/* src/vm/jit/x86_64/patcher.c - x86_64 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, 2009
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: patcher.c 7596 2007-03-28 21:05:53Z twisti $
-
*/
#include "config.h"
-#include "vm/types.h"
-#include "vm/jit/x86_64/codegen.h"
+#include <stdint.h>
-#include "mm/memory.h"
+#include "vm/types.h"
-#include "native/native.h"
+#include "vm/jit/x86_64/codegen.h"
+#include "vm/jit/x86_64/md.h"
-#include "vm/builtin.h"
-#include "vm/exceptions.h"
-#include "vm/initialize.h"
+#include "mm/memory.hpp"
-#include "vm/jit/patcher.h"
-#include "vm/jit/stacktrace.h"
+#include "native/native.hpp"
-#include "vmcore/class.h"
-#include "vmcore/field.h"
-#include "vmcore/options.h"
-#include "vmcore/references.h"
-#include "vm/resolve.h"
+#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/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;
- functionptr f;
- bool result;
- java_objectheader *e;
-
- /* define the patcher function */
-
- bool (*patcher_function)(u1 *);
-
- /* get stuff from the stack */
-
- xpc = (u1 *) *((ptrint *) (sp + 5 * 8));
- o = (java_objectheader *) *((ptrint *) (sp + 4 * 8));
- f = (functionptr) *((ptrint *) (sp + 0 * 8));
-
- /* calculate and set the new return address */
-
- xpc = xpc - PATCHER_CALL_SIZE;
-
- *((ptrint *) (sp + 5 * 8)) = (ptrint) xpc;
-
- /* 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 */
-
- /* RA is passed as NULL, but the XPC is correct and can be used in
- stacktrace_create_extern_stackframeinfo for
- md_codegen_get_pv_from_pc. */
-
- stacktrace_create_extern_stackframeinfo(&sfi, pv, sp + 6 * 8, xpc, xpc);
-
- /* call the proper patcher function */
-
- result = (patcher_function)(sp);
-
- /* remove the stackframeinfo */
-
- stacktrace_remove_stackframeinfo(&sfi);
+ *((uint16_t*) pr->mpc) = (uint16_t) pr->mcode;
+ md_icacheflush((void*) pr->mpc, PATCHER_CALL_SIZE);
+}
- /* check for return value and exit accordingly */
+/**
+ * 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)
+{
+ uint16_t mcode = *((uint16_t*) pc);
- if (result == false) {
- e = exceptions_get_and_clear_exception();
+ // Check for the undefined instruction we use.
+ return (mcode == 0x0b0f);
+}
- PATCHER_MONITOREXIT;
- return e;
- }
+/* patcher_resolve_classref_to_classinfo ***************************************
- PATCHER_MARK_PATCHED_MONITOREXIT;
+ ACONST:
- return NULL;
-}
+ <patched call position>
+ 48 bf a0 f0 92 00 00 00 00 00 mov $0x92f0a0,%rdi
+ MULTIANEWARRAY:
-/* patcher_get_putstatic *******************************************************
+ <patched call position>
+ 48 be 30 40 b2 00 00 00 00 00 mov $0xb24030,%rsi
+ 48 89 e2 mov %rsp,%rdx
+ 48 b8 7c 96 4b 00 00 00 00 00 mov $0x4b967c,%rax
+ 48 ff d0 callq *%rax
- Machine code:
+ ARRAYCHECKCAST:
<patched call position>
- 4d 8b 15 86 fe ff ff mov -378(%rip),%r10
- 49 8b 32 mov (%r10),%rsi
+ 48 be b8 3f b2 00 00 00 00 00 mov $0xb23fb8,%rsi
+ 48 b8 00 00 00 00 00 00 00 00 mov $0x0,%rax
+ 48 ff d0 callq *%rax
*******************************************************************************/
-bool patcher_get_putstatic(u1 *sp)
+bool patcher_resolve_classref_to_classinfo(patchref_t *pr)
{
- u1 *ra;
- u8 mcode;
- unresolved_field *uf;
- s4 disp;
- fieldinfo *fi;
-
- /* get stuff from the stack */
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- uf = (unresolved_field *) *((ptrint *) (sp + 2 * 8));
- disp = *((s4 *) (sp + 1 * 8));
+ constant_classref* cr = (constant_classref*) pr->ref;
+ uintptr_t* datap = (uintptr_t*) pr->datap;
- /* get the fieldinfo */
+ // Resolve the class.
+ classinfo* c = resolve_classref_eager(cr);
- if (!(fi = resolve_field_eager(uf)))
+ if (c == NULL)
return false;
- /* check if the field's class is initialized */
+ // Patch the class.
+ *datap = (uintptr_t) c;
- if (!(fi->class->state & CLASS_INITIALIZED))
- if (!initialize_class(fi->class))
- return false;
-
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
-
- /* if we show disassembly, we have to skip the nop's */
-
- if (opt_shownops)
- ra = ra + 5;
+ // Synchronize data cache.
+ md_dcacheflush((void*) pr->datap, SIZEOF_VOID_P);
- /* patch the field value's address */
-
- *((ptrint *) (ra + 7 + disp)) = (ptrint) &(fi->value);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
-/* patcher_get_putfield ********************************************************
+/* patcher_resolve_classref_to_vftbl *******************************************
- Machine code:
+ CHECKCAST (class):
+ INSTANCEOF (class):
<patched call position>
- 45 8b 8f 00 00 00 00 mov 0x0(%r15),%r9d
*******************************************************************************/
-bool patcher_get_putfield(u1 *sp)
+bool patcher_resolve_classref_to_vftbl(patchref_t *pr)
{
- u1 *ra;
- u8 mcode;
- unresolved_field *uf;
- fieldinfo *fi;
- u1 byte;
+ constant_classref* cr = (constant_classref*) pr->ref;
+ uintptr_t* datap = (uintptr_t*) pr->datap;
- /* get stuff from the stack */
+ // Resolve the field.
+ classinfo* c = resolve_classref_eager(cr);
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- uf = (unresolved_field *) *((ptrint *) (sp + 2 * 8));
-
- /* get the fieldinfo */
-
- if (!(fi = resolve_field_eager(uf)))
+ if (c == NULL)
return false;
- /* patch back original code (instruction code is smaller than 8 bytes) */
-
- *((u4 *) (ra + 0)) = (u4) mcode;
- *((u1 *) (ra + 4)) = (u1) (mcode >> 32);
+ // Patch super class' vftbl.
+ *datap = (uintptr_t) c->vftbl;
- /* if we show disassembly, we have to skip the nop's */
+ // Synchronize data cache.
+ md_dcacheflush((void*) pr->datap, SIZEOF_VOID_P);
- if (opt_shownops)
- ra = ra + 5;
-
- /* patch the field's offset: we check for the field type, because the */
- /* instructions have different lengths */
-
- if (IS_INT_LNG_TYPE(fi->type)) {
- /* check for special case: %rsp or %r12 as base register */
-
- byte = *(ra + 3);
-
- if (byte == 0x24)
- *((u4 *) (ra + 4)) = (u4) (fi->offset);
- else
- *((u4 *) (ra + 3)) = (u4) (fi->offset);
- }
- else {
- /* check for special case: %rsp or %r12 as base register */
-
- byte = *(ra + 5);
-
- if (byte == 0x24)
- *((u4 *) (ra + 6)) = (u4) (fi->offset);
- else
- *((u4 *) (ra + 5)) = (u4) (fi->offset);
- }
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
-/* patcher_putfieldconst *******************************************************
+/* patcher_resolve_classref_to_flags *******************************************
- Machine code:
+ CHECKCAST/INSTANCEOF:
<patched call position>
- 41 c7 85 00 00 00 00 7b 00 00 00 movl $0x7b,0x0(%r13)
*******************************************************************************/
-bool patcher_putfieldconst(u1 *sp)
+bool patcher_resolve_classref_to_flags(patchref_t *pr)
{
- u1 *ra;
- u8 mcode;
- unresolved_field *uf;
- fieldinfo *fi;
-
- /* get stuff from the stack */
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- uf = (unresolved_field *) *((ptrint *) (sp + 2 * 8));
+ constant_classref* cr = (constant_classref*) pr->ref;
+/* int32_t* datap = (int32_t*) pr->datap; */
+ uint8_t* ra = (uint8_t*) pr->mpc;
- /* get the fieldinfo */
+ // Resolve the field.
+ classinfo* c = resolve_classref_eager(cr);
- if (!(fi = resolve_field_eager(uf)))
+ if (c == NULL)
return false;
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
-
- /* if we show disassembly, we have to skip the nop's */
+ ra += PATCHER_CALL_SIZE;
- if (opt_shownops)
- ra = ra + 5;
+ // Patch class flags.
+/* *datap = c->flags; */
+ *((int32_t*) (ra + 2)) = c->flags;
- /* patch the field's offset */
-
- if (IS_2_WORD_TYPE(fi->type) || IS_ADR_TYPE(fi->type)) {
- /* handle special case when the base register is %r12 */
-
- if (*(ra + 2) == 0x84) {
- *((u4 *) (ra + 4)) = (u4) (fi->offset);
- *((u4 *) (ra + 12 + 4)) = (u4) (fi->offset + 4);
- }
- else {
- *((u4 *) (ra + 3)) = (u4) (fi->offset);
- *((u4 *) (ra + 11 + 3)) = (u4) (fi->offset + 4);
- }
- }
- else {
- /* handle special case when the base register is %r12 */
+ // Synchronize data cache.
+/* md_dcacheflush(datap, sizeof(int32_t)); */
+ md_icacheflush(ra + 2, sizeof(int32_t));
- if (*(ra + 2) == 0x84)
- *((u4 *) (ra + 4)) = (u4) (fi->offset);
- else
- *((u4 *) (ra + 3)) = (u4) (fi->offset);
- }
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
-/* patcher_aconst **************************************************************
+/* patcher_get_putstatic *******************************************************
Machine code:
<patched call position>
- 48 bf a0 f0 92 00 00 00 00 00 mov $0x92f0a0,%rdi
+ 4d 8b 15 86 fe ff ff mov -378(%rip),%r10
+ 49 8b 32 mov (%r10),%rsi
*******************************************************************************/
-bool patcher_aconst(u1 *sp)
+bool patcher_get_putstatic(patchref_t *pr)
{
- u1 *ra;
- u8 mcode;
- constant_classref *cr;
- classinfo *c;
-
- /* get stuff from the stack */
+ unresolved_field* uf = (unresolved_field*) pr->ref;
+ uintptr_t* datap = (uintptr_t*) pr->datap;
+ uint8_t* ra = (uint8_t*) pr->mpc;
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 8));
+ // Resolve the field.
+ fieldinfo* fi = resolve_field_eager(uf);
- /* get the classinfo */
-
- if (!(c = resolve_classref_eager(cr)))
+ if (fi == NULL)
return false;
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
+ ra += PATCHER_CALL_SIZE;
- /* if we show disassembly, we have to skip the nop's */
+ // Check if the field's class is initialized/
+ if (!(fi->clazz->state & CLASS_INITIALIZED))
+ if (!initialize_class(fi->clazz))
+ return false;
- if (opt_shownops)
- ra = ra + 5;
+ // Patch the field value's address.
+ *datap = (uintptr_t) fi->value;
- /* patch the classinfo pointer */
+ // Synchronize data cache.
+ md_dcacheflush((void*) pr->datap, SIZEOF_VOID_P);
- *((ptrint *) (ra + 2)) = (ptrint) c;
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
-/* patcher_builtin_multianewarray **********************************************
+/* patcher_get_putfield ********************************************************
Machine code:
<patched call position>
- 48 bf 02 00 00 00 00 00 00 00 mov $0x2,%rdi
- 48 be 30 40 b2 00 00 00 00 00 mov $0xb24030,%rsi
- 48 89 e2 mov %rsp,%rdx
- 48 b8 7c 96 4b 00 00 00 00 00 mov $0x4b967c,%rax
- 48 ff d0 callq *%rax
+ 45 8b 8f 00 00 00 00 mov 0x0(%r15),%r9d
*******************************************************************************/
-bool patcher_builtin_multianewarray(u1 *sp)
+bool patcher_get_putfield(patchref_t *pr)
{
- u1 *ra;
- u8 mcode;
- constant_classref *cr;
- classinfo *c;
-
- /* get stuff from the stack */
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 8));
+ uint8_t* pc = (uint8_t*) pr->mpc;
+ unresolved_field* uf = (unresolved_field*) pr->ref;
- /* get the classinfo */
+ // Resolve the field.
+ fieldinfo* fi = resolve_field_eager(uf);
- if (!(c = resolve_classref_eager(cr)))
+ if (fi == NULL)
return false;
- /* patch back original code */
+ pc += PATCHER_CALL_SIZE;
- *((u8 *) ra) = mcode;
-
- /* if we show disassembly, we have to skip the nop's */
-
- if (opt_shownops)
- ra = ra + 5;
+ // Patch the field's offset: we check for the field type, because
+ // the instructions have different lengths.
+ if (IS_INT_LNG_TYPE(fi->type)) {
+ // Check for special case: %rsp or %r12 as base register.
+ if (pc[3] == 0x24)
+ *((int32_t*) (pc + 4)) = fi->offset;
+ else
+ *((int32_t*) (pc + 3)) = fi->offset;
+ }
+ else {
+ // Check for special case: %rsp or %r12 as base register.
+ if (pc[5] == 0x24)
+ *((int32_t*) (pc + 6)) = fi->offset;
+ else
+ *((int32_t*) (pc + 5)) = fi->offset;
+ }
- /* patch the classinfo pointer */
+ // Synchronize instruction cache.
+ md_icacheflush(pc, 6 + sizeof(int32_t));
- *((ptrint *) (ra + 10 + 2)) = (ptrint) c;
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
-/* patcher_builtin_arraycheckcast **********************************************
+/* patcher_putfieldconst *******************************************************
Machine code:
<patched call position>
- 48 be b8 3f b2 00 00 00 00 00 mov $0xb23fb8,%rsi
- 48 b8 00 00 00 00 00 00 00 00 mov $0x0,%rax
- 48 ff d0 callq *%rax
+ 41 c7 85 00 00 00 00 7b 00 00 00 movl $0x7b,0x0(%r13)
*******************************************************************************/
-bool patcher_builtin_arraycheckcast(u1 *sp)
+bool patcher_putfieldconst(patchref_t *pr)
{
- u1 *ra;
- u8 mcode;
- constant_classref *cr;
- classinfo *c;
-
- /* get stuff from the stack */
+ uint8_t* pc = (uint8_t*) pr->mpc;
+ unresolved_field* uf = (unresolved_field*) pr->ref;
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 8));
+ // Resolve the field.
+ fieldinfo* fi = resolve_field_eager(uf);
- /* get the classinfo */
-
- if (!(c = resolve_classref_eager(cr)))
+ if (fi == NULL)
return false;
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
+ pc += PATCHER_CALL_SIZE;
- /* if we show disassembly, we have to skip the nop's */
-
- if (opt_shownops)
- ra = ra + 5;
+ // Patch the field's offset.
+ if (IS_2_WORD_TYPE(fi->type) || IS_ADR_TYPE(fi->type)) {
+ // Handle special case when the base register is %r12.
+ if (pc[12] == 0x94)
+ *((uint32_t*) (pc + 14)) = fi->offset;
+ else
+ *((uint32_t*) (pc + 13)) = fi->offset;
+ }
+ else {
+ // Handle special case when the base register is %r12.
+ if (pc[2] == 0x84)
+ *((uint32_t*) (pc + 4)) = fi->offset;
+ else
+ *((uint32_t*) (pc + 3)) = fi->offset;
+ }
- /* patch the classinfo pointer */
+ // Synchronize instruction cache.
+ md_icacheflush(pc, 14 + sizeof(int32_t));
- *((ptrint *) (ra + 2)) = (ptrint) c;
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
*******************************************************************************/
-bool patcher_invokestatic_special(u1 *sp)
+bool patcher_invokestatic_special(patchref_t *pr)
{
- u1 *ra;
- u8 mcode;
- unresolved_method *um;
- s4 disp;
- methodinfo *m;
+ unresolved_method* um = (unresolved_method*) pr->ref;
+ uintptr_t* datap = (uintptr_t*) pr->datap;
- /* get stuff from the stack */
+ // Resolve the method.
+ methodinfo* m = resolve_method_eager(um);
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- um = (unresolved_method *) *((ptrint *) (sp + 2 * 8));
- disp = *((s4 *) (sp + 1 * 8));
-
- /* get the fieldinfo */
-
- if (!(m = resolve_method_eager(um)))
+ if (m == NULL)
return false;
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
-
- /* if we show disassembly, we have to skip the nop's */
+ // Patch stubroutine.
+ *datap = (uintptr_t) m->stubroutine;
- if (opt_shownops)
- ra = ra + PATCHER_CALL_SIZE;
+ // Synchronize data cache.
+ md_dcacheflush((void*) pr->datap, SIZEOF_VOID_P);
- /* patch stubroutine */
-
-/* *((ptrint *) (ra + 2)) = (ptrint) m->stubroutine; */
- *((ptrint *) (ra + 7 + disp)) = (ptrint) m->stubroutine;
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
*******************************************************************************/
-bool patcher_invokevirtual(u1 *sp)
+bool patcher_invokevirtual(patchref_t *pr)
{
- u1 *ra;
- u8 mcode;
- unresolved_method *um;
- methodinfo *m;
-
- /* get stuff from the stack */
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- um = (unresolved_method *) *((ptrint *) (sp + 2 * 8));
+ uint8_t* pc = (uint8_t*) pr->mpc;
+ unresolved_method* um = (unresolved_method*) pr->ref;
- /* get the fieldinfo */
+ // Resovlve the method.
+ methodinfo* m = resolve_method_eager(um);
- if (!(m = resolve_method_eager(um)))
+ if (m == NULL)
return false;
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
-
- /* if we show disassembly, we have to skip the nop's */
+ pc += PATCHER_CALL_SIZE;
- if (opt_shownops)
- ra = ra + 5;
+ // Patch vftbl index.
+ *((int32_t*) (pc + 3 + 3)) = (int32_t) (OFFSET(vftbl_t, table[0]) + sizeof(methodptr) * m->vftblindex);
- /* patch vftbl index */
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 3 + 3, SIZEOF_VOID_P);
- *((s4 *) (ra + 3 + 3)) = (s4) (OFFSET(vftbl_t, table[0]) +
- sizeof(methodptr) * m->vftblindex);
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
*******************************************************************************/
-bool patcher_invokeinterface(u1 *sp)
+bool patcher_invokeinterface(patchref_t *pr)
{
- u1 *ra;
- u8 mcode;
- unresolved_method *um;
- methodinfo *m;
+ uint8_t* pc = (uint8_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 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- um = (unresolved_method *) *((ptrint *) (sp + 2 * 8));
-
- /* get the fieldinfo */
-
- if (!(m = resolve_method_eager(um)))
+ if (m == NULL)
return false;
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
-
- /* if we show disassembly, we have to skip the nop's */
+ pc += PATCHER_CALL_SIZE;
- if (opt_shownops)
- ra = ra + 5;
+ // Patch interfacetable index.
+ *((int32_t*) (pc + 3 + 3)) = (int32_t) (OFFSET(vftbl_t, interfacetable[0]) - sizeof(methodptr) * m->clazz->index);
- /* patch interfacetable index */
+ // Patch method offset.
+ *((int32_t*) (pc + 3 + 7 + 3)) = (int32_t) (sizeof(methodptr) * (m - m->clazz->methods));
- *((s4 *) (ra + 3 + 3)) = (s4) (OFFSET(vftbl_t, interfacetable[0]) -
- sizeof(methodptr) * m->class->index);
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 3 + 3, SIZEOF_VOID_P + 3 + SIZEOF_VOID_P);
- /* patch method offset */
-
- *((s4 *) (ra + 3 + 7 + 3)) =
- (s4) (sizeof(methodptr) * (m - m->class->methods));
-
- return true;
-}
-
-
-/* patcher_checkcast_instanceof_flags ******************************************
-
- Machine code:
-
- <patched call position>
- 41 ba 00 00 00 00 mov $0x0,%r10d
- 41 81 e2 00 02 00 00 and $0x200,%r10d
- 0f 84 35 00 00 00 je 0x00002aaaaab01479
-
-*******************************************************************************/
-
-bool patcher_checkcast_instanceof_flags(u1 *sp)
-{
- u1 *ra;
- u8 mcode;
- constant_classref *cr;
- classinfo *c;
-
- /* get stuff from the stack */
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 8));
-
- /* get the fieldinfo */
-
- if (!(c = resolve_classref_eager(cr)))
- return false;
-
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
-
- /* if we show disassembly, we have to skip the nop's */
-
- if (opt_shownops)
- ra = ra + 5;
-
- /* patch class flags */
-
- *((s4 *) (ra + 2)) = (s4) c->flags;
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
*******************************************************************************/
-bool patcher_checkcast_interface(u1 *sp)
+bool patcher_checkcast_interface(patchref_t *pr)
{
- u1 *ra;
- u8 mcode;
- constant_classref *cr;
- classinfo *c;
-
- /* get stuff from the stack */
+ uint8_t* pc = (uint8_t*) pr->mpc;
+ constant_classref* cr = (constant_classref*) pr->ref;
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 8));
+ // 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 code */
-
- *((u8 *) ra) = mcode;
-
- /* if we show disassembly, we have to skip the nop's */
+ pc += PATCHER_CALL_SIZE;
- if (opt_shownops)
- ra = ra + PATCHER_CALL_SIZE;
+ // Patch super class index.
+ *((int32_t*) (pc + 7 + 3)) = c->index;
- /* patch super class index */
+ *((int32_t*) (pc + 7 + 7 + 6 + 8 + 3)) = (int32_t) (OFFSET(vftbl_t, interfacetable[0]) - c->index * sizeof(methodptr*));
- *((s4 *) (ra + 7 + 3)) = (s4) c->index;
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 7 + 3, sizeof(int32_t) + 6 + 8 + 3 + sizeof(int32_t));
- *((s4 *) (ra + 7 + 7 + 6 + 8 + 3)) =
- (s4) (OFFSET(vftbl_t, interfacetable[0]) -
- c->index * sizeof(methodptr*));
-
- return true;
-}
-
-
-/* patcher_checkcast_class *****************************************************
-
- Machine code:
-
- <patched call position>
- 49 bb 00 00 00 00 00 00 00 00 mov $0x0,%r11
- 45 8b 92 20 00 00 00 mov 0x20(%r10),%r10d
- 45 8b 9b 20 00 00 00 mov 0x20(%r11),%r11d
- 4d 29 da sub %r11,%r10
- 49 bb 00 00 00 00 00 00 00 00 mov $0x0,%r11
-
-*******************************************************************************/
-
-bool patcher_checkcast_class(u1 *sp)
-{
- u1 *ra;
- u8 mcode;
- constant_classref *cr;
- classinfo *c;
-
- /* get stuff from the stack */
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 8));
-
- /* get the fieldinfo */
-
- if (!(c = resolve_classref_eager(cr)))
- return false;
-
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
-
- /* if we show disassembly, we have to skip the nop's */
-
- if (opt_shownops)
- ra = ra + 5;
-
- /* patch super class' vftbl */
-
- *((ptrint *) (ra + 2)) = (ptrint) c->vftbl;
- *((ptrint *) (ra + 10 + 7 + 7 + 3 + 2)) = (ptrint) c->vftbl;
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
*******************************************************************************/
-bool patcher_instanceof_interface(u1 *sp)
+bool patcher_instanceof_interface(patchref_t *pr)
{
- u1 *ra;
- u8 mcode;
- constant_classref *cr;
- classinfo *c;
+ uint8_t* pc = (uint8_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 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 8));
-
- /* get the fieldinfo */
-
- if (!(c = resolve_classref_eager(cr)))
+ if (c == NULL)
return false;
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
-
- /* if we show disassembly, we have to skip the nop's */
-
- if (opt_shownops)
- ra = ra + PATCHER_CALL_SIZE;
-
- /* patch super class index */
-
- *((s4 *) (ra + 7 + 3)) = (s4) c->index;
-
- *((s4 *) (ra + 7 + 7 + 6 + 3)) =
- (s4) (OFFSET(vftbl_t, interfacetable[0]) -
- c->index * sizeof(methodptr*));
-
- return true;
-}
-
-
-/* patcher_instanceof_class ****************************************************
-
- Machine code:
-
- <patched call position>
- 49 ba 00 00 00 00 00 00 00 00 mov $0x0,%r10
-
-*******************************************************************************/
-
-bool patcher_instanceof_class(u1 *sp)
-{
- u1 *ra;
- u8 mcode;
- constant_classref *cr;
- classinfo *c;
-
- /* get stuff from the stack */
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- cr = (constant_classref *) *((ptrint *) (sp + 2 * 8));
-
- /* get the fieldinfo */
-
- if (!(c = resolve_classref_eager(cr)))
- return false;
-
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
-
- /* if we show disassembly, we have to skip the nop's */
-
- if (opt_shownops)
- ra = ra + 5;
-
- /* patch super class' vftbl */
-
- *((ptrint *) (ra + 2)) = (ptrint) c->vftbl;
-
- return true;
-}
-
-
-/* patcher_clinit **************************************************************
-
- May be used for GET/PUTSTATIC and in native stub.
-
- Machine code:
-
- <patched call position>
- 4d 8b 15 92 ff ff ff mov -110(%rip),%r10
- 49 89 1a mov %rbx,(%r10)
-
-*******************************************************************************/
-
-bool patcher_clinit(u1 *sp)
-{
- u1 *ra;
- u8 mcode;
- classinfo *c;
-
- /* get stuff from the stack */
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- c = (classinfo *) *((ptrint *) (sp + 2 * 8));
-
- /* check if the class is initialized */
-
- if (!(c->state & CLASS_INITIALIZED))
- if (!initialize_class(c))
- return false;
-
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
-
- return true;
-}
-
-
-/* patcher_athrow_areturn ******************************************************
-
- Machine code:
-
- <patched call position>
-
-*******************************************************************************/
-
-#ifdef ENABLE_VERIFIER
-bool patcher_athrow_areturn(u1 *sp)
-{
- u1 *ra;
- u8 mcode;
- unresolved_class *uc;
-
- /* get stuff from the stack */
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- uc = (unresolved_class *) *((ptrint *) (sp + 2 * 8));
-
- /* resolve the class and check subtype constraints */
-
- if (!resolve_class_eager_no_access_check(uc))
- return false;
-
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
-
- return true;
-}
-#endif /* ENABLE_VERIFIER */
-
-
-/* patcher_resolve_native ******************************************************
-
- Machine code:
-
- <patched call position>
- 48 b8 00 00 00 00 00 00 00 00 mov $0x0,%rax
- 48 ff d0 callq *%rax
-
-*******************************************************************************/
-
-#if !defined(WITH_STATIC_CLASSPATH)
-bool patcher_resolve_native(u1 *sp)
-{
- u1 *ra;
- u8 mcode;
- methodinfo *m;
- functionptr f;
-
- /* get stuff from the stack */
-
- ra = (u1 *) *((ptrint *) (sp + 5 * 8));
- mcode = *((u8 *) (sp + 3 * 8));
- m = (methodinfo *) *((ptrint *) (sp + 2 * 8));
-
- /* resolve native function */
-
- if (!(f = native_resolve_function(m)))
- return false;
-
- /* patch back original code */
-
- *((u8 *) ra) = mcode;
+ pc += PATCHER_CALL_SIZE;
- /* if we show disassembly, we have to skip the nop's */
+ // Patch super class index.
+ *((int32_t*) (pc + 7 + 3)) = c->index;
- if (opt_shownops)
- ra = ra + 5;
+ *((int32_t*) (pc + 7 + 7 + 6 + 3)) = (int32_t) (OFFSET(vftbl_t, interfacetable[0]) - c->index * sizeof(methodptr*));
- /* patch native function pointer */
+ // Synchronize instruction cache.
+ md_icacheflush(pc + 7 + 3, sizeof(int32_t) + 6 + 3 + sizeof(int32_t));
- *((ptrint *) (ra + 2)) = (ptrint) f;
+ // Patch back the original code.
+ patcher_patch_code(pr);
return true;
}
-#endif /* !defined(WITH_STATIC_CLASSPATH) */
/*
projects / cacao.git / blobdiff