linux 1.2.9 elf is released.

linux 1.2.9 elf is released.

Post by Ben A Lindstr » Thu, 08 Jun 1995 04:00:00



I'm assuming that in the 1.3.x that somewhere down the line Linus will
directly support ELF without extra patches.

Am I correct? (Oh I hope. =-)

: Hi,

: This is a new ELF patch, 1.2.9.elf, for Linux 1.2.9. It makes Linux
: 1.2.9 compatible with both ELF and a.out formats. You need modules
: 1.2.8 or newer to use module in ELF.

: You can edit arch/i386/Makefile to choose which binary format you want
: to compile the Linux kernel in. I only tested it on my machine.

: I also added the kernel ELF core dump, which is taken from the

: there may be an ELF bug somewhere:

: --foo.c--
: #include <stdio.h>

: main ()
: {
:   const char * const sd1 = "1.8976931348623157e+308";

:   *sd1 = 1;
: }
: ----

: Before 1.2.9.elf, I couldn't get it core dump under ELF if I used
: -static. This bug has been fixed in 1.2.9.elf.

: You also need a gdb patch to read the ELF core dump. There are two
: gdb patches: one for shared library and the other for ELF core.
: We need someone to put two together. I can put it on tsx-11 and
: sunsite. Drop me a line if you can help out. Thanks.

: This patch needs the following packages from me:

: 1. binutils 2.5.2l.17 or newer.
: 2. libc 5.0.9.
: 3. gcc 2.6.3/ELF.

: The primary ftp sites for the compiler/C library are tsx-11.mit.edu
: under pub/linux/packages/GCC and sunsite.unc.edu under pub/Linux/GCC.

: After applying the patch, you can compile the kernel in ELF:

: # cd linux
: # gzip -dc ...../linux-1.2.9.elf.diff.gz | patch -p2
: # make zImage

: The resulting arch/i386/boot/zImage is compiled in ELF.

: After editing arch/i386/Makefile, you can compile the kernel in a.out.

: H.J.

: 06/06/95

 
 
 

1. I am puzzled by the way Linux releases memory, please explain.

When I look at the output of "free" in an untax Linux system it typically
resembles the following:

                    total       used       free         shared      buffers
   cached
Mem:         63104      17592      45512      20240       1060       9000
-/+ buffers/cache:       7532      55572
Swap:        68540          0      68540

What puzzles me is when I loaded a few programs, Netscape, Emacs, etc,
and then later exit from each of these programs. My output from "free" is
not anyway close to the original untax state. In fact, under the "used"
column, it sometimes shows +50M when I really don't have any applications
running at all! What exactly is going on? Can someone explain to me the
output of free? Should the numbers add up? Is Linux caching something?
Just how does Linux calculate when to release or cache memory?

Thanks
Stephen

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