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nova: detect overlapping module regions

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Detect overlapping regions which should not overlap and print some meaningful
message instead of dying with some mysterious page fault.

Issue #1402
This commit is contained in:
Alexander Boettcher 2015-02-10 21:11:59 +01:00 committed by Christian Helmuth
parent 00167aec14
commit 2b69310adf
1 changed files with 24 additions and 0 deletions
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24
repos/base-nova/src/core/platform.cc
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@ -405,6 +405,30 @@ Platform::Platform() :
prev_cmd_line_page = curr_cmd_line_page;
}
/* sanity checks that regions don't overlap - could be bootloader issue */
mem_desc = (Hip::Mem_desc *)mem_desc_base;
for (unsigned i = 0; i < num_mem_desc; i++, mem_desc++) {
if (mem_desc->type == Hip::Mem_desc::AVAILABLE_MEMORY) continue;
Hip::Mem_desc * mem_d = (Hip::Mem_desc *)mem_desc_base;
for (unsigned j = 0; j < num_mem_desc; j++, mem_d++) {
if (mem_d->type == Hip::Mem_desc::AVAILABLE_MEMORY) continue;
if (mem_d == mem_desc) continue;
/* if regions are disjunct all is fine */
if ((mem_d->addr + mem_d->size <= mem_desc->addr) ||
(mem_d->addr >= mem_desc->addr + mem_desc->size))
continue;
PERR("region overlap [0x%8llx+0x%8llx] (%d) with "
"[0x%8llx+0x%8llx] (%d)",
mem_desc->addr, mem_desc->size, mem_desc->type,
mem_d->addr, mem_d->size, mem_d->type);
nova_die();
}
}
/*
* From now on, it is save to use the core allocators...
*/