1 /* src/vm/jit/s390/asmpart.S - Java-C interface functions for s390
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
30 #include "vm/jit/s390/arch.h"
31 #include "vm/jit/s390/md-abi.h"
32 #include "vm/jit/s390/md-asm.h"
34 #include "vm/jit/abi-asm.h"
35 #include "vm/jit/methodheader.h"
40 /* export functions ***********************************************************/
42 .globl asm_vm_call_method
43 .globl asm_vm_call_method_int
44 .globl asm_vm_call_method_long
45 .globl asm_vm_call_method_float
46 .globl asm_vm_call_method_double
47 .globl asm_vm_call_method_exception_handler
48 .globl asm_vm_call_method_end
50 .globl asm_call_jit_compiler
52 .globl asm_handle_exception
53 .globl asm_handle_nat_exception
55 .globl asm_abstractmethoderror
57 .globl asm_builtin_f2i
58 .globl asm_builtin_f2l
59 .globl asm_builtin_d2i
60 .globl asm_builtin_d2l
63 asm_abstractmethoderror:
74 /* Generates a PIC call.
76 * func: function to call
77 * tag: tag unique for this call to generate a label
78 * tmp: one temporary register needed for calculation
80 * The offset table used is located at the bottom of this file.
82 * Note: destroys r12. r12 MUST contain GOT for PIC calls!
84 #define CALL_PIC(func, tag) \
85 bras %r14, L_bras_##tag; /* get PC */ \
87 l %r12, L_offsets - L_bras_##tag (%r14); /* load offset to PLT */ \
88 la %r12, L_offsets - L_bras_##tag (%r12, %r14); /* load PLT address */ \
89 l %r14, L_offset_##func - L_bras_##tag (%r14); /* load offset to func */ \
90 bas %r14, 0(%r14, %r12);
92 /********************* function asm_calljavafunction ***************************
94 * This function calls a Java-method (which possibly needs compilation) *
95 * with up to 4 address parameters. *
97 * This functions calls the JIT-compiler which eventually translates the *
98 * method into machine code. *
101 * javaobject_header *asm_calljavamethod (methodinfo *m, *
102 * void *arg1, void *arg2, void *arg3, void *arg4); *
104 *******************************************************************************/
106 .long 0 /* line number table start */
107 .long 0 /* line number table size */
108 .long 0 /* fltsave */
109 .long 0 /* intsave */
111 .long 0 /* frame size */
112 .long 0 /* codeinfo pointer */
115 asm_vm_call_method_int:
116 asm_vm_call_method_long:
117 asm_vm_call_method_float:
118 asm_vm_call_method_double:
120 ahi sp, -8*4 /* allocate stack frame */
123 /* a1: data structure */
124 /* a2: number of stack arguments */
126 st s0, 0*4(sp) /* store used calle saved registers */
129 st %r12, 3*4(sp) /* %r12 is callee saved, we'll need it as GOT */
131 st a4, 5*4(sp) /* a4 is callee saved in terms of C abi */
132 std ftmp1, 6*4(sp) /* ftmp1 and ftmp2 are callees saved in terms of C abi */
136 lr s0, a1 /* data structure */
137 lr %r0, a2 /* number of stack arguments */
139 l a0, 0*8+4(s0) /* big endian */
148 lr s1, sp /* backup stack pointer */
150 ltr %r0, %r0 /* are there any stack arguments ? */
151 je L_asm_vm_call_method_stack_copy_done
152 lr %r1, %r0 /* copy number of stack arguments */
153 sll %r1, 3 /* calculate stackframe size */
154 sr sp, %r1 /* allocate stack frame */
155 lr %r1, sp /* temporary stack pointer */
157 L_asm_vm_call_method_stack_copy_loop:
159 mvc 0(8, %r1), 7*8(s0) /* copy argument */
160 ahi %r1, 8 /* increase sp */
161 ahi s0, 8 /* set address of next argument */
162 ahi %r0, -1 /* substract 1 argument */
163 jh L_asm_vm_call_method_stack_copy_loop
165 L_asm_vm_call_method_stack_copy_done:
167 la mptr, 2*4(s1) /* load method pointer */
168 l pv, 0(mptr) /* load procedure vector from method pointer */
169 basr ra, pv /* call method */
170 lr sp, s1 /* restore stack pointer */
172 L_asm_vm_call_method_return:
174 l s0, 0*4(sp) /* restore used callee saved registers */
183 ahi sp, 8*4 /* remove stackframe */
187 asm_vm_call_method_exception_handler:
191 CALL_PIC(builtin_throw_exception, avcmeh)
194 j L_asm_vm_call_method_return
196 asm_vm_call_method_end:
199 /****************** function asm_call_jit_compiler *****************************
201 * invokes the compiler for untranslated JavaVM methods. *
203 * itmp3: methodinfo pointer *
204 * itmp1: method pointer *
206 *******************************************************************************/
210 argument registers: arguments (like in JIT)
212 arguments on stack (like in JIT)
213 ------------------------------------------------------------- <- SP on entry
215 saved return address \
216 stored volatile (in terms of C ABI) floag argument registers |
217 96 stored volatile (in terms of C ABI) integer argument registers | ACJC_STACKFRAME
218 0 - 96 register save area (C ABI) /
219 -------------------------------------------------- <- SP for jit_asm_compile
222 /* This is called from a compiler stub.
223 * Arguments are already in registers and the stack is setup like in CACAO.
226 asm_call_jit_compiler:
227 L_asm_call_jit_compiler:
229 # define ACJC_STACKFRAME ((2 * 4) + (4 * 4) + (2 * 8) + 96)
231 ahi sp,-ACJC_STACKFRAME /* allocate stack space */
233 stm %r2,%r5,96(sp) /* store volatile int arg regs */
234 std %f0,96+16(sp) /* store volatile float arg regs */
236 st %r12,96+32(sp) /* store %r12, used as GOT pointer */
237 st %r14,96+36(sp) /* store return address */
241 lr a0,itmp3 /* pass methodinfo pointer */
242 lr a1,mptr /* pass method pointer */
243 la a2,ACJC_STACKFRAME(sp) /* pass java sp */
244 la a3,0(%r14) /* pass return address, make sure bit 32 is 0 */
246 CALL_PIC(jit_asm_compile, acjc)
248 lr pv, v0 /* save return value */
250 lm %r2,%r5,96(sp) /* restore volatile int arg regs */
251 ld %f0,96+16(sp) /* restore volatile float arg regs */
252 ld %f2,96+24(sp) /* restore volatile float arg regs */
255 je L_asm_call_jit_compiler_exception
257 l %r12,96+32(sp) /* restore %r12 */
258 l %r14,96+36(sp) /* restore return address */
259 ahi sp, ACJC_STACKFRAME /* remove stack frame */
261 jit_code_entry: /* label to set breakpoint on */
262 br pv /* call the method, it will return to the caller */
265 L_asm_call_jit_compiler_exception:
267 CALL_PIC(exceptions_get_and_clear_exception, acjce)
270 l xpc,96+36(sp) /* restore return address */
271 l %r12,96+32(sp) /* restore %r12 */
272 ahi sp, ACJC_STACKFRAME /* remove stack frame */
273 j L_asm_handle_nat_exception
276 /* asm_handle_exception ********************************************************
278 * This function handles an exception. It does not use the usual calling *
279 * conventions. The exception pointer is passed in REG_ITMP1 and the *
280 * pc from the exception raising position is passed in REG_ITMP2. It searches *
281 * the local exception table for a handler. If no one is found, it unwinds *
282 * stacks and continues searching the callers. *
284 *******************************************************************************/
286 asm_handle_nat_exception:
287 L_asm_handle_nat_exception:
288 /* TODO really nothing here ? */
289 asm_handle_exception:
290 L_asm_handle_exception:
292 /* a wrapper for md_handle_exception */
294 # define STACKFRAMESIZE (96 + (16 * 4) + (16 * 8) + (4 * 4))
296 # define FREGS (96 + (16 * 4))
297 # define OUT (96 + (16 * 4) + (16 * 8))
299 ahi sp, -STACKFRAMESIZE /* allocate stack frame containing the arrays */
301 /* store special registers to array */
303 st xptr, REGS+(0*4)(sp)
304 st xpc, REGS+(1*4)(sp)
305 st pv, REGS+(13*4)(sp)
306 la itmp3, STACKFRAMESIZE(sp)
307 st itmp3, REGS+(15*4)(sp)
309 /* store temporary and argument registers */
311 stm a0, a4, REGS+(2*4)(sp)
312 std %f0, FREGS+(0*8)(sp)
313 std %f1, FREGS+(1*8)(sp)
314 std %f2, FREGS+(2*8)(sp)
315 std %f3, FREGS+(3*8)(sp)
316 std %f5, FREGS+(5*8)(sp)
317 std %f7, FREGS+(7*8)(sp)
318 std %f8, FREGS+(8*8)(sp)
319 std %f9, FREGS+(9*8)(sp)
320 std %f10, FREGS+(10*8)(sp)
321 std %f11, FREGS+(11*8)(sp)
322 std %f12, FREGS+(12*8)(sp)
323 std %f13, FREGS+(13*8)(sp)
324 std %f14, FREGS+(14*8)(sp)
325 std %f15, FREGS+(15*8)(sp)
327 /* store %r12 used as GOT */
329 st %r12, REGS+(12*4)(sp)
331 /* call md_handle_exception */
337 CALL_PIC(md_handle_exception, ahe)
341 l %r12, REGS+(12*4)(sp)
343 l itmp3, OUT+(2*4)(sp) /* out[2] contains maybe leaf flag */
347 L_restore_temporary_and_argument:
349 /* if we are maybe leaf,
350 * we have to restore argument and temporary registers
353 lm a0, a4, REGS+(2*4)(sp)
354 ld %f0, FREGS+(0*8)(sp)
355 ld %f1, FREGS+(1*8)(sp)
356 ld %f2, FREGS+(2*8)(sp)
357 ld %f3, FREGS+(3*8)(sp)
358 ld %f5, FREGS+(5*8)(sp)
359 ld %f7, FREGS+(7*8)(sp)
360 ld %f8, FREGS+(8*8)(sp)
361 ld %f9, FREGS+(9*8)(sp)
362 ld %f10, FREGS+(10*8)(sp)
363 ld %f11, FREGS+(11*8)(sp)
364 ld %f12, FREGS+(12*8)(sp)
365 ld %f13, FREGS+(13*8)(sp)
366 ld %f14, FREGS+(14*8)(sp)
367 ld %f15, FREGS+(15*8)(sp)
373 /* if we are not a maybe leaf,
374 * we have to restore callee saved registers of the callee
377 l itmp3, OUT+(0*4)(sp) /* out[0] contains IntSav */
381 l s5, REGS+(12*4)(sp)
385 l s4, REGS+(11*4)(sp)
389 l s3, REGS+(10*4)(sp)
405 /* restore callee saved float registers */
407 /* there are currently none */
413 /* write new values for special registers */
415 l xptr, REGS+(0*4)(sp)
416 l xpc, REGS+(1*4)(sp)
417 l pv, REGS+(13*4)(sp)
418 l sp, REGS+(15*4)(sp)
420 br xpc /* jump to handler */
422 # undef STACKFRAMESIZE
429 /* asm_abstractmethoderror *****************************************************
431 Creates and throws an AbstractMethodError.
433 *******************************************************************************/
435 asm_abstractmethoderror:
436 mov sp,a0 /* pass java sp */
438 mov 0*8(sp),a1 /* pass exception address */
440 call exceptions_asm_new_abstractmethoderror@PLT
441 /* exception pointer is return value */
442 pop xpc /* get exception address */
443 sub $3,xpc /* exception address is ra - 3 */
444 jmp L_asm_handle_exception
448 /* Offset table for PIC calls, see CALL_PIC */
451 .long _GLOBAL_OFFSET_TABLE_ - L_offsets
452 L_offset_builtin_throw_exception:
453 .long builtin_throw_exception@PLTOFF
454 L_offset_jit_asm_compile:
455 .long jit_asm_compile@PLTOFF
456 L_offset_exceptions_get_and_clear_exception:
457 .long exceptions_get_and_clear_exception@PLTOFF
458 L_offset_md_handle_exception:
459 .long md_handle_exception@PLTOFF
463 * These are local overrides for various environment variables in Emacs.
464 * Please do not remove this and leave it at the end of the file, where
465 * Emacs will automagically detect them.
466 * ---------------------------------------------------------------------
469 * indent-tabs-mode: t
473 * vim:noexpandtab:sw=4:ts=4: