runtime_loader: dlopen() should respect RPATH of the loading module

Change-Id: Ic58edb53114dfff30cc7188957cd32508fa8bd48
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3798
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

libroot: make API version available.

Change-Id: I370d5c8e9b4f076e7f115ca6c87bc7f943d36c17
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1850
Reviewed-by: Rene Gollent <rene@gollent.com>

runtime_loader: Export the correct reinit_after_fork.

Forgot to add this change in my last commit. Whoops.

runtime_loader: Reinit the heap lock after fork.

runtime_loader: add support for ELF based TLS

This patch introduces support of ELF based TLS handling with lazy allocation
and initalization of TLS block for each DSO and thread. The implementation
generally follows the official ABI except that generation counter in dtv
is in fact a pointer to Generation object that contains both generation
counter and size of the dtv. That simplified the implementation a bit, but
could be changed later. The ABI requirements regariding in memory position
of TLS block is not honoured what results in static TLS model being
unsupported. However, that should not be a problem as long as
"executables" in Haiku are in fact shared objects and optimizations which
require specific TLS block in memory layout are not possible anyway.

runtime loader: Export get_executable_architecture() function

Given a path of an ELF file, it tries to determine its architecture.

libroot: explicitly check ABI version

As Axel suggested use simple, explicit checks for legacy ABI version
instead of obscure "compatibility mode".

libroot: make all areas executable for old binaries

* If at least one image is either B_HAIKU_ABI_GCC_2_ANCIENT or
B_HAIKU_ABI_GCC_2_BEOS almost all areas are marked as executable.
* B_EXECUTE_AREA and B_STACK_AREA are made public. The former is enforced since
the introduction of DEP and apps need it to correctly set area protection.
The latter is currently needed only to recognize stack areas and fix their
protection in compatibility mode, but may also be useful if an app wants
to use sigaltstack from POSIX API.

commpage: randomize position of commpage

This patch introduces randomization of commpage position. From now on commpage
table contains offsets from begining to of the commpage to the particular
commpage entry. Similary addresses of symbols in ELF memory image "commpage"
are just offsets from the begining of the commpage.

This patch also updates KDL so that commpage entries are recognized and shown
correctly in stack trace. An update of Debugger is yet to be done.

Fix dladdr behaviour

* If dladdr can't find an exact match, it returns the nearest symbol
less than the given address.
* If no suitable symbol can be found, but the address is within a
loaded library, dladdr returns the library name and base address.

Signed-off-by: Ingo Weinhold <ingo_weinhold@gmx.de>

* Implemented dladdr() in the runtime loader. This is like a gazillion times
faster than before.
* This also solves a TODO in dladdr(), although I did not use
get_library_symbol() as I didn't quite see how that could fit as the comment
suggested; there is now a new function get_symbol_at_address() for this.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42598 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Also define the build system variables TARGET_STATIC_{LIBSTDC++,LIBSUPC++}.
* runtime loader:
- Fixed gcc 4 warnings.
- Enabled -Werror.
- Renamed all remaining *.c source files to *.cpp.
- Implemented GNU style ELF symbol versioning support.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30806 a95241bf-73f2-0310-859d-f6bbb57e9c96

runtime_loader: add support for ELF based TLS

This patch introduces support of ELF based TLS handling with lazy allocation
and initalization of TLS block for each DSO and thread. The implementation
generally follows the official ABI except that generation counter in dtv
is in fact a pointer to Generation object that contains both generation
counter and size of the dtv. That simplified the implementation a bit, but
could be changed later. The ABI requirements regariding in memory position
of TLS block is not honoured what results in static TLS model being
unsupported. However, that should not be a problem as long as
"executables" in Haiku are in fact shared objects and optimizations which
require specific TLS block in memory layout are not possible anyway.

runtime loader: Export get_executable_architecture() function

Given a path of an ELF file, it tries to determine its architecture.

libroot: explicitly check ABI version

As Axel suggested use simple, explicit checks for legacy ABI version
instead of obscure "compatibility mode".

libroot: make all areas executable for old binaries

* If at least one image is either B_HAIKU_ABI_GCC_2_ANCIENT or
B_HAIKU_ABI_GCC_2_BEOS almost all areas are marked as executable.
* B_EXECUTE_AREA and B_STACK_AREA are made public. The former is enforced since
the introduction of DEP and apps need it to correctly set area protection.
The latter is currently needed only to recognize stack areas and fix their
protection in compatibility mode, but may also be useful if an app wants
to use sigaltstack from POSIX API.

commpage: randomize position of commpage

This patch introduces randomization of commpage position. From now on commpage
table contains offsets from begining to of the commpage to the particular
commpage entry. Similary addresses of symbols in ELF memory image "commpage"
are just offsets from the begining of the commpage.

This patch also updates KDL so that commpage entries are recognized and shown
correctly in stack trace. An update of Debugger is yet to be done.

Fix dladdr behaviour

* If dladdr can't find an exact match, it returns the nearest symbol
less than the given address.
* If no suitable symbol can be found, but the address is within a
loaded library, dladdr returns the library name and base address.

Signed-off-by: Ingo Weinhold <ingo_weinhold@gmx.de>

* Implemented dladdr() in the runtime loader. This is like a gazillion times
faster than before.
* This also solves a TODO in dladdr(), although I did not use
get_library_symbol() as I didn't quite see how that could fit as the comment
suggested; there is now a new function get_symbol_at_address() for this.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42598 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Also define the build system variables TARGET_STATIC_{LIBSTDC++,LIBSUPC++}.
* runtime loader:
- Fixed gcc 4 warnings.
- Enabled -Werror.
- Renamed all remaining *.c source files to *.cpp.
- Implemented GNU style ELF symbol versioning support.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30806 a95241bf-73f2-0310-859d-f6bbb57e9c96