Yang Zhiguo wrote:
hi,
i run crash with gdb.
[root@rhel51rc2 crash-4.0-6.1]# gdb ./crash
GNU gdb Red Hat Linux (6.5-25.el5rh)
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This GDB was configured as "ia64-redhat-linux-gnu"...Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) b search
Breakpoint 1 at 0x40000000000f8e11: file memory.c, line 11025.
(gdb) r -s
Starting program: /home/yangzg/crash-4.0-6.1/crash -s
crash> search -k 12345
Breakpoint 1, search (start=11529215046068469760, end=18446744073709551615, mask=0, memtype=1, value=0x60000fffffe3eab0, vcnt=1) at memory.c:11025
11025 if (start & (sizeof(long)-1)) {
(gdb) n
11030 pagebuf = GETBUF(PAGESIZE());
(gdb)
11031 next = start;
(gdb)
11033 for (pp = VIRTPAGEBASE(start); next < end; next = pp) {
(gdb)
11034 lastpage = (VIRTPAGEBASE(next) == VIRTPAGEBASE(end));
(gdb)
11035 if (LKCD_DUMPFILE())
(gdb)
11038 switch (memtype)
(gdb)
11050 if (!kvtop(CURRENT_CONTEXT(), pp, &paddr, 0) ||
(gdb) s
kvtop (tc=0x6000000001ec1c50, kvaddr=11529215046068469760, paddr=0x60000fffffe368e8, verbose=0) at memory.c:2306
2306 return (machdep->kvtop(tc ? tc : CURRENT_CONTEXT(), kvaddr,
(gdb) s
ia64_kvtop (tc=0x6000000001ec1c50, kvaddr=11529215046068469760, paddr=0x60000fffffe368e8, verbose=0) at ia64.c:1031
1031 if (!IS_KVADDR(kvaddr))
(gdb) n
1034 if (!vt->vmalloc_start) {
(gdb)
1039 switch (VADDR_REGION(kvaddr))
(gdb)
1054 if (ia64_IS_VMALLOC_ADDR(kvaddr))
(gdb)
1056 *paddr = ia64_VTOP(kvaddr);
(gdb) s
ia64_VTOP (vaddr=11529215046068469760) at ia64.c:3501
3501 ms = &ia64_machine_specific;
(gdb) n
3503 switch (VADDR_REGION(vaddr))
(gdb)
3522 if (ia64_IS_VMALLOC_ADDR(vaddr) ||
(gdb)
3531 paddr = vaddr - ms->kernel_start +
(gdb)
3533 break;
(gdb) p/x paddr
$1 = 0xffffffff04000000 ======>error occured
(gdb) p/x vaddr
$2 = 0xa000000000000000
(gdb) p/x ms->kernel_start
$3 = 0xa000000100000000
(gdb) p/x ms->phys_start
$4 = 0x4000000
(gdb)
Best Regards,
yang
I can reproduce it on a bare-metal RHEL5 kernel, so let me
figure out what's going on...
Thanks,
Dave
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