toolkit/crashreporter/google-breakpad/src/third_party/libdisasm/x86_insn.c@6474c204b198 (annotated)
toolkit/crashreporter/google-breakpad/src/third_party/libdisasm/x86_insn.c
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | #include <stdio.h> |
| michael@0 | 2 | #include <stdlib.h> |
| michael@0 | 3 | |
| michael@0 | 4 | #include "libdis.h" |
| michael@0 | 5 | |
| michael@0 | 6 | #ifdef _MSC_VER |
| michael@0 | 7 | #define snprintf _snprintf |
| michael@0 | 8 | #define inline __inline |
| michael@0 | 9 | #endif |
| michael@0 | 10 | |
| michael@0 | 11 | int x86_insn_is_valid( x86_insn_t *insn ) { |
| michael@0 | 12 | if ( insn && insn->type != insn_invalid && insn->size > 0 ) { |
| michael@0 | 13 | return 1; |
| michael@0 | 14 | } |
| michael@0 | 15 | |
| michael@0 | 16 | return 0; |
| michael@0 | 17 | } |
| michael@0 | 18 | |
| michael@0 | 19 | uint32_t x86_get_address( x86_insn_t *insn ) { |
| michael@0 | 20 | x86_oplist_t *op_lst; |
| michael@0 | 21 | if (! insn || ! insn->operands ) { |
| michael@0 | 22 | return 0; |
| michael@0 | 23 | } |
| michael@0 | 24 | |
| michael@0 | 25 | for (op_lst = insn->operands; op_lst; op_lst = op_lst->next ) { |
| michael@0 | 26 | if ( op_lst->op.type == op_offset ) { |
| michael@0 | 27 | return op_lst->op.data.offset; |
| michael@0 | 28 | } else if ( op_lst->op.type == op_absolute ) { |
| michael@0 | 29 | if ( op_lst->op.datatype == op_descr16 ) { |
| michael@0 | 30 | return (uint32_t) |
| michael@0 | 31 | op_lst->op.data.absolute.offset.off16; |
| michael@0 | 32 | } |
| michael@0 | 33 | return op_lst->op.data.absolute.offset.off32; |
| michael@0 | 34 | } |
| michael@0 | 35 | } |
| michael@0 | 36 | |
| michael@0 | 37 | return 0; |
| michael@0 | 38 | } |
| michael@0 | 39 | |
| michael@0 | 40 | int32_t x86_get_rel_offset( x86_insn_t *insn ) { |
| michael@0 | 41 | x86_oplist_t *op_lst; |
| michael@0 | 42 | if (! insn || ! insn->operands ) { |
| michael@0 | 43 | return 0; |
| michael@0 | 44 | } |
| michael@0 | 45 | |
| michael@0 | 46 | for (op_lst = insn->operands; op_lst; op_lst = op_lst->next ) { |
| michael@0 | 47 | if ( op_lst->op.type == op_relative_near ) { |
| michael@0 | 48 | return (int32_t) op_lst->op.data.relative_near; |
| michael@0 | 49 | } else if ( op_lst->op.type == op_relative_far ) { |
| michael@0 | 50 | return op_lst->op.data.relative_far; |
| michael@0 | 51 | } |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | return 0; |
| michael@0 | 55 | } |
| michael@0 | 56 | |
| michael@0 | 57 | x86_op_t * x86_get_branch_target( x86_insn_t *insn ) { |
| michael@0 | 58 | x86_oplist_t *op_lst; |
| michael@0 | 59 | if (! insn || ! insn->operands ) { |
| michael@0 | 60 | return NULL; |
| michael@0 | 61 | } |
| michael@0 | 62 | |
| michael@0 | 63 | for (op_lst = insn->operands; op_lst; op_lst = op_lst->next ) { |
| michael@0 | 64 | if ( op_lst->op.access & op_execute ) { |
| michael@0 | 65 | return &(op_lst->op); |
| michael@0 | 66 | } |
| michael@0 | 67 | } |
| michael@0 | 68 | |
| michael@0 | 69 | return NULL; |
| michael@0 | 70 | } |
| michael@0 | 71 | x86_op_t * x86_get_imm( x86_insn_t *insn ) { |
| michael@0 | 72 | x86_oplist_t *op_lst; |
| michael@0 | 73 | if (! insn || ! insn->operands ) { |
| michael@0 | 74 | return NULL; |
| michael@0 | 75 | } |
| michael@0 | 76 | |
| michael@0 | 77 | for (op_lst = insn->operands; op_lst; op_lst = op_lst->next ) { |
| michael@0 | 78 | if ( op_lst->op.type == op_immediate ) { |
| michael@0 | 79 | return &(op_lst->op); |
| michael@0 | 80 | } |
| michael@0 | 81 | } |
| michael@0 | 82 | |
| michael@0 | 83 | return NULL; |
| michael@0 | 84 | } |
| michael@0 | 85 | |
| michael@0 | 86 | #define IS_PROPER_IMM( x ) \ |
| michael@0 | 87 | x->op.type == op_immediate && ! (x->op.flags & op_hardcode) |
| michael@0 | 88 | |
| michael@0 | 89 | |
| michael@0 | 90 | /* if there is an immediate value in the instruction, return a pointer to |
| michael@0 | 91 | * it */ |
| michael@0 | 92 | unsigned char * x86_get_raw_imm( x86_insn_t *insn ) { |
| michael@0 | 93 | int size, offset; |
| michael@0 | 94 | x86_op_t *op = NULL; |
| michael@0 | 95 | |
| michael@0 | 96 | if (! insn || ! insn->operands ) { |
| michael@0 | 97 | return(NULL); |
| michael@0 | 98 | } |
| michael@0 | 99 | |
| michael@0 | 100 | /* a bit inelegant, but oh well... */ |
| michael@0 | 101 | if ( IS_PROPER_IMM( insn->operands ) ) { |
| michael@0 | 102 | op = &insn->operands->op; |
| michael@0 | 103 | } else if ( insn->operands->next ) { |
| michael@0 | 104 | if ( IS_PROPER_IMM( insn->operands->next ) ) { |
| michael@0 | 105 | op = &insn->operands->next->op; |
| michael@0 | 106 | } else if ( insn->operands->next->next && |
| michael@0 | 107 | IS_PROPER_IMM( insn->operands->next->next ) ) { |
| michael@0 | 108 | op = &insn->operands->next->next->op; |
| michael@0 | 109 | } |
| michael@0 | 110 | } |
| michael@0 | 111 | |
| michael@0 | 112 | if (! op ) { |
| michael@0 | 113 | return( NULL ); |
| michael@0 | 114 | } |
| michael@0 | 115 | |
| michael@0 | 116 | /* immediate data is at the end of the insn */ |
| michael@0 | 117 | size = x86_operand_size( op ); |
| michael@0 | 118 | offset = insn->size - size; |
| michael@0 | 119 | return( &insn->bytes[offset] ); |
| michael@0 | 120 | } |
| michael@0 | 121 | |
| michael@0 | 122 | |
| michael@0 | 123 | unsigned int x86_operand_size( x86_op_t *op ) { |
| michael@0 | 124 | switch (op->datatype ) { |
| michael@0 | 125 | case op_byte: return 1; |
| michael@0 | 126 | case op_word: return 2; |
| michael@0 | 127 | case op_dword: return 4; |
| michael@0 | 128 | case op_qword: return 8; |
| michael@0 | 129 | case op_dqword: return 16; |
| michael@0 | 130 | case op_sreal: return 4; |
| michael@0 | 131 | case op_dreal: return 8; |
| michael@0 | 132 | case op_extreal: return 10; |
| michael@0 | 133 | case op_bcd: return 10; |
| michael@0 | 134 | case op_ssimd: return 16; |
| michael@0 | 135 | case op_dsimd: return 16; |
| michael@0 | 136 | case op_sssimd: return 4; |
| michael@0 | 137 | case op_sdsimd: return 8; |
| michael@0 | 138 | case op_descr32: return 6; |
| michael@0 | 139 | case op_descr16: return 4; |
| michael@0 | 140 | case op_pdescr32: return 6; |
| michael@0 | 141 | case op_pdescr16: return 6; |
| michael@0 | 142 | case op_bounds16: return 4; |
| michael@0 | 143 | case op_bounds32: return 8; |
| michael@0 | 144 | case op_fpuenv16: return 14; |
| michael@0 | 145 | case op_fpuenv32: return 28; |
| michael@0 | 146 | case op_fpustate16: return 94; |
| michael@0 | 147 | case op_fpustate32: return 108; |
| michael@0 | 148 | case op_fpregset: return 512; |
| michael@0 | 149 | case op_fpreg: return 10; |
| michael@0 | 150 | case op_none: return 0; |
| michael@0 | 151 | } |
| michael@0 | 152 | return(4); /* default size */ |
| michael@0 | 153 | } |
| michael@0 | 154 | |
| michael@0 | 155 | void x86_set_insn_addr( x86_insn_t *insn, uint32_t addr ) { |
| michael@0 | 156 | if ( insn ) insn->addr = addr; |
| michael@0 | 157 | } |
| michael@0 | 158 | |
| michael@0 | 159 | void x86_set_insn_offset( x86_insn_t *insn, unsigned int offset ){ |
| michael@0 | 160 | if ( insn ) insn->offset = offset; |
| michael@0 | 161 | } |
| michael@0 | 162 | |
| michael@0 | 163 | void x86_set_insn_function( x86_insn_t *insn, void * func ){ |
| michael@0 | 164 | if ( insn ) insn->function = func; |
| michael@0 | 165 | } |
| michael@0 | 166 | |
| michael@0 | 167 | void x86_set_insn_block( x86_insn_t *insn, void * block ){ |
| michael@0 | 168 | if ( insn ) insn->block = block; |
| michael@0 | 169 | } |
| michael@0 | 170 | |
| michael@0 | 171 | void x86_tag_insn( x86_insn_t *insn ){ |
| michael@0 | 172 | if ( insn ) insn->tag = 1; |
| michael@0 | 173 | } |
| michael@0 | 174 | |
| michael@0 | 175 | void x86_untag_insn( x86_insn_t *insn ){ |
| michael@0 | 176 | if ( insn ) insn->tag = 0; |
| michael@0 | 177 | } |
| michael@0 | 178 | |
| michael@0 | 179 | int x86_insn_is_tagged( x86_insn_t *insn ){ |
| michael@0 | 180 | return insn->tag; |
| michael@0 | 181 | } |
| michael@0 | 182 |
