file as follows:
1. Common ia64-specific support functions have the ia64_ prefix.
2. Functions that work on physical cores have the phys_ prefix.
3. Functions that work on virtual cores have the virt_ prefix.
With that:
1. _kvm_kvatop() has been renamed to phys_kvatop() as it handles
physical cores only.
2. The new _kvm_kvatop() is nothing but a wrapper that calls either
phys_kvatop() or virt_kvatop() by virtue of the kvatop function
pointer in the vmstate structure.
3. virt_kvatop() is nothing but a wrapper around virt_addr2off().
4. virt_addr2off() iterates over the Phdrs to find the segment in
which the address falls and return the file offset for it.
Now it's up to the kernel to populate the core file appropriately.
produced will be called libkvm-${ARCH} instead of libkvm. This allows
installing it alongside the native version.
For symbol lookups, use ps_pglobal_lookup() instead of __fdnlist()
when building a cross libkvm. It is assumed that the cross tool that
uses the cross libkvm also provides an implementation for this
proc_services function.
Note that this commit does not change any of the architecture-specific
code for cross-compilation.
tools would need to know about the counter_u64_t type. Allow to include
sys/counter.h from userspace.
- Utilize now defined type in kvm_counter_u64_fetch().
Sponsored by: Netflix
Sponsored by: Nginx, Inc.
kvm_uread() function, used for reading from /proc/pid/mem, was
removed too. But the function declaration remained in kvm.h
public header and the soname was not bumped.
Remove kvm_uread() from kvm.h and bump the soname.
Reported by: rmh
Discussed on: arch
checking the returned oldlen: when ENOMEM is due to the supplied
buffer being too short the return oldlen is equal to buffer size.
Without this additional check kvm_getprocs() gets stuck in loop if the
returned ENOMEM was due the exceeded memorylocked limit. This is
easily can be observed running `limits -l 1k top'.
Submitted by: Andrey Zonov <andrey zonov org>
MFC after: 1 week
requested value was handled incorrectly, and the function retuned NULL
instead of the truncated result.
Fix this and also remove unnecessary check for buf != NULL, which alway
retuns true.
MFC after: 3 days
o get the physical address and size of the PBVM page table. This
can be found in the bootinfo structure, of which the physical
address is recorded as the ELF entry point.
o translate region 4 virtual addresses to physical addresses using
the PBVM page table.
In _kvm_kvatop() make the distinction between physical address and
core file offset a little clearer to avoid confusion. To further
enhance readability, always store the translated address into pa
so that it's obvious how the translation from va to pa happened.
Approved by: re (blanket)
as long as this does not happen, we need to fix interfaces to userland
in order to not break run-time accesses to the structure.
Reviwed by: kib
Tested by: pluknet
Some files keep the SUN4V tags as a code reference, for the future,
if any rewamped sun4v support wants to be added again.
Reviewed by: marius
Tested by: sbruno
Approved by: re
Fix a long standing bug, where the procs ticks where assumed to be in
us. Instead, read cpu_tick_frequency from the kernel and use the same
logic to convert runtime. This is still too optimistic in that it
assumes cpu_tick_frequency is available and fixed. Since this function
is only called on crashdumps, I think we can live with that. Testing has
shown the values to be correct for different kern.hz inside Virtualbox.
Bump WARNS. Alignment issues on some archs mean this is still at 3.
Reviewed by: bde
- make WARNS=6 clean for archs w/o strict alignment requirments
- add const, ANSIfy, remove unused vars, cast types for comparison
- thanks to differing definitions of VM_MIN_ADDRESS across our archs, we
need to trick the compiler to not complain about signedness. We could
either fix VM_MIN_ADDRESS to always be a simple integer or make the
check conditional on $ARCH.
Closes PRs: kern/42386, kern/83364
Reviewed by: bde
After KVA space was increased to 512GB on amd64 it became impractical
to use PTEs as entries in the minidump map of dumped pages, because size
of that map alone would already be 1GB.
Instead, we now use PDEs as page map entries and employ two stage lookup
in libkvm: virtual address -> PDE -> PTE -> physical address. PTEs are
now dumped as regular pages. Fixed page map size now is 2MB.
libkvm keeps support for accessing amd64 minidumps of version 1.
Support for 1GB pages is added.
Many thanks to Alan Cox for his guidance, numerous reviews, suggestions,
enhancments and corrections.
Reviewed by: alc [kernel part]
MFC after: 15 days
Additionally, because of sysctl(3) use (which is generally good), behaviour
for crash dumps differs slightly from behaviour for live kernels and this
will probably never be fixed entirely, so weaken that claim.
MFC after: 1 week
(DPCPU):
A new API, kvm_dpcpu_setcpu(3), selects the active CPU for the purposes
of DPCPU. Calls to kvm_nlist(3) will automatically translate DPCPU
symbols and return a pointer to the current CPU's version of the data.
Consumers needing to read the same symbol on several CPUs will invoke a
series of setcpu/nlist calls, one per CPU of interest.
This addition makes it possible for tools like netstat(1) to query the
values of DPCPU variables during crashdump analysis, and is based on
similar code handling virtualized global variables.
MFC after: 1 week
Sponsored by: Juniper Networks, Inc.
Similar to libexec/, do the same with lib/. Make WARNS=6 the norm and
lower it when needed.
I'm setting WARNS?=0 for secure/. It seems secure/ includes the
Makefile.inc provided by lib/. I'm not going to touch that directory.
Most of the code there is contributed anyway.
