From: £ukasz <blurrpp@yahoo.com>
To: linux-assembly@vger.kernel.org
Subject: multithreating HOWTO ? :)
Date: Sat, 22 Aug 2009 09:48:08 -0700 (PDT) [thread overview]
Message-ID: <779223.59642.qm@web50307.mail.re2.yahoo.com> (raw)
Hi All.
I'm trying to start writing multithread programs with assembler (no pthreads), i want to just ask what is wrong in folowing simple code:
.section .data
signal1:
.quad 1
signal2:
.quad 1
x:
.quad 0
y:
.quad 0
.section .text
.globl _start
_start:
nop
movq $2,%rax # sys_fork
xorq %rbx,%rbx
int $0x80
cmpq $0,%rax
jl end
cmpq $0,%rax
jg parent # jump if parent
child:
movq $100,x
movq $0,signal1
1:
cmpq $0,signal2
jnz 1b
jmp end
parent:
movq $100,y
movq $0,signal2
1:
cmpq $0,signal1
jnz 1b # INF. LOOP ?
end:
movq x,%rbx
addq y,%rby
movq $1,%rax
int $0x80
Program stacks at parent part in infinite loop waiting for "signal1" change to 0. Anybody knows how to write it properly with using two threads? Thanks in advance.
Lukas
next reply other threads:[~2009-08-22 16:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-22 16:48 £ukasz [this message]
2009-08-23 10:29 ` Appendix: multithreating HOWTO ? :) £ukasz
2009-08-23 13:35 ` Claudio Fontana
2009-08-23 15:04 ` Frank Kotler
2009-08-23 15:23 ` Claudio Fontana
2009-08-23 16:17 ` £ukasz
2009-08-23 19:18 ` Frank Kotler
2009-08-23 21:02 ` linuxasm
2009-08-23 19:13 ` £ukasz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=779223.59642.qm@web50307.mail.re2.yahoo.com \
--to=blurrpp@yahoo.com \
--cc=linux-assembly@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).