1 /* src/vm/jit/sparc64/asmpart.S - Java-C interface functions for Sparc64
3 Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
4 C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
5 E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
6 J. Wenninger, Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 $Id: asmpart.S 4749 2006-04-11 10:20:18Z twisti $
32 #include "vm/jit/sparc64/md-abi.h"
36 .register %g2,#scratch /* define as scratch */
37 .register %g3,#scratch /* XXX reserve for application */
40 /* export functions ***********************************************************/
42 .global asm_vm_call_method
43 .global asm_vm_call_method_int
44 .global asm_vm_call_method_long
45 .global asm_vm_call_method_float
46 .global asm_vm_call_method_double
47 .global asm_vm_call_method_exception_handler
48 .global asm_vm_call_method_end
50 .global asm_call_jit_compiler
52 .global asm_handle_exception
53 .global asm_handle_nat_exception
55 .global asm_patcher_wrapper
57 .global asm_abstractmethoderror
59 .global asm_criticalsections
60 .global asm_getclassvalues_atomic
62 .global asm_store_fp_state_reg
63 .global asm_load_fp_state_reg
66 /* asm_vm_call_method ******************************************************
68 * This function calls a Java-method (which possibly needs compilation) *
71 * java_objectheader *asm_vm_call_method(methodinfo *m, s4 vmargscount,
73 **************************************************************************/
75 .align 8 /* v9: All data types are aligned to their size */
77 .xword 0 /* catch type all */
78 .xword 0 /* handler pc */
80 .xword 0 /* start pc */
81 .word 1 /* extable size */
82 .word 0 /* ALIGNMENT PADDING */
83 .xword 0 /* line number table start */
84 .xword 0 /* line number table size */
85 .word 0 /* ALIGNMENT PADDING */
90 .word 0 /* frame size */
91 .xword 0 /* method pointer (pointer to name)*/
94 asm_vm_call_method_int:
95 asm_vm_call_method_long:
96 asm_vm_call_method_float:
97 asm_vm_call_method_double:
99 save %sp,-((JITSTACK_CNT+2)*8),%sp
100 add %sp,JITSTACK,%l1 /* right above window save area */
103 /* %i1 not needed after _nocopy -> calculate in branch delay */
105 brlez %i1, calljava_nocopy
107 dec %i1 /* branch delay */
108 ldx [%i2 + offvmargdata],%o0
109 ldx [%i2 + offvmargtype],%l2
111 be,a %xcc,calljava_arg0isfloat
112 ld [%i2 + offvmargdata],fa0f /* delay: annulled if branch not taken */
113 ldd [%i2 + offvmargdata],fa0
114 calljava_arg0isfloat:
115 brlez %i1,calljava_nocopy
117 dec %i1 /* branch delay */
118 ldx [%i2 + (offvmargdata+sizevmarg*1)],%o1
119 ldx [%i2 + (offvmargtype+sizevmarg*1)],%l2
121 be,a %xcc,calljava_arg1isfloat
122 ld [%i2 + (offvmargdata+sizevmarg*1)],fa1f
123 ldd [%i2 + (offvmargdata+sizevmarg*1)],fa1
124 calljava_arg1isfloat:
125 brlez %i1,calljava_nocopy
128 ldx [%i2 + (offvmargdata+sizevmarg*2)],%o2
129 ldx [%i2 + (offvmargtype+sizevmarg*2)],%l2
131 be,a %xcc,calljava_arg2isfloat
132 ld [%i2 + (offvmargdata+sizevmarg*2)],fa2f
133 ldd [%i2 + (offvmargdata+sizevmarg*2)],fa2
134 calljava_arg2isfloat:
135 brlez %i1,calljava_nocopy
138 ldx [%i2 + (offvmargdata+sizevmarg*3)],%o3
139 ldx [%i2 + (offvmargtype+sizevmarg*3)],%l2
141 be,a %xcc,calljava_arg3isfloat
142 ld [%i2 + (offvmargdata+sizevmarg*3)],fa3f
143 ldd [%i2 + (offvmargdata+sizevmarg*3)],fa3
144 calljava_arg3isfloat:
145 brlez %i1,calljava_nocopy
148 ldx [%i2 + (offvmargdata+sizevmarg*4)],%o4
149 ldx [%i2 + (offvmargtype+sizevmarg*4)],%l2
151 be,a %xcc,calljava_arg4isfloat
152 ld [%i2 + (offvmargdata+sizevmarg*4)],fa4f
153 ldd [%i2 + (offvmargdata+sizevmarg*4)],fa4
154 calljava_arg4isfloat:
157 brlez %i1, calljava_nocopy
159 sllx %i1,3,%l0 /* remaining args * 8 */
160 sub %sp,%l0,%sp /* allocate more stack space */
161 add %sp,JITSTACK,%l1 /* adjust stack begin pointer */
164 ldx [%i2 + (offvmargtype+sizevmarg*5)],%l2
166 be %xcc,calljava_copyloop_float
168 ldx [%i2 + (offvmargdata+sizevmarg*5)],%l0
171 calljava_copyloop_float:
172 ld [%i2 + (offvmargdata+sizevmarg*5)],%f1
175 inc sizevmarg,%i2 /* src++ */
176 subcc %i1,1,%i1 /* arg_count-- */
177 bnz %xcc, calljava_copyloop /* use cc from previous instr */
178 inc 8,%l1 /* dst++ (delay) */
182 /* set pv, like a java method does */
183 /* add ra_caller,(asm_vm_call_method - calljava_nocopy + 8),pv_callee */
184 setx asm_vm_call_method,%l0,pv_callee
186 mov %i0,itmp1 /* pass method info pointer via itmp1 */
188 setx asm_call_jit_compiler,%l0,mptr_itmp2 /* fake virtual function call (2 instr) */
189 stx mptr_itmp2,[%l1 + 1*8] /* store function address */
190 mov %l1,mptr_itmp2 /* set method pointer */
192 ldx [1*8 + mptr_itmp2], pv_caller /* method call as in Java */
193 jmpl pv_caller,ra_caller /* call JIT compiler */
196 /* pretend to restore pv */
197 add ra_caller,(asm_vm_call_method - calljava_jit2 + 8),zero
200 mov %o0, %i0 /* pass on the return value */
201 return %i7 + 8 /* implicit window restore */
205 asm_vm_call_method_exception_handler:
207 /* so far this function did not call any c functions */
208 /* but now we need ABI compliant argslots on the stack */
212 call builtin_throw_exception
214 return %i7 + 8 /* implicit window restore */
215 asm_vm_call_method_end:
220 /****************** function asm_call_jit_compiler *****************************
222 * invokes the compiler for untranslated JavaVM methods. *
224 * Register R0 contains a pointer to the method info structure (prepared *
225 * by createcompilerstub). Using the return address in R26 and the *
226 * offset in the LDA instruction or using the value in methodptr R28 the *
227 * patching address for storing the method address can be computed: *
229 * method address was either loaded using *
230 * M_LDQ (REG_PV, REG_PV, a) ; invokestatic/special ($27) *
231 * M_LDA (REG_PV, REG_RA, low) *
232 * M_LDAH(REG_PV, REG_RA, high) ; optional *
234 * M_LDQ (REG_PV, REG_METHODPTR, m) ; invokevirtual/interface ($28) *
235 * in the static case the method pointer can be computed using the *
236 * return address and the lda function following the jmp instruction *
238 *******************************************************************************/
240 asm_call_jit_compiler:
242 /* stacksave for regsave(16) + argslots(6) + float args */
243 /* Note: +1 to keep stack 16-byte aligned */
244 save %sp,-((16+6+FLT_ARG_CNT+1)*8),%sp
246 SAVE_FLOAT_ARGUMENT_REGISTERS(22)
248 mov itmp1,%o0 /* pass methodinfo pointer */
249 mov mptr_itmp2,%o1 /* pass method pointer */
250 mov %fp,%o2 /* pass java sp (==fp) */
251 mov ra_callee,%o3 /* pass Java ra */
252 mov %o3,%o4 /* xpc is equal to ra */
253 call jit_asm_compile /* call jit compiler */
256 RESTORE_FLOAT_ARGUMENT_REGISTERS(22)
258 brz %o0,L_asm_call_jit_compiler_exception
261 restore %o0,%g0,pv_caller /* restore the callers window */
262 /* the source o0 references the old window */
263 /* pv_caller references the new window */
266 /* synchronise instruction cache moved somewhere else */
268 jmpl pv_caller,zero /* and call method, the method returns */
269 /* directly to the caller (ra). */
272 L_asm_call_jit_compiler_exception:
273 /* window still open, ra_callee valid, pv_callee undefined */
275 call exceptions_get_and_clear_exception
278 mov %o0,xptr_itmp2 /* get exception */
279 mov ra_callee,xpc_itmp3 /* exception address is address of call */
281 /* restore the window of the calling function */
284 b L_asm_handle_nat_exception
289 /* asm_handle_exception ********************************************************
291 This function handles an exception. It does not use the usual calling
292 conventions. The exception pointer is passed in REG_ITMP2 and the
293 pc from the exception raising position is passed in REG_ITMP3. It searches
294 the local exception table for a handler. If no one is found, it unwinds
295 stacks and continues searching the callers.
297 *******************************************************************************/
300 asm_handle_nat_exception:
301 L_asm_handle_nat_exception: /* required for PIC code */
302 L_asm_handle_exception_stack_loop:
303 /* exception handling assumes that the current java method saved */
304 /* the caller's window, and has a valid pv */
306 /* get ra and pv before saving the window */
311 mov xptr_itmp2,%l0 /* save exception pointer */
312 mov xpc_itmp3,%l1 /* save exception pc */
313 mov zero,%l2 /* save maybe-leaf flag (cleared) */
315 mov %l0,%o0 /* pass xptr */
316 mov %l1,%o1 /* pass xpc */
317 mov %g4,%o2 /* pass PV */
318 mov %fp,%o3 /* pass Java SP */
320 b L_asm_handle_exception_continue
323 asm_handle_exception:
326 /* save bigger stack frame for float args and temps */
327 save %sp,-((FLT_ARG_CNT+FLT_TMP_CNT+CSTACK_CNT)*8),%sp
329 SAVE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
330 SAVE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
332 mov xptr_itmp2,%l0 /* save exception pointer */
333 add zero,1,%l2 /* set maybe-leaf flag */
335 mov %l0,%o0 /* pass xptr */
336 mov xpc_itmp3,%o1 /* pass xpc */
337 mov %g4,%o2 /* pass PV */
338 mov %fp,%o3 /* pass Java SP */
340 L_asm_handle_exception_continue:
341 call exceptions_handle_exception
344 brz %o0,L_asm_handle_exception_not_caught
347 mov %o0,xpc_itmp3 /* move handlerpc into xpc */
348 mov %l0,xptr_itmp2 /* restore exception pointer */
350 brz %l2,L_asm_handle_exception_no_leaf
353 RESTORE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
354 RESTORE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
356 L_asm_handle_exception_no_leaf:
357 /* restore java window and stackframe (ra and pv are in there) */
359 jmpl xpc_itmp3, zero /* jump to the handler */
362 L_asm_handle_exception_not_caught:
363 mov %l0,xptr_itmp2 /* restore xptr */
364 restore /* free our stackframe and window */
365 /* maybe leaf flag gets cleared after branch to _loop */
367 restore /* unwind stack and window */
368 ba L_asm_handle_exception_stack_loop
369 mov ra_caller,xpc_itmp3 /* the new xpc is ra (delay) */
374 /* asm_abstractmethoderror *****************************************************
376 Creates and throws an AbstractMethodError.
378 *******************************************************************************/
380 asm_abstractmethoderror:
381 /* do a window save */
384 mov %fp,%o0 /* pass java sp(==fp) */
385 mov ra_callee,%o1 /* pass exception address */
386 call exceptions_asm_new_abstractmethoderror
389 mov %o0,xptr_itmp2 /* get exception pointer */
390 sub ra_callee,4,xpc_itmp3 /* exception address is ra - 4 */
391 ba L_asm_handle_nat_exception
394 /* XXX: leave the register window open for handle_exception ??? */
396 /* asm_patcher_wrapper *********************************************************
400 Stack layout, when called from patcher stub
401 40 return address into JIT code (patch position)
402 32 pointer to virtual java_objectheader
403 24 machine code (which is patched back later)
404 16 unresolved class/method/field reference
405 8 data segment displacement from load instructions
406 0 patcher function pointer to call
407 -128 WINSAVE REGS (current SP)
409 *******************************************************************************/
413 /* get pv and ra, since the emit code is not passing it on */
414 mov ra_callee,ra_caller
415 mov pv_callee,pv_caller
417 /* create window and stack frame */
418 save %sp,-((FLT_ARG_CNT+FLT_TMP_CNT+CSTACK_CNT+4)*8),%sp
420 SAVE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
421 SAVE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
423 mov itmp1,%l0 /* save itmp1 */
424 mov itmp2,%l1 /* save itmp2 */
426 add %fp,JITSTACK,%o0 /* pass pseudo SP */
427 mov pv_callee,%o1 /* pass PV */
428 mov ra_callee,%o2 /* pass RA (correct for leafs) */
432 RESTORE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
433 RESTORE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
435 mov %l0,itmp1 /* restore itmp1 */
436 mov %l1,itmp2 /* restore itmp2 */
438 brnz %o0,L_asm_patcher_wrapper_exception
441 /* load RA (patch position from patcher data on the stack */
442 ldx [%fp+JITSTACK+5*8],itmp3
444 /* remove window and stack frame (and stack space allocated in the stub code */
445 restore %fp,6*8,%sp /* (source regs refer to old window, rd to new window) */
447 jmpl itmp3,zero /* jump to newly patched code */
450 L_asm_patcher_wrapper_exception:
451 mov %o0,xptr_itmp2 /* get exception */
452 ldx [%fp+JITSTACK+5*8],xpc_itmp3 /* xpc is RA */
453 restore %fp,6*8,%sp /* remove stack frame */
454 ba asm_handle_exception
459 /* asm_store_fp_state_reg **************************************************
461 * This function stores the 64-bit floating point state register to a *
462 * memory location. (which needs to be 8-byte aligned) *
465 * void asm_store_fp_state_reg(u8 *mem); *
467 **************************************************************************/
469 asm_store_fp_state_reg:
471 retl /* return from leaf */
474 /* asm_load_fp_state_reg ***************************************************
476 * This function loades the 64-bit floating point state register from a *
477 * memory location. (which needs to be 8-byte aligned) *
480 * void asm_load_fp_state_reg(u8 *mem); *
482 **************************************************************************/
484 asm_load_fp_state_reg:
486 retl /* return from leaf */
492 asm_getclassvalues_atomic:
495 /* not doing a window save, using the global temporary registers */
496 ldsw [offbaseval+%o0],itmp1
497 ldsw [offdiffval+%o0],itmp2
498 ldsw [offbaseval+%o1],itmp3
500 stw itmp1,[offcast_super_baseval+%o2]
501 stw itmp2,[offcast_super_diffval+%o2]
502 stw itmp3,[offcast_sub_baseval+%o2]
503 jmpl ra_caller+8,zero /* caller's ra, b/c no window save */
509 asm_criticalsections:
510 #if defined(ENABLE_THREADS)
518 /* disable exec-stacks ********************************************************/
520 #if defined(__linux__) && defined(__ELF__)
521 .section .note.GNU-stack,"",%progbits
526 * These are local overrides for various environment variables in Emacs.
527 * Please do not remove this and leave it at the end of the file, where
528 * Emacs will automagically detect them.
529 * ---------------------------------------------------------------------
532 * indent-tabs-mode: t
536 * vim:noexpandtab:sw=4:ts=4: