From owner-freebsd-current  Thu Mar 28  3:31:19 2002
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Date: Thu, 28 Mar 2002 22:31:36 +1100 (EST)
From: Bruce Evans <bde@zeta.org.au>
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To: Anders Nor Berle <debolaz@debolaz.com>
Cc: current@FreeBSD.ORG
Subject: Re: linux_base-7 installation breaks with zlib 1.1.4
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On Thu, 28 Mar 2002, Anders Nor Berle wrote:

> linux_base-7 (And most likely other ports as well) seems to be broken after zlib 1.1.4
> was committed to -current. Zlib was made with fresh source from today (28.3) and rpm
> recompiled.
>
> ===>  Installing for linux_base-7.1_2
> kern.fallback_elf_brand: 3 -> 3
> glibc-common-2.2.2-10.i386.rpm
> Segmentation fault - core dumped
> *** Error code 139
>
> Not particulary promising when you look at the core backtrace from rpm...
>
> #0  0x8090a3f in inflate_codes (s=0x8150380, z=0x8154b00, r=0)
> at /usr/src/lib/libz/infcodes.c:203
> 203           while (f < s->window)             /* modulo window size-"while" instead
> */ (gdb) bt
> #0  0x8090a3f in inflate_codes (s=0x8150380, z=0x8154b00, r=0)
> at /usr/src/lib/libz/infcodes.c:203

I use the following quick fix for the corresponding core dump in man and zgrep.

%%%
Index: infcodes.c
===================================================================
RCS file: /home/ncvs/src/lib/libz/infcodes.c,v
retrieving revision 1.3
diff -u -2 -r1.3 infcodes.c
--- infcodes.c	11 Mar 2002 22:36:26 -0000	1.3
+++ infcodes.c	19 Mar 2002 00:35:28 -0000
@@ -201,6 +201,11 @@
     case COPY:          /* o: copying bytes in window, waiting for space */
       f = q - c->sub.copy.dist;
-      while (f < s->window)             /* modulo window size-"while" instead */
-        f += s->end - s->window;        /* of "if" handles invalid distances */
+      {
+      /* XXX work around a gcc bug. */
+      volatile inflate_blocks_statef *s1 = s;
+
+      while (f < s1->window)            /* modulo window size-"while" instead */
+        f += s1->end - s1->window;      /* of "if" handles invalid distances */
+      }
       while (c->len)
       {
%%%

Bruce


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