On Wed, Apr 15, 2015 at 07:31:21PM +0200, Roger Pau Monné wrote: > Hello, > > I've compiled SeaBIOS on FreeBSD with gcc48, and although the build > process succeeds, the resulting binary doesn't fully work. Most > functions seem to work fine but there are some int15h functions that > don't work properly (ie: they return invalid values). > > I've compiled SeaBIOS with CONFIG_DEBUG_LEVEL=10 and got the following > output (this is from the Xen console):
I'd be careful with debug level 10 - I've seen the high debugging cause issues. I usually don't go above 8. Alternatively, you can decrease the individual debug levels in src/config.h . > [...] > (d4) enter handle_1a: > (d4) a=00000200 b=00000000 c=00001725 d=00003400 ds=4cf0 es=9eb8 ss=dd00 > (d4) si=00000004 di=00000000 bp=00000000 sp=0000fe66 cs=0000 ip=9336 f=0242 > (d4) enter handle_1a: > (d4) a=00000200 b=00000000 c=00001725 d=00003400 ds=4cf0 es=9eb8 ss=dd00 > (d4) si=00000004 di=00000000 bp=00000000 sp=0000fe66 cs=0000 ip=9336 f=0242 > (d4) enter handle_1a: > (d4) a=00000200 b=00000000 c=00001725 d=00003400 ds=4cf0 es=9eb8 (XEN) > irq.c:386: Dom4 callback via changed to Direct Vector 0x93 > (XEN) irq.c:276: Dom4 PCI link 0 changed 5 -> 0 > (XEN) irq.c:276: Dom4 PCI link 1 changed 10 -> 0 > (XEN) irq.c:276: Dom4 PCI link 2 changed 11 -> 0 > (XEN) irq.c:276: Dom4 PCI link 3 changed 5 -> 0 > (d4) enter handle_15: > > And that's all, there's no line containing the register values. I'm > quite lost at figuring what's going on, so any help about how to > proceed in order to debug this is highly appreciated. In situations like the above, I run qemu with "-d in_asm,int,exec,cpu" and redirect the output to some log file. I then look through the log to see where things went wrong. If you know which "int 15h" is returning bogus values, you can also use gdb with qemu and set a break point. See http://seabios.org/Debugging . Let me know what you find or if you need help. -Kevin _______________________________________________ SeaBIOS mailing list [email protected] http://www.seabios.org/mailman/listinfo/seabios
