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 $
34 #include "vm/jit/sparc64/md-abi.h"
37 .register %g2,#scratch /* define as scratch */
38 .register %g3,#scratch /* XXX reserve for application */
41 /* export functions ***********************************************************/
43 .global asm_vm_call_method
44 .global asm_vm_call_method_int
45 .global asm_vm_call_method_long
46 .global asm_vm_call_method_float
47 .global asm_vm_call_method_double
48 .global asm_vm_call_method_exception_handler
49 .global asm_vm_call_method_end
51 .global asm_call_jit_compiler
53 .global asm_handle_exception
54 .global asm_handle_nat_exception
56 .global asm_patcher_wrapper
58 .global asm_abstractmethoderror
60 .global asm_store_fp_state_reg
61 .global asm_load_fp_state_reg
64 /* asm_vm_call_method ******************************************************
66 * This function calls a Java-method (which possibly needs compilation) *
68 * If the java method is throwing an exception, NULL will be returned.
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 /* pointer to usable stack */
103 /* i1: ptr to arg array */
104 /* i2: num stackargs */
118 brlez %i2, calljava_nocopy
119 nop /* delay: fill me! */
121 sllx %i2,3,%l0 /* remaining args * 8 */
122 sub %sp,%l0,%sp /* allocate more stack space */
123 add %sp,JITSTACK,%l1 /* adjust stack begin pointer */
125 asm_vm_call_copyloop:
126 ldx [%i1+10*8],%l0 /* load argument from array */
127 stx %l0,[%l1] /* store argument to stack */
129 inc 8,%i1 /* src++ */
130 subcc %i2,1,%i2 /* arg_count-- */
131 bnz %xcc, asm_vm_call_copyloop /* use cc from previous instr */
132 inc 8,%l1 /* dst++ (delay) */
136 /* set pv, like a java method does */
137 setx asm_vm_call_method,%l0,pv_callee
139 stx %i0,[%l1 + 1*8] /* store PV on stack */
140 mov %l1,mptr_itmp2 /* set address of PV (-1*8) */
142 ldx [1*8 + mptr_itmp2], pv_caller /* load PV from stack */
143 jmpl pv_caller,ra_caller /* method call as in Java */
147 /* pretend to restore pv */
148 add ra_caller,(asm_vm_call_method - calljava_jit2 + 8),zero
151 mov %o0, %i0 /* pass on the return value */
152 return %i7 + 8 /* implicit window restore */
156 asm_vm_call_method_exception_handler:
158 /* so far this function did not call any c functions */
159 /* but now we need ABI compliant argslots on the stack */
163 call builtin_throw_exception
165 return %i7 + 8 /* implicit window restore */
166 asm_vm_call_method_end:
167 mov zero,%o0 /* delay: return NULL */
171 /****************** function asm_call_jit_compiler *****************************
173 * invokes the compiler for untranslated JavaVM methods. *
175 * Register R0 contains a pointer to the method info structure (prepared *
176 * by createcompilerstub). Using the return address in R26 and the *
177 * offset in the LDA instruction or using the value in methodptr R28 the *
178 * patching address for storing the method address can be computed: *
180 * method address was either loaded using *
181 * M_LDQ (REG_PV, REG_PV, a) ; invokestatic/special ($27) *
182 * M_LDA (REG_PV, REG_RA, low) *
183 * M_LDAH(REG_PV, REG_RA, high) ; optional *
185 * M_LDQ (REG_PV, REG_METHODPTR, m) ; invokevirtual/interface ($28) *
186 * in the static case the method pointer can be computed using the *
187 * return address and the lda function following the jmp instruction *
189 *******************************************************************************/
191 asm_call_jit_compiler:
193 /* stacksave for regsave(16) + argslots(6) + float args */
194 /* Note: +1 to keep stack 16-byte aligned */
195 save %sp,-((16+6+FLT_ARG_CNT+1)*8),%sp
197 SAVE_FLOAT_ARGUMENT_REGISTERS(22)
199 mov itmp1,%o0 /* pass methodinfo pointer */
200 mov mptr_itmp2,%o1 /* pass method pointer */
201 mov %fp,%o2 /* pass java sp (==fp) */
202 mov ra_callee,%o3 /* pass Java ra */
203 mov %o3,%o4 /* xpc is equal to ra */
204 call jit_asm_compile /* call jit compiler */
207 RESTORE_FLOAT_ARGUMENT_REGISTERS(22)
209 brz %o0,L_asm_call_jit_compiler_exception
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 */
217 /* synchronise instruction cache moved somewhere else */
219 jmpl pv_caller,zero /* and call method, the method returns */
220 /* directly to the caller (ra). */
223 L_asm_call_jit_compiler_exception:
224 /* window still open, ra_callee valid, pv_callee undefined */
226 call exceptions_get_and_clear_exception
229 mov %o0,xptr_itmp2 /* get exception */
230 mov ra_callee,xpc_itmp3 /* exception address is address of call */
232 /* restore the window of the calling function */
235 b L_asm_handle_nat_exception
240 /* asm_handle_exception ********************************************************
242 This function handles an exception. It does not use the usual calling
243 conventions. The exception pointer is passed in REG_ITMP2 and the
244 pc from the exception raising position is passed in REG_ITMP3. It searches
245 the local exception table for a handler. If no one is found, it unwinds
246 stacks and continues searching the callers.
248 *******************************************************************************/
251 asm_handle_nat_exception:
252 L_asm_handle_nat_exception: /* required for PIC code */
253 L_asm_handle_exception_stack_loop:
254 /* exception handling assumes that the current java method saved */
255 /* the caller's window, and has a valid pv */
257 /* get ra and pv before saving the window */
262 mov xptr_itmp2,%l0 /* save exception pointer */
263 mov xpc_itmp3,%l1 /* save exception pc */
264 mov zero,%l2 /* save maybe-leaf flag (cleared) */
266 mov %l0,%o0 /* pass xptr */
267 mov %l1,%o1 /* pass xpc */
268 mov %g4,%o2 /* pass PV */
269 mov %fp,%o3 /* pass Java SP */
271 b L_asm_handle_exception_continue
274 asm_handle_exception:
277 /* save bigger stack frame for float args and temps */
278 save %sp,-((FLT_ARG_CNT+FLT_TMP_CNT+16+CSTACK_CNT)*8),%sp
280 SAVE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
281 SAVE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
283 mov xptr_itmp2,%l0 /* save exception pointer */
284 add zero,1,%l2 /* set maybe-leaf flag */
286 mov %l0,%o0 /* pass xptr */
287 mov xpc_itmp3,%o1 /* pass xpc */
288 mov %g4,%o2 /* pass PV */
289 mov %fp,%o3 /* pass Java SP */
291 L_asm_handle_exception_continue:
292 call exceptions_handle_exception
295 brz %o0,L_asm_handle_exception_not_caught
298 mov %o0,xpc_itmp3 /* move handlerpc into xpc */
299 mov %l0,xptr_itmp2 /* restore exception pointer */
301 brz %l2,L_asm_handle_exception_no_leaf
304 RESTORE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
305 RESTORE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
307 L_asm_handle_exception_no_leaf:
308 /* restore java window and stackframe (ra and pv are in there) */
310 jmpl xpc_itmp3, zero /* jump to the handler */
313 L_asm_handle_exception_not_caught:
314 mov %l0,xptr_itmp2 /* restore xptr */
315 restore /* free our stackframe and window */
316 /* maybe leaf flag gets cleared after branch to _loop */
318 restore /* unwind stack and window */
319 ba L_asm_handle_exception_stack_loop
320 mov ra_caller,xpc_itmp3 /* the new xpc is ra (delay) */
325 /* asm_abstractmethoderror *****************************************************
327 Creates and throws an AbstractMethodError.
329 *******************************************************************************/
331 asm_abstractmethoderror:
332 /* do a window save */
335 mov %fp,%o0 /* pass java sp(==fp) */
336 mov ra_callee,%o1 /* pass exception address */
337 call exceptions_asm_new_abstractmethoderror
340 mov %o0,xptr_itmp2 /* get exception pointer */
341 sub ra_callee,4,xpc_itmp3 /* exception address is ra - 4 */
342 ba L_asm_handle_nat_exception
345 /* XXX: leave the register window open for handle_exception ??? */
347 /* asm_patcher_wrapper *********************************************************
351 Stack layout, when called from patcher stub
352 40 return address into JIT code (patch position)
353 32 pointer to virtual java_objectheader
354 24 machine code (which is patched back later)
355 16 unresolved class/method/field reference
356 8 data segment displacement from load instructions
357 0 patcher function pointer to call
358 -128 WINSAVE REGS (current SP)
360 *******************************************************************************/
364 /* get pv and ra, since the emit code is not passing it on */
365 mov ra_callee,ra_caller
366 mov pv_callee,pv_caller
368 /* create window and stack frame */
369 save %sp,-((FLT_ARG_CNT+FLT_TMP_CNT+16+CSTACK_CNT+6)*8),%sp
371 SAVE_FLOAT_RETURN_REGISTER(CSTACK_CNT)
372 SAVE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT+1)
373 SAVE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+1+FLT_ARG_CNT)
375 mov itmp1,%l0 /* save itmp1 */
376 mov itmp2,%l1 /* save itmp2 */
378 add %fp,JITSTACK,%o0 /* pass pseudo SP */
379 mov pv_callee,%o1 /* pass PV */
380 mov ra_callee,%o2 /* pass RA (correct for leafs) */
384 RESTORE_FLOAT_RETURN_REGISTER(CSTACK_CNT)
385 RESTORE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT+1)
386 RESTORE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+1+FLT_ARG_CNT)
388 mov %l0,itmp1 /* restore itmp1 */
389 mov %l1,itmp2 /* restore itmp2 */
391 brnz %o0,L_asm_patcher_wrapper_exception
394 /* load RA (patch position from patcher data on the stack */
395 ldx [%fp+JITSTACK+5*8],itmp3
397 /* remove window and stack frame (and stack space allocated in the stub code */
398 restore %fp,6*8,%sp /* (source regs refer to old window, rd to new window) */
400 jmpl itmp3,zero /* jump to newly patched code */
403 L_asm_patcher_wrapper_exception:
404 mov %o0,xptr_itmp2 /* get exception */
405 ldx [%fp+JITSTACK+5*8],xpc_itmp3 /* xpc is RA */
406 restore %fp,6*8,%sp /* remove stack frame */
407 ba asm_handle_exception
412 /* asm_store_fp_state_reg **************************************************
414 * This function stores the 64-bit floating point state register to a *
415 * memory location. (which needs to be 8-byte aligned) *
418 * void asm_store_fp_state_reg(u8 *mem); *
420 **************************************************************************/
422 asm_store_fp_state_reg:
424 retl /* return from leaf */
427 /* asm_load_fp_state_reg ***************************************************
429 * This function loades the 64-bit floating point state register from a *
430 * memory location. (which needs to be 8-byte aligned) *
433 * void asm_load_fp_state_reg(u8 *mem); *
435 **************************************************************************/
437 asm_load_fp_state_reg:
439 retl /* return from leaf */
443 /* disable exec-stacks ********************************************************/
445 #if defined(__linux__) && defined(__ELF__)
446 .section .note.GNU-stack,"",%progbits
451 * These are local overrides for various environment variables in Emacs.
452 * Please do not remove this and leave it at the end of the file, where
453 * Emacs will automagically detect them.
454 * ---------------------------------------------------------------------
457 * indent-tabs-mode: t
461 * vim:noexpandtab:sw=4:ts=4: