false otherwise.
+ */
+bool patcher_is_valid_trap_instruction_at(void* pc)
{
- unresolved_class *uc;
-
- /* get stuff from the stack */
-
- uc = (unresolved_class *) *((ptrint *) (sp + 2 * 4));
-
- /* resolve the class and check subtype constraints */
-
- if (!resolve_class_eager_no_access_check(uc))
- return false;
+ uint32_t mcode = *((uint32_t*) pc);
- return true;
+ // Check for the undefined instruction we use.
+ return (mcode == 0x00000000);
}
-#endif /* ENABLE_VERIFIER */
/* patcher_resolve_classref_to_classinfo ***************************************
*******************************************************************************/
-bool patcher_resolve_classref_to_classinfo(u1 *sp)
+bool patcher_resolve_classref_to_classinfo(patchref_t *pr)
{
- constant_classref *cr;
- s4 disp;
- u1 *pv;
- classinfo *c;
-
- /* get stuff from the stack */
+ constant_classref * cr = (constant_classref*) pr->ref;
+ uintptr_t* datap = (uintptr_t*) pr->datap;
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 4));
- disp = *((s4 *) (sp + 1 * 4));
- pv = (u1 *) *((ptrint *) (sp + 0 * 4));
+ // Resolve the class.
+ classinfo* c = resolve_classref_eager(cr);
- /* get the classinfo */
-
- if (!(c = resolve_classref_eager(cr)))
+ if (c == NULL)
return false;
- /* patch the classinfo pointer */
-
- *((ptrint *) (pv + disp)) = (ptrint) c;
+ // Patch the class pointer.
+ *datap = (uintptr_t) c;
- /* synchronize data cache */
+ // Synchronize data cache.
+ md_dcacheflush(datap, SIZEOF_VOID_P);
- md_dcacheflush(pv + disp, SIZEOF_VOID_P);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
*******************************************************************************/
-bool patcher_resolve_classref_to_vftbl(u1 *sp)
+bool patcher_resolve_classref_to_vftbl(patchref_t *pr)
{
- constant_classref *cr;
- s4 disp;
- u1 *pv;
- classinfo *c;
+ constant_classref* cr = (constant_classref*) pr->ref;
+ uintptr_t* datap = (uintptr_t*) pr->datap;
- /* get stuff from the stack */
+ // Resolve the class.
+ classinfo* c = resolve_classref_eager(cr);
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 4));
- disp = *((s4 *) (sp + 1 * 4));
- pv = (u1 *) *((ptrint *) (sp + 0 * 4));
-
- /* get the fieldinfo */
-
- if (!(c = resolve_classref_eager(cr)))
+ if (c == NULL)
return false;
- /* patch super class' vftbl */
+ // Patch super class' vftbl.
+ *datap = (uintptr_t) c->vftbl;
- *((ptrint *) (pv + disp)) = (ptrint) c->vftbl;
+ // Synchronize data cache.
+ md_dcacheflush(datap, SIZEOF_VOID_P);
- /* synchronize data cache */
-
- md_dcacheflush(pv + disp, SIZEOF_VOID_P);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
*******************************************************************************/
-bool patcher_resolve_classref_to_flags(u1 *sp)
-{
- constant_classref *cr;
- s4 disp;
- u1 *pv;
- classinfo *c;
-
- /* get stuff from the stack */
-
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 4));
- disp = *((s4 *) (sp + 1 * 4));
- pv = (u1 *) *((ptrint *) (sp + 0 * 4));
-
- /* get the fieldinfo */
-
- if (!(c = resolve_classref_eager(cr)))
- return false;
-
- /* patch class flags */
-
- *((s4 *) (pv + disp)) = (s4) c->flags;
-
- /* synchronize data cache */
-
- md_dcacheflush(pv + disp, SIZEOF_VOID_P);
-
- return true;
-}
-
-
-/* patcher_resolve_native_function *********************************************
-
- XXX
-
-*******************************************************************************/
-
-#if !defined(WITH_STATIC_CLASSPATH)
-bool patcher_resolve_native_function(u1 *sp)
+bool patcher_resolve_classref_to_flags(patchref_t *pr)
{
- methodinfo *m;
- s4 disp;
- u1 *pv;
- functionptr f;
-
- /* get stuff from the stack */
-
- m = (methodinfo *) *((ptrint *) (sp + 2 * 4));
- disp = *((s4 *) (sp + 1 * 4));
- pv = (u1 *) *((ptrint *) (sp + 0 * 4));
+ constant_classref* cr = (constant_classref*) pr->ref;
+ int32_t* datap = (int32_t*) pr->datap;
- /* resolve native function */
+ // Resolve the class.
+ classinfo* c = resolve_classref_eager(cr);
- if (!(f = native_resolve_function(m)))
+ if (c == NULL)
return false;
- /* patch native function pointer */
+ // Patch class flags.
+ *datap = c->flags;
- *((ptrint *) (pv + disp)) = (ptrint) f;
+ // Synchronize data cache.
+ md_dcacheflush(datap, SIZEOF_VOID_P);
- /* synchronize data cache */
-
- md_dcacheflush(pv + disp, SIZEOF_VOID_P);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
-#endif /* !defined(WITH_STATIC_CLASSPATH) */
/* patcher_get_putstatic *******************************************************
*******************************************************************************/
-bool patcher_get_putstatic(u1 *sp)
+bool patcher_get_putstatic(patchref_t *pr)
{
- u1 *ra;
- u4 mcode;
- unresolved_field *uf;
- s4 disp;
- u1 *pv;
- fieldinfo *fi;
-
- /* get stuff from the stack */
+ unresolved_field* uf = (unresolved_field*) pr->ref;
+ uintptr_t* datap = (uintptr_t*) pr->datap;
- ra = (u1 *) *((ptrint *) (sp + 5 * 4));
- mcode = *((u4 *) (sp + 3 * 4));
- uf = (unresolved_field *) *((ptrint *) (sp + 2 * 4));
- disp = *((s4 *) (sp + 1 * 4));
- pv = (u1 *) *((ptrint *) (sp + 0 * 4));
+ // Resolve the field.
+ fieldinfo* fi = resolve_field_eager(uf);
- /* get the fieldinfo */
-
- if (!(fi = resolve_field_eager(uf)))
+ if (fi == NULL)
return false;
- /* check if the field's class is initialized */
-
- if (!(fi->class->state & CLASS_INITIALIZED))
- if (!initialize_class(fi->class))
+ // Check if the field's class is initialized.
+ if (!(fi->clazz->state & CLASS_INITIALIZED))
+ if (!initialize_class(fi->clazz))
return false;
- /* patch the field value's address */
+ // Patch the field value's address.
+ *datap = (uintptr_t) fi->value;
- *((ptrint *) (pv + disp)) = (ptrint) &(fi->value);
+ // Synchronize data cache.
+ md_dcacheflush(datap, SIZEOF_VOID_P);
- /* synchronize data cache */
-
- md_dcacheflush(pv + disp, SIZEOF_VOID_P);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
*******************************************************************************/
-bool patcher_get_putfield(u1 *sp)
+bool patcher_get_putfield(patchref_t *pr)
{
- u1 *ra;
- unresolved_field *uf;
- u1 *pv;
- fieldinfo *fi;
- s2 disp;
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 4));
- uf = (unresolved_field *) *((ptrint *) (sp + 2 * 4));
- pv = (u1 *) *((ptrint *) (sp + 1 * 4));
+ uint32_t* pc = (uint32_t*) pr->mpc;
+ unresolved_field* uf = (unresolved_field*) pr->ref;
- /* get the fieldinfo */
+ // Resolve the field.
+ fieldinfo* fi = resolve_field_eager(uf);
- if (!(fi = resolve_field_eager(uf)))
+ if (fi == NULL)
return false;
- /* if we show NOPs, we have to skip them */
+ // Patch the field's offset.
+ if (IS_LNG_TYPE(fi->type)) {
+ /* If the field has type long, we have to patch two
+ instructions. But we have to check which instruction
+ is first. We do that with the offset of the first
+ instruction. */
- if (opt_shownops) {
- /* patch the field's offset */
+ uint32_t disp = (pr->mcode & 0x0000ffff);
- if (IS_LNG_TYPE(fi->type)) {
- /* If the field has type long, we have to patch two
- instructions. But we have to check which instruction
- is first. We do that with the offset of the first
- instruction. */
-
- disp = *((u4 *) (ra + 1 * 4));
-
- if (disp == 4) {
- *((u4 *) (ra + 1 * 4)) |= (s2) ((fi->offset + 4) & 0x0000ffff);
- *((u4 *) (ra + 2 * 4)) |= (s2) ((fi->offset + 0) & 0x0000ffff);
- }
- else {
- *((u4 *) (ra + 1 * 4)) |= (s2) ((fi->offset + 0) & 0x0000ffff);
- *((u4 *) (ra + 2 * 4)) |= (s2) ((fi->offset + 4) & 0x0000ffff);
- }
+ if (disp == 4) {
+ pr->mcode &= 0xffff0000;
+ pr->mcode |= ((fi->offset + 4) & 0x0000ffff);
+ pc[1] |= ((fi->offset + 0) & 0x0000ffff);
}
- else
- *((u4 *) (ra + 1 * 4)) |= (s2) (fi->offset & 0x0000ffff);
+ else {
+ pr->mcode |= ((fi->offset + 0) & 0x0000ffff);
+ pc[1] &= 0xffff0000;
+ pc[1] |= ((fi->offset + 4) & 0x0000ffff);
+ }
+
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 1, 1 * 4);
}
else {
- if (IS_LNG_TYPE(fi->type)) {
-
- disp = *((u4 *) (sp + 3 * 4));
-
- /* We patch the first instruction in the patcher stub
- stack and the second in the code. The first
- instruction is patched back later in
- patcher_wrapper. */
-
- if (disp == 4) {
- *((u4 *) (sp + 3 * 4)) |= (s2) ((fi->offset + 4) & 0x0000ffff);
- *((u4 *) (ra + 1 * 4)) |= (s2) ((fi->offset + 0) & 0x0000ffff);
- }
- else {
- *((u4 *) (sp + 3 * 4)) |= (s2) ((fi->offset + 0) & 0x0000ffff);
- *((u4 *) (ra + 1 * 4)) |= (s2) ((fi->offset + 4) & 0x0000ffff);
- }
- }
- else
- *((u4 *) (sp + 3 * 4)) |= (s2) (fi->offset & 0x0000ffff);
+ pr->mcode |= (fi->offset & 0x0000ffff);
}
- /* synchronize instruction cache */
-
- md_icacheflush(ra + 1 * 4, 2 * 4);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
******************************************************************************/
-bool patcher_invokestatic_special(u1 *sp)
+bool patcher_invokestatic_special(patchref_t *pr)
{
- unresolved_method *um;
- s4 disp;
- u1 *pv;
- methodinfo *m;
-
- /* get stuff from the stack */
-
- um = (unresolved_method *) *((ptrint *) (sp + 2 * 4));
- disp = *((s4 *) (sp + 1 * 4));
- pv = (u1 *) *((ptrint *) (sp + 0 * 4));
+ unresolved_method* um = (unresolved_method*) pr->ref;
+ uintptr_t* datap = (uintptr_t*) pr->datap;
- /* get the fieldinfo */
+ // Resolve the method.
+ methodinfo* m = resolve_method_eager(um);
- if (!(m = resolve_method_eager(um)))
+ if (m == NULL)
return false;
- /* patch stubroutine */
+ // Patch stubroutine.
+ *datap = (uintptr_t) m->stubroutine;
- *((ptrint *) (pv + disp)) = (ptrint) m->stubroutine;
+ // Synchronize data cache.
+ md_dcacheflush(datap, SIZEOF_VOID_P);
- /* synchronize data cache */
-
- md_dcacheflush(pv + disp, SIZEOF_VOID_P);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
*******************************************************************************/
-bool patcher_invokevirtual(u1 *sp)
+bool patcher_invokevirtual(patchref_t *pr)
{
- u1 *ra;
- unresolved_method *um;
- methodinfo *m;
- s4 disp;
-
- /* get stuff from the stack */
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 4));
- um = (unresolved_method *) *((ptrint *) (sp + 2 * 4));
+ uint32_t* pc = (uint32_t*) pr->mpc;
+ unresolved_method* um = (unresolved_method*) pr->ref;
- /* get the fieldinfo */
+ // Resolve the method.
+ methodinfo* m = resolve_method_eager(um);
- if (!(m = resolve_method_eager(um)))
+ if (m == NULL)
return false;
- /* if we show NOPs, we have to skip them */
-
- if (opt_shownops)
- ra = ra + 1 * 4;
-
- /* patch vftbl index */
+ // Patch vftbl index.
+ int32_t disp = (OFFSET(vftbl_t, table[0]) + sizeof(methodptr) * m->vftblindex);
- disp = (OFFSET(vftbl_t, table[0]) + sizeof(methodptr) * m->vftblindex);
+ pc[1] |= (disp & 0x0000ffff);
- *((s4 *) (ra + 1 * 4)) |= (disp & 0x0000ffff);
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 1, 1 * 4);
- /* synchronize instruction cache */
-
- md_icacheflush(ra + 1 * 4, 1 * 4);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
*******************************************************************************/
-bool patcher_invokeinterface(u1 *sp)
+bool patcher_invokeinterface(patchref_t *pr)
{
- u1 *ra;
- unresolved_method *um;
- methodinfo *m;
- s4 disp;
-
- /* get stuff from the stack */
+ uint32_t* pc = (uint32_t*) pr->mpc;
+ unresolved_method* um = (unresolved_method*) pr->ref;
- ra = (u1 *) *((ptrint *) (sp + 5 * 4));
- um = (unresolved_method *) *((ptrint *) (sp + 2 * 4));
+ // Resolve the method.
+ methodinfo* m = resolve_method_eager(um);
- /* get the fieldinfo */
-
- if (!(m = resolve_method_eager(um)))
+ if (m == NULL)
return false;
- /* if we show NOPs, we have to skip them */
-
- if (opt_shownops)
- ra = ra + 1 * 4;
-
- /* patch interfacetable index */
-
- disp = OFFSET(vftbl_t, interfacetable[0]) -
- sizeof(methodptr*) * m->class->index;
+ // Patch interfacetable index.
+ int32_t disp = OFFSET(vftbl_t, interfacetable[0]) - sizeof(methodptr*) * m->clazz->index;
/* XXX TWISTI: check displacement */
+ pc[1] |= (disp & 0x0000ffff);
- *((s4 *) (ra + 1 * 4)) |= (disp & 0x0000ffff);
-
- /* patch method offset */
-
- disp = sizeof(methodptr) * (m - m->class->methods);
+ // Patch method offset.
+ disp = sizeof(methodptr) * (m - m->clazz->methods);
/* XXX TWISTI: check displacement */
+ pc[2] |= (disp & 0x0000ffff);
- *((s4 *) (ra + 2 * 4)) |= (disp & 0x0000ffff);
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 1, 2 * 4);
- /* synchronize instruction cache */
-
- md_icacheflush(ra + 1 * 4, 2 * 4);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
-/* patcher_checkcast_instanceof_interface **************************************
+/* patcher_checkcast_interface *************************************************
Machine code:
<patched call position>
- 81870000 lwz r12,0(r7)
- 800c0010 lwz r0,16(r12)
- 34000000 addic. r0,r0,0
- 408101fc ble- 0x3002e518
- 800c0000 lwz r0,0(r12)
+ 81870000 lwz r12,0(r7)
+ 800c0010 lwz r0,16(r12)
+ 34000000 addic. r0,r0,0
+ 41810008 bgt- 0x014135d8
+ 83c00003 lwz r30,3(0)
+ 800c0000 lwz r0,0(r12)
*******************************************************************************/
-bool patcher_checkcast_instanceof_interface(u1 *sp)
+bool patcher_checkcast_interface(patchref_t *pr)
{
- u1 *ra;
- constant_classref *cr;
- classinfo *c;
- s4 disp;
+ uint32_t* pc = (uint32_t*) pr->mpc;
+ constant_classref* cr = (constant_classref*) pr->ref;
- /* get stuff from the stack */
+ // Resolve the class.
+ classinfo* c = resolve_classref_eager(cr);
- ra = (u1 *) *((ptrint *) (sp + 5 * 4));
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 4));
+ if (c == NULL)
+ return false;
- /* get the fieldinfo */
+ // Patch super class index.
+ int32_t disp = -(c->index);
+ pc[2] |= (disp & 0x0000ffff);
- if (!(c = resolve_classref_eager(cr)))
- return false;
+ disp = OFFSET(vftbl_t, interfacetable[0]) - c->index * sizeof(methodptr*);
+ pc[5] |= (disp & 0x0000ffff);
- /* if we show NOPs, we have to skip them */
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 2, 4 * 4);
- if (opt_shownops)
- ra = ra + 1 * 4;
+ // Patch back the original code.
+ patcher_patch_code(pr);
- /* patch super class index */
+ return true;
+}
- disp = -(c->index);
- *((s4 *) (ra + 2 * 4)) |= (disp & 0x0000ffff);
+/* patcher_instanceof_interface ************************************************
- disp = OFFSET(vftbl_t, interfacetable[0]) - c->index * sizeof(methodptr*);
+ Machine code:
+
+ <patched call position>
+ 81870000 lwz r12,0(r7)
+ 800c0010 lwz r0,16(r12)
+ 34000000 addic. r0,r0,0
+ 41810008 bgt- 0x014135d8
+ 83c00003 lwz r30,3(0)
+ 800c0000 lwz r0,0(r12)
+
+*******************************************************************************/
+
+bool patcher_instanceof_interface(patchref_t *pr)
+{
+ uint32_t* pc = (uint32_t*) pr->mpc;
+ constant_classref* cr = (constant_classref*) pr->ref;
+
+ // Resolve the class.
+ classinfo* c = resolve_classref_eager(cr);
- *((s4 *) (ra + 4 * 4)) |= (disp & 0x0000ffff);
+ if (c == NULL)
+ return false;
+
+ // Patch super class index.
+ int32_t disp = -(c->index);
+ pc[2] |= (disp & 0x0000ffff);
+
+ disp = OFFSET(vftbl_t, interfacetable[0]) - c->index * sizeof(methodptr*);
+ pc[4] |= (disp & 0x0000ffff);
- /* synchronize instruction cache */
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 2, 3 * 4);
- md_icacheflush(ra + 2 * 4, 3 * 4);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
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