/* src/vm/jit/i386/emit.c - i386 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: emit.c 8115 2007-06-20 19:14:05Z michi $
-
*/
#include "threads/lock-common.h"
-#include "vm/builtin.h"
#include "vm/exceptions.h"
+#include "vm/jit/abi.h"
#include "vm/jit/asmpart.h"
#include "vm/jit/dseg.h"
#include "vm/jit/emit-common.h"
#include "vm/jit/jit.h"
+#include "vm/jit/patcher-common.h"
#include "vm/jit/replace.h"
+#include "vm/jit/trace.h"
+#include "vm/jit/trap.h"
#include "vmcore/options.h"
#include "vmcore/statistics.h"
if (INSTRUCTION_MUST_CHECK(iptr)) {
M_TEST(reg);
M_BNE(6);
- M_ALD_MEM(reg, EXCEPTION_HARDWARE_ARITHMETIC);
+ M_ALD_MEM(reg, TRAP_ArithmeticException);
}
}
void emit_arrayindexoutofbounds_check(codegendata *cd, instruction *iptr, s4 s1, s4 s2)
{
if (INSTRUCTION_MUST_CHECK(iptr)) {
- M_ILD(REG_ITMP3, s1, OFFSET(java_arrayheader, size));
+ M_ILD(REG_ITMP3, s1, OFFSET(java_array_t, size));
M_CMP(REG_ITMP3, s2);
M_BB(6);
- M_ALD_MEM(s2, EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS);
+ M_ALD_MEM(s2, TRAP_ArrayIndexOutOfBoundsException);
+ }
+}
+
+
+/* emit_arraystore_check *******************************************************
+
+ Emit an ArrayStoreException check.
+
+*******************************************************************************/
+
+void emit_arraystore_check(codegendata *cd, instruction *iptr)
+{
+ if (INSTRUCTION_MUST_CHECK(iptr)) {
+ M_TEST(REG_RESULT);
+ M_BNE(6);
+ M_ALD_MEM(REG_RESULT, TRAP_ArrayStoreException);
}
}
default:
vm_abort("emit_classcast_check: unknown condition %d", condition);
}
- M_ALD_MEM(s1, EXCEPTION_HARDWARE_CLASSCAST);
+ M_ALD_MEM(s1, TRAP_ClassCastException);
}
}
if (INSTRUCTION_MUST_CHECK(iptr)) {
M_TEST(reg);
M_BNE(6);
- M_ALD_MEM(reg, EXCEPTION_HARDWARE_NULLPOINTER);
+ M_ALD_MEM(reg, TRAP_NullPointerException);
}
}
if (INSTRUCTION_MUST_CHECK(iptr)) {
M_TEST(REG_RESULT);
M_BNE(6);
- M_ALD_MEM(REG_RESULT, EXCEPTION_HARDWARE_EXCEPTION);
+ M_ALD_MEM(REG_RESULT, 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)
+void emit_trap_compiler(codegendata *cd)
{
- codegendata *cd;
- patchref *pref;
- u8 mcode;
- u1 *savedmcodeptr;
- u1 *tmpmcodeptr;
- s4 targetdisp;
- s4 disp;
-
- /* get required compiler data */
-
- 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(512);
-
- /* Get machine code which is patched back in later. A
- `call rel32' is 5 bytes long. */
-
- savedmcodeptr = cd->mcodebase + pref->branchpos;
- mcode = *((u8 *) savedmcodeptr);
-
- /* patch in `call rel32' to call the following code */
-
- tmpmcodeptr = cd->mcodeptr; /* save current mcodeptr */
- cd->mcodeptr = savedmcodeptr; /* set mcodeptr to patch position */
-
- M_CALL_IMM(tmpmcodeptr - (savedmcodeptr + PATCHER_CALL_SIZE));
-
- cd->mcodeptr = tmpmcodeptr; /* restore the current mcodeptr */
-
- /* save REG_ITMP3 */
-
- M_PUSH(REG_ITMP3);
-
- /* move pointer to java_objectheader onto stack */
-
-#if defined(ENABLE_THREADS)
- (void) dseg_add_unique_address(cd, NULL); /* flcword */
- (void) dseg_add_unique_address(cd, lock_get_initial_lock_word());
- disp = dseg_add_unique_address(cd, NULL); /* vftbl */
-
- M_MOV_IMM(0, REG_ITMP3);
- dseg_adddata(cd);
- M_AADD_IMM(disp, REG_ITMP3);
- M_PUSH(REG_ITMP3);
-#else
- M_PUSH_IMM(0);
-#endif
-
- /* move machine code bytes and classinfo pointer into registers */
-
- M_PUSH_IMM(mcode >> 32);
- M_PUSH_IMM(mcode);
- M_PUSH_IMM(pref->ref);
- M_PUSH_IMM(pref->patcher);
-
- if (targetdisp == 0) {
- targetdisp = cd->mcodeptr - cd->mcodebase;
-
- M_MOV_IMM(asm_patcher_wrapper, REG_ITMP3);
- M_JMP(REG_ITMP3);
- }
- else {
- M_JMP_IMM((cd->mcodebase + targetdisp) -
- (cd->mcodeptr + PATCHER_CALL_SIZE));
- }
- }
+ M_ALD_MEM(REG_METHODPTR, TRAP_COMPILER);
}
+/* emit_trap_countdown *********************************************************
-/* emit_replacement_stubs ******************************************************
+ Emit a countdown trap.
- Generates the code for the replacement stubs.
+ counter....absolute address of the counter variable
*******************************************************************************/
-#if defined(ENABLE_REPLACEMENT)
-void emit_replacement_stubs(jitdata *jd)
+void emit_trap_countdown(codegendata *cd, s4 *counter)
{
- codegendata *cd;
- codeinfo *code;
- rplpoint *rplp;
- s4 i;
- s4 branchmpc;
- s4 outcode;
-
- /* get required compiler data */
-
- cd = jd->cd;
- code = jd->code;
-
- rplp = code->rplpoints;
-
- /* store beginning of replacement stubs */
-
- code->replacementstubs = (u1*) (cd->mcodeptr - cd->mcodebase);
-
- for (i = 0; i < code->rplpointcount; ++i, ++rplp) {
- /* do not generate stubs for non-trappable points */
-
- if (rplp->flags & RPLPOINT_FLAG_NOTRAP)
- continue;
-
- /* check code segment size */
-
- MCODECHECK(512);
-
- /* note start of stub code */
-
- outcode = (s4) (cd->mcodeptr - cd->mcodebase);
+ M_ISUB_IMM_MEMABS(1, (s4) counter);
+ M_BNS(6);
+ M_ALD_MEM(REG_METHODPTR, TRAP_COUNTDOWN);
+}
- /* push address of `rplpoint` struct */
-
- M_PUSH_IMM(rplp);
+/* emit_trap *******************************************************************
- /* jump to replacement function */
+ Emit a trap instruction and return the original machine code.
- M_PUSH_IMM(asm_replacement_out);
- M_RET;
+*******************************************************************************/
- /* add jump reference for COUNTDOWN points */
+uint32_t emit_trap(codegendata *cd)
+{
+ uint16_t mcode;
- if (rplp->flags & RPLPOINT_FLAG_COUNTDOWN) {
+ /* Get machine code which is patched back in later. The
+ trap is 2 bytes long. */
- branchmpc = (s4)rplp->pc + (7 + 6);
+ mcode = *((uint16_t *) cd->mcodeptr);
- md_codegen_patch_branch(cd, branchmpc, (s4) outcode);
- }
+#if 0
+ /* XXX this breaks GDB, so we disable it for now */
+ *(cd->mcodeptr++) = 0xcc;
+ M_INT3;
+#else
+ M_UD2;
+#endif
- assert(((cd->mcodeptr - cd->mcodebase) - outcode) == REPLACEMENT_STUB_SIZE);
- }
+ return (uint32_t) mcode;
}
-#endif /* defined(ENABLE_REPLACEMENT) */
-
+
/* emit_verbosecall_enter ******************************************************
void emit_verbosecall_enter(jitdata *jd)
{
methodinfo *m;
+ codeinfo *code;
codegendata *cd;
registerdata *rd;
methoddesc *md;
- s4 disp;
- s4 i, t;
+ int32_t stackframesize;
+ int i;
+ int align_off; /* offset for alignment compensation */
if (!JITDATA_HAS_FLAG_VERBOSECALL(jd))
return;
/* get required compiler data */
- m = jd->m;
- cd = jd->cd;
- rd = jd->rd;
+ m = jd->m;
+ code = jd->code;
+ cd = jd->cd;
+ rd = jd->rd;
md = m->parseddesc;
M_NOP;
- /* methodinfo* + arguments + return address */
+ /* keep stack 16-byte aligned */
- disp = TRACE_ARGS_NUM * 8 + 4 + INT_TMP_CNT * 4 +
- cd->stackframesize * 4 + 4;
+ stackframesize = 2 + TMP_CNT;
+ ALIGN_2(stackframesize);
- M_ASUB_IMM(TRACE_ARGS_NUM * 8 + 4 + INT_TMP_CNT * 4, REG_SP);
+ M_ASUB_IMM(stackframesize * 8, REG_SP);
/* save temporary registers for leaf methods */
- for (i = 0; i < INT_TMP_CNT; i++)
- M_IST(rd->tmpintregs[i], REG_SP, TRACE_ARGS_NUM * 8 + 4 + i * 4);
-
- for (i = 0; i < md->paramcount && i < TRACE_ARGS_NUM; i++) {
- t = md->paramtypes[i].type;
-
- if (IS_INT_LNG_TYPE(t)) {
- if (IS_2_WORD_TYPE(t)) {
- M_LLD(REG_ITMP12_PACKED, REG_SP, disp);
- M_LST(REG_ITMP12_PACKED, REG_SP, i * 8);
- }
- else if (IS_ADR_TYPE(t)) {
- M_ALD(REG_ITMP1, REG_SP, disp);
- M_AST(REG_ITMP1, REG_SP, i * 8);
- M_IST_IMM(0, REG_SP, i * 8 + 4);
- }
- else {
- M_ILD(EAX, REG_SP, disp);
- emit_cltd(cd);
- M_LST(EAX_EDX_PACKED, REG_SP, i * 8);
- }
- }
- else {
- if (IS_2_WORD_TYPE(t)) {
- M_DLD(REG_NULL, REG_SP, disp);
- M_DST(REG_NULL, REG_SP, i * 8);
- }
- else {
- M_FLD(REG_NULL, REG_SP, disp);
- M_FST(REG_NULL, REG_SP, i * 8);
- M_IST_IMM(0, REG_SP, i * 8 + 4);
- }
- }
-
- disp += (IS_2_WORD_TYPE(t)) ? 8 : 4;
+ if (code_is_leafmethod(code)) {
+ for (i = 0; i < INT_TMP_CNT; i++)
+ M_IST(rd->tmpintregs[i], REG_SP, (2 + i) * 8);
}
-
- M_AST_IMM(m, REG_SP, TRACE_ARGS_NUM * 8);
- M_MOV_IMM(builtin_verbosecall_enter, REG_ITMP1);
+ /* no argument registers to save */
+
+ align_off = cd->stackframesize ? 4 : 0;
+ M_AST_IMM(m, REG_SP, 0 * 4);
+ M_AST_IMM(0, REG_SP, 1 * 4);
+ M_AST(REG_SP, REG_SP, 2 * 4);
+ M_IADD_IMM_MEMBASE(stackframesize * 8 + cd->stackframesize * 8 + 4 + align_off, REG_SP, 2 * 4);
+ M_MOV_IMM(trace_java_call_enter, REG_ITMP1);
M_CALL(REG_ITMP1);
+ /* no argument registers to restore */
+
/* restore temporary registers for leaf methods */
- for (i = 0; i < INT_TMP_CNT; i++)
- M_ILD(rd->tmpintregs[i], REG_SP, TRACE_ARGS_NUM * 8 + 4 + i * 4);
+ if (code_is_leafmethod(code)) {
+ for (i = 0; i < INT_TMP_CNT; i++)
+ M_ILD(rd->tmpintregs[i], REG_SP, (2 + i) * 8);
+ }
- M_AADD_IMM(TRACE_ARGS_NUM * 8 + 4 + INT_TMP_CNT * 4, REG_SP);
+ M_AADD_IMM(stackframesize * 8, REG_SP);
/* mark trace code */
Generates the code for the call trace.
- void builtin_verbosecall_exit(s8 l, double d, float f, methodinfo *m);
-
*******************************************************************************/
#if !defined(NDEBUG)
methodinfo *m;
codegendata *cd;
registerdata *rd;
+ methoddesc *md;
if (!JITDATA_HAS_FLAG_VERBOSECALL(jd))
return;
cd = jd->cd;
rd = jd->rd;
+ md = m->parseddesc;
+
/* mark trace code */
M_NOP;
- M_ASUB_IMM(8 + 8 + 4 + 4 + 8, REG_SP); /* +8: keep stack 16-byte aligned */
-
- M_LST(REG_RESULT_PACKED, REG_SP, 0 * 8);
-
- M_DSTNP(REG_NULL, REG_SP, 1 * 8);
- M_FSTNP(REG_NULL, REG_SP, 2 * 8);
-
- M_AST_IMM(m, REG_SP, 2 * 8 + 1 * 4);
+ /* keep stack 16-byte aligned */
+
+ M_ASUB_IMM(4 + 4 + 8, REG_SP);
+
+ /* save return value */
+
+ switch (md->returntype.type) {
+ case TYPE_ADR:
+ case TYPE_INT:
+ M_IST(REG_RESULT, REG_SP, 2 * 4);
+ break;
+ case TYPE_LNG:
+ M_LST(REG_RESULT_PACKED, REG_SP, 2 * 4);
+ break;
+ case TYPE_FLT:
+ M_FSTNP(REG_NULL, REG_SP, 2 * 4);
+ break;
+ case TYPE_DBL:
+ M_DSTNP(REG_NULL, REG_SP, 2 * 4);
+ break;
+ }
- M_MOV_IMM(builtin_verbosecall_exit, REG_ITMP1);
+ M_AST_IMM(m, REG_SP, 0 * 4);
+ M_AST(REG_SP, REG_SP, 1 * 4);
+ M_IADD_IMM_MEMBASE(2 * 4, REG_SP, 1 * 4);
+ M_MOV_IMM(trace_java_call_exit, REG_ITMP1);
M_CALL(REG_ITMP1);
- M_LLD(REG_RESULT_PACKED, REG_SP, 0 * 4);
+ /* restore return value */
+
+ switch (md->returntype.type) {
+ case TYPE_ADR:
+ case TYPE_INT:
+ M_ILD(REG_RESULT, REG_SP, 2 * 4);
+ break;
+ case TYPE_LNG:
+ M_LLD(REG_RESULT_PACKED, REG_SP, 2 * 4);
+ break;
+ }
- M_AADD_IMM(8 + 8 + 4 + 4 + 8, REG_SP);
+ M_AADD_IMM(4 + 4 + 8, REG_SP);
/* mark trace code */
}
+void emit_movsbl_reg_reg(codegendata *cd, s4 a, s4 b)
+{
+ assert(a < 4); /* Can only operate on al, bl, cl, dl. */
+ *(cd->mcodeptr++) = 0x0f;
+ *(cd->mcodeptr++) = 0xbe;
+ emit_reg((b),(a));
+}
+
+
void emit_movsbl_memindex_reg(codegendata *cd, s4 disp, s4 basereg, s4 indexreg, s4 scale, s4 reg)
{
COUNT(count_mov_mem_reg);
}
+void emit_movzbl_reg_reg(codegendata *cd, s4 a, s4 b)
+{
+ assert(a < 4); /* Can only operate on al, bl, cl, dl. */
+ *(cd->mcodeptr++) = 0x0f;
+ *(cd->mcodeptr++) = 0xb6;
+ emit_reg((b),(a));
+}
+
+
void emit_movzwl_reg_reg(codegendata *cd, s4 a, s4 b)
{
*(cd->mcodeptr++) = 0x0f;
}
-void emit_cltd(codegendata *cd)
-{
- *(cd->mcodeptr++) = 0x99;
-}
-
-
void emit_imul_reg_reg(codegendata *cd, s4 reg, s4 dreg)
{
*(cd->mcodeptr++) = 0x0f;
}
-void emit_ret(codegendata *cd)
-{
- *(cd->mcodeptr++) = 0xc3;
-}
-
-
/*
* shift ops
}
-void emit_nop(codegendata *cd)
-{
- *(cd->mcodeptr++) = 0x90;
-}
-
-
void emit_lock(codegendata *cd)
{
*(cd->mcodeptr++) = 0xf0;
*(cd->mcodeptr++) = 0xf7;
}
+#if defined(ENABLE_ESCAPE_CHECK)
+void emit_escape_check(codegendata *cd, s4 reg) {
+ M_PUSH(reg);
+ M_MOV_IMM(asm_escape_check, REG_ITMP3);
+ M_CALL(REG_ITMP3);
+ M_IADD_IMM(4, REG_SP);
+}
+#endif
/*
* These are local overrides for various environment variables in Emacs.
projects / cacao.git / blobdiff