motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 15:53:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

dump: rebase from host-private RAMBlock offsets to guest-physical addresses

Browse source 
RAMBlock.offset                   --> GuestPhysBlock.target_start
RAMBlock.offset + RAMBlock.length --> GuestPhysBlock.target_end
RAMBlock.length                   --> GuestPhysBlock.target_end -
                                      GuestPhysBlock.target_start

"GuestPhysBlock.host_addr" is only used when writing the dump contents.

This patch enables "crash" to work with the vmcore by rebasing the vmcore
from the left side of the following diagram to the right side:

host-private
offset
relative
to ram_addr   RAMBlock                  guest-visible paddrs
            0 +-------------------+.....+-------------------+ 0
              |         ^         |     |        ^          |
              |       640 KB      |     |      640 KB       |
              |         v         |     |        v          |
  0x0000a0000 +-------------------+.....+-------------------+ 0x0000a0000
              |         ^         |     |XXXXXXXXXXXXXXXXXXX|
              |       384 KB      |     |XXXXXXXXXXXXXXXXXXX|
              |         v         |     |XXXXXXXXXXXXXXXXXXX|
  0x000100000 +-------------------+.....+-------------------+ 0x000100000
              |         ^         |     |        ^          |
              |       3583 MB     |     |      3583 MB      |
              |         v         |     |        v          |
  0x0e0000000 +-------------------+.....+-------------------+ 0x0e0000000
              |         ^         |.    |XXXXXXXXXXXXXXXXXXX|
              | above_4g_mem_size | .   |XXXX PCI hole XXXXX|
              |         v         |  .  |XXXX          XXXXX|
     ram_size +-------------------+   . |XXXX  512 MB  XXXXX|
                                   .   .|XXXXXXXXXXXXXXXXXXX|
                                    .   +-------------------+ 0x100000000
                                     .  |         ^         |
                                      . | above_4g_mem_size |
                                       .|         v         |
                                        +-------------------+ ram_size
                                                              + 512 MB

Related RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=981582

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Laszlo Ersek 2013-08-06 12:37:11 +02:00 • committed by Luiz Capitulino
parent c5d7f60f06
commit 56c4bfb3f0
7 changed files with 69 additions and 57 deletions
Download patch file Download diff file Expand all files Collapse all files

10
target-i386/arch_dump.c
View file

@ -15,6 +15,7 @@
#include "exec/cpu-all.h"
#include "sysemu/dump.h"
#include "elf.h"
#include "sysemu/memory_mapping.h"
#ifdef TARGET_X86_64
typedef struct {
@ -389,10 +390,11 @@ int x86_cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cs,
return cpu_write_qemu_note(f, &cpu->env, opaque, 0);
}
int cpu_get_dump_info(ArchDumpInfo *info)
int cpu_get_dump_info(ArchDumpInfo *info,
const GuestPhysBlockList *guest_phys_blocks)
{
bool lma = false;
RAMBlock *block;
GuestPhysBlock *block;
#ifdef TARGET_X86_64
X86CPU *first_x86_cpu = X86_CPU(first_cpu);
@ -412,8 +414,8 @@ int cpu_get_dump_info(ArchDumpInfo *info)
} else {
info->d_class = ELFCLASS32;
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
if (block->offset + block->length > UINT_MAX) {
QTAILQ_FOREACH(block, &guest_phys_blocks->head, next) {
if (block->target_end > UINT_MAX) {
/* The memory size is greater than 4G */
info->d_class = ELFCLASS64;
break;