src/lib/libkvm, branch releng/9.3

Direct commit to stable branch to fix ABI breakage:

2013-07-10T19:42:07Z

In r227839, when removing libkvm dependency on procfs(5), kvm_uread() function, used for reading from /proc/pid/mem, was removed too. This change broke ABI. Bring kvm_uread() back so that the ABI is kept. In head soname is going to be bumped instead. Reported by: rmh Discussed on: arch Suggested by: jilles

MFC r250231: libkvm: Make second /dev/null file descriptor close-on-exec as

2013-05-11T12:43:26Z

well.

MFC r250230: libkvm: Use O_CLOEXEC instead of separate fcntl(F_SETFD) call.

2013-05-11T11:56:50Z

MFC r241303: kvm_getprocs: gracefully handle errors from kvm_deadprocs

2012-10-17T11:26:27Z

MFC r241302: kvm_proclist: ignore processes in larvae state

2012-10-14T07:54:54Z

MFC r235286:

2012-05-18T00:31:20Z

General mdoc(7) and typo fixes. PR: 167734

MFC r230873:

2012-02-12T07:52:14Z

Try to avoid ambiguity when sysctl returns ENOMEM additionally 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

MFC r227839, r230146:

2012-01-30T19:32:33Z

r227839: Now kvm_getenvv() and kvm_getargv() don't need procfs(5). r230146: In kvm_argv(), the case when the supplied buffer was too short to hold the 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.

Add support for PBVM addresses. In a nutshell this means:

2011-08-06T15:59:54Z

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)

Rename ki_ocomm to ki_tdname and OCOMMLEN to TDNAMLEN.

2011-07-18T20:06:15Z

Provide backward compatibility defines under BURN_BRIDGES. Suggested by: jhb Reviewed by: emaste Sponsored by: Sandvine Incorporated Approved by: re (kib)