On Wed, 24 May 2000, Marcus Meissner wrote:
> Added comments and commented out the code after some discussion and analysis
> on gcc-bugs.
I rewrote that asm section a few weeks ago, but didn't submit it because I
wanted to do other dpmi cleanups too first while I was at it.
Some of these explicit registers constraints ("d", "a", and "c") could
probably be replaced with "r", though, in case the compiler has a better
arrangement itself. How does this look to you?
__asm__ __volatile__(
"pushl %%ebp\n"
"pushl %%es\n"
"pushl %%ds\n"
"pushfl\n"
"mov %7,%%es\n"
"mov %5,%%ds\n"
"lcall *(%3)\n"
"popl %%ds\n"
"mov %%es,%0\n"
"popl %%es\n"
"popl %%ebp\n"
: "=d" (es), "=D" (edi), "=S" (_clobber), "=a" (_clobber), "=c" (_clobber)
: "0" (ss), "2" (ESP_reg(context)),
"4" (rmcb->regs_sel), "1" (rmcb->regs_ofs),
"3" (&rmcb->proc_ofs)
: "ebx" );
