[Bug 39993] New: OllyDbg fails to change some registers

List overview All Threads

newer

older

[Bug 23094] New: R6034 runtime...

[Bug 42353] New: OllyDbg Step In...

wine-bugs＠winehq.org

16 Jan 2016 16 Jan '16

11:04 a.m.

https://bugs.winehq.org/show_bug.cgi?id=39993

Bug ID: 39993 Summary: OllyDbg fails to change some registers Product: Wine Version: 1.9.0 Hardware: x86 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: kernel32 Assignee: wine-bugs@winehq.org Reporter: b7.10110111@gmail.com Distribution: ---

If you try to set some registers in OllyDbg while debugging an application, it'll reset them to original values after single step. This must mean that its write request has failed.

To reproduce:

1. Run OllyDbg (2.x) 2. File->Open, choose any PE file, e.g. Test.exe from OllyDbg distribution 3. Press space bar, assemble something like `dw 0xfeeb` to make sure no registers are changed on single step 4. Try to change any of the following registers (others work correctly): * ST2 or any other FPU data register * FST * FCW * MXCSR * data register tags via right clicking on "empty" and selecting "zero" 5. Single step (pressing F7) 6. See the changed registers return to original values, i.e. fail to actually change

-- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

Show replies by date

wine-bugs＠winehq.org

16 Jan 16 Jan

11:05 a.m.

New subject: [Bug 39993] OllyDbg fails to change some registers

https://bugs.winehq.org/show_bug.cgi?id=39993

Ruslan Kabatsayev b7.10110111@gmail.com changed:

-- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

wine-bugs＠winehq.org

8:49 p.m.

New subject: [Bug 39993] OllyDbg fails to change some registers

https://bugs.winehq.org/show_bug.cgi?id=39993

Sebastian Lackner sebastian@fds-team.de changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |sebastian@fds-team.de

-- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

wine-bugs＠winehq.org

17 Jan 17 Jan

8:54 p.m.

New subject: [Bug 39993] OllyDbg fails to change some registers

https://bugs.winehq.org/show_bug.cgi?id=39993

Ruslan Kabatsayev b7.10110111@gmail.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Component|kernel32 |wineserver

--- Comment #1 from Ruslan Kabatsayev b7.10110111@gmail.com --- It actually seems to be wineserver which has the bug, not kernel32, since kernel32 only forwards the context to ntdll with SetThreadContext, and it to the server with NtSetContextThread, and in this case self!=0.

-- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

wine-bugs＠winehq.org

1 Feb 1 Feb

8:38 a.m.

New subject: [Bug 39993] OllyDbg fails to change some registers

https://bugs.winehq.org/show_bug.cgi?id=39993

--- Comment #2 from Ruslan Kabatsayev b7.10110111@gmail.com --- Still present in wine-2.0-235-g2dd0fb8.

-- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

wine-bugs＠winehq.org

2 Apr 2 Apr

7:16 a.m.

New subject: [Bug 39993] OllyDbg fails to change some registers

https://bugs.winehq.org/show_bug.cgi?id=39993

--- Comment #3 from Ruslan Kabatsayev b7.10110111@gmail.com --- Still reproduces with wine-2.5.

To make sure you don't hit bug 42353, change step 3 in instructions to reproduce to assembly of `dd 0x90feeb90` instead of `dw 0xfeeb`.

-- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

wine-bugs＠winehq.org

30 Aug 30 Aug

7:10 p.m.

New subject: [Bug 39993] OllyDbg fails to change some registers

https://bugs.winehq.org/show_bug.cgi?id=39993

--- Comment #4 from Ruslan Kabatsayev b7.10110111@gmail.com --- Still present in wine-2.15-74-g083e61f. Also reproduces with x32dbg.

-- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

wine-bugs＠winehq.org

7:11 p.m.

New subject: [Bug 39993] OllyDbg fails to change some registers

https://bugs.winehq.org/show_bug.cgi?id=39993

Ruslan Kabatsayev b7.10110111@gmail.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Keywords| |source

--- Comment #5 from Ruslan Kabatsayev b7.10110111@gmail.com --- x32dbg is open-source and reproduces this bug too, so adding "source" keyword.

-- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

wine-bugs＠winehq.org

3 Dec 3 Dec

11:28 a.m.

New subject: [Bug 39993] OllyDbg fails to change some registers

https://bugs.winehq.org/show_bug.cgi?id=39993

--- Comment #6 from Ruslan Kabatsayev b7.10110111@gmail.com --- Still present in wine-2.22-158-g47e9e91.

-- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

WineHQ Bugzilla

11 Feb 11 Feb

4:16 p.m.

New subject: [Bug 39993] OllyDbg 2.x: Manually changed FPU registers are reset to original values after single step (F7)

https://bugs.winehq.org/show_bug.cgi?id=39993

Anastasius Focht focht@gmx.net changed:

--- Comment #7 from Anastasius Focht focht@gmx.net --- Hello folks,

this was fixed by commit https://source.winehq.org/git/wine.git/commitdiff/7ee66b29cb52fd3fc18fe2314c... ("ntdll: Send first chance debug event while on signal stack on i386.").

Part of Wine 4.17 release.

Thanks Alexandre

$ sha1sum odbg201.zip d41fe77a2801d38476f20468ab61ddce14c3abb8 odbg201.zip

$ du -sh odbg201.zip 6.7M odbg201.zip

$ wine --version wine-4.16-49-g7ee66b29cb5

Regards

-- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

WineHQ Bugzilla

12 Feb 12 Feb

8:38 p.m.

New subject: [Bug 39993] OllyDbg 2.x: Manually changed FPU registers are reset to original values after single step (F7)

https://bugs.winehq.org/show_bug.cgi?id=39993

Alexandre Julliard julliard@winehq.org changed:

What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |CLOSED

--- Comment #8 from Alexandre Julliard julliard@winehq.org --- Closing bugs fixed in 6.2.

-- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.

1427

Age (days ago)

3281

Last active (days ago)

wine-bugs@winehq.org

10 comments

2 participants

tags (0)

participants (2)

wine-bugs＠winehq.org
WineHQ Bugzilla