Date: Sat, 11 Mar 1995 22:30:01 -0800 From: dave@prlng.co.uk To: freebsd-bugs Subject: gnu/240: Fix for gdb to read stack from core dump Message-ID: <199503120630.WAA07957@freefall.cdrom.com> In-Reply-To: Your message of Sat, 11 Mar 1995 16:02:08 GMT <199503111602.QAA01388@severn.prolingua.co.uk>
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>Number: 240
>Category: gnu
>Synopsis: gdb does not correctly find the stack in a core dump
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs (FreeBSD bugs mailing list)
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Mar 11 22:30:01 1995
>Originator: Dave Matthews
>Organization:
Prolingua Ltd
>Release: FreeBSD 2.0-RELEASE i386
>Environment:
>Description:
Gdb was using the wrong addresses for the location of the stack when
examining a core dump, so it wasn't possible to see a proper stack
trace.
>How-To-Repeat:
>Fix:
Apply the diffs below. The previous values were right, I think, for older
versions of FreeBSD, but these new ones seem correct for FreeBSD 2.0.
diff -c /usr/src/gnu/usr.bin/gdb/bfd/sysdep.h{.ORIG,}
*** /usr/src/gnu/usr.bin/gdb/bfd/sysdep.h.ORIG Thu Mar 2 19:45:51 1995
--- /usr/src/gnu/usr.bin/gdb/bfd/sysdep.h Thu Mar 2 21:14:02 1995
***************
*** 27,34 ****
(u.u_kproc.kp_eproc.e_vm.vm_maxsaddr + MAXSSIZ), which should work on
both BSDI and 386BSD, but that is believed not to work for BSD 4.4. */
! #ifdef __bsdi__
/* This seems to be the right thing for BSDI. */
#define HOST_STACK_END_ADDR USRSTACK
#else
/* This seems to be the right thing for 386BSD release 0.1. */
--- 27,35 ----
(u.u_kproc.kp_eproc.e_vm.vm_maxsaddr + MAXSSIZ), which should work on
both BSDI and 386BSD, but that is believed not to work for BSD 4.4. */
! #if (defined(__bsdi__) | defined(__FreeBSD__))
/* This seems to be the right thing for BSDI. */
+ /* ..and also for FreeBSD, at least FreeBSD > 2. */
#define HOST_STACK_END_ADDR USRSTACK
#else
/* This seems to be the right thing for 386BSD release 0.1. */
diff -c /usr/src/gnu/usr.bin/gdb/bfd/trad-core.c{.ORIG,}
*** /usr/src/gnu/usr.bin/gdb/bfd/trad-core.c.ORIG Fri Jun 10 14:33:39 1994
--- /usr/src/gnu/usr.bin/gdb/bfd/trad-core.c Thu Mar 2 22:11:17 1995
***************
*** 192,198 ****
--- 192,200 ----
#else
core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
#endif
+ #ifndef __FreeBSD__
/* a hack, but it works for FreeBSD !! */
+ /* Actually, it's not needed for FreeBSD 2.0, only for older versions. */
#include <vm/vm_param.h>
/* this should really be in <vm/vm_param.h>, but somebody forgot it */
#ifndef vm_page_size
***************
*** 200,205 ****
--- 202,209 ----
#endif
#define HOST_STACK_START_ADDR trunc_page(u.u_kproc.kp_eproc.e_vm.vm_maxsaddr \
+ MAXSSIZ - ctob(u.u_ssize))
+ #endif
+
#ifdef HOST_STACK_START_ADDR
core_stacksec (abfd)->vma = HOST_STACK_START_ADDR;
#else
>Audit-Trail:
>Unformatted:
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