980f45b693
Background: Originally, the EH labels were placed on the permanent obstack, which could end up using a lot of memory (for heavy inlining) since inlined labels also needed to be permanent as a result of this. This was changed in Wed Dec 9 09:12:40 1998 Andrew MacLeod <amacleod@cygnus.com> * except.h (struct handler_info): Add handler_number field. * except.c (gen_exception_label): EH labels no longer need to be on the permanent obstack. (get_new_handler): Set the label number field. (output_exception_table_entry): Regenerate handler label reference from the label number field. (init_eh): Remove a blank line. * integrate.c (get_label_from_map): Labels no longer need to be on the permanent obstack. by using the label numbers instead of the label structures in most cases. The operative word here is "most" cases. Addresses to the EH RTX was still used in (at least) flow.c, that now used freed memory. Oops. For this to happen, the freed address of the RTX representing a EH label must be reused for a new label that is located in dead code. delete_block() will then see that this RTX is mentioned in the EH table, and (incorrectly) remove the exception handler. This might be seen when, for example, compiling src/gnu/dist/groff/src/roff/troff/node.cc for m68k. |
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| .. | ||
| autoconf | ||
| bc | ||
| cvs | ||
| diffutils | ||
| gawk | ||
| gettext | ||
| grep | ||
| groff | ||
| map-mbone | ||
| mrinfo | ||
| mrouted | ||
| mtrace | ||
| postfix | ||
| sendmail | ||
| tar | ||
| texinfo | ||
| toolchain | ||
| README.toolchain | ||
$NetBSD: README.toolchain,v 1.3 2001/10/15 18:28:28 bjh21 Exp $
HOW TO BUILD A CROSS COMPILER
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[Section to be written.]
See also: http://www.netbsd.org/Documentation/cross/
IMPORTED VERSIONS
~~~~~~~~~~~~~~~~~
The following software is in gnusrc/gnu/dist/toolchain, in a unified build
structure:
gcc-2.95.3
binutils-2.11.2
gdb-5.0
IMPORT STEPS
~~~~~~~~~~~~
1. All distributions were unpacked and all `.cvsignore' files were
removed.
2. All files in gcc's `include' top level directory were removed from
binutils's `include' top level directory (these are the libiberty
include files).
cd gcc-*/include; for f in *; do rm -f ../../binutils-*/include/$f; done
3. The gcc distribution was imported in one shot into
gnusrc/gnu/dist/toolchain, including the recursive build structure.
4. The binutils distribution was stripped down to the following directories,
with no files at the top level:
bfd, binutils, gas, gprof, include, intl, ld, opcodes
5. Binutils was imported into gnusrc/gnu/dist/toolchain, which included
only the subdirectories above.
6. The gdb distribution was stripped down to the following directories,
with no files at the top level:
gdb, mmalloc, readline, sim
7. Gdb was imported into gnusrc/gnu/dist/toolchain, which included only
the subdirectories above.