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_replacement_out
58 .globl asm_replacement_in
60 .globl asm_builtin_f2i
61 .globl asm_builtin_f2l
62 .globl asm_builtin_d2i
63 .globl asm_builtin_d2l
66 asm_abstractmethoderror:
81 /* Generates a PIC call.
83 * func: function to call
84 * tag: tag unique for this call to generate a label
85 * tmp: one temporary register needed for calculation
87 * The offset table used is located at the bottom of this file.
89 * Note: destroys r12/itmp2. r12 MUST contain GOT for PIC calls!
91 #define CALL_PIC(func, tag) \
92 bras %r14, L_bras_##tag; /* get PC */ \
94 l %r12, L_offsets - L_bras_##tag (%r14); /* load offset to PLT */ \
95 la %r12, L_offsets - L_bras_##tag (%r12, %r14); /* load PLT address */ \
96 l %r14, L_offset_##func - L_bras_##tag (%r14); /* load offset to func */ \
97 bas %r14, 0(%r14, %r12);
99 /********************* function asm_calljavafunction ***************************
101 * This function calls a Java-method (which possibly needs compilation) *
102 * with up to 4 address parameters. *
104 * This functions calls the JIT-compiler which eventually translates the *
105 * method into machine code. *
108 * javaobject_header *asm_calljavamethod (methodinfo *m, *
109 * void *arg1, void *arg2, void *arg3, void *arg4); *
111 *******************************************************************************/
113 .long 0 /* catch type all */
114 .long 0 /* exception handler pc */
116 .long 0 /* start pc */
117 .long 1 /* extable size */
118 .long 0 /* line number table start */
119 .long 0 /* line number table size */
120 .long 0 /* fltsave */
121 .long 0 /* intsave */
124 .long 0 /* frame size */
125 .long 0 /* codeinfo pointer */
128 asm_vm_call_method_int:
129 asm_vm_call_method_long:
130 asm_vm_call_method_float:
131 asm_vm_call_method_double:
133 ahi sp, -8*4 /* allocate stack frame */
136 /* a1: data structure */
137 /* a2: number of stack arguments */
139 st s0, 0*4(sp) /* store used calle saved registers */
142 st mptr, 3*4(sp) /* mptr/itmp2 is callee saved in terms of C abi */
144 st a4, 5*4(sp) /* a4 is callee saved in terms of C abi */
147 lr s0, a1 /* data structure */
148 lr %r0, a2 /* number of stack arguments */
150 l a0, 0*8+4(s0) /* big endian */
159 lr s1, sp /* backup stack pointer */
161 ltr %r0, %r0 /* are there any stack arguments ? */
162 je L_asm_vm_call_method_stack_copy_done
163 lr %r1, %r0 /* copy number of stack arguments */
164 sll %r1, 3 /* calculate stackframe size */
165 sr sp, %r1 /* allocate stack frame */
166 lr %r1, sp /* temporary stack pointer */
168 L_asm_vm_call_method_stack_copy_loop:
170 mvc 0(8, %r1), 7*8(s0) /* copy argument */
171 ahi %r1, 8 /* increase sp */
172 ahi s0, 8 /* set address of next argument */
173 ahi %r0, -1 /* substract 1 argument */
174 jh L_asm_vm_call_method_stack_copy_loop
176 L_asm_vm_call_method_stack_copy_done:
178 la mptr, 2*4(s1) /* load method pointer */
179 l pv, 0(mptr) /* load procedure vector from method pointer */
180 basr ra, pv /* call method */
181 lr sp, s1 /* restore stack pointer */
183 L_asm_vm_call_method_return:
185 l s0, 0*4(sp) /* restore used callee saved registers */
192 ahi sp, 8*4 /* remove stackframe */
196 asm_vm_call_method_exception_handler:
200 CALL_PIC(builtin_throw_exception, avcmeh)
203 j L_asm_vm_call_method_return
205 asm_vm_call_method_end:
208 /****************** function asm_call_jit_compiler *****************************
210 * invokes the compiler for untranslated JavaVM methods. *
212 * itmp1: methodinfo pointer *
213 * itmp2: method pointer *
215 *******************************************************************************/
219 argument registers: arguments (like in JIT)
221 arguments on stack (like in JIT)
222 ------------------------------------------------------------- <- SP on entry
224 saved return address \
225 stored volatile (in terms of C ABI) floag argument registers |
226 96 stored volatile (in terms of C ABI) integer argument registers | ACJC_STACKFRAME
227 0 - 96 register save area (C ABI) /
228 -------------------------------------------------- <- SP for jit_asm_compile
231 /* This is called from a compiler stub.
232 * Arguments are already in registers and the stack is setup like in CACAO.
235 asm_call_jit_compiler:
236 L_asm_call_jit_compiler:
238 # define ACJC_STACKFRAME (4 + (4 * 4) + (2 * 8) + 96 + 4)
240 ahi sp,-ACJC_STACKFRAME /* allocate stack space */
242 stm %r2,%r5,96(sp) /* store volatile int arg regs */
243 std %f0,96+16(sp) /* store volatile float arg regs */
245 st %r14,96+32(sp) /* store return address */
249 lr a0,itmp1 /* pass methodinfo pointer */
250 lr a1,itmp2 /* pass method pointer */
251 la a2,ACJC_STACKFRAME(sp) /* pass java sp */
252 la a3,0(%r14) /* pass return address, make sure bit 32 is 0 */
254 CALL_PIC(jit_asm_compile, acjc)
256 lr pv, v0 /* save return value */
258 lm %r2,%r5,96(sp) /* restore volatile int arg regs */
259 ld %f0,96+16(sp) /* restore volatile float arg regs */
260 ld %f2,96+24(sp) /* restore volatile float arg regs */
263 je L_asm_call_jit_compiler_exception
265 l %r14,96+32(sp) /* restore return address */
266 ahi sp, ACJC_STACKFRAME /* remove stack frame */
268 jit_code_entry: /* label to set breakpoint on */
269 br pv /* call the method, it will return to the caller */
272 L_asm_call_jit_compiler_exception:
274 CALL_PIC(exceptions_get_and_clear_exception, acjce)
277 l xpc,96+32(sp) /* restore return address */
278 ahi sp, ACJC_STACKFRAME /* remove stack frame */
279 j L_asm_handle_nat_exception
282 /* asm_handle_exception ********************************************************
284 * This function handles an exception. It does not use the usual calling *
285 * conventions. The exception pointer is passed in REG_ITMP1 and the *
286 * pc from the exception raising position is passed in REG_ITMP2. It searches *
287 * the local exception table for a handler. If no one is found, it unwinds *
288 * stacks and continues searching the callers. *
290 *******************************************************************************/
292 asm_handle_nat_exception:
293 L_asm_handle_nat_exception:
294 /* TODO really nothing here ? */
295 asm_handle_exception:
296 L_asm_handle_exception:
298 /* a wrapper for md_handle_exception */
300 # define STACKFRAMESIZE (96 + (16 * 4) + (16 * 8) + (4 * 4))
302 # define FREGS (96 + (16 * 4))
303 # define OUT (96 + (16 * 4) + (16 * 8))
305 ahi sp, -STACKFRAMESIZE /* allocate stack frame containing the arrays */
307 /* store special registers to array */
309 st xptr, REGS+(1*4)(sp)
310 st xpc, REGS+(12*4)(sp)
311 st pv, REGS+(13*4)(sp)
312 la itmp3, STACKFRAMESIZE(sp)
313 st itmp3, REGS+(15*4)(sp)
315 /* store temporary and argument registers */
317 stm a0, a4, REGS+(2*4)(sp)
318 std %f0, FREGS+(0*8)(sp)
319 std %f1, FREGS+(1*8)(sp)
320 std %f2, FREGS+(2*8)(sp)
321 std %f3, FREGS+(3*8)(sp)
322 std %f5, FREGS+(5*8)(sp)
323 std %f7, FREGS+(7*8)(sp)
324 std %f8, FREGS+(8*8)(sp)
325 std %f9, FREGS+(9*8)(sp)
326 std %f10, FREGS+(10*8)(sp)
327 std %f11, FREGS+(11*8)(sp)
328 std %f12, FREGS+(12*8)(sp)
329 std %f13, FREGS+(13*8)(sp)
330 std %f14, FREGS+(14*8)(sp)
331 std %f15, FREGS+(15*8)(sp)
333 /* call md_handle_exception */
339 CALL_PIC(md_handle_exception, ahe)
341 l itmp3, OUT+(2*4)(sp) /* out[2] contains maybe leaf flag */
345 L_restore_temporary_and_argument:
347 /* if we are maybe leaf,
348 * we have to restore argument and temporary registers
351 lm a0, a4, REGS+(2*4)(sp)
352 ld %f0, FREGS+(0*8)(sp)
353 ld %f1, FREGS+(1*8)(sp)
354 ld %f2, FREGS+(2*8)(sp)
355 ld %f3, FREGS+(3*8)(sp)
356 ld %f5, FREGS+(5*8)(sp)
357 ld %f7, FREGS+(7*8)(sp)
358 ld %f8, FREGS+(8*8)(sp)
359 ld %f9, FREGS+(9*8)(sp)
360 ld %f10, FREGS+(10*8)(sp)
361 ld %f11, FREGS+(11*8)(sp)
362 ld %f12, FREGS+(12*8)(sp)
363 ld %f13, FREGS+(13*8)(sp)
364 ld %f14, FREGS+(14*8)(sp)
365 ld %f15, FREGS+(15*8)(sp)
371 /* if we are not a maybe leaf,
372 * we have to restore callee saved registers of the callee
375 l itmp3, OUT+(0*4)(sp) /* out[0] contains IntSav */
379 l s4, REGS+(11*4)(sp)
383 l s3, REGS+(10*4)(sp)
399 /* restore callee saved float registers */
401 l itmp3, OUT+(1*4)(sp) /* out[1] contains FltSav */
405 ld %f6, FREGS+(6*8)(sp)
409 ld %f4, FREGS+(4*8)(sp)
415 /* write new values for special registers */
417 l xptr, REGS+(1*4)(sp)
418 l xpc, REGS+(12*4)(sp)
419 l pv, REGS+(13*4)(sp)
420 l sp, REGS+(15*4)(sp)
422 br xpc /* jump to handler */
424 # undef STACKFRAMESIZE
431 /* asm_abstractmethoderror *****************************************************
433 Creates and throws an AbstractMethodError.
435 *******************************************************************************/
437 asm_abstractmethoderror:
438 mov sp,a0 /* pass java sp */
440 mov 0*8(sp),a1 /* pass exception address */
442 call exceptions_asm_new_abstractmethoderror@PLT
443 /* exception pointer is return value */
444 pop xpc /* get exception address */
445 sub $3,xpc /* exception address is ra - 3 */
446 jmp L_asm_handle_exception
450 /* Offset table for PIC calls, see CALL_PIC */
453 .long _GLOBAL_OFFSET_TABLE_ - L_offsets
454 L_offset_builtin_throw_exception:
455 .long builtin_throw_exception@PLTOFF
456 L_offset_jit_asm_compile:
457 .long jit_asm_compile@PLTOFF
458 L_offset_exceptions_get_and_clear_exception:
459 .long exceptions_get_and_clear_exception@PLTOFF
460 L_offset_md_handle_exception:
461 .long md_handle_exception@PLTOFF
465 * These are local overrides for various environment variables in Emacs.
466 * Please do not remove this and leave it at the end of the file, where
467 * Emacs will automagically detect them.
468 * ---------------------------------------------------------------------
471 * indent-tabs-mode: t
475 * vim:noexpandtab:sw=4:ts=4: