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Differential D10047

fill x86 padding with INT3 instead of NOP
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Authored by emaste on Mar 18 2017, 6:25 PM.
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jhb
kib
dim
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rS315522: use INT3 instead of NOP for x86 binary padding
Summary

We should never end up executing the inter-function padding, so we're better off faulting than silently carrying on to whatever function happens to be next.

LLD will do this by default (although it currently pads with zeros).

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rS FreeBSD src repository - subversion
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emaste created this revision.Mar 18 2017, 6:25 PM
dim accepted this revision.Mar 18 2017, 8:17 PM

Yes, that seems like a good idea to me.

This revision is now accepted and ready to land.Mar 18 2017, 8:17 PM
kib accepted this revision.Mar 18 2017, 10:42 PM
Closed by commit rS315522: use INT3 instead of NOP for x86 binary padding (authored by emaste). · Explain WhyMar 19 2017, 12:22 AM
This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

PathSize
head/
contrib/
binutils/
ld/
emulparams/
2 lines
2 lines
sys/
conf/
6 lines
6 lines

Diff 26398

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head/contrib/binutils/ld/emulparams/elf_i386.sh

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head/contrib/binutils/ld/emulparams/elf_x86_64.sh

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head/sys/conf/ldscript.amd64

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head/sys/conf/ldscript.i386

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