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
62 .global asm_patcher_wrapper
64 .global asm_abstractmethoderror
66 .global asm_criticalsections
67 .global asm_getclassvalues_atomic
70 /* asm_vm_call_method ******************************************************
72 * This function calls a Java-method (which possibly needs compilation) *
75 * java_objectheader *asm_vm_call_method(methodinfo *m, s4 vmargscount,
77 **************************************************************************/
79 .align 8 /* v9: All data types are aligned to their size */
81 .xword 0 /* catch type all */
82 .xword 0 /* handler pc */
84 .xword 0 /* start pc */
85 .word 1 /* extable size */
86 .word 0 /* ALIGNMENT PADDING */
87 .xword 0 /* line number table start */
88 .xword 0 /* line number table size */
89 .word 0 /* ALIGNMENT PADDING */
94 .word 0 /* frame size */
95 .xword 0 /* method pointer (pointer to name)*/
98 asm_vm_call_method_int:
99 asm_vm_call_method_long:
100 asm_vm_call_method_float:
101 asm_vm_call_method_double:
103 save %sp, -144, %sp /* 16 reg-save + 2 */
106 /* todo: copy fp registers */
108 brlez %i1, calljava_argsloaded
110 ldx [%i2 + offvmargdata], %o0
111 brlez %i1, calljava_argsloaded
114 ldx [%i2 + (offvmargdata+sizevmarg*1)], %o1
115 brlez %i1, calljava_argsloaded
118 ldx [%i2 + (offvmargdata+sizevmarg*2)], %o2
119 brlez %i1, calljava_argsloaded
122 ldx [%i2 + (offvmargdata+sizevmarg*3)], %o3
123 brlez %i1, calljava_argsloaded
126 ldx [%i2 + (offvmargdata+sizevmarg*4)], %o4
128 /* todo: use more out registers ? */
131 /* todo: stack frame layout!! */
133 brlez %i1, calljava_nocopy
134 sllx %i1, 3, %l0 /* remaining args * 8 */
135 mov %sp, %l1 /* right above window save area */
136 sub %sp, %l0, %sp /* allocate more stack space */
139 ldx [%i2 + (offvmargdata+sizevmarg*5)], %l0
141 inc sizevmarg, %i2 /* src++ */
142 inc 8, %l1 /* dst++ */
143 dec %i1 /* arg_count-- */
144 bnz %xcc, calljava_copyloop
147 /* set pv, like a java method does */
148 /* add ra_caller,(asm_vm_call_method - calljava_nocopy + 8),pv_callee */
149 setx asm_vm_call_method,%l0,pv_callee
151 mov %i0,itmp1 /* pass method info pointer via itmp1 */
153 setx asm_call_jit_compiler,%l0,mptr_itmp2 /* fake virtual function call (2 instr) */
154 stx mptr_itmp2,[%sp + 2047 + 17*8] /* store function address */
155 add %sp,2047 + 16*8,mptr_itmp2 /* set method pointer */
157 ldx [1*8 + mptr_itmp2], pv_caller /* method call as in Java */
158 jmpl pv_caller,ra_caller /* call JIT compiler */
161 /* pretend to restore pv */
162 add ra_caller,(asm_vm_call_method - calljava_jit2 + 8),zero
165 mov %o0, %i0 /* pass on the return value */
166 return %i7 + 8 /* implicit window restore */
170 asm_vm_call_method_exception_handler:
172 /* so far this function did not call any c functions */
173 /* but now we need ABI compliant argslots on the stack */
177 call builtin_throw_exception
179 return %i7 + 8 /* implicit window restore */
184 /****************** function asm_call_jit_compiler *****************************
186 * invokes the compiler for untranslated JavaVM methods. *
188 * Register R0 contains a pointer to the method info structure (prepared *
189 * by createcompilerstub). Using the return address in R26 and the *
190 * offset in the LDA instruction or using the value in methodptr R28 the *
191 * patching address for storing the method address can be computed: *
193 * method address was either loaded using *
194 * M_LDQ (REG_PV, REG_PV, a) ; invokestatic/special ($27) *
195 * M_LDA (REG_PV, REG_RA, low) *
196 * M_LDAH(REG_PV, REG_RA, high) ; optional *
198 * M_LDQ (REG_PV, REG_METHODPTR, m) ; invokevirtual/interface ($28) *
199 * in the static case the method pointer can be computed using the *
200 * return address and the lda function following the jmp instruction *
202 *******************************************************************************/
204 asm_call_jit_compiler:
206 save %sp,-208,%sp /* regsave(16) + argslots(6) + 4 float args */
208 SAVE_FLOAT_ARGUMENT_REGISTERS(22)
210 mov itmp1,%o0 /* pass methodinfo pointer */
211 mov mptr_itmp2,%o1 /* pass method pointer */
212 mov %fp,%o2 /* pass java sp (==fp) */
213 mov ra_callee,%o3 /* pass Java ra */
214 mov %o3,%o4 /* xpc is equal to ra */
215 call jit_asm_compile /* call jit compiler */
218 RESTORE_FLOAT_ARGUMENT_REGISTERS(22)
220 brz %o0,L_asm_call_jit_compiler_exception
223 restore %o0,%g0,pv_caller /* restore the callers window */
224 /* the source o0 references the old window */
225 /* pv_caller references the new window */
228 /* synchronise instruction cache moved somewhere else */
230 jmpl pv_caller,zero /* and call method, the method returns */
231 /* directly to the caller (ra). */
234 L_asm_call_jit_compiler_exception:
235 /* window still open, ra_callee valid, pv_callee undefined */
237 /* get pv for further exception handling */
239 call md_codegen_get_pv_from_pc /* get PV from RA */
243 call exceptions_get_and_clear_exception
246 mov %o0,xptr_itmp2 /* get exception */
247 mov ra_callee,xpc_itmp3 /* exception address is ra */
249 /* don't restore callers window, behave like java non-leaf */
251 b L_asm_handle_nat_exception
256 /* asm_handle_exception ********************************************************
258 This function handles an exception. It does not use the usual calling
259 conventions. The exception pointer is passed in REG_ITMP2 and the
260 pc from the exception raising position is passed in REG_ITMP3. It searches
261 the local exception table for a handler. If no one is found, it unwinds
262 stacks and continues searching the callers.
264 *******************************************************************************/
267 asm_handle_nat_exception:
268 L_asm_handle_nat_exception: /* required for PIC code */
269 L_asm_handle_exception_stack_loop:
270 /* exception handling assumes that the current java method saved */
271 /* the caller's window, and has a valid pv */
273 /* get ra and pv before saving the window */
278 mov xptr_itmp2,%l0 /* save exception pointer */
279 mov xpc_itmp3,%l1 /* save exception pc */
280 mov zero,%l2 /* save maybe-leaf flag (cleared) */
282 mov %l0,%o0 /* pass xptr */
283 mov %l1,%o1 /* pass xpc */
284 mov %g4,%o2 /* pass PV */
285 mov %fp,%o3 /* pass Java SP */
287 b L_asm_handle_exception_continue
290 asm_handle_exception:
293 /* save bigger stack frame for float args and temps */
294 save %sp,(FLT_ARG_CNT+FLT_TMP_CNT+CSTACK_CNT)*8,%sp
296 SAVE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
297 SAVE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
299 mov xptr_itmp2,%l0 /* save exception pointer */
300 add zero,1,%l2 /* set maybe-leaf flag */
302 mov %l0,%o0 /* pass xptr */
303 mov xpc_itmp3,%o1 /* pass xpc */
304 mov %g4,%o2 /* pass PV */
305 mov %fp,%o3 /* pass Java SP */
307 L_asm_handle_exception_continue:
308 call exceptions_handle_exception
311 brz %o0,L_asm_handle_exception_not_caught
314 mov %o0,xpc_itmp3 /* move handlerpc into xpc */
315 mov %l0,xptr_itmp2 /* restore exception pointer */
317 brz %l2,L_asm_handle_exception_no_leaf
320 RESTORE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
321 RESTORE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
323 L_asm_handle_exception_no_leaf:
324 /* restore java window and stackframe (ra and pv are in there) */
326 jmpl xpc_itmp3, zero /* jump to the handler */
329 L_asm_handle_exception_not_caught:
330 mov %l0,xptr_itmp2 /* restore xptr */
331 restore /* free our stackframe and window */
332 /* maybe leaf flag gets cleared after branch to _loop */
334 restore /* unwind stack and window */
335 ba L_asm_handle_exception_stack_loop
336 mov ra_caller,xpc_itmp3 /* the new xpc is ra (delay) */
341 /* asm_abstractmethoderror *****************************************************
343 Creates and throws an AbstractMethodError.
345 *******************************************************************************/
347 asm_abstractmethoderror:
348 /* do a window save */
351 mov %fp,%o0 /* pass java sp(==fp) */
352 mov ra_callee,%o1 /* pass exception address */
353 call exceptions_asm_new_abstractmethoderror
356 mov %o0,xptr_itmp2 /* get exception pointer */
357 sub ra_callee,4,xpc_itmp3 /* exception address is ra - 4 */
358 ba L_asm_handle_nat_exception
361 /* XXX: leave the register window open for handle_exception ??? */
363 /* asm_patcher_wrapper *********************************************************
367 Stack layout, when called from patcher stub
368 40 return address into JIT code (patch position)
369 32 pointer to virtual java_objectheader
370 24 machine code (which is patched back later)
371 16 unresolved class/method/field reference
372 8 data segment displacement from load instructions
373 0 patcher function pointer to call
374 -128 WINSAVE REGS (current SP)
376 *******************************************************************************/
380 /* get pv and ra, since the emit code is not passing it on */
381 mov ra_callee,ra_caller
382 mov pv_callee,pv_caller
384 /* create window and stack frame */
385 save %sp,-((FLT_ARG_CNT+FLT_TMP_CNT+CSTACK_CNT+4)*8),%sp
387 SAVE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
388 SAVE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
390 mov itmp1,%l0 /* save itmp1 */
391 mov itmp2,%l1 /* save itmp2 */
393 add %fp,JITSTACK,%o0 /* pass pseudo SP */
394 mov pv_callee,%o1 /* pass PV */
395 mov ra_callee,%o2 /* pass RA (correct for leafs) */
399 RESTORE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
400 RESTORE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
402 mov %l0,itmp1 /* restore itmp1 */
403 mov %l1,itmp2 /* restore itmp2 */
405 brnz %o0,L_asm_patcher_wrapper_exception
408 /* load RA (patch position from patcher data on the stack */
409 ldx [%fp+JITSTACK+5*8],itmp3
411 /* remove window and stack frame (and stack space allocated in the stub code */
412 restore %fp,6*8,%sp /* (source regs refer to old window, rd to new window) */
414 jmpl itmp3,zero /* jump to newly patched code */
417 L_asm_patcher_wrapper_exception:
418 mov %o0,xptr_itmp2 /* get exception */
419 ldx [%fp+JITSTACK+5*8],xpc_itmp3 /* xpc is RA */
420 restore %fp,6*8,%sp /* remove stack frame */
421 ba asm_handle_exception
425 asm_getclassvalues_atomic:
428 /* not doing a window save, using the global temporary registers */
429 ldsw [offbaseval+%o0],itmp1
430 ldsw [offdiffval+%o0],itmp2
431 ldsw [offbaseval+%o1],itmp3
433 stw itmp1,[offcast_super_baseval+%o2]
434 stw itmp2,[offcast_super_diffval+%o2]
435 stw itmp3,[offcast_sub_baseval+%o2]
436 jmpl ra_caller+8,zero /* caller's ra, b/c no window save */
442 asm_criticalsections:
443 #if defined(ENABLE_THREADS)