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
32 #include "vm/jit/sparc64/md-abi.h"
35 .register %g2,#scratch /* define as scratch */
36 .register %g3,#scratch /* XXX reserve for application */
39 /* export functions ***********************************************************/
41 .global asm_vm_call_method
42 .global asm_vm_call_method_int
43 .global asm_vm_call_method_long
44 .global asm_vm_call_method_float
45 .global asm_vm_call_method_double
46 .global asm_vm_call_method_exception_handler
47 .global asm_vm_call_method_end
49 .global asm_call_jit_compiler
51 .global asm_handle_exception
52 .global asm_handle_nat_exception
54 .global asm_patcher_wrapper
56 .global asm_abstractmethoderror
58 .global asm_store_fp_state_reg
59 .global asm_load_fp_state_reg
62 /* asm_vm_call_method ******************************************************
64 * This function calls a Java-method (which possibly needs compilation) *
66 * If the java method is throwing an exception, NULL will be returned.
69 * java_objectheader *asm_vm_call_method(methodinfo *m, s4 vmargscount,
71 **************************************************************************/
73 .align 8 /* v9: All data types are aligned to their size */
75 .xword 0 /* catch type all */
76 .xword 0 /* handler pc */
78 .xword 0 /* start pc */
79 .word 1 /* extable size */
80 .word 0 /* ALIGNMENT PADDING */
81 .xword 0 /* line number table start */
82 .xword 0 /* line number table size */
83 .word 0 /* ALIGNMENT PADDING */
88 .word 0 /* frame size */
89 .xword 0 /* method pointer (pointer to name)*/
92 asm_vm_call_method_int:
93 asm_vm_call_method_long:
94 asm_vm_call_method_float:
95 asm_vm_call_method_double:
97 save %sp,-((JITSTACK_CNT+2)*8),%sp
98 add %sp,JITSTACK,%l1 /* pointer to usable stack */
101 /* i1: ptr to arg array */
102 /* i2: num stackargs */
116 brlez %i2, calljava_nocopy
117 nop /* delay: fill me! */
119 sllx %i2,3,%l0 /* remaining args * 8 */
120 sub %sp,%l0,%sp /* allocate more stack space */
121 add %sp,JITSTACK,%l1 /* adjust stack begin pointer */
123 asm_vm_call_copyloop:
124 ldx [%i1+10*8],%l0 /* load argument from array */
125 stx %l0,[%l1] /* store argument to stack */
127 inc 8,%i1 /* src++ */
128 subcc %i2,1,%i2 /* arg_count-- */
129 bnz %xcc, asm_vm_call_copyloop /* use cc from previous instr */
130 inc 8,%l1 /* dst++ (delay) */
134 /* set pv, like a java method does */
135 setx asm_vm_call_method,%l0,pv_callee
137 stx %i0,[%l1 + 1*8] /* store PV on stack */
138 mov %l1,mptr_itmp2 /* set address of PV (-1*8) */
140 ldx [1*8 + mptr_itmp2], pv_caller /* load PV from stack */
141 jmpl pv_caller,ra_caller /* method call as in Java */
145 /* pretend to restore pv */
146 add ra_caller,(asm_vm_call_method - calljava_jit2 + 8),zero
149 mov %o0, %i0 /* pass on the return value */
150 return %i7 + 8 /* implicit window restore */
154 asm_vm_call_method_exception_handler:
156 /* so far this function did not call any c functions */
157 /* but now we need ABI compliant argslots on the stack */
161 call builtin_throw_exception
163 return %i7 + 8 /* implicit window restore */
164 asm_vm_call_method_end:
165 mov zero,%o0 /* delay: return NULL */
169 /****************** function asm_call_jit_compiler *****************************
171 * invokes the compiler for untranslated JavaVM methods. *
173 * Register R0 contains a pointer to the method info structure (prepared *
174 * by createcompilerstub). Using the return address in R26 and the *
175 * offset in the LDA instruction or using the value in methodptr R28 the *
176 * patching address for storing the method address can be computed: *
178 * method address was either loaded using *
179 * M_LDQ (REG_PV, REG_PV, a) ; invokestatic/special ($27) *
180 * M_LDA (REG_PV, REG_RA, low) *
181 * M_LDAH(REG_PV, REG_RA, high) ; optional *
183 * M_LDQ (REG_PV, REG_METHODPTR, m) ; invokevirtual/interface ($28) *
184 * in the static case the method pointer can be computed using the *
185 * return address and the lda function following the jmp instruction *
187 *******************************************************************************/
189 asm_call_jit_compiler:
191 /* stacksave for regsave(16) + argslots(6) + float args */
192 /* Note: +1 to keep stack 16-byte aligned */
193 save %sp,-((16+6+FLT_ARG_CNT+1)*8),%sp
195 SAVE_FLOAT_ARGUMENT_REGISTERS(22)
197 mov itmp1,%o0 /* pass methodinfo pointer */
198 mov mptr_itmp2,%o1 /* pass method pointer */
199 mov %fp,%o2 /* pass java sp (==fp) */
200 mov ra_callee,%o3 /* pass Java ra */
201 mov %o3,%o4 /* xpc is equal to ra */
202 call jit_asm_compile /* call jit compiler */
205 RESTORE_FLOAT_ARGUMENT_REGISTERS(22)
207 brz %o0,L_asm_call_jit_compiler_exception
210 restore %o0,%g0,pv_caller /* restore the callers window */
211 /* the source o0 references the old window */
212 /* pv_caller references the new window */
215 /* synchronise instruction cache moved somewhere else */
217 jmpl pv_caller,zero /* and call method, the method returns */
218 /* directly to the caller (ra). */
221 L_asm_call_jit_compiler_exception:
222 /* window still open, ra_callee valid, pv_callee undefined */
224 call exceptions_get_and_clear_exception
227 mov %o0,xptr_itmp2 /* get exception */
228 mov ra_callee,xpc_itmp3 /* exception address is address of call */
230 /* restore the window of the calling function */
233 b L_asm_handle_nat_exception
238 /* asm_handle_exception ********************************************************
240 This function handles an exception. It does not use the usual calling
241 conventions. The exception pointer is passed in REG_ITMP2 and the
242 pc from the exception raising position is passed in REG_ITMP3. It searches
243 the local exception table for a handler. If no one is found, it unwinds
244 stacks and continues searching the callers.
246 *******************************************************************************/
249 asm_handle_nat_exception:
250 L_asm_handle_nat_exception: /* required for PIC code */
251 L_asm_handle_exception_stack_loop:
252 /* exception handling assumes that the current java method saved */
253 /* the caller's window, and has a valid pv */
255 /* get ra and pv before saving the window */
260 mov xptr_itmp2,%l0 /* save exception pointer */
261 mov xpc_itmp3,%l1 /* save exception pc */
262 mov zero,%l2 /* save maybe-leaf flag (cleared) */
264 mov %l0,%o0 /* pass xptr */
265 mov %l1,%o1 /* pass xpc */
266 mov %g4,%o2 /* pass PV */
267 mov %fp,%o3 /* pass Java SP */
269 b L_asm_handle_exception_continue
272 asm_handle_exception:
275 /* save bigger stack frame for float args and temps */
276 save %sp,-((FLT_ARG_CNT+FLT_TMP_CNT+16+CSTACK_CNT)*8),%sp
278 SAVE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
279 SAVE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+FLT_ARG_CNT)
281 mov xptr_itmp2,%l0 /* save exception pointer */
282 add zero,1,%l2 /* set maybe-leaf flag */
284 mov %l0,%o0 /* pass xptr */
285 mov xpc_itmp3,%o1 /* pass xpc */
286 mov %g4,%o2 /* pass PV */
287 mov %fp,%o3 /* pass Java SP */
289 L_asm_handle_exception_continue:
290 call exceptions_handle_exception
293 brz %o0,L_asm_handle_exception_not_caught
296 mov %o0,xpc_itmp3 /* move handlerpc into xpc */
297 mov %l0,xptr_itmp2 /* restore exception pointer */
299 brz %l2,L_asm_handle_exception_no_leaf
302 RESTORE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT)
303 RESTORE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+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 */
311 L_asm_handle_exception_not_caught:
312 mov %l0,xptr_itmp2 /* restore xptr */
313 restore /* free our stackframe and window */
314 /* maybe leaf flag gets cleared after branch to _loop */
316 restore /* unwind stack and window */
317 ba L_asm_handle_exception_stack_loop
318 mov ra_caller,xpc_itmp3 /* the new xpc is ra (delay) */
323 /* asm_abstractmethoderror *****************************************************
325 Creates and throws an AbstractMethodError.
327 *******************************************************************************/
329 asm_abstractmethoderror:
330 /* do a window save */
333 mov %fp,%o0 /* pass java sp(==fp) */
334 mov ra_callee,%o1 /* pass exception address */
335 call exceptions_asm_new_abstractmethoderror
338 mov %o0,xptr_itmp2 /* get exception pointer */
339 sub ra_callee,4,xpc_itmp3 /* exception address is ra - 4 */
340 ba L_asm_handle_nat_exception
343 /* XXX: leave the register window open for handle_exception ??? */
345 /* asm_patcher_wrapper *********************************************************
349 Stack layout, when called from patcher stub
350 40 return address into JIT code (patch position)
351 32 pointer to virtual java_objectheader
352 24 machine code (which is patched back later)
353 16 unresolved class/method/field reference
354 8 data segment displacement from load instructions
355 0 patcher function pointer to call
356 -128 WINSAVE REGS (current SP)
358 *******************************************************************************/
362 /* get pv and ra, since the emit code is not passing it on */
363 mov ra_callee,ra_caller
364 mov pv_callee,pv_caller
366 /* create window and stack frame */
367 save %sp,-((FLT_ARG_CNT+FLT_TMP_CNT+16+CSTACK_CNT+6)*8),%sp
369 SAVE_FLOAT_RETURN_REGISTER(CSTACK_CNT)
370 SAVE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT+1)
371 SAVE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+1+FLT_ARG_CNT)
373 mov itmp1,%l0 /* save itmp1 */
374 mov itmp2,%l1 /* save itmp2 */
376 add %fp,JITSTACK,%o0 /* pass pseudo SP */
377 mov pv_callee,%o1 /* pass PV */
378 mov ra_callee,%o2 /* pass RA (correct for leafs) */
382 RESTORE_FLOAT_RETURN_REGISTER(CSTACK_CNT)
383 RESTORE_FLOAT_ARGUMENT_REGISTERS(CSTACK_CNT+1)
384 RESTORE_FLOAT_TEMPORARY_REGISTERS(CSTACK_CNT+1+FLT_ARG_CNT)
386 mov %l0,itmp1 /* restore itmp1 */
387 mov %l1,itmp2 /* restore itmp2 */
389 brnz %o0,L_asm_patcher_wrapper_exception
392 /* load RA (patch position from patcher data on the stack */
393 ldx [%fp+JITSTACK+5*8],itmp3
395 /* remove window and stack frame (and stack space allocated in the stub code */
396 restore %fp,6*8,%sp /* (source regs refer to old window, rd to new window) */
398 jmpl itmp3,zero /* jump to newly patched code */
401 L_asm_patcher_wrapper_exception:
402 mov %o0,xptr_itmp2 /* get exception */
403 ldx [%fp+JITSTACK+5*8],xpc_itmp3 /* xpc is RA */
404 restore %fp,6*8,%sp /* remove stack frame */
405 ba asm_handle_exception
410 /* asm_store_fp_state_reg **************************************************
412 * This function stores the 64-bit floating point state register to a *
413 * memory location. (which needs to be 8-byte aligned) *
416 * void asm_store_fp_state_reg(u8 *mem); *
418 **************************************************************************/
420 asm_store_fp_state_reg:
422 retl /* return from leaf */
425 /* asm_load_fp_state_reg ***************************************************
427 * This function loades the 64-bit floating point state register from a *
428 * memory location. (which needs to be 8-byte aligned) *
431 * void asm_load_fp_state_reg(u8 *mem); *
433 **************************************************************************/
435 asm_load_fp_state_reg:
437 retl /* return from leaf */
441 /* disable exec-stacks ********************************************************/
443 #if defined(__linux__) && defined(__ELF__)
444 .section .note.GNU-stack,"",%progbits
449 * These are local overrides for various environment variables in Emacs.
450 * Please do not remove this and leave it at the end of the file, where
451 * Emacs will automagically detect them.
452 * ---------------------------------------------------------------------
455 * indent-tabs-mode: t
459 * vim:noexpandtab:sw=4:ts=4: