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Fix multiboot compilation
Commit dd4239d6574ca41c94fc0d0f77ddc728510ffc57 broke multiboot. It replaced theinstruction "rep insb (%dx), %es:(%edi)" by the binary output of"addr32 rep insb (%dx), %es:(%di)".
Linuxboot calls the respective helper function in a code16 section. So the...
linuxboot: fix gdt address calculation
The gdt address calculation in linuxboot.bin is broken in two ways: firstit loads %cs into %eax, but that instruction leaves the high bits of %eaxundefined and we did not clear them. Secondly, we completely ignore the...
Fix thinko in linuxboot.S
The %gs segment that was used was not matching the comments.I just moved the GDT descriptor on the stack instead.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Make -kernel for linux work with bochsbios
While trying to run -kernel with -bios pc-bios/pcbios.bin, I realizedthat I was actually writing data to %es, but only set up %ds to a 32-bitsegment we want to write to.
So at the end of the day the data hasn't actually been copied. Oops....
Convert linux bootrom to external rom and fw_cfg
We already have a working multiboot implementation that uses fw_cfg to getits kernel module etc. data in int19 runtime now.
So what's missing is a working linux boot option rom. While at it I figured itwould be a good idea to take the opcode generator out of pc.c and instead use...