499bf01c |
1 | /* |
2 | * GINGE - GINGE Is Not Gp2x Emulator |
3 | * (C) notaz, 2010-2011 |
4 | * |
5 | * This work is licensed under the MAME license, see COPYING file for details. |
6 | */ |
7fd42181 |
7 | #define _GNU_SOURCE |
8 | #include <stdio.h> |
9 | #include <stdlib.h> |
10 | #include <sys/mman.h> |
11 | #include <dlfcn.h> |
12 | #include "header.h" |
13 | |
14 | #define DL |
15 | #include "override.c" |
16 | |
4d045184 |
17 | static void next_line(FILE *f) |
18 | { |
19 | int c; |
20 | do { |
21 | c = fgetc(f); |
22 | } while (c != EOF && c != '\n'); |
23 | } |
24 | |
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25 | __attribute__((constructor)) |
26 | static void ginge_init(void) |
27 | { |
890c1dc5 |
28 | void *lowest_segments[2] = { NULL, NULL }; |
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29 | unsigned int start, end; |
30 | int i, ret; |
31 | FILE *f; |
32 | |
33 | for (i = 0; i < ARRAY_SIZE(real_funcs_np); i++) { |
34 | *real_funcs_np[i].func_ptr = dlsym(RTLD_NEXT, real_funcs_np[i].name); |
35 | if (*real_funcs_np[i].func_ptr == NULL) { |
36 | fprintf(stderr, "dlsym %s: %s\n", real_funcs_np[i].name, dlerror()); |
37 | exit(1); |
38 | } |
39 | // dbg("%p %s\n", *real_funcs_np[i].func_ptr, real_funcs_np[i].name); |
40 | } |
41 | |
42 | f = fopen("/proc/self/maps", "r"); |
43 | if (f == NULL) { |
44 | perror("open /proc/self/maps"); |
45 | exit(1); |
46 | } |
47 | |
4d045184 |
48 | ret = fscanf(f, "%x-%x ", &start, &end); |
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49 | if (ret != 2) { |
50 | perror("parse maps"); |
51 | exit(1); |
52 | } |
890c1dc5 |
53 | lowest_segments[0] = (void *)start; |
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54 | |
55 | while (1) { |
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56 | next_line(f); |
57 | |
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58 | ret = fscanf(f, "%x-%*s %*s %*s %*s %*s %*s\n", &start); |
59 | if (ret <= 0) |
60 | break; |
61 | |
890c1dc5 |
62 | if (lowest_segments[0] == NULL || (void *)start < lowest_segments[0]) |
63 | lowest_segments[0] = (void *)start; |
64 | else if (lowest_segments[1] == NULL |
65 | && (char *)start - (char *)lowest_segments[0] > 0x800000) |
66 | { |
67 | // an offset is needed because ld-linux also |
68 | // tends to put stuff here |
69 | lowest_segments[1] = (void *)(start - 0x20000); |
70 | } |
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71 | } |
72 | |
73 | #if 0 |
74 | rewind(f); |
75 | char buff[256]; |
76 | while (fgets(buff, sizeof(buff), f)) |
77 | fputs(buff, stdout); |
78 | #endif |
79 | fclose(f); |
80 | |
4d045184 |
81 | // remove self from preload, further commands (from system() and such) |
82 | // will be handled by ginge_prep. |
83 | unsetenv("LD_PRELOAD"); |
7000b522 |
84 | unsetenv("LD_LIBRARY_PATH"); |
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85 | |
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86 | emu_init(lowest_segments, 1); |
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87 | } |
88 | |
499bf01c |
89 | // vim:shiftwidth=2:expandtab |