Re: [Qemu-devel] uvesafb doesn't work with seabios

[Kevin O'Connor <kevin@koconnor.net>]

On Mon, May 12, 2014 at 08:53:53PM +0200, Bernhard Walle wrote:
> Am 2014-05-12 07:29, schrieb Kevin O'Connor:
> >
> >It does look like the x86emu issue.  You can try applying the
> >SeaVGABIOS patch below to confirm it.
> 
> The output doesn't appear. But I'm sure that I copied the correct files
> because modifications of other strings worked.

Heh - old versions of x86emu apparently don't support "rep outsb"
either.  Can you test the patch below instead?

-Kevin


--- a/vgasrc/vgaentry.S
+++ b/vgasrc/vgaentry.S
@@ -47,7 +47,17 @@ _rom_header_signature:
 
         // Force a fault if found to be running on broken x86emu versions.
         DECLFUNC x86emu_fault
+msg:    .ascii "SeaVGABIOS: x86emu leal trap!\n"
 x86emu_fault:
+#if CONFIG_DEBUG_IO
+        movw %cs:DebugOutputPort, %dx
+        movw $msg, %si
+1:      movb %cs:(%si), %al
+        outb %al, (%dx)
+        incw %si
+        cmpw $x86emu_fault, %si
+        jl 1b
+#endif
 1:      hlt
         jmp 1b