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
57 .global asm_call_jit_compiler
59 .global asm_handle_exception
60 .global asm_handle_nat_exception
63 .global asm_abstractmethoderror
65 .global asm_criticalsections
66 .global asm_getclassvalues_atomic
69 /* asm_vm_call_method ******************************************************
71 * This function calls a Java-method (which possibly needs compilation) *
74 * java_objectheader *asm_vm_call_method(methodinfo *m, s4 vmargscount,
76 **************************************************************************/
78 .align 8 /* v9: All data types are aligned to their size */
80 .xword 0 /* catch type all */
81 .xword 0 /* handler pc */
83 .xword 0 /* start pc */
84 .word 1 /* extable size */
85 .word 0 /* ALIGNMENT PADDING */
86 .xword 0 /* line number table start */
87 .xword 0 /* line number table size */
88 .word 0 /* ALIGNMENT PADDING */
93 .word 0 /* frame size */
94 .xword 0 /* method pointer (pointer to name)*/
97 asm_vm_call_method_int:
98 asm_vm_call_method_long:
99 asm_vm_call_method_float:
100 asm_vm_call_method_double:
102 save %sp, -144, %sp /* 16 reg-save + 2 */
105 /* todo: copy fp registers */
107 brlez %i1, calljava_argsloaded
109 ldx [%i2 + offvmargdata], %o0
110 brlez %i1, calljava_argsloaded
113 ldx [%i2 + (offvmargdata+sizevmarg*1)], %o1
114 brlez %i1, calljava_argsloaded
117 ldx [%i2 + (offvmargdata+sizevmarg*2)], %o2
118 brlez %i1, calljava_argsloaded
121 ldx [%i2 + (offvmargdata+sizevmarg*3)], %o3
122 brlez %i1, calljava_argsloaded
125 ldx [%i2 + (offvmargdata+sizevmarg*4)], %o4
127 /* todo: use more out registers ? */
130 /* todo: stack frame layout!! */
132 brlez %i1, calljava_nocopy
133 sllx %i1, 3, %l0 /* remaining args * 8 */
134 mov %sp, %l1 /* right above window save area */
135 sub %sp, %l0, %sp /* allocate more stack space */
138 ldx [%i2 + (offvmargdata+sizevmarg*5)], %l0
140 inc sizevmarg, %i2 /* src++ */
141 inc 8, %l1 /* dst++ */
142 dec %i1 /* arg_count-- */
143 bnz %xcc, calljava_copyloop
147 mov %i0,itmp1 /* pass method info pointer via itmp1 */
149 setx asm_call_jit_compiler,%l0,mptr_itmp2 /* fake virtual function call (2 instr) */
150 stx mptr_itmp2,[%sp + 2047 + 17*8] /* store function address */
151 add %sp,2047 + 16*8,mptr_itmp2 /* set method pointer */
153 ldx [1*8 + mptr_itmp2], pv_caller /* method call as in Java */
154 jmpl pv_caller,ra_caller /* call JIT compiler */
157 /* pretend to restore pv */
158 add ra_caller,(asm_vm_call_method - calljava_jit2 + 8),pv_callee
161 mov %o0, %i0 /* pass on the return value */
162 return %i7 + 8 /* implicit window restore */
166 asm_vm_call_method_exception_handler:
169 call builtin_throw_exception
171 return %i7 + 8 /* implicit window restore */
176 /****************** function asm_call_jit_compiler *****************************
178 * invokes the compiler for untranslated JavaVM methods. *
180 * Register R0 contains a pointer to the method info structure (prepared *
181 * by createcompilerstub). Using the return address in R26 and the *
182 * offset in the LDA instruction or using the value in methodptr R28 the *
183 * patching address for storing the method address can be computed: *
185 * method address was either loaded using *
186 * M_LDQ (REG_PV, REG_PV, a) ; invokestatic/special ($27) *
187 * M_LDA (REG_PV, REG_RA, low) *
188 * M_LDAH(REG_PV, REG_RA, high) ; optional *
190 * M_LDQ (REG_PV, REG_METHODPTR, m) ; invokevirtual/interface ($28) *
191 * in the static case the method pointer can be computed using the *
192 * return address and the lda function following the jmp instruction *
194 *******************************************************************************/
196 asm_call_jit_compiler:
198 save %sp,-160,%sp /* regsave + 4 slots for float args */
200 SAVE_FLOAT_ARGUMENT_REGISTERS(16)
202 mov itmp1,%o0 /* pass methodinfo pointer */
203 mov mptr_itmp2,%o1 /* pass method pointer */
204 mov %fp,%o2 /* pass java sp (==fp) */
205 mov ra_callee,%o3 /* pass Java ra */
206 mov %o3,%o4 /* xpc is equal to ra */
207 call jit_asm_compile /* call jit compiler */
210 RESTORE_FLOAT_ARGUMENT_REGISTERS(16)
212 restore %o0,%g0,pv_caller /* restore the callers window */
213 /* the source o0 references the old window */
214 /* pv_caller references the new window */
218 brz pv_caller,L_asm_call_jit_compiler_exception
221 /* synchronise instruction cache moved somewhere else */
223 jmpl pv_caller,zero /* and call method, the method returns */
224 /* directly to the caller (ra). */
226 L_asm_call_jit_compiler_exception:
227 /* no need to do a save, only ra needs to be preserved */
229 /* we save ra in one of the application globals */
230 mov ra_caller,xpc_itmp3 /* save return address (xpc) */
232 call exceptions_get_and_clear_exception
235 mov xpc_itmp3,ra_caller /* restore return address (xpc) */
237 mov %o0,xptr_itmp2 /* get exception */
238 sub ra_caller,4,xpc_itmp3 /* exception address is ra - 4 */
239 ba L_asm_handle_nat_exception
244 /* asm_handle_exception ********************************************************
246 This function handles an exception. It does not use the usual calling
247 conventions. The exception pointer is passed in REG_ITMP2 and the
248 pc from the exception raising position is passed in REG_ITMP3. It searches
249 the local exception table for a handler. If no one is found, it unwinds
250 stacks and continues searching the callers.
252 *******************************************************************************/
255 asm_handle_nat_exception:
256 L_asm_handle_nat_exception: /* required for PIC code */
257 L_asm_handle_exception_stack_loop:
258 /* exception handling assumes that the current java method saved */
259 /* the caller's window */
261 /* get ra and pv before saving the window */
266 mov xptr_itmp2,%l0 /* save exception pointer */
267 mov xpc_itmp3,%l1 /* save exception pc */
268 mov zero,%l2 /* save maybe-leaf flag (cleared) */
270 mov %l0,%o0 /* pass xptr */
271 mov %l1,%o1 /* pass xpc */
272 mov %g4,%o2 /* pass PV */
273 mov %fp,%o3 /* pass Java SP */
275 asm_handle_exception:
278 /* save bigger stack frame for float args and temps */
279 save %sp,(FLT_ARG_CNT+FLT_TMP_CNT+ABICALL_OFF)*8,%sp
281 SAVE_FLOAT_ARGUMENT_REGISTERS(ABICALL_OFF)
282 SAVE_FLOAT_TEMPORARY_REGISTERS(ABICALL_OFF+FLT_ARG_CNT)
284 mov xptr_itmp2,%l0 /* save exception pointer */
285 add zero,1,%l2 /* set maybe-leaf flag */
287 mov %l0,%o0 /* pass xptr */
288 mov xpc_itmp3,%o1 /* pass xpc */
289 mov %g4,%o2 /* pass PV */
290 mov %fp,%o3 /* pass Java SP */
292 L_asm_handle_exception_continue:
293 call exceptions_handle_exception
295 brz %o0,L_asm_handle_exception_not_caught
297 mov %o0,xpc_itmp3 /* move handlerpc into xpc */
298 mov %l0,xptr_itmp2 /* restore exception pointer */
300 brz %l2,L_asm_handle_exception_no_leaf
302 RESTORE_FLOAT_ARGUMENT_REGISTERS(ABICALL_OFF)
303 RESTORE_FLOAT_TEMPORARY_REGISTERS(ABICALL_OFF+FLT_ARG_CNT)
305 L_asm_handle_exception_no_leaf:
306 /* restore java window and stackframe (ra and pv are in there) */
308 jmpl xpc_itmp3, zero /* jump to the handler */
310 L_asm_handle_exception_not_caught:
311 mov %l0,xptr_itmp2 /* restore xptr */
312 restore /* free our stackframe and window */
313 /* maybe leaf flag gets cleared after branch to _loop */
315 restore /* unwind stack and window */
316 ba L_asm_handle_exception_stack_loop
317 mov xpc_itmp3,ra_caller /* the new xpc is ra (delay) */
322 /* asm_abstractmethoderror *****************************************************
324 Creates and throws an AbstractMethodError.
326 *******************************************************************************/
328 asm_abstractmethoderror:
329 /* do a window save */
332 mov %fp,%o0 /* pass java sp(==fp) */
333 mov ra_callee,%o1 /* pass exception address */
334 call exceptions_asm_new_abstractmethoderror
336 mov %o0,xptr_itmp2 /* get exception pointer */
337 sub ra_callee,4,xpc_itmp3 /* exception address is ra - 4 */
338 ba L_asm_handle_nat_exception
340 /* XXX: leave the register window open for handle_exception ??? */
342 asm_getclassvalues_atomic:
345 /* not doing a window save, using the global temporary registers */
346 ldsw [offbaseval+%o0],itmp1
347 ldsw [offdiffval+%o0],itmp2
348 ldsw [offbaseval+%o1],itmp3
350 stw itmp1,[offcast_super_baseval+%o2]
351 stw itmp2,[offcast_super_diffval+%o2]
352 stw itmp3,[offcast_sub_baseval+%o2]
353 jmpl ra_caller,zero /* caller's ra, b/c no window save */
355 .end asm_getclassvalues_atomic
360 asm_criticalsections:
361 #if defined(ENABLE_THREADS)