Remove names from some prototypes

Add declarations to eliminate -Wmissing-prototypes warnings

Catch up with HEAD (r280229-r284686).

MFH: r282615-r283655

Sponsored by: The FreeBSD Foundation

Merge sync of head

Remove the write-only variable phent. We currently do not check the
size of the program header's entries.

Reported by: adrian (by using gcc 4.9)
Sponsored by: The FreeBSD Foundation
MFC after: 1 we

Remove the write-only variable phent. We currently do not check the
size of the program header's entries.

Reported by: adrian (by using gcc 4.9)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week

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MFhead @ r277403

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

Add rtld private interface for dso to detect dynamic loading
vs. static linking.

Tested by: pho, antoine (exp-run)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week

MFC

IFC @ r234692

sys/amd64/include/cpufunc.h
sys/amd64/include/fpu.h
sys/amd64/amd64/fpu.c
sys/amd64/vmm/vmm.c

- Add API to allow vmm FPU state init/save/restore.

FP stuff discussed with: kib

Fetch the aux vector for the static libc, and use the entries to
initialize the cache of the system information as it was done for the
dynamic libc. This removes several sysctls from the static binar

Fetch the aux vector for the static libc, and use the entries to
initialize the cache of the system information as it was done for the
dynamic libc. This removes several sysctls from the static binary
startup.

Use the aux vector to fill the single struct dl_phdr_info describing
the static binary itself, to implement dl_iterate_phdr(3) for the
static binaries. [1]

Based on the submission by: John Marino <draco marino st> [1]
Tested by: flo (sparc64)
MFC after: 2 weeks

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IFC @230489 (pending review).

Implement fdlopen(3), an rtld interface to load shared object by file
descriptor.

Requested and tested by: des (previous version)
Reviewed by: des, kan (previous version)
MFC after: 2 weeks

Implement __pthread_map_stacks_exec() callback for libc, to change the
stack protection to allow execution for single-threaded processes.

Introduce implementation-private rtld interface _rtld_addr_phdr, which
fills struct dl_phdr_info for the shared object that contains the
specified address, if any.

Idea and reviewed by: kan
MFC afte

Introduce implementation-private rtld interface _rtld_addr_phdr, which
fills struct dl_phdr_info for the shared object that contains the
specified address, if any.

Idea and reviewed by: kan
MFC after: 3 weeks

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Update to current version of head.

MFC r205606
Remove const'ness from dlerror(3) prototype, for consistency with POSIX.

Approved by: cognet

- Remove const'ness from dlerror(3) prototype, for consistency with POSIX.

Approved by: cognet
MFC after: 1 week

Merge from head

- Merge from HEAD

Allow the NULL, RTLD_SELF and RTLD_NEXT handles to work with dlfunc(3).
dlfunc() called dlsym() to do the work, and dlsym() determines the dso
that originating the call by the return address. Due to

Allow the NULL, RTLD_SELF and RTLD_NEXT handles to work with dlfunc(3).
dlfunc() called dlsym() to do the work, and dlsym() determines the dso
that originating the call by the return address. Due to this, dlfunc()
operated as if the caller is always the libc.

To fix this, move the dlfunc() to rtld, where it can call the internal
implementation of dlsym, and still correctly fetch return address.
Provide usual weak stub for the symbol from libc for static binaries.
dlfunc is put to FBSD_1.0 symver namespace in the ld.so export to
override dlfunc@FBSD_1.0 weak symbol, exported by libc.

Reported, analyzed and tested by: Tijl Coosemans <tijl ulyssis org>
PR: standards/133339
Reviewed by: kan

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integrate from head@185615

Add two rtld exported symbols, _rtld_atfork_pre and _rtld_atfork_post.
Threading library calls _pre before the fork, allowing the rtld to
lock itself to ensure that other threads of the process are o

Add two rtld exported symbols, _rtld_atfork_pre and _rtld_atfork_post.
Threading library calls _pre before the fork, allowing the rtld to
lock itself to ensure that other threads of the process are out of
dynamic linker. _post releases the locks.

This allows the rtld to have consistent state in the child. Although
child may legitimately call only async-safe functions, the call may
need plt relocation resolution, and this requires working rtld.

Reported and debugging help by: rink
Reviewed by: kan, davidxu
MFC after: 1 month (anyway, not before 7.1 is out)

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