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lxdream.org :: lxdream/src/xlat/x86/amd64abi.h
lxdream 0.9.1
released Jun 29
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filename src/xlat/x86/amd64abi.h
changeset 995:eb9d43e8aa08
prev992:7c15f8a71995
next1004:eae001858134
author nkeynes
date Thu Mar 05 21:42:35 2009 +0000 (13 years ago)
permissions -rw-r--r--
last change Cleanup ABI headers - most of the content made consistent between versions, and moved into sh4x86.in proper
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     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 #define REG_ARG1 REG_RDI
    21 #define REG_ARG2 REG_RSI
    22 #define REG_ARG3 REG_RDX
    23 #define REG_RESULT1 REG_RAX
    24 #define MAX_REG_ARG 3  /* There's more, but we don't use more than 3 here anyway */
    26 static inline void decode_address( int addr_reg )
    27 {
    28     uintptr_t base = (sh4r.xlat_sh4_mode&SR_MD) ? (uintptr_t)sh4_address_space : (uintptr_t)sh4_user_address_space;
    29     MOVL_r32_r32( addr_reg, REG_ECX );
    30     SHRL_imm_r32( 12, REG_ECX ); 
    31     MOVP_immptr_rptr( base, REG_RDI );
    32     MOVP_sib_rptr( 3, REG_RCX, REG_RDI, 0, REG_RCX );
    33 }
    35 /**
    36  * Note: clobbers ECX to make the indirect call - this isn't usually
    37  * a problem since the callee will generally clobber it anyway.
    38  * Size: 12 bytes
    39  */
    40 static inline void CALL_ptr( void *ptr )
    41 {
    42     MOVP_immptr_rptr( (uintptr_t)ptr, REG_ECX );
    43     CALL_r32(REG_ECX);
    44 }
    46 static inline void CALL1_ptr_r32( void *ptr, int arg1 )
    47 {
    48     if( arg1 != REG_ARG1 ) {
    49         MOVQ_r64_r64( arg1, REG_ARG1 );
    50     }
    51     CALL_ptr(ptr);
    52 }
    54 static inline void CALL1_r32disp_r32( int preg, uint32_t disp, int arg1 )
    55 {
    56     if( arg1 != REG_ARG1 ) {
    57         MOVQ_r64_r64( arg1, REG_ARG1 );
    58     }
    59     CALL_r32disp(preg, disp);    
    60 }
    62 static inline void CALL2_ptr_r32_r32( void *ptr, int arg1, int arg2 )
    63 {
    64     if( arg2 != REG_ARG2 ) {
    65         MOVQ_r64_r64( arg2, REG_ARG2 );
    66     }
    67     if( arg1 != REG_ARG1 ) {
    68         MOVQ_r64_r64( arg1, REG_ARG1 );
    69     }
    70     CALL_ptr(ptr);
    71 }
    73 static inline void CALL2_r32disp_r32_r32( int preg, uint32_t disp, int arg1, int arg2 )
    74 {
    75     if( arg2 != REG_ARG2 ) {
    76         MOVQ_r64_r64( arg2, REG_ARG2 );
    77     }
    78     if( arg1 != REG_ARG1 ) {
    79         MOVQ_r64_r64( arg1, REG_ARG1 );
    80     }
    81     CALL_r32disp(preg, disp);    
    82 }
    84 static inline void CALL3_r32disp_r32_r32_r32( int preg, uint32_t disp, int arg1, int arg2, int arg3 )
    85 {
    86     if( arg3 != REG_ARG3 ) {
    87         MOVQ_r64_r64( arg3, REG_ARG3 );
    88     }
    89     if( arg2 != REG_ARG2 ) {
    90         MOVQ_r64_r64( arg2, REG_ARG2 );
    91     }
    92     if( arg1 != REG_ARG1 ) {
    93         MOVQ_r64_r64( arg1, REG_ARG1 );
    94     }
    95     CALL_r32disp(preg, disp);    
    96 }
    98 /**
    99  * Emit the 'start of block' assembly. Sets up the stack frame and save
   100  * SI/DI as required
   101  */
   102 static inline void enter_block( ) 
   103 {
   104     PUSH_r32(REG_RBP);
   105     MOVP_immptr_rptr( ((uint8_t *)&sh4r) + 128, REG_EBP );
   106     SUBQ_imms_r64( 16, REG_RSP ); 
   107 }
   109 static inline void exit_block( )
   110 {
   111     ADDQ_imms_r64( 16, REG_RSP );
   112     POP_r32(REG_RBP);
   113     RET();
   114 }
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