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Review request for Default.


Repository: gem5


Description
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syscall_emu: Corrected a bug on the syscall "read()".
Read() should not write anything when returning 0 (EOF). This patch does not 
correct the same bug occuring for :

nbr_read=read(file, buf, nbytes) 

When nbr_read<nbytes, nbytes bytes are copied into the virtual RAM instead of 
nbr_read. If buf is smaller than nbytes, a page fault occurs, even if buf is in 
fact bigger than nbr_read.


Diffs
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  src/sim/syscall_emul.cc cdb94f2332a6 

Diff: http://reviews.gem5.org/r/3582/diff/


Testing
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Works with CERE codelets (https://github.com/benchmark-subsetting/cere), 
correcting the issue when replacing dumps in memory.


Thanks,

Nicolas Derumigny

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