src/vm/jit/powerpc64/asmpart.S

   1 /* src/vm/jit/powerpc64/asmpart.S - Java-C interface functions for PowerPC64
   2
   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
   7
   8    This file is part of CACAO.
   9
  10    This program is free software.text;  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.
  14
  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.
  19
  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
  23    02110-1301, USA.
  24
  25 */
  26
  27
  28 #include "config.h"
  29
  30 #define __ASSEMBLY__
  31
  32 #include "md-abi.h"
  33 #include "md-asm.h"
  34
  35 #include "vm/jit/abi-asm.h"
  36 #include "vm/jit/methodheader.h"
  37
  38
  39 /* export functions ***********************************************************/
  40
  41         .globl asm_vm_call_method_exception_handler
  42         .globl asm_vm_call_method_end
  43
  44         .globl asm_handle_nat_exception
  45         .globl asm_handle_exception
  46
  47         .globl asm_abstractmethoderror
  48
  49         .globl asm_cacheflush
  50
  51
  52 /* asm_vm_call_method **********************************************************
  53 *                                                                              *
  54 *   This function calls a Java-method (which possibly needs compilation)       *
  55 *   with up to 4 address parameters.                                           *
  56 *                                                                              *
  57 *   This functions calls the JIT-compiler which eventually translates the      *
  58 *   method into machine code.                                                  *
  59 *                                                                              *
  60 *   C-prototype:                                                               *
  61 *    javaobject_header *asm_calljavamethod (methodinfo *m,                     *
  62 *         void *arg1, void *arg2, void *arg3, void *arg4);                     *
  63 *                                                                              *
  64 *******************************************************************************/
  65         /* this is the method header see src/vm/jit/methodheader.h */
  66
  67         .align  3
  68
  69         .long   0                           /* fltsave                            */
  70         .long   0                           /* intsave                            */
  71         .long   0                           /* isleaf                             */
  72         .long   0                           /* frame size                         */
  73         .quad   0                           /* codeinfo pointer                   */
  74
  75 #ifdef ENABLE_LIBJVM
  76
  77         .globl asm_vm_call_method
  78         .globl asm_vm_call_method_int
  79         .globl asm_vm_call_method_long
  80         .globl asm_vm_call_method_float
  81         .globl asm_vm_call_method_double
  82         .section ".opd","aw"
  83         .align 3
  84
  85         asm_vm_call_method:
  86         asm_vm_call_method_int:
  87         asm_vm_call_method_long:
  88         asm_vm_call_method_float:
  89         asm_vm_call_method_double:
  90                 .quad   .asm_vm_call_method,.TOC.@tocbase,0
  91                 .previous
  92                 .size asm_vm_call_method, 24
  93                 .type .asm_vm_call_method,@function
  94                 .globl .asm_vm_call_method
  95 #else
  96         asm_vm_call_method:
  97         .globl asm_vm_call_method
  98         asm_vm_call_method_int:
  99         .globl asm_vm_call_method_int
 100         asm_vm_call_method_long:
 101         .globl asm_vm_call_method_long
 102         asm_vm_call_method_float:
 103         .globl asm_vm_call_method_float
 104         asm_vm_call_method_double:
 105         .globl asm_vm_call_method_double
 106 #endif
 107
 108 .asm_vm_call_method:
 109 .asm_vm_call_method_int:
 110 .asm_vm_call_method_long:
 111 .asm_vm_call_method_float:
 112 .asm_vm_call_method_double:
 113         mflr    r0
 114         std     r0,LA_LR_OFFSET(sp)
 115         stdu    sp,-40*8(sp)
 116
 117         std     s0,8*8(sp)                /* save used callee saved registers     */
 118         std     a0,9*8(sp)                /* save method pointer for compiler     */
 119
 120         std     pv,11*8(sp)               /* save PV register                     */
 121
 122         std     itmp3,12*8(sp)            /* registers r14-r31 are callee saved   */
 123         stfd    ftmp1,13*8(sp)            /* registers f14-f31 are callee saved   */
 124         stfd    ftmp2,14*8(sp)
 125
 126
 127         SAVE_TEMPORARY_REGISTERS(15)
 128         mr      s0, sp                  /* save stack pointer */
 129
 130         /* a1 contains a pointer to a unit64_t structure filled with all INT_ARG_REG,
 131         followed by ADR_ARG_CNT and FLT_ARG_CNT, afterwards what else needs to be copied onto
 132         the stack
 133         a2 contains the number of additional stack slots to be copied
 134         */
 135
 136 L_register_copy:
 137         mr      t1, a1
 138         mr      t2, a2
 139
 140         ld      a0 ,  0*8(t1)
 141         ld      a1 ,  1*8(t1)
 142         ld      a2 ,  2*8(t1)
 143         ld      a3 ,  3*8(t1)
 144         ld      a4 ,  4*8(t1)
 145         ld      a5 ,  5*8(t1)
 146         ld      a6 ,  6*8(t1)
 147         ld      a7 ,  7*8(t1)
 148
 149         lfd     fa0 , 8*8(t1)
 150         lfd     fa1 , 9*8(t1)
 151         lfd     fa2 ,10*8(t1)
 152         lfd     fa3 ,11*8(t1)
 153         lfd     fa4 ,12*8(t1)
 154         lfd     fa5 ,13*8(t1)
 155         lfd     fa6 ,14*8(t1)
 156         lfd     fa7 ,15*8(t1)
 157         lfd     fa8 ,16*8(t1)
 158         lfd     fa9 ,17*8(t1)
 159         lfd     fa10,18*8(t1)
 160         lfd     fa11,19*8(t1)
 161         lfd     fa12,20*8(t1)
 162
 163         mr.     t2,t2
 164         beq L_stack_copy_done
 165
 166 L_stack_copy:
 167         addi    t1,t1,20*8              /* before first possible stack slot arg */
 168         mr      t3,t2                   /* argument counter */
 169         sldi    t2,t2,8                 /* calculate size of stack */
 170         sub     sp,sp,t2                /* increase the stack */
 171         mr      t2,sp                   /* t2 points to bottom of stack now */
 172
 173 L_stack_copy_loop:
 174         addi    t1,t1,8                 /* next possible stack slot to copy */
 175         mr.     t3,t3                   /* more stack slots to copy ? */
 176         beq     L_stack_copy_done
 177         ld      itmp3, 0(t1)
 178         std     itmp3, 0(t2)
 179         addi    t2,t2,8
 180         addi    t3,t3,-1
 181         b L_stack_copy_loop
 182
 183 L_stack_copy_done:
 184         mr      itmp1, s0               /* fake invokevirtual invocation */
 185         addi    itmp1, itmp1, 9*8       /* address of methods pv */
 186         ld      pv,0*8(itmp1)
 187         mtctr   pv
 188         bctrl
 189 1:
 190         mflr    itmp1
 191         addi    pv,itmp1,(.asm_vm_call_method - 1b)@l
 192
 193 L_asm_vm_call_method_return:
 194         mr      sp,s0                     /* restore the function's sp            */
 195
 196         ld      s0,8*8(sp)                /* restore used callee saved registers  */
 197
 198         ld      pv,11*8(sp)               /* save PV register                     */
 199
 200         ld      itmp3,12*8(sp)
 201         lfd     ftmp1,13*8(sp)            /* registers f14-f31 are callee saved   */
 202         lfd     ftmp2,14*8(sp)
 203
 204         RESTORE_TEMPORARY_REGISTERS(15)
 205
 206         ld     r0,40*8+LA_LR_OFFSET(sp)
 207         mtlr   r0
 208         addi   sp,sp,40*8
 209         blr
 210
 211 asm_vm_call_method_exception_handler:
 212         mr      r3,itmp1
 213         bl      builtin_throw_exception
 214         b       L_asm_vm_call_method_return
 215
 216 asm_vm_call_method_end:
 217         nop
 218
 219
 220 /********************* function asm_handle_exception ***************************
 221 *                                                                              *
 222 *   This function handles an exception. It does not use the usual calling      *
 223 *   conventions. The exception pointer is passed in REG_ITMP1 and the          *
 224 *   pc from the exception raising position is passed in REG_ITMP2. It searches *
 225 *   the local exception table for a handler. If no one is found, it unwinds    *
 226 *   stacks and continues searching the callers.                                *
 227 *                                                                              *
 228 *   void asm_handle_exception (exceptionptr, exceptionpc);                     *
 229 *                                                                              *
 230 *******************************************************************************/
 231
 232 asm_handle_nat_exception:
 233 L_asm_handle_nat_exception:             /* required for PIC code              */
 234 L_asm_handle_exception_stack_loop:
 235         mflr    r0
 236         addi    sp,sp,-(LA_SIZE+PA_SIZE+((4+6)*8))  /* allocate stack (+4 for darwin)     */
 237         std     xptr,LA_SIZE+PA_SIZE+(4+0)*8(sp)    /* save exception pointer             */
 238         std     xpc,LA_SIZE+PA_SIZE+(4+1)*8(sp)     /* save exception pc                  */
 239         std     r0,LA_SIZE+PA_SIZE+(4+3)*8(sp)      /* save return address                */
 240         li      itmp3,0
 241         std     itmp3,LA_SIZE+PA_SIZE+(4+4)*8(sp)   /* save maybe-leaf flag (cleared)     */
 242
 243         mr      a0,r0                       /* pass return address                */
 244         bl      md_asm_codegen_get_pv_from_pc   /* get PV from RA                 */
 245         std     v0,LA_SIZE+PA_SIZE+(4+2)*8(sp)      /* save data segment pointer          */
 246
 247         ld      a0,LA_SIZE+PA_SIZE+(4+0)*8(sp)      /* pass xptr                          */
 248         ld      a1,LA_SIZE+PA_SIZE+(4+1)*8(sp)      /* pass xpc                           */
 249         ld      a2,LA_SIZE+PA_SIZE+(4+2)*8(sp)      /* pass PV (v0 == a0)                 */
 250         addi    a3,sp,LA_SIZE+PA_SIZE+((4+6)*8)     /* pass Java SP                       */
 251
 252         b       L_asm_handle_exception_continue
 253
 254
 255 asm_handle_exception:
 256 L_asm_handle_exception:                 /* required for PIC code              */
 257         addi    sp,sp,-(ARG_CNT+TMP_CNT)*8  /* create maybe-leaf stackframe       */
 258
 259         SAVE_ARGUMENT_REGISTERS(0)          /* we save arg and temp registers in  */
 260         SAVE_TEMPORARY_REGISTERS(ARG_CNT)   /* case this is a leaf method         */
 261
 262         addi    sp,sp,-(LA_SIZE+PA_SIZE+(4+6)*8)        /* allocate stack                     */
 263         std     xptr,LA_SIZE+PA_SIZE+(4+0)*8(sp)        /* save exception pointer             */
 264         std     pv,LA_SIZE+PA_SIZE+(4+2)*8(sp)          /* save data segment pointer          */
 265         mflr    r0                                      /* save return address                */
 266         std     r0,LA_SIZE+PA_SIZE+(4+3)*8(sp)
 267         li      t0, 1
 268         std     t0, LA_SIZE+PA_SIZE+(4+4)*8(sp)         /* maybe-leaf flag */
 269
 270         mr      a0,xptr                     /* pass exception pointer             */
 271         mr      a1,xpc                      /* pass exception pc                  */
 272         mr      a2,pv                       /* pass data segment pointer          */
 273         addi    a3,sp,LA_SIZE+PA_SIZE+(ARG_CNT+TMP_CNT)*8+(4+6)*8
 274
 275
 276 L_asm_handle_exception_continue:
 277         bl      exceptions_handle_exception
 278
 279         mr.     v0,v0
 280         beq     L_asm_handle_exception_not_catched
 281
 282         mr      xpc,v0                              /* move handlerpc into xpc            */
 283         ld      xptr,LA_SIZE+PA_SIZE+(4+0)*8(sp)    /* restore exception pointer          */
 284         ld      pv,LA_SIZE+PA_SIZE+(4+2)*8(sp)      /* restore data segment pointer       */
 285         ld      r0,LA_SIZE+PA_SIZE+(4+3)*8(sp)      /* restore return address             */
 286         mtlr    r0
 287         ld      t0,LA_SIZE+PA_SIZE+(4+4)*8(sp)      /* get maybe-leaf flag                */
 288         addi    sp,sp,LA_SIZE+PA_SIZE+(4+6)*8       /* free stack frame                   */
 289
 290         mr.     t0,t0
 291         beq     L_asm_handle_exception_no_leaf
 292
 293         RESTORE_ARGUMENT_REGISTERS(0)       /* if this is a leaf method, we have  */
 294         RESTORE_TEMPORARY_REGISTERS(ARG_CNT)/* to restore arg and temp registers  */
 295
 296         addi    sp,sp,(ARG_CNT+TMP_CNT)*8   /* remove maybe-leaf stackframe       */
 297
 298 L_asm_handle_exception_no_leaf:
 299         mtctr   xpc                         /* jump to the handler                */
 300         bctr
 301
 302 L_asm_handle_exception_not_catched:
 303         ld      xptr,LA_SIZE+PA_SIZE+(4+0)*8(sp)        /* restore exception pointer          */
 304         ld      pv,LA_SIZE+PA_SIZE+(4+2)*8(sp)          /* restore data segment pointer       */
 305         ld      r0,LA_SIZE+PA_SIZE+(4+3)*8(sp)          /* restore return address             */
 306         mtlr    r0
 307         ld      t0,LA_SIZE+PA_SIZE+(4+4)*8(sp)          /* get maybe-leaf flag                */
 308         addi    sp,sp,LA_SIZE+PA_SIZE+(4+6)*8           /* free stack frame                   */
 309
 310         mr.     t0,t0
 311         beq     L_asm_handle_exception_no_leaf_stack
 312
 313         addi    sp,sp,(ARG_CNT+TMP_CNT)*8   /* remove maybe-leaf stackframe       */
 314         li      t0,0                        /* clear the maybe-leaf flag          */
 315
 316 L_asm_handle_exception_no_leaf_stack:
 317         lwz     t1,FrameSize(pv)            /* get frame size                     */
 318         add     t1,sp,t1                    /* pointer to save area               */
 319
 320         lwz     t2,IsLeaf(pv)               /* is leaf procedure                  */
 321         mr.     t2,t2
 322         bne     L_asm_handle_exception_no_ra_restore
 323
 324         ld      r0,LA_LR_OFFSET(t1)         /* restore ra                         */
 325         mtlr    r0
 326
 327 L_asm_handle_exception_no_ra_restore:
 328         mflr    xpc                         /* the new xpc is ra                  */
 329         mr      t4,xpc                      /* save RA */
 330         lwz     t2,IntSave(pv)              /* t1 = saved int register count      */
 331         bl      ex_int1
 332 ex_int1:
 333         mflr    t3                          /* t3 = current pc                    */
 334         addi    t3,t3,(ex_int2-ex_int1)@l
 335         slwi    t2,t2,2                     /* t2 = register count * 4            */
 336         subf    t3,t2,t3                    /* t3 = IntSave - t2                  */
 337         mtctr   t3
 338         bctr
 339
 340         ld      s0,-9*8(t1)
 341         ld      s1,-8*8(t1)
 342         ld      s2,-7*8(t1)
 343         ld      s3,-6*8(t1)
 344         ld      s4,-5*8(t1)
 345         ld      s5,-4*8(t1)
 346         ld      s6,-3*8(t1)
 347         ld      s7,-2*8(t1)
 348         ld      s8,-1*8(t1)
 349
 350 ex_int2:
 351         subf    t1,t2,t1                    /* t1 = t1 - register count * 4       */
 352         lwz     t2,FltSave(pv)
 353         bl      ex_flt1
 354 ex_flt1:
 355         mflr    t3
 356         addi    t3,t3,(ex_flt2-ex_flt1)@l
 357         slwi    t2,t2,2                     /* t2 = register count * 4            */
 358         subf    t3,t2,t3                    /* t3 = FltSave - t2                  */
 359         mtctr   t3
 360         bctr
 361
 362         lfd     fs0,-10*8(t1)
 363         lfd     fs1,-9*8(t1)
 364         lfd     fs2,-8*8(t1)
 365         lfd     fs3,-7*8(t1)
 366         lfd     fs4,-6*8(t1)
 367         lfd     fs5,-5*8(t1)
 368         lfd     fs6,-4*8(t1)
 369         lfd     fs7,-3*8(t1)
 370         lfd     fs8,-2*8(t1)
 371         lfd     fs9,-1*8(t1)
 372
 373 ex_flt2:
 374         mtlr    t4                                   /* restore RA */
 375         lwz     t1,FrameSize(pv)
 376         add     sp,sp,t1                             /* unwind stack */
 377         b       L_asm_handle_exception_stack_loop
 378
 379
 380 /* asm_abstractmethoderror *****************************************************
 381
 382    Creates and throws an AbstractMethodError.
 383
 384 *******************************************************************************/
 385
 386 asm_abstractmethoderror:
 387         mflr    r0
 388         std     r0,LA_LR_OFFSET(sp)
 389         stdu    sp,-LA_SIZE_ALIGNED(sp)     /* preserve linkage area              */
 390         addi    a0,sp,LA_SIZE_ALIGNED       /* pass java sp                       */
 391         mr      a1,r0                       /* pass exception address             */
 392         bl      exceptions_asm_new_abstractmethoderror
 393         ld      r0,LA_SIZE_ALIGNED+LA_LR_OFFSET(sp)
 394         mtlr    r0                          /* restore return address             */
 395         addi    sp,sp,LA_SIZE_ALIGNED
 396
 397         mr      xptr,v0                     /* get exception pointer              */
 398         mr      xpc,r0                      /* we can't use r0 directly in addi   */
 399         addi    xpc,xpc,-4                  /* exception address is ra - 4        */
 400         b       L_asm_handle_nat_exception
 401
 402
 403 /* asm_cacheflush **************************************************************
 404         assumes 128 byte cache line size.
 405         All registers used may be trashed for fun and profit.
 406 *******************************************************************************/
 407
 408         .section ".opd","aw"
 409         .align 3
 410 asm_cacheflush:
 411                 .quad   .asm_cacheflush,.TOC.@tocbase,0
 412                 .previous
 413                 .size asm_cacheflush, 24
 414                 .type .asm_cacheflush,@function
 415                 .globl .asm_cacheflush
 416 .asm_cacheflush:
 417         /* construct the AND mask */
 418         li      r6,   0xffffffffffff8000
 419         ori     r6,r6,0x000000000000ff80
 420
 421         add     r4,r3,r4
 422         and.    r3,r3,r6
 423         addi    r4,r4,127
 424         and.    r4,r4,r6
 425         mr      r5,r3
 426 1:
 427         cmpld   r3,r4
 428         bge     0f
 429         dcbst   0,r3
 430         addi    r3,r3,128
 431         b       1b
 432 0:
 433         sync
 434 1:
 435         cmpld   r5,r4
 436         bge     0f
 437         icbi    0,r5
 438         addi    r5,r5,128
 439         b       1b
 440 0:
 441         sync
 442         isync
 443         blr
 444
 445
 446 /* disable exec-stacks ********************************************************/
 447
 448 #if defined(__linux__) && defined(__ELF__)
 449         .section .note.GNU-stack,"",%progbits
 450 #endif
 451
 452
 453 /*
 454  * These are local overrides for various environment variables in Emacs.
 455  * Please do not remove this and leave it at the end of the file, where
 456  * Emacs will automagically detect them.
 457  * ---------------------------------------------------------------------
 458  * Local variables:
 459  * mode: asm
 460  * indent-tabs-mode: t
 461  * c-basic-offset: 4
 462  * tab-width: 4
 463  * End:
 464  * vim:noexpandtab:sw=4:ts=4:
 465  */