| commit | 1d153a3388b150b8aeedde32242db86b79c45473 | |
| author | Peter Maydell <peter.maydell@linaro.org> | |
| Fri, 3 Mar 2017 15:50:31 +0000 (3 15:50 +0000) | ||
| committer | Peter Maydell <peter.maydell@linaro.org> | |
| Tue, 7 Mar 2017 14:33:51 +0000 (7 14:33 +0000) | ||
| tree | 64fe1731167f5d3c143b0f40b318b23fbc2a6148 | treesnapshot (tar.gz zip) |
| parent | 2e3883d03df167b15f2acc5345eb9a7e0150a062 | commitdiff |
disas/microblaze: Avoid unintended sign extension
In read_insn_microblaze() we assemble 4 bytes into an 'unsigned
long'. If 'unsigned long' is 64 bits and the high byte has its top
bit set, then C's implicit conversion from 'unsigned char' to 'int'
for the shift will result in an unintended sign extension which sets
the top 32 bits in 'inst'. Add casts to prevent this. (Spotted by
Coverity, CID 1005401.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1488556233-31246-5-git-send-email-peter.maydell@linaro.org
In read_insn_microblaze() we assemble 4 bytes into an 'unsigned
long'. If 'unsigned long' is 64 bits and the high byte has its top
bit set, then C's implicit conversion from 'unsigned char' to 'int'
for the shift will result in an unintended sign extension which sets
the top 32 bits in 'inst'. Add casts to prevent this. (Spotted by
Coverity, CID 1005401.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1488556233-31246-5-git-send-email-peter.maydell@linaro.org
| disas/microblaze.c | diffblobblamehistory |