Add a newline

Simplify ELFSIZE by using _MIPS_SZPTR

branches: 1.19.6; 1.19.12;
make sure to look in CFLAGS, COPTS and CPPFLAGS for abi options.

fixes sgimips64 build of n64 ld.elf_so.

use COPTS for -G0.
replace ${CPUFLAGS:M-mabi=64:M-mabi=o64} with two constructs.
the former doesn't seem to work anymore.

Merge from matt-nb5-mips64:
Add N32/N64 support for mips dynamic loader.

Fix start symbols for new binutils.

branches: 1.15.32;
Explicitly prefix ld(1) options in LDFLAGS with "-Wl," rather than
using the ${LDFLAGS:@F@-Wl,$F@} make substitution because that breaks
if LDFLAGS is already set.

Move common LDFLAGS into Makefile from arch/*/Makefile.inc

Whitespace.

-I${.CURDIR} is done at the top-level, so there's no need to do it here.

This ld script is now unnecessary.

Snapshot of work to make MIPS ld.elf_so relocatable.

branches: 1.9.2;
Grumble. Put compiler options back into CPPFLAGS for now, since
they're needed to build .S files with the correct PIC options.

XXX Really needs cleanup in <bsd.*.mk> to do this properly.

Don't put compiler options into CPPFLAGS.

This should use MACHINE_ARCH and test on "mipseb" instead of MACHINE and
"newsmips"

Remove the ld.so link for ld.elf_so - the compat13 package takes care
of this.

branches: 1.5.2;
Introduce pre-preocessor symbol RTLD_INHIBIT_COPY_RELOCS.
Currently, only mips does not include COPY_RELOCs code.

PR/6824: Erik Bertelsen: Missed arch directory in recent move.

${DESTDIR} isn't needed - which isn't what the example in
/usr/share/mk/bsd.README seems to indicate.

branches: 1.2.2;
Make this work with objdirs.

Add support for mips.

This ld script is now unnecessary.

Snapshot of work to make MIPS ld.elf_so relocatable.

branches: 1.2.6;
Don't try to get libc_pic from the libc compile directory. If we're doing a
build, libc has already been installed.

branches: 1.1.2;
Add support for mips.

Create a new header lwp_private.h to contain _lwp_getprivate_fast,
_lwp_gettcb_fast, _lwp_settcb and remove them from mcontext.h, so that:
1. we don't need special hacks to hide them
2. we can include <lwp.h> where needed to get the necessary prototypes
without redefining them locally.

ld.elf_so(1): Cite reference for MIPS ELF relocations.

This doesn't cover everything -- it's missing the thread-local
storage relocations -- but it's a start.

PR lib/58455: Missing references for processor-specific ELF
relocation semantics

ld.elf_so(1): Nix trailing whitespace.

No functional change intended.

branches: 1.75.2;
Fix interactions of initial-exec TLS model and dlopen

(1) If an initial-exec relocation was used for a non-local symbol
(i.e. the definition of the symbol is in a different DSO), the
computation of the static TLS offset used the wrong DSO.
This would effectively mean the wrong address was computed
(PR toolchain/50277, PR pkg/57445).

Fix this by forcing the computation of the correct DSO (the one defining
the symbol).

This code uses __UNCONST to avoid the vast interface changes for this
special case.

(2) If symbols from a DSO loaded via dlopen are used with both
global-dynamic/local-dynamic and initial-exec relocations AND
a initial-exec relocation was resolved first in a thread, a split brain
situation could exist where the dynamic relocations would use one memory
block (separate allocation) and the initial-exec relocations the static
per-thread TLS space.

(3) If the initial-exec relocation in (2) is seen after any thread has
already used a GD/LD allocation, bail out. Since IE relocations are used
only in the GOT, this will prevent the dlopen. This is a bit more
aggressive than necessary, but a full blown reference counting doesn't
seem to be justified.

branches: 1.74.6;
Don't or the got object in, just assign it. Fixes cc -mabi=64 hello.c -lcrypto
Now all 64 bit binaries work, and I tested that we did not break the 32 bit
ones
XXX: That 0x80000000 seems wrong for 64 bit stuff.

simplify pointer gymnastics that sprained gcc-8

branches: 1.72.4; 1.72.6;
don't forget to eat the high bits.

Fix typo in comment

from freebsd

fix debug build

Add IRELATIVE support for ARM, X86 and PowerPC.

Replace last use of r_type.

Fix C&P bug. Deal with more MIPS hacks overriding def.

Replace COMBREL with just-in-time check in _rtld_relocate_nonplt_objects.

The COMBREL logic predates thread-safety of the dynamic linker and
breaks the use of shared locks for the common symbol lookup case. It is
unlikely to provide any benefit for lazy binding or PLT lookups, so
provide equivalent functionality in the non-PLT relocation handling loop
by checking if the symbol used by the current relocation is the same as
the one used during the last lookup. No inter-object cachine is done as
it is also unlikely to be benefical.

Testing with Firefox startup on AMD64 shows a small performance gain by
the new method.

branches: 1.65.8;
where is already void *

make debug code compile again
from christos

Add basic support for indirect functions. It allows providing a public
function symbol with an implementation choosen at run time.
Refactor calls to functions by address in ld.elf_so to create temporary
function descriptors on the stack, if the address is not leaked outside.

Limitations:
- no support for initialising static storage with function pointers
- no support for unnamed resolver functions

Inspired by FreeBSD's r228435 by kib@freebsd.org.

branches: 1.62.22;
Add basic locking to ld.elf_so.

Add support for the MIPS TLS reloc types in shared libraries.

Make the GOT1_MASK 64-bit clean.

Reduce header pollution for mdreloc.c. Make Obj_Entry argument of
_rtld_relocate_nonplt_objects non-const in preparation for TLS support.

Shut gcc up.

PR/39240: Satoshi Suetake: Don't fail when attempting to resolve weak symbols
when we are doing immediate binding, leave them alone and they will be dealt
with later during lazy binding. From skrll@

Merge from matt-nb5-mips64:
Add N32/N64 support for mips dynamic loader.

Remove trailing \n in calls to _rtld_error: a newline is automatically
added by a call to the function.

fix signed/unsigned comparisons and const cast away (untested)

branches: 1.53.4; 1.53.10;
Refactor common code to _rtld_relocate_plt_object to i386 and arm so they
act like the other versions.
In _rtld_bind, if the result is 0, call _rtld_die.
Initialize _rtld_sym_zero.st_value to -_rtld_objself.maprelocbase. Now when
the symbol is resolved, st_value + maprelocbase will equal 0 and the above
check in _rtld_bind will fire and a call to NULL will be avoided.

branches: 1.52.20;
Fix unaligned loads and stores generated by gcc4. Problem described in
http://mail-index.NetBSD.org/tech-toolchain/2006/06/27/0001.html.
This cleaner version of the patch from Christos - thanks!

Remove empty lines.

Add LD_BIND_NOW support for mips.

This is the last arch to be done so remove the large ugly #if defined()
stuff in reloc.c.

Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

Add __RCSID.

Initialize a bunch of local variables in _rtld_relocate_nonplt_self().
Found by -Wuninitialized while compiling for newsmips.

Reviewed by lukem.

Apply fixes from Charles:

- Fix how _rtld_relocate_nonplt_self deals with REL32 relocations.

- Change the assert so that it is correct for binutils 2.14 and 2.15.

There are still problems with the libraries generated with binutils 2.15,
but at least ld.elf_so doesn't crash.

Restore handling of reloc entries that point to unaligned locations
that seems to have disappeared in rev 1.34.

Thanks to Jason Thorpe for suggesting where to look.
Fixes the simple test case in PR port-mips/23366.

Make the effect of the hack clearer.

One more tweak...

Make the comment a little more accurate.

Temporary workaround for some binutils/ld lossage. See the comment for more
information.

include <string.h> or <stdlib.h> for all prototypes

ANSIfy and de-__P().

Correct the in_plt parameter of a couple of _rtld_find_symdef calls.

The mips_reloc.c case is a no-op as _rtld_symlook_obj ignores in_plt for
MIPS.

OK'ed by Charles.

Minor cleanup.

Add an iffy heuristic that allows us to do lazy binding with new objects, but
detect old objects and deal with them.

Minor cleanup, for clarity.

Resolve the GOT before doing relocations. Then, when doing relocations, for
symbols in the global part of the symbol table, use the updated GOT entry
rather than doing a lookup. (This provides the same effect as `-z combreloc'
on other platforms -- at most one lookup is done per symbol.)

Unfortunately, it is necessary to turn off lazy binding on MIPS. As the
comment says:

* XXX DANGER WILL ROBINSON!
* You might think this is stupid, as it intentionally
* defeats lazy binding -- and you'd be right.
* Unfortunately, for lazy binding to work right, we
* need to a way to force the GOT slots used for
* function pointers to be resolved immediately. This
* is supposed to be done automatically by the linker,
* by not outputting a PLT slot and setting st_value
* to 0, but GNU ld does not do so reliably.

It is possible for reloc entries to point to unaligned locations; handle
this.

In _rtld_bind_mips(), if the symbol is undefined, die.

Add an explanatory comment.

The sense of the SHN_ABS test has always been reversed. Fortunately nobody
ever tried to reference stuff like _DYNAMIC_LINK and _gp_disp in C code...

Put back the lazy binding. For some bizarre reason, the linker occasionally
does not create a PLT entry for a symbol, so we test st_value!=0 to see
whether we can do a PLT fixup.

Er, turn off lazy binding for the moment. It doesn't seem to be fully working.

Simplify the GOT relocation code somewhat.

Actually do lazy binding on this platform.

Remove an old comment.

_rtld_bind() is not used on MIPS. Should probably move it to MD code.

Nuke -DRTLD_RELOCATE_SELF and `dodebug' from orbit.

_rtld_bind_start() is not used in MI code, so declare it in the MD code.

Slight tweak.

The GOT is Elf_Addr[], not Elf_Word[]...

Clean up a little.

Move GOT relocation code from _rtld_setup_pltgot() to
_rtld_relocate_nonplt_objects(). Add GOT self-relocation in
_rtld_relocate_nonplt_self().
MIPS ld.elf_so can now relocate itself.

Snapshot of work to make MIPS ld.elf_so relocatable.

Pass down an additional flag to _rtld_relocate_nonplt_objects() which
indicates whether we're relocating ld.elf_so itself. Use this in some places
rather than hackish tests on `dodebug'. (The Alpha and HPPA `dodebug' tests
were actually noops, because RTLD_RELOCATE_SELF is not set, and therefore
dodebug is always true.)

Introduce a new flag, `isdynamic', which is used to remember whether the
executable was of type ET_DYN. Use this instead of `mainprog' to determine
whether we need to do base-relative fixups of the PLT. (This allows loading
non-relocatable objects, should we desire to do that at some point...)

More const poisoning. Now the entire _rtld_bind() path useds a const Obj_Entry.

Re-poison a lot of consts, now that the mark shite is gone.

Split _rtld_relocate_plt_object() into two MD functions:
* _rtld_relocate_plt_lazy() fixes up all the relocs pointing to the PLT. (On
most platforms it just does a simple base-relative fixup; on SPARC it does
nothing.)
* _rtld_relocate_plt_object() does immediate binding for a PLT entry.
The basic gist is that this saves a bit of time on SPARC (where the iteration
through the pltrela table was gratuitous), and a little less time on all other
platforms. A whole lot of #ifdef'ed crap is moved out of reloc.c, too.

NOT tested on: hppa sh x86_64

Partially fix up some debug printf()s that don't need to use defobj.

A few things:
* Pass a symbol number to _rtld_find_symdef(), not a r_info.
* Don't try to do a symbol lookup when we find an unsupported relocation;
instead get the symbol name from the referencing object's strtab.
* Add preliminary support for `-z combreloc'-style startup optimization on
i386, `#ifdef COMBRELOC'.

Rename _rtld_relocate_nonplt_object() to _rtld_relocate_nonplt_objects(),
and push the outer loop into it. This actually shaves a couple % off startup
time at least on PCs.

Split MIPS relocation goo into mips_reloc.c.

Remove unused arguments of _rtld_find_symdef().

Make _rtld_setup_pltgot() a consistent interface on all platforms.

branches: 1.5.2;
Fix bug found by Izumi Tsutsui -- if _rtld_find_symdef returned NULL, the
runtime linker would crash. Restore behavior similar to version 1.3, where
the runtime linker continues on, ignoring the symbol.

Fix how underfined weak symbols are treated -- before, ld.so would do nothing
with them, rather than defaulting them to zero. This caused breakage with
the drawf EH stuff and init/fini code when they weren't used by the caller
(and hence the appropriate handlers were left undefined). Also fix an un-
initialized variable in symbol.c that only MIPS MD code tripped over.

branches: 1.3.4;
Make this more likely to compile with ld.elf_so changes. (But this is
untested.)

Update to match new SVR4-style definition names in <sys/exec_elf.h>.

branches: 1.1.2; 1.1.6;
Add support for mips.

ld.elf_so(1): Nix trailing whitespace.

No functional change intended.

branches: 1.10.58;
Merge from matt-nb5-mips64:
Add N32/N64 support for mips dynamic loader.

branches: 1.9.44;
Minor cleanup.

Add an iffy heuristic that allows us to do lazy binding with new objects, but
detect old objects and deal with them.

DOH! Adjust all the stack slots in _rtld_bind_start() so that the saved $a0
is not in _rtld_bind_mips()'s $a3 argument save area.

Update comments.

Snapshot of work to make MIPS ld.elf_so relocatable.

branches: 1.4.12;
Don't include <machine/regdef.h>.

Avoid confusing various C preprocessors by avoiding # [0-9]

branches: 1.2.2;
Oops - when assembled with PIC, the jal gets expanded, so what used to be
in the branch delay slot was no longer getting executed at the proper time.
This resulted in a corrupt ps_strings pointer and caused programs trying to
use ps_strings to fail.

Add support for mips.