57e4efe9 |
1 | #include <stdio.h> |
2 | #include <stdlib.h> |
3 | #include <string.h> |
4 | |
5 | #include "my_assert.h" |
6 | #include "my_str.h" |
7 | |
8 | static int find_protostr(char *dst, size_t dlen, FILE *fhdr, |
9 | const char *sym, int *pline) |
10 | { |
11 | int line = 0; |
12 | char *p; |
13 | |
14 | while (fgets(dst, dlen, fhdr)) |
15 | { |
16 | line++; |
17 | if (strstr(dst, sym) != NULL) |
18 | break; |
19 | } |
20 | *pline = line; |
21 | |
22 | if (feof(fhdr)) |
23 | return -1; |
24 | |
25 | p = dst + strlen(dst); |
26 | for (p--; p > dst && my_isblank(*p); --p) |
27 | *p = 0; |
28 | |
29 | return 0; |
30 | } |
31 | |
32 | static int get_regparm(char *dst, size_t dlen, char *p) |
33 | { |
34 | int i, o; |
35 | |
36 | if (*p != '<') |
37 | return 0; |
38 | |
39 | for (o = 0, i = 1; o < dlen; i++) { |
40 | if (p[i] == 0) |
41 | return 0; |
42 | if (p[i] == '>') |
43 | break; |
44 | dst[o++] = p[i]; |
45 | } |
46 | dst[o] = 0; |
47 | return i + 1; |
48 | } |
49 | |
50 | static const char *known_types[] = { |
51 | "unsigned int", |
52 | "signed int", |
53 | "int", |
54 | "void", |
55 | "DWORD", |
56 | "HMODULE", |
57 | "HANDLE", |
58 | "HWND", |
59 | }; |
60 | |
61 | static int check_type(const char *name) |
62 | { |
63 | int i, l; |
64 | |
65 | for (i = 0; i < sizeof(known_types) / sizeof(known_types[0]); i++) { |
66 | l = strlen(known_types[i]); |
67 | if (strncmp(known_types[i], name, l) == 0) |
68 | return l; |
69 | } |
70 | |
71 | return 0; |
72 | } |
73 | |
74 | int main(int argc, char *argv[]) |
75 | { |
76 | FILE *fout, *fsyms, *fhdr; |
77 | const char *hdrfn; |
78 | char protostr[256]; |
79 | char line[256]; |
80 | char sym[256]; |
81 | char buf[256]; |
82 | char regparm[16]; |
83 | char *p; |
84 | int first_regparm = 0; |
85 | int have_regparm; |
86 | int pline = 0; |
87 | int xarg; |
88 | int ret; |
89 | |
90 | if (argc != 4) { |
91 | // -c - patch callsites |
92 | printf("usage:\n%s <bridge.s> <symf> <hdrf>\n", |
93 | argv[0]); |
94 | return 1; |
95 | } |
96 | |
97 | hdrfn = argv[3]; |
98 | fhdr = fopen(hdrfn, "r"); |
99 | my_assert_not(fhdr, NULL); |
100 | |
101 | fsyms = fopen(argv[2], "r"); |
102 | my_assert_not(fsyms, NULL); |
103 | |
104 | fout = fopen(argv[1], "w"); |
105 | my_assert_not(fout, NULL); |
106 | |
107 | fprintf(fout, ".text\n\n"); |
108 | |
109 | while (fgets(line, sizeof(line), fsyms)) |
110 | { |
111 | next_word(sym, sizeof(sym), line); |
112 | if (sym[0] == 0 || sym[0] == ';' || sym[0] == '#') |
113 | continue; |
114 | |
115 | ret = find_protostr(protostr, sizeof(protostr), fhdr, |
116 | sym, &pline); |
117 | if (ret != 0) { |
118 | printf("%s: sym '%s' is missing\n", |
119 | hdrfn, sym); |
120 | return 1; |
121 | } |
122 | |
123 | p = protostr; |
124 | if (p[0] == '/' && p[1] == '/') { |
125 | printf("warning: decl for sym '%s' is commented out\n", sym); |
126 | p = sskip(p + 2); |
127 | } |
128 | |
129 | ret = check_type(p); |
130 | if (ret <= 0) { |
131 | printf("%s:%d:%ld: unhandled return in '%s'\n", |
132 | hdrfn, pline, (p - protostr) + 1, protostr); |
133 | return 1; |
134 | } |
135 | p += ret; |
136 | p = sskip(p); |
137 | |
138 | // ignore calling convention specifier, for now |
139 | p = next_word(buf, sizeof(buf), p); |
140 | p = sskip(p); |
141 | if (buf[0] == 0) { |
142 | printf("%s:%d:%ld: cconv missing\n", |
143 | hdrfn, pline, (p - protostr) + 1); |
144 | return 1; |
145 | } |
146 | |
147 | p = next_idt(buf, sizeof(buf), p); |
148 | p = sskip(p); |
149 | if (buf[0] == 0) { |
150 | printf("%s:%d:%ld: func name missing\n", |
151 | hdrfn, pline, (p - protostr) + 1); |
152 | return 1; |
153 | } |
154 | |
155 | ret = get_regparm(regparm, sizeof(regparm), p); |
156 | if (ret > 0) { |
157 | if (strcmp(regparm, "eax") && strcmp(regparm, "ax")) { |
158 | printf("%s:%d:%ld: bad regparm: %s\n", |
159 | hdrfn, pline, (p - protostr) + 1, regparm); |
160 | return 1; |
161 | } |
162 | p += ret; |
163 | p = sskip(p); |
164 | } |
165 | |
166 | if (*p != '(') { |
167 | printf("%s:%d:%ld: '(' expected, got '%c'\n", |
168 | hdrfn, pline, (p - protostr) + 1, *p); |
169 | return 1; |
170 | } |
171 | p++; |
172 | |
173 | fprintf(fout, ".global _asm_%s\n", sym); |
174 | fprintf(fout, "_asm_%s:\n", sym); |
175 | |
176 | xarg = 1; |
177 | while (1) { |
178 | p = sskip(p); |
179 | if (*p == ')') |
180 | break; |
181 | if (*p == ',') |
182 | p = sskip(p + 1); |
183 | |
184 | ret = check_type(p); |
185 | if (ret <= 0) { |
186 | printf("%s:%d:%ld: unhandled type for arg%d\n", |
187 | hdrfn, pline, (p - protostr) + 1, xarg); |
188 | return 1; |
189 | } |
190 | p += ret; |
191 | p = sskip(p); |
192 | |
193 | p = next_idt(buf, sizeof(buf), p); |
194 | p = sskip(p); |
195 | if (buf[0] == 0) { |
196 | printf("%s:%d:%ld: idt missing for arg%d\n", |
197 | hdrfn, pline, (p - protostr) + 1, xarg); |
198 | return 1; |
199 | } |
200 | |
201 | have_regparm = 0; |
202 | ret = get_regparm(regparm, sizeof(regparm), p); |
203 | if (ret > 0) { |
204 | p += ret; |
205 | p = sskip(p); |
206 | |
207 | have_regparm = 1; |
208 | fprintf(fout, "\t movl %d(%%esp), %%%s\n", |
209 | xarg * 4, regparm); |
210 | } |
211 | if (xarg == 1) |
212 | first_regparm = have_regparm; |
213 | else if (have_regparm != first_regparm) { |
214 | printf("%s:%d:%ld: mixed regparm is unhandled\n", |
215 | hdrfn, pline, (p - protostr) + 1); |
216 | return 1; |
217 | } |
218 | } |
219 | |
220 | fprintf(fout, "\t jmp %s\n\n", sym); |
221 | } |
222 | |
223 | fclose(fout); |
224 | return 0; |
225 | } |