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From "Gregory Shimansky (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HARMONY-5320) [drlvm][NCAI][encoder] Decoder incorrectly parses special case with modrm.mod=0 and sib.base=5
Date Tue, 18 Dec 2007 12:45:43 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-5320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gregory Shimansky reassigned HARMONY-5320:
------------------------------------------

    Assignee: Gregory Shimansky

> [drlvm][NCAI][encoder] Decoder incorrectly parses special case with modrm.mod=0 and sib.base=5
> ----------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-5320
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5320
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>         Environment: All
>            Reporter: Ilya Berezhniuk
>            Assignee: Gregory Shimansky
>         Attachments: H-5320.patch
>
>
> Decoder incorrectly parses SIB byte when SIB.base == 5 and ModR/M.mod == 0.
> It's special case when base is absent but disp32 is present.
> This bug affects JVMTI disassembler. I've met the bug using NCAI interface when disassembling
native code.
> Probably this bug will not occur for JVMTI itself because JIT does not produce such instruction.
> Suggested patch fixes this issue.

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