<html>

    <head>

      <base href="http://llvm.org/bugs/" />

    </head>

    <body><table border="1" cellspacing="0" cellpadding="8">

        <tr>

          <th>Bug ID</th>

          <td><a class="bz_bug_link 

          bz_status_NEW "

   title="NEW --- - Integrated assembler segfault"

   href="http://llvm.org/bugs/show_bug.cgi?id=20060">20060</a>

          </td>

        </tr>

        <tr>

          <th>Summary</th>

          <td>Integrated assembler segfault

          </td>

        </tr>

        <tr>

          <th>Product</th>

          <td>clang

          </td>

        </tr>

        <tr>

          <th>Version</th>

          <td>trunk

          </td>

        </tr>

        <tr>

          <th>Hardware</th>

          <td>All

          </td>

        </tr>

        <tr>

          <th>OS</th>

          <td>All

          </td>

        </tr>

        <tr>

          <th>Status</th>

          <td>NEW

          </td>

        </tr>

        <tr>

          <th>Severity</th>

          <td>normal

          </td>

        </tr>

        <tr>

          <th>Priority</th>

          <td>P

          </td>

        </tr>

        <tr>

          <th>Component</th>

          <td>Driver

          </td>

        </tr>

        <tr>

          <th>Assignee</th>

          <td>unassignedclangbugs@nondot.org

          </td>

        </tr>

        <tr>

          <th>Reporter</th>

          <td>brad@comstyle.com

          </td>

        </tr>

        <tr>

          <th>CC</th>

          <td>llvmbugs@cs.uiuc.edu

          </td>

        </tr>

        <tr>

          <th>Classification</th>

          <td>Unclassified

          </td>

        </tr></table>

      <p>

        <div>

        <pre>Created <span class=""><a href="attachment.cgi?id=12668" name="attach_12668" title="preprocessed assembly">attachment 12668</a> <a href="attachment.cgi?id=12668&action=edit" title="preprocessed assembly">[details]</a></span>

preprocessed assembly

Trying to build the OpenBSD amd64 bootstrap bits I noticed the integrated

assembler was crashing when trying to build biosboot(8)...

clang  -m32  -fno-pie  -DLOADADDR=0x40000 -DLINKADDR=0x40120

-DBOOTMAGIC=0xc001d00d 

-I/usr/src/src/sys/arch/amd64/stand/biosboot/../../../..

-I/usr/src/src/sys/arch/amd64/stand/biosboot/../libsa -I.

-I/usr/src/src/sys/arch/amd64/stand/biosboot -c

/usr/src/src/sys/arch/amd64/stand/biosboot/biosboot.S

Stack dump:

0.      Program arguments: /usr/local/bin/clang-3.5 -cc1as -triple

i386-unknown-openbsd5.5 -filetype obj -main-file-name biosboot.S -target-cpu

i486 -fdebug-compilation-dir /usr/src/src/sys/arch/amd64/stand/biosboot/obj

-dwarf-debug-producer clang version 3.5 (trunk) -o biosboot.o

/tmp/biosboot-74d230.s 

1.      Program arguments: -triple i386-unknown-openbsd5.5 -filetype obj

-main-file-name biosboot.S -target-cpu i486 -fdebug-compilation-dir

/usr/src/src/sys/arch/amd64/stand/biosboot/obj -dwarf-debug-producer clang

version 3.5 (trunk) -o biosboot.o /tmp/biosboot-74d230.s 

clang-3.5: error: unable to execute command: Segmentation fault (core dumped)

clang-3.5: error: clang integrated assembler command failed due to signal (use

-v to see invocation)

clang version 3.5 (trunk)

Target: i386-unknown-openbsd5.5

Thread model: posix

clang-3.5: note: diagnostic msg: PLEASE submit a bug report to

<a href="http://llvm.org/bugs/">http://llvm.org/bugs/</a> and include the crash backtrace, preprocessed source, and

associated run script.

clang-3.5: note: diagnostic msg: 

********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:

Preprocessed source(s) and associated run script(s) are located at:

clang-3.5: note: diagnostic msg: /tmp/biosboot-9efc5a.S

clang-3.5: note: diagnostic msg: /tmp/biosboot-9efc5a.sh

clang-3.5: note: diagnostic msg:

(gdb) bt full

#0  memset (dst=0x1fe4c0b29b84, c=0, n=18446744073709550467) at

/usr/src/lib/libc/string/memset.c:43

        d = (unsigned char *) 0x1fe4c0b2a000 <Address 0x1fe4c0b2a000 out of

bounds>

#1  0x00001fe2bffa6b83 in llvm::MCObjectStreamer::EmitFill () from

/usr/local/bin/clang-3.5