nkeynes@539 | 1 | /**
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nkeynes@586 | 2 | * $Id$
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nkeynes@539 | 3 | *
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nkeynes@736 | 4 | * Provides the implementation for the AMD64 ABI (eg prologue, epilogue, and
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nkeynes@539 | 5 | * calling conventions)
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nkeynes@539 | 6 | *
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nkeynes@539 | 7 | * Copyright (c) 2007 Nathan Keynes.
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nkeynes@539 | 8 | *
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nkeynes@539 | 9 | * This program is free software; you can redistribute it and/or modify
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nkeynes@539 | 10 | * it under the terms of the GNU General Public License as published by
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nkeynes@539 | 11 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@539 | 12 | * (at your option) any later version.
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nkeynes@539 | 13 | *
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nkeynes@539 | 14 | * This program is distributed in the hope that it will be useful,
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nkeynes@539 | 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@539 | 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@539 | 17 | * GNU General Public License for more details.
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nkeynes@539 | 18 | */
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nkeynes@539 | 19 |
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nkeynes@736 | 20 | #ifndef lxdream_ia64abi_H
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nkeynes@736 | 21 | #define lxdream_ia64abi_H 1
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nkeynes@539 | 22 |
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nkeynes@586 | 23 | #include <unwind.h>
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nkeynes@539 | 24 |
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nkeynes@539 | 25 | #define load_ptr( reg, ptr ) load_imm64( reg, (uint64_t)ptr );
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nkeynes@736 | 26 |
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nkeynes@930 | 27 | static inline decode_address( int addr_reg )
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nkeynes@930 | 28 | {
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nkeynes@930 | 29 | MOV_r32_r32( addr_reg, R_ECX );
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nkeynes@930 | 30 | SHR_imm8_r32( 12, R_ECX );
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nkeynes@930 | 31 | load_ptr( R_EDI, sh4_address_space );
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nkeynes@930 | 32 | REXW(); OP(0x8B); OP(0x0C); OP(0xCF); // mov.q [%rdi + %rcx*8], %rcx
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nkeynes@930 | 33 | }
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nkeynes@930 | 34 |
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nkeynes@539 | 35 | /**
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nkeynes@539 | 36 | * Note: clobbers EAX to make the indirect call - this isn't usually
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nkeynes@539 | 37 | * a problem since the callee will usually clobber it anyway.
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nkeynes@539 | 38 | * Size: 12 bytes
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nkeynes@539 | 39 | */
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nkeynes@539 | 40 | #define CALL_FUNC0_SIZE 12
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nkeynes@539 | 41 | static inline void call_func0( void *ptr )
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nkeynes@539 | 42 | {
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nkeynes@539 | 43 | load_imm64(R_EAX, (uint64_t)ptr);
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nkeynes@539 | 44 | CALL_r32(R_EAX);
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nkeynes@539 | 45 | }
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nkeynes@539 | 46 |
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nkeynes@539 | 47 | #define CALL_FUNC1_SIZE 14
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nkeynes@539 | 48 | static inline void call_func1( void *ptr, int arg1 )
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nkeynes@539 | 49 | {
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nkeynes@800 | 50 | REXW(); MOV_r32_r32(arg1, R_EDI);
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nkeynes@539 | 51 | call_func0(ptr);
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nkeynes@539 | 52 | }
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nkeynes@539 | 53 |
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nkeynes@927 | 54 | static inline void call_func1_exc( void *ptr, int arg1, int pc )
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nkeynes@927 | 55 | {
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nkeynes@927 | 56 | REXW(); MOV_r32_r32(arg1, R_EDI);
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nkeynes@927 | 57 | load_exc_backpatch(R_ESI);
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nkeynes@927 | 58 | call_func0(ptr);
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nkeynes@927 | 59 | }
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nkeynes@927 | 60 |
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nkeynes@930 | 61 | static inline void call_func1_r32disp8( int preg, uint32_t disp8, int arg1 )
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nkeynes@930 | 62 | {
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nkeynes@930 | 63 | REXW(); MOV_r32_r32(arg1, R_EDI);
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nkeynes@930 | 64 | CALL_r32disp8(preg, disp8);
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nkeynes@930 | 65 | }
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nkeynes@930 | 66 |
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nkeynes@939 | 67 | static inline void call_func1_r32disp8_exc( int preg, uint32_t disp8, int arg1, int pc )
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nkeynes@939 | 68 | {
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nkeynes@939 | 69 | REXW(); MOV_r32_r32(arg1, R_EDI);
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nkeynes@939 | 70 | load_exc_backpatch(R_ESI);
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nkeynes@939 | 71 | CALL_r32disp8(preg, disp8);
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nkeynes@939 | 72 | }
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nkeynes@939 | 73 |
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nkeynes@539 | 74 | #define CALL_FUNC2_SIZE 16
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nkeynes@539 | 75 | static inline void call_func2( void *ptr, int arg1, int arg2 )
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nkeynes@539 | 76 | {
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nkeynes@800 | 77 | REXW(); MOV_r32_r32(arg1, R_EDI);
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nkeynes@800 | 78 | REXW(); MOV_r32_r32(arg2, R_ESI);
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nkeynes@539 | 79 | call_func0(ptr);
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nkeynes@539 | 80 | }
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nkeynes@539 | 81 |
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nkeynes@930 | 82 | static inline void call_func2_r32disp8( int preg, uint32_t disp8, int arg1, int arg2 )
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nkeynes@930 | 83 | {
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nkeynes@930 | 84 | REXW(); MOV_r32_r32(arg1, R_EDI);
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nkeynes@930 | 85 | REXW(); MOV_r32_r32(arg2, R_ESI);
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nkeynes@930 | 86 | CALL_r32disp8(preg, disp8);
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nkeynes@930 | 87 | }
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nkeynes@930 | 88 |
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nkeynes@939 | 89 | static inline void call_func2_r32disp8_exc( int preg, uint32_t disp8, int arg1, int arg2, int pc )
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nkeynes@539 | 90 | {
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nkeynes@939 | 91 | REXW(); MOV_r32_r32(arg1, R_EDI);
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nkeynes@939 | 92 | REXW(); MOV_r32_r32(arg2, R_ESI);
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nkeynes@939 | 93 | load_exc_backpatch(R_EDX);
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nkeynes@939 | 94 | CALL_r32disp8(preg, disp8);
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nkeynes@539 | 95 | }
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nkeynes@539 | 96 |
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nkeynes@539 | 97 |
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nkeynes@539 | 98 |
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nkeynes@539 | 99 | /**
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nkeynes@539 | 100 | * Emit the 'start of block' assembly. Sets up the stack frame and save
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nkeynes@539 | 101 | * SI/DI as required
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nkeynes@539 | 102 | */
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nkeynes@901 | 103 | void enter_block( )
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nkeynes@539 | 104 | {
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nkeynes@539 | 105 | PUSH_r32(R_EBP);
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nkeynes@669 | 106 | load_ptr( R_EBP, ((uint8_t *)&sh4r) + 128 );
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nkeynes@926 | 107 | // Minimum aligned allocation is 16 bytes
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nkeynes@926 | 108 | REXW(); SUB_imm8s_r32( 16, R_ESP );
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nkeynes@926 | 109 | }
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nkeynes@926 | 110 |
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nkeynes@926 | 111 | static inline void exit_block( )
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nkeynes@926 | 112 | {
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nkeynes@926 | 113 | REXW(); ADD_imm8s_r32( 16, R_ESP );
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nkeynes@926 | 114 | POP_r32(R_EBP);
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nkeynes@926 | 115 | RET();
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nkeynes@539 | 116 | }
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nkeynes@908 | 117 |
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nkeynes@539 | 118 | /**
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nkeynes@539 | 119 | * Exit the block with sh4r.pc already written
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nkeynes@539 | 120 | */
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nkeynes@586 | 121 | void exit_block_pcset( sh4addr_t pc )
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nkeynes@539 | 122 | {
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nkeynes@539 | 123 | load_imm32( R_ECX, ((pc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
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nkeynes@539 | 124 | ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6
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nkeynes@590 | 125 | load_spreg( R_EAX, R_PC );
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nkeynes@590 | 126 | if( sh4_x86.tlb_on ) {
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nkeynes@736 | 127 | call_func1(xlat_get_code_by_vma,R_EAX);
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nkeynes@590 | 128 | } else {
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nkeynes@736 | 129 | call_func1(xlat_get_code,R_EAX);
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nkeynes@590 | 130 | }
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nkeynes@926 | 131 | exit_block();
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nkeynes@590 | 132 | }
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nkeynes@590 | 133 |
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nkeynes@590 | 134 | /**
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nkeynes@590 | 135 | * Exit the block with sh4r.new_pc written with the target address
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nkeynes@590 | 136 | */
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nkeynes@590 | 137 | void exit_block_newpcset( sh4addr_t pc )
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nkeynes@590 | 138 | {
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nkeynes@590 | 139 | load_imm32( R_ECX, ((pc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
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nkeynes@590 | 140 | ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6
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nkeynes@590 | 141 | load_spreg( R_EAX, R_NEW_PC );
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nkeynes@590 | 142 | store_spreg( R_EAX, R_PC );
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nkeynes@586 | 143 | if( sh4_x86.tlb_on ) {
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nkeynes@736 | 144 | call_func1(xlat_get_code_by_vma,R_EAX);
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nkeynes@586 | 145 | } else {
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nkeynes@736 | 146 | call_func1(xlat_get_code,R_EAX);
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nkeynes@586 | 147 | }
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nkeynes@926 | 148 | exit_block();
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nkeynes@539 | 149 | }
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nkeynes@539 | 150 |
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nkeynes@586 | 151 | #define EXIT_BLOCK_SIZE(pc) (25 + (IS_IN_ICACHE(pc)?10:CALL_FUNC1_SIZE))
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nkeynes@539 | 152 | /**
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nkeynes@539 | 153 | * Exit the block to an absolute PC
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nkeynes@539 | 154 | */
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nkeynes@926 | 155 | void exit_block_abs( sh4addr_t pc, sh4addr_t endpc )
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nkeynes@539 | 156 | {
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nkeynes@539 | 157 | load_imm32( R_ECX, pc ); // 5
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nkeynes@539 | 158 | store_spreg( R_ECX, REG_OFFSET(pc) ); // 3
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nkeynes@586 | 159 | if( IS_IN_ICACHE(pc) ) {
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nkeynes@736 | 160 | REXW(); MOV_moff32_EAX( xlat_get_lut_entry(pc) );
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nkeynes@926 | 161 | REXW(); AND_imm8s_r32( 0xFC, R_EAX ); // 4
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nkeynes@586 | 162 | } else if( sh4_x86.tlb_on ) {
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nkeynes@736 | 163 | call_func1(xlat_get_code_by_vma, R_ECX);
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nkeynes@586 | 164 | } else {
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nkeynes@736 | 165 | call_func1(xlat_get_code,R_ECX);
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nkeynes@586 | 166 | }
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nkeynes@539 | 167 | load_imm32( R_ECX, ((endpc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
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nkeynes@539 | 168 | ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6
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nkeynes@926 | 169 | exit_block();
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nkeynes@539 | 170 | }
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nkeynes@539 | 171 |
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nkeynes@539 | 172 |
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nkeynes@586 | 173 | #define EXIT_BLOCK_REL_SIZE(pc) (28 + (IS_IN_ICACHE(pc)?10:CALL_FUNC1_SIZE))
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nkeynes@586 | 174 |
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nkeynes@586 | 175 | /**
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nkeynes@586 | 176 | * Exit the block to a relative PC
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nkeynes@586 | 177 | */
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nkeynes@586 | 178 | void exit_block_rel( sh4addr_t pc, sh4addr_t endpc )
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nkeynes@586 | 179 | {
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nkeynes@586 | 180 | load_imm32( R_ECX, pc - sh4_x86.block_start_pc ); // 5
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nkeynes@586 | 181 | ADD_sh4r_r32( R_PC, R_ECX );
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nkeynes@586 | 182 | store_spreg( R_ECX, REG_OFFSET(pc) ); // 3
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nkeynes@586 | 183 | if( IS_IN_ICACHE(pc) ) {
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nkeynes@736 | 184 | REXW(); MOV_moff32_EAX( xlat_get_lut_entry(GET_ICACHE_PHYS(pc)) ); // 5
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nkeynes@926 | 185 | REXW(); AND_imm8s_r32( 0xFC, R_EAX ); // 4
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nkeynes@586 | 186 | } else if( sh4_x86.tlb_on ) {
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nkeynes@736 | 187 | call_func1(xlat_get_code_by_vma,R_ECX);
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nkeynes@586 | 188 | } else {
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nkeynes@736 | 189 | call_func1(xlat_get_code,R_ECX);
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nkeynes@586 | 190 | }
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nkeynes@586 | 191 | load_imm32( R_ECX, ((endpc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
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nkeynes@586 | 192 | ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6
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nkeynes@926 | 193 | exit_block();
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nkeynes@586 | 194 | }
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nkeynes@586 | 195 |
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nkeynes@539 | 196 | /**
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nkeynes@539 | 197 | * Write the block trailer (exception handling block)
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nkeynes@539 | 198 | */
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nkeynes@539 | 199 | void sh4_translate_end_block( sh4addr_t pc ) {
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nkeynes@539 | 200 | if( sh4_x86.branch_taken == FALSE ) {
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nkeynes@736 | 201 | // Didn't exit unconditionally already, so write the termination here
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nkeynes@736 | 202 | exit_block_rel( pc, pc );
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nkeynes@539 | 203 | }
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nkeynes@539 | 204 | if( sh4_x86.backpatch_posn != 0 ) {
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nkeynes@736 | 205 | unsigned int i;
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nkeynes@736 | 206 | // Raise exception
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nkeynes@736 | 207 | uint8_t *end_ptr = xlat_output;
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nkeynes@736 | 208 | MOV_r32_r32( R_EDX, R_ECX );
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nkeynes@736 | 209 | ADD_r32_r32( R_EDX, R_ECX );
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nkeynes@736 | 210 | ADD_r32_sh4r( R_ECX, R_PC );
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nkeynes@736 | 211 | MOV_moff32_EAX( &sh4_cpu_period );
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nkeynes@736 | 212 | MUL_r32( R_EDX );
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nkeynes@736 | 213 | ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) );
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nkeynes@539 | 214 |
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nkeynes@736 | 215 | call_func0( sh4_raise_exception );
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nkeynes@736 | 216 | load_spreg( R_EAX, R_PC );
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nkeynes@736 | 217 | if( sh4_x86.tlb_on ) {
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nkeynes@736 | 218 | call_func1(xlat_get_code_by_vma,R_EAX);
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nkeynes@736 | 219 | } else {
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nkeynes@736 | 220 | call_func1(xlat_get_code,R_EAX);
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nkeynes@736 | 221 | }
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nkeynes@926 | 222 | exit_block();
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nkeynes@926 | 223 |
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nkeynes@736 | 224 | // Exception already raised - just cleanup
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nkeynes@736 | 225 | uint8_t *preexc_ptr = xlat_output;
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nkeynes@736 | 226 | MOV_r32_r32( R_EDX, R_ECX );
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nkeynes@736 | 227 | ADD_r32_r32( R_EDX, R_ECX );
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nkeynes@736 | 228 | ADD_r32_sh4r( R_ECX, R_SPC );
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nkeynes@736 | 229 | MOV_moff32_EAX( &sh4_cpu_period );
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nkeynes@736 | 230 | MUL_r32( R_EDX );
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nkeynes@736 | 231 | ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) );
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nkeynes@736 | 232 | load_spreg( R_EDI, R_PC );
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nkeynes@736 | 233 | if( sh4_x86.tlb_on ) {
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nkeynes@736 | 234 | call_func0(xlat_get_code_by_vma);
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nkeynes@736 | 235 | } else {
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nkeynes@736 | 236 | call_func0(xlat_get_code);
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nkeynes@736 | 237 | }
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nkeynes@926 | 238 | exit_block();
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nkeynes@586 | 239 |
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nkeynes@736 | 240 | for( i=0; i< sh4_x86.backpatch_posn; i++ ) {
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nkeynes@736 | 241 | uint32_t *fixup_addr = (uint32_t *)&xlat_current_block->code[sh4_x86.backpatch_list[i].fixup_offset];
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nkeynes@736 | 242 | if( sh4_x86.backpatch_list[i].exc_code < 0 ) {
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nkeynes@927 | 243 | if( sh4_x86.backpatch_list[i].exc_code == -2 ) {
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nkeynes@927 | 244 | *((uintptr_t *)fixup_addr) = (uintptr_t)xlat_output;
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nkeynes@927 | 245 | } else {
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nkeynes@927 | 246 | *fixup_addr = xlat_output - (uint8_t *)&xlat_current_block->code[sh4_x86.backpatch_list[i].fixup_offset] - 4;
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nkeynes@927 | 247 | }
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nkeynes@736 | 248 | load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount );
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nkeynes@736 | 249 | int rel = preexc_ptr - xlat_output;
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nkeynes@736 | 250 | JMP_rel(rel);
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nkeynes@736 | 251 | } else {
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nkeynes@927 | 252 | *fixup_addr = xlat_output - (uint8_t *)&xlat_current_block->code[sh4_x86.backpatch_list[i].fixup_offset] - 4;
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nkeynes@736 | 253 | load_imm32( R_EDI, sh4_x86.backpatch_list[i].exc_code );
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nkeynes@736 | 254 | load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount );
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nkeynes@736 | 255 | int rel = end_ptr - xlat_output;
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nkeynes@736 | 256 | JMP_rel(rel);
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nkeynes@736 | 257 | }
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nkeynes@736 | 258 | }
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nkeynes@539 | 259 | }
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nkeynes@539 | 260 | }
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nkeynes@539 | 261 |
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nkeynes@926 | 262 | struct UnwindInfo {
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nkeynes@926 | 263 | uintptr_t block_start;
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nkeynes@926 | 264 | uintptr_t block_end;
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nkeynes@926 | 265 | void *pc;
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nkeynes@926 | 266 | };
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nkeynes@926 | 267 |
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nkeynes@586 | 268 | _Unwind_Reason_Code xlat_check_frame( struct _Unwind_Context *context, void *arg )
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nkeynes@586 | 269 | {
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nkeynes@926 | 270 | struct UnwindInfo *info = arg;
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nkeynes@926 | 271 | void *pc = (void *)_Unwind_GetIP(context);
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nkeynes@926 | 272 | if( ((uintptr_t)pc) >= info->block_start && ((uintptr_t)pc) < info->block_end ) {
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nkeynes@926 | 273 | info->pc = pc;
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nkeynes@586 | 274 | return _URC_NORMAL_STOP;
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nkeynes@586 | 275 | }
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nkeynes@926 | 276 |
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nkeynes@586 | 277 | return _URC_NO_REASON;
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nkeynes@586 | 278 | }
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nkeynes@586 | 279 |
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nkeynes@926 | 280 | void *xlat_get_native_pc( void *code, uint32_t code_size )
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nkeynes@586 | 281 | {
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nkeynes@586 | 282 | struct _Unwind_Exception exc;
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nkeynes@926 | 283 | struct UnwindInfo info;
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nkeynes@736 | 284 |
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nkeynes@926 | 285 | info.pc = NULL;
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nkeynes@926 | 286 | info.block_start = (uintptr_t)code;
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nkeynes@926 | 287 | info.block_end = info.block_start + code_size;
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nkeynes@586 | 288 | void *result = NULL;
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nkeynes@926 | 289 | _Unwind_Backtrace( xlat_check_frame, &info );
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nkeynes@926 | 290 | return info.pc;
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nkeynes@586 | 291 | }
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nkeynes@586 | 292 |
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nkeynes@736 | 293 | #endif /* !lxdream_ia64abi_H */
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