Package: grub
Version: 0.97-28
Severity: important
Tags: patch
https://bugs.launchpad.net/bugs/106887
This problem was reported by "Linoleum" and "mpwalter" in Ubuntu bug #106887,
but we tested the Debian packages
as well, and they also need the patch. This was confirmed by "cs224" who runs
Debian lenny. The patch was
introduced in Mandriva and is also used by Red Hat.
>From the Ubuntu changelog (grub 0.97-20ubuntu7):
Add patch from Mandriva grub-0.95-mem_lower.patch (Ubuntu bug #106887)
Allows grub to boot on some computer where only lilo and syslinux
would work. Uses memory detection similar to syslinux.
http://www.mail-archive.com/[EMAIL PROTECTED]/msg06526.html
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.21-1-486
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages grub depends on:
ii libc6 2.5-10 GNU C Library: Shared libraries
ii libncurses5 5.6-3 Shared libraries for terminal hand
grub recommends no packages.
-- no debconf information
diff -Naur grub-0.95.orig/stage2/common.c grub-0.95/stage2/common.c
--- grub-0.95.orig/stage2/common.c 2004-03-27 13:25:44.000000000 -0300
+++ grub-0.95/stage2/common.c 2004-12-08 17:36:36.590781312 -0200
@@ -108,26 +108,43 @@
unsigned long long top;
unsigned long addr;
int cont;
-
+
top = bottom;
- do
- {
- for (cont = 0, addr = mbi.mmap_addr;
- addr < mbi.mmap_addr + mbi.mmap_length;
- addr += *((unsigned long *) addr) + 4)
+ /* If detecting mbi.mem_lower */
+ if (bottom == 0) {
+ /* Initialize to 640Kb */
+ top = 0xA0000ULL;
+ for (addr = mbi.mmap_addr;
+ addr < mbi.mmap_addr + mbi.mmap_length;
+ addr += *((unsigned long *) addr) + 4) {
+ struct AddrRangeDesc *desc = (struct AddrRangeDesc *) addr;
+
+ /* If there is anything reserved below 640Kb */
+ if (desc->BaseAddr < top && desc->Length &&
+ desc->Type != MB_ARD_MEMORY)
+ top = desc->BaseAddr;
+ }
+ }
+ else {
+ do
{
- struct AddrRangeDesc *desc = (struct AddrRangeDesc *) addr;
-
- if (desc->Type == MB_ARD_MEMORY
- && desc->BaseAddr <= top
- && desc->BaseAddr + desc->Length > top)
+ for (cont = 0, addr = mbi.mmap_addr;
+ addr < mbi.mmap_addr + mbi.mmap_length;
+ addr += *((unsigned long *) addr) + 4)
{
- top = desc->BaseAddr + desc->Length;
- cont++;
+ struct AddrRangeDesc *desc = (struct AddrRangeDesc *) addr;
+
+ if (desc->Type == MB_ARD_MEMORY
+ && desc->BaseAddr <= top
+ && desc->BaseAddr + desc->Length > top)
+ {
+ top = desc->BaseAddr + desc->Length;
+ cont++;
+ }
}
}
+ while (cont);
}
- while (cont);
/* For now, GRUB assumes 32bits addresses, so... */
if (top > 0xFFFFFFFF)
@@ -194,6 +211,7 @@
if (mbi.mmap_length)
{
unsigned long long max_addr;
+ unsigned long mem_lower = mmap_avail_at (0) >> 10;
/*
* This is to get the lower memory, and upper memory (up to the
@@ -201,7 +219,8 @@
* elements. This is for OS's that don't care about the memory
* map, but might care about total RAM available.
*/
- mbi.mem_lower = mmap_avail_at (0) >> 10;
+ if (mem_lower < mbi.mem_lower)
+ mbi.mem_lower = mem_lower;
mbi.mem_upper = mmap_avail_at (0x100000) >> 10;
/* Find the maximum available address. Ignore any memory holes. */
