sewardj | 35421a3 | 2004-07-05 13:12:34 +0000 | [diff] [blame] | 1 | |
| 2 | /*---------------------------------------------------------------*/ |
| 3 | /*--- ---*/ |
sewardj | 887a11a | 2004-07-05 17:26:47 +0000 | [diff] [blame] | 4 | /*--- This file (vex_main.c) is ---*/ |
sewardj | 35421a3 | 2004-07-05 13:12:34 +0000 | [diff] [blame] | 5 | /*--- Copyright (c) 2004 OpenWorks LLP. All rights reserved. ---*/ |
| 6 | /*--- ---*/ |
| 7 | /*---------------------------------------------------------------*/ |
| 8 | |
sewardj | 887a11a | 2004-07-05 17:26:47 +0000 | [diff] [blame] | 9 | #include "libvex.h" |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 10 | |
sewardj | 887a11a | 2004-07-05 17:26:47 +0000 | [diff] [blame] | 11 | #include "vex_globals.h" |
sewardj | 35421a3 | 2004-07-05 13:12:34 +0000 | [diff] [blame] | 12 | #include "vex_util.h" |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 13 | #include "host_regs.h" |
| 14 | #include "x86h_defs.h" |
sewardj | 35421a3 | 2004-07-05 13:12:34 +0000 | [diff] [blame] | 15 | |
| 16 | |
| 17 | /* This file contains the top level interface to the library. */ |
| 18 | |
| 19 | /* --------- Initialise the library. --------- */ |
| 20 | |
| 21 | /* Exported to library client. */ |
| 22 | |
sewardj | 887a11a | 2004-07-05 17:26:47 +0000 | [diff] [blame] | 23 | void LibVEX_Init ( |
sewardj | 35421a3 | 2004-07-05 13:12:34 +0000 | [diff] [blame] | 24 | /* failure exit function */ |
sewardj | 2b51587 | 2004-07-05 20:50:45 +0000 | [diff] [blame^] | 25 | __attribute__ ((noreturn)) |
sewardj | 35421a3 | 2004-07-05 13:12:34 +0000 | [diff] [blame] | 26 | void (*failure_exit) ( void ), |
| 27 | /* logging output function */ |
| 28 | void (*log_bytes) ( Char*, Int nbytes ), |
| 29 | /* debug paranoia level */ |
| 30 | Int debuglevel, |
| 31 | /* verbosity level */ |
| 32 | Int verbosity, |
| 33 | /* Are we supporting valgrind checking? */ |
| 34 | Bool valgrind_support, |
| 35 | /* Max # guest insns per bb */ |
| 36 | Int guest_insns_per_bb |
| 37 | ) |
| 38 | { |
| 39 | vassert(!vex_initdone); |
| 40 | vassert(failure_exit); |
| 41 | vex_failure_exit = failure_exit; |
| 42 | vassert(log_bytes); |
| 43 | vex_log_bytes = log_bytes; |
| 44 | vassert(debuglevel >= 0); |
| 45 | vex_debuglevel = debuglevel; |
| 46 | vassert(verbosity >= 0); |
| 47 | vex_verbosity = verbosity; |
| 48 | vex_valgrind_support = valgrind_support; |
| 49 | vassert(guest_insns_per_bb >= 1 && guest_insns_per_bb <= 100); |
| 50 | vex_guest_insns_per_bb = guest_insns_per_bb; |
| 51 | vex_initdone = True; |
| 52 | } |
| 53 | |
| 54 | |
| 55 | /* --------- Make a translation. --------- */ |
| 56 | |
| 57 | /* Exported to library client. */ |
| 58 | |
sewardj | 887a11a | 2004-07-05 17:26:47 +0000 | [diff] [blame] | 59 | TranslateResult LibVEX_Translate ( |
sewardj | 35421a3 | 2004-07-05 13:12:34 +0000 | [diff] [blame] | 60 | /* The instruction sets we are translating from and to. */ |
| 61 | InsnSet iset_guest, |
| 62 | InsnSet iset_host, |
| 63 | /* IN: the block to translate, and its guest address. */ |
| 64 | Char* guest_bytes, |
| 65 | Addr64 guest_bytes_addr, |
| 66 | /* OUT: the number of bytes actually read */ |
| 67 | Int* guest_bytes_read, |
| 68 | /* IN: a place to put the resulting code, and its size */ |
| 69 | Char* host_bytes, |
| 70 | Int host_bytes_size, |
| 71 | /* OUT: how much of the output area is used. */ |
| 72 | Int* host_bytes_used, |
| 73 | /* IN: optionally, an instrumentation function. */ |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 74 | IRBB* (*instrument) ( IRBB* ), |
sewardj | 35421a3 | 2004-07-05 13:12:34 +0000 | [diff] [blame] | 75 | /* IN: optionally, an access check function for guest code. */ |
| 76 | Bool (*byte_accessible) ( Addr64 ) |
| 77 | ) |
| 78 | { |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 79 | /* Stuff we need to know for reg-alloc. */ |
| 80 | HReg* available_real_regs; |
| 81 | Int n_available_real_regs; |
| 82 | Bool (*isMove) (HInstr*, HReg*, HReg*); |
| 83 | void (*getRegUsage) (HRegUsage*, HInstr*); |
| 84 | void (*mapRegs) (HRegRemap*, HInstr*); |
| 85 | HInstr* (*genSpill) ( HReg, Int ); |
| 86 | HInstr* (*genReload) ( HReg, Int ); |
sewardj | 2b51587 | 2004-07-05 20:50:45 +0000 | [diff] [blame^] | 87 | void (*ppInstr) ( HInstr* ); |
| 88 | void (*ppReg) ( HReg ); |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 89 | HInstrArray* (*iselBB) ( IRBB* ); |
| 90 | IRBB* (*bbToIR) ( Char*, Addr64, Int*, Bool(*)(Addr64) ); |
| 91 | |
| 92 | IRBB* irbb; |
| 93 | HInstrArray* vcode; |
| 94 | HInstrArray* rcode; |
| 95 | |
sewardj | 35421a3 | 2004-07-05 13:12:34 +0000 | [diff] [blame] | 96 | vassert(vex_initdone); |
sewardj | 887a11a | 2004-07-05 17:26:47 +0000 | [diff] [blame] | 97 | LibVEX_Clear(False); |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 98 | |
| 99 | /* First off, check that the guest and host insn sets |
| 100 | are supported. */ |
| 101 | switch (iset_host) { |
| 102 | case InsnSetX86: |
| 103 | getAllocableRegs_X86 ( &n_available_real_regs, |
| 104 | &available_real_regs ); |
| 105 | isMove = (Bool(*)(HInstr*,HReg*,HReg*)) isMove_X86Instr; |
| 106 | getRegUsage = (void(*)(HRegUsage*,HInstr*)) getRegUsage_X86Instr; |
| 107 | mapRegs = (void(*)(HRegRemap*,HInstr*)) mapRegs_X86Instr; |
| 108 | genSpill = (HInstr*(*)(HReg,Int)) genSpill_X86; |
| 109 | genReload = (HInstr*(*)(HReg,Int)) genReload_X86; |
sewardj | 2b51587 | 2004-07-05 20:50:45 +0000 | [diff] [blame^] | 110 | ppInstr = (void(*)(HInstr*)) ppX86Instr; |
| 111 | ppReg = (void(*)(HReg)) ppHRegX86; |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 112 | iselBB = iselBB_X86; |
| 113 | break; |
| 114 | default: |
sewardj | 887a11a | 2004-07-05 17:26:47 +0000 | [diff] [blame] | 115 | vpanic("LibVEX_Translate: unsupported target insn set"); |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | switch (iset_guest) { |
| 119 | case InsnSetX86: |
| 120 | bbToIR = NULL; //bbToIR_X86Instr; |
| 121 | break; |
| 122 | default: |
sewardj | 887a11a | 2004-07-05 17:26:47 +0000 | [diff] [blame] | 123 | vpanic("LibVEX_Translate: unsupported guest insn set"); |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | irbb = bbToIR ( guest_bytes, |
| 127 | guest_bytes_addr, |
| 128 | guest_bytes_read, |
| 129 | byte_accessible ); |
| 130 | |
| 131 | if (irbb == NULL) { |
| 132 | /* Access failure. */ |
sewardj | 887a11a | 2004-07-05 17:26:47 +0000 | [diff] [blame] | 133 | LibVEX_Clear(False); |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 134 | return TransAccessFail; |
| 135 | } |
| 136 | |
| 137 | /* Get the thing instrumented. */ |
| 138 | if (instrument) |
| 139 | irbb = (*instrument)(irbb); |
| 140 | |
| 141 | /* Turn it into virtual-registerised code. */ |
| 142 | vcode = iselBB ( irbb ); |
| 143 | |
| 144 | /* Register allocate. */ |
| 145 | rcode = doRegisterAllocation ( vcode, available_real_regs, |
| 146 | n_available_real_regs, |
| 147 | isMove, getRegUsage, mapRegs, |
sewardj | 2b51587 | 2004-07-05 20:50:45 +0000 | [diff] [blame^] | 148 | genSpill, genReload, |
| 149 | ppInstr, ppReg ); |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 150 | |
| 151 | /* Assemble, etc. */ |
sewardj | 887a11a | 2004-07-05 17:26:47 +0000 | [diff] [blame] | 152 | LibVEX_Clear(True); |
sewardj | f13a16a | 2004-07-05 17:10:14 +0000 | [diff] [blame] | 153 | |
sewardj | 35421a3 | 2004-07-05 13:12:34 +0000 | [diff] [blame] | 154 | return TransOK; |
| 155 | } |
| 156 | |
| 157 | |
| 158 | |
| 159 | /*---------------------------------------------------------------*/ |
sewardj | 887a11a | 2004-07-05 17:26:47 +0000 | [diff] [blame] | 160 | /*--- end vex_main.c ---*/ |
sewardj | 35421a3 | 2004-07-05 13:12:34 +0000 | [diff] [blame] | 161 | /*---------------------------------------------------------------*/ |