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Allow to specify a character special device as a core file.

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This enable us to use /dev/fwmem* as a core file.
e.g.
	ps -M /dev/fwmem0.0 -N kernel.debug
	dmesg -M /dev/fwmem0.0 -N kernel.debug
	gdb -k -c /dev/fwmem0.0 kernel.debug
You need to set target EUI64 in hw.firewire.fwmem.eui64_hi/lo before
opening the device. On the target arch, (PCI) bus address must be
equivalent to physical address.
(We cannot use this for sparc64 because of IOMMU.)

No objection in: -audit
This commit is contained in:
simokawa 2003-10-29 14:02:16 +00:00
parent c277c40b63
commit eb07797588
1 changed files with 18 additions and 21 deletions
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39
lib/libkvm/kvm.c
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@ -192,11 +192,8 @@ _kvm_open(kd, uf, mf, flag, errout)
*/
if (strcmp(mf, _PATH_DEVNULL) == 0) {
kd->vmfd = open(_PATH_DEVNULL, O_RDONLY);
} else if (strcmp(mf, _PATH_MEM) != 0) {
_kvm_err(kd, kd->program,
"%s: not physical memory device", mf);
goto failed;
} else {
return (kd);
} else if (strcmp(mf, _PATH_MEM) == 0) {
if ((kd->vmfd = open(_PATH_KMEM, flag)) < 0) {
_kvm_syserr(kd, kd->program, "%s", _PATH_KMEM);
goto failed;
@ -205,24 +202,24 @@ _kvm_open(kd, uf, mf, flag, errout)
_kvm_syserr(kd, kd->program, "%s", _PATH_KMEM);
goto failed;
}
return (kd);
}
} else {
/*
* This is a crash dump.
* Initialize the virtual address translation machinery,
* but first setup the namelist fd.
*/
if ((kd->nlfd = open(uf, O_RDONLY, 0)) < 0) {
_kvm_syserr(kd, kd->program, "%s", uf);
goto failed;
}
if (fcntl(kd->nlfd, F_SETFD, FD_CLOEXEC) < 0) {
_kvm_syserr(kd, kd->program, "%s", uf);
goto failed;
}
if (_kvm_initvtop(kd) < 0)
goto failed;
}
/*
* This is a crash dump.
* Initialize the virtual address translation machinery,
* but first setup the namelist fd.
*/
if ((kd->nlfd = open(uf, O_RDONLY, 0)) < 0) {
_kvm_syserr(kd, kd->program, "%s", uf);
goto failed;
}
if (fcntl(kd->nlfd, F_SETFD, FD_CLOEXEC) < 0) {
_kvm_syserr(kd, kd->program, "%s", uf);
goto failed;
}
if (_kvm_initvtop(kd) < 0)
goto failed;
return (kd);
failed:
/*