Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: emit.c 4398 2006-01-31 23:43:08Z twisti $
-
*/
#include "config.h"
#include <assert.h>
+#include <stdint.h>
#include "vm/types.h"
#include "vm/jit/asmpart.h"
#include "vm/jit/emit-common.h"
#include "vm/jit/jit.h"
+#include "vm/jit/patcher-common.h"
#include "vm/jit/replace.h"
#include "toolbox/logging.h" /* XXX for debugging only */
if (src->flags & INMEMORY) {
COUNT_SPILLS;
- disp = src->vv.regoff * 4;
+ disp = src->vv.regoff;
#if defined(ENABLE_SOFTFLOAT)
switch (src->type) {
if (src->flags & INMEMORY) {
COUNT_SPILLS;
- disp = src->vv.regoff * 4;
+ disp = src->vv.regoff;
#if defined(__ARMEL__)
M_ILD(tempreg, REG_SP, disp);
if (src->flags & INMEMORY) {
COUNT_SPILLS;
- disp = src->vv.regoff * 4;
+ disp = src->vv.regoff;
#if defined(__ARMEL__)
M_ILD(tempreg, REG_SP, disp + 4);
if (dst->flags & INMEMORY) {
COUNT_SPILLS;
- disp = dst->vv.regoff * 4;
+ disp = dst->vv.regoff;
#if defined(ENABLE_SOFTFLOAT)
switch (dst->type) {
default:
vm_abort("emit_store: unknown type %d", dst->type);
}
-#endif
- }
- else if (IS_LNG_TYPE(dst->type)) {
-#if defined(__ARMEL__)
- assert(GET_HIGH_REG(dst->vv.regoff) != REG_SPLIT);
-#else
- assert(GET_LOW_REG(dst->vv.regoff) != REG_SPLIT);
#endif
}
}
void emit_arrayindexoutofbounds_check(codegendata *cd, instruction *iptr, s4 s1, s4 s2)
{
if (INSTRUCTION_MUST_CHECK(iptr)) {
- M_ILD_INTERN(REG_ITMP3, s1, OFFSET(java_arrayheader, size));
+ M_ILD_INTERN(REG_ITMP3, s1, OFFSET(java_array_t, size));
M_CMP(s2, REG_ITMP3);
M_TRAPHS(s2, EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS);
}
}
-/* emit_patcher_stubs **********************************************************
+/* emit_trap *******************************************************************
- Generates the code for the patcher stubs.
+ Emit a trap instruction and return the original machine code.
*******************************************************************************/
-void emit_patcher_stubs(jitdata *jd)
+uint32_t emit_trap(codegendata *cd)
{
- codegendata *cd;
- patchref *pref;
- u4 mcode;
- u1 *savedmcodeptr;
- u1 *tmpmcodeptr;
- s4 targetdisp;
- s4 disp;
-
- /* get required compiler data */
-
- cd = jd->cd;
-
- /* generate patcher stub call code */
-
- targetdisp = 0;
-
- for (pref = cd->patchrefs; pref != NULL; pref = pref->next) {
- /* check code segment size */
-
- MCODECHECK(100);
-
- /* 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) + 2);
- M_B(disp);
-
- cd->mcodeptr = savedmcodeptr; /* restore the current mcodeptr */
-
- /* create stack frame (align stack to 8-byte) */
-
- M_SUB_IMM(REG_SP, REG_SP, 8 * 4);
-
- /* save itmp3 onto stack */
-
- M_STR_INTERN(REG_ITMP3, REG_SP, 6 * 4);
-
- /* calculate return address and move it onto stack */
- /* ATTENTION: we can not use BL to branch to patcher stub, */
- /* ATTENTION: because we need to preserve LR for leaf methods */
-
- disp = (s4) (((u4 *) cd->mcodeptr) - (((u4 *) tmpmcodeptr) + 1) + 2);
-
- M_SUB_IMM_EXT_MUL4(REG_ITMP3, REG_PC, disp);
- M_STR_INTERN(REG_ITMP3, REG_SP, 4 * 4);
-
- /* move pointer to java_objectheader onto stack */
-
-#if defined(ENABLE_THREADS)
- /* order reversed because of data segment layout */
+ uint32_t mcode;
- (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 */
+ /* Get machine code which is patched back in later. The
+ trap is 1 instruction word long. */
- M_SUB_IMM_EXT_MUL4(REG_ITMP3, REG_PV, -disp / 4);
- M_STR_INTERN(REG_ITMP3, REG_SP, 3 * 4);
-#else
- M_EOR(REG_ITMP3, REG_ITMP3, REG_ITMP3);
- M_STR_INTERN(REG_ITMP3, REG_SP, 3 * 4);
-#endif
-
- /* move machine code onto stack */
-
- disp = dseg_add_unique_s4(cd, mcode);
- M_DSEG_LOAD(REG_ITMP3, disp);
- M_STR_INTERN(REG_ITMP3, REG_SP, 2 * 4);
-
- /* move class/method/field reference onto stack */
-
- disp = dseg_add_unique_address(cd, pref->ref);
- M_DSEG_LOAD(REG_ITMP3, disp);
- M_STR_INTERN(REG_ITMP3, REG_SP, 1 * 4);
-
- /* move data segment displacement onto stack */
-
- disp = dseg_add_unique_s4(cd, pref->disp);
- M_DSEG_LOAD(REG_ITMP3, disp);
- M_STR_INTERN(REG_ITMP3, REG_SP, 5 * 4);
-
- /* move patcher function pointer onto stack */
-
- disp = dseg_add_functionptr(cd, pref->patcher);
- M_DSEG_LOAD(REG_ITMP3, disp);
- M_STR_INTERN(REG_ITMP3, REG_SP, 0 * 4);
-
- /* finally call the patcher via asm_patcher_wrapper */
- /* ATTENTION: don't use REG_PV here, because some patchers need it */
-
- if (targetdisp == 0) {
- targetdisp = ((u4 *) cd->mcodeptr) - ((u4 *) cd->mcodebase);
-
- disp = dseg_add_functionptr(cd, asm_patcher_wrapper);
- /*M_DSEG_BRANCH_NOLINK(REG_PC, REG_PV, a);*/
- /* TODO: this is only a hack */
- M_DSEG_LOAD(REG_ITMP3, disp);
- M_MOV(REG_PC, REG_ITMP3);
- }
- else {
- disp = (((u4 *) cd->mcodebase) + targetdisp) -
- (((u4 *) cd->mcodeptr) + 2);
+ mcode = *((u4 *) cd->mcodeptr);
- M_B(disp);
- }
- }
-}
-
-
-/* emit_replacement_stubs ******************************************************
-
- Generates the code for the replacement stubs.
-
-*******************************************************************************/
+ M_TRAP(0, EXCEPTION_HARDWARE_PATCHER);
-#if defined(ENABLE_REPLACEMENT)
-void emit_replacement_stubs(jitdata *jd)
-{
- codegendata *cd;
- codeinfo *code;
- rplpoint *rplp;
- u1 *savedmcodeptr;
- s4 disp;
- s4 i;
-
- /* get required compiler data */
-
- cd = jd->cd;
- code = jd->code;
+ return mcode;
}
-#endif /* defined(ENABLE_REPLACEMENT) */
/* emit_verbosecall_enter ******************************************************
M_STMFD(BITMASK_ARGS | (1<<REG_LR) | (1<<REG_PV), REG_SP);
M_SUB_IMM(REG_SP, REG_SP, (2 + 2 + 1 + 1) * 4); /* space for a3, a4 and m */
- stackframesize += 6 + 2 + 2 + 1 + 1;
+ stackframesize += (6 + 2 + 2 + 1 + 1) * 4;
/* prepare args for tracer */
M_MOV_IMM(REG_ITMP1, 0);
s1 = PACK_REGS(s1, REG_ITMP1);
}
- else {
- SPLIT_OPEN(t, s1, REG_ITMP1);
- SPLIT_LOAD(t, s1, stackframesize);
- }
}
else {
s1 = REG_ITMP12_PACKED;
s2 = md->params[i].regoff + stackframesize;
if (IS_2_WORD_TYPE(t))
- M_LLD(s1, REG_SP, s2 * 4);
+ M_LLD(s1, REG_SP, s2);
else {
- M_ILD(GET_LOW_REG(s1), REG_SP, s2 * 4);
+ M_ILD(GET_LOW_REG(s1), REG_SP, s2);
M_MOV_IMM(GET_HIGH_REG(s1), 0);
}
}
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