From:	"±θΗΠΑΦ" <kimguy00 AT orgio DOT net>
Newsgroups:	comp.os.msdos.djgpp
Subject:	problem in inline assembler
Date:	Tue, 28 Aug 2001 16:56:41 +0900
Organization:	Inet Internet Services
Lines:	23
Message-ID:	<9mfivi$j0g$1@news.nuri.net>
NNTP-Posting-Host:	203.231.145.146
X-Trace:	news.nuri.net 998985522 19472 203.231.145.146 (28 Aug 2001 07:58:42 GMT)
X-Complaints-To:	abuse AT nuri DOT net
NNTP-Posting-Date:	28 Aug 2001 07:58:42 GMT
X-Priority:	3
X-MSMail-Priority:	Normal
X-Newsreader:	Microsoft Outlook Express 5.50.4522.1200
X-MimeOLE:	Produced By Microsoft MimeOLE V5.50.4522.1200
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Hello !
I need a somebody's help.
Now I'm studing inline asm.
and I thought %0, %1, %2.. are just a kind of a mapping sequencely.
So I thought %0 is gate_addr, %1 is dpl, %2 is type
but I think it's doesn't work.

please help me
How can I understand a source stuff below.


#define _set_gate(gate_addr,type,dpl,addr) \
__asm__ __volatile__ ("movw %%dx,%%ax\n\t" \
 "movw %2,%%dx\n\t" \
 "movl %%eax,%0\n\t" \
 "movl %%edx,%1" \
 :"=m" (*((long *) (gate_addr))), \
  "=m" (*(1+(long *) (gate_addr))) \
 :"i" ((short) (0x8000+(dpl<<13)+(type<<8))), \
  "d" ((char *) (addr)),"a" (KERNEL_CS << 16) \
 :"ax","dx")

- Raw text -