1 /* src/vm/jit/m68k/asmpart.S - Java-C interface functions for m68k
3 Copyright (C) 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/methodheader.h"
37 .globl asm_vm_call_method
38 .globl asm_vm_call_method_int
39 .globl asm_vm_call_method_long
40 .globl asm_vm_call_method_float
41 .globl asm_vm_call_method_double
42 .globl asm_vm_call_method_end
43 .globl asm_vm_call_method_exception_handler
45 .globl asm_call_jit_compiler
47 .globl asm_abstractmethoderror
49 .globl asm_handle_exception
50 .globl asm_handle_nat_exception
53 * This functions implement the C prototyped funtion
54 * java_objectheader *asm_vm_call_method(methodinfo *m, s4 vmargscount,vm_arg *vmargs);
55 * the _int, _long, _float, _double are used for different return types
57 * The function may still be uncompiled, so the jit compiler gets invoked.
62 /* this is the method header see src/vm/jit/methodheader.h */
66 .long 0 /* line number table start */
67 .long 0 /* line number table size */
71 .long 0 /* frame size */
72 .long 0 /* codeinfo pointer */
76 This method gets called with 3 arguments:
77 1st arg: addres of method to call (fake invokevirtual here)
78 2nd arg: uint64_t array of argument registers followed by stack
79 3rd arg: number of 8 byte stack slots to be copied.
81 coldifire does not use any argument registers, so just the stack has to be copied
84 asm_vm_call_method_int:
85 asm_vm_call_method_long:
86 asm_vm_call_method_float:
87 asm_vm_call_method_double:
89 #if defined(ENABLE_SOFTFLOAT)
90 addal #(-12*4),%sp /* create stackframe to save registers, and 1 slot for method invocation */
91 moveml %d2/%d3/%d4/%d5/%d6/%d7/%a2/%a3/%a4/%a5/%fp,%sp@ /* save registers */
93 /* fetch arguments from vmargs data structure */
94 movel %sp@(12*4+1*4),%a3 /* method */
95 movel %sp@(12*4+2*4),%a2 /* arg array */
96 movel %sp@(12*4+3*4),%d2 /* arg count */
98 movel %a3, %sp@(12*4) /* copy method address to stackslot */
99 leal %sp@(12*4), %a3 /* and store that address in %a3 */
101 addal #(-12*4-6*8), %sp
102 moveml %d2/%d3/%d4/%d5/%d6/%d7/%a2/%a3/%a4/%a5/%fp,%sp@ /* save registers */
103 fmovemd %fp2/%fp3/%fp4/%fp5/%fp6/%fp7,%sp@(11*4) /* save registers */
105 /* fetch arguments from vmargs data structure */
106 movel %sp@(12*4+6*8+1*4),%a3 /* method */
107 movel %sp@(12*4+6*8+2*4),%a2 /* arg array */
108 movel %sp@(12*4+6*8+3*4),%d2 /* arg count */
110 movel %a3, %sp@(11*4+6*8) /* copy method address to stackslot */
111 leal %sp@(11*4+6*8), %a3 /* and store that address in %a3 */
114 moveal %sp, %a5 /* memorize stack */
116 tstl %d2 /* do we have arguments ? */
117 beq L_asm_vm_call_method_copy_done
118 movel %d2, %d3 /* create stackframe */
119 asll #3, %d3 /* number args * 8 */
121 moveal %sp, %a4 /* %a4 is temp stack pointer */
123 L_asm_vm_call_method_copy_loop:
125 movel %d3, %a4@(0) /* copy 4 bytes */
127 movel %d3, %a4@(4) /* a whole stack slot has been copied */
132 tstl %d2 /* do we have more arguments ? */
133 beq L_asm_vm_call_method_copy_done
134 br L_asm_vm_call_method_copy_loop
137 L_asm_vm_call_method_copy_done:
138 /* now we fake method invocation as it would happen from invokevirtual */
139 /* this is needed as we patch the caller site, so we need a writeable slot */
140 /* %a3 points to the address containing the method, %a3 == REG_METHODPTR */
145 L_asm_vm_call_method_return:
146 movel %a5, %sp /* pop arguments off stack */
148 #if defined(ENABLE_SOFTFLOAT)
149 moveml %sp@, %d2/%d3/%d4/%d5/%d6/%d7/%a2/%a3/%a4/%a5/%fp /* restore registers */
150 addal #(12*4),%sp /* restore stack */
152 fmovemd %sp@(12*4), %fp2/%fp3/%fp4/%fp5/%fp6/%fp7 /* restore registers */
153 moveml %sp@, %d2/%d3/%d4/%d5/%d6/%d7/%a2/%a3/%a4/%a5/%fp /* restore registers */
154 addal #(12*4+6*8),%sp /* restore stack */
156 moveal %d0, %a0 /* XXX return value in %a0, too, gcc sometimes expects addresses in %a0, wired */
157 asm_vm_call_method_end: /* symbol needed to insert method into avl tree */
158 rts /* return to c code */
160 /* asm_vm_call_method_exception_handler ********************************************************************
162 * calls void *builtin_throw_exception(java_objectheader *xptr) when no other handler is appropiate
163 * this functions gets called indirectly from asm_handle_exception, which back then moved xptr to %a2
164 * clear software design is in the eye of the beholder.
165 ************************************************************************************************************/
166 asm_vm_call_method_exception_handler:
167 movel %a2, %sp@- /* push xptr argument */
168 jsr builtin_throw_exception
169 lea %sp@(4), %sp /* pop arg off stack */
170 jmp L_asm_vm_call_method_return
173 /* asm_call_jit_compiler ************************************************************************************
174 * Invokes compiler for untranslated java methods.
175 * C prototype: void asm_call_jit_compiler(void);
176 * BUT: this does not match reality, arguments _ARE_ passed via createcompilerstub and asm_vm_call_method...
177 * arguments passed via %a2(methodinfo) == REG_ATMP1
178 * %a3(mptr) == REG_ATMP2
179 ************************************************************************************************************/
180 asm_call_jit_compiler:
181 addal #(-4*4),%sp /* create stackframe to save registers */
182 moveml %a0/%a1/%d0/%d1,%sp@ /* save volatile registers */
183 #if !defined(ENABLE_SOFTFLOAT)
185 fmovemd %fp0/%fp1, %sp@
186 movel %sp@(8*4), %sp@-
189 movel %sp@(4*4), %sp@- /* push arguments onto stack (ra)*/
190 pea %sp@(4*4+8) /* the old stack pointer*/
192 movel %a3,%sp@- /* mptr */
193 movel %a2,%sp@- /* methodinfo */
195 /* C prototype: u1 *jit_asm_compile(methodinfo *m, u1 *mptr, u1 *sp, u1 *ra); */
196 jsr jit_asm_compile /* invoke compiler */
197 addal #(4*4),%sp /* pop arguments off stack */
198 moveal %d0, %a2 /* to tmp register */
200 #if !defined(ENABLE_SOFTFLOAT)
201 fmovemd %sp@, %fp0/%fp1
205 moveml %sp@,%a0/%a1/%d0/%d1 /* restore volatile registers */
206 addal #(4*4),%sp /* remove stackframe */
208 tstl %a2 /* check for exception */
209 beq L_asm_call_jit_compiler_exception
211 jmp %a2@ /* invoke java method */
212 jsr 0 /* we should not ever return here */
214 L_asm_call_jit_compiler_exception:
215 jsr exceptions_get_and_clear_exception /* exception object in %d0 now */
216 moveal %d0, %a2 /* move exception object into sptr register */
217 moveal %sp@+, %a3 /* pop return address into exception address reg */
218 jmp asm_handle_exception /* handle exception */
222 asm_abstractmethoderror:
224 /* asm_handle_exception ********************************************************
226 * This function handles an exception. It does not use the usual calling *
227 * conventions. The exception pointer is passed in REG_ATMP1 and the *
228 * pc from the exception raising position is passed in REG_ATMP2. It searches *
229 * the local exception table for a handler. If no one is found, it unwinds *
230 * stacks and continues searching the callers. *
232 * void asm_handle_exception (void);
233 * exception object pointer...%a2 exception raising address...%a3 *
235 *******************************************************************************/
236 asm_handle_nat_exception:
238 asm_handle_exception:
239 L_asm_handle_exception_stack_loop:
240 /* save temporary registers */
245 #if !defined(ENABLE_SOFTFLOAT)
247 fmovemd %fp0, %sp@(0)
248 fmovemd %fp1, %sp@(8)
251 /* we need the dseg, figure it out */
252 movel %a3, %sp@- /* push ra argument */
253 jsr md_codegen_get_pv_from_pc /* pv in %d0 now */
254 movel %d0, %d2 /* move to safe register */
255 lea %sp@(4), %sp /* pop args off stack */
257 /* now call the following c function */
258 /* u1 *exceptions_handle_exception(java_objectheader *xptr, u1 *xpc, u1 *pv, u1 *sp) */
259 #if !defined(ENABLE_SOFTFLOAT)
267 jsr exceptions_handle_exception /* %d0 is address of handler or 0 when not catched */
268 lea %sp@(4*4), %sp /* pop args off stack */
270 beq L_asm_handle_exception_not_catched
272 /* %d0 contains address of exception handler */
275 /* restore temporary registers */
280 #if !defined(ENABLE_SOFTFLOAT)
281 fmovemd %fp0, %sp@(0)
282 fmovemd %fp1, %sp@(8)
288 L_asm_handle_exception_not_catched:
289 /* we did not find an exception handler in this stackframe */
290 /* remove this frame and search in the one above */
291 /* %a2 containts exception object ptr, %d2 the actual pv */
293 /* remove temporary registers stored */
294 #if !defined(ENABLE_SOFTFLOAT)
295 addal #4*4 + 8*2, %sp
301 movel %a3@(FrameSize), %d2
304 addal %d2, %a0 /* %a0 now points to top of stackframe, where saved regs are */
306 /* the saved registers have to be restored */
307 /* XXX ugly hack: intsave and adrsave share one field */
308 movel %a3@(IntSave), %d0
309 andil #0x0000ffff, %d0 /* this is IntSave */
311 beq L_asm_handle_ex_int_done
315 beq L_asm_handle_ex_int_done
319 beq L_asm_handle_ex_int_done
322 L_asm_handle_ex_int_done:
324 movel %a3@(IntSave), %d0
325 andil #0xffff0000, %d0 /* this is AdrSave */
331 beq L_asm_handle_ex_adr_done
335 beq L_asm_handle_ex_adr_done
339 beq L_asm_handle_ex_adr_done
343 L_asm_handle_ex_adr_done:
345 #if !defined(ENABLE_SOFTFLOAT)
346 movel %a3@(FltSave), %d0
348 beq L_asm_handle_ex_flt_done
349 fmovemd %a0@(-8), %fp7
352 beq L_asm_handle_ex_flt_done
353 fdmoved %a0@(-16), %fp6
356 beq L_asm_handle_ex_flt_done
357 fdmoved %a0@(-24), %fp5
359 L_asm_handle_ex_flt_done:
363 addal %d2, %sp /* remove old stackframe */
364 moveal %sp@+, %a3 /* make return address, new exception rasing address */
365 subal #2, %a3 /* it was a jsr %aX, which is 4 bytes long */
366 jmp L_asm_handle_exception_stack_loop
374 * These are local overrides for various environment variables in Emacs.
375 * Please do not remove this and leave it at the end of the file, where
376 * Emacs will automagically detect them.
377 * ---------------------------------------------------------------------
380 * indent-tabs-mode: t
384 * vim:noexpandtab:sw=4:ts=4: