Date: Sun, 17 Jun 2007 22:43:56 -0700 From: "Ted Mittelstaedt" <tedm@toybox.placo.com> To: "Patil, Kiran" <kiran.patil@intel.com>, <freebsd-questions@freebsd.org> Subject: RE: Need help with GNU assembly Message-ID: <BMEDLGAENEKCJFGODFOCGECICAAA.tedm@toybox.placo.com> In-Reply-To: <4AFE4AEEFA305C4BB82F73F4D819506001B50C43@orsmsx420.amr.corp.intel.com>
next in thread | previous in thread | raw e-mail | index | archive | help
http://asm.sourceforge.net/intro.html > -----Original Message----- > From: owner-freebsd-questions@freebsd.org > [mailto:owner-freebsd-questions@freebsd.org]On Behalf Of Patil, Kiran > Sent: Thursday, June 14, 2007 2:11 PM > To: freebsd-questions@freebsd.org > Cc: Patil, Kiran > Subject: Need help with GNU assembly > > > Hi All, > > > > I am trying to use GNU assembly. I am trying simple thing such as , > moving content of memory location into general purpose register (ax). > > > > I have following code : > > > > struct context { > > > > unsigned long mask[8]; > > } CONTEXT; > > > > int main() > > { > > CONTEXT sr; > > sr.mask[5] = 0x8FED; > > > > __asm ( "movw %0, %ax" : : "m" (*(unsigned > short*)sr.mask[5]) ); > > return 0; > > } > > > > Compiler complains with error "bad substitution directive in asm > instruction". > > > > I tried changing the code something like this : > > > > __asm ( "movw %0, %ax" : : "m" (*(unsigned short*)sr.mask+5) ); > > > > Still error is same, then I tried following: > > > > Unsigned short* ptemp = &sr.mask[5]; > > __asm ( "movw %0, %ax" : : "m" (*(unsigned short*)ptemp) ); > > But still no luck, compiler reported same error as mentioned above > > > > Any help is appreciated. Please let me know where I am mistake. > > > > Thanks, > > -- Kiran P. > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" > >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?BMEDLGAENEKCJFGODFOCGECICAAA.tedm>