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coredump: Exclude special areas

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Fujitsu: POSTK_DEBUG_TEMP_FIX_38
Refs: #1005
Change-Id: I8934d2aecf06a09469afe131347e42b48b6f67f6
This commit is contained in:
Ken Sato
2018-08-09 16:02:46 +09:00
committed by Masamichi Takagi
parent 2910818f06
commit a269d96978
8 changed files with 327 additions and 9 deletions
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20
arch/x86_64/kernel/gencore.c
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@ -18,6 +18,12 @@
#define DDEBUG_DEFAULT DDEBUG_PRINT
#endif
/* Exclude reserved (mckernel's internal use), device file,
* hole created by mprotect
*/
#define GENCORE_RANGE_IS_INACCESSIBLE(range) \
((range->flag & (VR_RESERVED | VR_MEMTYPE_UC | VR_DONTDUMP)))
/*
* Generate a core file image, which consists of many chunks.
* Returns an allocated table, an etnry of which is a pair of the address
@ -307,12 +313,10 @@ int gencore(struct thread *thread, void *regs,
dkprintf("start:%lx end:%lx flag:%lx objoff:%lx\n",
range->start, range->end, range->flag, range->objoff);
/* We omit reserved areas because they are only for
mckernel's internal use. */
if (range->flag & VR_RESERVED)
continue;
if (range->flag & VR_DONTDUMP)
if (GENCORE_RANGE_IS_INACCESSIBLE(range)) {
continue;
}
/* We need a chunk for each page for a demand paging area.
This can be optimized for spacial complexity but we would
lose simplicity instead. */
@ -401,8 +405,9 @@ int gencore(struct thread *thread, void *regs,
unsigned long flag = range->flag;
unsigned long size = range->end - range->start;
if (range->flag & VR_RESERVED)
if (GENCORE_RANGE_IS_INACCESSIBLE(range)) {
continue;
}
ph[i].p_type = PT_LOAD;
ph[i].p_flags = ((flag & VR_PROT_READ) ? PF_R : 0)
@ -444,8 +449,9 @@ int gencore(struct thread *thread, void *regs,
unsigned long phys;
if (range->flag & VR_RESERVED)
if (GENCORE_RANGE_IS_INACCESSIBLE(range)) {
continue;
}
if (range->flag & VR_DEMAND_PAGING) {
/* Just an ad hoc kluge. */
unsigned long p, start, phys;