Syslinux - Mar 2007 - SYSLINUX 3.40-pre15 -- more library work, Linux-loading demo module

Hello all,

I have done more work on the syslinux shuffle library.  This is more 
higher-level work, in particular it is specific to loading Linux kernels.

This stuff allows manipulating initramfs on the fly, if desired.  As a 
demo, I have written up a module which loads a Linux kernel with all the 
usual stuff, but optionally adds the DHCP packet from the PXE stack into 
a file named /dhcpinfo.dat in the initramfs.

I really hope it is abstracted enough that it should be readily 
accessible to everyone; the main file is only 235 lines including comments.

	-hpa

"H. Peter Anvin" <hpa at zytor.com> writes:
> This stuff allows manipulating initramfs on the fly, if desired.  As a 
> demo, I have written up a module which loads a Linux kernel with all the 
> usual stuff, but optionally adds the DHCP packet from the PXE stack into 
> a file named /dhcpinfo.dat in the initramfs.
Hi,

I'm trying it out in version 3.50-pre2.  First of all, the following
patch seems necessary:

--- linux.c     2007-04-03 16:46:00.566289677 +0200
+++ linux_new.c 2007-04-03 16:45:47.804863682 +0200
@@ -156,6 +156,7 @@
       fprintf(stderr, "%s: unknown option: %s\n", progname, arg);
       return 1;
     }
+    argp++;
   }
 
   if (!arg) {

Even with this, my dhcpinfo.dat file is nothing but 12 zero bytes.
I'm trying to investigate this further, but could use some guidance.
-- 
Thanks,
Feri.

Hi,

as a side note, make in the com32/modules directory doesn't make
linux.c32 at least.  And you probably know about the pcitest build
failure:

gcc -m32  -mregparm=3 -DREGPARM=3 -W -Wall -march=i386 -Os -fomit-frame-pointer
-I../libutil/include -I../include  -D__COM32__ -c -o pcitest.o pcitest.c
pcitest.c: In function `display_pci_bus':
pcitest.c:54: error: structure has no member named `vendor_name'
pcitest.c:54: error: structure has no member named `product_name'
pcitest.c: In function `main':
pcitest.c:61: warning: unused parameter `argc'
pcitest.c:61: warning: unused parameter `argv'
make: *** [pcitest.o] Error 1
-- 
Thanks,
Feri.