Search
lxdream.org :: lxdream/src/sh4/ia64abi.h
lxdream 0.9.1
released Jun 29
Download Now
filename src/sh4/ia64abi.h
changeset 736:a02d1475ccfd
prev670:5d277b7ad0df
next800:0d1be79c9b33
author nkeynes
date Mon Jul 14 07:44:42 2008 +0000 (12 years ago)
permissions -rw-r--r--
last change Re-indent everything consistently
Fix include guards for consistency as well
view annotate diff log raw
     1 /**
     2  * $Id$
     3  * 
     4  * Provides the implementation for the AMD64 ABI (eg prologue, epilogue, and
     5  * calling conventions)
     6  *
     7  * Copyright (c) 2007 Nathan Keynes.
     8  *
     9  * This program is free software; you can redistribute it and/or modify
    10  * it under the terms of the GNU General Public License as published by
    11  * the Free Software Foundation; either version 2 of the License, or
    12  * (at your option) any later version.
    13  *
    14  * This program is distributed in the hope that it will be useful,
    15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    17  * GNU General Public License for more details.
    18  */
    20 #ifndef lxdream_ia64abi_H
    21 #define lxdream_ia64abi_H 1
    23 #include <unwind.h>
    25 #define load_ptr( reg, ptr ) load_imm64( reg, (uint64_t)ptr );
    27 /**
    28  * Note: clobbers EAX to make the indirect call - this isn't usually
    29  * a problem since the callee will usually clobber it anyway.
    30  * Size: 12 bytes
    31  */
    32 #define CALL_FUNC0_SIZE 12
    33 static inline void call_func0( void *ptr )
    34 {
    35     load_imm64(R_EAX, (uint64_t)ptr);
    36     CALL_r32(R_EAX);
    37 }
    39 #define CALL_FUNC1_SIZE 14
    40 static inline void call_func1( void *ptr, int arg1 )
    41 {
    42     MOV_r32_r32(arg1, R_EDI);
    43     call_func0(ptr);
    44 }
    46 #define CALL_FUNC2_SIZE 16
    47 static inline void call_func2( void *ptr, int arg1, int arg2 )
    48 {
    49     MOV_r32_r32(arg1, R_EDI);
    50     MOV_r32_r32(arg2, R_ESI);
    51     call_func0(ptr);
    52 }
    54 #define MEM_WRITE_DOUBLE_SIZE 35
    55 /**
    56  * Write a double (64-bit) value into memory, with the first word in arg2a, and
    57  * the second in arg2b
    58  */
    59 static inline void MEM_WRITE_DOUBLE( int addr, int arg2a, int arg2b )
    60 {
    61     PUSH_r32(arg2b);
    62     PUSH_r32(addr);
    63     call_func2(sh4_write_long, addr, arg2a);
    64     POP_r32(R_EDI);
    65     POP_r32(R_ESI);
    66     ADD_imm8s_r32(4, R_EDI);
    67     call_func0(sh4_write_long);
    68 }
    70 #define MEM_READ_DOUBLE_SIZE 43
    71 /**
    72  * Read a double (64-bit) value from memory, writing the first word into arg2a
    73  * and the second into arg2b. The addr must not be in EAX
    74  */
    75 static inline void MEM_READ_DOUBLE( int addr, int arg2a, int arg2b )
    76 {
    77     REXW(); SUB_imm8s_r32( 8, R_ESP );
    78     PUSH_r32(addr);
    79     call_func1(sh4_read_long, addr);
    80     POP_r32(R_EDI);
    81     PUSH_r32(R_EAX);
    82     ADD_imm8s_r32(4, R_EDI);
    83     call_func0(sh4_read_long);
    84     MOV_r32_r32(R_EAX, arg2b);
    85     POP_r32(arg2a);
    86     REXW(); ADD_imm8s_r32( 8, R_ESP );
    87 }
    90 /**
    91  * Emit the 'start of block' assembly. Sets up the stack frame and save
    92  * SI/DI as required
    93  */
    94 void sh4_translate_begin_block( sh4addr_t pc ) 
    95 {
    96     PUSH_r32(R_EBP);
    97     /* mov &sh4r, ebp */
    98     load_ptr( R_EBP, ((uint8_t *)&sh4r) + 128 );
   100     sh4_x86.in_delay_slot = FALSE;
   101     sh4_x86.priv_checked = FALSE;
   102     sh4_x86.fpuen_checked = FALSE;
   103     sh4_x86.branch_taken = FALSE;
   104     sh4_x86.backpatch_posn = 0;
   105     sh4_x86.block_start_pc = pc;
   106     sh4_x86.tlb_on = IS_MMU_ENABLED();
   107     sh4_x86.tstate = TSTATE_NONE;
   108 }
   110 /**
   111  * Exit the block with sh4r.pc already written
   112  */
   113 void exit_block_pcset( sh4addr_t pc )
   114 {
   115     load_imm32( R_ECX, ((pc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
   116     ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) );    // 6
   117     load_spreg( R_EAX, R_PC );
   118     if( sh4_x86.tlb_on ) {
   119         call_func1(xlat_get_code_by_vma,R_EAX);
   120     } else {
   121         call_func1(xlat_get_code,R_EAX);
   122     }
   123     POP_r32(R_EBP);
   124     RET();
   125 }
   127 /**
   128  * Exit the block with sh4r.new_pc written with the target address
   129  */
   130 void exit_block_newpcset( sh4addr_t pc )
   131 {
   132     load_imm32( R_ECX, ((pc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
   133     ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) );    // 6
   134     load_spreg( R_EAX, R_NEW_PC );
   135     store_spreg( R_EAX, R_PC );
   136     if( sh4_x86.tlb_on ) {
   137         call_func1(xlat_get_code_by_vma,R_EAX);
   138     } else {
   139         call_func1(xlat_get_code,R_EAX);
   140     }
   141     POP_r32(R_EBP);
   142     RET();
   143 }
   145 #define EXIT_BLOCK_SIZE(pc) (25 + (IS_IN_ICACHE(pc)?10:CALL_FUNC1_SIZE))
   146 /**
   147  * Exit the block to an absolute PC
   148  */
   149 void exit_block( sh4addr_t pc, sh4addr_t endpc )
   150 {
   151     load_imm32( R_ECX, pc );                            // 5
   152     store_spreg( R_ECX, REG_OFFSET(pc) );               // 3
   153     if( IS_IN_ICACHE(pc) ) {
   154         REXW(); MOV_moff32_EAX( xlat_get_lut_entry(pc) );
   155     } else if( sh4_x86.tlb_on ) {
   156         call_func1(xlat_get_code_by_vma, R_ECX);
   157     } else {
   158         call_func1(xlat_get_code,R_ECX);
   159     }
   160     REXW(); AND_imm8s_r32( 0xFC, R_EAX ); // 4
   161     load_imm32( R_ECX, ((endpc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
   162     ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) );     // 6
   163     POP_r32(R_EBP);
   164     RET();
   165 }
   168 #define EXIT_BLOCK_REL_SIZE(pc)  (28 + (IS_IN_ICACHE(pc)?10:CALL_FUNC1_SIZE))
   170 /**
   171  * Exit the block to a relative PC
   172  */
   173 void exit_block_rel( sh4addr_t pc, sh4addr_t endpc )
   174 {
   175     load_imm32( R_ECX, pc - sh4_x86.block_start_pc );   // 5
   176     ADD_sh4r_r32( R_PC, R_ECX );
   177     store_spreg( R_ECX, REG_OFFSET(pc) );               // 3
   178     if( IS_IN_ICACHE(pc) ) {
   179         REXW(); MOV_moff32_EAX( xlat_get_lut_entry(GET_ICACHE_PHYS(pc)) ); // 5
   180     } else if( sh4_x86.tlb_on ) {
   181         call_func1(xlat_get_code_by_vma,R_ECX);
   182     } else {
   183         call_func1(xlat_get_code,R_ECX);
   184     }
   185     REXW(); AND_imm8s_r32( 0xFC, R_EAX ); // 4
   186     load_imm32( R_ECX, ((endpc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
   187     ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) );     // 6
   188     POP_r32(R_EBP);
   189     RET();
   190 }
   192 /**
   193  * Write the block trailer (exception handling block)
   194  */
   195 void sh4_translate_end_block( sh4addr_t pc ) {
   196     if( sh4_x86.branch_taken == FALSE ) {
   197         // Didn't exit unconditionally already, so write the termination here
   198         exit_block_rel( pc, pc );
   199     }
   200     if( sh4_x86.backpatch_posn != 0 ) {
   201         unsigned int i;
   202         // Raise exception
   203         uint8_t *end_ptr = xlat_output;
   204         MOV_r32_r32( R_EDX, R_ECX );
   205         ADD_r32_r32( R_EDX, R_ECX );
   206         ADD_r32_sh4r( R_ECX, R_PC );
   207         MOV_moff32_EAX( &sh4_cpu_period );
   208         MUL_r32( R_EDX );
   209         ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) );
   211         call_func0( sh4_raise_exception );
   212         load_spreg( R_EAX, R_PC );
   213         if( sh4_x86.tlb_on ) {
   214             call_func1(xlat_get_code_by_vma,R_EAX);
   215         } else {
   216             call_func1(xlat_get_code,R_EAX);
   217         }
   218         POP_r32(R_EBP);
   219         RET();
   221         // Exception already raised - just cleanup
   222         uint8_t *preexc_ptr = xlat_output;
   223         MOV_r32_r32( R_EDX, R_ECX );
   224         ADD_r32_r32( R_EDX, R_ECX );
   225         ADD_r32_sh4r( R_ECX, R_SPC );
   226         MOV_moff32_EAX( &sh4_cpu_period );
   227         MUL_r32( R_EDX );
   228         ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) );
   229         load_spreg( R_EDI, R_PC );
   230         if( sh4_x86.tlb_on ) {
   231             call_func0(xlat_get_code_by_vma);
   232         } else {
   233             call_func0(xlat_get_code);
   234         }
   235         POP_r32(R_EBP);
   236         RET();
   238         for( i=0; i< sh4_x86.backpatch_posn; i++ ) {
   239             uint32_t *fixup_addr = (uint32_t *)&xlat_current_block->code[sh4_x86.backpatch_list[i].fixup_offset];
   240             *fixup_addr = xlat_output - (uint8_t *)&xlat_current_block->code[sh4_x86.backpatch_list[i].fixup_offset] - 4;
   241             if( sh4_x86.backpatch_list[i].exc_code < 0 ) {
   242                 load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount );
   243                 int stack_adj = -1 - sh4_x86.backpatch_list[i].exc_code;
   244                 if( stack_adj > 0 ) { 
   245                     ADD_imm8s_r32( stack_adj*4, R_ESP );
   246                 }
   247                 int rel = preexc_ptr - xlat_output;
   248                 JMP_rel(rel);
   249             } else {
   250                 load_imm32( R_EDI, sh4_x86.backpatch_list[i].exc_code );
   251                 load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount );
   252                 int rel = end_ptr - xlat_output;
   253                 JMP_rel(rel);
   254             }
   255         }
   256     }
   257 }
   259 _Unwind_Reason_Code xlat_check_frame( struct _Unwind_Context *context, void *arg )
   260 {
   261     void *rbp = (void *)_Unwind_GetGR(context, 6);
   262     void *expect = (((uint8_t *)&sh4r) + 128 );
   263     if( rbp == expect ) { 
   264         void **result = (void **)arg;
   265         *result = (void *)_Unwind_GetIP(context);
   266         return _URC_NORMAL_STOP;
   267     }
   269     return _URC_NO_REASON;
   270 }
   272 void *xlat_get_native_pc()
   273 {
   274     struct _Unwind_Exception exc;
   276     void *result = NULL;
   277     _Unwind_Backtrace( xlat_check_frame, &result );
   278     return result;
   279 }
   281 #endif /* !lxdream_ia64abi_H */
.