From: Nozomu Ando <nand@mac.com>
Subject: [Mac OS X] a patch for binary compatibility issue.
Date: Sun, 08 May 2005 02:54:20 +0900 [thread overview]
Message-ID: <86oebmdir7.fsf@almi.jk.homeunix.org> (raw)
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Hello all,
The binary of current emacs on Mac OS X depends on internal
implementation of system library. On Mac OS X 10.3, we cannot invoke
emacs which is unexec'ed on Mac OS X 10.2.8, because
malloc_default_zone()->size returns incorrect value
(in unexec_realloc()).
The attached patch solves this problem. Moreover, emacs compiled
on Mac OS X 10.3 works for me on Mac OS X 10.4.
It assumes that return value of malloc() is multiple of 16 and
assumes that emacs requires only it is multiple of 8 (even when
USE_LSB_TAG).
It also changes ptr_in_unexec_regions() for efficiency.
---
2005-05-08 Nozomu Ando <nand@mac.com>
* unexmacosx.c: Include assert.h.
(MACOSX_MALLOC_MULT16): Define to 1 if not already defined.
(unexec_malloc_header_t): Add typedef.
(ptr_in_unexec_regions): Define if MACOSX_MALLOC_MULT16.
(unexec_malloc): Add assert. Malloc with struct
unexec_malloc_header and record size on it if !in_dumped_exec.
(unexec_realloc): Add assert. Use recorded size if in_dumped_exec
&& old_ptr is malloc'ed before unexec. Record new_size if
!in_dumped_exec.
(unexec_free): Free with struct unexec_malloc_header.
---
Best Regards,
Nozomu Ando
---
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