/* src/vm/jit/powerpc64/emit.c - PowerPC64 code emitter 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
This file is part of CACAO.
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: emitfuncs.c 4398 2006-01-31 23:43:08Z twisti $
-
*/
#include "md-abi.h"
#include "vm/jit/powerpc64/codegen.h"
-#include "vmcore/options.h"
+#include "threads/lock-common.h"
-#include "vm/builtin.h"
-#include "vm/exceptions.h"
-#include "vm/vm.h"
+#include "vm/options.h"
+#include "vm/vm.hpp"
#include "vm/jit/abi.h"
#include "vm/jit/asmpart.h"
#include "vm/jit/emit-common.h"
-#include "vm/jit/jit.h"
-
-#if defined(ENABLE_THREADS)
-# include "threads/native/lock.h"
-#endif
+#include "vm/jit/jit.hpp"
+#include "vm/jit/trace.hpp"
+#include "vm/jit/trap.h"
/* emit_load *******************************************************************
if (src->flags & INMEMORY) {
COUNT_SPILLS;
- disp = src->vv.regoff * 8;
+ disp = src->vv.regoff;
if (IS_FLT_DBL_TYPE(src->type)) {
M_DLD(tempreg, REG_SP, disp);
COUNT_SPILLS;
if (IS_FLT_DBL_TYPE(dst->type)) {
- M_DST(d, REG_SP, dst->vv.regoff * 8);
+ M_DST(d, REG_SP, dst->vv.regoff);
}
else {
- M_LST(d, REG_SP, dst->vv.regoff * 8);
+ M_LST(d, REG_SP, dst->vv.regoff);
}
}
}
*******************************************************************************/
-void emit_copy(jitdata *jd, instruction *iptr, varinfo *src, varinfo *dst)
+void emit_copy(jitdata *jd, instruction *iptr)
{
- codegendata *cd;
- registerdata *rd;
- s4 s1, d;
+ codegendata *cd;
+ varinfo *src;
+ varinfo *dst;
+ s4 s1, d;
/* get required compiler data */
cd = jd->cd;
- rd = jd->rd;
+
+ /* get source and destination variables */
+
+ src = VAROP(iptr->s1);
+ dst = VAROP(iptr->dst);
if ((src->vv.regoff != dst->vv.regoff) ||
((src->flags ^ dst->flags) & INMEMORY)) {
+ if ((src->type == TYPE_RET) || (dst->type == TYPE_RET)) {
+ /* emit nothing, as the value won't be used anyway */
+ return;
+ }
+
/* If one of the variables resides in memory, we can eliminate
the register move from/to the temporary register with the
order of getting the destination register and the load. */
if (IS_INMEMORY(src->flags)) {
- d = codegen_reg_of_var(iptr->opc, dst, REG_IFTMP);
+ d = codegen_reg_of_var(iptr->opc, dst, REG_IFTMP);
s1 = emit_load(jd, iptr, src, d);
}
else {
s1 = emit_load(jd, iptr, src, REG_IFTMP);
- d = codegen_reg_of_var(iptr->opc, dst, s1);
+ d = codegen_reg_of_var(iptr->opc, dst, s1);
}
if (s1 != d) {
*******************************************************************************/
-void emit_verbosecall_enter (jitdata *jd)
+#if !defined(NDEBUG)
+void emit_verbosecall_enter(jitdata *jd)
{
methodinfo *m;
codegendata *cd;
- registerdata *rd;
- s4 s1, p, t;
- int stack_size;
- methoddesc *md;
+ methoddesc *md;
+ int32_t paramcount;
+ int32_t stackframesize;
+ s4 disp;
+ s4 i, s;
/* get required compiler data */
m = jd->m;
cd = jd->cd;
- rd = jd->rd;
md = m->parseddesc;
- /* Build up Stackframe for builtin_trace_args call (a multiple of 16) */
- /* For Darwin: */
- /* TODO */
- /* For Linux: */
- /* setup stack for TRACE_ARGS_NUM registers */
- /* == LA_SIZE + PA_SIZE + 8 (methodinfo argument) + TRACE_ARGS_NUM*8 + 8 (itmp1) */
-
- /* in nativestubs no Place to save the LR (Link Register) would be needed */
- /* but since the stack frame has to be aligned the 4 Bytes would have to */
- /* be padded again */
-
-#if defined(__DARWIN__)
- stack_size = LA_SIZE + (TRACE_ARGS_NUM + 1) * 8;
-#else
- stack_size = LA_SIZE + PA_SIZE + 8 + TRACE_ARGS_NUM * 8 + 8;
-#endif
-
/* mark trace code */
+
M_NOP;
+ /* align stack to 16-bytes */
+
+ paramcount = md->paramcount;
+ ALIGN_2(paramcount);
+ stackframesize = LA_SIZE + PA_SIZE + md->paramcount * 8;
+
M_MFLR(REG_ZERO);
M_AST(REG_ZERO, REG_SP, LA_LR_OFFSET);
- M_STDU(REG_SP, REG_SP, -stack_size);
-
- for (p = 0; p < md->paramcount && p < TRACE_ARGS_NUM; p++) {
- t = md->paramtypes[p].type;
- if (IS_INT_LNG_TYPE(t)) {
- if (!md->params[p].inmemory) { /* Param in Arg Reg */
- M_LST(md->params[p].regoff, REG_SP, LA_SIZE + PA_SIZE + 8 + p * 8);
- } else { /* Param on Stack */
- s1 = (md->params[p].regoff + cd->stackframesize) * 8 + stack_size;
- M_LLD(REG_ITMP2, REG_SP, s1);
- M_LST(REG_ITMP2, REG_SP, LA_SIZE + PA_SIZE + 8 + p * 8);
- }
- } else { /* IS_FLT_DBL_TYPE(t) */
- if (!md->params[p].inmemory) { /* in Arg Reg */
- s1 = md->params[p].regoff;
- M_DST(s1, REG_SP, LA_SIZE + PA_SIZE + 8 + p * 8);
- } else { /* on Stack */
- /* this should not happen */
- assert(0);
- }
- }
- }
+ M_STDU(REG_SP, REG_SP, -stackframesize);
#if defined(__DARWIN__)
#warning "emit_verbosecall_enter not implemented"
#else
- /* LINUX */
- /* Set integer and float argument registers for trace_args call */
- /* offset to saved integer argument registers */
- for (p = 0; (p < TRACE_ARGS_NUM) && (p < md->paramcount); p++) {
- t = md->paramtypes[p].type;
- if (IS_INT_LNG_TYPE(t)) {
- M_LLD(abi_registers_integer_argument[p], REG_SP,LA_SIZE + PA_SIZE + 8 + p * 8);
- } else { /* Float/Dbl */
- if (!md->params[p].inmemory) { /* Param in Arg Reg */
- /* use reserved Place on Stack (sp + 5 * 16) to copy */
- /* float/double arg reg to int reg */
- s1 = md->params[p].regoff;
- M_MOV(s1, abi_registers_integer_argument[p]);
- } else {
- assert(0);
+ /* save argument registers */
+
+ for (i = 0; i < md->paramcount; i++) {
+ if (!md->params[i].inmemory) {
+ s = md->params[i].regoff;
+
+ switch (md->paramtypes[i].type) {
+ case TYPE_ADR:
+ case TYPE_INT:
+ case TYPE_LNG:
+ M_LST(s, REG_SP, LA_SIZE+PA_SIZE+i*8);
+ break;
+ case TYPE_FLT:
+ case TYPE_DBL:
+ M_DST(s, REG_SP, LA_SIZE+PA_SIZE+i*8);
+ break;
}
}
}
#endif
- /* put methodinfo pointer on Stackframe */
- p = dseg_add_address(cd, m);
- M_ALD(REG_ITMP1, REG_PV, p);
-#if defined(__DARWIN__)
- M_AST(REG_ITMP1, REG_SP, LA_SIZE + TRACE_ARGS_NUM * 8);
-#else
- if (TRACE_ARGS_NUM == 8) {
- /* need to pass via stack */
- M_AST(REG_ITMP1, REG_SP, LA_SIZE + PA_SIZE);
- } else {
- /* pass via register, reg 3 is the first */
- M_MOV(REG_ITMP1, 3 + TRACE_ARGS_NUM);
- }
-#endif
- /* call via function descriptor */
- /* XXX: what about TOC? */
- p = dseg_add_functionptr(cd, builtin_verbosecall_enter);
- M_ALD(REG_ITMP2, REG_PV, p);
+ disp = dseg_add_address(cd, m);
+ M_ALD(REG_A0, REG_PV, disp);
+ M_AADD_IMM(REG_SP, LA_SIZE+PA_SIZE, REG_A1);
+ M_AADD_IMM(REG_SP, stackframesize + cd->stackframesize * 8, REG_A2);
+ /* call via function descriptor, XXX: what about TOC? */
+ disp = dseg_add_functionptr(cd, trace_java_call_enter);
+ M_ALD(REG_ITMP2, REG_PV, disp);
M_ALD(REG_ITMP1, REG_ITMP2, 0);
M_MTCTR(REG_ITMP1);
M_JSR;
#if defined(__DARWIN__)
#warning "emit_verbosecall_enter not implemented"
#else
- /* LINUX */
- for (p = 0; p < md->paramcount && p < TRACE_ARGS_NUM; p++) {
- t = md->paramtypes[p].type;
- if (IS_INT_LNG_TYPE(t)) {
- if (!md->params[p].inmemory) { /* Param in Arg Reg */
- /* restore integer argument registers */
- M_LLD(abi_registers_integer_argument[p], REG_SP, LA_SIZE + PA_SIZE + 8 + p * 8);
- } else {
- assert(0); /* TODO: implement this */
- }
- } else { /* FLT/DBL */
- if (!md->params[p].inmemory) { /* Param in Arg Reg */
- M_DLD(md->params[p].regoff, REG_SP, LA_SIZE + PA_SIZE + 8 + p * 8);
- } else {
- assert(0); /* this shoudl never happen */
+ /* restore argument registers */
+
+ for (i = 0; i < md->paramcount; i++) {
+ if (!md->params[i].inmemory) {
+ s = md->params[i].regoff;
+
+ switch (md->paramtypes[i].type) {
+ case TYPE_ADR:
+ case TYPE_INT:
+ case TYPE_LNG:
+ M_LLD(s, REG_SP, LA_SIZE+PA_SIZE+i*8);
+ break;
+ case TYPE_FLT:
+ case TYPE_DBL:
+ M_DLD(s, REG_SP, LA_SIZE+PA_SIZE+i*8);
+ break;
}
-
}
}
#endif
- M_ALD(REG_ZERO, REG_SP, stack_size + LA_LR_OFFSET);
+
+ M_ALD(REG_ZERO, REG_SP, stackframesize + LA_LR_OFFSET);
M_MTLR(REG_ZERO);
- M_LDA(REG_SP, REG_SP, stack_size);
+ M_LDA(REG_SP, REG_SP, stackframesize);
/* mark trace code */
+
M_NOP;
}
+#endif
/* emit_verbosecall_exit ******************************************************
Generates the code for the call trace.
- void builtin_verbosecall_exit(s8 l, double d, float f, methodinfo *m);
-
*******************************************************************************/
+#if !defined(NDEBUG)
void emit_verbosecall_exit(jitdata *jd)
{
methodinfo *m;
codegendata *cd;
+ methoddesc *md;
s4 disp;
/* get required compiler data */
m = jd->m;
cd = jd->cd;
+ md = m->parseddesc;
+
/* mark trace code */
M_NOP;
M_MFLR(REG_ZERO);
M_LDA(REG_SP, REG_SP, -(LA_SIZE+PA_SIZE+10*8));
- M_DST(REG_FRESULT, REG_SP, LA_SIZE+PA_SIZE+0*8);
- M_LST(REG_RESULT, REG_SP, LA_SIZE+PA_SIZE+1*8);
- M_AST(REG_ZERO, REG_SP, LA_SIZE+PA_SIZE+2*8);
-
- M_MOV(REG_RESULT, REG_A0);
-
- M_FLTMOVE(REG_FRESULT, REG_FA0);
- M_FLTMOVE(REG_FRESULT, REG_FA1);
+ M_AST(REG_ZERO, REG_SP, LA_SIZE+PA_SIZE+1*8);
+
+ /* save return value */
+
+ switch (md->returntype.type) {
+ case TYPE_ADR:
+ case TYPE_INT:
+ case TYPE_LNG:
+ M_LST(REG_RESULT, REG_SP, LA_SIZE+PA_SIZE+0*8);
+ break;
+ case TYPE_FLT:
+ case TYPE_DBL:
+ M_DST(REG_FRESULT, REG_SP, LA_SIZE+PA_SIZE+0*8);
+ break;
+ }
disp = dseg_add_address(cd, m);
- M_ALD(REG_A3, REG_PV, disp);
+ M_ALD(REG_A0, REG_PV, disp);
+ M_AADD_IMM(REG_SP, LA_SIZE+PA_SIZE, REG_A1);
- disp = dseg_add_functionptr(cd, builtin_verbosecall_exit);
+ disp = dseg_add_functionptr(cd, trace_java_call_exit);
/* call via function descriptor, XXX: what about TOC ? */
M_ALD(REG_ITMP2, REG_PV, disp);
M_ALD(REG_ITMP2, REG_ITMP2, 0);
M_MTCTR(REG_ITMP2);
M_JSR;
- M_DLD(REG_FRESULT, REG_SP, LA_SIZE+PA_SIZE+0*8);
- M_LLD(REG_RESULT, REG_SP, LA_SIZE+PA_SIZE+1*8);
- M_ALD(REG_ZERO, REG_SP, LA_SIZE+PA_SIZE+2*8);
+ /* restore return value */
+
+ switch (md->returntype.type) {
+ case TYPE_ADR:
+ case TYPE_INT:
+ case TYPE_LNG:
+ M_LLD(REG_RESULT, REG_SP, LA_SIZE+PA_SIZE+0*8);
+ break;
+ case TYPE_FLT:
+ case TYPE_DBL:
+ M_DLD(REG_FRESULT, REG_SP, LA_SIZE+PA_SIZE+0*8);
+ break;
+ }
+
+ M_ALD(REG_ZERO, REG_SP, LA_SIZE+PA_SIZE+1*8);
M_LDA(REG_SP, REG_SP, LA_SIZE+PA_SIZE+10*8);
M_MTLR(REG_ZERO);
M_NOP;
}
+#endif
+
/* emit_branch *****************************************************************
/* if the long-branches flag isn't set yet, do it */
if (!CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
- log_println("setting error");
cd->flags |= (CODEGENDATA_FLAG_ERROR |
CODEGENDATA_FLAG_LONGBRANCHES);
}
/* if the long-branches flag isn't set yet, do it */
if (!CODEGENDATA_HAS_FLAG_LONGBRANCHES(cd)) {
- log_println("setting error");
cd->flags |= (CODEGENDATA_FLAG_ERROR |
CODEGENDATA_FLAG_LONGBRANCHES);
}
- log_println("generating long-branch");
branchdisp --; /* we jump from the second instruction */
switch (condition) {
void emit_arrayindexoutofbounds_check(codegendata *cd, instruction *iptr, s4 s1, s4 s2)
{
if (checkbounds) {
-#define SOFTEX 0
-#if SOFTEX
- M_ILD(REG_ITMP3, s1, OFFSET(java_arrayheader, size));
- M_CMPU(s2, REG_ITMP3);
- codegen_add_arrayindexoutofboundsexception_ref(cd, s2);
- BRANCH_NOPS;
-#else
- M_ILD(REG_ITMP3, s1, OFFSET(java_arrayheader, size));
+ M_ILD(REG_ITMP3, s1, OFFSET(java_array_t, size));
M_CMPU(s2, REG_ITMP3);
M_BLT(1);
/* ALD is 4 byte aligned, ILD 2, onyl LWZ is byte aligned */
- M_LWZ(s2, REG_ZERO, EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS);
-#endif
+ M_LWZ(s2, REG_ZERO, TRAP_ArrayIndexOutOfBoundsException);
}
}
-/* emit_arithmetic_check *******************************************************
+/* emit_arraystore_check *******************************************************
- Emit an ArithmeticException check.
+ Emit an ArrayStoreException check.
*******************************************************************************/
-void emit_arithmetic_check(codegendata *cd, instruction *iptr, s4 reg)
+void emit_arraystore_check(codegendata *cd, instruction *iptr)
{
if (INSTRUCTION_MUST_CHECK(iptr)) {
- #if SOFTEX
- M_TST(reg);
- codegen_add_arithmeticexception_ref(cd);
- BRANCH_NOPS;
- #else
- M_TST(reg);
+ M_TST(REG_RESULT);
M_BNE(1);
/* ALD is 4 byte aligned, ILD 2, onyl LWZ is byte aligned */
- M_LWZ(REG_ZERO, REG_ZERO, EXCEPTION_HARDWARE_ARITHMETIC);
- #endif
+ M_LWZ(REG_ZERO, REG_ZERO, TRAP_ArrayStoreException);
}
}
-#if 0
-/* emit_arraystore_check *******************************************************
- Emit an ArrayStoreException check.
+/* emit_arithmetic_check *******************************************************
+
+ Emit an ArithmeticException check.
*******************************************************************************/
-void emit_arraystore_check(codegendata *cd, instruction *iptr, s4 reg)
+void emit_arithmetic_check(codegendata *cd, instruction *iptr, s4 reg)
{
if (INSTRUCTION_MUST_CHECK(iptr)) {
- M_TST(REG_RESULT);
- codegen_add_arraystoreexception_ref(cd);
- BRANCH_NOPS;
+ M_TST(reg);
+ M_BNE(1);
+ /* ALD is 4 byte aligned, ILD 2, onyl LWZ is byte aligned */
+ M_LWZ(REG_ZERO, REG_ZERO, TRAP_ArithmeticException);
}
}
-#endif
+
/* emit_classcast_check ********************************************************
void emit_classcast_check(codegendata *cd, instruction *iptr, s4 condition, s4 reg, s4 s1)
{
if (INSTRUCTION_MUST_CHECK(iptr)) {
- #if SOFTEX
- codegen_add_classcastexception_ref(cd, condition, s1);
- BRANCH_NOPS;
- M_NOP;
- #else
switch(condition) {
- case BRANCH_LE:
- M_BGT(1);
- break;
- case BRANCH_EQ:
- M_BNE(1);
- break;
- case BRANCH_GT:
- M_BLE(1);
- break;
- default:
- vm_abort("emit_classcast_check: unknown condition %d", condition);
+ case BRANCH_LE:
+ M_BGT(1);
+ break;
+ case BRANCH_EQ:
+ M_BNE(1);
+ break;
+ case BRANCH_GT:
+ M_BLE(1);
+ break;
+ default:
+ vm_abort("emit_classcast_check: unknown condition %d", condition);
}
+
/* ALD is 4 byte aligned, ILD 2, onyl LWZ is byte aligned */
- M_LWZ(s1, REG_ZERO, EXCEPTION_HARDWARE_CLASSCAST);
- #endif
+ M_LWZ(s1, REG_ZERO, TRAP_ClassCastException);
}
}
M_TST(reg);
M_BNE(1);
/* ALD is 4 byte aligned, ILD 2, onyl LWZ is byte aligned */
- M_LWZ(REG_ZERO, REG_ZERO, EXCEPTION_HARDWARE_NULLPOINTER);
+ M_LWZ(REG_ZERO, REG_ZERO, TRAP_NullPointerException);
}
}
void emit_exception_check(codegendata *cd, instruction *iptr)
{
if (INSTRUCTION_MUST_CHECK(iptr)) {
- #if SOFTEX
- M_CMPI(REG_RESULT, 0);
- codegen_add_fillinstacktrace_ref(cd);
- BRANCH_NOPS;
- #else
M_TST(REG_RESULT);
M_BNE(1);
/* ALD is 4 byte aligned, ILD 2, onyl LWZ is byte aligned */
- M_LWZ(REG_ZERO, REG_ZERO, EXCEPTION_HARDWARE_EXCEPTION);
- #endif
+ M_LWZ(REG_ZERO, REG_ZERO, TRAP_CHECK_EXCEPTION);
}
}
-/* emit_patcher_stubs **********************************************************
+/* emit_trap_compiler **********************************************************
- Generates the code for the patcher stubs.
+ Emit a trap instruction which calls the JIT compiler.
*******************************************************************************/
-void emit_patcher_stubs(jitdata *jd)
-{
- codegendata *cd;
- patchref *pref;
- u4 mcode;
- u1 *savedmcodeptr;
- u1 *tmpmcodeptr;
- s4 targetdisp;
- s4 disp;
-
- cd = jd->cd;
-
- /* generate code patching stub call code */
-
- targetdisp = 0;
- for (pref = cd->patchrefs; pref != NULL; pref = pref->next) {
- /* check code segment size */
-
- MCODECHECK(16);
-
- /* Get machine code which is patched back in later. The
- call is 1 instruction word long. */
-
- tmpmcodeptr = (u1 *) (cd->mcodebase + pref->branchpos);
-
- mcode = *((u4 *) tmpmcodeptr);
-
- /* Patch in the call to call the following code (done at
- compile time). */
-
- savedmcodeptr = cd->mcodeptr; /* save current mcodeptr */
- cd->mcodeptr = tmpmcodeptr; /* set mcodeptr to patch position */
-
- disp = ((u4 *) savedmcodeptr) - (((u4 *) tmpmcodeptr) + 1);
- M_BR(disp);
-
- cd->mcodeptr = savedmcodeptr; /* restore the current mcodeptr */
-
- /* create stack frame - keep stack 16-byte aligned */
- M_AADD_IMM(REG_SP, -8 * 8, REG_SP);
-
- /* calculate return address and move it onto the stack */
- M_LDA(REG_ITMP3, REG_PV, pref->branchpos);
- M_AST_INTERN(REG_ITMP3, REG_SP, 5 * 8);
-
- /* move pointer to java_objectheader onto stack */
-
-#if defined(ENABLE_THREADS)
- /* order reversed because of data segment layout */
-
- (void) dseg_add_unique_address(cd, NULL); /* flcword */
- (void) dseg_add_unique_address(cd, lock_get_initial_lock_word()); /* monitorPtr */
- disp = dseg_add_unique_address(cd, NULL); /* vftbl */
-
- M_LDA(REG_ITMP3, REG_PV, disp);
- M_AST_INTERN(REG_ITMP3, REG_SP, 4 * 8);
-#else
- /* do nothing */
-#endif
-
- /* move machine code onto stack */
- disp = dseg_add_s4(cd, mcode);
- M_ILD(REG_ITMP3, REG_PV, disp);
- M_IST_INTERN(REG_ITMP3, REG_SP, 3 * 8);
-
- /* move class/method/field reference onto stack */
- disp = dseg_add_address(cd, pref->ref);
- M_ALD(REG_ITMP3, REG_PV, disp);
- M_AST_INTERN(REG_ITMP3, REG_SP, 2 * 8);
-
- /* move data segment displacement onto stack */
- disp = dseg_add_s4(cd, pref->disp);
- M_ILD(REG_ITMP3, REG_PV, disp);
- M_IST_INTERN(REG_ITMP3, REG_SP, 1 * 8);
-
- /* move patcher function pointer onto stack */
- disp = dseg_add_functionptr(cd, pref->patcher);
- M_ALD(REG_ITMP3, REG_PV, disp);
- M_AST_INTERN(REG_ITMP3, REG_SP, 0 * 8);
-
- if (targetdisp == 0) {
- targetdisp = ((u4 *) cd->mcodeptr) - ((u4 *) cd->mcodebase);
-
- disp = dseg_add_functionptr(cd, asm_patcher_wrapper);
- M_ALD(REG_ITMP3, REG_PV, disp);
- M_MTCTR(REG_ITMP3);
- M_RTS;
- }
- else {
- disp = (((u4 *) cd->mcodebase) + targetdisp) -
- (((u4 *) cd->mcodeptr) + 1);
- M_BR(disp);
- }
- }
+void emit_trap_compiler(codegendata *cd)
+{
+ M_LWZ(REG_METHODPTR, REG_ZERO, TRAP_COMPILER);
}
-/* emit_replacement_stubs ******************************************************
+/* emit_trap *******************************************************************
- Generates the code for the replacement stubs.
+ Emit a trap instruction and return the original machine code.
*******************************************************************************/
-#if defined(ENABLE_REPLACEMENT)
-void emit_replacement_stubs(jitdata *jd)
+uint32_t emit_trap(codegendata *cd)
{
- codegendata *cd;
- codeinfo *code;
- rplpoint *replacementpoint;
- s4 disp;
- s4 i;
-#if !defined(NDEBUG)
- u1 *savedmcodeptr;
-#endif
-
- /* get required compiler data */
-
- cd = jd->cd;
- code = jd->code;
-
- replacementpoint = jd->code->rplpoints;
-
- for (i = 0; i < code->rplpointcount; ++i, ++replacementpoint) {
- /* do not generate stubs for non-trappable points */
-
- if (replacementpoint->flags & RPLPOINT_FLAG_NOTRAP)
- continue;
-
-
- /* check code segment size */
-
- MCODECHECK(100);
-
-#if !defined(NDEBUG)
- savedmcodeptr = cd->mcodeptr;
-#endif
- /* create stack frame - keep 16-byte aligned */
+ uint32_t mcode;
- M_AADD_IMM(REG_SP, -4 * 8, REG_SP);
+ /* Get machine code which is patched back in later. The
+ trap is 1 instruction word long. */
- /* push address of `rplpoint` struct */
+ mcode = *((uint32_t *) cd->mcodeptr);
- disp = dseg_add_address(cd, replacementpoint);
- M_ALD(REG_ITMP3, REG_PV, disp);
- M_AST_INTERN(REG_ITMP3, REG_SP, 0 * 8);
+ /* ALD is 4 byte aligned, ILD 2, only LWZ is byte aligned */
+ M_LWZ(REG_ZERO, REG_ZERO, TRAP_PATCHER);
- /* jump to replacement function */
-
- disp = dseg_add_functionptr(cd, asm_replacement_out);
- M_ALD(REG_ITMP3, REG_PV, disp);
- M_MTCTR(REG_ITMP3);
- M_RTS;
-
- assert((cd->mcodeptr - savedmcodeptr) == 4*REPLACEMENT_STUB_SIZE);
-
-#if 0
- /* note start of stub code */
-
- replacementpoint->outcode = (u1 *) (cd->mcodeptr - cd->mcodebase);
-
- /* make machine code for patching */
-
- savedmcodeptr = cd->mcodeptr;
- cd->mcodeptr = (u1 *) &(replacementpoint->mcode) + 1 /* big-endian */;
-
- disp = (ptrint)((s4*)replacementpoint->outcode - (s4*)replacementpoint->pc) - 1;
- M_BR(disp);
-
- cd->mcodeptr = savedmcodeptr;
-
- /* create stack frame - keep 16-byte aligned */
-
- M_AADD_IMM(REG_SP, -4 * 4, REG_SP);
-
- /* push address of `rplpoint` struct */
-
- disp = dseg_add_unique_address(cd, replacementpoint);
- M_ALD(REG_ITMP3, REG_PV, disp);
- M_AST_INTERN(REG_ITMP3, REG_SP, 0 * 4);
-
- /* jump to replacement function */
-
- disp = dseg_add_functionptr(cd, asm_replacement_out);
- M_ALD(REG_ITMP3, REG_PV, disp);
- M_MTCTR(REG_ITMP3);
- M_RTS;
-#endif
- }
+ return mcode;
}
-#endif /* define(ENABLE_REPLACEMENT) */
+
/*
-* These are local overrides for various environment variables in Emacs.
-* Please do not remove this and leave it at the end of the file, where
-* Emacs will automagically detect them.
-* ---------------------------------------------------------------------
-* Local variables:
-* mode: c
-* indent-tabs-mode: t
-* c-basic-offset: 4
-* tab-width: 4
-* End:
-* vim:noexpandtab:sw=4:ts=4:
-*/
+ * These are local overrides for various environment variables in Emacs.
+ * Please do not remove this and leave it at the end of the file, where
+ * Emacs will automagically detect them.
+ * ---------------------------------------------------------------------
+ * Local variables:
+ * mode: c
+ * indent-tabs-mode: t
+ * c-basic-offset: 4
+ * tab-width: 4
+ * End:
+ * vim:noexpandtab:sw=4:ts=4:
+ */
projects / cacao.git / blobdiff