| 1 |
BEGIN { |
| 2 |
COUNT = split(ENVIRON["SYMBOLS"], SYMBOLS); |
| 3 |
} |
| 4 |
|
| 5 |
{ |
| 6 |
for (x in SYMBOLS) { |
| 7 |
sym_regex = "^" SYMBOLS[x] "(@|$)" |
| 8 |
if ($8 ~ sym_regex) { |
| 9 |
split($8, symbol_array, /@|@@/); |
| 10 |
|
| 11 |
# Don't add local symbols of versioned libc's |
| 12 |
if (VERSIONED_LIBC && !symbol_array[2]) |
| 13 |
continue; |
| 14 |
|
| 15 |
# We have a versioned libc |
| 16 |
if (symbol_array[2] && !VERSIONED_LIBC) |
| 17 |
VERSIONED_LIBC = 1; |
| 18 |
|
| 19 |
ADD = 1; |
| 20 |
# Check that we do not add duplicates |
| 21 |
for (x in PROCESSED_SYMBOLS) { |
| 22 |
if (x == $8) { |
| 23 |
ADD = 0; |
| 24 |
break; |
| 25 |
} |
| 26 |
} |
| 27 |
|
| 28 |
if (ADD) { |
| 29 |
SYMBOL_LIST[symbol_array[1]] = SYMBOL_LIST[symbol_array[1]] " " $8; |
| 30 |
PROCESSED_SYMBOLS[$8] = $8; |
| 31 |
} |
| 32 |
} |
| 33 |
} |
| 34 |
} |
| 35 |
|
| 36 |
END { |
| 37 |
printf("#ifndef __symbols_h\n"); |
| 38 |
printf("#define __symbols_h\n\n"); |
| 39 |
|
| 40 |
# We use the order in SYMBOLS, as some wrappers depends on others ... |
| 41 |
for (i = 1; i <= COUNT; i++) { |
| 42 |
sym_index = SYMBOLS[i]; |
| 43 |
split(SYMBOL_LIST[sym_index], sym_full_names); |
| 44 |
|
| 45 |
for (x in sym_full_names) { |
| 46 |
split(sym_full_names[x], symbol_array, /@|@@/); |
| 47 |
|
| 48 |
# Defualt symbol have '@@' and not '@', so name it by |
| 49 |
# prepending '__' rather than the symbol version so |
| 50 |
# that we know what the name is in libsandbox.c ... |
| 51 |
# Also do this for non-versioned libc's ... |
| 52 |
if (sym_full_names[x] ~ /@@/ || !symbol_array[2]) { |
| 53 |
sym_real_name = sym_index "_DEFAULT"; |
| 54 |
} else { |
| 55 |
sym_real_name = sym_full_names[x]; |
| 56 |
gsub(/@|\./, "_", sym_real_name); |
| 57 |
} |
| 58 |
|
| 59 |
printf("#define symname_%s \"%s\"\n", sym_real_name, sym_index); |
| 60 |
|
| 61 |
# We handle non-versioned libc's by setting symver_* |
| 62 |
# to NULL ... |
| 63 |
if (!symbol_array[2]) |
| 64 |
printf("#define symver_%s NULL\n", sym_real_name); |
| 65 |
else |
| 66 |
printf("#define symver_%s \"%s\"\n", sym_real_name, |
| 67 |
symbol_array[2]); |
| 68 |
|
| 69 |
printf("%s_decl(%s);\n", sym_index, sym_real_name); |
| 70 |
|
| 71 |
if (symbol_array[2]) { |
| 72 |
# Only add symbol versions for versioned libc's |
| 73 |
if (sym_full_names[x] ~ /@@/) |
| 74 |
printf("default_symbol_version(%s, %s, %s);\n", |
| 75 |
sym_real_name, sym_index, symbol_array[2]); |
| 76 |
else |
| 77 |
printf("symbol_version(%s, %s, %s);\n", |
| 78 |
sym_real_name, sym_index, symbol_array[2]); |
| 79 |
} else { |
| 80 |
# For non-versioned libc's we use strong aliases |
| 81 |
printf("strong_alias(%s, %s);\n", sym_real_name, |
| 82 |
sym_index); |
| 83 |
} |
| 84 |
|
| 85 |
printf("\n"); |
| 86 |
} |
| 87 |
} |
| 88 |
|
| 89 |
printf("#endif /* __symbols_h */\n"); |
| 90 |
} |
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