Tidy up how __sigaction14_sigtramp.c is added to SRCS.

Decorate the x86_64 signal trampoline with CFI attributes easing unwinding

Combine the approach provided by Nikhil Benesch and Andrew Cagney.

Now, the unwinders (in gccgo, backtrace(3), etc) can unwind properly
the stack from a signal handler.

Fixes lib/55719 by Nikhil Benesch

Don't include sigtramp or foocontext routines in rumprun mode. They won't
work (since a rump kernel does not provide NetBSD _lwp syscalls nor
signals), but they cause unwanted symbols to be pulled in when the
resulting libc is linked.

problem reported by Robert Gifford on rumpkernel-users

G/c KMSRCS and KMINCLUDES now that we have common/lib/libc

kill sigcontext passing to signal handlers, we don't have to worry
about compatibility

Userland amd64 siginfo support.

Enable the libc-provided signal trampoline. The old __sigaction14
entry point has been replaced by the new __sigaction14() which is a
wrapper around the __sigaction_sigtramp system call (which is itself
not directly exposed outside of libc).

No shared library version change is necessary; no new symbols
are exposed outside of libc.

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.11.6; 1.11.16;
Exploit hidden __cerror

branches: 1.10.30;
Reorder the code for i386 and amd64 syscall stubs so that the 'jc' on error
is a forwards jump instead of a backwards jump that a P4 will mispredect (and
probably immediatly get a cache-line miss due to the way the code gets
aligned).

branches: 1.9.4;
Remove an obsolete comment.

Really, there is no need to use the old int0x80 syscall entry just for
getcontext(). There are some registers not properly saved with the
new syscall entry, but these are calee-saved, scratch or meaningless.
It's the setcontext() return path what matters.

Use the int 0x80 path for context system calls.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Use the syscall insn for system calls. Fix up some assembly to
remove either previously made errors, or to account for the
fact that syscall clobbers %ecx.

Revert previous: .S files are currently compiled with -traditional-cpp,
so __STDC__ is _not_ always defined.

__STDC__ is always defined on NetBSD.

* Add WSYSCALL() to SYS.h, which creates a system call with an
internal name and a weak alias for the name.
* Add a WEAKASM syscall list, and process it.
* Make sysarch() have an internal name (_sysarch()).

Initial commit of x86-64 specific parts of libc.

Add CVS Id

Decorate the x86_64 signal trampoline with CFI attributes easing unwinding

Combine the approach provided by Nikhil Benesch and Andrew Cagney.

Now, the unwinders (in gccgo, backtrace(3), etc) can unwind properly
the stack from a signal handler.

Fixes lib/55719 by Nikhil Benesch

Add strtof(3) and strtold(3); welcome libc 12.137.

Add machine-dependent definitions for gdtoa.

Revert previous and make frach be 0xc0000000 for NAN's generated by strtold()
as suggested by tron.

branches: 1.2.2;
Add ld formats for the unit-tests.

Add machine-dependent definitions for gdtoa.

Unify signbitl implementations.
(Unclear why they were different, it was only the comments that
differed)

Add a comment describing why the generic version works for both 80-bit
and 128-bit double.

branches: 1.18.16;
Don't include sigtramp or foocontext routines in rumprun mode. They won't
work (since a rump kernel does not provide NetBSD _lwp syscalls nor
signals), but they cause unwanted symbols to be pulled in when the
resulting libc is linked.

problem reported by Robert Gifford on rumpkernel-users

Remove "objects built from C sources" comments. Everyone can see
they're built from C sources because the source files end in .c (???)

add fpgetprec/fpsetprec

Move AMD64's bswap64 implementation from libc to src/common and share it
with the kernel.

Rename ${SRCS.{alpha,arm,...}.gen} to ${LSRCS.{alpha,arm,...}.gen} because
they ended up in ${LSRCS}, not ${SRCS}. ${SRCS.*} namespace will be used
for more useful things. No functional changes intended.

build {frexp,ldexp,modf} in the "compat" subtree
(Drop the modf assembler version. We have the same code in libm.)
(Drop the ldexp inline-assembler version. The same code is in libm as
scalbn; the ldexp there is just a wrapper providing error handling.)

Push back the descriptions of NaN formats, and descriptions of the
distinction between signalling NaNs and quiet NaNs back into the
machine-dependent headers; treat the implementation of __nanf in the
same spirit.

IEEE 754 leaves the distinction between signalling NaNs and quiet NANs
to the implementation, and unlike our headers used to suggest they're
not identical in the interpretation of the fraction's MSb; in due
course, make those of hppa, mips, sh3, and sh5 reflect reality.

branches: 1.11.6;
* Turn isinf(3) and isnan(3) into C99-style macros.
* Make it possible for ports to override these (i.e., VAX).
* Remove isnanl(), which was internal to libc only.

Add C99 fpclassify(), isfinite(), isnormal(), and signbit() macros.

Fix tpyo. (ieee854 -> ieee754)

Add __infinityf and __infinityl, float respectively long double analogs
of __infinity.

* Since there is no single portable IEEE 754 format for a long double,
keep a common implementation of isinfl() and isnanl() to be used by
platforms where `long double' == `double'; move others into
machine-dependent code.
* In due course, consider __VFP_FP__ on arm.

Rework how dependency generation is performed:

* DPSRCS contains extra dependencies, but is _NOT_ added to CLEANFILES.
This is a change of behaviour. If a Makefile wants the clean semantics
it must specifically append to CLEANFILES.
Resolves PR toolchain/5204.

* To recap: .d (depend) files are generated for all files in SRCS and DPSRCS
that have a suffix of: .c .m .s .S .C .cc .cpp .cxx

* If YHEADER is set, automatically add the .y->.h to DPSRCS & CLEANFILES

* Ensure that ${OBJS} ${POBJS} ${LOBJS} ${SOBJS} *.d depend upon ${DPSRCS}

* Deprecate the (short lived) DEPENDSRCS


Update the various Makefiles to these new semantics; generally either
adding to CLEANFILES (because DPSRCS doesn't do that anymore), or replacing
specific .o dependencies with DPSRCS entries.

Tested with "make -j 8 distribution" and "make distribution".

Build _isinfl() and _isnanl().

Rename ieee754_function.c to function_ieee754.c, following the convention
used in exec_format.c, loadfile_format.c, subsys_machdep.c etc.
Per discussion with Christos.

Add ucontext glue for x86_64.

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

Initial commit of x86-64 specific parts of libc.

libc/x86_64: Omit needless __PIC__ conditionals.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

branches: 1.4.2;
amd64 longjmp: Restore stack first, then signal mask.

Otherwise, a pending signal may be delivered on the wrong stack when
we restore the signal mask.

While here:

- Tidy the code a little bit.
- Sprinkle comments to explain what's going on.
- Use `xorl %eXX,%eXX' instead of `xorq %rXX,%rXX'.
=> Same effect, one byte shorter, breaks dep chain on more uarches.
- Use forward branches for statically predicted not-taken.
=> val==0 is unlikely in longjmp

PR lib/57946

branches: 1.3.26; 1.3.34;
Put missing END() markers to set ELF symbol size.

branches: 1.2.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.1.58; 1.1.64;
Initial commit of x86-64 specific parts of libc.

libc/x86_64: Omit needless __PIC__ conditionals.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

branches: 1.4.2;
amd64 longjmp: Restore stack first, then signal mask.

Otherwise, a pending signal may be delivered on the wrong stack when
we restore the signal mask.

While here:

- Tidy the code a little bit.
- Sprinkle comments to explain what's going on.
- Use `xorl %eXX,%eXX' instead of `xorq %rXX,%rXX'.
=> Same effect, one byte shorter, breaks dep chain on more uarches.
- Use forward branches for statically predicted not-taken.
=> val==0 is unlikely in longjmp

PR lib/57946

branches: 1.3.26; 1.3.34;
Put missing END() markers to set ELF symbol size.

branches: 1.2.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.1.58; 1.1.64;
Initial commit of x86-64 specific parts of libc.

Trailing whitespace

Allow storing and receiving the LWP private pointer via ucontext_t
on all platforms except VAX and IA64. Add fast access via register for
AMD64, i386 and SH3 ports. Use this fast access in libpthread to replace
the stack based pthread_self(). Implement skeleton support for Alpha,
HPPA, PowerPC, SPARC and SPARC64, but leave it disabled.

Ports that support this feature provide __HAVE____LWP_GETPRIVATE_FAST in
machine/types.h and a corresponding __lwp_getprivate_fast in
machine/mcontext.h.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

branches: 1.6.2;
Fix stack alignment for the thread stack. The AMD64 stack has 16 Bytes
alignment, but this is active before the return address is pushed onto
the stack. Fixes random crashes in va_start when the SSE registers are
saved.

Reduce diff to makecontext.

branches: 1.4.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.3.18;
Add missing __RCSID()

Make sure we reference getcontext() by its internal name.

Add ucontext glue for x86_64.

Put missing END() markers to set ELF symbol size.

branches: 1.1.64; 1.1.76;
Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.1.64; 1.1.76;
Initial commit of x86-64 specific parts of libc.

Move AMD64's bswap64 implementation from libc to src/common and share it
with the kernel.

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.3.62; 1.3.74;
simplify: it doesn't need an i387 to kill a sign bit

fix copyback from fp stack - we need 64 bits

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.6.8; 1.6.18;
PR/44293: Paul Goyette: Fix the mess of the rounding code.

even simpler.

add a simpler version.

Instead of using a PICGOT relocation for map, use just a pc-relative one
since it is guaranteed to be close enough. Fixes issue with binutils-2.21.1a
(probably a bug).

mov -> lea to access _map table.

Initial commit of x86-64 specific parts of libc.

branches: 1.4.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.3.10;
ext_int bit is no more.

branches: 1.2.16;
Make this compile.

C99 7.12.3.1: add IEEE library portions of fpclassify. Don't build these
yet as the VAX implementation is still subject to discussion.

Put missing END() markers to set ELF symbol size.

branches: 1.3.62; 1.3.74;
Attempt to juggle the 2 seperarate status/mask bit sets for plain FP
and XMM to provide a consistent interface.

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.1.10; 1.1.20;
add fpgetprec/fpsetprec

Put missing END() markers to set ELF symbol size.

branches: 1.4.8; 1.4.18;
PR/44293: Paul Goyette: Fix the mess of the rounding code.

Attempt to juggle the 2 seperarate status/mask bit sets for plain FP
and XMM to provide a consistent interface.

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.3.62; 1.3.74;
Attempt to juggle the 2 seperarate status/mask bit sets for plain FP
and XMM to provide a consistent interface.

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.5.6; 1.5.16;
let one bit more through to SSE, to make FP_X_IMP work

branches: 1.4.2;
Fix fpsetmask(3) to be able to clear bits previously set.

Attempt to juggle the 2 seperarate status/mask bit sets for plain FP
and XMM to provide a consistent interface.

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.1.10; 1.1.20;
add fpgetprec/fpsetprec

Put missing END() markers to set ELF symbol size.

branches: 1.4.8; 1.4.18;
PR/44293: Paul Goyette: Fix the mess of the rounding code.

Attempt to juggle the 2 seperarate status/mask bit sets for plain FP
and XMM to provide a consistent interface.

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.5.62; 1.5.74;
we also have to reset bits in the i387 status
as required

-clear status bits in mxcsr as required
-return the old accumulated status bits

Attempt to juggle the 2 seperarate status/mask bit sets for plain FP
and XMM to provide a consistent interface.

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

Initial commit of x86-64 specific parts of libc.

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

Initial commit of x86-64 specific parts of libc.

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

Initial commit of x86-64 specific parts of libc.

make sure the infinity returned by HUGE_VALL has the "implicit"
bit set, otherwise it is invalid
This code is unlikely to be hit because gcc (and clang) use
their builtins for these special values.

branches: 1.3.2;
make infinityl match what gdtoa thinks.

Add missing __RCSID()

Add __infinityf and __infinityl, float respectively long double analogs
of __infinity.

branches: 1.3.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.10;
ext_int bit is no more.

branches: 1.1.16;
C99 7.12.3.2: add library portions of isfinite, but don't build these just
yet.

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

Initial commit of x86-64 specific parts of libc.

ext_int bit is no more.

branches: 1.5.16;
* Turn isinf(3) and isnan(3) into C99-style macros.
* Make it possible for ports to override these (i.e., VAX).
* Remove isnanl(), which was internal to libc only.

Err, rename some members added in previous to make them reflect their
semantics better.

Retire local union { floating-type; struct ieee_prec; } in favor of those
available from <machine/ieee.h>

Sync with i386:
Update to account for separate handling of the explicit integer bit;
simplifies a little.

* Since there is no single portable IEEE 754 format for a long double,
keep a common implementation of isinfl() and isnanl() to be used by
platforms where `long double' == `double'; move others into
machine-dependent code.
* In due course, consider __VFP_FP__ on arm.

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

Initial commit of x86-64 specific parts of libc.

Revert previous and make frach be 0xc0000000 for NAN's generated by strtold()
as suggested by tron.

Make NAN tests consistent with other platforms and FreeBSD.

branches: 1.6.34;
ext_int bit is no more.

branches: 1.5.16;
* Turn isinf(3) and isnan(3) into C99-style macros.
* Make it possible for ports to override these (i.e., VAX).
* Remove isnanl(), which was internal to libc only.

Err, rename some members added in previous to make them reflect their
semantics better.

Retire local union { floating-type; struct ieee_prec; } in favor of those
available from <machine/ieee.h>

Sync with i386:
Update to account for separate handling of the explicit integer bit;
simplifies a little.

* Since there is no single portable IEEE 754 format for a long double,
keep a common implementation of isinfl() and isnanl() to be used by
platforms where `long double' == `double'; move others into
machine-dependent code.
* In due course, consider __VFP_FP__ on arm.

replaced by code in libc/compat/gen

Fix -Wshadow warnings.

Initial commit of x86-64 specific parts of libc.

If SRCS contains any .S files then remove the corresponding .c file from
SRCS and add to LSRCS (for lint).
Change the 'string' Makefiles so that the arch/*/string/Makefile.inc
need only specify the .S files for that architecture and not the .c
files for all the files they don't override.

branches: 1.3.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.30;
Get the stack alignment right: the stack arguments must start
at a 16-byte aligned address, the return address is at an
"odd" address.
approved by fvdl

Add ucontext glue for x86_64.

build {frexp,ldexp,modf} in the "compat" subtree
(Drop the modf assembler version. We have the same code in libm.)
(Drop the ldexp inline-assembler version. The same code is in libm as
scalbn; the ldexp there is just a wrapper providing error handling.)

Return the right value for modf(). Fixes PR 22503.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

Make NAN a compile time constant (with help from the compiler). Suggested
by krister. Fixes PR 40695.
Make references to the old construct (which we can't remove for binary
compatibility reasons) emit a linker warning.

branches: 1.3.2; 1.3.32;
Push back the descriptions of NaN formats, and descriptions of the
distinction between signalling NaNs and quiet NaNs back into the
machine-dependent headers; treat the implementation of __nanf in the
same spirit.

IEEE 754 leaves the distinction between signalling NaNs and quiet NANs
to the implementation, and unlike our headers used to suggest they're
not identical in the interpretation of the fraction's MSb; in due
course, make those of hppa, mips, sh3, and sh5 reflect reality.

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

Initial commit of x86-64 specific parts of libc.

libc/x86_64: Omit needless __PIC__ conditionals.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

branches: 1.6.36;
Put missing END() markers to set ELF symbol size.

branches: 1.5.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.4.4; 1.4.8; 1.4.28;
Remove clause 3 and 4 from TNF licenses

branches: 1.3.16;
-check for a NULL uc_link before calling setcontext(2); do a real exit(3)
instead with exit handlers and all that
-If setcontext(2) returns (which it shouldn't), do an _exit(-1) rather
than relying on a sensible return value to use as exit code. Makes
it less likely that an ucontext corruption goes unnoticed.

alignment trouble: uc_link is at offset 8

Add ucontext glue for x86_64.

Unify signbitl implementations.
(Unclear why they were different, it was only the comments that
differed)

Add a comment describing why the generic version works for both 80-bit
and 128-bit double.

branches: 1.2.8; 1.2.64;
Remove clause 3 and 4 from TNF licenses

branches: 1.1.30;
Add C99 fpclassify(), isfinite(), isnormal(), and signbit() macros.

libc/x86_64: Omit needless __PIC__ conditionals.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

branches: 1.6.36;
Put missing END() markers to set ELF symbol size.

branches: 1.5.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.4.36; 1.4.42;
Don't clobber callee save registers r12 & r13 in swapcontext. They
were saved in the stack, but the subsequent swapcontext would return
to the earlier stack frame and never restore them. Fixes puffs
with default compiler flags on amd64.

Thanks to Mihai Chelaru for providing access to an amd64 machine
for debugging this problem.

branches: 1.3.2; 1.3.10;
Use correct stack offsets after pushing values onto it.

branches: 1.2.2; 1.2.4;
Make sure we reference getcontext() by its internal name.

Add ucontext glue for x86_64.

Rename ${SRCS.{alpha,arm,...}.gen} to ${LSRCS.{alpha,arm,...}.gen} because
they ended up in ${LSRCS}, not ${SRCS}. ${SRCS.*} namespace will be used
for more useful things. No functional changes intended.

Rework how dependency generation is performed:

* DPSRCS contains extra dependencies, but is _NOT_ added to CLEANFILES.
This is a change of behaviour. If a Makefile wants the clean semantics
it must specifically append to CLEANFILES.
Resolves PR toolchain/5204.

* To recap: .d (depend) files are generated for all files in SRCS and DPSRCS
that have a suffix of: .c .m .s .S .C .cc .cpp .cxx

* If YHEADER is set, automatically add the .y->.h to DPSRCS & CLEANFILES

* Ensure that ${OBJS} ${POBJS} ${LOBJS} ${SOBJS} *.d depend upon ${DPSRCS}

* Deprecate the (short lived) DEPENDSRCS


Update the various Makefiles to these new semantics; generally either
adding to CLEANFILES (because DPSRCS doesn't do that anymore), or replacing
specific .o dependencies with DPSRCS entries.

Tested with "make -j 8 distribution" and "make distribution".

Initial commit of x86-64 specific parts of libc.

Change NO_SRCS lines to specify .S in order to exclude the .c file from
SRCS but add it to LSRCS (sort of makes sense!).

Add the 'abs', 'div' and 'erand48' sources to stdlib/Makefile.inc.
Change the arch files only include the .S files.
This adds imaxdiv() to some archs where it was missing.

branches: 1.4.6;
Add C99 functions imaxabs and imaxdiv.

branches: 1.3.20;
build erand48_ieee754.c on everything but vax

Rework how dependency generation is performed:

* DPSRCS contains extra dependencies, but is _NOT_ added to CLEANFILES.
This is a change of behaviour. If a Makefile wants the clean semantics
it must specifically append to CLEANFILES.
Resolves PR toolchain/5204.

* To recap: .d (depend) files are generated for all files in SRCS and DPSRCS
that have a suffix of: .c .m .s .S .C .cc .cpp .cxx

* If YHEADER is set, automatically add the .y->.h to DPSRCS & CLEANFILES

* Ensure that ${OBJS} ${POBJS} ${LOBJS} ${SOBJS} *.d depend upon ${DPSRCS}

* Deprecate the (short lived) DEPENDSRCS


Update the various Makefiles to these new semantics; generally either
adding to CLEANFILES (because DPSRCS doesn't do that anymore), or replacing
specific .o dependencies with DPSRCS entries.

Tested with "make -j 8 distribution" and "make distribution".

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.2.62; 1.2.74;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.1.64; 1.1.76;
Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.2.6; 1.2.26; 1.2.38;
Use WEAK_ALIAS.
Add imaxabs weak alias.

branches: 1.1.34;
Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.2.6; 1.2.26; 1.2.38;
Use WEAK_ALIAS

branches: 1.1.34;
Initial commit of x86-64 specific parts of libc.

Make x86 use the C versions of bcmp() and memcmp().

branches: 1.6.26;
No need for bzero, memset provides it.

Remove now-non-existant bzero.S from sources list.

branches: 1.4.6; 1.4.12;
If SRCS contains any .S files then remove the corresponding .c file from
SRCS and add to LSRCS (for lint).
Change the 'string' Makefiles so that the arch/*/string/Makefile.inc
need only specify the .S files for that architecture and not the .c
files for all the files they don't override.

Change all archs so that strchr.[cS] and strrchr.[cS] exist and generate
duplicate symbols for index() and rindex().
libc and kernel build ok for affected archs (i386, amd64, vax, sun3,
evbmips-eb) all seem ok.
(vax might lose an asm index() - but comments imply it is worse than the C)

Rework how dependency generation is performed:

* DPSRCS contains extra dependencies, but is _NOT_ added to CLEANFILES.
This is a change of behaviour. If a Makefile wants the clean semantics
it must specifically append to CLEANFILES.
Resolves PR toolchain/5204.

* To recap: .d (depend) files are generated for all files in SRCS and DPSRCS
that have a suffix of: .c .m .s .S .C .cc .cpp .cxx

* If YHEADER is set, automatically add the .y->.h to DPSRCS & CLEANFILES

* Ensure that ${OBJS} ${POBJS} ${LOBJS} ${SOBJS} *.d depend upon ${DPSRCS}

* Deprecate the (short lived) DEPENDSRCS


Update the various Makefiles to these new semantics; generally either
adding to CLEANFILES (because DPSRCS doesn't do that anymore), or replacing
specific .o dependencies with DPSRCS entries.

Tested with "make -j 8 distribution" and "make distribution".

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

replace the str*() functions by speed optimized versions, submitted by
J.T. Conklin per PR port-amd64/25411

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

Fix typos found by Giorgos Keramid and Steve Kargl on freebsd-arch mailing
list.

replace the str*() functions by speed optimized versions, submitted by
J.T. Conklin per PR port-amd64/25411

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

the char we fill with shouldn't be sign-extended
(the way the length argument is dealt with looks suspicious
too, but this would only have an effect for >=2G fields)
this can probably be optimized...

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

replace the str*() functions by speed optimized versions, submitted by
J.T. Conklin per PR port-amd64/25411

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

fix alignment check for source
should fix PR port-amd64/26416 by Nicolas Joly

replace the str*() functions by speed optimized versions, submitted by
J.T. Conklin per PR port-amd64/25411

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

replace the str*() functions by speed optimized versions, submitted by
J.T. Conklin per PR port-amd64/25411

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

Fix typos found by Giorgos Keramid and Steve Kargl on freebsd-arch mailing
list.

replace the str*() functions by speed optimized versions, submitted by
J.T. Conklin per PR port-amd64/25411

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

replace the str*() functions by speed optimized versions, submitted by
J.T. Conklin per PR port-amd64/25411

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

Fix typos found by Giorgos Keramid and Steve Kargl on freebsd-arch mailing
list.

replace the str*() functions by speed optimized versions, submitted by
J.T. Conklin per PR port-amd64/25411

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.3.50; 1.3.62;
Fix another typo in comments found by Ricardo Nabinger Sanchez
on the freebsd-arch mailing list.

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

Use reach-over sources from common/lib/libc

replace the str*() functions by speed optimized versions, submitted by
J.T. Conklin per PR port-amd64/25411

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.3.50; 1.3.62;
Fix typos found by Giorgos Keramid and Steve Kargl on freebsd-arch mailing
list.

netbsd.org->NetBSD.org

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Use the syscall insn for system calls. Fix up some assembly to
remove either previously made errors, or to account for the
fact that syscall clobbers %ecx.

Initial commit of x86-64 specific parts of libc.

PR/58748: Use '_SYSCALL_ERR' instead of 'jmp CERROR' for the hand-crafted
system calls (the regular system calls do this already). This is a noop
for amd64 and it is done for cosmetic reasons, but for i386 it produces
correct pic code.

libc/x86_64: Omit needless __PIC__ conditionals.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

branches: 1.5.36;
Put missing END() markers to set ELF symbol size.

branches: 1.4.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.3.6;
Exploit hidden __cerror

branches: 1.2.56;
Fix the EINVAL return path.

Add clone(2) implementation.

remove files moved to the new compat layout.

Initial commit of x86-64 specific parts of libc.

Merge all MD __sigaction14_sigtramp.c copies into one:
- sparc and sparc64 were not using version 0 sigcontext when there were
no arguments in the signal version. This was probably a bug.
- vax is using +1 the version numbers of the other archs.
- Only hppa was defining __LIBC12_SOURCE__ so it was getting a working
sigcontext before. all the other ports that supported sigcontext had
the compat code disabled.
[pointed out by thorpej, thanks!]
If we want to remove sigcontext support from userland at least now there
is less work to do so.

Whitespace.

branches: 1.10.8; 1.10.28; 1.10.40;
Remove clause 3 and 4 from TNF licenses

branches: 1.9.18;
make these consistent.

Add missing __RCSID()

kill sigcontext passing to signal handlers, we don't have to worry
about compatibility

save errno while trying to install a !SA_SIGINFO trampoline -- this
is expected to fail with !COMPAT_16 kernels, and we shouldn't
overwrite errno in this case

Need a couple more headers for the last change.

Sync with the i386 version.

Userland amd64 siginfo support.

Add ucontext glue for x86_64.

New __sigaction14() system call stub which registers the signal
trampoline, and the signal trampolines themselves.

NOTE: These are not yet enabled; they will be enabled after further
testing on more architectures.

remove files moved to the new compat layout.

disembowel -- there is no kernel support anyway

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

kill sigcontext passing to signal handlers, we don't have to worry
about compatibility

No need to use movq for the small immediate values here, they'll be
zero-extended with movl.

The fast syscall path clobbers 2 registers. Which is fine for a plain
system call, as long as the stub knows about it. However, it's bad
for sigreturn. Hence, use the old entry point for sigreturn. XXX

Remove fs and gs kludge.

New __sigaction14() system call stub which registers the signal
trampoline, and the signal trampolines themselves.

NOTE: These are not yet enabled; they will be enabled after further
testing on more architectures.

Restore RSP from mcontext

Fixes unwinding of multiple frames without base pointer.

Patch by: Nikhil Benesch via PR lib/55719

Decorate the x86_64 signal trampoline with CFI attributes easing unwinding

Combine the approach provided by Nikhil Benesch and Andrew Cagney.

Now, the unwinders (in gccgo, backtrace(3), etc) can unwind properly
the stack from a signal handler.

Fixes lib/55719 by Nikhil Benesch

Add cfi annotations so that gdb can unwind the stack through signal handlers.

branches: 1.6.24;
Put missing END() markers to set ELF symbol size.

branches: 1.5.48; 1.5.60;
if setcontext(2) returns, _exit(2) with a return code of -1 instead
of relying on a sensible return value

replace the last occurence of an "int 0x80" syscall

Use the int 0x80 path for context system calls.

Get ucontext pointer back out of callee-saved register %r15.

Userland amd64 siginfo support.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

PR/58748: Use '_SYSCALL_ERR' instead of 'jmp CERROR' for the hand-crafted
system calls (the regular system calls do this already). This is a noop
for amd64 and it is done for cosmetic reasons, but for i386 it produces
correct pic code.

Put missing END() markers to set ELF symbol size.

branches: 1.4.6; 1.4.16;
Exploit hidden __cerror

branches: 1.3.56;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Use the syscall insn for system calls. Fix up some assembly to
remove either previously made errors, or to account for the
fact that syscall clobbers %ecx.

Initial commit of x86-64 specific parts of libc.

PR/58748: Use '_SYSCALL_ERR' instead of 'jmp CERROR' for the hand-crafted
system calls (the regular system calls do this already). This is a noop
for amd64 and it is done for cosmetic reasons, but for i386 it produces
correct pic code.

Put missing END() markers to set ELF symbol size.

branches: 1.5.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.4.6;
Exploit hidden __cerror

branches: 1.3.56;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Use the syscall insn for system calls. Fix up some assembly to
remove either previously made errors, or to account for the
fact that syscall clobbers %ecx.

Initial commit of x86-64 specific parts of libc.

libc/x86_64: Omit needless __PIC__ conditionals.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

branches: 1.7.36;
Put missing END() markers to set ELF symbol size.

branches: 1.6.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.5.2;
Make __cerror protected to restore ABI leak in older libc versions,
where e.g. librt referenced the copy from libc. This still allows libc
to use PC-relative jumps.

branches: 1.4.2;
Explicitly mark __cerror as hidden

branches: 1.3.56;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Use the syscall insn for system calls. Fix up some assembly to
remove either previously made errors, or to account for the
fact that syscall clobbers %ecx.

Initial commit of x86-64 specific parts of libc.

Mark exect(3) obsolete and bind it to plain execve(2) on all platforms

The original exect(2) from BSD4.2 was enabling bit for tracing
(single-step mode) and calling execve(2). The purpose of it was to generate
a signal for a tracer once the application will change its image to a new
program.

This approach no longer works as:
- exect(2) traces (single-steps) libc and it requires hundreds or
thousands steps before entering a new image
- it's vax and x86 specific code
- this functionality has been moved to the kernel - once a process is
traced it will generate SIGTRAP with si_code TRAP_EXEC and route it to
its debugger
- the side effects and unportability make this interface unusable
- there are no known users of this interface
- it apparently never worked better since day0 of NetBSD ("day0 bug")

Users are requested to move to other execve(2) variants. Calling current
execve(2) as it is the most similar behavior to this one from BSD4.2.

Discussed several times on mailing lists and in PR/51700.

Add warning to exect(3) telling about marking this function obsolete.

This function is prepared to be removed in next libc major bump.

Sponsored by <The NetBSD Foundation>

branches: 1.4.6; 1.4.10;
Put missing END() markers to set ELF symbol size.

branches: 1.3.6; 1.3.16;
Exploit hidden __cerror

branches: 1.2.56;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.3.62; 1.3.74;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Implement pthread_atfork() (in libc, because the required threadlib
stub behavior is exactly the same as the usual behavior).

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.3.62; 1.3.74;
Really, there is no need to use the old int0x80 syscall entry just for
getcontext(). There are some registers not properly saved with the
new syscall entry, but these are calee-saved, scratch or meaningless.
It's the setcontext() return path what matters.

Use the int 0x80 path for context system calls.

Add ucontext glue for x86_64.

remove files moved to the new compat layout.

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.2.62; 1.2.74;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

PR/58748: Use '_SYSCALL_ERR' instead of 'jmp CERROR' for the hand-crafted
system calls (the regular system calls do this already). This is a noop
for amd64 and it is done for cosmetic reasons, but for i386 it produces
correct pic code.

libc/x86_64: Omit needless __PIC__ conditionals.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

branches: 1.7.28;
Save and restore all the registers we need instead of playing tricks and
"knowing" which registers the compiler clobbers. gcc-5.3 clobbers both
rcx and rdx...

Fix ptrace %rcx corruption when pthread_errno() is used. Small example:
#include <sys/types.h>
#include <stdio.h>
#include <sys/ptrace.h>
int main(void) { ptrace(18, getpid(), NULL, 0xabcd); }
The -lpthread cases pases 0 instead of 0xabcd

branches: 1.5.2;
Put missing END() markers to set ELF symbol size.

branches: 1.4.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.3.6;
Exploit hidden __cerror

branches: 1.2.56;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

PR/58748: Use '_SYSCALL_ERR' instead of 'jmp CERROR' for the hand-crafted
system calls (the regular system calls do this already). This is a noop
for amd64 and it is done for cosmetic reasons, but for i386 it produces
correct pic code.

Put missing END() markers to set ELF symbol size.

branches: 1.5.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.4.6;
Exploit hidden __cerror

branches: 1.3.2; 1.3.6;
Avoid calling a syscall when argument to sbrk(2) is zero.
OK by <ad>.

branches: 1.2.32;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

These files are obsolete; setlogin() is now implemented in C with a
small syscall stub.

Initial commit of x86-64 specific parts of libc.

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

disembowel -- there is no kernel support anyway

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Initial commit of x86-64 specific parts of libc.

Rename "syscall" to "_syscall" and provide "syscall" as a weak alias.

branches: 1.4.72;
syscall() has to be implemented in the kernel - so is a normal system call here.This has always been broken, so I suspect everything is using __syscall().

branches: 1.3.22;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Use the syscall insn for system calls. Fix up some assembly to
remove either previously made errors, or to account for the
fact that syscall clobbers %ecx.

Initial commit of x86-64 specific parts of libc.