Mail Archives: djgpp/2000/12/27/16:07:23
| From: | "Alex Oleynikov" <alex AT compuweigh DOT com>
|
| To: | "DJGPP Mail List" <djgpp AT delorie DOT com>
|
| Subject: | libc _free exception
|
| Date: | Wed, 27 Dec 2000 16:04:01 -0500
|
| Message-ID: | <NEBBKABEDKFPFBKEMBFOAELOCAAA.alex@compuweigh.com>
|
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| Reply-To: | djgpp AT delorie DOT com
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Hi everybody,
Seems, I have a trouble with function free() in libc. In my app I use
several different libraries (MGUI, pmcom, grx20, ctx2jpg) and sometimes it
GPFs on me (General Protection Fault in RMCB at eip=10cf; … error=00a4)
Investigating the call frame traceback EIPs, I found that it is always
function free(), who causes the exception, called from within on of the
libraries (MGUI). Particularly, this line of code inside it:
…
<_free + 0xaa > mov %ecx, %ebx
…
According to the exception info DJGPP shows, ecx = 00000000 at this moment.
Does anybody know what may be the problem? Maybe the different libraries I
am using are compiled with different versions of libc?
Any help is greatly appreciated.
Alex
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<div class=3DSection1>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'>Hi
everybody,<o:p></o:p></span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'><![if =
!supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'>Seems, I
have a trouble with function free() in libc. In my app I use several =
different
libraries (MGUI, pmcom, grx20, ctx2jpg) and sometimes it GPFs on me =
(General
Protection Fault in RMCB at eip=3D10cf; … =
error=3D00a4)<o:p></o:p></span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'>Investigating
the call frame traceback EIPs, I found that it is always function =
free(), who
causes the exception, called from within on of the libraries (MGUI).
Particularly, this line of code inside =
it:<o:p></o:p></span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'>…<o:p></o:p></=
span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'><_free +
0xaa > mov %ecx, %ebx<o:p></o:p></span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'>…<o:p></o:p></=
span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'><![if =
!supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'>According
to the exception info DJGPP shows, ecx =3D <span style=3D"mso-spacerun:
yes"> </span>00000000 at this =
moment.<o:p></o:p></span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'>Does
anybody know what may be the problem? Maybe the different libraries I am =
using are
compiled with different versions of =
libc?<o:p></o:p></span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'><![if =
!supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'>Any help is
greatly appreciated.<o:p></o:p></span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'><![if =
!supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=3DMsoNormal><span class=3DEmailStyle20><font size=3D2 =
color=3Dblack
face=3DArial><span =
style=3D'font-size:10.0pt;mso-bidi-font-size:12.0pt'>Alex<o:p></o:p></spa=
n></font></span></p>
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