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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 1067:d3c00ffccfcd
prevsrc/sh4/ia64abi.h@944:a4e31314bee1
prevsrc/sh4/ia64abi.h@1065:bc1cc0c54917
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author nkeynes
date Sun Jul 05 13:54:48 2009 +1000 (10 years ago)
permissions -rw-r--r--
last change No-op merge lxdream-mem to tip to remove head (Long since merged in
actuality)
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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( uintptr_t base, int addr_reg )
    27 {
    28     MOVL_r32_r32( addr_reg, REG_ECX );
    29     SHRL_imm_r32( 12, REG_ECX ); 
    30     MOVP_immptr_rptr( base, REG_RDI );
    31     MOVP_sib_rptr( 3, REG_RCX, REG_RDI, 0, REG_RCX );
    32 }
    34 /**
    35  * Note: clobbers ECX to make the indirect call - this isn't usually
    36  * a problem since the callee will generally clobber it anyway.
    37  * Size: 12 bytes
    38  */
    39 static inline void CALL_ptr( void *ptr )
    40 {
    41     MOVP_immptr_rptr( (uintptr_t)ptr, REG_ECX );
    42     CALL_r32(REG_ECX);
    43 }
    45 static inline void CALL1_ptr_r32( void *ptr, int arg1 )
    46 {
    47     if( arg1 != REG_ARG1 ) {
    48         MOVQ_r64_r64( arg1, REG_ARG1 );
    49     }
    50     CALL_ptr(ptr);
    51 }
    53 static inline void CALL1_r32disp_r32( int preg, uint32_t disp, int arg1 )
    54 {
    55     if( arg1 != REG_ARG1 ) {
    56         MOVQ_r64_r64( arg1, REG_ARG1 );
    57     }
    58     CALL_r32disp(preg, disp);    
    59 }
    61 static inline void CALL2_ptr_r32_r32( void *ptr, int arg1, int arg2 )
    62 {
    63     if( arg2 != REG_ARG2 ) {
    64         MOVQ_r64_r64( arg2, REG_ARG2 );
    65     }
    66     if( arg1 != REG_ARG1 ) {
    67         MOVQ_r64_r64( arg1, REG_ARG1 );
    68     }
    69     CALL_ptr(ptr);
    70 }
    72 static inline void CALL2_r32disp_r32_r32( int preg, uint32_t disp, int arg1, int arg2 )
    73 {
    74     if( arg2 != REG_ARG2 ) {
    75         MOVQ_r64_r64( arg2, REG_ARG2 );
    76     }
    77     if( arg1 != REG_ARG1 ) {
    78         MOVQ_r64_r64( arg1, REG_ARG1 );
    79     }
    80     CALL_r32disp(preg, disp);    
    81 }
    83 static inline void CALL3_r32disp_r32_r32_r32( int preg, uint32_t disp, int arg1, int arg2, int arg3 )
    84 {
    85     if( arg3 != REG_ARG3 ) {
    86         MOVQ_r64_r64( arg3, REG_ARG3 );
    87     }
    88     if( arg2 != REG_ARG2 ) {
    89         MOVQ_r64_r64( arg2, REG_ARG2 );
    90     }
    91     if( arg1 != REG_ARG1 ) {
    92         MOVQ_r64_r64( arg1, REG_ARG1 );
    93     }
    94     CALL_r32disp(preg, disp);    
    95 }
    97 /**
    98  * Emit the 'start of block' assembly. Sets up the stack frame and save
    99  * SI/DI as required
   100  */
   101 static inline void enter_block( ) 
   102 {
   103     PUSH_r32(REG_RBP);
   104     SUBQ_imms_r64( 16, REG_RSP ); 
   105 }
   107 static inline void exit_block( )
   108 {
   109     ADDQ_imms_r64( 16, REG_RSP );
   110     POP_r32(REG_RBP);
   111     RET();
   112 }
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