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POglibc function strtoull() failure
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2013-10-01T14:48:16.950
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I am facing issue with c library function strtoull which is returning me wrong output. <pre><code> int main(int argc, char *argv[]) { unsigned long long int intValue; if(atoi(argv[2]) == 1) { intValue = strtoull((const char *)argv[1], 0, 10 ); } else { // ... } printf("intValue of %s is %llu \n", argv[1], intValue); return 0; } </code></pre> I built them and generated 32 and 64 bit executables as str32_new and str64_new. But the output received from 32 bit exe is errorneous as wrong number is returned: strtoull should had returned me number 5368709120 for the passed string "5368709120" but it returned me 1073741824. <pre><code># ./str32_new "5368709120" 1 intValue of 5368709120 is 1073741824 </code></pre> I note that when I decrease one character from string then it shows proper output. <pre><code># ./str32_new "536870912" 1 intValue of 536870912 is 536870912 </code></pre> glibc attached to 32 bit exe is <pre><code> # readelf -Wa /home/str32_new | grep strt [39] .shstrtab STRTAB 00000000 002545 000190 00 0 0 1 [41] .strtab STRTAB 00000000 0032f8 0002a4 00 0 0 1 0804a014 00000607 R_386_JUMP_SLOT 00000000 strtoull 6: 00000000 0 FUNC GLOBAL DEFAULT UND strtoull@GLIBC_2.0 (2) 55: 00000000 0 FILE LOCAL DEFAULT ABS strtoull.c 75: 00000000 0 FUNC GLOBAL DEFAULT UND strtoull@@GLIBC_2.0 77: 08048534 915 FUNC GLOBAL DEFAULT 15 my_strtoull </code></pre> glibc attached to 64 bit exe is <pre><code> # readelf -Wa /home/str64_new | grep strt [39] .shstrtab STRTAB 0000000000000000 001893 000192 00 0 0 1 [41] .strtab STRTAB 0000000000000000 002cd0 00029b 00 0 0 1 0000000000601028 0000000700000007 R_X86_64_JUMP_SLOT 0000000000000000 strtoull + 0 7: 0000000000000000 0 FUNC GLOBAL DEFAULT UND strtoull@GLIBC_2.2.5 (2) 57: 0000000000000000 0 FILE LOCAL DEFAULT ABS strtoull.c 73: 00000000004006cc 804 FUNC GLOBAL DEFAULT 15 my_strtoull 82: 0000000000000000 0 FUNC GLOBAL DEFAULT UND strtoull@@GLIBC_2.2.5 </code></pre> 64 bit exe shows proper output but on some system it too behaves abnormally. Why is the strtoull in 32 bit exe behaving so and how to resolve this issue?
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<c><string><glibc>
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glibc function strtoull() failure
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