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I have tested on my box |
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wakka ~ # nm /bin/kill |grep __guard |
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nm: /bin/kill: no symbols |
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wakka ~ # readelf -s /bin/kill | grep __guard |
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53: 00000000 4 OBJECT GLOBAL DEFAULT UND __guard@GLIBC_2.3.2 (5) |
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nm seems not work(or not with these options), try with readelf |
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Chris Smart wrote: |
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> thanks for this... my amd64 doesn't seem to have used -fstack-protector |
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> |
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> cephas ~ # nm /bin/kill |grep __stack_smash_handler |
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> nm: /bin/kill: no symbols |
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> |
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> cephas ~ # nm /bin/kill |grep __guard |
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> nm: /bin/kill: no symbols |
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> |
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> is it something that I have to specify in my CFLAGS? |
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> |
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> ie: CFLAGS="-O2 -march=opteron -pipe -fomit-frame-pointer |
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> -fstack-protector" ? |
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> |
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> I *though* it was already included in gcc 3.4 for opterons.. |
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> |
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> ta |
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> |
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> Kevin F. Quinn wrote: |
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> |
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>> Mike Frysinger wrote: |
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>> |
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>> |
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>>> On Wednesday 11 May 2005 08:04 am, Rob Holland wrote: |
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>>> |
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>>> |
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>>>> On Wed, May 11, 2005 at 10:51:18AM +0100, Pedro Venda wrote: |
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>>>> |
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>>>> |
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>>>>> I'm left with a doubt: how to find out if some binary was |
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>>>>> compiled with -fstack-protector gcc option? |
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>>>>> |
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>>>> |
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>>>> I think: nm /bin/foo|grep guard |
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>>>> should tell you, if you see a guard symbol, it has ssp. |
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>>>> |
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>>> |
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>>> nm doesnt always worked (it'll fail on stripped binaries), but |
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>>> `readelf > -s foo | grep guard` should work fine |
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>>> |
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>> |
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>> |
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>> '__guard' would be better than 'guard', to avoid false positives. |
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>> Personally I use '__stack_smash_handler' |
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>> |
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>> Kev. |
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>> |
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>> |
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>> |
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>> |
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>> |
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>> |
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Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org |
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fQT/09zACkewaP2X1OtygJc= |
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=4vxV |
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