1 /* src/vm/jit/x86_64/asmpart.S - Java-C interface functions for x86_64
3 Copyright (C) 1996-2005, 2006, 2007, 2008 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/x86_64/arch.h"
31 #include "vm/jit/x86_64/md-abi.h"
32 #include "vm/jit/x86_64/md-asm.h"
34 #include "vm/jit/abi-asm.h"
35 #include "vm/jit/methodheader.h"
41 /* export functions ***********************************************************/
43 .globl asm_vm_call_method
44 .globl asm_vm_call_method_int
45 .globl asm_vm_call_method_long
46 .globl asm_vm_call_method_float
47 .globl asm_vm_call_method_double
48 .globl asm_vm_call_method_exception_handler
49 .globl asm_vm_call_method_end
51 .globl asm_handle_exception
52 .globl asm_handle_nat_exception
54 .globl asm_abstractmethoderror
56 .globl asm_builtin_f2i
57 .globl asm_builtin_f2l
58 .globl asm_builtin_d2i
59 .globl asm_builtin_d2l
61 .globl asm_compare_and_swap
62 .globl asm_memory_barrier
64 .globl asm_get_cycle_count
67 /********************* function asm_calljavafunction ***************************
69 * This function calls a Java-method (which possibly needs compilation) *
70 * with up to 4 address parameters. *
72 * This functions calls the JIT-compiler which eventually translates the *
73 * method into machine code. *
76 * javaobject_header *asm_calljavamethod (methodinfo *m, *
77 * void *arg1, void *arg2, void *arg3, void *arg4); *
79 *******************************************************************************/
86 .long 0 /* frame size */
87 .quad 0 /* codeinfo pointer */
90 asm_vm_call_method_int:
91 asm_vm_call_method_long:
92 asm_vm_call_method_float:
93 asm_vm_call_method_double:
94 sub $(7*8),sp /* keep stack 16-byte aligned */
95 mov %rbx,0*8(sp) /* %rbx is not a callee saved in cacao*/
102 mov a0,6*8(sp) /* store method PV */
104 mov sp,s0 /* save stack pointer */
106 mov a1,t0 /* address of data structure */
107 mov a2,itmp1 /* number of stack arguments */
126 je L_asm_vm_call_method_stack_copy_done
129 add $1,itmp2 /* keep stack 16-byte aligned */
130 and $0xfffffffffffffffe,itmp2
131 shl $3,itmp2 /* calculate stack size */
132 sub itmp2,sp /* create stack frame */
133 mov sp,itmp2 /* temporary stack pointer */
135 L_asm_vm_call_method_stack_copy_loop:
136 mov 14*8(t0),itmp3 /* load argument */
137 mov itmp3,0(itmp2) /* store argument on stack */
139 sub $1,itmp1l /* subtract 1 argument */
140 add $8,t0 /* set address of next argument */
141 add $8,itmp2 /* increase SP */
144 jg L_asm_vm_call_method_stack_copy_loop
146 L_asm_vm_call_method_stack_copy_done:
147 lea (6*8-256)(s0),mptr /* We subtract 256 to force the next */
148 /* move instruction to have a 32-bit */
151 mov (0*8+256)(mptr),itmp3 /* load PV */
154 L_asm_vm_call_method_return:
155 mov s0,sp /* restore SP */
157 mov 0*8(sp),%rbx /* restore callee saved registers */
163 add $(7*8),sp /* free stack space */
166 asm_vm_call_method_exception_handler:
167 mov xptr,a0 /* pass exception pointer */
168 call builtin_throw_exception@PLT
169 jmp L_asm_vm_call_method_return
171 asm_vm_call_method_end:
175 /* asm_handle_exception ********************************************************
177 * This function handles an exception. It does not use the usual calling *
178 * conventions. The exception pointer is passed in REG_ITMP1 and the *
179 * pc from the exception raising position is passed in REG_ITMP2. It searches *
180 * the local exception table for a handler. If no one is found, it unwinds *
181 * stacks and continues searching the callers. *
183 *******************************************************************************/
185 asm_handle_nat_exception:
186 add $8,sp /* clear return address of native stub*/
188 asm_handle_exception:
189 L_asm_handle_exception: /* required for PIC code */
190 sub $((ARG_CNT+TMP_CNT)*8),sp /* create maybe-leaf stackframe */
192 SAVE_ARGUMENT_REGISTERS(0) /* we save arg and temp registers in */
193 SAVE_TEMPORARY_REGISTERS(ARG_CNT) /* case this is a leaf method */
195 mov $((ARG_CNT+TMP_CNT)*8),a3 /* prepare a3 for handle_exception */
196 mov $1,t0 /* set maybe-leaf flag */
198 L_asm_handle_exception_stack_loop:
200 mov xptr,0*8(sp) /* save exception pointer */
201 mov xpc,1*8(sp) /* save exception pc */
202 add sp,a3 /* calculate Java sp into a3... */
204 mov a3,3*8(sp) /* ...and save it */
205 mov t0,4*8(sp) /* save maybe-leaf flag */
207 mov xpc,a0 /* exception pc */
208 call methodtree_find@PLT
209 mov v0,2*8(sp) /* save data segment pointer */
211 mov 0*8(sp),a0 /* pass exception pointer */
212 mov 1*8(sp),a1 /* pass exception pc */
213 mov v0,a2 /* pass data segment pointer */
214 mov 3*8(sp),a3 /* pass Java stack pointer */
215 call exceptions_handle_exception@PLT
218 jz L_asm_handle_exception_not_catched
220 mov v0,xpc /* move handlerpc into xpc */
221 mov 0*8(sp),xptr /* restore exception pointer */
222 mov 4*8(sp),t0 /* get maybe-leaf flag */
223 add $(6*8),sp /* free stack frame */
225 test t0,t0 /* test for maybe-leaf flag */
226 jz L_asm_handle_exception_no_leaf
228 RESTORE_ARGUMENT_REGISTERS(0) /* if this is a leaf method, we have */
229 RESTORE_TEMPORARY_REGISTERS(ARG_CNT)/* to restore arg and temp registers */
231 add $((ARG_CNT+TMP_CNT)*8),sp /* remove maybe-leaf stackframe */
233 L_asm_handle_exception_no_leaf:
234 jmp *xpc /* jump to the handler */
236 L_asm_handle_exception_not_catched:
237 mov 0*8(sp),xptr /* restore exception pointer */
238 mov 2*8(sp),itmp3 /* restore data segment pointer */
239 mov 4*8(sp),t0 /* get maybe-leaf flag */
243 jz L_asm_handle_exception_no_leaf_stack
245 add $((ARG_CNT+TMP_CNT)*8),sp /* remove maybe-leaf stackframe */
246 xor t0,t0 /* clear the isleaf flags */
248 L_asm_handle_exception_no_leaf_stack:
249 mov FrameSize(itmp3),itmp2l /* get frame size */
250 add sp,itmp2 /* pointer to save area */
252 mov IntSave(itmp3),a0l /* a0l = saved int register count */
275 shl $3,a0l /* multiply by 8 bytes */
280 mov FltSave(itmp3),a0l /* a0l = saved flt register count */
293 movq -5*8(itmp2),%xmm11
295 movq -4*8(itmp2),%xmm12
297 movq -3*8(itmp2),%xmm13
299 movq -2*8(itmp2),%xmm14
301 movq -1*8(itmp2),%xmm15
305 mov FrameSize(itmp3),itmp2l /* get frame size */
306 add itmp2,sp /* unwind stack */
308 /* exception pointer is still set */
309 pop xpc /* the new xpc is return address */
310 sub $3,xpc /* subtract 3 bytes for call */
312 xor a3,a3 /* prepare a3 for handle_exception */
314 jmp L_asm_handle_exception_stack_loop
317 /* asm_abstractmethoderror *****************************************************
319 Creates and throws an AbstractMethodError.
321 *******************************************************************************/
323 asm_abstractmethoderror:
324 mov sp,a0 /* pass java sp */
326 mov 0*8(sp),a1 /* pass exception address */
328 call exceptions_asm_new_abstractmethoderror@PLT
329 /* exception pointer is return value */
330 pop xpc /* get exception address */
331 sub $3,xpc /* exception address is ra - 3 */
332 jmp L_asm_handle_exception
335 /* asm_builtin_x2x *************************************************************
337 * Wrapper functions for float to int corner cases *
339 *******************************************************************************/
344 SAVE_ARGUMENT_REGISTERS(0)
349 RESTORE_ARGUMENT_REGISTERS(0)
358 SAVE_ARGUMENT_REGISTERS(0)
363 RESTORE_ARGUMENT_REGISTERS(0)
372 SAVE_ARGUMENT_REGISTERS(0)
377 RESTORE_ARGUMENT_REGISTERS(0)
386 SAVE_ARGUMENT_REGISTERS(0)
391 RESTORE_ARGUMENT_REGISTERS(0)
397 /* asm_compare_and_swap ********************************************************
399 Does an atomic compare and swap. Required for the lock
402 *******************************************************************************/
404 asm_compare_and_swap:
405 mov a1,v0 /* v0 is %rax */
410 /* asm_memory_barrier **********************************************************
412 A memory barrier for the Java Memory Model.
414 *******************************************************************************/
421 /* asm_get_cycle_count *********************************************************
423 Get the current time-stamp counter from the CPU.
425 *******************************************************************************/
435 /* disable exec-stacks ********************************************************/
437 #if defined(__linux__) && defined(__ELF__)
438 .section .note.GNU-stack,"",%progbits
443 * These are local overrides for various environment variables in Emacs.
444 * Please do not remove this and leave it at the end of the file, where
445 * Emacs will automagically detect them.
446 * ---------------------------------------------------------------------
449 * indent-tabs-mode: t
453 * vim:noexpandtab:sw=4:ts=4: