/* 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.
#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/md.h"
#include "vm/jit/methodheader.h"
-#include "vm/jit/patcher-common.h"
-#include "vm/jit/stacktrace.h"
-
-#include "vmcore/class.h"
-#include "vmcore/field.h"
-#include "vmcore/options.h"
-#include "vm/resolve.h"
-#include "vmcore/references.h"
-
-
-#define PATCH_BACK_ORIGINAL_MCODE \
- *((u4 *) pr->mpc) = (u4) pr->mcode; \
- md_icacheflush((u1 *) pr->mpc, 4);
+#include "vm/jit/patcher-common.hpp"
/* patcher_patch_code **********************************************************
void patcher_patch_code(patchref_t *pr)
{
- PATCH_BACK_ORIGINAL_MCODE;
+ // Patch back original code.
+ *((uint32_t*) pr->mpc) = pr->mcode;
+
+ // Synchronize instruction cache.
+ md_icacheflush((void*) pr->mpc, 1 * 4);
+}
+
+
+/**
+ * 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)
+{
+ uint32_t mcode = *((uint32_t*) pc);
+
+ // Check for the undefined instruction we use.
+ return (mcode == 0x00000000);
}
bool patcher_resolve_classref_to_classinfo(patchref_t *pr)
{
- constant_classref *cr;
- u1 *datap;
- classinfo *c;
-
- /* get stuff from the stack */
-
- cr = (constant_classref *) pr->ref;
- datap = (u1 *) pr->datap;
+ constant_classref * cr = (constant_classref*) pr->ref;
+ uintptr_t* datap = (uintptr_t*) pr->datap;
- /* get the classinfo */
+ // Resolve the class.
+ classinfo* c = resolve_classref_eager(cr);
- if (!(c = resolve_classref_eager(cr)))
+ if (c == NULL)
return false;
- PATCH_BACK_ORIGINAL_MCODE;
-
- /* patch the classinfo pointer */
-
- *((ptrint *) datap) = (ptrint) c;
-
- /* synchronize data cache */
+ // Patch the class pointer.
+ *datap = (uintptr_t) c;
+ // Synchronize data cache.
md_dcacheflush(datap, SIZEOF_VOID_P);
+ // Patch back the original code.
+ patcher_patch_code(pr);
+
return true;
}
bool patcher_resolve_classref_to_vftbl(patchref_t *pr)
{
- constant_classref *cr;
- u1 *datap;
- classinfo *c;
-
- /* get stuff from the stack */
+ constant_classref* cr = (constant_classref*) pr->ref;
+ uintptr_t* datap = (uintptr_t*) pr->datap;
- cr = (constant_classref *) pr->ref;
- datap = (u1 *) pr->datap;
+ // Resolve the class.
+ classinfo* c = resolve_classref_eager(cr);
- /* get the fieldinfo */
-
- if (!(c = resolve_classref_eager(cr)))
+ if (c == NULL)
return false;
- PATCH_BACK_ORIGINAL_MCODE;
-
- /* patch super class' vftbl */
-
- *((ptrint *) datap) = (ptrint) c->vftbl;
-
- /* synchronize data cache */
+ // Patch super class' vftbl.
+ *datap = (uintptr_t) c->vftbl;
+ // Synchronize data cache.
md_dcacheflush(datap, SIZEOF_VOID_P);
+ // Patch back the original code.
+ patcher_patch_code(pr);
+
return true;
}
bool patcher_resolve_classref_to_flags(patchref_t *pr)
{
- constant_classref *cr;
- u1 *datap;
- classinfo *c;
-
- /* get stuff from the stack */
-
- cr = (constant_classref *) pr->ref;
- datap = (u1 *) pr->datap;
+ constant_classref* cr = (constant_classref*) pr->ref;
+ int32_t* datap = (int32_t*) pr->datap;
- /* get the fieldinfo */
+ // Resolve the class.
+ classinfo* c = resolve_classref_eager(cr);
- if (!(c = resolve_classref_eager(cr)))
+ if (c == NULL)
return false;
- PATCH_BACK_ORIGINAL_MCODE;
-
- /* patch class flags */
-
- *((s4 *) datap) = (s4) c->flags;
-
- /* synchronize data cache */
+ // Patch class flags.
+ *datap = c->flags;
+ // Synchronize data cache.
md_dcacheflush(datap, SIZEOF_VOID_P);
+ // Patch back the original code.
+ patcher_patch_code(pr);
+
return true;
}
bool patcher_get_putstatic(patchref_t *pr)
{
- u1 *ra;
- unresolved_field *uf;
- u1 *datap;
- fieldinfo *fi;
-
- /* get stuff from the stack */
+ unresolved_field* uf = (unresolved_field*) pr->ref;
+ uintptr_t* datap = (uintptr_t*) pr->datap;
- ra = (u1 *) pr->mpc;
- uf = (unresolved_field *) pr->ref;
- datap = (u1 *) pr->datap;
+ // 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_BACK_ORIGINAL_MCODE;
-
- /* patch the field value's address */
-
- *((intptr_t *) datap) = (intptr_t) fi->value;
-
- /* synchronize data cache */
+ // Patch the field value's address.
+ *datap = (uintptr_t) fi->value;
+ // Synchronize data cache.
md_dcacheflush(datap, SIZEOF_VOID_P);
+ // Patch back the original code.
+ patcher_patch_code(pr);
+
return true;
}
bool patcher_get_putfield(patchref_t *pr)
{
- u1 *ra;
- unresolved_field *uf;
- fieldinfo *fi;
- s2 disp;
-
- ra = (u1 *) pr->mpc;
- uf = (unresolved_field *) pr->ref;
+ 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;
- PATCH_BACK_ORIGINAL_MCODE;
-
- /* if we show NOPs, we have to skip them */
-
- if (opt_shownops)
- ra = ra + 1 * 4;
-
- /* patch the field's offset */
-
+ // 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. */
- disp = *((u4 *) (ra + 0 * 4));
+ uint32_t disp = (pr->mcode & 0x0000ffff);
if (disp == 4) {
- *((u4 *) (ra + 0 * 4)) &= 0xffff0000;
- *((u4 *) (ra + 0 * 4)) |= (s2) ((fi->offset + 4) & 0x0000ffff);
- *((u4 *) (ra + 1 * 4)) |= (s2) ((fi->offset + 0) & 0x0000ffff);
+ pr->mcode &= 0xffff0000;
+ pr->mcode |= ((fi->offset + 4) & 0x0000ffff);
+ pc[1] |= ((fi->offset + 0) & 0x0000ffff);
}
else {
- *((u4 *) (ra + 0 * 4)) |= (s2) ((fi->offset + 0) & 0x0000ffff);
- *((u4 *) (ra + 1 * 4)) &= 0xffff0000;
- *((u4 *) (ra + 1 * 4)) |= (s2) ((fi->offset + 4) & 0x0000ffff);
+ pr->mcode |= ((fi->offset + 0) & 0x0000ffff);
+ pc[1] &= 0xffff0000;
+ pc[1] |= ((fi->offset + 4) & 0x0000ffff);
}
- }
- else
- *((u4 *) (ra + 0 * 4)) |= (s2) (fi->offset & 0x0000ffff);
- /* synchronize instruction cache */
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 1, 1 * 4);
+ }
+ else {
+ pr->mcode |= (fi->offset & 0x0000ffff);
+ }
- md_icacheflush(ra + 0 * 4, 2 * 4);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
bool patcher_invokestatic_special(patchref_t *pr)
{
- unresolved_method *um;
- u1 *datap;
- methodinfo *m;
-
- /* get stuff from the stack */
-
- um = (unresolved_method *) pr->ref;
- datap = (u1 *) pr->datap;
+ 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_BACK_ORIGINAL_MCODE;
-
- /* patch stubroutine */
-
- *((ptrint *) datap) = (ptrint) m->stubroutine;
-
- /* synchronize data cache */
+ // Patch stubroutine.
+ *datap = (uintptr_t) m->stubroutine;
+ // Synchronize data cache.
md_dcacheflush(datap, SIZEOF_VOID_P);
+ // Patch back the original code.
+ patcher_patch_code(pr);
+
return true;
}
bool patcher_invokevirtual(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 *) pr->mpc;
- um = (unresolved_method *) pr->ref;
+ // Resolve the method.
+ methodinfo* m = resolve_method_eager(um);
- /* get the fieldinfo */
-
- if (!(m = resolve_method_eager(um)))
+ if (m == NULL)
return false;
- PATCH_BACK_ORIGINAL_MCODE;
-
- /* if we show NOPs, we have to skip them */
-
- if (opt_shownops)
- ra = ra + 1 * 4;
-
- /* patch vftbl index */
-
- disp = (OFFSET(vftbl_t, table[0]) + sizeof(methodptr) * m->vftblindex);
+ // Patch vftbl index.
+ int32_t disp = (OFFSET(vftbl_t, table[0]) + sizeof(methodptr) * m->vftblindex);
- *((s4 *) (ra + 1 * 4)) |= (disp & 0x0000ffff);
+ pc[1] |= (disp & 0x0000ffff);
- /* synchronize instruction cache */
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 1, 1 * 4);
- md_icacheflush(ra + 1 * 4, 1 * 4);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
bool patcher_invokeinterface(patchref_t *pr)
{
- u1 *ra;
- unresolved_method *um;
- methodinfo *m;
- s4 disp;
+ uint32_t* pc = (uint32_t*) pr->mpc;
+ unresolved_method* um = (unresolved_method*) pr->ref;
- /* get stuff from the stack */
+ // Resolve the method.
+ methodinfo* m = resolve_method_eager(um);
- ra = (u1 *) pr->mpc;
- um = (unresolved_method *) pr->ref;
-
- /* get the fieldinfo */
-
- if (!(m = resolve_method_eager(um)))
+ if (m == NULL)
return false;
- PATCH_BACK_ORIGINAL_MCODE;
-
- /* 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;
}
bool patcher_checkcast_interface(patchref_t *pr)
{
- u1 *ra;
- constant_classref *cr;
- classinfo *c;
- s4 disp;
-
- /* get stuff from the stack */
+ uint32_t* pc = (uint32_t*) pr->mpc;
+ constant_classref* cr = (constant_classref*) pr->ref;
- ra = (u1 *) pr->mpc;
- cr = (constant_classref *) pr->ref;
+ // Resolve the class.
+ classinfo* c = resolve_classref_eager(cr);
- /* get the fieldinfo */
-
- if (!(c = resolve_classref_eager(cr)))
+ if (c == NULL)
return false;
- PATCH_BACK_ORIGINAL_MCODE;
-
- /* if we show NOPs, we have to skip them */
-
- if (opt_shownops)
- ra = ra + 1 * 4;
-
- /* patch super class index */
-
- disp = -(c->index);
-
- *((s4 *) (ra + 2 * 4)) |= (disp & 0x0000ffff);
+ // Patch super class index.
+ int32_t disp = -(c->index);
+ pc[2] |= (disp & 0x0000ffff);
disp = OFFSET(vftbl_t, interfacetable[0]) - c->index * sizeof(methodptr*);
+ pc[5] |= (disp & 0x0000ffff);
- *((s4 *) (ra + 5 * 4)) |= (disp & 0x0000ffff);
-
- /* synchronize instruction cache */
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 2, 4 * 4);
- md_icacheflush(ra + 2 * 4, 4 * 4);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
bool patcher_instanceof_interface(patchref_t *pr)
{
- u1 *ra;
- constant_classref *cr;
- classinfo *c;
- s4 disp;
-
- /* get stuff from the stack */
+ uint32_t* pc = (uint32_t*) pr->mpc;
+ constant_classref* cr = (constant_classref*) pr->ref;
- ra = (u1 *) pr->mpc;
- cr = (constant_classref *) pr->ref;
+ // Resolve the class.
+ classinfo* c = resolve_classref_eager(cr);
- /* get the fieldinfo */
-
- if (!(c = resolve_classref_eager(cr)))
+ if (c == NULL)
return false;
- PATCH_BACK_ORIGINAL_MCODE;
-
- /* if we show NOPs, we have to skip them */
-
- if (opt_shownops)
- ra = ra + 1 * 4;
-
- /* patch super class index */
-
- disp = -(c->index);
-
- *((s4 *) (ra + 2 * 4)) |= (disp & 0x0000ffff);
+ // 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);
- *((s4 *) (ra + 4 * 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;
}
projects / cacao.git / blobdiff