1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
%{
/*
* phpdbg_parser.y
* (from php-src root)
* flex sapi/phpdbg/dev/phpdbg_lexer.l
* bison sapi/phpdbg/dev/phpdbg_parser.y
*/
#include "phpdbg.h"
#include "phpdbg_cmd.h"
#include "phpdbg_utils.h"
#include "phpdbg_cmd.h"
#include "phpdbg_prompt.h"
#define YYSTYPE phpdbg_param_t
#include "phpdbg_parser.h"
#include "phpdbg_lexer.h"
#undef yyerror
static int yyerror(void ***tsrm_ls, const char *msg);
ZEND_EXTERN_MODULE_GLOBALS(phpdbg);
%}
%pure-parser
%error-verbose
%code requires {
#include "phpdbg.h"
#ifndef YY_TYPEDEF_YY_SCANNER_T
#define YY_TYPEDEF_YY_SCANNER_T
typedef void* yyscan_t;
#endif
}
%parse-param { void *tsrm_ls }
%output "sapi/phpdbg/phpdbg_parser.c"
%defines "sapi/phpdbg/phpdbg_parser.h"
%token T_EVAL "eval"
%token T_RUN "run"
%token T_SHELL "shell"
%token T_IF "if (condition)"
%token T_TRUTHY "truthy (true, on, yes or enabled)"
%token T_FALSY "falsy (false, off, no or disabled)"
%token T_STRING "string (some input, perhaps)"
%token T_COLON ": (colon)"
%token T_DCOLON ":: (double colon)"
%token T_POUND "# (pound sign)"
%token T_PROTO "protocol (file://)"
%token T_DIGITS "digits (numbers)"
%token T_LITERAL "literal (string)"
%token T_ADDR "address"
%token T_OPCODE "opcode"
%token T_ID "identifier (command or function name)"
%token T_INPUT "input (input string or data)"
%token T_UNEXPECTED "input"
%% /* Rules */
input
: parameters
| full_expression { phpdbg_stack_push(PHPDBG_G(parser_stack), &$1); }
| /* nothing */
;
parameters
: parameter { phpdbg_stack_push(PHPDBG_G(parser_stack), &$1); }
| parameters parameter { phpdbg_stack_push(PHPDBG_G(parser_stack), &$2); }
;
parameter
: T_ID T_COLON T_DIGITS {
$$.type = FILE_PARAM;
$$.file.name = $2.str;
$$.file.line = $3.num;
}
| T_ID T_COLON T_POUND T_DIGITS {
$$.type = NUMERIC_FILE_PARAM;
$$.file.name = $1.str;
$$.file.line = $4.num;
}
| T_PROTO T_ID T_COLON T_DIGITS {
$$.type = FILE_PARAM;
$$.file.name = malloc($1.len + $2.len + 1);
if ($$.file.name) {
memcpy(&$$.file.name[0], $1.str, $1.len);
memcpy(&$$.file.name[$1.len], $2.str, $2.len);
$$.file.name[$1.len + $2.len] = '\0';
}
$$.file.line = $4.num;
}
| T_PROTO T_ID T_COLON T_POUND T_DIGITS {
$$.type = NUMERIC_FILE_PARAM;
$$.file.name = malloc($1.len + $2.len + 1);
if ($$.file.name) {
memcpy(&$$.file.name[0], $1.str, $1.len);
memcpy(&$$.file.name[$1.len], $2.str, $2.len);
$$.file.name[$1.len + $2.len] = '\0';
}
$$.file.line = $5.num;
}
| T_ID T_DCOLON T_ID {
$$.type = METHOD_PARAM;
$$.method.class = $1.str;
$$.method.name = $3.str;
}
| T_ID T_DCOLON T_ID T_POUND T_DIGITS {
$$.type = NUMERIC_METHOD_PARAM;
$$.method.class = $1.str;
$$.method.name = $3.str;
$$.num = $5.num;
}
| T_ID T_POUND T_DIGITS {
$$.type = NUMERIC_FUNCTION_PARAM;
$$.str = $1.str;
$$.len = $1.len;
$$.num = $3.num;
}
| T_IF T_INPUT {
$$.type = COND_PARAM;
$$.str = $2.str;
$$.len = $2.len;
}
| T_OPCODE { $$ = $1; }
| T_ADDR { $$ = $1; }
| T_LITERAL { $$ = $1; }
| T_TRUTHY { $$ = $1; }
| T_FALSY { $$ = $1; }
| T_DIGITS { $$ = $1; }
| T_ID { $$ = $1; }
;
full_expression
: T_EVAL T_INPUT {
$$.type = EVAL_PARAM;
$$.str = $2.str;
$$.len = $2.len;
}
| T_SHELL T_INPUT {
$$.type = SHELL_PARAM;
$$.str = $2.str;
$$.len = $2.len;
}
| T_RUN {
$$.type = RUN_PARAM;
$$.len = 0;
}
| T_RUN T_INPUT {
$$.type = RUN_PARAM;
$$.str = $2.str;
$$.len = $2.len;
}
;
%%
static int yyerror(void ***tsrm_ls, const char *msg) {
phpdbg_error("Parse Error: %s", msg);
{
const phpdbg_param_t *top = PHPDBG_G(parser_stack);
while (top) {
phpdbg_param_debug(top, "--> ");
top = top->next;
}
}
return 0;
}
int phpdbg_do_parse(phpdbg_param_t *stack, char *input TSRMLS_DC) {
phpdbg_init_lexer(stack, input TSRMLS_CC);
#ifdef ZTS
return yyparse(TSRMLS_C);
#else
return yyparse(NULL);
#endif
}
|
