1 /* src/vm/jit/sparc64/asmpart.S - Java-C interface functions for Sparc
3 Copyright (C) 1996-2005, 2006 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 Contact: cacao@cacaojvm.org
27 Authors: Andreas Krall
33 $Id: asmpart.S 4749 2006-04-11 10:20:18Z twisti $
40 #include "vm/jit/sparc64/md-abi.h"
44 .register %g2,#scratch /* define as scratch */
45 .register %g3,#scratch /* XXX reserve for application */
48 /* export functions ***********************************************************/
50 .global asm_vm_call_method
51 .global asm_vm_call_method_int
52 .global asm_vm_call_method_long
53 .global asm_vm_call_method_float
54 .global asm_vm_call_method_double
55 .global asm_vm_call_method_exception_handler
56 .global asm_vm_call_method_end
58 .global asm_call_jit_compiler
60 .global asm_handle_exception
61 .global asm_handle_nat_exception
63 .global asm_patcher_wrapper
65 .global asm_abstractmethoderror
67 .global asm_criticalsections
68 .global asm_getclassvalues_atomic
71 /* asm_vm_call_method ******************************************************
73 * This function calls a Java-method (which possibly needs compilation) *
76 * java_objectheader *asm_vm_call_method(methodinfo *m, s4 vmargscount,
78 **************************************************************************/
80 .align 8 /* v9: All data types are aligned to their size */
82 .xword 0 /* catch type all */
83 .xword 0 /* handler pc */
85 .xword 0 /* start pc */
86 .word 1 /* extable size */
87 .word 0 /* ALIGNMENT PADDING */
88 .xword 0 /* line number table start */
89 .xword 0 /* line number table size */
90 .word 0 /* ALIGNMENT PADDING */
95 .word 0 /* frame size */
96 .xword 0 /* method pointer (pointer to name)*/
99 asm_vm_call_method_int:
100 asm_vm_call_method_long:
101 asm_vm_call_method_float:
102 asm_vm_call_method_double:
104 save %sp,-144,%sp /* 16 reg-save + 2 */
107 /* %i2 not needed after _nocopy -> calculate in branch delay */
109 brlez %i1, calljava_nocopy
111 dec %i1 /* branch delay */
112 ldx [%i2 + offvmargdata],%o0
113 ldd [%i2 + offvmargdata],fa0
114 brlez %i1,calljava_nocopy
116 dec %i1 /* branch delay */
117 ldx [%i2 + (offvmargdata+sizevmarg*1)],%o1
118 ldd [%i2 + (offvmargdata+sizevmarg*1)],fa1
119 brlez %i1,calljava_nocopy
122 ldx [%i2 + (offvmargdata+sizevmarg*2)],%o2
123 ldd [%i2 + (offvmargdata+sizevmarg*2)],fa2
124 brlez %i1,calljava_nocopy
127 ldx [%i2 + (offvmargdata+sizevmarg*3)],%o3
128 ldd [%i2 + (offvmargdata+sizevmarg*3)],fa3
129 brlez %i1,calljava_nocopy
132 ldx [%i2 + (offvmargdata+sizevmarg*4)],%o4
133 ldd [%i2 + (offvmargdata+sizevmarg*4)],fa4
136 brlez %i1, calljava_nocopy
138 sllx %i1,3,%l0 /* remaining args * 8 */
139 add %sp,16*8+bias,%l1 /* right above window save area */
140 sub %sp,%l0,%sp /* allocate more stack space */
143 ldx [%i2 + (offvmargdata+sizevmarg*5)],%l0
145 inc sizevmarg,%i2 /* src++ */
146 subcc %i1,1,%i1 /* arg_count-- */
147 bnz %xcc, calljava_copyloop /* use cc from previous instr */
148 inc 8,%l1 /* dst++ (delay) */
152 /* set pv, like a java method does */
153 /* add ra_caller,(asm_vm_call_method - calljava_nocopy + 8),pv_callee */
154 setx asm_vm_call_method,%l0,pv_callee
156 mov %i0,itmp1 /* pass method info pointer via itmp1 */
158 setx asm_call_jit_compiler,%l0,mptr_itmp2 /* fake virtual function call (2 instr) */
159 stx mptr_itmp2,[%sp + 2047 + 17*8] /* store function address */
160 add %sp,2047 + 16*8,mptr_itmp2 /* set method pointer */
162 ldx [1*8 + mptr_itmp2], pv_caller /* method call as in Java */
163 jmpl pv_caller,ra_caller /* call JIT compiler */
166 /* pretend to restore pv */
167 add ra_caller,(asm_vm_call_method - calljava_jit2 + 8),zero
170 mov %o0, %i0 /* pass on the return value */
171 return %i7 + 8 /* implicit window restore */
175 asm_vm_call_method_exception_handler:
177 /* so far this function did not call any c functions */
178 /* but now we need ABI compliant argslots on the stack */
182 call builtin_throw_exception
184 return %i7 + 8 /* implicit window restore */
185 asm_vm_call_method_end:
190 /****************** function asm_call_jit_compiler *****************************
192 * invokes the compiler for untranslated JavaVM methods. *
194 * Register R0 contains a pointer to the method info structure (prepared *
195 * by createcompilerstub). Using the return address in R26 and the *
196 * offset in the LDA instruction or using the value in methodptr R28 the *
197 * patching address for storing the method address can be computed: *
199 * method address was either loaded using *
200 * M_LDQ (REG_PV, REG_PV, a) ; invokestatic/special ($27) *
201 * M_LDA (REG_PV, REG_RA, low) *
202 * M_LDAH(REG_PV, REG_RA, high) ; optional *
204 * M_LDQ (REG_PV, REG_METHODPTR, m) ; invokevirtual/interface ($28) *
205 * in the static case the method pointer can be computed using the *
206 * return address and the lda function following the jmp instruction *
208 *******************************************************************************/
210 asm_call_jit_compiler:
212 /* stacksave for regsave(16) + argslots(6) + float args */
213 save %sp,-((16+6+FLT_ARG_CNT)*8),%sp
215 SAVE_FLOAT_ARGUMENT_REGISTERS(22)
217 mov itmp1,%o0 /* pass methodinfo pointer */
218 mov mptr_itmp2,%o1 /* pass method pointer */
219 mov %fp,%o2 /* pass java sp (==fp) */
220 mov ra_callee,%o3 /* pass Java ra */
221 mov %o3,%o4 /* xpc is equal to ra */
222 call jit_asm_compile /* call jit compiler */
225 RESTORE_FLOAT_ARGUMENT_REGISTERS(22)
227 brz %o0,L_asm_call_jit_compiler_exception
230 restore %o0,%g0,pv_caller /* restore the callers window */
231 /* the source o0 references the old window */
232 /* pv_caller references the new window */
235 /* synchronise instruction cache moved somewhere else */
237 jmpl pv_caller,zero /* and call method, the method returns */
238 /* directly to the caller (ra). */
241 L_asm_call_jit_compiler_exception:
242 /* window still open, ra_callee valid, pv_callee undefined */
244 call exceptions_get_and_clear_exception
247 mov %o0,xptr_itmp2 /* get exception */
248 mov ra_callee,xpc_itmp3 /* exception address is address of call */
250 /* restore the window of the calling function */
253 b L_asm_handle_nat_exception
258 /* asm_handle_exception ********************************************************
260 This function handles an exception. It does not use the usual calling
261 conventions. The exception pointer is passed in REG_ITMP2 and the
262 pc from the exception raising position is passed in REG_ITMP3. It searches
263 the local exception table for a handler. If no one is found, it unwinds
264 stacks and continues searching the callers.
266 *******************************************************************************/
269 asm_handle_nat_exception:
270 L_asm_handle_nat_exception: /* required for PIC code */
271 L_asm_handle_exception_stack_loop:
272 /* exception handling assumes that the current java method saved */
273 /* the caller's window, and has a valid pv */
275 /* get ra and pv before saving the window */
280 mov xptr_itmp2,%l0 /* save exception pointer */
281 mov xpc_itmp3,%l1 /* save exception pc */
282 mov zero,%l2 /* save maybe-leaf flag (cleared) */
284 mov %l0,%o0 /* pass xptr */
285 mov %l1,%o1 /* pass xpc */
286 mov %g4,%o2 /* pass PV */
287 mov %fp,%o3 /* pass Java SP */
289 b L_asm_handle_exception_continue
292 asm_handle_exception:
295 /* save bigger stack frame for float args and temps */
296 save %sp,-((FLT_ARG_CNT+FLT_TMP_CNT+CSTACK_CNT)*8),%sp
298 SAVE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
299 SAVE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
301 mov xptr_itmp2,%l0 /* save exception pointer */
302 add zero,1,%l2 /* set maybe-leaf flag */
304 mov %l0,%o0 /* pass xptr */
305 mov xpc_itmp3,%o1 /* pass xpc */
306 mov %g4,%o2 /* pass PV */
307 mov %fp,%o3 /* pass Java SP */
309 L_asm_handle_exception_continue:
310 call exceptions_handle_exception
313 brz %o0,L_asm_handle_exception_not_caught
316 mov %o0,xpc_itmp3 /* move handlerpc into xpc */
317 mov %l0,xptr_itmp2 /* restore exception pointer */
319 brz %l2,L_asm_handle_exception_no_leaf
322 RESTORE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
323 RESTORE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
325 L_asm_handle_exception_no_leaf:
326 /* restore java window and stackframe (ra and pv are in there) */
328 jmpl xpc_itmp3, zero /* jump to the handler */
331 L_asm_handle_exception_not_caught:
332 mov %l0,xptr_itmp2 /* restore xptr */
333 restore /* free our stackframe and window */
334 /* maybe leaf flag gets cleared after branch to _loop */
336 restore /* unwind stack and window */
337 ba L_asm_handle_exception_stack_loop
338 mov ra_caller,xpc_itmp3 /* the new xpc is ra (delay) */
343 /* asm_abstractmethoderror *****************************************************
345 Creates and throws an AbstractMethodError.
347 *******************************************************************************/
349 asm_abstractmethoderror:
350 /* do a window save */
353 mov %fp,%o0 /* pass java sp(==fp) */
354 mov ra_callee,%o1 /* pass exception address */
355 call exceptions_asm_new_abstractmethoderror
358 mov %o0,xptr_itmp2 /* get exception pointer */
359 sub ra_callee,4,xpc_itmp3 /* exception address is ra - 4 */
360 ba L_asm_handle_nat_exception
363 /* XXX: leave the register window open for handle_exception ??? */
365 /* asm_patcher_wrapper *********************************************************
369 Stack layout, when called from patcher stub
370 40 return address into JIT code (patch position)
371 32 pointer to virtual java_objectheader
372 24 machine code (which is patched back later)
373 16 unresolved class/method/field reference
374 8 data segment displacement from load instructions
375 0 patcher function pointer to call
376 -128 WINSAVE REGS (current SP)
378 *******************************************************************************/
382 /* get pv and ra, since the emit code is not passing it on */
383 mov ra_callee,ra_caller
384 mov pv_callee,pv_caller
386 /* create window and stack frame */
387 save %sp,-((FLT_ARG_CNT+FLT_TMP_CNT+CSTACK_CNT+4)*8),%sp
389 SAVE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
390 SAVE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
392 mov itmp1,%l0 /* save itmp1 */
393 mov itmp2,%l1 /* save itmp2 */
395 add %fp,JITSTACK,%o0 /* pass pseudo SP */
396 mov pv_callee,%o1 /* pass PV */
397 mov ra_callee,%o2 /* pass RA (correct for leafs) */
401 RESTORE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
402 RESTORE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
404 mov %l0,itmp1 /* restore itmp1 */
405 mov %l1,itmp2 /* restore itmp2 */
407 brnz %o0,L_asm_patcher_wrapper_exception
410 /* load RA (patch position from patcher data on the stack */
411 ldx [%fp+JITSTACK+5*8],itmp3
413 /* remove window and stack frame (and stack space allocated in the stub code */
414 restore %fp,6*8,%sp /* (source regs refer to old window, rd to new window) */
416 jmpl itmp3,zero /* jump to newly patched code */
419 L_asm_patcher_wrapper_exception:
420 mov %o0,xptr_itmp2 /* get exception */
421 ldx [%fp+JITSTACK+5*8],xpc_itmp3 /* xpc is RA */
422 restore %fp,6*8,%sp /* remove stack frame */
423 ba asm_handle_exception
427 asm_getclassvalues_atomic:
430 /* not doing a window save, using the global temporary registers */
431 ldsw [offbaseval+%o0],itmp1
432 ldsw [offdiffval+%o0],itmp2
433 ldsw [offbaseval+%o1],itmp3
435 stw itmp1,[offcast_super_baseval+%o2]
436 stw itmp2,[offcast_super_diffval+%o2]
437 stw itmp3,[offcast_sub_baseval+%o2]
438 jmpl ra_caller+8,zero /* caller's ra, b/c no window save */
444 asm_criticalsections:
445 #if defined(ENABLE_THREADS)