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Lift up core size limits on some platforms. Fix potential memory

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corruption with big core on small memory systems. Document remaining
	limits.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-03-07 08:17:24 +01:00
parent f6b58fe538
commit 774683685f
9 changed files with 210 additions and 32 deletions
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12
grub-core/kern/i386/pc/init.c
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@ -191,6 +191,7 @@ grub_machine_init (void)
#if 0
int grub_lower_mem;
#endif
grub_addr_t modend;
grub_modbase = GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR + (_edata - _start);
@ -222,8 +223,17 @@ grub_machine_init (void)
compact_mem_regions ();
modend = grub_modules_get_end ();
for (i = 0; i < num_regions; i++)
grub_mm_init_region ((void *) mem_regions[i].addr, mem_regions[i].size);
{
grub_addr_t beg = mem_regions[i].addr;
grub_addr_t fin = mem_regions[i].addr + mem_regions[i].size;
if (modend && beg < modend)
beg = modend;
if (beg >= fin)
continue;
grub_mm_init_region ((void *) beg, fin - beg);
}
grub_tsc_init ();
}